CN105871244A - Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit - Google Patents

Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit Download PDF

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Publication number
CN105871244A
CN105871244A CN201610296766.8A CN201610296766A CN105871244A CN 105871244 A CN105871244 A CN 105871244A CN 201610296766 A CN201610296766 A CN 201610296766A CN 105871244 A CN105871244 A CN 105871244A
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China
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module
circuit
brachium pontis
double
pfc converter
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钟小芬
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Titanium Platinum Technology (shenzhen) Co Ltd
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Titanium Platinum Technology (shenzhen) Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • H02M7/797Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with 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
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies 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)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a single-phase or three-phase AC-DC/DC-AC dual-purpose circuit. The circuit comprises a PFC converter module, an intermediate stage protection module, a non-isolated pressure-boosting/lowering module and an input/output protection module which are in sequential series connection; the PFC converter module comprises one or more first bridge arms, a second bridge arm, a filter capacitor and one or more energy-storage inductor; the first bridge arms, the second bridge arm and the filter capacitor are in parallel connection; each first bridge arm comprises two main switch tubes which are in series connection in the same direction, and the second bridge arm comprises two rectification tubes which are in series connection in the same direction; one end of the energy-storage inductor is connected with a series connection node of the two main switch tubes, the other end of the energy-storage inductor serves as a first alternating current port, and a series connection node of the two rectification tubes serves as a second alternating current port; two external connection ports of the input/output protection module serve as two direct current ports respectively. According to the circuit, a small number of elements are used, cost is low, conversion efficiency is high, power intensity is high, and the circuit is particularly applicable to the situation that the output voltage is wide in adjustment range.

Description

A kind of single-phase AC-DC/DC-AC double-purpose circuit and three-phase AC-DC/DC-AC double-purpose circuit
Technical field
The present invention relates to rectifier and inverter field, particularly relate to a kind of single-phase or three-phase AC-DC/ DC-AC double-purpose circuit.
Background technology
The lifting of conversion efficiency and power density is the significant challenge of Power Electronic Technique.Promoting conversion efficiency can To reduce loss, reduce the difficulty of heat management, higher power density may finally be realized.Turn to promote Change efficiency, it is necessary to constantly break through in terms of electric power electric device, topological sum control.
Traditional AC-DC technical scheme, uses the pfc converter of traditional band rectifier bridge and isolation DC-DC converter.The loss of rectifier bridge is very big, particularly at low pressure full load;Because the damage of rectifier bridge Consumption, the efficiency of whole converter is decreased obviously, and the temperature rise of rectifier bridge and thermal stress are important setting Meter challenge.Isolated DC-DC converter, is mainly adjusted to other stable DC by the output of PFC Output, however it is necessary that employing isolating transformer.So, traditional AC-DC technical scheme major defect is Efficiency is on the low side, particularly the loss of input rectifying bridge, when low-voltage input, fully loaded output, accounts for overall damage Consumption is very big, and temperature rise and thermal stress become a significant challenge.It addition, the program is whole only as AC-DC Stream device, and cannot act as DC-AC inverter.
Summary of the invention
Present invention aim at providing a kind of single-phase or three-phase AC-DC/DC-AC double-purpose circuit, it is intended to solve Traditional AC-DC technical scheme efficiency is on the low side, overall loss big, and cannot function as DC-AC inverter Problem.
The invention provides a kind of single-phase AC-DC/DC-AC double-purpose circuit, including be sequentially connected in series Pfc converter module, intergrade protection module, non-isolated step-up/down module and input and output protection mould Block;
Described pfc converter module includes at least one first brachium pontis, the second brachium pontis, a filtered electrical Hold and at least one energy storage inductor;Described first brachium pontis, the second brachium pontis and filter capacitor are connected in parallel;Institute State the first brachium pontis and include that the main switch of two series aiding connections, described second brachium pontis include two series aiding connections Rectifying tube;Described energy storage inductor one end is connected with the series connection node of two described main switches, other end conduct First AC port, the series connection node of two described rectifying tubes is as described second AC port;
Described non-isolated step-up/down module includes being depressured Buck circuit and/or boosting Boost circuit;
Two external-connected ports of described input and output protection module are respectively as two DC port;
Wherein, the afterflow device in described non-isolated step-up/down module and described pfc converter module Main switch is broad stopband power switch.
Preferably, described broad stopband power switch is GaN Transistor or SiC MOSFET.
Preferably, described pfc converter module is operated in CCM pattern, DCM pattern and BCM pattern In one or more of which pattern under.
During preferably as AC-DC circuit, described double-purpose circuit also includes lightning strike protection module, its bag Include the first power diode and the second power diode, the anode of described first power diode and described second The negative electrode of power diode connects described energy-storage reactor one end, and the negative electrode of described first power diode connects described One end of first brachium pontis, the anode of described second power diode connects the other end of described first brachium pontis.
Preferably, described pfc converter module includes two described first brachium pontis and two energy storage inductors, Two described first brachium pontis are in parallel, in two described energy storage inductor one end first brachium pontis described with two respectively Main switch series connection node connects, and two described energy storage inductor other ends also connect as described first AC port.
Preferably, described intergrade protection module includes at least one gate-controlled switch, and described gate-controlled switch connects Between described pfc converter module and described non-isolated step-up/down module;Described input and output protection mould Block includes that at least one switch element, described switch element are connected to described non-isolated step-up/down module and just Between the DC port of pole.
During preferably as DC-AC circuit, described double-purpose circuit also includes output capacitance, described output Electric capacity is connected between described first AC port and the second AC port.
Present invention also offers a kind of three-phase AC-DC/DC-AC double-purpose circuit, including be sequentially connected in series Pfc converter module, intergrade protection module, non-isolated step-up/down module and input and output protection mould Block;
Described pfc converter module includes three the first brachium pontis, three energy storage inductors and filter capacitor;Described First brachium pontis and described filter capacitor are connected in parallel;Each described first brachium pontis includes the master of two series aiding connections Switching tube, each described energy storage inductor one end is connected with the series connection node of two described main switches, the other end As AC port;
Described non-isolated step-up/down module includes being depressured Buck circuit and/or boosting Boost circuit;
Two external-connected ports of described input and output protection module are respectively as two DC port;
Wherein, the afterflow device in described non-isolated step-up/down module and described pfc converter module Main switch is broad stopband power switch.
Preferably, described broad stopband power switch is GaN Transistor or SiC MOSFET;Described PFC Converter module is operated in the one or more of which mould in CCM pattern, DCM pattern and BCM pattern Under formula.
During preferably as AC-DC circuit, described double-purpose circuit also includes three lightning strike protection modules, Each described lightning strike protection module includes the first power diode and the second power diode, described first power The anode of diode meets corresponding described energy-storage reactor one end, institute with the negative electrode of described second power diode The negative electrode stating the first power diode connects one end of the most described first brachium pontis, described second power diode Anode connect the other end of described first brachium pontis.
Main advantages of the present invention are that component number is few, low cost, conversion efficiency high, power density is high; Need not the application of electrical isolation, such as family expenses especially for output voltage adjustable range width and input and output Large Copacity energy-storage battery is charged by micro-capacitance sensor, great power LED power supply drives illumination etc. to LED strip, above-mentioned Advantage becomes apparent from.Meanwhile, because broad stopband power switch replaces conventional bridge rectification and non-isolated DC-DC converts, and AC-DC rectifier can realize DC-AC inverter;If AC and electrical network connect, Output and high-voltage large-capacity battery pack connect;Under AC-DC rectifier pattern, load can be provided by electrical network Direct current;Under DC-AC inverter pattern, electrical network can be fed, finally realize the two-way flow of energy, Play the effect of peak load shifting.
Accompanying drawing explanation
Fig. 1 is the topology diagram of single-phase AC-DC circuit in the embodiment of the present invention one;
Fig. 2 is the topology diagram of single-phase DC-AC circuit in the embodiment of the present invention two;
Fig. 3 is the topology diagram of single-phase AC-DC circuit in the embodiment of the present invention three;
Fig. 4 is the topology diagram of single-phase AC-DC circuit in the embodiment of the present invention four;
Fig. 5 is the topology diagram of single-phase AC-DC circuit in the embodiment of the present invention five;
Fig. 6 is the topology diagram of single-phase AC-DC circuit in the embodiment of the present invention six;
Fig. 7 is the topology diagram of three-phase AC-DC circuit in the embodiment of the present invention seven.
Detailed description of the invention
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, with Lower combination drawings and Examples, are further elaborated to the present invention.Should be appreciated that described herein Specific embodiment only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one:
Referring to Fig. 1, in present pre-ferred embodiments, single-phase AC-DC/DC-AC double-purpose circuit includes successively The pfc converter module 11, the intergrade that are connected in series protect module 12, non-isolated step-up/down module 13 And input and output protection module 14.
Described pfc converter module 11 includes 112, second brachium pontis of first brachium pontis 114, A filter capacitor C1 and energy storage inductor L1;Described first brachium pontis the 112, second brachium pontis 114 and filtering Electric capacity C1 is connected in parallel;Described first brachium pontis 112 includes main switch Q1 and Q2 of two series aiding connections, Described second brachium pontis 114 includes rectifying tube Q3 and Q4 of two series aiding connections;Described energy storage inductor L1 mono- End is connected with the series connection node of two described main switch Q1 and Q2, and the other end is as the first AC port 113, the series connection node of two described rectifying tube Q3 and Q4 is as described second AC port 115;Described Non-isolated step-up/down module 13 includes being depressured Buck circuit and/or boosting Boost circuit etc.;Described input Two external-connected ports of output protection module 14 are respectively as two DC port V+ and V-;Wherein, institute State the afterflow device in non-isolated step-up/down module 13 and the main switch of described pfc converter module 11 Pipe is broad stopband power switch.
During as AC-DC circuit, double-purpose circuit also includes lightning strike protection module 15, lightning strike protection module 15 Including the first power diode D1 and the second power diode D2, the sun of described first power diode D1 Pole connects described energy-storage reactor L1 one end, described first power with the negative electrode of described second power diode D2 The negative electrode of diode D1 connects one end of described first brachium pontis 112, the anode of described second power diode D2 Connect the other end of described first brachium pontis 112.So, except traditional EMC wave filter, Part I is Lightning strike protector, is made up of two power diodes.Out of phase, different amplitude lightning test in, Pulse energy is directly absorbed and clamper by bulky capacitor C1 by power diode D1 or D2.
Pfc converter module 11 is modified totem non-bridge PFC converter, uses an energy storage inductor Device, it is possible to achieve the highest power density, pfc converter module 11 is operated in CCM (Continuous Conduction Mode, continuous conduction mode) pattern, DCM (Discontinuous Conduction Mode, Discontinuous conduction mode) pattern and BCM (Boundary Continuous Mode, critical continuous conduction mode) mould Under one or more of which pattern in formula.Similar with tradition totem pfc converter, the first brachium pontis 112 Main switch Q2 and Q1 within the positive half-wave cycle and negative half wave cycles of power frequency, respectively as Boost become The main switch of parallel operation, first in energy storage inductor L1 energy storage, is then discharged into filter capacitor C1 by energy.? In the switch periods that filter capacitor C1 is discharged by energy storage inductor L1, main switch Q1 and Q2 must be at height High frequency switching between pressure and low pressure.For main switch Q1 and Q2, conventional Si technique MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide half field effect transistor) is because of it Body diode reverse recovers slow, and junction capacity is big, and switching loss is very big, therefore cannot meet requirement, it is necessary to Use broad stopband power switch, such as GaN Transistor (nitride crystal pipe) switching device or SiC MOSFET (carborundum metal-oxide half field effect transistor).Here GaN Transistor switching device, both Tandem type can be used, it would however also be possible to employ enhancement mode.Because the power frequency that its operating frequency is input AC, The rectifying tube Q3 and body diode D3 thereof of the second brachium pontis 114 and rectifying tube Q4 and body diode D4 thereof can To use traditional Si technique MOSFET, replacing traditional commutation diode, therefore efficiency promotes further.
Non-isolated step-up/down module 13 is non-isolated converter, says here as a example by step-down Buck converter Bright.Switching tube Q5 is main switch, and afterflow device Q6 and body diode D6 thereof is continued flow tube, inductor L2 and capacitor C2 is output filter.If conversion efficiency is less demanding, continued flow tube can directly use Power diode.High voltage output is applied, because afterflow device Q6 high-frequency work is between high-low voltage, Traditional Si technique MOSFET is poor because of body diode reverse recovery characteristics, and the shortcomings such as junction capacity is big must Broad stopband power switch must be used, such as GaN Transistor switching device or SiC MOSFET, or its It is similar to power switch pipe.AC for 220V inputs, the output voltage one of pfc converter module 11 As be that the input of 400Vdc can be converted to another one less than 400Vdc by 400Vdc, Buck converter DC output.Relative to isolation DC-DC converter, non-isolated converter have component number few, become This is low, conversion efficiency is high, power density advantages of higher.For output voltage adjustable range width and input and output Need not the application of electrical isolation, such as family expenses micro-capacitance sensor Large Copacity energy-storage battery is charged, and LED drives Dynamic power supply drives illumination etc. to high-voltage LED string, has explicit costs advantage and competitiveness.
Protection circuit includes that intergrade protection and output stage are protected.Two class protection mainly considers in abnormal conditions Under, pfc converter module 11 and non-isolated step-up/down module 13 are cut off, it is also possible to by non-isolated liter Pressure/voltage reduction module 13 and load break.Such as in the case of main switch Q5 short circuit, cut off centre in time Level protection, can protect pfc converter;Cut-out output stage is protected, and does not haves output over-voltage or the most electric Stream, carries out active effective protection to human body and load device.
In one embodiment, with reference to Fig. 1, intergrade protection module 12 includes at least one gate-controlled switch, Gate-controlled switch is connected between described pfc converter module 11 and described non-isolated step-up/down module 13; Described input and output protection module 14 includes that at least one switch element, described switch element are connected to described non- Between isolation boosting/voltage reduction module 13 and positive DC port.Preferably, intergrade protection module 12 includes One metal-oxide-semiconductor, the drain electrode of MOS and source electrode are connected and described with described pfc converter module 11 respectively Non-isolated step-up/down module 13 connects;Described input and output protection module 14 includes a fuse, protects Danger silk is connected between described non-isolated step-up/down module 13 and positive DC port.In other embodiments In, S1 to S4 can use any components and parts disconnected, include but not limited to MOSFET, relay, Fuse etc..S2 in order to simplify circuit, in intergrade protection module 12 and input and output protection module 14 With S4 direct short-circuit, S1 uses MOSFET, S3 to use fuse.When normally working, S1 turns on, The current stress of fuse is less than its rated value, normal circuit operation.If there is output short-circuit, fuse Because overcurrent action and fusing, so it is disconnected output loading, non-isolated converter and PFC can be protected Converter.If afterflow device Q6 is short-circuit, then S1 disconnects, and cuts off pfc converter and non-isolated converter.
Embodiment two:
The another one advantage of the technical program is that energy can be with two-way flow, can be as DC-AC inversion Device use, refer to Fig. 2, non-isolated step-up/down module 13 here as a example by Boost converter, Boost, by the input voltage of such as 200Vdc to 400Vdc, is boosted as another one 420Vdc High voltage.Pfc converter module 11 (now as inverter) can use SPWM (Sinusoidal Pulse Width Modulation, sinusoidal pulse width modulation) control mode, Boost exported is straight Stream electricity inversion is alternating current output.If the main switch Q1 short circuit of non-isolated step-up/down module 13, defeated Enter output protection module 14 input side and non-isolated step-up/down module 13 to be cut off in time.If PFC There is short circuit in the main switch Q3 to Q6 of converter module 11, intergrade protection module 12 can by non-every Disconnect from step-up/down module 13 and output loading, it is to avoid more hardware faults and damage.As DC-AC During circuit, described double-purpose circuit also includes that output capacitance C3, described output capacitance C3 are connected to described first Between AC port 113 and the second AC port 115.
Embodiment three:
Refer to Fig. 3, if non-isolated step-up/down module 13 uses Boost boost converter, then have Technical scheme shown in Fig. 3.For the occasion that efficiency requirements is the highest, continued flow tube Q6 can use rectification two Pole is managed, such as Ultrafast recovery commutation diode or SiC diode etc..If employing genotron, pass The MOSFET of the Si technique of system is because of its body diode reverse recovery characteristics difference and the shortcoming such as junction capacity is big, continuous Flow tube Q6 should use GaN Transistor switching device or SiC MOSFET.Protected level is a kind of simple Implementation, intergrade can be protected in module 12 protection switch S2 and input and output protection module The protection switch S4 short circuit of 14, protection switch S1 and S3 uses MOSFET, or relay, insurance Silk etc..In the case of short trouble occurs in main switch Q5, protection switch S1 disconnects, and cuts off PFC Converter module 11 and non-isolated step-up/down module 13, protect pfc converter module 11.At continued flow tube In the case of Q6 short circuit, protection switch S3 disconnects and can cut off load and non-isolated converter.
Embodiment four:
Refer to Fig. 4, if non-isolated step-up/down module 13 uses Buck-Boost buck-boost converter, Then there is the technical scheme shown in Fig. 4.The output of technical scheme shown in Fig. 4 can be higher than pfc converter module The output voltage of 11, it is also possible to less than its output voltage.But, switching tube Q5 and the electricity of continued flow tube Q6 Compression must be over the output voltage of twice, and in high voltage output application, device selects less, and becomes This is higher, therefore can all use broad stopband power switch.Pointing out, non-isolated step-up/down module 13 is removed simultaneously Outside above-mentioned common topology, it is also possible to use Cuk (Care Unite Skin, chopper circuit), Sepic Topologys such as (single ended primary inductor converter).
Embodiment five:
Referring to Fig. 5, pfc converter module 11 uses heterogeneous pfc converter can promote power output. Pfc converter module 11 includes the first brachium pontis 112 and two or more energy storage inductor described in two or more L1-L2, plural described first brachium pontis 112 is in parallel, plural described energy storage inductor L1-L2 One end is connected with the main switch series connection node in plural described first brachium pontis 112 respectively, two with On the described energy storage inductor L1-L2 other end and connect as described first AC port 113.
Fig. 5 is as a example by two-phase, and two-phase pfc converter can direct parallel operation, it is also possible to staggered work. If parallel operation, in the way of using phase place management, a phase can be turned off when underloading, to reduce loss, And raising efficiency.When two-phase parallel operation, electric current and the power of every phase not necessarily balance, and need additional flat Weighing apparatus control circuit.If inductor L1 and L2 is coupling on a magnetic core, even if driving not quite identical, Or there is on/off time delay in main switch Q1 to Q4, because the coupling of two windings, two-phase Electric current and power can also force balance.Rule of thumb, after inductor L1 and L2 coupling, electric current and merit The error of rate is within 20%.If two-phase pfc converter uses staggered working method, no matter drive signal Phase differential is how many, in addition to the phase place management lifting to light-load efficiency, it is also possible to reduce input and output electricity Flow liner ripple, reduces the volume of EMC wave filter, reduces the current stress of filter capacitor C1.
Embodiment six:
Referring to Fig. 6, same, the non-isolated converter in non-isolated step-up/down module 13 can also be adopted With multi-phase converter, Fig. 6 is as a example by two-phase Buck converter.Pfc converter heterogeneous with Fig. 5 is similar, Heterogeneous non-isolated converter has input and output Ripple Suppression function;Inductor L2 and L3 can be coupling in one Rise, it is achieved passive type electric current and power-balance;Managed by phase place, it is achieved the lifting of light-load efficiency.
Embodiment 7:
Referring to Fig. 7, in present pre-ferred embodiments, three-phase AC-DC/DC-AC double-purpose circuit includes successively The pfc converter module 11, the intergrade that are connected in series protect module 12, non-isolated step-up/down module 13 And input and output protection module 14;Described pfc converter module 11 include three the first brachium pontis 112, Three energy storage inductor L1~L3 and filter capacitor C1;Described first brachium pontis 112 and described filter capacitor C1 are also Connection connects;Each described first brachium pontis 112 include two series aiding connections main switch (respectively Q1 and Q2, Q3 and Q4, Q5 and Q6), each described energy storage inductor L1/L2/L3 one end respectively with described in two Main switch Q1 and Q2, Q3 and Q4, and the series connection node connection of Q5 and Q6, other end conduct AC port;Described non-isolated step-up/down module 13 includes being depressured Buck circuit and/or boosting Boost Circuit;Two external-connected ports of described input and output protection module 14 are respectively as two DC port V+/V-; Afterflow device in non-isolated step-up/down module 13 and the main switch of described pfc converter module 11 For broad stopband power switch.
Preferably, broad stopband power switch is GaN Transistor or SiC MOSFET;Described PFC becomes Parallel operation module 11 is operated in the one or more of which mould in CCM pattern, DCM pattern and BCM pattern Under formula.
During as AC-DC circuit, described double-purpose circuit also includes three lightning strike protection modules 15, with wherein As a example by one, lightning strike protection module 15 includes the first power diode D1 and the second power diode D2, The anode of described first power diode D1 connects corresponding described with the negative electrode of described second power diode D2 Energy-storage reactor L1 one end, the negative electrode of described first power diode D1 connects the most described first brachium pontis One end of 112, the anode of described second power diode D2 connects the other end of described first brachium pontis 112.
It addition, pfc converter module 11, intergrade protection module 12, non-isolated step-up/down module 13 And other embodiments of input and output protection module 14 are referred to embodiment two to six, the most superfluous State.
In technique scheme, have the advantages that,
1, totem pfc converter and non-isolated converter combination AC-DC topology:
Totem pfc converter main switch uses GaN Transistor device or SiC MOSFET, whole Flow tube uses high pressure Si technique MOSFET, it is achieved superelevation conversion efficiency.
Totem pfc converter uses single energy storage inductor, it is achieved ultra high power density.
Non-isolated converter replaces isolated converter, and component number is few, conversion efficiency is high, power density is high.
Non-isolated converter can be depressured, boosts, buck, application places variation.
2, non-isolated converter and totem pfc converter combination DC-AC topology:
Totem pfc converter and non-isolated converter all use switching tube rather than commutation diode, permissible Realize the energy in bidirectional flow mode of operation of AC-DC rectifier and DC-AC inverter.
DC-AC inverter, because non-isolated converter can be depressured, boosts, buck, has input voltage Wide advantage.
DC-AC inversion has that component number is few, conversion efficiency is high, power density advantages of higher.
3, intergrade protection and output stage protection circuit:
Under AC-DC rectifier mode of operation, if there being abnormal conditions to occur, intergrade protection can have Effect cuts off pfc converter and non-isolated converter;Load and whole converter can be cut off by output stage protection.
Under DC-AC inverter mode of operation, if there being abnormal conditions to occur, input stage protection can be by High input voltage and non-isolated converter cut off;Non-isolated converter and inverter can be cut off by intergrade protection.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention Protection domain within.

Claims (10)

1. a single-phase AC-DC/DC-AC double-purpose circuit, it is characterised in that include being sequentially connected in series Pfc converter module, intergrade protection module, non-isolated step-up/down module and input and output protection mould Block;
Described pfc converter module includes at least one first brachium pontis, the second brachium pontis, a filtered electrical Hold and at least one energy storage inductor;Described first brachium pontis, the second brachium pontis and filter capacitor are connected in parallel;Institute State the first brachium pontis and include that the main switch of two series aiding connections, described second brachium pontis include two series aiding connections Rectifying tube;Described energy storage inductor one end is connected with the series connection node of two described main switches, other end conduct First AC port, the series connection node of two described rectifying tubes is as described second AC port;
Described non-isolated step-up/down module includes being depressured Buck circuit and/or boosting Boost circuit;
Two external-connected ports of described input and output protection module are respectively as two DC port;
Wherein, the afterflow device in described non-isolated step-up/down module and described pfc converter module Main switch be broad stopband power switch.
2. double-purpose circuit as claimed in claim 1, it is characterised in that described broad stopband power switch is GaN Transistor or SiC MOSFET.
3. double-purpose circuit as claimed in claim 1 or 2, it is characterised in that described pfc converter module It is operated under the one or more of which pattern in CCM pattern, DCM pattern and BCM pattern.
4. double-purpose circuit as claimed in claim 1, it is characterised in that during as AC-DC circuit, institute Stating double-purpose circuit and also include lightning strike protection module, it includes the first power diode and the second power diode, The anode of described first power diode connects described energy-storage reactor one with the negative electrode of described second power diode End, the negative electrode of described first power diode connects one end of described first brachium pontis, described second power diode Anode connect the other end of described first brachium pontis.
5. the double-purpose circuit as described in claim 1 or 4, it is characterised in that described pfc converter module Including the first brachium pontis described in two or more and two or more energy storage inductor, plural described first brachium pontis Parallel connection, plural described energy storage inductor one end is opened with the master in plural described first brachium pontis respectively Closing pipe series connection node to connect, the plural described energy storage inductor other end also connects as described first exchange end Mouthful.
6. double-purpose circuit as claimed in claim 1, described intergrade protection module includes that at least one is controlled Switch, described gate-controlled switch series connection is in described pfc converter module and described non-isolated step-up/down module Between;Described input and output protection module includes that at least one switch element, described switch element are connected to institute State between non-isolated step-up/down module and positive DC port.
7. double-purpose circuit as claimed in claim 1, it is characterised in that during as DC-AC circuit, institute State double-purpose circuit and also include that output capacitance, described output capacitance are connected to described first AC port and second and hand over Between flow port.
8. a three-phase AC-DC/DC-AC double-purpose circuit, it is characterised in that include being sequentially connected in series Pfc converter module, intergrade protection module, non-isolated step-up/down module and input and output protection mould Block;
Described pfc converter module includes three the first brachium pontis, three energy storage inductors and filter capacitor;Described First brachium pontis and described filter capacitor are connected in parallel;Each described first brachium pontis includes the master of two series aiding connections Switching tube, each described energy storage inductor one end is connected with the series connection node of two described main switches, the other end As AC port;
Described non-isolated step-up/down module includes being depressured Buck circuit and/or boosting Boost circuit;
Two external-connected ports of described input and output protection module are respectively as two DC port;
Wherein, the afterflow device in described non-isolated step-up/down module and described pfc converter module Main switch be broad stopband power switch.
9. double-purpose circuit as claimed in claim 8, it is characterised in that described broad stopband power switch is GaN Transistor or SiC MOSFET;Described pfc converter module is operated in CCM pattern, DCM Under one or more of which pattern in pattern and BCM pattern.
10. double-purpose circuit as claimed in claim 8 or 9, it is characterised in that during as AC-DC circuit, Described double-purpose circuit also includes that three lightning strike protection modules, each described lightning strike protection module include the first power Diode and the second power diode, the anode of described first power diode and described second power diode Negative electrode connect corresponding described energy-storage reactor one end, the negative electrode of described first power diode meets corresponding institute Stating one end of the first brachium pontis, the anode of described second power diode connects the other end of described first brachium pontis.
CN201610296766.8A 2016-05-06 2016-05-06 Single-phase AC-DC/DC-AC dual-purpose circuit and three-phase AC-DC/DC-AC dual-purpose circuit Pending CN105871244A (en)

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CN112421944A (en) * 2020-11-04 2021-02-26 杭州富特科技股份有限公司 Power converter compatible with single-phase alternating current and three-phase alternating current and control method thereof
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CN114050716A (en) * 2021-11-17 2022-02-15 杨枫 Three-phase high-voltage charging module topological circuit
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