CN103477544A - Common-mode filter device and system - Google Patents
Common-mode filter device and system Download PDFInfo
- Publication number
- CN103477544A CN103477544A CN2012800176332A CN201280017633A CN103477544A CN 103477544 A CN103477544 A CN 103477544A CN 2012800176332 A CN2012800176332 A CN 2012800176332A CN 201280017633 A CN201280017633 A CN 201280017633A CN 103477544 A CN103477544 A CN 103477544A
- Authority
- CN
- China
- Prior art keywords
- common mode
- filtering apparatus
- common
- current
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims description 173
- 238000004804 winding Methods 0.000 claims description 121
- 230000005611 electricity Effects 0.000 claims description 80
- 239000004020 conductor Substances 0.000 claims description 37
- 238000005259 measurement Methods 0.000 claims description 37
- 238000000034 method Methods 0.000 claims description 34
- 230000006870 function Effects 0.000 claims description 26
- 230000001276 controlling effect Effects 0.000 claims description 14
- 230000001939 inductive effect Effects 0.000 claims description 13
- 238000009413 insulation Methods 0.000 claims description 13
- 238000013016 damping Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000008520 organization Effects 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 230000008447 perception Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000005300 metallic glass Substances 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- 239000011162 core material Substances 0.000 description 23
- 238000010586 diagram Methods 0.000 description 14
- 238000013461 design Methods 0.000 description 11
- 230000004907 flux Effects 0.000 description 9
- 230000008859 change Effects 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000011257 shell material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 206010049244 Ankyloglossia congenital Diseases 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 239000005347 annealed glass Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
- H01F19/06—Broad-band transformers, e.g. suitable for handling frequencies well down into the audio range
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F2017/0093—Common mode choke coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/42—Balance/unbalance networks
- H03H7/425—Balance-balance networks
- H03H7/427—Common-mode filters
Abstract
A common-mode filter device and system for regulating aspects of power conversion by a power converter from external source such as solar panels to another external circuit wherein the common-mode filter device substantially attenuates common-mode voltage at the switching frequency plus harmonics of the power converter. The power converter can be single phase, but is preferably a multiple phase.
Description
Technical field
The present invention relates to a kind of device for electric power converter and inverter system and system of using active common mode filter.Particularly, the present invention relates to a kind of common mode filtering apparatus and system of being regulated to the many aspects of the electric power conversion of utility network for the external source to from such as solar panels, but the invention is not restricted to this.
Background technology
Electric power converter is used to transfer electrical power between circuit.Each circuit is connected to the different electricity port of electric power converter.Each electricity port has at least two power conductors.Electricity port voltage is characterized by differential mode (DM) voltage and common mode (CM) voltage.DM voltage is the electrical potential difference between paired power conductor.CM voltage is all power conductors and such as the average potential difference between the reference potential of ground (the earth).Similarly, the electricity port electric current is characterized by DM electric current and CM electric current.The DM electric current is poor between the electric current in paired power conductor.The CM electric current is the electric current sum on all power conductors.
Use following initialism in the whole literature:
The CM common mode
The DM differential mode
The EMI electromagnetic interference
PWM pulse width modulation
The uninterrupted supply of electric power of UPS
The VSI voltage source inverter
In the good electric power converter of design, flow of power is mainly via the power conductor of appointment.Therefore, the CM electric current is little, and the flow of power at electricity port place is mainly determined by DM voltage and DM electric current.When selecting the electric power converter topology, DM voltage and DM current characteristics are main considerations.CM voltage and CM current characteristics are less important typically.For electric power converter, the key performance measurement comprises work DM voltage range, power conversion efficiency, installation cost, size and quality.
The systematic CM voltage of the electric power converter of many optimum performances tool between electricity port.For example, three-phase voltage source inverter (VSI) is DC to the AC switching mode type electric power converter that has remarkable CM voltage difference between DC and AC electricity port.Referring to the exemplary VSI circuit in Fig. 1.CM voltage comprises the harmonic wave of DC component, AC port frequency and the harmonic wave of VSI switching frequency.Referring to the exemplary VSI CM voltage waveform in Fig. 2.Typical case referring to low frequency (switch the is average) component of the VSI CM voltage waveform in Fig. 3 draws.
Efficient inverter be expectation but cost must be rationally.VSI has high efficiency and low cost at present, but relevant CM voltage produces unacceptable high earth-current when it uses together to photo-voltaic power supply.Therefore, provide low-cost and while using together with photo-voltaic power supply the efficient electrical power transducer with the lowland current work be useful.
In many application of using VSI, the external circuit impedance between electricity port is high, thereby the CM voltage difference only produces little CM electric current.For example, most of variable speed electric motors, particularlies drive and use three-phase VSI.The CM voltage difference is applied on motor winding insulation layer, and this typically belongs to specific type.Insulating barrier is characterized by the little electric capacity of (the earth) over the ground.The AC component of CM voltage produces little CM electric current in insulation electric capacity, and this is normally permissible.
In some applications, electric capacity extremely is significant, for example, is connected to the solar photovoltaic generation system of AC utility network.There is the CM electric current that typically produces unacceptable level at the electric power converter of the CM voltage difference at switching frequency and harmonic wave place.For large photovoltaic system, there is the CM electric current that also may produce unacceptable level at the electric power converter of the CM voltage difference at utility network frequency and harmonic wave place.There is the Low ESR external circuit for the CM electric current in other application for can not be interrupted supply of electric power (UPS) system such as two conversions between the input and output electricity port.In the case, any significant CM voltage will cause the CM electric current of unacceptable level.
Prior art scheme for the application with the outside CM circuit of highland impedance or Low ESR comprises:
● there is the electric power converter topology of low CM voltage or zero CM voltage.This take the performance of other critical aspects usually, and for example DM voltage range, power conversion efficiency, installation cost, size and quality are cost.
● the electric power converter topology with remarkable CM voltage be combined with isolating transformer.Transformer reduces power conversion efficiency and increases installation cost, size and quality.
Therefore, the purpose of this invention is to provide a kind of improved common mode filtering apparatus and system, this improved common mode filtering apparatus and system overcomes or at least significantly improve one or more problem of the prior art.
Summary of the invention
Therefore, in one form, the invention provides a kind of common mode filtering apparatus and system of being regulated for the many aspects of the electric power conversion from the external source such as solar panels to another external circuit to being undertaken by electric power converter, wherein, significantly the decayed switching frequency of electric power converter of common mode filtering apparatus adds the common-mode voltage at harmonic wave place.Electric power converter can be for single-phase.
Preferably, electric power converter is heterogeneous.Therefore, according to the present invention, a kind of common mode filtering apparatus and system of being regulated to the many aspects of the electric power conversion of the AC system such as utility network for the external source to from such as solar panels is provided, wherein, significantly decayed AC system fundamental frequency of CM filter apparatus adds that harmonic wave place and the electric power converter that is associated switching frequency adds the CM voltage at harmonic wave place.
The CM filter apparatus can include the source filter configuration.
The CM filter apparatus can comprise the passive filter configuration.
The active filter of CM filter apparatus and system or passive filter can have the CM transformer that contains a plurality of armature windings.Armature winding all has the equal number of turn.Each power terminal of armature winding and electricity port is connected in series.
Active C M filter also can comprise secondary winding.
In one form, active C M filter can comprise and can be connected to via inductive impedance the control power supply of controlled voltage source.
The CM filter apparatus can comprise the inductive impedance in 25% to 200% scope of the CM static exciter inductance that is in the secondary winding place and records at the switching frequency place of the electric power converter be associated.
According to a kind of form of the present invention, provide and treated and electric power converter is in series used to support CM voltage difference between the electric power converter port and the active filter at acceptable level by the CM Current Control.
Active filter can utilize the CM electric current recorded in real time, and provides the real-time control to the CM electric current with CM electric current return path and impedance.
Active filter can be active electrical source, and this active electrical source is the controllable voltage source with series impedance of the secondary winding that is coupled to the CM transformer.
Series impedance can be mainly inductive impedance.
Inductive impedance be in the secondary winding place and 25% to 200% scope of the CM static exciter inductance that records at the switching frequency place of the electric power converter be associated in.
In a kind of preferred form, controllable voltage source is the full-bridge with pulse width modulation (PWM).Yet controllable voltage source can be the half-bridge with PWM.
The controllable voltage source PWM cycle can change and synchronize with the switch of the electric power converter be associated.
Preferably, the CM transformer has the magnetizing inductance in armature winding place and 0.1H to the 10H scope that records at utility network frequency place.This can realize with the CM transformer with core of being made by amorphous metal (metal glass).
In a kind of form of the present invention, common mode filtering apparatus and system are for being used to the electric power converter of transfer electrical power between circuit, different electricity port and each electricity port that wherein each circuit is connected to electric power converter have at least two power conductors, wherein electricity port voltage is characterized by differential mode (DM) voltage and common mode (CM) voltage, wherein, DM voltage is the electrical potential difference between paired power conductor, and CM voltage is all power conductors and such as the average potential difference between the reference potential of ground (the earth), and the electricity port electric current is characterized by DM electric current and CM electric current, wherein the DM electric current is poor between the electric current in paired power conductor, and the CM electric current is that the external circuit via typically comprising ground (the earth) conductor on all power conductors flow back into the electric current sum in one or more other electricity port of electric power converter,
Wherein, common mode filtering apparatus and system comprise the active filter of AC component that in series uses to limit and control the common mode current at electricity port place with the electricity port of electric power converter.
And wherein, measure the common mode current at electricity port place, and the AC component of the restriction of use feedback controller and control common mode current is to adjust controlled voltage source.
A kind of method of the CM of solution inductor saturation problem is to use switching frequency and the two CM filter of being decayed of low frequency CM voltage.This also contributes to limit low frequency CM electric current.Shortcoming is to have increased remarkable cost, size and the quality of electric power converter for the passive CM filter of the low frequency CM voltage of decaying.Also be difficult to arrange the effective damping that prevents resonance and the overshoot of CM voltage.These restrictions can overcome with active C M filter.
Most of prior art application for active C M filter has been restricted to the performance increased in electromagnetic interface filter.In electromagnetic interface filter application, CM voltage is less and only under high frequency (typically > 100kHZ), decayed significantly with respect to DM voltage.The design limitations of these systems such as capacitive couplings and/or the preventions such as control based on voltage its be expanded tremendously low frequency CM voltage or with compare the voltage in the CM of the level of signifiance with DM voltage.
Other prior art application for active C M filter in variable speed electric motors, particularly drives provides the decay of carrying out in the switching frequency CM of level of signifiance voltage comparing with DM voltage.Due to for example control based on voltage of design limitations, these systems can not be expanded tremendously low frequency CM voltage.
The active filter of common mode filtering apparatus and system can have the transformer that contains secondary winding and a plurality of armature windings.Armature winding all has the equal number of turn.Each power terminal of armature winding and electricity port is connected in series.Secondary winding is connected to controlled voltage source via impedance.
The electric power converter that the invention enables optimum performance is such as standard VSI can be in the situation that in not having isolating transformer to be used in to have the application of high earth capacitance or the outside CM circuit of Low ESR.For example, photovoltaic application and the uninterrupted supply of electric power of two conversion.
The invention process, to switching frequency and the two active filter of being decayed of low frequency CM voltage, is significant even they are compared with DM voltage.
Active C M filter can have the transformer that contains secondary winding and a plurality of armature windings.Armature winding all has the equal number of turn.Each power supply terminal of armature winding and the appended electricity port of receiving of CM filter is connected in series.Secondary winding is connected to active control voltage source.
In one embodiment, active control voltage source is the controlled voltage source with the impedance of series electrical perception.
In one form, can measure the CM electric current at electricity port place.Use the AC component of feedback controller restriction and control CM electric current to adjust active control power supply.
In other embodiments, the estimation of the CM voltage at electric power converter electricity port place or measurement also are used to provide the feedfoward control to active control power supply.This can reduce the AC component of the CM electric current at the frequency place on the bandwidth of closed loop CM current controller.For example,, at electric power converter switching frequency and harmonic wave place.
In other embodiments, obtain the active damping of CM filter response by the suitable closed-loop dynamic characteristic in CM Current Feedback Control device.
In some embodiments, provide circuit the CM electric current of the output from the CM transformer to be turned back to one or more other electricity port of electric power converter.
In a typical case, this circuit will comprise at least one series electrical capacitive impedance.
In other embodiments, the CM electric current from the output of CM transformer turns back to other electricity port of electric power converter via the external circuit such as insulation electric capacity.
Except active control forces most of CM transformer magnetizing current flows in secondary control winding rather than in armature winding, disclosed active filter be operated in the conceptive work that is similar to passive CM filter.The method makes the effective impedance of the effective impedance of CM transformer far above passive CM transformer, choke or the inductor of equal size.Than passive CM filter, this has reduced cost, size and the quality of disclosed active C M filter.
Conceptive, can also and electric power converter in series add the CM filter with support CM voltage difference between the electric power converter port and by the CM Current Control at acceptable level.Utilize the method, the high-performance electric force transducer has such as VSI can be used in the application of high earth capacitance or the outside CM circuit of Low ESR.The CM filter can be passive or active type.
In the prior art, usually use the passive CM filter of connecting with one or more electricity port of electric power converter to reduce the electromagnetic interference (EMI) of conduction.In this application, CM voltage is compared little and is only decayed significantly under high frequency (typically > 100kHZ) with DM voltage.
Also having some passive CM filters that are designed to the switching frequency component of CM voltage is decayed, is significant even the switching frequency component of CM voltage is compared with DM voltage.The main application of these filters is in variable speed electric motors, particularly drives, but they are not widely used.Be difficult to the use of switching frequency CM filter is extended to the application with high earth capacitance or the outside CM circuit of Low ESR.Particular problem is saturated by the caused CM filter inductor of low frequency CM electric current.A kind of method of the CM of solution inductor saturation problem is to use switching frequency and the two CM filter of being decayed of low frequency CM voltage.
The present invention also provides a kind of method of the external source from such as solar panels being regulated to the many aspects of the electric power conversion of utility network for the application having the outside CM circuit of high earth capacitance or Low ESR, comprises the following steps:
Active C M filter apparatus is connected in series between external source power circuit and electric power converter;
Measure the CM electric current that the CM filter inputs or outputs place;
CM electric current based on measured provides active CM electric current to return,
Thus, electric power converter the CM voltage difference between the electric power converter port is regulated and by the CM Current Control at acceptable level.
Active filter can utilize the CM electric current recorded in real time, and provides the real-time control to the CM electric current with CM electric current return path and impedance.The function of active filter is for the AC component of the CM electric current at restriction and control electricity port place.
Active filter can comprise the transformer with secondary winding and a plurality of armature windings.Each armature winding has the equal number of turn.Each power terminal of armature winding and electricity port is connected in series.Secondary winding is connected to active electrical source.
Active filter comprises the measurement relevant to the CM electric current at electricity port place.Active filter comprises by the feedback of described measurement controls active electrical source so that the controlling organization that the CM electric current of port is controlled or limited.
Active filter can comprise extra measurement or the estimation of the CM voltage that the armature winding by the CM transformer is supported.
Controlling organization can be controlled active electrical source so that the CM electric current of port reduces with the feedforward of CM voltage measurement or estimation.
In another form, controlling organization is controlled active electrical source so that the active damping of CM filter to be provided with CM voltage measurement or estimation.
In another form of the present invention, the active filter of connecting with electric power converter can comprise the DC blocking condenser of connecting with the AC electricity port, makes by the series capacitor restriction and controls flowing of DCCM electric current and flowing by active C M filter limits and control AC CM electric current.
The accompanying drawing explanation
Only as explanation, the preferred embodiment of the present invention is described now with reference to accompanying drawing, wherein:
Fig. 1 is the circuit diagram of exemplary voltages source inventer (VSI) circuit;
Fig. 2 is the common-mode voltage figure at DC electricity port place of exemplary voltages source inventer (VSI) circuit;
Fig. 3 is the common-mode voltage figure at DC electricity port place of exemplary voltages source inventer (VSI) circuit, and described common-mode voltage has the value be averaged in each switch periods Ts;
Fig. 4 is the common mode filtering apparatus of first embodiment of the invention and the schematic work block diagram of system;
Fig. 5 is the circuit diagram that uses exemplary voltages source inventer (VSI) circuit of common mode common mode filtering apparatus active filter, second embodiment of the invention and system;
Fig. 6 be have active common mode filter, according to the schematic circuit of the controller of the common mode filtering apparatus of the 3rd execution mode of the present invention and system;
Fig. 7 be have the common-mode voltage feedfoward control, according to the schematic circuit of the controller of the common mode filtering apparatus of the 4th execution mode of the present invention and system;
Fig. 8 be have active damping and common-mode voltage feedfoward control, according to the schematic circuit of the controller of the common mode filtering apparatus of the 5th execution mode of the present invention and system;
Fig. 9 be have active control power supply, according to the circuit diagram of the controller of the common mode filtering apparatus of the 6th execution mode of the present invention and system;
Figure 10 be have the AC component for controlling common mode current the composite type active common mode filter and for the series capacitor of the DC component that intercepts common mode current, according to the schematic circuit of the controller of the common mode filtering apparatus of the 7th execution mode of the present invention and system;
Figure 11 be have for output common mode electric current and voltage have for common mode control the common-mode voltage feedforward of electric current and interior ring controller, according to the schematic circuit of the controller of the common mode filtering apparatus of the 8th execution mode of the present invention and system;
Figure 12 be have the function recorded that uses the CM electric current controller, according to the schematic circuit of the controller of the common mode filtering apparatus of the 9th execution mode of the present invention and system;
Figure 13 be have for the passive low ventilating filter of mains frequency harmonic wave and switching frequency harmonic wave common-mode voltage, according to the schematic circuit of the controller of the common mode filtering apparatus of the tenth execution mode of the present invention and system;
Figure 14 be have the high and low frequency ground voltage of having decayed, according to the schematic circuit of the power inverter with the ground voltage reduced of the common mode filtering apparatus of the 11 execution mode of the present invention and system;
Figure 15 is the schematic circuit had according to the power inverter with the ground voltage reduced of the active common mode filter device of the 12 execution mode of the present invention and system, the effective filter inductance delivery exciting current of this active circuit to increase;
Figure 16 is that the figure of consequent low common-mode voltage inverter CM voltage waveform shows;
Figure 17 is that the figure of the Magnetized Material characteristic of the CM inductor that uses in the execution mode of common mode filtering apparatus according to the present invention and system shows;
Figure 18 is the schematic diagram of active common mode filter device according to the embodiment of the present invention, and it shows CM transformer and the CM filter relative size with respect to electric power converter;
Figure 19 is the schematic diagram of core, bobbin and supporting construction toroidal transformer that the CM transformer is shown, wherein, actual winding is not shown but be located in the groove of bobbin of the CM inductor used in the embodiment of common mode filtering apparatus according to the embodiment of the present invention and system;
Figure 20 A to Figure 20 D shows the various topology views of toroidal transformer of core, bobbin and supporting construction of the CM transformer of Figure 19.
Figure 21 A to Figure 21 D shows each bell structure view of actual coil toroidal transformer of groove of bobbin of CM inductor that actual winding is positioned at the CM transformer of Figure 19.
Figure 22 is the schematic circuit with VSI of series active CM filter.Active C M filter consists of CM transformer (LCM) and CM electric current return path (Cdn, Rdn, Cdna).Figure 22 also illustrates the CM transformer secondary output of controlling the bridge power circuit for being connected to active C M and controls electric current input IDC_CTRL_IN and output IDC_CTRL_OUT and CM current measurement IDC_CM.
Figure 23 is the schematic circuit that CM controls the bridge power circuit.
Embodiment
With reference to the block diagram shown in Fig. 4 and partial circuit figure, it has illustrated common mode filtering apparatus and system in exemplary circuit.This device can be used active common mode filter or passive common mode filters.Electric power converter is shown having the AC electricity port that is connected to the AC utility network and is connected to the DC electricity port of the input port of active C M filter.The output port of active C M filter is connected to external circuit, as power supply or load.
In this form, the common-mode filter that common mode filtering apparatus and system have and electric power converter is in series used to support the common mode voltage difference between the electric power converter port and common mode current is controlled to acceptable level.Electric power converter can be VSI.The common mode current that the common-mode filter utilization records in real time, and provide the real-time control to common mode current with common mode current return path and impedance.
According to the present invention and with reference to the common mode filtering apparatus shown in Fig. 5 to Figure 10 and system 21, described common mode filtering apparatus and system 21 comprise be connected on such as the external circuits such as photovoltaic array 11 and by feeding power to the active filter used between the electric power converter 12 of utility network 13.The power conductor 36 that CM filter apparatus 12 will have the power conductor 35 of armature winding 33 and have an armature winding 34 is connected respectively to the electricity port 25 of electric power converter, and by the common mode current measurement mechanism 41A at CM filter input end mouth 35 places on the electric power converter end of power conductor or at power conductor 31, the common mode current that the current measuring device 41B at CM filter output mouth 37 places at 32 external circuit end place measures the electricity port place limits and controls the AC component of the common mode current at electricity port 25 places, and use the AC component of feedback controller 51 restrictions and control common mode current to adjust controlled voltage source.
The CM transformer has secondary winding 58 and a plurality of armature winding 33,34.Armature winding all has the equal number of turn.Each power terminal of the appended electric power converter port of receiving of armature winding and CM filter is connected in series.Secondary winding is connected to by the directly actuated active control power supply 52 of CM current controller 51.Fig. 4 shows the typical case's enforcement that active control power supply is embodied as to the controlled voltage source 56 with the impedance 57 of series electrical perception.
The CM electric current is measured by the current sensor 41A at input port 35 places of CM filter 21 or the current sensor 41B at output port 37 places.The sensor measurement at the input port place of CM filter is from total CM electric current of the DC port of electric power converter.The sensor measurement at CM filter output mouth place is delivered to total CM electric current of external circuit, and this has got rid of any CM electric current returned via the CM electric current return path in filter.The CM filter apparatus also comprises CM current controller 51, and the feedback of CM current controller 51 application CM current measurements is adjusted active control power supply 56, makes the CM electric current be controlled and limit.
Can find out that common mode filtering apparatus and system 21 provide a kind of method of the external source from such as solar panels being regulated to the many aspects of the electric power conversion of utility network for the application having the outside CM circuit of high earth capacitance or Low ESR, said method comprising the steps of: active C M filter apparatus is connected between external source circuit and electric power converter; Measure the CM electric current of CM filter input end or output; CM electric current based on measured provides active CM electric current to return, and electric power converter is regulated the CM voltage difference between the electric power conversion port and controlled the CM electric current to acceptable level thus.
Can use CM current control structure widely.Recognize that the CM current controller can implement with hardware fully, or implement with the firmware that is associated with programmable hardware device and the combination of hardware.
In order to prevent the saturated of CM transformer, active C M filter can only be decayed to the AC component of CM voltage.Therefore, the CM current measurement typically by high pass filter, processes to extract the AC component.In typical application, the cut-off frequency of high pass filter AC utility network frequency 50% to 300% between.In fact, the CM current sensor is also existed to limit bandwidth.Therefore, the CM current signal is typically measured Idc_cm by bandpass filtering to produce.This filtering can may be implemented together with external circuit by CM current sensor characteristic.
The CM electric current is controlled and is limited in acting as towards null value or less reference of CM current controller.Therefore, recognize that the present invention will be in the situation that exist remarkable precision and linearity error to provide gratifying work in the CM current measurement.
Fig. 6 is the block diagram of exemplary CM current controller.Measured CM electric current compares to produce the CM current error signal by high pass filter, processes and in the summation frame with null value CM current reference.The Idc_cm controller action is in the CM current error signal to produce secondary control current reference Icm_s_ctrl*, and this secondary control current reference Icm_s_ctrl* compares to produce secondary control current error signal with measured secondary control electric current I cm_s_ctrl in the summation frame.The Icm_s_ctrl controller action is used for the control voltage Vcm_s_ctrl of active control power supply with generation in secondary control current error signal.
In Fig. 6 example, controller has the nested rings structure, wherein has the internal controller device for Icm_s_ctrl.This contributes to limit according to the standard of active control power supply the level of Icm_s_ctrl.Yet, recognize that the Idc_cm controller can be used to directly control active control power supply.The two is shown as linear PI controller and not restriction Idc_cm controller and Icm_s_ctrl controller.Recognize that many different linearities or nonlinear Control structure are applicable to this application, and many intermediate variables may be subject to the restriction as Icm_s_ctrl* and Vcm_s_ctrl etc.
But Fig. 7 is the block diagram of the exemplary CM current controller of alternative, the extremely feedforward of active control supply voltage of CM voltage that wherein there is measurement or estimate.The not shown interior ring controller for Icm_s_ctrl of this example, but it can be included in the dynamic characteristic of Idc_cm controller.Measure or estimate the CM voltage Vdc_cm at electric power converter electricity port place according to the understanding to the electric power converter operating state.This CM voltage Vdc_cm is multiplied by feedforward controller and gains to produce feed-forward voltage, this feed-forward voltage is combined to produce active control supply voltage Vcm_s_ctrl with the output of Idc_cm controller in the summation frame.
But Fig. 8 is the block diagram of the exemplary CM current controller of alternative, wherein there is the feedforward of active damping and the CM voltage of CM filter.The not shown interior ring controller for Icm_s_ctrl of this example, but it can be included in the characteristic of Idc_cm controller.Measure or estimate the CM voltage Vdc_cm at electric power converter electricity port place according to the understanding to the electric power converter operating state.This CM voltage Vdc_cm is multiplied by feedforward controller and gains to produce feed-forward voltage, and this feed-forward voltage is combined to produce active control supply voltage Vcm_s_ctrl with the output of Idc_cm controller in the summation frame.In this example, the active damping controller action is used for the non-zero CM current reference of Idc_cm with generation in Vdc_cm.Typically, the active damping controller has the resistive characteristic in the zone of CM filter resonance, on this zone or under the frequency place there is the gain significantly reduced.
Fig. 9 be illustrate exemplary active control power supply block diagram and partial circuit figure.The DC electric power source provides DC voltage Vpsu_ctrl to full-bridge circuit.Active control power-supply controller of electric provides pwm control signal to control output voltage V cm_s_ctrl or output current Icm_s_ctrl with the reference value towards from DC CM current controller to full-bridge.
Figure 10 shows the composite type active C M filter of the AC component had for controlling the CM electric current and for the configuration of the series capacitor of the DC component that intercepts the CM electric current.The AC electricity port of series capacitor Cac_s_series and electric power converter is in series used.Active C M filter is shown as with the DC port of electric power converter and connects.Series capacitor is supported the DC component from the CM voltage of electric power converter.Active C M filter is supported the AC component from the CM voltage of electric power converter.This exemplary configuration is suitable for existing the application of the outside CM circuit of Low ESR.For example, be connected to the solar photovoltaic generation system of AC utility network, wherein positive or negative solar array conductor is connected to ground (the earth).
With reference to Figure 11 and Figure 12, showing common mode filtering apparatus and system can work like this: wherein active filter utilizes the function of the common mode current recorded in real time in every way, and across common mode current return path and impedance and the real-time control to common mode current is provided.
This comprises measures common mode current and applies the concept that feedback reduces the common mode current at filter input end mouth place or output port place.This will cover the wherein function of common mode current and be used as any scheme of feedback variable.In one form, can measure two variablees, one is the voltage (common mode output voltage of filter) across the common mode return path, and another is the common mode current that is delivered to external circuit.Feedback is put on to these two variablees with the voltage source of control controlled source and reduces common mode current.The Proportional Feedback of use to voltage, reason is this integrated value that is actually common mode current.Can use the integral feedback to electric current.Clearly, existence can realize with different correlated variabless many modes of identical effect, but all modes all used common mode current the function recorded concept or input or output the concept of the function recorded of the common mode current of port or voltage at filter.
Figure 11 shows the active filter of the function of the common mode current that utilization records in real time.It should be noted that I
dC_CM_OUTand V
dC_CM_OUTi
dC_CMfunction.Particularly:
l
DC-CM-OUT＝(Z
CM_TOTAL/Z
CM_EXT).l
DC-CM.
V
DC_CM_OUT＝Z
CM_TOTAL·l
DC_CM.
Z
CM_TOTAL＝(1/(1/Z
CM_P+1/Z
CM_N+1/Z
CM_EXT))
The function that Figure 12 shows the common mode current recorded in real time comprises measurement and the FEEDBACK CONTROL to the voltage across the common mode current return path.Common mode filtering apparatus and system are utilized the function recorded of common mode current, and the feedback applied on common mode output voltage and common mode output circuit is provided.
With reference to the block diagram shown in Figure 13 and partial circuit figure, it has illustrated common mode filtering apparatus and system in exemplary circuit.This device is passive common mode filters.Electric power converter is shown as the DC electricity port that has the AC electricity port that is connected to the AC utility network and be connected to the output port of passive CM filter.
In this form, the common-mode filter that common mode filtering apparatus and system have and electric power converter is in series used to support the common mode voltage difference between the electric power converter port and common mode current is controlled to acceptable level.Electric power converter is VSI.Passive common mode filters comprises common mode transformer and the common mode current return path consisted of the electric capacity of the parallel branch with series capacitor and resistor, in order to produce the AC system fundamental frequency that significantly decayed, adds that harmonic wave place and the electric power converter that is associated switching frequency adds the damp type low pass filter of the CM voltage at harmonic wave place.
Figure 14 illustrates passive execution mode, this and Figure 13 equivalence, but simplified a little the CM filter to mean and be shown in further detail electric power converter.Figure 15 is active execution mode, although simplified accompanying drawing and not shown CM current measurement and controller chassis.This and Fig. 5 equivalence, but simplified the CM filter to mean and be shown in further detail electric power converter.The actual measurement waveform that the CM voltage that provided by active C M filter improves (than the CM voltage of VSI in the situation of reactive filter shown in Fig. 2 and Fig. 3-it is theoretical waveform) is provided Figure 16.Figure 17 is the magnetization curve of inductor core.Inductor core shows and keeps the low needed very high magnetic permeability of exciting current.
With reference to Figure 18 and Figure 19, wherein Figure 19 shows the toroidal transformer of the Figure 18 that is formed with the common-mode filter 21 be embedded in typical electrical force transducer 12.The main visible parts of CM filter are the CM transformers, and it is illustrated with structural form in Figure 20 A to 20D.
Figure 18 has specifically illustrated the relative size of CM filter than electric power converter, and this is a basic advantage of native system.Figure 19 and Figure 20 A to 20D show core, bobbin and the supporting construction of CM transformer.Show actual winding in the groove of Figure 19 A to Figure 19 D coil frame.This is the toroidal transformer structure, but other type also can be used to form common-mode inductor.
Common mode inductance is that the inductive element that is arranged with a plurality of windings makes the variation of magnetic flux in core generate the voltage of identical polar in each winding.Typical common mode inductance has very strong coupling between winding, and typical common mode inductance is similar to wherein and compares with the rated current of winding the voltage transformer that exciting current is less.Use to common mode transformer shows that this equipment is mainly as voltage transformer work.The CM transformer must be designed to support switching frequency and low frequency CM voltage the two and not there will be saturated or overheated.Similarly, the magnetizing inductance of CM transformer must be wide enough so that in the capacity of peak excitation electric current in active control power supply.
Exemplary CM transformer standard
50kVA solar energy electrical network connects the DC side common mode main inductance of inverter.
DC side common mode main inductance is between GCI stepup transformer and inverter stage.The AC component of the common-mode voltage that its support is produced by inverter stage.Common-mode voltage comprises the remarkable component at the triple-frequency harmonics place of line frequency.Also there is the remarkable component at inverter switching frequency and harmonic wave place.
The major function of DC side CM main inductance is: when the DC lateral load be reference or while having significant direct-to-ground capacitance as the situation of large-sized solar array, stop the AC component of ground loop current.(the DC component that stops the ground loop current by the control inverter translation type.) this design make inverter can be in AC side and DC side the two be all reference.(DC side ground is with reference to approaching DC busbar voltage mid point, unless DC intercepts the AC side that electric capacity also is arranged on inverter.）
DC side CM main inductor comprises 3 windings.There are two main windings just negative with DC for DC.Also exist and control winding, it is driven by external control circuit, makes most of inductor exciting current flow in controlling winding.The method allows DC side CM filter to use compare with originally essential inductance value and capacitance little inductance value and capacitance.In this design, control winding and driven by low voltage circuit, so have significant turn ratio ndc_cm between main winding and control winding.
Inductor magnetic field is by line frequency triple-frequency harmonics domination, but also has other line frequency triple-frequency harmonics place and first-harmonic and harmonic wave switching frequency place remarkable component.The inductor core design needs to solve significant switching frequency component.For the restriction inductor, loss is also important with the higher power conversion efficiency of realization for this.
Electrical code comprises:
Configuration: 1 coupling inductor has 2 main windings and the control winding in the common mode configuration that equate the number of turn in common mode configuration.Main winding and the turn ratio of controlling between winding are n
dc_cm: n
dc_cm: 1.
Main winding and control umber of turn ratio, n
dc_cm:>=ceil ((3.V
dc_max)/(4.V
ctrl_min))=28
The main winding self-induction,
l dccm
:>=Δ Ψ
max/ (2. √ 2.1
ctrl_max/ n
dc_cm)=0.00826.n
dc_cm
In the case, inductance is defined as Ψ
max_peak,/ I
cm_max, with " integrated value " rather than the increment size of inductance that provides inductance.Key is that the lower bound of inductance can be applied and limit weber by control electric current and maximum by maximum.Suppose that the peak value magnetic linkage is corresponding with the AC change in magnetic flux density of balance.
Inductor must meet all manufacturing tolerances of this standard.
The main winding leakage inductance, L
dc_cm_lk:≤0.02*L
dc_cm
Inductor must meet all manufacturing tolerances of this standard.
Control the winding leakage inductance, L
dc_cm_ctrl_lk:≤0.02*/n
dc_cm 2l
dc_cm
Main winding rated current: 80ADC
(without remarkable line frequency or switching frequency harmonic current)
Control the winding rated current: 8Arms(line frequency triple-frequency harmonics)
This comprises other line frequency triple harmonic current and switching frequency electric current in a small amount.Can from inductor voltage, self-induction and the turn ratio of regulation, derive accurate control winding current.
Nominal switching frequency: 15kHZ
Design should be allowed the switching frequency (the fundamental current level of will be limited in<rated current of the work on 20kHZ 25%) in 10kHZ to 30kHZ scope.
Inductor voltage :≤300Vrms(summation)
Inductor voltage has triple-frequency harmonics place and switching frequency and the harmonic wave place that is associated the remarkable component of line frequency.Exact value depends on the some factors that comprise AC side and DC side voltage.Generally speaking, total line frequency voltage increases and increases along with AC side voltage.Total root mean square switching frequency voltage increases along with DC side voltage and increases and along with AC side voltage reduces and reduces.Provided the selection of result in table 1 and table 2.Under worst condition, these are 800V DC side voltage.Result shows root-mean-square value and each line frequency harmonic number N of total line frequency voltage
fLthe root-mean-square value at place.Give root-mean-square value and each switching frequency harmonic number N of total switching frequency voltage
fsthe root-mean-square value at place.
| V AC_PN | Summation | N Fl=3 | N Fl=9 | N Fl=15 |
| 200（50HZ） | 43 | 42 | 4.7 | 2.0 |
| 231（50HZ） | 49 | 48 | 5.2 | 2.1 |
| 305（60HZ） | 64 | 63 | 6.2 | 2.7 |
The line frequency voltage at the some AC side operating voltages of table 1 place
The switching frequency voltage at the some AC side operating voltages of table 2 place
The maximum magnetic linkage occurred is changed to Δ Ψ
max=0.187Vs.
This is the two the stack of line frequency value and switching frequency value.Set up common-mode inductor voltage with controllable rate, make and can suppose and Δ Ψ
maxthe corresponding core magnetic flux amplitude of oscillation is balance near zero.Common-mode inductor should be designed to support start not enter until the magnetic linkage of 0.1Vs changes zone of saturation from the core of zero magnetic flux density.For example, the magnetic linkage amplitude of oscillation of 0.1Vs should not make the initial core without magnetic flux of vertical annealed glass metal 2605SA1 surpass the magnetic flux density of 1.4T.
Maximum power loss: 125@75ADC, 25C cooling-air
Stray magnetic field problem: should make to minimize to prevent stray magnetic field loss and interference from the stray flux of inductor.The inductor substrate directly can be mounted to steel plate.Inductor should be designed to make the stray magnetic field loss in this plate to minimize.(note: except this steel plate, without ferrous material, will be used in the 20mm of inductor core.）
Between winding, insulate: 1000VDC is continuous, 2500V(DC, 50HZ or 60HZ) 1 minute
Insulation against ground: 1000VDC is continuous, 2500(DC, 50HZ or 60HZ) 1 minute
It is continuous that the insulation against ground of control winding should be defined as 600V
Cooling air temperature :-20C to 50C
Cooling air delivery:>0.005m
3s
-1
Cooling rate:>0.005ms
-1
Provide exemplary design for your guidance.This is high-level design, does not comprise the full details of installing and stopping.This exemplary design is not in the situation that with magnetometric analysis software and/or verify that the further work of the key parameters such as inductance, leakage inductance and loss should do not used by potential supplier.In the situation that this extra work not, exemplary design may not meet standard.
Exemplary CM transformer is implemented
With reference to Figure 17, Figure 18 A to Figure 18 D and Figure 19 A to Figure 19 D, a kind of form of such common-mode inductor has following characteristic:
Inductance: under peak flux density 1.2T, 150HZ according to L
cm(B)=N.B.A ,/l
cm(B) while defining, L
cm=0.61H ± 25%
Inductance: under peak flux density 50mT, 10kHZ according to L
cm(B)=N.B.A ,/l
cm(B) while defining, L
cm=0.034H ± 25%
Core: customization metal glass parts
Shape: the toroidal cores in plastic housing
In-core footpath: 90.0mm
Core external diameter: 185mm
The core degree of depth: 60.0mm
Shell internal diameter: inboard 85.5mm, outside 81.5mm
Shell external diameter: inboard 192.omm, outside 197.0mm
The shell degree of depth: inboard 62mm, the radius 5.5mm at outside 72mm(OD and ID edge)
Core material: the metal glass 2605SA1 of longitudinal magnetic field annealing
Shell material: the plastics with working temperature >=180C
Air gap: nothing
Winding 1: 30 circles on a side of approximately+10 ° to+170 ° of the angle of coverage of core
Coil has 4 layers that are connected in parallel.Each layer has 30 circle 10AWG and repaints copper-clad circle electromagnetic wire (UL180 level, for example MW30).(typical conductor diameter=2.59mm.Typical case overall diameter≤2.69mm.）
Wire is equally spaced on every one deck.In order to keep conductor spacing, by the groove in the plastic housing end face of core, ground floor is alignd with the second layer.
Winding is fixed to the point on the plastic housing of core by frenulum.
Winding 2: the same with winding 1, except the angle of coverage at core-10 ° to the opposite side of-170 °.
Winding direction is set to produce common-mode inductor.
Winding 3:1 circle 16AWG insulated copper wire.There is the unsettled lead-in wire of 500mm.
Insulation rating=600V when 180C.For example, PTFE(polytetrafluoroethylene) insulation UL1213 line.
Insulation: UL grade 180C
Winding: the wire coating is enough to meet turn-to-turn insulation and layer insulation.
The outside (packing): winding 1 and winding 2 bring last processing by least 2 layers of glass fibre.
The lead-in wire stopped: fiberglass pipe.
Between winding.Between two windings, spacer is integrated in the plastic core shell.These are to extend to the high head face hump part of 9mm of the external diameter of 106mm from the internal diameter of 25mm.Each sept covers the radian of 10 °.
Install: core is arranged in the U-shaped support connected via the M6 screwed hole in spacer between winding with vertical stratification.
Finally processing: varnish is machined to UL grade 180C.Cover up or eliminate termination.
With reference to Figure 22 and Figure 23, can find out that diagram shows the part of whole system separately.Figure 22 is the functional circuit figure of electric power converter and series active CM filter, and Figure 23 is the detailed circuit diagram of active electrical source.Interface on every width figure is not aimed at fully and is described by different titles each other; but can be understood that; this two width figure links from active electrical source to series active power filter CM transformer secondary output winding, to provide secondary CM to control electric current I CM_S_CTRL by this interface, and those skilled in the art is to be understood that such interface in order to understand disclosed herein and claimed invention.
Figure 22 and Figure 23 show the partial circuit figure of VSI and series active CM filter.With reference to Figure 22, the CM electric current return path that active C M filter comprises CM transformer part title LCM and formed by component names Cdn, Rdn and Cdna.The DC electricity port of CM primary winding and VSI is connected in series.Figure 22 shows the CM current measurement IDC_CM of output place of CM active filter.
Figure 22 also shows CM transformer secondary output control current input terminal IDC_CTRL_IN and the output IDC_CTRL_OUT that is shown as the active C M control bridge power circuit of connector DC CM CTRL at Figure 23 for being connected to.This interface provides secondary CM to control electric current I CM_S_CTRL from active electrical source to series active power filter CM secondary winding.The full-bridge controlled voltage source is realized with electric power integration electric current U11 and associated components.Series electrical perception for element parts L5, L6 and L7 realize.The ICM_S_CTRL current measurement is provided by parts CS1.ICM_S_CTRL measurement, full-bridge controlled voltage source PWM control and status signal are connected to the numerical control system (not shown) at connector CONTROL BRD place.Numerical control system also receives IDC_CM measuring-signal and other measurement of correlation.Numerical control system execution feedback and feedforward control scheme are to limit and to control IDC_CM.
Although we have described the embodiment of common mode filtering apparatus and system in this article, it is also contemplated that, other execution mode of the present invention can be showed the combination of aforementioned feature and any one in aforementioned feature of arbitrary number.One of skill in the art will appreciate that: without departing from the present invention, can carry out various modifications and change to the embodiment of illustration.All such modifications and change are intended to fall within the scope of the present invention.
Particularly, above-mentioned application is the active C M filter of electric power converter and series connection to be connected to the application of utility network.Yet other application comprises the application that electric power converter and series active CM filter is connected to the solar-energy photo-voltaic cell array.In addition, it comprises the CM filter is connected to the application between two electric power converters of the uninterrupted supply of electric power UPS of two conversion.More application comprise that the support of active CM filter compares the CM voltage AC component at harmonic wave place of the utility network frequency at level of signifiance place with utility network DM voltage.Obviously, those skilled in the art will see that these are reached to the above class Sihe carried out of applying significantly changes and fall within the scope of the present invention.
In addition, may there is structural specific change.For example, active filter of the present invention can comprise providing the CM return circuit of the impedance with restriction to make the CM electric current at electricity port place turn back to the parts of electric power converter after through the CM transformer.It is mainly capacitive impedance that these CM return circuit parts can have.
Yet, in should be appreciated that in any variation that can carry out without departing from the spirit and scope of the present invention and revising and all to be included in as scope of the present invention defined in the appended claims.
Claims (according to the modification of the 19th of treaty)
1. common mode filtering apparatus and a system of being regulated for the many aspects of the conversion of the electric power from the external source such as solar panels to another external circuit to being undertaken by electric power converter, wherein, significantly the decayed switching frequency of described electric power converter of described common mode filtering apparatus adds the common-mode voltage at harmonic wave place.
2. common mode filtering apparatus according to claim 1 and system, wherein, described electric power converter is single-phase.
3. common mode filtering apparatus according to claim 1 and system, wherein, described electric power converter is heterogeneous.
4. common mode filtering apparatus according to claim 1 and system, for the external source from such as solar panels is regulated to the many aspects of the electric power conversion of the AC system such as utility network, wherein, the described common mode filtering apparatus described AC system fundamental frequency that significantly decayed adds that harmonic wave place and the described electric power converter that is associated switching frequency adds the common-mode voltage at harmonic wave place.
5. according to the described common mode filtering apparatus of any one in claim 1 to 4 and system, wherein, described common mode filtering apparatus includes the source filter configuration.
6. according to the described common mode filtering apparatus of any one in claim 1 to 4 and system, wherein, described common mode filtering apparatus comprises the passive filter configuration.
7. according to the described common mode filtering apparatus of any one in claim 1 to 5 and system, wherein, the active common mode filter provided by the common mode transformer with a plurality of armature windings (common-mode inductor) is provided for described common mode filtering apparatus and system.
8. common mode filtering apparatus according to claim 7 and system, wherein, each power terminal that described armature winding all has the equal number of turn and each armature winding and electricity port is connected in series.
9. according to the described common mode filtering apparatus of claim 7 or 8 and system, wherein, active common mode filter also comprises secondary winding.
10. common mode filtering apparatus according to claim 9 and system, wherein, in one form, described active common mode filter comprises the control power supply that is coupled to described secondary winding.
11. common mode filtering apparatus according to claim 10 and system, wherein, control power supply and consist of the controlled voltage source of connecting with inductive impedance.
12. common mode filtering apparatus according to claim 7 and system, wherein, described common mode filtering apparatus comprises the inductive impedance in 25% to 200% scope of the common mode transformer magnetizing inductance that is in described secondary winding place and records at the switching frequency place of the described electric power converter be associated.
13., according to the described common mode filtering apparatus of any one in aforementioned claim and system, have and common-mode filter that electric power converter is connected in series to support the common mode voltage difference between described electric power converter port and common mode current is controlled to acceptable level.
14. common mode filtering apparatus according to claim 13 and system, wherein, described common-mode filter is active filter.
15. common mode filtering apparatus according to claim 13 and system, wherein, described common-mode filter is passive filter.
16. common mode filtering apparatus according to claim 13 and system, wherein, described electric power converter is voltage source inverter.
17. common mode filtering apparatus according to claim 13 and system, wherein, the function of the common mode current that described active filter utilization records in real time, and across common mode current return path and impedance and the real-time control to common mode current is provided.
18. common mode filtering apparatus according to claim 17 and system, wherein, the described function of the common mode current recorded in real time comprises measurement and the FEEDBACK CONTROL to the voltage across described common mode current return path.
19. common mode filtering apparatus according to claim 13 and system, wherein, the common mode current that described active filter utilization records in real time, and provide the real-time control to common mode current with common mode current return path and impedance.
20. common mode filtering apparatus according to claim 13 and system, wherein, described common-mode filter comprises common mode transformer and one or more common mode current return circuit, and described one or more common mode current return circuits are connected between second power conductor at first power conductor at described electric power converter and described external circuit, described CM filter output mouth place or described common-mode filter output port place.
21. common mode filtering apparatus according to claim 20 and system, wherein, described active filter comprises the active electrical source of the secondary winding that is coupled to described common mode transformer.
22., according to the described common mode filtering apparatus of claim 20 or 21 and system, wherein, described active filter comprises the active electrical source consisted of the controlled voltage source of connecting with inductive impedance.
23. common mode filtering apparatus according to claim 22 and system, wherein, described series impedance is mainly inductive impedance.
24. common mode filtering apparatus according to claim 23 and system, wherein, described inductive impedance be in described secondary winding place and 25% to 200% scope of the common mode transformer magnetizing inductance that records at the switching frequency place of the described electric power converter be associated in.
25., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, having is the controllable voltage source with full-bridge of pulse width modulation (PWM).
26., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, having is the controllable voltage source with half-bridge of pulse width modulation (PWM).
27., according to the described common mode filtering apparatus of claim 25 or 26 and system, wherein, the described controllable voltage source PWM cycle changes and synchronizes with the switch of the described electric power converter be associated.
28., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, wherein, described common mode transformer has the magnetizing inductance in armature winding place and 0.1H to the 10H scope that records at utility network frequency place.
29., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, wherein, described common mode transformer has the core of being made by amorphous metal (metal glass).
30. common mode filtering apparatus according to claim 13 and system, wherein, described common mode filtering apparatus and system are for being used to the electric power converter of transfer electrical power between circuit, wherein each circuit is connected to the different electricity port of described electric power converter, and each electricity port has at least two power conductors, wherein electricity port voltage is characterized by differential mode (DM) voltage and common mode (CM) voltage, wherein, described DM voltage is the electrical potential difference between paired power conductor, and described common-mode voltage is all described power conductors and such as the average potential difference between the reference potential of ground (the earth), and the electricity port electric current is characterized by DM electric current and common mode current, wherein said DM electric current is poor between the electric current in paired power conductor, and described common mode current is that the external circuit via typically comprising ground (the earth) conductor on all power conductors flow back into the electric current sum in one or more other electricity port of described electric power converter,
A. wherein, described common mode filtering apparatus and system comprise the active filter of AC component that in series uses to limit and control the common mode current at described electricity port place with the electricity port of described electric power converter;
B. and wherein, measure the function of the common mode current at described electricity port place, and the AC component that uses the feedback controller restriction and control common mode current is controlled to adjust described active filter.
31. according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, wherein, saturated by switching frequency and the two common-mode filter of being decayed of low frequency common-mode voltage are controlled to common mode transformer.
32. a common mode filtering apparatus and system, wherein, the active filter of described common mode filtering apparatus and system has the transformer that contains secondary winding and a plurality of armature windings; Each power terminal that described armature winding has the equal number of turn and each armature winding and electricity port is connected in series; And described secondary winding is connected to controlled voltage source via impedance, wherein, the invention process, to switching frequency and the two active filter of being decayed of low frequency common-mode voltage, is significant even they are compared with DM voltage.
33. common mode filtering apparatus according to claim 32 and system are wherein, saturated by switching frequency and the two common-mode filter of being decayed of low frequency common-mode voltage are controlled to common mode transformer.
34. common mode filtering apparatus according to claim 32 and system, wherein, in one form, measure the common mode current at described electricity port place, uses the AC component of feedback controller restriction and control common mode current to adjust active control power supply.
35. common mode filtering apparatus according to claim 33 and system, wherein, the function of the common mode current that described active filter utilization records in real time, and across common mode current return path and impedance and the real-time control to common mode current is provided.
36. common mode filtering apparatus according to claim 33 and system, wherein, the function of the common mode current recorded in real time comprises the measurement of the voltage across the common mode current return path and FEEDBACK CONTROL.
37. common mode filtering apparatus according to claim 32 and system, wherein, the estimation of the common-mode voltage at electric power converter electricity port place or measurement are used to provide the feedfoward control to active control power supply, with the AC component of the common mode current that reduces the frequency place on the bandwidth of closed loop common mode current controller, comprise the AC component of the common mode current at electric power converter switching frequency and harmonic wave place.
38. common mode filtering apparatus according to claim 32 and system, wherein, obtain the active damping of common-mode filter response by the suitable closed-loop dynamic characteristic in the common mode current feedback controller.
39. common mode filtering apparatus according to claim 32 and system, wherein, provide circuit the common mode current of the output from common mode transformer to be turned back to one or more other electricity port of described electric power converter.
40., according to the described common mode filtering apparatus of claim 37 and system, wherein, this circuit comprises at least one series electrical capacitive impedance.
41. common mode filtering apparatus according to claim 32 and system, wherein, turn back to other electricity port of described electric power converter from the common mode current of the output of common mode transformer via the external circuit such as insulation electric capacity.
42. common mode filtering apparatus according to claim 32 and system, wherein, except active control forces most of common mode transformer exciting current flows in secondary control winding rather than in armature winding, disclosed described active filter be operated in the conceptive work that is similar to passive common mode filters, wherein, the effective impedance of common mode transformer is far above the effective impedance of passive common mode transformer, choke or the inductor of equal size.
43. common mode filtering apparatus according to claim 32 and system, wherein, common-mode filter connects with electric power converter support the common mode voltage difference between the electric power converter port and common mode current is controlled to acceptable level.
44. a method of by common mode filtering apparatus and system, the external source from such as solar panels being regulated to the many aspects of the electric power conversion of utility network in the application with the outside common-mode circuit of high earth capacitance or Low ESR comprises the following steps:
A. the active common mode filter device is connected in series between external source power circuit and electric power converter;
B. measure the function that common-mode filter inputs or outputs the common mode current at place;
C. the common mode current based on measured provides active common mode current to return,
Wherein, described electric power converter is regulated the common mode voltage difference between the electric power converter port and described common mode current is controlled to acceptable level.
45. according to the method for claim 44 described use common mode filtering apparatus and system, wherein, the function of the common mode current that described active filter utilization records in real time, and across common mode current return path and impedance and the real-time control to common mode current is provided.
46., according to the described common mode filtering apparatus of claim 44 and system, wherein, the function of the common mode current recorded in real time comprises the measurement of the voltage across the common mode current return path and FEEDBACK CONTROL.
47. the method according to claim 44 described use common mode filtering apparatus and system, wherein, the common mode current that described active filter utilization records in real time, and provide the real-time control to common mode current with common mode current return path and impedance, wherein, the AC component of the common mode current at described active filter restriction and control electricity port place.
48. the method according to the described use common mode filtering apparatus of any one in claim 44 to 47 and system, wherein, described active filter comprises the common mode transformer with secondary winding and a plurality of armature windings, each power terminal that wherein each armature winding has the equal number of turn and each armature winding and an electricity port is connected in series, and described secondary winding is connected to active electrical source.
49. the method according to claim 48 described use common mode filtering apparatus and system, wherein, described active filter comprises the measurement relevant to the common mode current at described electricity port place, wherein, described active filter comprises by the feedback of described measurement and controls described active electrical source so that the controlling organization that the described common mode current of described port is controlled or limited.
50., according to the method for claim 48 described use common mode filtering apparatus and system, wherein, described active filter comprises extra measurement or the estimation of the common-mode voltage of being supported by the described armature winding of described common mode transformer.
51., according to the method for claim 48 described use common mode filtering apparatus and system, wherein, described controlling organization measures with common-mode voltage or the feedforward of estimation is controlled described active electrical source so that the common mode current of described port reduces.
52., according to the method for claim 48 described use common mode filtering apparatus and system, wherein, described controlling organization measures with common-mode voltage or estimation is controlled described active electrical source so that the active damping of described common-mode filter to be provided.
53. the method according to claim 44 described use common mode filtering apparatus and system, wherein, described active filter is connected with electric power converter and is comprised the DC blocking condenser of connecting with the AC electricity port, makes by described series capacitor restriction and controls flowing of DC common mode current and flowing by described active common mode filter restriction and control AC common mode current.
54. basically as in specification with reference to example and the described common mode filtering apparatus of accompanying drawing and system.
55. basically as in specification with reference to the method for example and accompanying drawing described use common mode filtering apparatus and system.
56. common mode (CM) filter apparatus and a system of the external source from such as solar panels being regulated to the many aspects of the electric power conversion of utility network for the application having the outside common-mode circuit of high earth capacitance or Low ESR comprises:
A. common mode filtering apparatus, described common mode filtering apparatus is connected in series between external source power circuit and electric power converter, described common mode filtering apparatus comprises that the common mode such as common mode transformer that is connected between common-mode filter input port and output port intercepts impedance and returns to impedance from the common mode current that filter outputs to described electric power converter, thereby form the common mode low pass filter
B. wherein, on filter cutoff frequency, described obstruct impedance is greater than describedly returns to impedance and described common-mode filter provides significant voltage attenuation;
Wherein, significantly decayed interchange (AC) system fundamental frequency of described common mode filtering apparatus adds that harmonic wave place and the described electric power converter that is associated switching frequency adds the common-mode voltage at harmonic wave place.
57. one kind for the controller according to the described common mode filtering apparatus of claim 56 and system, wherein, described common mode filtering apparatus is the passive low ventilating filter for mains frequency harmonic wave and switching frequency harmonic wave common-mode voltage are carried out to filtering.
58., according to the described controller for common mode filtering apparatus and system of claim 57, wherein, described filter provides being less than common-mode voltage on the cut-off frequency of about 2 times of mains frequencies and the significantly decay of electric current.
59., according to the described controller for common mode filtering apparatus and system of claim 58, wherein, passive low ventilating filter provides the significantly decay of the common-mode voltage in 1HZ to 100HZ scope and electric current basically.
60. according to the described controller for common mode filtering apparatus and system of claim 59, wherein, described electric power converter is that voltage source inverter (VSI) and described passive common mode filters comprise common mode transformer and the common mode current return path consisted of the electric capacity of the parallel branch with series capacitor and resistor, in order to produce the AC system fundamental frequency that significantly decayed, adds that harmonic wave place and the described electric power converter that is associated switching frequency adds the damp type low pass filter of the CM voltage at harmonic wave place.
61. one kind for the controller according to the described common mode filtering apparatus of claim 56 and system, wherein, the CM current measurement typically by high pass filter, processes to extract the AC component, the cut-off frequency of wherein said high pass filter AC utility network frequency 50% to 300% between.
Claims (55)
1. common mode filtering apparatus and a system of being regulated for the many aspects of the conversion of the electric power from the external source such as solar panels to another external circuit to being undertaken by electric power converter, wherein, significantly the decayed switching frequency of described electric power converter of described common mode filtering apparatus adds the common-mode voltage at harmonic wave place.
2. common mode filtering apparatus according to claim 1 and system, wherein, described electric power converter is single-phase.
3. common mode filtering apparatus according to claim 1 and system, wherein, described electric power converter is heterogeneous.
4. common mode filtering apparatus according to claim 1 and system, for the external source from such as solar panels is regulated to the many aspects of the electric power conversion of the AC system such as utility network, wherein, the described common mode filtering apparatus described AC system fundamental frequency that significantly decayed adds that harmonic wave place and the described electric power converter that is associated switching frequency adds the common-mode voltage at harmonic wave place.
5. according to the described common mode filtering apparatus of any one in claim 1 to 4 and system, wherein, described common mode filtering apparatus includes the source filter configuration.
6. according to the described common mode filtering apparatus of any one in claim 1 to 4 and system, wherein, described common mode filtering apparatus comprises the passive filter configuration.
7. according to the described common mode filtering apparatus of any one in claim 1 to 5 and system, wherein, the active common mode filter provided by the common mode transformer with a plurality of armature windings (common-mode inductor) is provided for described common mode filtering apparatus and system.
8. common mode filtering apparatus according to claim 7 and system, wherein, each power terminal that described armature winding all has the equal number of turn and each armature winding and electricity port is connected in series.
9. according to the described common mode filtering apparatus of claim 7 or 8 and system, wherein, active common mode filter also comprises secondary winding.
10. common mode filtering apparatus according to claim 9 and system, wherein, in one form, described active common mode filter comprises the control power supply that is coupled to described secondary winding.
11. common mode filtering apparatus according to claim 10 and system, wherein, control power supply and consist of the controlled voltage source of connecting with inductive impedance.
12. common mode filtering apparatus according to claim 11 and system, wherein, described control supply unit comprises the series electrical perception impedance in 25% to 200% scope of the common mode transformer magnetizing inductance that is in described secondary winding place and records at the switching frequency place of the described electric power converter be associated.
13., according to the described common mode filtering apparatus of any one in aforementioned claim and system, have and common-mode filter that electric power converter is connected in series to support the common mode voltage difference between described electric power converter port and common mode current is controlled to acceptable level.
14. common mode filtering apparatus according to claim 13 and system, wherein, described common-mode filter is active filter.
15. common mode filtering apparatus according to claim 13 and system, wherein, described common-mode filter is passive filter.
16. common mode filtering apparatus according to claim 13 and system, wherein, described electric power converter is voltage source inverter.
17. common mode filtering apparatus according to claim 13 and system, wherein, the function of the common mode current that described active filter utilization records in real time, and across common mode current return path and impedance and the real-time control to common mode current is provided.
18. common mode filtering apparatus according to claim 17 and system, wherein, the described function of the common mode current recorded in real time comprises measurement and the FEEDBACK CONTROL to the voltage across described common mode current return path.
19. common mode filtering apparatus according to claim 13 and system, wherein, the common mode current that described active filter utilization records in real time, and provide the real-time control to common mode current with common mode current return path and impedance.
20. common mode filtering apparatus according to claim 13 and system, wherein, described common-mode filter comprises common mode transformer and one or more common mode current return circuit, and described one or more common mode current return circuits are connected between second power conductor at first power conductor at described electric power converter and described external circuit, described CM filter output mouth place or described common-mode filter output port place.
21. common mode filtering apparatus according to claim 20 and system, wherein, described active filter comprises the active electrical source of the secondary winding that is coupled to described common mode transformer.
22., according to the described common mode filtering apparatus of claim 20 or 21 and system, wherein, described active filter comprises the active electrical source consisted of the controlled voltage source of connecting with inductive impedance.
23. common mode filtering apparatus according to claim 22 and system, wherein, described series impedance is mainly inductive impedance.
24. common mode filtering apparatus according to claim 23 and system, wherein, the impedance of the described series electrical of described active electrical source perception be in described secondary winding place and 25% to 200% scope of the common mode transformer magnetizing inductance that records at the switching frequency place of the described electric power converter be associated in.
25., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, having is the controllable voltage source with full-bridge of pulse width modulation (PWM).
26., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, having is the controllable voltage source with half-bridge of pulse width modulation (PWM).
27., according to the described common mode filtering apparatus of claim 25 or 26 and system, wherein, the described controllable voltage source PWM cycle changes and synchronizes with the switch of the described electric power converter be associated.
28., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, wherein, described common mode transformer has the magnetizing inductance in armature winding place and 0.1H to the 10H scope that records at utility network frequency place.
29., according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, wherein, described common mode transformer has the core of being made by amorphous metal (metal glass) or nanocrystalline metal.
30. common mode filtering apparatus according to claim 13 and system, wherein, described common mode filtering apparatus and system are for being used to the electric power converter of transfer electrical power between circuit, wherein each circuit is connected to the different electricity port of described electric power converter, and each electricity port has at least two power conductors, wherein electricity port voltage is characterized by differential mode (DM) voltage and common mode (CM) voltage, wherein, described DM voltage is the electrical potential difference between paired power conductor, and described common-mode voltage is all described power conductors and such as the average potential difference between the reference potential of ground (the earth), and the electricity port electric current is characterized by DM electric current and common mode current, wherein said DM electric current is poor between the electric current in paired power conductor, and described common mode current is that the external circuit via typically comprising ground (the earth) conductor on all power conductors flow back into the electric current sum in one or more other electricity port of described electric power converter,
A. wherein, described common mode filtering apparatus and system comprise the active filter of AC component that in series uses to limit and control the common mode current at described electricity port place with the electricity port of described electric power converter;
B. and wherein, measure the function of the common mode current at described electricity port place, and the AC component that uses the feedback controller restriction and control common mode current is controlled to adjust described active filter.
31. according to the described common mode filtering apparatus of any one in claim 20 to 24 and system, wherein, saturated by switching frequency and the two common-mode filter of being decayed of low frequency common-mode voltage are controlled to common mode transformer.
32. a common mode filtering apparatus and system, wherein, the active filter of described common mode filtering apparatus and system has the transformer that contains secondary winding and a plurality of armature windings; Each power terminal that described armature winding has the equal number of turn and each armature winding and electricity port is connected in series; And described secondary winding is connected to controlled voltage source via impedance, wherein, the invention process, to switching frequency and the two active filter of being decayed of low frequency common-mode voltage, is significant even they are compared with DM voltage.
33. common mode filtering apparatus according to claim 32 and system are wherein, saturated by switching frequency and the two common-mode filter of being decayed of low frequency common-mode voltage are controlled to common mode transformer.
34. common mode filtering apparatus according to claim 32 and system, wherein, in one form, measure the common mode current at described electricity port place, uses the AC component of feedback controller restriction and control common mode current to adjust active control power supply.
35. common mode filtering apparatus according to claim 32 and system, wherein, the function of the common mode current that described active filter utilization records in real time, and across common mode current return path and impedance and the real-time control to common mode current is provided.
36. common mode filtering apparatus according to claim 32 and system, wherein, the function of the common mode current recorded in real time comprises the measurement of the voltage across the common mode current return path and FEEDBACK CONTROL.
37. common mode filtering apparatus according to claim 32 and system, wherein, the estimation of the common-mode voltage at electric power converter electricity port place or measurement are used to provide the feedfoward control to active control power supply, with the AC component of the common mode current that reduces the frequency place on the bandwidth of closed loop common mode current controller, comprise the AC component of the common mode current at electric power converter switching frequency and harmonic wave place.
38. common mode filtering apparatus according to claim 32 and system, wherein, obtain the active damping of common-mode filter response by the suitable closed-loop dynamic characteristic in the common mode current feedback controller.
39. common mode filtering apparatus according to claim 32 and system, wherein, provide circuit the common mode current of the output from common mode transformer to be turned back to one or more other electricity port of described electric power converter.
40., according to the described common mode filtering apparatus of claim 39 and system, wherein, this circuit comprises at least one series electrical capacitive impedance.
41. common mode filtering apparatus according to claim 32 and system, wherein, turn back to other electricity port of described electric power converter from the common mode current of the output of common mode transformer via the external circuit such as insulation electric capacity.
42. common mode filtering apparatus according to claim 32 and system, wherein, except active control forces most of common mode transformer exciting current flows in secondary control winding rather than in armature winding, disclosed described active filter be operated in the conceptive work that is similar to passive common mode filters, wherein, the effective impedance of common mode transformer is far above the effective impedance of passive common mode transformer, choke or the inductor of equal size.
43. common mode filtering apparatus according to claim 32 and system, wherein, common-mode filter connects with electric power converter support the common mode voltage difference between the electric power converter port and common mode current is controlled to acceptable level.
44. a method of by common mode filtering apparatus and system, the external source from such as solar panels being regulated to the many aspects of the electric power conversion of utility network in the application with the outside common-mode circuit of high earth capacitance or Low ESR comprises the following steps:
A. the active common mode filter device is connected in series between external source power circuit and electric power converter;
B. measure the function that common-mode filter inputs or outputs the common mode current at place;
C. the common mode current based on measured provides active common mode current to return,
Wherein, described electric power converter is regulated the common mode voltage difference between the electric power converter port and described common mode current is controlled to acceptable level.
45. according to the method for claim 44 described use common mode filtering apparatus and system, wherein, the function of the common mode current that described active filter utilization records in real time, and across common mode current return path and impedance and the real-time control to common mode current is provided.
46., according to the described common mode filtering apparatus of claim 44 and system, wherein, the function of the common mode current recorded in real time comprises the measurement of the voltage across the common mode current return path and FEEDBACK CONTROL.
47. the method according to claim 44 described use common mode filtering apparatus and system, wherein, the common mode current that described active filter utilization records in real time, and provide the real-time control to common mode current with common mode current return path and impedance, wherein, the AC component of the common mode current at described active filter restriction and control electricity port place.
48. the method according to the described use common mode filtering apparatus of any one in claim 44 to 47 and system, wherein, described active filter comprises the common mode transformer with secondary winding and a plurality of armature windings, each power terminal that wherein each armature winding has the equal number of turn and each armature winding and an electricity port is connected in series, and described secondary winding is connected to active electrical source.
49. the method according to claim 48 described use common mode filtering apparatus and system, wherein, described active filter comprises the measurement relevant to the common mode current at described electricity port place, wherein, described active filter comprises by the feedback of described measurement and controls described active electrical source so that the controlling organization that the described common mode current of described port is controlled or limited.
50., according to the method for claim 48 described use common mode filtering apparatus and system, wherein, described active filter comprises extra measurement or the estimation of the common-mode voltage of being supported by the described armature winding of described common mode transformer.
51., according to the method for claim 48 described use common mode filtering apparatus and system, wherein, described controlling organization measures with common-mode voltage or the feedforward of estimation is controlled described active electrical source so that the common mode current of described port reduces.
52., according to the method for claim 48 described use common mode filtering apparatus and system, wherein, described controlling organization measures with common-mode voltage or estimation is controlled described active electrical source so that the active damping of described common-mode filter to be provided.
53. the method according to claim 44 described use common mode filtering apparatus and system, wherein, described active filter is connected with electric power converter and is comprised the DC blocking condenser of connecting with the AC electricity port, makes by described series capacitor restriction and controls flowing of DC common mode current and flowing by described active common mode filter restriction and control AC common mode current.
54. basically as in specification with reference to example and the described common mode filtering apparatus of accompanying drawing and system.
55. basically as in specification with reference to the method for example and accompanying drawing described use common mode filtering apparatus and system.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2011900474A AU2011900474A0 (en) | 2011-02-14 | Common Mode Filter | |
| AU2011900474 | 2011-02-14 | ||
| PCT/AU2012/000141 WO2012109703A1 (en) | 2011-02-14 | 2012-02-14 | Common-mode filter device and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103477544A true CN103477544A (en) | 2013-12-25 |
| CN103477544B CN103477544B (en) | 2017-09-12 |
Family
ID=46671868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280017633.2A Active CN103477544B (en) | 2011-02-14 | 2012-02-14 | Common-mode filter device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103477544B (en) |
| WO (1) | WO2012109703A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731015A (en) * | 2014-01-21 | 2014-04-16 | 江苏优控新能源科技有限公司 | Current feedback active power filter for restraining common mode voltage of variable-frequency speed control system |
| CN103928945A (en) * | 2014-05-07 | 2014-07-16 | 清源科技（厦门）股份有限公司 | Photovoltaic grid-connected system without transformers |
| CN105743339A (en) * | 2016-04-14 | 2016-07-06 | 西安许继电力电子技术有限公司 | Common-mode interference suppression circuit for three-phase EMI filter |
| CN107516996A (en) * | 2017-09-12 | 2017-12-26 | 青岛四方庞巴迪铁路运输设备有限公司 | The suppressing method and inverter of inverter direct-flow input end common mode disturbance voltage |
| CN107561385A (en) * | 2017-08-28 | 2018-01-09 | 浙江大学 | Output side transducer common-mode voltage method of testing based on high-pass filter |
| CN108075625A (en) * | 2016-11-15 | 2018-05-25 | Abb瑞士股份公司 | Multi-channel inverter for photovoltaic equipment |
| CN109116123A (en) * | 2018-07-26 | 2019-01-01 | 国网山东省电力公司莱芜供电公司 | A kind of transformer grounding resistance measuring system and method using photovoltaic DC-to-AC converter |
| CN109804465A (en) * | 2016-09-23 | 2019-05-24 | 三菱电机株式会社 | Semiconductor module for electric power and power semiconductor device |
| CN109831181A (en) * | 2019-03-28 | 2019-05-31 | 华峰测控技术(天津)有限责任公司 | A kind of noise suppression circuit and the test circuit including the noise suppression circuit |
| CN110456270A (en) * | 2019-08-09 | 2019-11-15 | 清华大学 | A kind of motor insulated on-line monitoring method and device |
| CN113635768A (en) * | 2021-09-15 | 2021-11-12 | 广州小鹏汽车科技有限公司 | Power system and vehicle |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014068423A (en) | 2012-09-24 | 2014-04-17 | Toshiba Lighting & Technology Corp | Power supply unit and lighting device |
| DE102012109638A1 (en) * | 2012-10-10 | 2014-05-15 | Sma Solar Technology Ag | Multi-string inverter with input-side EMC filter |
| NL2019705B1 (en) * | 2017-10-11 | 2019-04-19 | Van Bommel Johan | Compensating apparatus for reducing leakage current |
| US10530239B2 (en) | 2018-03-05 | 2020-01-07 | Regal Beloit America, Inc. | Filter systems for reducing bearing current in high-frequency motor control systems |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5831842A (en) * | 1996-09-18 | 1998-11-03 | President Of Okayama University | Active common mode canceler |
| WO2002023705A1 (en) * | 2000-09-12 | 2002-03-21 | Bombardier Transportation Gmbh | Filter circuit configuration for a converter circuit |
| JP2008067534A (en) * | 2006-09-08 | 2008-03-21 | Yaskawa Electric Corp | Filter and power converter |
| CN101884158A (en) * | 2008-03-04 | 2010-11-10 | 株式会社安川电机 | Output filter and power converter using output filter |
-
2012
- 2012-02-14 CN CN201280017633.2A patent/CN103477544B/en active Active
- 2012-02-14 WO PCT/AU2012/000141 patent/WO2012109703A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5831842A (en) * | 1996-09-18 | 1998-11-03 | President Of Okayama University | Active common mode canceler |
| WO2002023705A1 (en) * | 2000-09-12 | 2002-03-21 | Bombardier Transportation Gmbh | Filter circuit configuration for a converter circuit |
| JP2008067534A (en) * | 2006-09-08 | 2008-03-21 | Yaskawa Electric Corp | Filter and power converter |
| CN101884158A (en) * | 2008-03-04 | 2010-11-10 | 株式会社安川电机 | Output filter and power converter using output filter |
Non-Patent Citations (1)
| Title |
|---|
| HIDEAKI FUJITA ET AL.: "A High-Efficiency Solar Power Conditioner Using a Zigzag-connected Chopper Converter", 《THE 2010 INTERNATIONAL POWER ELECTRONICS CONFERENCE》, 24 June 2010 (2010-06-24) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103731015A (en) * | 2014-01-21 | 2014-04-16 | 江苏优控新能源科技有限公司 | Current feedback active power filter for restraining common mode voltage of variable-frequency speed control system |
| CN103731015B (en) * | 2014-01-21 | 2018-09-14 | 江苏优控新能源科技有限公司 | Inhibit the current feedback active power filter of frequency conversion speed-adjusting system common-mode voltage |
| CN103928945A (en) * | 2014-05-07 | 2014-07-16 | 清源科技（厦门）股份有限公司 | Photovoltaic grid-connected system without transformers |
| CN105743339A (en) * | 2016-04-14 | 2016-07-06 | 西安许继电力电子技术有限公司 | Common-mode interference suppression circuit for three-phase EMI filter |
| CN109804465A (en) * | 2016-09-23 | 2019-05-24 | 三菱电机株式会社 | Semiconductor module for electric power and power semiconductor device |
| CN108075625B (en) * | 2016-11-15 | 2021-08-10 | 马里奇控股荷兰有限公司 | Multi-channel inverter for photovoltaic equipment |
| CN108075625A (en) * | 2016-11-15 | 2018-05-25 | Abb瑞士股份公司 | Multi-channel inverter for photovoltaic equipment |
| CN107561385B (en) * | 2017-08-28 | 2019-05-28 | 浙江大学 | Output side transducer common-mode voltage test method based on high-pass filter |
| CN107561385A (en) * | 2017-08-28 | 2018-01-09 | 浙江大学 | Output side transducer common-mode voltage method of testing based on high-pass filter |
| CN107516996A (en) * | 2017-09-12 | 2017-12-26 | 青岛四方庞巴迪铁路运输设备有限公司 | The suppressing method and inverter of inverter direct-flow input end common mode disturbance voltage |
| CN109116123A (en) * | 2018-07-26 | 2019-01-01 | 国网山东省电力公司莱芜供电公司 | A kind of transformer grounding resistance measuring system and method using photovoltaic DC-to-AC converter |
| CN109831181A (en) * | 2019-03-28 | 2019-05-31 | 华峰测控技术(天津)有限责任公司 | A kind of noise suppression circuit and the test circuit including the noise suppression circuit |
| CN110456270A (en) * | 2019-08-09 | 2019-11-15 | 清华大学 | A kind of motor insulated on-line monitoring method and device |
| CN113635768A (en) * | 2021-09-15 | 2021-11-12 | 广州小鹏汽车科技有限公司 | Power system and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012109703A1 (en) | 2012-08-23 |
| CN103477544B (en) | 2017-09-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103477544A (en) | Common-mode filter device and system | |
| US7724549B2 (en) | Integrated power conditioning system and housing for delivering operational power to a motor | |
| Huber et al. | Analysis and design of fixed voltage transfer ratio DC/DC converter cells for phase-modular solid-state transformers | |
| Kheraluwala et al. | Performance characterization of a high-power dual active bridge DC-to-DC converter | |
| Shi et al. | Interleaved SEPIC power factor preregulator using coupled inductors in discontinuous conduction mode with wide output voltage | |
| US5943229A (en) | Solid state transformer | |
| Alonso et al. | Analysis, design, and experimentation on constant-frequency DC-DC resonant converters with magnetic control | |
| KR101851995B1 (en) | Resonant converter for wireless charger and method for implementing thereof | |
| US10205384B2 (en) | Resonant AC-to-DC converter | |
| JP2017532943A (en) | Intrinsic power factor correction method and apparatus | |
| CN109687604B (en) | One-to-many wireless power transmission system suitable for ordered loads and control method thereof | |
| Nguyen-Duy et al. | Minimization of the transformer inter-winding parasitic capacitance for modular stacking power supply applications | |
| Mai et al. | Analysis, design, and optimization of the IPT system with LC filter rectifier featuring high efficiency | |
| US11515078B2 (en) | Harmonics filters using semi non-magnetic bobbins | |
| Prasad et al. | A novel dual-lcc hybrid compensation network for high-efficiency cc-cv wireless charging of an ev battery considering weak communication | |
| Li et al. | Unbalanced current analysis of three‐phase AC–DC converter with power factor correction function based on integrated transformer | |
| Khodabandeh et al. | A highly reliable single-phase AC to three-phase AC converter with a small link capacitor | |
| CN107171325B (en) | Plug-and-play integrated modular active harmonic isolator | |
| EP4203221A1 (en) | Electromagnetic interference filter | |
| Liu et al. | A compact auxiliary power supply design for a medium frequency solid state transformer | |
| Hua et al. | LCL resonant compensation of movable ICPT systems with a multi-load | |
| Liu et al. | Auxiliary Power Supply for Input-Series Output-Parallel Medium-Voltage Solid State Transformers | |
| CN113114059A (en) | UPS output voltage compensation method | |
| Ojika et al. | Evaluation of inductive contactless power transfer outlet with coaxial coreless transformer | |
| CN109599956A (en) | Using the acquisition methods of the radio energy transmission system of harmonic current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |