CN105429490B - A kind of three-phase PFC switching power circuits - Google Patents
A kind of three-phase PFC switching power circuits Download PDFInfo
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- CN105429490B CN105429490B CN201510844069.7A CN201510844069A CN105429490B CN 105429490 B CN105429490 B CN 105429490B CN 201510844069 A CN201510844069 A CN 201510844069A CN 105429490 B CN105429490 B CN 105429490B
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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
- 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
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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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Abstract
The invention discloses a kind of three-phase PFC switching power circuits, including interleaved parallel PFC circuit, three-phase input power supply and DC output end, interleaved parallel PFC circuit includes the staggered parallel PFC circuits of two-way n and rectifier circuit；Phase difference between the same staggered each branches of parallel PFC circuit of n is 360/n degree, first phase of the input termination three-phase input power supply of the staggered parallel PFC circuits of first via n, the second phase of the input termination three-phase input power supply of the staggered parallel PFC circuits of the second road n；Rectifier circuit includes the first diode and the second diode, and the anode of the first diode connects the cathode of DC output end, and cathode connects the anode of the second diode, and the cathode of the second diode connects the anode of DC output end；The second of three-phase input power supply connects the cathode of the first diode.The present invention can further increase pfc circuit efficiency and power factor, have broad application prospects under the premise of circuit reliability is basically unchanged.
Description
[technical field]
The present invention relates to high frequency switch power more particularly to a kind of three-phase PFC switching power circuits.
[background technology]
With the development of switch power technology, since input harmonic current limits, three-phase PFC (power factor
Correction, PFC) circuit becomes an indispensable part in Switching Power Supply, and the volume of Switching Power Supply
It is required that smaller and smaller, power requirement is increasing, efficiency requirements are higher and higher, and the energy is saved with this.
As shown in Figure 1, the circuit of six pipe three-phase PFC of tradition is relatively easy, generally by switch transistor rectifier bridge, three pole reactor,
Switching device, output capacitance composition, this three-phase pfc circuit can realize energy in bidirectional flow, and general switching frequency is relatively low, inductance
Volume is larger, is unfavorable for improving power density, this circuit generally uses vector controlled, control more complex.
With technological progress, three-phase Vienna pfc circuit be one well selection, three-phase pfc circuit can decoupling control,
Energy one-way flow, canonical topology are shown in that the use double-bus capacitance of Fig. 2 but three-phase Vienna PFC, output diode can reduce
Efficiency, cost is higher, and the voltage of two output capacitances is easy imbalance.
[invention content]
The technical problem to be solved in the present invention is to provide a kind of high efficiency, the three-phase PFC switch power supplies of High Power Factor
Road.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is a kind of three-phase PFC switching power circuits,
Including interleaved parallel PFC circuit, three-phase input power supply and DC output end, interleaved parallel PFC circuit includes two-way n staggered simultaneously
Join pfc circuit and rectifier circuit；Include n branch per the staggered parallel PFC circuits of road n, every branch includes inductance, first
Switching tube and second switch pipe；The anode of first termination DC output end of first switch pipe, second terminate second switch pipe
First termination first switch pipe and second of first end, the cathode of the second termination DC output end of second switch pipe, inductance is opened
Close the tie point of pipe, the input terminal of the second termination staggered parallel PFC circuits of n；The same staggered each branches of parallel PFC circuit of n
Between phase difference be 360/n degree, the staggered parallel PFC circuits of first via n input termination three-phase input power supply first
Phase, the third phase of the input termination three-phase input power supply of the staggered parallel PFC circuits of the second road n；Rectifier circuit includes first
The anode of diode and the second diode, the first diode connects the cathode of DC output end, and cathode connects the anode of the second diode,
The cathode of second diode connects the anode of DC output end；The second of three-phase input power supply connects the cathode of the first diode.
Above-described three-phase PFC switching power circuits, the switching tube are metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects directly
Anode, the source electrode of stream output end connect the drain electrode of the second metal-oxide-semiconductor, and the source electrode of the second metal-oxide-semiconductor connects the cathode of DC output end.
The alternating voltage of above-described three-phase PFC switching power circuits, the input terminal of the staggered parallel PFC circuits of n exists
When positive half cycle works, the second metal-oxide-semiconductor and the first metal-oxide-semiconductor body diode form PFC high-frequency circuits, the conducting of the second metal-oxide-semiconductor, inductance storage
Can, the second metal-oxide-semiconductor shutdown, inductance is released energy by the first metal-oxide-semiconductor body diode；The input terminal of the staggered parallel PFC circuits of n
Alternating voltage when negative half period works, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor body diode form PFC high-frequency circuits, the first MOS
Pipe is connected, inductive energy storage, and the first metal-oxide-semiconductor shutdown, inductance is released energy by the second metal-oxide-semiconductor body diode.
Above-described three-phase PFC switching power circuits, including voltage sampling circuit, per the staggered parallel PFC circuits of road n
Including one circle control chip, current sampling circuit and alternating voltage sampling circuit, voltage sampling circuit is staggered simultaneously to every road n
The output voltage of connection pfc circuit is sampled, and is compared with one circle control chip interior voltage given value, the output of gained
As signal Vm；Signal Vm is integrated in switch non-conduction cycle T time to obtain V1 (t), inductive current is sampled
Sample rate current I is obtained, I × Rs is compared with signal Vm, gained output is V2 (t), and wherein Rs is current sampling resistor；
When duty ratio d (t) meets V1 (t)=∫ Vm × d (t), when V2 (t)=Vm-I × Rs, pass through rest-set flip-flop output pwm signal；It hands over
It flows voltage sampling circuit and electric resistance partial pressure sampling is carried out to the alternating voltage of the staggered parallel PFC circuits of n, be input to comparator, obtain
After inputting positive-negative polarity signal to alternating voltage and carrying out logic XOR synthesis with rest-set flip-flop output pwm signal, metal-oxide-semiconductor is obtained
Switching drive signal, to complete closed-loop control；Wherein, I × Rs=(Vo × Rs/Re) × (1-d (t)), wherein Vo n
The output voltage of staggered parallel PFC circuit, the equivalent resistance that Re is the power factor of the staggered parallel PFC circuits of n when being 1.
Three-phase PFC switching power circuits of the present invention can further increase under the premise of circuit reliability is basically unchanged
Pfc circuit efficiency and power factor, have broad application prospects.
[description of the drawings]
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the schematic diagram of the circuit of six pipe three-phase PFC of the prior art.
Fig. 2 is the schematic diagram of prior art three-phase Vienna pfc circuit.
Fig. 3 is the schematic diagram of three-phase PFC switching power circuits of the embodiment of the present invention.
Fig. 4 is three-phase PFC switching power circuits of the embodiment of the present invention and the schematic diagram of control circuit.
Fig. 5 is one circle control circuit diagram of the embodiment of the present invention.
[specific implementation mode]
The principle of three-phase PFC switching power circuits of the embodiment of the present invention is as shown in Figures 3 to 5.
Three-phase PFC switching power circuits include that interleaved parallel PFC circuit, three-phase input power supply, filter capacitor C and direct current are defeated
Outlet, interleaved parallel PFC circuit include the staggered parallel PFC circuits of two-way n and rectifier circuit.Per the staggered parallel PFCs of road n
Circuit includes n branch, and every branch includes inductance, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor.It is defeated that the drain electrode of first metal-oxide-semiconductor connects direct current
Anode, the source electrode of outlet connect the drain electrode of the second metal-oxide-semiconductor, and the source electrode of the second metal-oxide-semiconductor connects the cathode of DC output end.The first of inductance
Terminate the tie point of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor, the input terminal of the second termination staggered parallel PFC circuits of n.Same n intersections
Phase difference between wrong each branch of parallel PFC circuit is 360/n degree, and the input of the staggered parallel PFC circuits of first via n terminates
The A phases of three-phase input power supply, the C phases of the input termination three-phase input power supply of the staggered parallel PFC circuits of the second road n.Rectifier bridge
Circuit includes diode D6 and diode D5, and the anode of diode D6 connects the cathode of DC output end, and cathode connects diode D5's
The cathode of anode, diode D5 connects the anode of DC output end.The B of three-phase input power supply connects the cathode of diode D6.
The alternating voltage of the input terminal of the staggered parallel PFC circuits of n is when positive half cycle works, the second metal-oxide-semiconductor and the first MOS
Tube body diode forms PFC high-frequency circuits, and the second metal-oxide-semiconductor is connected, inductive energy storage, and the second metal-oxide-semiconductor shutdown, inductance passes through first
Metal-oxide-semiconductor body diode releases energy.The alternating voltage of the input terminal of the staggered parallel PFC circuits of n is when negative half period works, and first
Metal-oxide-semiconductor and the second metal-oxide-semiconductor body diode form PFC high-frequency circuits, and the first metal-oxide-semiconductor is connected, inductive energy storage, the shutdown of the first metal-oxide-semiconductor,
Inductance is released energy by the second metal-oxide-semiconductor body diode.
By taking the first branch of A phases as an example, when alternating voltage Vao positive half cycles work, the body of metal-oxide-semiconductor Q21 and metal-oxide-semiconductor Q11
Diode forms PFC high-frequency circuits, and metal-oxide-semiconductor Q21 is connected, inductance L11 energy storage, and metal-oxide-semiconductor Q21 shutdowns, inductance L11 passes through metal-oxide-semiconductor
Q11 body diodes release energy.When alternating voltage Vao negative half periods work, metal-oxide-semiconductor Q11 and metal-oxide-semiconductor Q21 body diodes composition
PFC high-frequency circuits, metal-oxide-semiconductor Q11 conductings, inductance L11 energy storage, metal-oxide-semiconductor Q11 shutdowns, inductance L11 pass through metal-oxide-semiconductor Q21 body diodes
It releases energy.
Similarly, for the second branch of A phases, when alternating voltage Vao positive half cycles work, metal-oxide-semiconductor Q22 and metal-oxide-semiconductor Q12 bodies
Diode forms PFC high-frequency circuits, and metal-oxide-semiconductor Q22 is connected, inductance L12 energy storage, and metal-oxide-semiconductor Q22 shutdowns, inductance L12 passes through metal-oxide-semiconductor
Q12 body diodes release energy.When alternating voltage Vao negative half periods work, metal-oxide-semiconductor Q12 and metal-oxide-semiconductor Q22 body diodes composition
PFC high-frequency circuits, metal-oxide-semiconductor Q12 conductings, inductance L12 energy storage, metal-oxide-semiconductor Q12 shutdowns, inductance L12 pass through metal-oxide-semiconductor Q22 body diodes
It releases energy.
The first via interleaved parallel PFC circuit that the second road interleaved parallel PFC circuit being connected with C is connected with A
Operation principle is identical.
Since the other end of the other end of AC three-phase Vao, the other end of Vbo and Vco is connected together, B circuitry phases can be with
The automatic balance for realizing power.
Since the body diode output characteristics of metal-oxide-semiconductor is poor, the circuit of the embodiment of the present invention uses critical continuous mode electric current
(CRM) mode, control use monocycle chip controls, only hand over A phases first via interleaved parallel PFC circuit and the second tunnel of C phases
Wrong parallel PFC circuit individually controls, B phase current automatic equalizations.
The control method of the embodiment of the present invention is as follows：Include one circle control chip per the staggered parallel PFC circuits of road n
R2120112A, current sampling circuit and alternating voltage sampling circuit.Control with A phases staggered parallel PFC circuits of n all the way is
Example, has formula for the staggered parallel PFC circuits of n in the case of continuous current mode：
Vin=Vo × (1-d (t)) (1)
Wherein Vin is PFC input voltages, and Vo is PFC output voltages, and d (t) is duty ratio.When pfc circuit power factor is
When 1, entire pfc circuit is equivalent to a resistance Re.
So there is formula satisfaction：
Vin=I × Re=Vo × (1-d (t)) (2)
Wherein I is the input current of the staggered parallel PFC circuits of n all the way, and Vo is the staggered parallel PFC circuits of n all the way
Output voltage, d (t) are duty ratio.
Formula (3) can be obtained according to formula (2)：
I × Rs=(Vo × Rs/Re) × (1-d (t)) (3)
It is a voltage for being proportional to Vo to enable Vm=Vo × Rs/Re, Vm, it is known that：
Vm × d (t)=Vm-I × Rs (4)
Enable V1 (t)=∫ Vm × d (t), V2 (t)=Vm-I × Rs (5)
The output voltage Vo of pfc circuit is sampled, it is given with one circle control chip R2120112A builtin voltages
Vref is compared, and gained output is used as signal Vm, is integrated in switch non-conduction cycle T time to obtain V1 to signal Vm
(t)；Inductance L11 electric currents are sampled to obtain I × Rs, are compared with signal Vm, gained output is V2 (t)；As duty ratio d
(t) when meeting formula (5), pass through rest-set flip-flop output pwm signal.
Electric resistance partial pressure sampling is carried out to alternating voltage Vao, is input to comparator, obtains alternating voltage input positive-negative polarity letter
Number and rest-set flip-flop output pwm signal carry out logic XOR synthesis after, switching drive signal is obtained, to complete closed-loop control.
It similarly can control C phase another way interleaved parallel PFC circuits.Circuit entire so just completes closed-loop control.
Claims (4)
1. a kind of three-phase PFC switching power circuits, which is characterized in that including interleaved parallel PFC circuit, three-phase input power supply and straight
Output end is flowed, interleaved parallel PFC circuit includes the staggered parallel PFC circuits of two-way n and rectifier circuit；It is staggered simultaneously per road n
It includes n branch to join pfc circuit, and every branch includes inductance, first switch pipe and second switch pipe；The first of first switch pipe
Terminate the anode of DC output end, the first end of the second termination second switch pipe, the second termination direct current output of second switch pipe
The cathode at end, the tie point of the first termination first switch pipe and second switch pipe of inductance, the second termination staggered parallel PFCs of n
The input terminal of circuit；Phase difference between the same staggered each branches of parallel PFC circuit of n is 360/n degree, first via n intersections
First phase of the input termination three-phase input power supply of wrong parallel PFC circuit, the input terminal of the staggered parallel PFC circuits of the second road n
Connect the third phase of three-phase input power supply；Rectifier circuit includes the first diode and the second diode, the anode of the first diode
The cathode of DC output end is connect, cathode connects the anode of the second diode, and the cathode of the second diode connects the anode of DC output end；
The second of three-phase input power supply connects the cathode of the first diode.
2. three-phase PFC switching power circuits according to claim 1, which is characterized in that the switching tube is metal-oxide-semiconductor,
The drain electrode of first metal-oxide-semiconductor connects the anode of DC output end, source electrode connects the drain electrode of the second metal-oxide-semiconductor, and the source electrode of the second metal-oxide-semiconductor connects direct current
The cathode of output end.
3. three-phase PFC switching power circuits according to claim 2, which is characterized in that the staggered parallel PFC circuits of n
For the alternating voltage of input terminal when positive half cycle works, the second metal-oxide-semiconductor and the first metal-oxide-semiconductor body diode form PFC high-frequency circuits, the
Two metal-oxide-semiconductors are connected, inductive energy storage, and the second metal-oxide-semiconductor shutdown, inductance is released energy by the first metal-oxide-semiconductor body diode；N is staggered
The alternating voltage of the input terminal of parallel PFC circuit is when negative half period works, the first metal-oxide-semiconductor and the second metal-oxide-semiconductor body diode composition
PFC high-frequency circuits, the conducting of the first metal-oxide-semiconductor, inductive energy storage, the shutdown of the first metal-oxide-semiconductor, inductance are released by the second metal-oxide-semiconductor body diode
Exoergic amount.
4. three-phase PFC switching power circuits according to claim 1, which is characterized in that including voltage sampling circuit, per road
The staggered parallel PFC circuits of n include one circle control chip, current sampling circuit and alternating voltage sampling circuit, voltage sample
Circuit samples the output voltage of the staggered parallel PFC circuits of every road n, with one circle control chip interior voltage given value
It is compared, the output of gained is as signal Vm；Signal Vm is integrated in switch non-conduction cycle T time to obtain V1 (t),
Inductive current is sampled to obtain sample rate current I, I × Rs is compared with signal Vm, gained output is V2 (t), wherein
Rs is current sampling resistor；When duty ratio d (t) meets V1 (t)=∫ Vm × d (t), when V2 (t)=Vm-I × Rs, touched by RS
Send out device output pwm signal；Alternating voltage sampling circuit carries out electric resistance partial pressure to the alternating voltage of the staggered parallel PFC circuits of n and adopts
Sample is input to comparator, obtains alternating voltage input positive-negative polarity signal and carries out logic with rest-set flip-flop output pwm signal
After XOR synthesis, the switching drive signal of metal-oxide-semiconductor is obtained, to complete closed-loop control；Wherein, I × Rs=(Vo × Rs/Re) ×
(1-d (t)), wherein Vo be the staggered parallel PFC circuits of n output voltage, Re be the staggered parallel PFC circuits of n power because
Equivalent resistance when number is 1.
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| CN201510844069.7A CN105429490B (en) | 2015-11-26 | 2015-11-26 | A kind of three-phase PFC switching power circuits |
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| CN201510844069.7A CN105429490B (en) | 2015-11-26 | 2015-11-26 | A kind of three-phase PFC switching power circuits |
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| CN105429490B true CN105429490B (en) | 2018-09-04 |
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| CN109039116A (en) * | 2018-08-14 | 2018-12-18 | 浙江大学 | A kind of staggered-parallel-type high-frequency isolation type Three-Phase PWM Rectifier |
| CN110943607B (en) * | 2019-12-20 | 2021-04-06 | 武汉永力科技股份有限公司 | Single-cycle three-phase six-switch power factor correction PWM modulator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684472A (en) * | 2012-04-26 | 2012-09-19 | 华为技术有限公司 | Three-phase power factor correction circuit device |
| CN102739033A (en) * | 2012-06-23 | 2012-10-17 | 杭州中恒电气股份有限公司 | Interleaved parallel three-phase power factor correction circuit |
| CN204481681U (en) * | 2015-02-11 | 2015-07-15 | 深圳市高斯宝电气技术有限公司 | A kind of interleaved parallel PFC switching power circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9203298B2 (en) * | 2012-10-23 | 2015-12-01 | Huawei Technologies Co., Ltd. | Three-phase interleave converter with three-state switching cell |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684472A (en) * | 2012-04-26 | 2012-09-19 | 华为技术有限公司 | Three-phase power factor correction circuit device |
| CN102739033A (en) * | 2012-06-23 | 2012-10-17 | 杭州中恒电气股份有限公司 | Interleaved parallel three-phase power factor correction circuit |
| CN204481681U (en) * | 2015-02-11 | 2015-07-15 | 深圳市高斯宝电气技术有限公司 | A kind of interleaved parallel PFC switching power circuit |
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