CN111431420A - Novel three-phase four-wire system three-level Buck PFC rectifier system - Google Patents

Novel three-phase four-wire system three-level Buck PFC rectifier system Download PDF

Info

Publication number
CN111431420A
CN111431420A CN202010305536.XA CN202010305536A CN111431420A CN 111431420 A CN111431420 A CN 111431420A CN 202010305536 A CN202010305536 A CN 202010305536A CN 111431420 A CN111431420 A CN 111431420A
Authority
CN
China
Prior art keywords
phase
power
diode
circuit
module
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.)
Pending
Application number
CN202010305536.XA
Other languages
Chinese (zh)
Inventor
李志忠
赵付立
李优新
陈嘉辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong University of Technology
Original Assignee
Guangdong University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong University of Technology filed Critical Guangdong University of Technology
Priority to CN202010305536.XA priority Critical patent/CN111431420A/en
Publication of CN111431420A publication Critical patent/CN111431420A/en
Pending legal-status Critical Current

Links

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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • 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
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4291—Arrangements for improving power factor of AC input by using a Buck converter to switch the input current
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The invention discloses a novel three-phase four-wire three-level Buck PFC rectifier system, which utilizes a Buck topological circuit structure, an IGBT without an anti-parallel diode and corresponding circuit control to realize the function of correcting the inductive Current Continuous Mode (CCM) Buck type three-phase four-wire three-level power factor, thereby achieving the effects of reducing total harmonic distortion, improving the power factor and efficiently and stably working.

Description

Novel three-phase four-wire system three-level Buck PFC rectifier system
Technical Field
The invention relates to the technical field of AC/DC power factor correction technology, in particular to a novel three-phase four-wire three-level Buck PFC rectifier system.
Background
With the rapid development of power electronic technology, various electric devices are popularized. However, power electronic switching power supply devices that are connected to the grid become a major source of injected current harmonics into the grid. Higher current harmonics have severely affected the quality of the power grid power, transmission efficiency, and safe operation of other equipment. Therefore, relevant organizations at home and abroad set relevant safety standards for limiting the current harmonic waves of the power system aiming at the problem. Power factor correction has become an essential part of medium and high power electronic equipment as an effective method for suppressing higher harmonic currents and improving power factor.
Power factor correction circuits are divided into Passive Power Factor Correction (PPFC) and Active Power Factor Correction (APFC). APFC is widely used because of its small size and high PF value. The conventional power factor correction circuit is represented by a Boost active power factor correction rectifier (Boost APFC), and is widely applied due to the characteristics of simple structure, safety and stability. However, under the condition of wide range of input voltage, the traditional Boost APFC rectifier has lower efficiency when the low voltage is input than when the high voltage is input, and has higher output voltage and higher requirement on the voltage stress of a power device of a later stage device. Due to the existence of the preceding stage rectifier bridge, excessive energy loss is caused, and particularly, the on-state loss of the diode is more obvious in low-voltage high-power, so that the improvement of the overall efficiency of the rectifier is greatly limited.
In order to solve the problems brought by the traditional Boost APFC rectifier, a non-bridge Buck PFC rectifier is proposed by a learner, and a switching tube is used for replacing a bridge arm diode in the non-bridge Buck scheme, so that the loss of a switching device of a conduction path is reduced, the purpose of step-down output is realized, the voltage stress requirement of a power device of a rear-stage circuit is reduced, the cost is reduced, and the working efficiency is improved. However, when the bridgeless Buck PFC rectifier is used for low-voltage input, since the output voltage is higher than the input voltage, a certain input current dead angle exists, and thus the harmonic and power factor values of the input current are deteriorated.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a novel three-phase four-wire three-level BuckPFC rectifier system, which utilizes a Buck topological circuit structure, an IGBT without an anti-parallel diode and corresponding circuit control to realize the function of Power Factor Correction (PFC) of a Buck type three-phase four-wire three-level BuckPFC in an inductive Current Continuous Mode (CCM), thereby achieving the effects of reducing total harmonic distortion, improving Power factor and efficiently and stably working.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a novel three-phase four-wire three-level Buck PFC rectifier system comprises a main power circuit and a control circuit;
the control circuit is connected with the main power circuit, and the input voltage V of the control circuit is obtained from the main power circuit(abc)An output voltage VoutInductor current IL(abc)Sampling data;
the main power circuit consists of an A-phase three-level Buck PFC rectifier, a B-phase three-level Buck PFC rectifier and a C-phase three-level Buck PFC rectifier, wherein the A-phase three-level Buck PFC rectifier, the B-phase three-level Buck PFC rectifier and the C-phase three-level Buck PFC rectifier are connected in parallel in output and have the same structure;
the A-phase three-level Buck PFC rectifier comprises a power inductor LaPower MOSFET S1IGBT S without anti-parallel diode2、S3Fast recovery diode D1、D2、D3、D4An output filter capacitor Co1、Co2And a load R;
the fast recovery diode D1And a power MOSFET S1The D pole of (1) is connected; fast recovery diode D4One terminal of each of which is connected to the power MOSFET S1And IGBT S without an antiparallel diode3Is connected with the other end of the power inductor LaIs connected with one end of the connecting rod; fast recovery diode D1Power MOSFET S1Fast recovery diode D4Power inductor LaForming a loop;
the fast recovery diode D2And a power MOSFET S1The S pole of (1) is connected; fast recovery diode D3One terminal of each of which is connected to the power MOSFET S1And IGBT S without antiparallel diode2Is connected with the other end of the power inductor LaIs connected with one end of the connecting rod; fast recovery diode D2Power MOSFET S1Fast recovery diode D3Power inductor LaForming a loop;
the S pole of the IGBT S2 without the anti-parallel diode is connected with one end of an output filter capacitor Co 1; output filter capacitor Co1Another end and an output ofFilter capacitor Co2Is connected with one end of the connecting rod; output filter capacitor Co2And the other end of the IGBT S without an anti-parallel diode3D pole connection, power inductor LaKeep away from fast recovery diode D3And D4One end of each of the first and second capacitors is connected to an output filter capacitor Co1、Co2Connecting;
the power inductor LaAnd output filter capacitor Co2IGBT S without anti-parallel diode3Fast recovery diode D4Forming a loop;
the power inductor LaAnd a fast recovery diode D3IGBT S without anti-parallel diode2An output filter capacitor Co1Forming another loop;
the load R and the output filter capacitor Co1、Co2Are connected in series;
with the power MOSFET S in the A-phase three-level Buck PFC rectifier1Correspondingly, the B-phase three-level Buck PFC rectifier and the C-phase three-level Buck PFC rectifier are respectively provided with a power MOSFET S4And a power MOSFET S7。
Furthermore, the control circuit consists of an auxiliary power supply module, an input voltage detection module, an output voltage sampling module, an inductive current sampling module, a first drive circuit module, a second drive circuit module, a third drive circuit module, a PWM drive signal generation circuit module, a comparator, an adder, an integrator and an error amplifier;
the input voltage detection module and the output voltage sampling module are respectively connected with a corresponding voltage input end and a corresponding voltage output end in the main power circuit;
the first drive circuit module is connected with the PWM drive signal generation circuit module and is used for driving the power MOSFETs1Power MOSFET S4Power MOSFET S7Opening and closing of (1);
the second driving circuit module and the third driving circuit module are respectively connected between the input voltage detection module and the PWM driving signal generation circuit module;
the output voltage sampling module, the error amplifier, the adder, the comparator and the PWM driving signal generating circuit module are sequentially connected;
the integrator is connected between the error amplifier and the comparator;
the inductive current sampling module is connected between one end of each power inductor and the adder.
Furthermore, the input voltage detection module consists of three input voltage detection circuits, which respectively correspond to the three-phase voltage input ends; each input voltage detection circuit comprises a conversion circuit, a bidirectional voltage stabilizing diode and an operational amplifier; the bidirectional voltage stabilizing diode is connected between the conversion circuit and the operational amplifier;
the conversion circuit is composed of a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor.
Compared with the prior art, the principle and the advantages of the scheme are as follows:
this scheme utilizes Buck topological circuit structure, does not take the IGBT of anti-parallel diode and through corresponding circuit control through novel three-phase four-wire system three-level Buck PFC rectifier system, realizes the function that three-level power factor of inductive Current Continuous Mode (CCM) Buck type three-phase four-wire system was rectified, reaches the effect that reduces total harmonic distortion, improvement power factor and high-efficient stable work.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the services required for the embodiments or the technical solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of a novel three-phase four-wire system three-level Buck PFC rectifier system according to the present invention;
FIG. 2 is a schematic diagram of a three-phase four-wire three-level Buck PFC rectifier in the novel three-phase four-wire three-level Buck PFC rectifier system of the invention;
FIG. 3 is a topological structure diagram of a physically decoupled single-phase three-level Buck PFC rectifier;
FIG. 4 shows one of the operation modes of FIG. 3 during the positive half cycle of the AC input;
FIG. 5 shows a second mode of operation of FIG. 3 during a positive half cycle of the AC input;
FIG. 6 shows one of the operation modes of FIG. 3 during the negative half cycle of the AC input;
FIG. 7 shows a second mode of operation of FIG. 3 during negative half cycles of AC input;
FIG. 8 is a schematic structural diagram of an input voltage detection module;
FIG. 9 is a waveform diagram of key signals of the input voltage detecting module;
FIG. 10 is a graph of output voltage waveforms after simulation;
FIG. 11 is a graph of input voltage and input current waveforms after simulation;
FIG. 12 is a circuit diagram of an output voltage sampling module;
FIG. 13 is a circuit diagram of an inductor current sampling module;
FIG. 14 is a circuit diagram of the first, second and third driving circuit modules;
fig. 15 is a circuit diagram of the PWM driving signal generating circuit block.
Detailed Description
The invention will be further illustrated with reference to specific examples:
as shown in fig. 1, the novel three-phase four-wire three-level Buck PFC rectifier system according to this embodiment includes two parts, namely a main power circuit 1 and a control circuit 2.
As shown in FIG. 2, the first part of the main power circuit 1 comprises an A-phase three-level Buck PFC rectifier, a B-phase three-level Buck PFC rectifier and a C-phase three-level Buck PFC rectifier which are connected in parallel and have the same output and the same structure, wherein the A-phase three-level Buck PFC rectifier comprises a power inductor LaPower MOSFET S1IGBT S without anti-parallel diode2、S3Fast recovery diode D1、D2、D3、D4An output filter capacitor Co1、Co2And a load R.
In an A-phase three-level Buck PFC rectifier, a fast recovery diode D1And a power MOSFET S1The D pole of (1) is connected; fast recovery diode D4One terminal of each of which is connected to the power MOSFET S1And IGBT S without an antiparallel diode3Is connected with the other end of the power inductor LaIs connected with one end of the connecting rod; fast recovery diode D1Power MOSFET S1Fast recovery diode D4Power inductor LaForming a loop.
Fast recovery diode D2And a power MOSFET S1The S pole of (1) is connected; fast recovery diode D3One terminal of each of which is connected to the power MOSFET S1And IGBT S without antiparallel diode2Is connected with the other end of the power inductor LaIs connected with one end of the connecting rod; fast recovery diode D2Power MOSFET S1Fast recovery diode D3Power inductor LaForming a loop.
IGBT S without anti-parallel diode2S pole and output filter capacitor Co1Is connected with one end of the connecting rod; output filter capacitor Co1Another end of (1) and an output filter capacitor Co2Is connected with one end of the connecting rod; output filter capacitor Co2And the other end of the IGBT S without an anti-parallel diode3D pole connection, power inductor LaKeep away from fast recovery diode D3And D4One end of each of the first and second capacitors is connected to an output filter capacitor Co1、Co2And (4) connecting.
Power inductor LaAnd output filter capacitor Co2IGBT S without anti-parallel diode3Fast recovery diode D4Forming a loop, a power inductor LaAnd a fast recovery diode D3IGBT S without anti-parallel diode2An output filter capacitor Co1Forming another loop; load R and the output filter capacitor Co1、Co2Are connected in series.
And the B-phase three-level Buck PFC rectifier comprises a power inductor LbPower MOSFET S4IGBT S without anti-parallel diode5、S6Fast recovery diode D5、D6、D7、D8An output filter capacitor Co1、Co2And a load R.
The C-phase three-level Buck PFC rectifier comprises a power inductor LcPower MOSFET S7IGBT S without anti-parallel diode8、S9Fast recovery diode D9、D10、D11、D12An output filter capacitor Co1、Co2And a load R.
The second partial control circuit 2 is connected to the main power circuit 1 and receives its input voltage V from the main power circuit 1(abc)An output voltage VoutInductor current IL(abc)The sampling data specifically comprises an auxiliary power supply module 2-1, an input voltage detection module 2-2, an output voltage sampling module 2-3, an inductive current sampling module 2-4, a first drive circuit module 2-5, a second drive circuit module 2-11, a third drive circuit module 2-12, a PWM drive signal generation circuit module 2-6, a comparator 2-7, an adder 2-8, an integrator 2-9 and an error amplifier 2-10.
The input voltage detection module 2-2 and the output voltage sampling module 2-3 are respectively connected with a corresponding voltage input end and a corresponding voltage output end in the main power circuit 1.
The first driving circuit module 2-5 is connected with the PWM driving signal generating circuit module 2-6 for driving the power MOSFET S1Power MOSFET S4Power MOSFET S7Opening and closing of (3).
The second drive circuit module 2-11 and the third drive circuit module 2-12 are respectively connected between the input voltage detection module 2-2 and the PWM drive signal generation circuit module 2-6, and respectively control the IGBT S without the anti-parallel diode3、S6、S9And IGBT S without antiparallel diode2、S5、S8Opening and closing of (3).
The output voltage sampling module 2-3, the error amplifier 2-10, the adder 2-8, the comparator 2-7 and the PWM driving signal generating circuit module 2-6 are sequentially connected.
The integrator 2-9 is connected between the error amplifier 2-10 and the comparator 2-7.
The inductor current sampling modules 2-4 are connected between one end of each power inductor and the summers 2-8.
Specifically, as shown in fig. 8, the input voltage detection module 2-2 is composed of three input voltage detection circuits, which respectively correspond to the voltage input terminals of three phases; each input voltage detection circuit comprises a conversion circuit, a bidirectional voltage stabilizing diode and an operational amplifier; the bidirectional voltage stabilizing diode is connected between the conversion circuit and the operational amplifier.
The conversion circuit is composed of a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor.
In this embodiment, the output voltage sampling module 2-3 is shown in fig. 12.
Inductor current sampling modules 2-4 are shown in fig. 13.
The first, second and third driving circuit modules 2-5, 2-11 and 2-12 are all shown in fig. 14.
The PWM drive signal generation circuit block 2-6 is shown in fig. 15.
In the control circuit 2, firstly, the output voltage sampling value v is collected by the output voltage sampling module 2-3oAnd sampling the output voltage value voAn error voltage value v is obtained by the reference voltage vref and the error amplifier 2-10mThen v ismThe value is sent to an adder 2-8 and an inductive current sampling value i all the way(abc)Summing to obtain V1(abc)One path of the value is sent to an integrator 2-9 to be integrated to obtain V2Value of, finally V1(abc)And V2Sending the PWM signal to comparators 2-7 to obtain PWM driving signal P1(abc)、P2(abc)Driving signal P1(abc)And P2(abc)Two complementary PWM signals.
In addition, the input voltage V is adjusted(abc)Sending the voltage to the input voltage detection module 2-2 to judge the polarity of the input voltage, if V is judged(abc)When the output voltage is more than 0, the second drive circuit module 2-11 outputs a drive signal PS3、PS6、PS9At this time, the third driving circuit module 2-12 does not output the driving signal(ii) a If V is judged(abc)<At 0, the third driving circuit module 2-12 outputs the driving signal PS2、PS5、PS8At this time, the second driving circuit module 2-11 does not output a driving signal; thereby turning on or off the corresponding IGBTS without the anti-parallel diode3、S6、S9And S2、S5、S8. The main power circuit 1 can realize the purpose of power factor correction through the accurate control of the control circuit 2.
In this embodiment, the topological structure of the novel three-phase four-wire three-level Buck PFC rectifier after physical decoupling is shown in fig. 3.
Because of the three-phase power balance, the load resistance is 3R for each of the A, B, C three-phase power. The working principle of the B-phase and C-phase electrical input is the same as that of the A-phase, and the detailed analysis is performed on each working mode of the topological structure of the three-level BuckPFC rectifier after the A-phase electrical input is physically decoupled.
When the alternating current is input for a positive half cycle, the phase can be divided into the following two working modes:
the first working mode is as follows:
the first driver circuit module 2-5 controls the power MOSFET S when the AC input is a positive half cycle1Conducting IGBT S without antiparallel diode2And S3In the off state. Input current fast recovery diode D1、D4Power MOSFETS1Power inductor LaThen forms a loop through the neutral wire to power inductor LaAnd storing energy. Filter capacitor C with simultaneous outputo1、Co2The load is energized during which time the circuit operates as shown in figure 4.
The second working mode is as follows:
when power MOSFET S1When the AC input is turned off, the input voltage detection module 2-2 detects that the AC input is a positive half cycle and V(abc)When the voltage is more than 0, the second driving circuit module 2-11 outputs PWM driving signals to the IGBT S without the anti-parallel diode3So that the IGBT S without the antiparallel diode3Is conducted toTime power MOSFET S1And IGBT S without antiparallel diode2In the off state, power inductor LaThe energy is released, the inductive current linearly decreases, and the current passes through the output filter capacitor Co2IGBT S without antiparallel diode3Then through a fast recovery diode D4Form a loop to the filter capacitor Co2And charging is carried out. Filter capacitor C with simultaneous outputo1、Co2The load is energized during which time the circuit operates as shown in figure 5.
When the alternating current is input for a negative half cycle, the phase can be divided into the following two working modes:
the working mode is three:
the first driver circuit module 2-5 controls the power MOSFET S when the AC input is negative half cycle1Conducting IGBT S without antiparallel diode2And S3In the off state. Input current fast recovery diode D2、D3Power MOSFETS1Power inductor L, then looped through the neutral conductor to power inductor LaAnd storing energy. Filter capacitor C with simultaneous outputo1、Co2The load is energized during which time the circuit operates as shown in figure 6.
Working mode four:
when power MOSFET S1When the AC input is turned off, the input voltage detection module 2-2 detects that the AC input is a negative half cycle and V(abc)<0, the third driving circuit module 2-12 outputs PWM driving signals to the IGBT S without the anti-parallel diode2So that the IGBT S without the antiparallel diode2Is turned on when the power MOSFET S1And IGBT S without antiparallel diode3In the off state, power inductor LaThe energy is released, the inductive current linearly decreases, and the current passes through the output filter capacitor Co1IGBT S without antiparallel diode2Then through a fast recovery diode D3Form a loop to the filter capacitor Co1And charging is carried out. Filter capacitor C with simultaneous outputo1、Co2The load is energized during which time the circuit operates as shown in figure 7.
Furthermore, as can be seen from the above, three power MOSFETs S exist in the novel three-phase four-wire three-level Buck PFC rectifier circuit topology1、S4、S7And IGBT S without antiparallel diode2、S3、S5、S6、S8、S9Therefore, the polarity of A, B, C three-phase input voltage needs to be judged so as to select the corresponding IGBT without the anti-parallel diode to work when the input voltage is determined to be in different polarities.
First of all, ACa/Vb/VcBy R1a/R1b/R1cAnd R2a/R2b/R2cAnd R3a/R3b/R3cAnd R4a/R4b/R4cThe voltage dividing resistor converts input alternating voltage into small-signal alternating current, and a bidirectional voltage stabilizing diode (TVS) is added, so that the function of protecting an operational amplifier (OPAMP) is achieved when the circuit is abnormal. The output signals ua/ub/uc are high level or low level through comparison of two input ends of OPAMP1/OPAMP2/OPAMP3, when the alternating voltage input is in a positive half period, the potential of a non-inverting input end of OPAMP1/OPAMP2/OPAMP3 is positive, the potential of an inverting input end is negative, and the OPAMP1/OPAMP2/OPAMP3 outputs high level; conversely, when the AC voltage input is negative half cycles, OPAMP1/OPAMP2/OPAMP3 outputs a low level. Thereby gating the corresponding driving circuit. The waveforms of the key signals of the input voltage detection module are shown in fig. 9.
To demonstrate the effectiveness of this embodiment, the present example was simulated using the simulation software PSIM to obtain the output voltage waveform shown in fig. 10 and the input voltage and input current waveforms shown in fig. 11.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that variations based on the shape and principle of the present invention should be covered within the scope of the present invention.

Claims (3)

1. A novel three-phase four-wire three-level Buck PFC rectifier system is characterized by comprising a main power circuit (1) and a control circuit (2);
the control circuit (2) is connected with the main power circuit (1), and the input voltage V (V) of the control circuit is obtained from the main power circuit (1)abc) An output voltage VoutInductor current IL(abc) Sampling data;
the main power circuit (1) consists of an A-phase three-level Buck PFC rectifier, a B-phase three-level Buck PFC rectifier and a C-phase three-level Buck PFC rectifier, wherein the A-phase three-level Buck PFC rectifier, the B-phase three-level Buck PFC rectifier and the C-phase three-level Buck PFC rectifier are connected in parallel in output and have the same structure;
the A-phase three-level Buck PFC rectifier comprises a power inductor LaPower MOSFET S1IGBT S without anti-parallel diode2、S3Fast recovery diode D1、D2、D3、D4An output filter capacitor Co1、Co2And a load R;
the fast recovery diode D1And a power MOSFET S1The D pole of (1) is connected; fast recovery diode D4One terminal of each of which is connected to the power MOSFET S1And IGBT S without an antiparallel diode3Is connected with the other end of the power inductor LaIs connected with one end of the connecting rod; fast recovery diode D1Power MOSFET S1Fast recovery diode D4Power inductor LaForming a loop;
the fast recovery diode D2And a power MOSFET S1The S pole of (1) is connected; fast recovery diode D3One terminal of each of which is connected to the power MOSFET S1And IGBT S without antiparallel diode2Is connected with the other end of the power inductor LaIs connected with one end of the connecting rod; fast recovery diode D2Power MOSFET S1Fast recovery diode D3Power inductor LaForming a loop;
the IGBT S without the anti-parallel diode2S pole and output filter capacitor Co1Is connected with one end of the connecting rod; output filter capacitor Co1And the other end of the output filter capacitor Co2Is connected with one end of the connecting rod; output filter capacitor Co2And the other end of the IGBT S without an anti-parallel diode3D pole connection, power inductor LaKeep away from fast recovery diode D3And D4One end of the output filter capacitor Co is connected with the output filter capacitor Co1、Co2Connecting;
the power inductor LaAnd output filter capacitor Co2IGBT S without anti-parallel diode3Fast recovery diode D4Forming a loop;
the power inductor LaAnd a fast recovery diode D3IGBT S without anti-parallel diode2Output filter capacitor Co1Forming another loop;
the load R and the output filter capacitor Co1、Co2Are connected in series;
with the power MOSFET S in the A-phase three-level Buck PFC rectifier1Correspondingly, the B-phase three-level Buck PFC rectifier and the C-phase three-level Buck PFC rectifier are respectively provided with a power MOSFET S4And a power MOSFET S7。
2. The novel three-phase four-wire three-level Buck PFC rectifier system according to claim 1, wherein the control circuit (2) is composed of an auxiliary power supply module (2-1), an input voltage detection module (2-2), an output voltage sampling module (2-3), an inductive current sampling module (2-4), a first drive circuit module (2-5), a second drive circuit module (2-11), a third drive circuit module (2-12), a PWM drive signal generation circuit module (2-6), a comparator (2-7), an adder (2-8), an integrator (2-9) and an error amplifier (2-10);
the input voltage detection module (2-2) and the output voltage sampling module (2-3) are respectively connected with a corresponding voltage input end and a corresponding voltage output end in the main power circuit (1);
the first drive circuit module (2-5) is connected with the PWM drive signal generation circuit module (2-6) and is used for driving the power MOSFET S1Power MOSFET S4Power MOSFET S7Opening and closing of (1);
the second driving circuit module (2-11) and the third driving circuit module (2-12) are respectively connected between the input voltage detection module (2-2) and the PWM driving signal generation circuit module (2-6);
the output voltage sampling module (2-3), the error amplifier (2-10), the adder (2-8), the comparator (2-7) and the PWM driving signal generating circuit module (2-6) are sequentially connected;
the integrator (2-9) is connected between the error amplifier (2-10) and the comparator (2-7);
and the inductance current sampling modules (2-4) are connected between one end of each power inductor and the summers (2-8).
3. The novel three-phase four-wire three-level Buck PFC rectifier system according to claim 2, wherein the input voltage detection module (2-2) is composed of three input voltage detection circuits, which respectively correspond to three-phase voltage input terminals; each input voltage detection circuit comprises a conversion circuit, a bidirectional voltage stabilizing diode and an operational amplifier; the bidirectional voltage stabilizing diode is connected between the conversion circuit and the operational amplifier;
the conversion circuit is composed of a first voltage dividing resistor, a second voltage dividing resistor, a third voltage dividing resistor and a fourth voltage dividing resistor.
CN202010305536.XA 2020-04-17 2020-04-17 Novel three-phase four-wire system three-level Buck PFC rectifier system Pending CN111431420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010305536.XA CN111431420A (en) 2020-04-17 2020-04-17 Novel three-phase four-wire system three-level Buck PFC rectifier system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010305536.XA CN111431420A (en) 2020-04-17 2020-04-17 Novel three-phase four-wire system three-level Buck PFC rectifier system

Publications (1)

Publication Number Publication Date
CN111431420A true CN111431420A (en) 2020-07-17

Family

ID=71554258

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010305536.XA Pending CN111431420A (en) 2020-04-17 2020-04-17 Novel three-phase four-wire system three-level Buck PFC rectifier system

Country Status (1)

Country Link
CN (1) CN111431420A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366962A (en) * 2020-11-03 2021-02-12 哈尔滨工业大学 Three-phase three-level rectifier based on three-winding isolation transformer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108683330A (en) * 2018-05-25 2018-10-19 宋庆国 A kind of three switching tube three-phase pfc circuit control methods and serial topological structure
CN211959080U (en) * 2020-04-17 2020-11-17 广东工业大学 Buck three-phase four-wire three-level PFC rectifier system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108683330A (en) * 2018-05-25 2018-10-19 宋庆国 A kind of three switching tube three-phase pfc circuit control methods and serial topological structure
CN211959080U (en) * 2020-04-17 2020-11-17 广东工业大学 Buck three-phase four-wire three-level PFC rectifier system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366962A (en) * 2020-11-03 2021-02-12 哈尔滨工业大学 Three-phase three-level rectifier based on three-winding isolation transformer

Similar Documents

Publication Publication Date Title
CN113224942B (en) Non-isolated Buck-Boost bridgeless PFC converter system
CN107896069A (en) A kind of New single-phase mixes three-level rectifier
CN104038045B (en) high power factor correction control circuit and device
CN104852567A (en) Totem-pole bridgeless power factor correction circuit of soft switch
CN103166489A (en) Control circuit for three-phase high power factor rectifier
CN107623436B (en) PFC power supply device
CN211630095U (en) Single-phase three-level Buck PFC rectifier
CN111431394A (en) Novel step-down single-phase three-level bridgeless PFC converter system
WO2021208274A1 (en) Power factor adjustment architecture applicable to single-phase/three-phase power grid, and control method therefor
CN104269999A (en) Closed loop starting method for resonant converter
CN102427293A (en) Low output ripple wave parallel power-factor correction (PFC) transform control method and device
CN212850263U (en) Novel OCC voltage-reducing PFC circuit
CN211959064U (en) Novel non-isolated Buck PFC converter system
CN203617902U (en) Integrated buck-flyback type high power factor constant current circuit and device
CN111342684B (en) Single-phase three-level Buck PFC rectifier and control method thereof
CN203151389U (en) Control circuit of three-phase high power factor rectifier
CN211959080U (en) Buck three-phase four-wire three-level PFC rectifier system
CN113765359A (en) Multi-unit parallel connection integrated voltage reduction bridgeless PFC converter
CN203636178U (en) Inverter welder
CN111431420A (en) Novel three-phase four-wire system three-level Buck PFC rectifier system
CN105226932A (en) High efficiency circuit of power factor correction topological structure and control method thereof
CN113251395A (en) Steam generator&#39;s controlling means based on electromagnetic induction heating technique
CN112087128A (en) Staggered bridgeless Buck PFC rectifier system
CN113271003B (en) PFC conversion circuit of uninterruptible power supply and control method
CN208209833U (en) Highpowerpulse load power source device with fast dynamic response

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination