CN108462384A - A kind of three-phase step-down type PFC rectification circuits - Google Patents
A kind of three-phase step-down type PFC rectification circuits Download PDFInfo
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- CN108462384A CN108462384A CN201810590608.2A CN201810590608A CN108462384A CN 108462384 A CN108462384 A CN 108462384A CN 201810590608 A CN201810590608 A CN 201810590608A CN 108462384 A CN108462384 A CN 108462384A
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- 238000005516 engineering process Methods 0.000 description 7
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- 230000000694 effects Effects 0.000 description 3
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4216—Arrangements for improving power factor of AC input operating from a three-phase input voltage
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
A kind of voltage-dropping type PFC rectification circuits, including three-phase voltage source circuit；Three-phase uncontrollable rectifier circuit, including three series circuits in parallel, every series circuit includes two diodes, and three series circuits and the three phase sine voltage source of three-phase voltage source circuit are separately connected；Three-phase active power factor corrects topological circuit, and input terminal connects the both ends in parallel of three-phase uncontrollable rectifier circuit；And active triple harmonic current injection circuit.Power factor (PF) of the present invention can reach 1.0, and output voltage is controllable；Low voltage can be exported in the case of no booster circuit；It is not required to realize three-phase decoupling, control is simple, simple in structure to be easy to implement.
Description
Technical field
The present invention relates to power factor correction technology field, especially a kind of voltage-dropping type PFC rectification circuits.
Background technology
Power factor correction technology (Power Factor Correction Technique) is power electronics educational circles and work
One basic technology in industry field, makes power grid and each electrical equipment with reducing high order current harmonics for inhibiting harmonic pollution
At harm.With the increase of electrical equipment, to electrical energy transformer also proposed high efficiency, high power density and high power because
Several requirements, therefore, various novel PFC transformation topologies are also come into being.
Currently, the research of single-phase power factor correcting technology is relatively more, all mutually treat as with control aspect in circuit topology
It is ripe, and the research of three-phase activity coefficient adjustment is then relatively late less.Research recently as PFC technologies is constantly goed deep into,
Three-phase PFC has attracted increasing attention.
Power factor correction technology is divided into two kinds of passive power factor correction and active power factor correction：Passive Power
Factor correcting uses passive device, such as LC to filter, although circuit structure is simple, efficient, power factor is taken by inductance
Value influences, and only up to reach 0.95, and output voltage is uncontrollable, so not being used in most cases；Three-phase active power
Topological structure Boost, Buck-Boost circuit because of factor correcting has boost function, it is ensured that input voltage is very wide
Range when input current it is continuous, but output voltage is still higher, for requiring the lower occasion of rectifier output voltage
It needs to connect reduction voltage circuit in rear class.
From the point of view of the quantity for using active power pipe, three-phase PFC can be divided into two classes, and one kind is single switch structure, Yi Leishi
Multi- Switch structure.Triphase single-switch Boost type pfc circuit, in order to realize that the decoupling between three-phase, three inductance are placed on exchange
Survey, and work in discontinuous conduct mode, its main feature is that current control is simple, but the input of the circuit, output current ripple compared with
Greatly, more demanding to filtered circuit, output voltage is excessively high, this brings certain difficulty to the selection of power tube, the circuit one
As be applied to output power and be less than 10kw and require electric current THD not stringent occasion.Although three-phase Multi- Switch can be with higher
Precision controlling input current, obtain excellent performance, but drive and control strategy is complicated, cost is higher, is suitable for larger work(
Rate occasion.
Invention content
The purpose of the present invention is to provide a kind of three-phase step-down type PFC rectification circuits, and the circuit structure is simple, using note
The mode for entering triple harmonic current realizes the purpose of PFC.
A kind of voltage-dropping type PFC rectification circuits, including：
Three-phase voltage source circuit is in 120 ° of three sinusoidal voltage sources by three and forms, and the one of three sinusoidal voltage sources
End connects together；
Three-phase uncontrollable rectifier circuit, including three series circuits in parallel, every series circuit include two diodes,
Three series circuits and the three phase sine voltage source of three-phase voltage source circuit 1 are separately connected, and access point is located at every series circuit
Two diodes between；
Three-phase active power factor corrects topological circuit, and input terminal connects the both ends in parallel of three-phase uncontrollable rectifier circuit；With
And
Active triple harmonic current injection circuit, including thyristor and RCD circuits, input terminal i.e. three series circuit with
The access point that the three phase sine voltage source of three-phase voltage source circuit 1 is separately connected.
Further, one of them two pole of two diodes on every series circuit of the three-phase uncontrollable rectifier circuit
The anode of pipe is connected with the cathode of another diode, and three series circuit cathodes are connected with cathode, anode and anode phase
Even.
Further, the three-phase active power factor correction topological circuit is two symmetrical buck circuits.
Advantageous effect：Compared with three-phase LC in the prior art filters Passive Power factor correction circuit, power factor (PF) can
Reach 1.0, and output voltage is controllable；Compared with three-phase boost-buck type PFC rectification circuits, in the case of no booster circuit
Export low voltage；Compared with triphase single-switch correcting circuit, current control is simple, and inductive current works in continuous mode, defeated
It is small to enter output current ripple, only needs two inductance, is not required to realize that three-phase decoupling, control are simple；With three-phase Multi- Switch power factor (PF)
Correcting circuit is compared, and driving and control strategy are simple, cost-effective, are easy to implement.
Description of the drawings
Fig. 1 is the electrical block diagram of the present invention；
Fig. 2 is the control loop schematic diagram of the present invention；
Fig. 3 is the three-phase current simulated effect figure of the present invention；
Fig. 4 is the circuit working state under working condition 1 of the present invention i.e. A phases and C phases circulation status (Q1, Q2 are connected)
Figure；
Fig. 5 is the circuit work shape under working condition 2 of the present invention i.e. A phases and B phases circulation status (Q1 conductings, Q2 shutdowns)
State figure；
Fig. 6 is the circuit work shape under working condition 3 of the present invention i.e. B phases and C phases circulation status (Q1 shutdowns, Q2 conductings)
State figure；
Fig. 7 is the circuit working state figure under working condition 4 of the present invention i.e. freewheeling state (Q1, Q2 are turned off)；
Fig. 8 is circuit working state figure of the present invention when working condition switches.
Specific implementation mode
1~8 couple of present invention elaborates below in conjunction with the accompanying drawings, an attached drawing in the present invention or a kind of embodiment
Described in elements and features can mutually be tied with elements and features shown in one or more other attached drawings or embodiment
It closes.It should be noted that for purposes of clarity, unrelated to the invention, ordinary skill people is omitted in attached drawing and explanation
The expression and description of component and processing known to member.
A kind of voltage-dropping type PFC rectification circuits, including
Three-phase voltage source circuit 1 is in 120 ° of three sinusoidal voltage sources by a, b, c tri- and formed, a, b, c three-phase electricity
One end of potential source connects together；
Three-phase uncontrollable rectifier circuit 2, including three series circuits in parallel, every series circuit include two diodes,
Three series circuits and the three phase sine voltage source of three-phase voltage source circuit 1 are separately connected, and access point is located at every series circuit
Two diodes between；
Three-phase active power factor corrects topological circuit 3, and input terminal connects the both ends in parallel of three-phase uncontrollable rectifier circuit 2；
Active triple harmonic current injection circuit 4, including thyristor and RCD circuits, input terminal i.e. three series circuit with
The access point that the three phase sine voltage source of three-phase voltage source circuit 1 is separately connected.
Refer to the attached drawing 1, three-phase voltage source circuit 1 are in 120 ° of three sinusoidal voltage sources by a, b, c tri- and formed, a,
B, c three-phase voltage sources one end connects together, and the other end is connected with three-phase uncontrollable rectifier circuit 2 respectively.
Three-phase uncontrollable rectifier circuit 2 includes diode D1, D2, D3, D4, D5 and D6, and the anode of D1 is connected with the cathode of D4
First series circuit is constituted, the anode of D2 is connected with the cathode of D5 constitutes Article 2 series circuit, the anode of D3 and the moon of D6
Extremely it is connected and constitutes Article 3 series circuit.Above three series circuit cathodes are connected with cathode, anode is connected with anode.
In the present embodiment, the D1 of the other end and first series circuit in a phase voltages source of three-phase voltage source circuit 1
Being a little connected between D4, the other end in b phase voltages source and being a little connected between the D2 of Article 2 series circuit and D5, c
Being a little connected between the other end in phase voltage source and the D3 of Article 3 series circuit and D6.
In other embodiments, due between three sinusoidal voltage sources of three-phase voltage source circuit 1 and three-phase do not control it is whole
It is equivalent between three series circuits of current circuit, so, the other end in a phase voltages source of three-phase voltage source circuit 1 also may be used
Being a little connected a little or between the D3 and D6 of Article 3 series circuit between the D2 of Article 2 series circuit and D5.
In the present embodiment, three-phase active power factor correction topological circuit 3 is preferably two symmetrical buck circuits,
One of buck circuits include diode D13, capacitance C1 power switch tubes Q1 and Q3, diode D13, inductance L1, capacitance
C1；Second buck circuit includes power switch tube Q2 and Q3, diode D13, inductance L2, capacitance C1.The collector of Q1 and three
The common cathode of phase uncontrollable rectifier circuit 2 is connected, and the emitter of Q1 is connected with the collector of the cathode of D13 and Q3, the emitter of Q3
It is connected with one end of inductance L1, the other end of inductance L1 is connected with capacitance C1 anodes, emitter and the three-phase uncontrollable rectifier of Q2
The common-anode of circuit 2 is connected, and the collector of Q2 is connected with one end of the anode of D13 and L2, the other end of L2 and the cathode phase of C1
Even.
In other embodiments, three-phase active power factor correction topological circuit 3 can be Boost, Buck-Boost,
Flyback, Sepic or Cuk circuit.
Active triple harmonic current injection circuit 4 includes thyristor Q4, Q5, Q6, Q7, Q8, Q9 and RCD circuit, RCD electricity
Road include resistance R1, R2, R3, R4, R5, R6, capacitance C2, C3, C4, C5, C6, C7, D7 and diode D8, D9, D10, D11,
D12.Wherein the anode of Q4 is connected with the midpoint of the cathode of C2 and first series circuit, the cathode of Q4, the cathode of D7 and R1
One end is connected with the cathode of D13, and the anode of Q5 is connected with the midpoint of the cathode of C3 and Article 2 series circuit, cathode, the D8 of Q5
Cathode be connected with the cathode of one end of R2 and D13, the midpoint phase of the anode of Q6 and the cathode of C4 and Article 3 series circuit
Even, the cathode of Q6, the cathode of D9 are connected with the cathode of one end of R3 and D13, and the anode of Q7 is connected with the cathode of C5 and first
The midpoint of circuit is connected, and the cathode of Q7, the cathode of D10 are connected with the anode of one end of R4 and D13, the anode of Q8 and the moon of C6
Pole is connected with the midpoint of Article 2 series circuit, and the cathode of Q8, the cathode of D11 are connected with the anode of one end of R5 and D13, Q9
Anode be connected with the midpoint of the cathode of C7 and Article 3 series circuit, the cathode of Q8, one end of the cathode of D12 and R6 and D13
Anode be connected.
In the present embodiment, power switch tube Q1、Q2、Q3For MOSFET element, Q4、Q5、Q6、 Q7、Q8、Q9It is thyristor.
In other embodiments, power switch tube Q1、Q2、Q3Can be IGBT.
Refer to the attached drawing 2, three-phase input use two symmetrical three-plase half wave rectifier circuits, and common cathode is to neutral point electricity
Pressure is three-phase input voltage positive half cycle envelope, and common-anode voltage to neutral is three-phase input voltage negative half period envelope；Control
The power tube current of two symmetrical buck circuits 2 of system follows input voltage positive half cycle and negative half period envelope respectively.
The modulation of active triple harmonic current injection circuit 4 is according to rectifier input voltage and the low frequency modulations of commutation,
Final three-phase phase current keeps phase completely the same with phase voltage, that is, realizes the purpose of PFC.
With reference to taking Fig. 3, a is three-phase input a phase voltages Ua and electric current ia, b are three-phase input b phase voltages Ub and electric current ib,
C is three-phase input c phase voltages Uc and electric current ic.It can be seen that three-phase current keeps same phase with three-phase phase voltage from a, b, c
Position, that is, realize that PFC, simulation result are shown, which can make power factor reach 1.0.
Operation principle：
New A C/DC converters are to introduce triple harmonic current to reduce input current ripple.Triple harmonic current
The modulation of injection is to carry out low frequency modulations according to input voltage.Triple harmonic current section in only can be injected into three
Any one phase in phase.According to conducting state of the reduction voltage circuit switching tube within a pulse period, circuit can be divided into four
A working condition.This four working conditions existOn off state table in section is as shown in table 1：
| Q1, Q2 conducting state | |
| Working condition 1 | Q1, Q2 are connected |
| Working condition 2 | Q1 conductings, Q2 shutdowns |
| Working condition 3 | Q1 shutdowns, Q2 conductings |
| Working condition 4 | Q1, Q2 are turned off |
1 each working condition on off state table of table
Section,ub Have in section just have it is negative, can will
It is divided into two sections, i.e. sectionThe section andIn sectionIt is interior, input
Voltage ub＜ 0；In sectionIt is interior, input voltage ub＞ 0.
Working condition 1：A phases and C phases circulation status (Q1, Q2 are connected).Its equivalent circuit is illustrated in fig. 4 shown below, and works as input
Phase voltage ub When in section, input source and buck inductor L this moment1And L2Together through D1, Q1, D6, Q3, Q2
Energy is provided to load；Otherwise as input phase voltage ub When in section, equally by input source and decompression
Inductance L1And L2Together energy is provided to load through D1, Q1, D6, Q3, Q2.
Working condition 2：A phases and B phases circulation status (Q1 conductings, Q2 shutdowns).Its equivalent circuit diagram is illustrated in fig. 5 shown below, when
Input phase voltage ub When in section, input source and buck inductor L this moment1And L2Together through D1, Q1, Q3, Q8
Energy is provided to load.
Working condition 3：B phases and C phases circulation status (Q1 shutdowns, Q2 conductings).Its equivalent circuit diagram is illustrated in fig. 6 shown below, when
Input phase voltage ub When in section, input source and buck inductor L this moment1And L2Together through Q5, Q3, Q2,
D6 provides energy to load.
Working condition 4：Freewheeling state (Q1, Q2 are turned off).Its equivalent circuit is illustrated in fig. 7 shown below, as input phase voltage ub When in section, buck inductor L this moment1And L2With constant current IDCTogether energy is provided to load through Q3, D13
Amount；Otherwise as input phase voltage ub When in section, equally by buck inductor L1And L2With constant current IDC
Together energy is provided to load through Q3, D13.
When the switching of above-mentioned working condition, there is the working condition such as Fig. 8 (Q3 shutdowns), Q3 shutdowns are for brilliant lock
Pipe stops to realize its cut-off.
The above is only that the preferred embodiment of patent of the present invention is described, not to patent of the present invention
Range is defined, and under the premise of not departing from Patent design spirit of the present invention, those of ordinary skill in the art are special to the present invention
The various modifications and improvement that the technical solution of profit is made should all fall into the protection domain that patent claims of the present invention determine
It is interior.
Claims (6)
1. a kind of voltage-dropping type PFC rectification circuits, it is characterised in that including：
Three-phase voltage source circuit is in 120 ° of three sinusoidal voltage sources by three and forms, and one end of three sinusoidal voltage sources connects
Together；
Three-phase uncontrollable rectifier circuit, including three series circuits in parallel, every series circuit include two diodes, three strings
Connection circuit and the three phase sine voltage source of three-phase voltage source circuit are separately connected, and access point is located at two two of every series circuit
Between pole pipe；
Three-phase active power factor corrects topological circuit, and input terminal connects the both ends in parallel of three-phase uncontrollable rectifier circuit；And
Active triple harmonic current injection circuit, including thyristor and RCD circuits, input terminal i.e. three series circuit and three-phase electricity
The access point that the three phase sine voltage source of source circuit is separately connected.
2. voltage-dropping type PFC rectification circuits according to claim 1, it is characterised in that：The three-phase uncontrollable rectifier circuit is every
The anode of two one of diodes of diode on series circuit is connected with the cathode of another diode, described three
Series circuit cathode is connected with cathode, anode is connected with anode.
3. voltage-dropping type PFC rectification circuits according to claim 1, it is characterised in that：The three-phase active power factor school
Positive topological circuit is two symmetrical buck circuits.
4. voltage-dropping type PFC rectification circuits according to claim 3, it is characterised in that：The buck circuits include diode
D13, capacitance C1 power switch tubes Q1 and Q3, diode D13, inductance L1, capacitance C1；Second buck circuit includes power switch
Pipe Q2 and Q3, diode D13, inductance L2, capacitance C1；The collector of Q1 is connected with the common cathode of three-phase uncontrollable rectifier circuit 2, Q1
Emitter be connected with the collector of the cathode of D13 and Q3, the emitter of Q3 is connected with one end of inductance L1, and inductance L1's is another
End is connected with capacitance C1 anodes, and the emitter of Q2 is connected with the common-anode of three-phase uncontrollable rectifier circuit 2, the collector and D13 of Q2
Anode be connected with one end of L2, the other end of L2 is connected with the cathode of C1.
5. voltage-dropping type PFC rectification circuits according to claim 1, it is characterised in that：The active triple harmonic current note
It includes thyristor Q4, Q5, Q6, Q7, Q8, Q9 and RCD circuit to enter circuit, the RCD circuits include resistance R1, R2, R3, R4, R5,
R6, capacitance C2, C3, C4, C5, C6, C7, D7 and diode D8, D9, D10, D11, D12；The wherein cathode of the anode of Q4 and C2
It is connected with the midpoint of first series circuit, the cathode of Q4, the cathode of D7 are connected with the cathode of one end of R1 and D13, the sun of Q5
Pole is connected with the midpoint of the cathode of C3 and Article 2 series circuit, the cathode of Q5, one end of the cathode of D8 and R2 and D13 cathode
Be connected, the anode of Q6 is connected with the midpoint of the cathode of C4 and Article 3 series circuit, the cathode of Q6, the cathode of D9 and R3 one end
It is connected with the cathode of D13, the anode of Q7 is connected with the midpoint of the cathode of C5 and first series circuit, the cathode of Q7, the moon of D10
Pole is connected with the anode of one end of R4 and D13, and the anode of Q8 is connected with the midpoint of the cathode of C6 and Article 2 series circuit, Q8's
Cathode, the cathode of D11 are connected with the anode of one end of R5 and D13, the anode of Q9 and the cathode of C7 and Article 3 series circuit
Midpoint is connected, and the cathode of Q8, the cathode of D12 are connected with the anode of one end of R6 and D13.
6. voltage-dropping type PFC rectification circuits according to claim 1, it is characterised in that：The power switch tube Q1、Q2、Q3For
MOSFET or IGBT, Q4、Q5、Q6、Q7、Q8、Q9For thyristor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810590608.2A CN108462384B (en) | 2018-06-09 | 2018-06-09 | Three-phase buck PFC rectification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810590608.2A CN108462384B (en) | 2018-06-09 | 2018-06-09 | Three-phase buck PFC rectification circuit |
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| Publication Number | Publication Date |
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| CN108462384A true CN108462384A (en) | 2018-08-28 |
| CN108462384B CN108462384B (en) | 2024-05-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471252A (en) * | 2016-01-05 | 2016-04-06 | 福州大学 | Harmonic-current injection type three-phase power factor correction circuit with high voltage-reduction transformation ratio |
| CN105553249A (en) * | 2016-01-05 | 2016-05-04 | 福州大学 | Current injection type three-phase power factor correction circuit having wide voltage range and low voltage stress |
| CN107888096A (en) * | 2017-12-25 | 2018-04-06 | 三峡大学 | A kind of bridge arm tri-level mixed-rectification device of three-phase two |
| CN108011513A (en) * | 2018-01-08 | 2018-05-08 | 湖南工业大学 | High-voltage high-speed generator step-down rectifier PFC system based on SWISS rectifiers |
| CN208337407U (en) * | 2018-06-09 | 2019-01-04 | 南昌航空大学 | A kind of three-phase step-down type PFC rectification circuit |
-
2018
- 2018-06-09 CN CN201810590608.2A patent/CN108462384B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471252A (en) * | 2016-01-05 | 2016-04-06 | 福州大学 | Harmonic-current injection type three-phase power factor correction circuit with high voltage-reduction transformation ratio |
| CN105553249A (en) * | 2016-01-05 | 2016-05-04 | 福州大学 | Current injection type three-phase power factor correction circuit having wide voltage range and low voltage stress |
| CN107888096A (en) * | 2017-12-25 | 2018-04-06 | 三峡大学 | A kind of bridge arm tri-level mixed-rectification device of three-phase two |
| CN108011513A (en) * | 2018-01-08 | 2018-05-08 | 湖南工业大学 | High-voltage high-speed generator step-down rectifier PFC system based on SWISS rectifiers |
| CN208337407U (en) * | 2018-06-09 | 2019-01-04 | 南昌航空大学 | A kind of three-phase step-down type PFC rectification circuit |
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| CN108462384B (en) | 2024-05-24 |
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