CN205725440U - A kind of circuit for reducing alternating current power supply input harmonics - Google Patents
A kind of circuit for reducing alternating current power supply input harmonics Download PDFInfo
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- CN205725440U CN205725440U CN201620345392.XU CN201620345392U CN205725440U CN 205725440 U CN205725440 U CN 205725440U CN 201620345392 U CN201620345392 U CN 201620345392U CN 205725440 U CN205725440 U CN 205725440U
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Abstract
This utility model embodiment provides a kind of circuit for reducing alternating current power supply input harmonics, including bus and sequential switch circuit, the two ends of bus are connected with the outfan of sequential switch circuit respectively, bus is provided with capacitor, sequential switch circuit includes multiple insulated gate bipolar transistor (IGBT) module, multiple IGBT module parallel, multiple IGBT module connect controller, sequential switch circuit is also attached to ac power input end, being connected between ac power input end with sequential switch circuit and have inducer and switch, switch is connected in parallel with inducer.Input current can be made to make it follow the tracks of input voltage waveform real-time dynamicly, and input current waveform is close to sinusoidal wave, and makes input current and voltage in phase, the most not only can improve output, but also can reduce the harmonic wave of exchange input.
Description
Technical field
This utility model relates to alternating current power supply current correction technical field, in particular to a kind of circuit for reducing alternating current power supply input harmonics.
Background technology
Wideling popularize and using along with airport 400Hz medium frequency solid power supply, performance and the index of intermediate frequency power supply exchange input side are the most increasingly paid attention to.From civil aviation authority's more newly arriving to intermediate frequency power supply standard, quiet variable power source should be able to normally work, exchange input harmonics is necessarily less than 10%, from the point of view of this place the highest to EMC Requirements, airport, reduce intermediate frequency power supply input harmonics, the performance of raising electric current of intermediate frequency input side is that airplane ground static variable power source technology requires in the future is necessary, and its performance standard can be more and more higher simultaneously.
Prior art passes through phase-shift reactor and 12 pulse wave full-bridge rectifier assembled schemes, can control exchange input harmonics about 14%, but not reach the demand of 10%.The scheme also having is the external active filter of exchange input side at intermediate frequency power supply, to reduce input harmonics, although can reduce intermediate frequency power supply exchange input harmonics, but dumb in capacity configuration, and capacity configuration is inconvenient for.
Utility model content
In view of this, the purpose of this utility model embodiment is to provide a kind of circuit for reducing alternating current power supply input harmonics.
A kind of circuit for reducing alternating current power supply input harmonics that this utility model embodiment provides, including bus and sequential switch circuit, the two ends of described bus outfan with described sequential switch circuit respectively is connected, described bus is provided with capacitor, described sequential switch circuit includes multiple IGBT module, the plurality of IGBT module parallel, the plurality of IGBT module connects controller, described controller is for controlling being turned on or off of the plurality of IGBT module, described sequential switch circuit is also attached to ac power input end, it is connected between described ac power input end with described sequential switch circuit and has inducer and switch, described switch is connected in parallel with described inducer.
Preferably, described ac power input end is three-phase alternating-current supply input, described inducer includes the first inducer, the second inducer and the 3rd inducer, the A line of described three-phase alternating-current supply input is connected with described first inducer, the B line of described three-phase alternating-current supply input is connected with described second inducer, the C line of described three-phase alternating-current supply input is connected with described 3rd inducer, and described first inducer, described second inducer and described 3rd inducer are connected in parallel.
Preferably, described sequential switch circuit includes the first branch road, the second branch road and the 3rd branch road, the plurality of IGBT module includes that the first IGBT module, the second IGBT module, the 3rd IGBT module, the 4th IGBT module, the 5th IGBT module and the 6th IGBT module, described first IGBT module and described second IGBT module are composed in series described first branch road；Described 3rd IGBT module and described 4th IGBT module are composed in series described second branch road；Described 5th IGBT module and described 6th IGBT module are composed in series described 3rd branch road, and described first branch road, described second branch road and described 3rd branch circuit parallel connection connect.
Preferably, described first inducer is connected between described first IGBT module and the second IGBT module, described second inducer is connected between described 3rd IGBT module and the 4th IGBT module, and described 3rd inducer is connected between described 5th IGBT module and the 6th IGBT module.
Preferably, described switch includes the first switch and second switch, and described first switch is in parallel with described first inducer, and described second switch is in parallel with described second inducer.
Preferably, described first inducer is also connected in series with the 3rd switch, described 3rd switch and described first switch in parallel, described second inducer is also connected in series with the 4th switch, described 4th switch is in parallel with described second switch, is provided with the 5th switch between described 3rd inducer and the C line of described three-phase alternating-current supply.
Preferably, one end of described first switch is also serially connected with current-limiting resistance.
Preferably, described IGBT module includes that insulated gate bipolar transistor and fly-wheel diode, described insulated gate bipolar transistor and fly-wheel diode are connected in parallel.
Preferably, described insulated gate bipolar transistor includes that insulating gate type field effect tube, the source electrode of described insulating gate type field effect tube are connected with the positive pole of described fly-wheel diode, and the drain electrode of described insulating gate type field effect tube is connected with the negative pole of described fly-wheel diode.
Preferably, described controller is also connected with described switch, for controlling the folding of described switch compared with prior art, circuit for reducing alternating current power supply input harmonics of the present utility model is by being provided with inducer and IGBT module, can realize charging to the capacitor on inducer and bus by the time length and time interval controlling the conducting of IGBT module, not only can ensure that the voltage of capacitor reaches to use requirement, but also input current can be made to make it follow the tracks of input voltage waveform real-time dynamicly, input current waveform is close to sinusoidal wave, and make input current and voltage in phase, the most not only can improve output, but also the harmonic wave of exchange input can be reduced.When output loading is more than 50%, exchange input harmonics can be reduced to 5%, output loading full load is reduced to 3%.
Use the circuit for reducing alternating current power supply input harmonics of the present utility model, the phase-shift reactor in conventional art can be cancelled, reduce product design costs, reduce product size and weight, and input harmonics can be controlled below 3% (output is fully loaded), the most also avoiding in prior art, intermediate frequency power supply and the configuration of active filter capacity, the installing space of external accessory etc. limits.
For making above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, it is described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only some embodiment of the present utility model, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
The circuit diagram of the circuit for reducing alternating current power supply input harmonics that Fig. 1 provides for this utility model preferred embodiment.
Main element symbol description
First IGBT module 101；Second IGBT module 102；3rd IGBT module 103；4th IGBT module 104；5th IGBT module 105；6th IGBT module 106；Bus 107；Capacitor 108；First switch 109；Second switch 110；3rd switch 111；4th switch 112；5th switch 113；First inducer 114；Second inducer 115；3rd inducer 116；Insulated gate bipolar transistor 117；Fly-wheel diode 118；Resistance 119
Detailed description of the invention
Below in conjunction with accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Generally can with various different configurations arrange and design with the assembly of this utility model embodiment that illustrate described in accompanying drawing herein.Therefore, the detailed description to the embodiment of the present utility model provided in the accompanying drawings is not intended to limit claimed scope of the present utility model below, but is merely representative of selected embodiment of the present utility model.Based on embodiment of the present utility model, the every other embodiment that those skilled in the art are obtained on the premise of not making creative work, broadly fall into the scope of this utility model protection.
It should also be noted that similar label and letter represent similar terms in following accompanying drawing, therefore, the most a certain Xiang Yi accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.Meanwhile, in description of the present utility model, term " first ", " second " etc. are only used for distinguishing and describe, and it is not intended that indicate or hint relative importance.
As it is shown in figure 1, be the circuit diagram of the circuit for reducing alternating current power supply input harmonics that this utility model preferred embodiment provides.The described circuit for reducing alternating current power supply input harmonics includes bus 107, multiple insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) module, multiple inducer, controller and multiple switch.
Described controller is all connected with multiple IGBT module and multiple switch, and for controlling being turned on or off of IGBT module and switch, described controller can include memorizer, processor.Wherein, memorizer can be, but it is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only Memory, EEPROM) etc..Wherein, memorizer is used for storing program, and described processor, after receiving execution instruction, performs described program.
Processor is probably a kind of IC chip, has the disposal ability of signal.Above-mentioned processor can be general processor, including central processing unit (Central Processing Unit is called for short CPU), network processing unit (Network Processor is called for short NP) etc.；Can also is that digital signal processor (DSP), special IC (ASIC), ready-made programmable gate array (FPGA) or other PLDs, discrete gate or transistor logic, discrete hardware components.
Described bus 107 is provided with capacitor 108, and described capacitor 108 is used for storing electric energy, and is directly the load supplying of external connection.In the present embodiment, the number of described IGBT module is 6, including the first IGBT module the 101, second IGBT module the 102, the 3rd IGBT module the 103, the 4th IGBT module the 104, the 5th IGBT module 105 and the 6th IGBT module 106, described first IGBT module 101 is connected with described second IGBT module 102, forms the first branch road；Described 3rd IGBT module 103 is connected with described 4th IGBT module 104, forms the second branch road；Described 5th IGBT module 105 is connected with described 6th IGBT module 106, forms the 3rd branch road.Described first branch road, described second branch road and described 3rd branch circuit parallel connection connect, and are connected respectively with the two ends of described bus 107 after being connected in parallel.
Wherein, described IGBT module includes insulated gate bipolar transistor 117 and fly-wheel diode 118, described insulated gate bipolar transistor 117 can include insulating gate type field effect tube, the source electrode of described insulating gate type field effect tube is connected with the positive pole of described fly-wheel diode 118, the drain electrode of described insulating gate type field effect tube is connected with the negative pole of described fly-wheel diode 118, and the grid of insulating gate type field effect tube is connected with described controller.
In this utility model embodiment, alternating current power supply chooses three-phase alternating-current supply, and certainly in other detailed description of the invention, alternating current power supply can also choose other power supplys.Described three-phase alternating-current supply includes three inputs, for the A line of three-phase alternating-current supply input, the B line of three-phase alternating-current supply input and the C line of three-phase alternating-current supply input.In the present embodiment, the number of described inducer is three, including the first inducer the 114, second inducer 115 and the 3rd inducer 116, the A line of described three-phase alternating-current supply input is connected with described first inducer 114, the B line of described three-phase alternating-current supply input is connected with described second inducer 115, the C line of described three-phase alternating-current supply input is connected with described 3rd inducer 116, and described first inducer 114, described second inducer 115 and described 3rd inducer 116 are connected in parallel.
Described first inducer 114 is connected between described first IGBT module 101 and the second IGBT module 102, described second inducer 115 is connected between described 3rd IGBT module 103 and the 4th IGBT module 104, and described 3rd inducer 116 is connected between described 5th IGBT module 105 and the 6th IGBT module 106.
Described first inducer 114 connects the first switch 109, and described first switch 109 is connected in parallel with described first inducer 114, and one end of described first switch 109 is also serially connected with a resistance, for current limliting.Described first inducer 114 is also connected in series with the 3rd switch 111, and described first switch 109 is in parallel with described 3rd switch 111 and described first inducer 114.Described second inducer 115 is connected in parallel to second switch 110, and described second inducer 115 is also connected in series with the 4th switch 112, and described second switch 110 is connected in parallel with described 4th switch 112 and described second inducer 115.Described 3rd inducer 116 is also serially connected with the 5th switch 113, in the present embodiment, between described 5th switch 113 setting and the C line of described three-phase alternating-current supply input and described 3rd inducer 116.
The operation principle of the circuit for reducing alternating current power supply input harmonics of the present utility model is as follows:
First, three-phase alternating-current supply input is that capacitor 108 is pre-charged.Original state is that the grid of insulating gate type field effect tube all disconnects in all switches and all IGBT module.Controller controls described first switch 109 and described second switch 110 closes, the A line of three-phase alternating-current supply input and the input as alternating current of the B line of three-phase alternating-current supply input, when electric current flows out from the A line of described three-phase alternating-current supply input, its electric current flows through described first IGBT module 101 the most successively through resistance, described capacitor 108 and described 4th IGBT module 104 after through flowing back to the B line of three-phase alternating-current supply input described in second switch 110, so, can be that described capacitor 108 charges, the dash current of circuit is zero, capacitor 108 is not resulted in damage, but this process makes the voltage of capacitor 108 can only achieve certain value to capacitor 108 charging, e.g., about 530V.
Secondly, three-phase alternating-current supply input is inducer energy storage.Such as, it is the first inducer 114 and the second inducer 115 charges.Concrete, after completing the procedure, control described first switch 109 and described second switch 110 disconnects, control described 3rd switch 111, described 4th switch 112 and described 5th switch 113 Guan Bi.When electric current is the input of A, B line, controller controls the insulated gate bipolar transistor 117 of described second IGBT module 102 and the 4th IGBT module 104 and turns on, electric current sequentially passes through the first inducer the 114, second IGBT module the 102, the 4th IGBT module 104 and the second inducer 115, for described first inducer 114 and described second inducer 115 energy storage.Needed it is to be noted that now if the two ends connection of bus 107 has load, the energy needed for described load is provided by capacitor 108.
During three-phase alternating-current supply input is the first inducer 114 and the second inducer 115 energy storage, the actually fluctuation of the waveform of electric current, approximation levels off to sine wave.When waveform is in rising trend, controller controls the insulated gate bipolar transistor 117 of described second IGBT module 102 and the 4th IGBT module 104 and turns on, for described first inductance and the second induction charging；When waveform is on a declining curve, controller controls the insulated gate bipolar transistor 117 of described second IGBT module 102 and the 4th IGBT module 104 and cuts out, and current direction capacitor 108 is powered for capacitor 108.So, by regulating the second IGBT module 102 and the time interval of the 4th IGBT module 104 conducting, the waveform of described electric current can be regulated close to sinusoidal wave form, reduction harmonic wave.
Moreover, owing to the waveform of electric current and the waveform of voltage exist certain phase contrast, the time length of the conducting that can be regulated the insulated gate bipolar transistor 117 of the second IGBT module 102 and the 4th IGBT module 104 by controller is regulated the waveform of electric current and levels off to the waveform of voltage, make input current and voltage in phase, so exchange input harmonics can be reduced to 5% when output loading is more than 50%, output loading full load is reduced to 3%, can improve output.
When electric current is A line and the input of C line, controller controls the insulated gate bipolar transistor 117 of the second IGBT module 102 and the 6th IGBT module 106 and turns on, and making at three-phase alternating-current supply is the first inducer 114 and the 3rd inducer 116 energy storage；When electric current is B line and the input of C line, controller controls the insulated gate bipolar transistor 117 of the 4th IGBT module 104 and the 6th IGBT module 106 and turns on, making at three-phase alternating-current supply is the second inducer 115 and the 3rd inducer 116 energy storage, and the principle of its energy storage is consistent with said method.
Finally, inducer is that capacitor 108 boosts.When all inducers all reach use demand, controller controls the insulated gate bipolar transistor 117 of all IGBT module and is turned off, electric current can be through fly-wheel diode 118 afterflow in the first IGBT module 101 and the 4th IGBT module 104, can also be through fly-wheel diode 118 afterflow in the first IGBT module 101 and the 6th IGBT module 106, may also pass through fly-wheel diode 118 afterflow in the 3rd IGBT module 103 and the 6th IGBT module 106, energy is supplemented for described capacitor 108, three phase mains and inducer provide energy for described capacitor 108 again i.e. simultaneously, the magnitude of voltage making described inducer can promote further, such as on the basis of original 530V, rise to about 680V.
Circuit for reducing alternating current power supply input harmonics of the present utility model is particularly suited for reducing the power supply input harmonics of three-phase alternating current.
In sum, circuit for reducing alternating current power supply input harmonics of the present utility model is by being provided with inducer and IGBT module, can realize charging to the capacitor on inducer and bus by the time length and time interval controlling the conducting of IGBT module, not only can ensure that the voltage of capacitor reaches to use requirement, but also input current can be made to make it follow the tracks of input voltage waveform real-time dynamicly, input current waveform is close to sinusoidal wave, and make input current and voltage in phase, the most not only can improve output, but also the harmonic wave of exchange input can be reduced.When output loading is more than 50%, exchange input harmonics can be reduced to 5%, output loading full load is reduced to 3%.
Use the circuit for reducing alternating current power supply input harmonics of the present utility model, the phase-shift reactor in conventional art can be cancelled, reduce product design costs, reduce product size and weight, and input harmonics can be controlled below 3% (output is fully loaded), the most also avoiding in prior art, intermediate frequency power supply and the configuration of active filter capacity, the installing space of external accessory etc. limits.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for a person skilled in the art, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.It should also be noted that similar label and letter represent similar terms in following accompanying drawing, therefore, the most a certain Xiang Yi accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.
The above; it is only detailed description of the invention of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; change can be readily occurred in or replace, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should described be as the criterion with scope of the claims.
Claims (10)
1. the circuit being used for reducing alternating current power supply input harmonics, it is characterized in that, including bus and sequential switch circuit, the two ends of described bus outfan with described sequential switch circuit respectively is connected, described bus is provided with capacitor, described sequential switch circuit includes multiple IGBT module, the plurality of IGBT module parallel, the plurality of IGBT module connects controller, described controller is for controlling being turned on or off of the plurality of IGBT module, described sequential switch circuit is also attached to ac power input end, it is connected between described ac power input end with described sequential switch circuit and has inducer and switch, described switch is connected in parallel with described inducer.
Circuit for reducing alternating current power supply input harmonics the most according to claim 1, it is characterized in that, described ac power input end is three-phase alternating-current supply input, described inducer includes the first inducer, second inducer and the 3rd inducer, the A line of described three-phase alternating-current supply input is connected with described first inducer, the B line of described three-phase alternating-current supply input is connected with described second inducer, the C line of described three-phase alternating-current supply input is connected with described 3rd inducer, described first inducer, described second inducer and described 3rd inducer are connected in parallel.
Circuit for reducing alternating current power supply input harmonics the most according to claim 2, it is characterized in that, described sequential switch circuit includes the first branch road, the second branch road and the 3rd branch road, the plurality of IGBT module includes that the first IGBT module, the second IGBT module, the 3rd IGBT module, the 4th IGBT module, the 5th IGBT module and the 6th IGBT module, described first IGBT module and described second IGBT module are composed in series described first branch road；Described 3rd IGBT module and described 4th IGBT module are composed in series described second branch road；Described 5th IGBT module and described 6th IGBT module are composed in series described 3rd branch road, and described first branch road, described second branch road and described 3rd branch circuit parallel connection connect.
Circuit for reducing alternating current power supply input harmonics the most according to claim 3, it is characterized in that, described first inducer is connected between described first IGBT module and the second IGBT module, described second inducer is connected between described 3rd IGBT module and the 4th IGBT module, and described 3rd inducer is connected between described 5th IGBT module and the 6th IGBT module.
Circuit for reducing alternating current power supply input harmonics the most according to claim 4, it is characterised in that described switch includes the first switch and second switch, and described first switch is in parallel with described first inducer, and described second switch is in parallel with described second inducer.
Circuit for reducing alternating current power supply input harmonics the most according to claim 5, it is characterized in that, described first inducer is also connected in series with the 3rd switch, described 3rd switch and described first switch in parallel, described second inducer is also connected in series with the 4th switch, described 4th switch is in parallel with described second switch, is provided with the 5th switch between described 3rd inducer and the C line of described three-phase alternating-current supply.
Circuit for reducing alternating current power supply input harmonics the most according to claim 5, it is characterised in that one end of described first switch is also serially connected with current-limiting resistance.
Circuit for reducing alternating current power supply input harmonics the most according to claim 1, it is characterised in that described IGBT module includes that insulated gate bipolar transistor and fly-wheel diode, described insulated gate bipolar transistor and fly-wheel diode are connected in parallel.
Circuit for reducing alternating current power supply input harmonics the most according to claim 8, it is characterized in that, described insulated gate bipolar transistor includes insulating gate type field effect tube, the source electrode of described insulating gate type field effect tube is connected with the positive pole of described fly-wheel diode, and the drain electrode of described insulating gate type field effect tube is connected with the negative pole of described fly-wheel diode.
Circuit for reducing alternating current power supply input harmonics the most according to claim 1, it is characterised in that described controller is also connected with described switch, for controlling the folding of described switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620345392.XU CN205725440U (en) | 2016-04-21 | 2016-04-21 | A kind of circuit for reducing alternating current power supply input harmonics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620345392.XU CN205725440U (en) | 2016-04-21 | 2016-04-21 | A kind of circuit for reducing alternating current power supply input harmonics |
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| CN205725440U true CN205725440U (en) | 2016-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790557A (en) * | 2016-04-21 | 2016-07-20 | 四川航电微能源有限公司 | Circuit for reducing input harmonics of AC power supply |
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2016
- 2016-04-21 CN CN201620345392.XU patent/CN205725440U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105790557A (en) * | 2016-04-21 | 2016-07-20 | 四川航电微能源有限公司 | Circuit for reducing input harmonics of AC power supply |
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Granted publication date: 20161123 Effective date of abandoning: 20190709 |