CN205986613U - Crisscross parallelly connected power factor correction circuit of three -phase - Google Patents
Crisscross parallelly connected power factor correction circuit of three -phase Download PDFInfo
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- CN205986613U CN205986613U CN201620864524.XU CN201620864524U CN205986613U CN 205986613 U CN205986613 U CN 205986613U CN 201620864524 U CN201620864524 U CN 201620864524U CN 205986613 U CN205986613 U CN 205986613U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a crisscross parallelly connected power factor correction circuit of three -phase, includes a translation unit, the 2nd translation unit and parallelly connected first electric capacity group and second electric capacity group, every three -phase input all is connected with a corresponding translation unit and the 2nd translation unit. Corresponding crisscross the connecting in parallel of topological structure of a translation unit and the 2nd translation unit forms the crisscross parallelly connected power factor correction circuit of three level on three switches of three -phase topology. In the course of the work, ripple current cancel each other out reduces input/output current pulsation, effectively reduces electromagnetic interference, improves the power density of power, ripple current's reduction effectively reduces the volume of filter capacitance and inductance, improves circuit heat dispersion, guarantees electrical power generating system's reliability, and the inductance among the crisscross parallelly connected power factor correction circuit of three -phase adopts coupling inductance's physical arrangement, on crisscross parallelly connected basis, further reduces arrival current and inductive current's pulsation, reduces the volume of inductance, and reduce cost improves the reliability.
Description
Technical field
This utility model is related to power factor correction technology field and in particular to a kind of three-phase crisscross parallel power factor school
Positive circuit.
Background technology
With the development of New Energy Industry, PFC has become one indispensable in power system design
Point.Wherein, power factor refers to the ratio of effective power and total power consumption (apparent energy), is used effectively for weighing electric power
Degree, power factor is higher, and electric power utilization rate is higher；And PFC is then by adjusting electric current and voltage-phase
Mode, improves power factor.It is usually provided with circuit of power factor correction in the power supply system, be used for realizing power factor school
Just, improve electric power utilization rate.
In order to carry out PFC, as shown in Figure 1 circuit of power factor correction is usually used at present.This power because
Number correcting circuit is three-phase PWM (Pulse Width Modulation, the pulse width tune being become by 6 set of power switches
System) rectification circuit；Every phase input current flows into corresponding brachium pontis by inductance, and each brachium pontis is by upper and lower 2 device for power switching
Composition, that is, A phase input current Ia by filter inductance La inflow brachium pontis, connected by device for power switching S1 and S4 by corresponding brachium pontis
Composition；B phase input current Ib flows into brachium pontis by filter inductance Lb, and corresponding brachium pontis is by device for power switching S2 and S5 series connection group
Become；C phase input current Ic flows into brachium pontis by filter inductance Lc, and corresponding brachium pontis is by device for power switching S3 and S6 series connection group
Become；It is connected with filter capacitor Co between busbar voltage Vbus and ground wire.In practical work process, every phase input current can pass through
Control being switched on or off of on corresponding brachium pontis 2 device for power switching, reach the purpose of PFC.
However, utility model people is found by research, in the design of high power power, higher voltage and current is easy
Lead to high electromagnetic interference；And for tolerating high voltage and high current, circuit of power factor correction typically requires using high inductance
The filter inductance of value and the filter capacitor of high capacity, the volume by this filter inductance and filter capacitor is also increasing, processing
Easily cause work calorieses to gather while cost, difficulty are high, lead to the even whole power-supply system mistake of circuit of power factor correction
Heat, generation operation irregularity, the reliability of power-supply system is low.
Utility model content
The application provides a kind of three-phase crisscross parallel circuit of power factor correction, to solve power-supply system electricity in prior art
Magnetic disturbance height, processing cost and the problem that difficulty is high, reliability is low.
According in a first aspect, providing a kind of three-phase crisscross parallel circuit of power factor correction in a kind of embodiment, including
First capacitance group of one converting unit, the second converting unit and parallel connection and the second capacitance group, wherein：
Each three-phase input end is respectively connected with corresponding first converting unit and the second converting unit；
Described first converting unit include the first inductance, the first diode, the second diode, the 3rd diode, the four or two
Pole pipe, the first power tube and the second power tube；The two ends of described first capacitance group described first diode in parallel, described first work(
The series circuit of rate pipe, described second power tube and described 4th diode；Described first power tube and described second power tube
Intermediate node be connected with the intermediate node of described first capacitance group；Described first diode and the centre of described first power tube
Between the intermediate node of node and described second power tube and described 4th diode, the second diode in parallel and the three or two
The series circuit of pole pipe；One end of described first inductance is connected with described three-phase input end, the other end and described second diode
And the 3rd the intermediate node between diode connect；
Described first converting unit include the first inductance, the first diode, the second diode, the 3rd diode, the four or two
Pole pipe, the first power tube and the second power tube；The two ends of described first capacitance group described first diode in parallel, described first work(
The series circuit of rate pipe, described second power tube and described 4th diode；Described first power tube and described second power tube
Intermediate node be connected with the intermediate node of described first capacitance group；Described first diode and the centre of described first power tube
Between the intermediate node of node and described second power tube and described 4th diode, the second diode in parallel and the three or two
The series circuit of pole pipe；One end of described first inductance is connected with described three-phase input end, the other end and described second diode
And the 3rd the intermediate node between diode connect；
Driving PWM waveform phase place on described first power tube and the second power tube, advanced or delayed described 3rd power
Driving PWM waveform phase place 180 degree on pipe and the 4th power tube.
Alternatively, described first inductance and described second inductance are coupling inductance.
Alternatively, described first power tube, described second power tube, described 3rd power tube and described 4th power tube
All include field-effect transistor or insulated gate bipolar transistor.
Alternatively, described second diode, described 3rd diode, described 6th diode and described 7th diode
All include kenotron.
Alternatively, described first diode, described 4th diode, described 5th diode and described 8th diode
All include high-frequency and high-voltage fly-wheel diode.
Alternatively, described high-frequency and high-voltage fly-wheel diode includes Ultrafast recovery diode or silicon carbide diode.
Alternatively, the equal turn numbers of described first inductance and described second inductance.
Alternatively, described first capacitance group includes the first electric capacity and the second electric capacity connected, described first electric capacity and described
Intermediate node between second electric capacity is the intermediate node of described first capacitance group；Described second capacitance group includes the 3rd connecting
Electric capacity and the 4th electric capacity, the intermediate node between described 3rd electric capacity and described 4th electric capacity is the centre of described second capacitance group
Node.
Alternatively, the capacitance of described first electric capacity is equal with the capacitance of described second electric capacity, and described 3rd electric capacity
Capacitance equal with the capacitance of described 4th electric capacity.
Alternatively, the inductance value of the inductance value of described first inductance and described second inductance is equal.
According to above-described embodiment three-phase crisscross parallel circuit of power factor correction, including the first converting unit, second turn
Change the first capacitance group and second capacitance group of unit and parallel connection；Each three-phase input end is respectively connected with corresponding first conversion
Unit and the second converting unit.The described first converting unit topological structure crisscross parallel corresponding with the second converting unit, shape
Become the circuit of power factor correction of three-phase three-switch three-level topology crisscross parallel, in the course of the work, ripple current mutually supports
Disappearing, reduce input and output pulsation of current, thus effectively reducing electromagnetic interference, improving the power density of power supply；And, ripple current
Reduction reduce the volume of filter capacitor and inductance further, while reducing production cost, circuit thermal diffusivity can be improved
Can be it is ensured that the reliability of power-supply system；In addition, the inductance in described three-phase crisscross parallel circuit of power factor correction is using coupling
The physical arrangement of inductance, on the basis of crisscross parallel, reduces the pulsation of input current and inductive current further, reduces inductance
Volume, can effectively reduces cost and improve reliability.
Brief description
Fig. 1 is a kind of structural representation of current power factor correcting circuit；
Fig. 2 changes list for a kind of three-phase crisscross parallel circuit of power factor correction first that this utility model embodiment provides
The structural representation of unit；
Fig. 3 changes list for a kind of three-phase crisscross parallel circuit of power factor correction second that this utility model embodiment provides
The structural representation of unit；
A kind of structural representation of three-phase crisscross parallel circuit of power factor correction that Fig. 4 provides for this utility model embodiment
Figure；
A kind of ripple current result schematic diagram that Fig. 5 provides for this utility model embodiment.
Specific embodiment
Combine accompanying drawing below by specific embodiment this utility model is described in further detail.
This utility model embodiment provide three-phase crisscross parallel circuit of power factor correction, including the first converting unit,
Second converting unit, and the first capacitance group of parallel connection and the second capacitance group；For the three-phase alternating current of power-supply system, each three
Phase input is respectively connected with corresponding first converting unit and the second converting unit；The input of A cross streams electricity is connected with and institute
State the first corresponding converting unit of A cross streams electricity and the second converting unit；The input of B cross streams electricity is connected with and described B
The first corresponding converting unit of cross streams electricity and the second converting unit；The input of C cross streams electricity is connected with and is intersected with described C
The first corresponding converting unit of stream electricity and the second converting unit；And, A cross streams electricity, B cross streams electricity and C cross streams electricity
Phase place differs 120 degree successively.
In this utility model embodiment, with A cross streams electricity input connected the first converting unit, second conversion
As a example unit, the structure of described first converting unit and the second converting unit is described in detail.
Refer to Fig. 2, a kind of three-phase crisscross parallel circuit of power factor correction the providing for this utility model embodiment
The structural representation of one converting unit.Described first converting unit includes the first inductance L1, the first diode D1, the second diode
D2, the 3rd diode D3, the 4th diode D4, the first power tube Q1 and the second power tube Q2.Described first capacitance group includes going here and there
First electric capacity C1 of connection and the second electric capacity C2, alternatively, the electricity of the capacitance of described first electric capacity C1 and described second electric capacity C2
Capacitance is equal；Certainly in the specific implementation, described first capacitance group can include any number of electric capacity in series or in parallel,
Do not limit in this utility model embodiment.
The two ends of described first capacitance group described first diode D1 in parallel, described first power tube Q1, described second work(
Rate pipe Q2 and the series circuit of described 4th diode D4, the two ends of described first capacitance group are also respectively connected with bus Vbus+
End and bus Vbus- end；Specifically, the negative pole of described first diode D1 connect corresponding with bus Vbus+ to the first capacitance group
Connection end；In this utility model embodiment, described first power tube Q1 and described second power tube Q2 can select metal
Oxide field-effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET)
Or insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT；When described first power
When pipe Q1 and described second power tube Q2 is MOS memory, alternatively, described metal oxide field effect
Transistor is answered to select N ditch MOSFET；The drain electrode of the first power tube Q1 is connected with the positive pole of the first diode D1, the first power tube Q1
Source electrode be connected with the drain electrode of the second power tube Q2, the source electrode of the second power tube Q2 is connected with the negative pole of the 4th diode D4；
When described first power tube Q1 and described second power tube Q2 is insulated gate bipolar transistor, described first power tube Q1
Colelctor electrode be connected with the positive pole of the first diode D1, the emitter stage of described first power tube Q1 and the current collection of the second power tube Q2
Pole connects, and the emitter stage of described second power tube Q2 is connected with the negative pole of the 4th diode D4, described first power tube Q1's
Grid is connected with the first driving PWM, and the grid of described second power tube Q2 is connected with the second driving PWM；Described first work(
The intermediate node of rate pipe Q1 and described second power tube Q2 is connected with the intermediate node of described first capacitance group, in this utility model
In embodiment, the intermediate node of described first capacitance group can be understood as between described first electric capacity C1 and described second electric capacity C2
Intermediate node, and the intermediate node of described first capacitance group ground connection；The positive pole of described 4th diode D4 connects to first
The corresponding connection end of bus Vbus- of capacitance group.
Intermediate node between described first diode D1 and described first power tube Q1, and described second power tube Q2
Between intermediate node and described 4th diode D4 between, the string that parallel connection is made up of the second diode D2 and the 3rd diode D3
Connection circuit.The negative pole of described second diode D2 connects to the intermediate node between the first diode D1 and the first power tube Q1,
The positive pole of described 3rd diode D3 connects to the intermediate node between the second power tube Q2 and described 4th diode D4.
The input of one end of described first inductance L1 and A cross streams electricity is connected, the other end and described second diode D2
Connect with the intermediate node of the 3rd diode D3.
Refer to Fig. 3, a kind of three-phase crisscross parallel circuit of power factor correction the providing for this utility model embodiment
The structural representation of two converting units.Described second converting unit includes the second inductance L1 ', the 5th diode D1 ', the six or two pole
Pipe D2 ', the 7th diode D3 ', the 8th diode D4 ', the 3rd power tube Q1 ' and the 4th power tube Q2 '.Described second capacitance group
Including the 3rd electric capacity C3 and the 4th electric capacity C4 of series connection, alternatively, the electric capacity of described 3rd electric capacity C3 and described 4th electric capacity C4
Value is equal；Certainly in the specific implementation, described second capacitance group can include any number of electric capacity in series or in parallel, at this
Do not limit in utility model embodiment.
The two ends of described second capacitance group described 5th diode D1 ' in parallel, described 3rd power tube Q1 ', the described 4th
Power tube Q2 ' and the series circuit of described 8th diode D4 ', the two ends of described second capacitance group are also respectively connected with bus
Vbus+ end and bus Vbus- end；Specifically, the negative pole of described 5th diode D1 ' connects to the second capacitance group and bus Vbus
+ corresponding connection end；In this utility model embodiment, described 3rd power tube Q1 ' and described 4th power tube Q2 ' can select
With MOS memory (Metal Oxide Semiconductor Field Effect Transistor,
) or insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT MOSFET；When described
When three power tube Q1 ' and described 4th power tube Q2 ' are MOS memory, alternatively, described metal oxygen
N ditch MOSFET selected by compound field-effect transistor；The drain electrode of the 3rd power tube Q1 ' is connected with the positive pole of the 5th diode D1 ', the
The source electrode of three power tube Q1 ' is connected with the drain electrode of the 4th power tube Q2 ', the source electrode of the 4th power tube Q2 ' and the 8th diode D4 '
Negative pole be connected；When described 3rd power tube Q1 ' and described 4th power tube Q2 ' is insulated gate bipolar transistor,
The colelctor electrode of described 3rd power tube Q1 ' is connected with the positive pole of the 5th diode D1 ', the emitter stage of described 3rd power tube Q1 '
It is connected with the colelctor electrode of the 4th power tube Q2 ', the emitter stage of described 4th power tube Q2 ' and the negative pole phase of the 8th diode D4 '
Connect, the grid of described 3rd power tube Q1 ' drives PWM to be connected with the 3rd, the grid of described 4th power tube Q2 ' is all with the
Four driving PWM are connected；The intermediate node of described 3rd power tube Q1 ' and described 4th power tube Q2 ' and described second electric capacity
The intermediate node of group connects, and in this utility model embodiment, the intermediate node of described second capacitance group can be understood as described
Intermediate node between 3rd electric capacity C3 and described 4th electric capacity C4, and the intermediate node of described second capacitance group ground connection；Institute
The positive pole stating the 8th diode D4 ' connects to the corresponding connection end of bus Vbus- of the second capacitance group.
Intermediate node between described 5th diode D1 ' and described 3rd power tube Q1 ', and described 4th power tube
Between intermediate node between Q2 ' and described 8th diode D4 ', parallel connection is by the 6th diode D2 ' and the 7th diode D3 ' group
The series circuit becoming.The negative pole of described 6th diode D2 ' connects between the 5th diode D1 ' and the 3rd power tube Q1 '
Intermediate node, the positive pole of described 7th diode D3 ' connects between the 4th power tube Q2 ' and described 8th diode D4 '
Intermediate node.
The input of one end of described second inductance L1 ' and A cross streams electricity is connected, the other end and described 6th diode
The intermediate node of D2 ' and the 7th diode D3 ' connects.
In concrete control process, the waveform phase of the first driving PWM on described first power tube Q1, advanced or delayed
The 3rd driving PWM waveform phase place on 3rd power tube Q1 '；The waveform phase of the second driving PWM on described second power tube Q2
Position, the waveform phase 180 degree of the 4th driving PWM on advanced or delayed 4th power tube Q2 '.
And, in order to reduce the pulsation of input current and inductive current, in this utility model embodiment, described first electricity
Sense L1 and the second inductance L1 ' adopts the physical arrangement of coupling inductance.Two inductance are wound on above same magnetic core, are beneficial to straight
Connect equal properties of flow and the dynamic characteristic of parallel connection；And, in the specific implementation, described first inductance L1 and the second inductance L1 ' institute shape
The coupling inductance becoming can be using different coupled modes, and alternatively, described first inductance L1 and the second inductance L1 ' uses magnetic collection
Become coupled modes, can effectively mitigate the weight and volume of inductance.Alternatively, described first inductance L1 and described second inductance
The equal turn numbers of L1 '；The inductance value of described first inductance L1 and described second inductance L1 ' is also equal.
In addition, in the specific implementation, described second diode Q2, described 3rd diode Q3, described 6th diode Q2 '
All include kenotron with described 7th diode Q3 ', thus playing reverse blocking effect.Described first diode
Q1, described 4th diode Q4, described 5th diode Q1 ' and described 6th diode Q4 ' all include high-frequency and high-voltage afterflow two
Pole pipe, specifically, can select Ultrafast recovery diode or silicon carbide diode；And, alternatively, described high-frequency and high-voltage continues
The reverse recovery time of stream diode is less than 100ns, certainly, according to physical circuit design requirement, described high-frequency and high-voltage afterflow two
Pole pipe can select other species diode such as gallium nitride diodes etc., and described reverse recovery time is only one preferably several
Value is not limited to above-mentioned numerical value；By using the high-frequency and high-voltage fly-wheel diode that reverse recovery time is little, can effectively reduce
Reverse recovery loss, reduces electromagnetic interference, thus improving the reliability of Circuits System.
Refer to Fig. 4, a kind of three-phase crisscross parallel circuit of power factor correction providing for this utility model embodiment
Structural representation.It is respectively provided with above-mentioned first converting unit and the second converting unit in the input of each three-phase alternating current, and often
Corresponding first converting unit of cross streams electricity all shares the first capacitance group, and corresponding second converting unit of each alternating current is all common
Use the second capacitance group；In every cross streams electrical power factor correcting circuit, corresponding first converting unit and the second converting unit
Input be connected, outfan is also connected, thus constituting Interleaving and Transformer Paralleling, forms complete three-phase crisscross parallel power
Factor correcting circuit, by using the mode of two three-phase three-switch three-level topology crisscross parallels, it is possible to decrease input and output electricity
Stream pulsation, reduces wave filter volume, improves the dynamic property of changer simultaneously.In the specific implementation, the corresponding work(of B cross streams electricity
Rate factor correcting circuit and the C cross streams corresponding circuit of power factor correction of electricity corresponding power electric with above-mentioned A cross streams because
Number correction circuit structure is identical, will not be described here.And, in the corresponding circuit of power factor correction of B cross streams electricity, power
The waveform phase of the driving PWM on pipe Q3, the waveform phase 180 degree of the driving PWM in advance or on after-power pipe Q3 '；Power
The waveform phase of the driving PWM on pipe Q4, the waveform phase 180 degree of the driving PWM in advance or on after-power pipe Q4 '.In C phase
In the corresponding circuit of power factor correction of alternating current, the waveform phase of the driving PWM on power tube Q5, advanced or after-power pipe
The waveform phase 180 degree of the driving PWM on Q5 '；The waveform phase of the driving PWM on power tube Q6, advanced or after-power pipe
The waveform phase 180 degree of the driving PWM on Q6 '.
In this utility model embodiment, describe described three-phase crisscross parallel power factor in detail taking A cross streams electricity as a example
The work process of correcting circuit.The second driving PWM on the first driving PWM, the second power tube Q2 on first power tube Q1, root
Electric current according to the first inductance L1 to control, and makes the current following A phase voltage of the first inductance L1；On 3rd power tube Q1 ' the 3rd
Drive the 4th driving PWM on PWM and the 4th power tube Q2 ', controlled according to the electric current of the second inductance L1 ', make the second electricity
The current following A phase voltage of sense L1 '；The electric current of the first inductance L1 and the second inductance L1 ' and as total A phase current.Specifically,
When A cross streams piezoelectric voltage is just, the first power tube Q1 conducting, A cross streams power supply charges to the first inductance L1, on inductive current
Rise, the second diode D2 conducting, the first diode D1 bears backward voltage Vbus+ and turns off, and the first electric capacity C1 provides energy to load
Amount discharge voltage declines；The first inductance L1 voltage reversal, A cross streams power supply and the first inductance L1 when the first power tube Q1 turns off
Commonly through the second diode D2, the first diode D1 charges to the first electric capacity C1, provides energy, inductive current for load simultaneously
Decline, the first electric capacity C1 voltage rises.When A cross streams voltage is negative, the second diode Q2 is open-minded, and A cross streams power supply is to the
One inductance L1 charges, and inductive current losing side ramps up, and the 4th diode D4 bears negative direction voltage Vbus- and turns off, the second electric capacity
C2 provides energy discharge voltage to decline to load；When second power tube Q2 turns off, the first inductance L1 when the second power tube Q2 turns off
, commonly through the 3rd diode D3, the 4th diode D4 charges to the second electric capacity C2 for voltage reversal, A cross streams power supply and L1, with
When for load provide energy, inductive current decline, second electric capacity C2 voltage rise.A phase current passes through the first power tube Q1 and the
(i.e. A phase voltage is exactly to control the first power tube Q1, and A phase voltage controls the second work(when being negative for the break-make control of two power tube Q2
Rate pipe Q2) so that inductive current waveform follows A phase input voltage waveform, reach the purpose of PFC.
Equally, for B phase, the driving PWM on driving PWM, power tube Q4 on power tube Q3, according to the electric current of inductance L2
To control, to make the current following B phase voltage of inductance L2；Driving PWM on driving PWM on power tube Q3 ', power tube Q4 ', root
Electric current according to inductance L2 ' to control, and is the current following B phase voltage of inductance L2 '；The electric current of inductance L2 and the second inductance L2 ' and
It is total B phase current.For C phase, the driving PWM on driving PWM, power tube Q6 on power tube Q5, according to inductance L3's
Electric current, to control, makes the current following B phase voltage of inductance L3；Driving on driving PWM on power tube Q5 ', power tube Q5 '
PWM, the electric current according to inductance L3 ', to control, is the current following C phase voltage of inductance L3 '；Inductance L3's and the second inductance L3 '
Electric current and as total C phase current.Specifically, B phase and C facies principle and A are consistent, each work independently, and operating frequency is consistent,
Phase place staggers 120 degree successively, will not be described here.Turned on and off by driving the power tube of each passage, control L1 and L1 ',
L2 and L2 ', L3 and L3 ' electric current so that the current waveform of L1 and L1 ' follows A phase voltage, the current waveform of L2 and L2 ' follows B
Phase voltage, and the current waveform of L3 and L3 ' follows C phase voltage.
Refer to Fig. 4, refer to Fig. 5 simultaneously, illustrate for a kind of ripple current result that this utility model embodiment provides
Figure, the waveform phase due to the first driving PWM and the second driving PWM staggers 180 degree, just makes the electric current of L1 and the electric current of L1 '
In opposite direction, in opposite direction, the electric current of L3 and the electric current of L3 ' of the electric current rise and fall of the electric current of L2 and L2 ' of rise and fall
Rise and fall in opposite direction, thus corresponding total current IL1 of L1, L2 and L3, with L1 ', L2 ' and the corresponding total current of L3 '
IL2, rise and fall are in opposite direction；Due to output-parallel, ripple current is cancelled out each other, the ripple also phase of total output current Iout
Should reduce.
Described from above-described embodiment, the three-phase crisscross parallel PFC electricity that this utility model embodiment provides
Road includes the first capacitance group and second capacitance group of the first converting unit, the second converting unit and parallel connection；Each three-phase input
End is respectively connected with corresponding first converting unit and the second converting unit.Described first converting unit is relative with the second converting unit
The topological structure crisscross parallel answered, forms the circuit of power factor correction of three-phase three-switch three-level topology crisscross parallel, in work
During work, ripple current is cancelled out each other, and reduces input and output pulsation of current, thus effectively reducing electromagnetic interference, improves power supply
Power density；And, the reduction of ripple current reduces the volume of filter capacitor and inductance further, is reducing production cost
Meanwhile, it is capable to improve circuit heat dispersion it is ensured that the reliability of power-supply system；In addition, described three-phase crisscross parallel power factor
Inductance in correcting circuit adopts the physical arrangement of coupling inductance, on the basis of crisscross parallel, reduces input current further
With the pulsation of inductive current, reduce inductance volume, can effectively reduces cost and raising reliability.
Use above specific case is illustrated to this utility model, is only intended to help and understands this utility model, and
Not in order to limit this utility model.For this utility model person of ordinary skill in the field, according to think of of the present utility model
Think, some simple deductions, deformation or replacement can also be made.
Claims (10)
1. a kind of three-phase crisscross parallel circuit of power factor correction is it is characterised in that include the first converting unit, the second conversion list
First capacitance group of unit and parallel connection and the second capacitance group, wherein：
Each three-phase input end is respectively connected with corresponding first converting unit and the second converting unit；
Described first converting unit include the first inductance, the first diode, the second diode, the 3rd diode, the 4th diode,
First power tube and the second power tube；The two ends of described first capacitance group described first diode in parallel, described first power tube,
Described second power tube and the series circuit of described 4th diode；Described first power tube and the centre of described second power tube
Node is connected with the intermediate node of described first capacitance group；The intermediate node of described first diode and described first power tube,
And between described second power tube and the intermediate node of described 4th diode, the second diode in parallel and the 3rd diode
Series circuit；One end of described first inductance is connected with described three-phase input end, the other end and described second diode and the 3rd
Intermediate node between diode connects；
Described second converting unit include the second inductance, the 5th diode, the 6th diode, the 7th diode, the 8th diode,
3rd power tube and the 4th power tube；The two ends of described second capacitance group described 5th diode in parallel, described 3rd power tube,
Described 4th power tube and the series circuit of described 8th diode；Described 3rd power tube and the centre of described 4th power tube
Node is connected with the intermediate node of described second capacitance group；The intermediate node of described 5th diode and described 3rd power tube,
And between described 4th power tube and the intermediate node of described 8th diode, the 6th diode in parallel and the 7th diode
Series circuit；One end of described second inductance is connected with described three-phase input end, the other end and described 6th diode and the 7th
Intermediate node between diode connects；
Driving PWM waveform phase place on described first power tube, the driving PWM waveform on advanced or delayed described 3rd power tube
Phase place 180 degree；Driving PWM waveform phase place on described second power tube, the driving on advanced or delayed described 4th power tube
PWM waveform phase place 180 degree.
2. three-phase crisscross parallel circuit of power factor correction as claimed in claim 1 it is characterised in that described first inductance and
Described second inductance is coupling inductance.
3. three-phase crisscross parallel circuit of power factor correction as claimed in claim 1 is it is characterised in that described first power
Pipe, described second power tube, described 3rd power tube and described 4th power tube all include field-effect transistor or insulated gate
Bipolar transistor.
4. three-phase crisscross parallel circuit of power factor correction as claimed in claim 1 is it is characterised in that described two or two pole
Pipe, described 3rd diode, described 6th diode and described 7th diode all include kenotron.
5. three-phase crisscross parallel circuit of power factor correction as claimed in claim 1 is it is characterised in that described one or two pole
Pipe, described 4th diode, described 5th diode and described 8th diode all include high-frequency and high-voltage fly-wheel diode.
6. three-phase crisscross parallel circuit of power factor correction as claimed in claim 5 is it is characterised in that described high-frequency and high-voltage continues
Stream diode includes Ultrafast recovery diode or silicon carbide diode.
7. three-phase crisscross parallel circuit of power factor correction as claimed in claim 2 it is characterised in that described first inductance and
The equal turn numbers of described second inductance.
8. three-phase crisscross parallel circuit of power factor correction as claimed in claim 1 is it is characterised in that described first capacitance group
The first electric capacity including series connection and the second electric capacity, the intermediate node between described first electric capacity and described second electric capacity is described the
The intermediate node of one capacitance group；Described second capacitance group include connect the 3rd electric capacity and the 4th electric capacity, described 3rd electric capacity and
Intermediate node between described 4th electric capacity is the intermediate node of described second capacitance group.
9. three-phase crisscross parallel circuit of power factor correction as claimed in claim 8 is it is characterised in that described first electric capacity
Capacitance is equal with the capacitance of described second electric capacity, and the capacitance of the capacitance of described 3rd electric capacity and described 4th electric capacity
Equal.
10. the three-phase crisscross parallel circuit of power factor correction as described in claim 1 or 2 or 7 is it is characterised in that described
The inductance value of the inductance value of one inductance and described second inductance is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864524.XU CN205986613U (en) | 2016-08-09 | 2016-08-09 | Crisscross parallelly connected power factor correction circuit of three -phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620864524.XU CN205986613U (en) | 2016-08-09 | 2016-08-09 | Crisscross parallelly connected power factor correction circuit of three -phase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205986613U true CN205986613U (en) | 2017-02-22 |
Family
ID=59977230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620864524.XU Withdrawn - After Issue CN205986613U (en) | 2016-08-09 | 2016-08-09 | Crisscross parallelly connected power factor correction circuit of three -phase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205986613U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100314B (en) * | 2016-08-09 | 2019-06-14 | 深圳驿普乐氏科技有限公司 | A kind of three-phase crisscross parallel circuit of power factor correction |
| CN113162020A (en) * | 2021-04-20 | 2021-07-23 | 核工业西南物理研究院 | Current equalizing circuit structure with a large number of capacitors connected in parallel and power supply of ball-and-socket device |
-
2016
- 2016-08-09 CN CN201620864524.XU patent/CN205986613U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106100314B (en) * | 2016-08-09 | 2019-06-14 | 深圳驿普乐氏科技有限公司 | A kind of three-phase crisscross parallel circuit of power factor correction |
| CN113162020A (en) * | 2021-04-20 | 2021-07-23 | 核工业西南物理研究院 | Current equalizing circuit structure with a large number of capacitors connected in parallel and power supply of ball-and-socket device |
| CN113162020B (en) * | 2021-04-20 | 2022-10-18 | 核工业西南物理研究院 | Current equalizing circuit structure with a large number of capacitors connected in parallel and power supply of ball-and-socket device |
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| AV01 | Patent right actively abandoned |
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