CN107947616A - Soft switch power amplifier - Google Patents

Soft switch power amplifier Download PDF

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Publication number
CN107947616A
CN107947616A CN201711288641.1A CN201711288641A CN107947616A CN 107947616 A CN107947616 A CN 107947616A CN 201711288641 A CN201711288641 A CN 201711288641A CN 107947616 A CN107947616 A CN 107947616A
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China
Prior art keywords
class
bridge arm
filter
filter capacitor
bridge
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Granted
Application number
CN201711288641.1A
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Chinese (zh)
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CN107947616B (en
Inventor
寇宝泉
韦坚
张海林
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Harbin Institute of Technology
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Harbin Institute of Technology
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    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac 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
    • H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
    • 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
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4815—Resonant converters
    • H02M7/4818—Resonant converters with means for adaptation of resonance frequency, e.g. by modification of capacitance or inductance of resonance circuits
    • 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)
  • Inverter Devices (AREA)
  • Amplifiers (AREA)

Abstract

The invention discloses soft switch power amplifier, belongs to drive and control of electric machine field.Soft switch power amplifier includes：DC power source unit, inversion circuit, resonant network and filter network；Resonant network is connected between the DC power source unit feeder ear and the output terminal of the inversion circuit；The inversion circuit is converted to exchange to the direct current that exports the DC power source unit and is delivered to load by the filter network.The present invention is operated in Sofe Switch state due to the semiconductor switch device of the power amplifier, there is current control accuracy height, dynamic response is fast, efficient, noise is low.

Description

Soft switch power amplifier
Technical field
The invention belongs to drive and control of electric machine field, more particularly to a kind of soft switch power amplifier.
Background technology
PWM (Pulse Width Modulation, pulse width modulation) hard switching power amplifiers are because its cost is low, control System is simple, is widely used in servo drive system.With the raising of actuator power grade, the characteristic of its hard switching is led Cause power amplifier switches loss big, fever seriously, reduces reliability and the service life of system, particularly in some high-accuracy fields Close, improve switching frequency and accelerate the response speed of system with this and increase current control accuracy to be necessary.Due to by The limitation of switching loss has been arrived, hard switching is difficult to realize the high frequency of driver, therefore in order to improve system effectiveness and switch frequency , there is soft switch power amplifier in rate.
Existing soft switch power amplifier circuit as shown in Figure 1, the circuit by increase passive lossless snubber come Realize soft switch technique, improve the switch situation of device for power switching using the resonant process of passive device itself, reduce switch The turn-off power loss of pipe, while the energy that passive lossless snubber stores during switching tube conducting is effectively shifted, it is real Show the Sofe Switch of two high frequency power switching devices, reduced switching loss, improve the dynamic response of system.
As a result of the mode of passive flexible switch, its shortcoming is mainly ZCS (Zero Current Switch, zero current Switch)/ZVS (Zero Voltage Switch, zero voltage switch) condition is related with the change of switching frequency, load etc., when opening Frequency (load) is closed when factor changes, it is impossible to ensure the operation of the resonance mode of circuit well；It is anti-in main circuit The voltage stress of parallel diode is big, and two low-frequency tubes are still in the state of hard switching.Particularly by the circuit application In precise flange occasion, two low-frequency tubes are switched in output current zero passage, can cause output current Zero-crossing Distortion, So improving the output current ripple after switching frequency still very greatly, it can not meet application requirement.
The content of the invention
The purpose of the present invention is to solve the above problem of existing soft switch power amplifier, now provides one kind and is intended to reality Existing bridge type topology circuit works in complete period bias current pattern, reduces output current ripple and voltage stress, and Sofe Switch can be realized in the case of full load (high current, low current), to meet in high-power or ultraprecise motion control field The soft switch power amplifier of demand under closing.
A kind of soft switch power amplifier, including：DC power source unit, inversion circuit, resonant network and filter network；
Resonant network is connected between the DC power source unit feeder ear and the output terminal of the inversion circuit；
The inversion circuit is converted to exchange by the filtering net to the direct current for exporting the DC power source unit Network is delivered to load.
Preferably, the inversion circuit includes at least one first kind half-bridge switch power cell, each first kind Half-bridge switch power cell includes the double pressure drop half-bridge inverters of the first kind being made of two bridge arms in parallel, when the first kind half When bridge switch power cell is multiple, it is connected in parallel between the first kind half-bridge switch power cell；
The bridge arm includes first kind bridge arm and the second class bridge arm, and the first kind bridge arm is in parallel with the second class bridge arm The double pressure drop half-bridge inverters of the first kind of bridge arm composition；
The positive terminal of the first kind bridge arm connects the positive terminal of the DC power source unit, and the first kind bridge arm is born The negative pole end of extreme connection DC power source unit；
The negative pole end of the second class bridge arm connects the positive terminal of the DC power source unit, and the second class bridge arm is just The negative pole end of extreme connection DC power source unit.
Above-mentioned technical characteristic can in any suitable manner be combined or substituted by equivalent technical characteristic, as long as can reach To the purpose of the present invention.
The beneficial effects of the present invention are soft switch power amplifier of the invention can realize that bridge type topology circuit works In complete period bias current pattern, output current ripple and voltage stress are reduced, and in full load (high current, small electricity Stream) in the case of can realize Sofe Switch, solve the shortcomings that existing soft switch power amplifier, with meet high-power or super Demand under precise flange occasion.The soft switch power amplifier is with current control accuracy is high, dynamic response is fast, efficiency High, the features such as noise is low, it is with a wide range of applications in fields such as motor high-grade drives, powers of alterating and direct current.
Brief description of the drawings
Fig. 1 is the circuit diagram of existing soft switch power amplifier；
Fig. 2 is a kind of circuit diagram of embodiment of the half-bridge parallel connection soft switch power amplifier of the present invention；
Fig. 3 is a kind of circuit diagram of embodiment of the half-bridge soft switch power amplifier of the present invention；
Fig. 4 is a kind of circuit diagram of embodiment of the full-bridge parallel connection soft switch power amplifier of the present invention；
Fig. 5 is a kind of circuit diagram of embodiment of the full-bridge soft-switching power amplifier of the present invention；
Fig. 6 is a kind of circuit diagram of embodiment of the three phase full bridge parallel connection soft switch power amplifier of the present invention；
Fig. 7 is a kind of circuit diagram of embodiment of the three phase full bridge soft switch power amplifier of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its His embodiment, belongs to the scope of protection of the invention.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, but not as limiting to the invention.
A kind of soft switch power amplifier, including：DC power source unit, inversion circuit, resonant network and filter network；
Resonant network is connected between DC power source unit feeder ear and the output terminal of inversion circuit；
Inversion circuit is converted to exchange to the direct current that exports DC power source unit and is delivered to load by filter network.
In the present embodiment, soft switch power amplifier can realize that bridge type topology circuit works in complete period bias current Pattern, reduces output current ripple and voltage stress, and can be realized in the case of full load (high current, low current) Sofe Switch, solves the shortcomings that existing soft switch power amplifier, to meet in high-power or ultraprecise motion control occasion Under demand.The soft switch power amplifier has the characteristics that current control accuracy is high, dynamic response is fast, efficient, noise is low, It is with a wide range of applications in fields such as motor high-grade drives, powers of alterating and direct current.
In a preferred embodiment, inversion circuit includes at least one first kind half-bridge switch power cell, and each first Class half-bridge switch power cell includes the double pressure drop half-bridge inverters of the first kind being made of two bridge arms in parallel, when first kind half-bridge When switch power unit is multiple, it is connected in parallel between first kind half-bridge switch power cell；
Bridge arm includes first kind bridge arm and the second class bridge arm, and the of first kind bridge arm bridge arm composition in parallel with the second class bridge arm A kind of double pressure drop half-bridge inverters；
The positive terminal of the positive terminal connection DC power source unit of first kind bridge arm, the negative pole end connection direct current of first kind bridge arm The negative pole end of power supply unit；
The positive terminal of the negative pole end connection DC power source unit of second class bridge arm, the positive terminal connection direct current of the second class bridge arm The negative pole end of power supply unit.
In the present embodiment, DC power source unit includes positive direct-current power supply and negative DC power supply.
When inversion circuit includes a double pressure drop half-bridge inverter, soft switch power amplifier is half-bridge soft switch power Amplifier, as shown in figure 3, semi-bridge inversion circuit is by device for power switching S1,S2, diode D1,D2With resonant capacitance Cs1,Cs2Group Into device for power switching S1Negative pole end and diode D1Cathode terminal connect to form a bridge arm, device for power switching S2Just Extreme and diode D2Anode tap connect to form another bridge arm, form a half-bridges by two bridge arms are in parallel；Resonant capacitance Cs1,Cs2Respectively in order with corresponding device for power switching S1,S2, it is in parallel.
When inversion circuit includes multiple double pressure drop half-bridge inverters in parallel, soft switch power amplifier is half-bridge parallel connection Soft switch power amplifier, as shown in Fig. 2, half-bridge parallel inverter circuit is by device for power switching S1,S2,……,S2i-1, S2i,……,S2N-1,S2N, diode D1,D2,……,D2i-1,D2i,……,D2N-1,D2NWith resonant capacitance Cs1,Cs2,……, Cs2i-1,Cs2i,……,Cs2N-1,Cs2NComposition.Device for power switching S1Negative pole end and diode D1Cathode terminal connect to form one A bridge arm, device for power switching S2Positive terminal and diode D2Anode tap connect to form another bridge arm, by two bridge arms simultaneously Connection forms a half-bridge；Device for power switching S2N-1Negative pole end and diode D2N-1Cathode terminal connect to form a shunting bridge Arm, device for power switching S2NPositive terminal and diode D2NAnode tap connect to be formed another shunting bridge arm, by two bridge arms Parallel connection forms another half-bridge, and two half-bridge parallel connections form the more half-bridge inverters of double down pressure under high current.Double down pressure is most The positive terminal of bridge inverter is connected to DC power anode end, and the negative pole end of the double down more half-bridge inverters of pressure is connected to DC power supply Negative pole end.Similarly, corresponding device for power switching device for power switching S2i-1Negative pole end and diode D2i-1Cathode terminal connection Form a shunting bridge arm, device for power switching S2iPositive terminal and diode D2iAnode tap connect to form another shunting Bridge arm, by two bridge arms another half-bridge of formation in parallel.Resonant capacitance Cs1,Cs2,……,Cs2NRespectively in order with corresponding work( Rate switching device S1,S2,……,S2NIt is in parallel.
Wherein, i=1,2,3 ... ..., N, N are positive integer, S2i-1Represent the 2i-1 device for power switching, S2iRepresent the 2i device for power switching, D2i-1Represent the 2i-1 diode, D2iRepresent the 2i diode, Cs2i-1Represent that 2i-1 is a humorous Shake capacitance, Cs2iRepresent the 2i resonant capacitance.Resonant capacitance Cs1,Cs2,……,Cs2N-1,Cs2NIt can be external capacitor, also may be used To be device for power switching S respectively1,S2,……,,S2N-1,S2NInternal parasitic capacitance.
In the above-described embodiments, first kind bridge arm is by the 2i-1 device for power switching S and corresponding 2i-1 two The bridge arm of pole pipe D compositions, the bridge that the second bridge arm is made of the 2i device for power switching S and corresponding the 2i diode D Arm.
In a preferred embodiment, resonant network is included by the first derided capacitors Cd1, the second derided capacitors Cd2, the 3rd point Voltage capacitance Cd3The 2N resonant tank formed with 2N resonance modules, the number of resonance modules is identical with the number of bridge arm, wherein N For positive integer；
Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in DC power source unit both ends, Derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection DC power source unit Negative pole end；
Resonance modules include：First kind resonance modules and the second class resonance modules, first kind resonance modules and first kind bridge Arm corresponds to, and the second class resonance modules are corresponding with the second class bridge arm；
The input terminal of first kind resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, first The output terminal of class resonance modules is connected with the output terminal of first kind bridge arm, to form resonant tank all the way；
The input terminal of second class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, second The output terminal of class resonance modules is connected with the output terminal of the second class bridge arm, to form resonant tank all the way.
In the present embodiment, when inversion circuit includes a double pressure drop half-bridge inverter, soft switch power amplifier is Half-bridge soft switch power amplifier, as shown in figure 3, resonant network is by device for power switching S '1,S′2, diode D '1,D′2, it is humorous Shake inductance L '1,L′2, the first derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3Composition.Device for power switching S′1Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '1It is negative Extremely it is connected to resonant inductance L '1One end, resonant inductance L '1The other end be connected to diode D '1Anode tap, diode D′1Cathode terminal be connected to device for power switching S1Negative pole end；Device for power switching S '2Positive terminal be connected to power switch Device S2Positive terminal, device for power switching S '2Negative pole end be connected to resonant inductance L '2One end, resonant inductance L '2It is another One end is connected to diode D '2Anode tap, diode D '2Cathode terminal be connected to the second derided capacitors Cd2With the 3rd partial pressure electricity Hold Cd3Tie point on；Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in DC power supply list First both ends, derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection DC power supply The negative pole end of unit.
When inversion circuit includes multiple double pressure drop half-bridge inverters in parallel, soft switch power amplifier is half-bridge parallel connection Soft switch power amplifier, as shown in Fig. 2, resonant network is by device for power switching S '1,S′2,……,S′2i-1,S′2i,……, S′2N-1,S′2N, diode D '1,D′2,……,D′2i-1,D′2i,……,D′2N-1,D′2N, resonant inductance L '1,L′2,……, L′2i-1,L′2i,……,L′2N-1,L′2N, the first derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3Composition. Device for power switching S '1Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, power is opened Close device S '1Negative pole end be connected to resonant inductance L '1One end, resonant inductance L '1The other end be connected to diode D '1's Anode tap, diode D '1Cathode terminal be connected to device for power switching S1Negative pole end；Device for power switching S '2Positive terminal connect It is connected to device for power switching S2Positive terminal, device for power switching S '2Negative pole end be connected to resonant inductance L '2One end, resonance Inductance L '2The other end be connected to diode D '2Anode tap, diode D '2Cathode terminal be connected to the second derided capacitors Cd2With 3rd derided capacitors Cd3Tie point on；Device for power switching S '2N-1Positive terminal be connected to the first derided capacitors Cd1With second Derided capacitors Cd2Tie point on, device for power switching S '2N-1Negative pole end be connected to resonant inductance L '2N-1One end, resonance Inductance L '2N-1The other end be connected to diode D '2N-1Anode tap, diode D '2N-1Cathode terminal be connected to power switch device Part S2N-1Negative pole end；Device for power switching S '2NPositive terminal be connected to device for power switching S2NPositive terminal, power switch device Part S '2NNegative pole end be connected to resonant inductance L '2NOne end, resonant inductance L '2NThe other end be connected to diode D '2NSun Extremely, diode D '2NCathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on.Similarly, phase The device for power switching S ' answered2i-1Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, Device for power switching S '2i-1Negative pole end be connected to resonant inductance L '2i-1One end, resonant inductance L '2i-1The other end be connected to Diode D '2i-1Anode tap, diode D '2i-1Cathode terminal be connected to device for power switching S2i-1Negative pole end；Power switch Device S '2iPositive terminal be connected to device for power switching S2iPositive terminal, device for power switching S '2iNegative pole end be connected to it is humorous Shake inductance L '2iOne end, resonant inductance L '2iThe other end be connected to diode D '2iAnode tap, diode D '2iCathode terminal It is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on.Derided capacitors Cd1, the second derided capacitors Cd2With Three derided capacitors Cd3It is sequentially connected in series in DC power source unit both ends, derided capacitors Cd1One end connection DC power source unit just Extremely, derided capacitors Cd3One end connection DC power source unit negative pole end.
In the present embodiment, first kind resonance modules are by the 2i-1 device for power switching S ', corresponding 2i-1 a two The resonance modules of pole pipe D ' and corresponding the 2i-1 resonant inductance L ' compositions；Second class resonance modules are by the 2i power switch The resonance modules of device S ', corresponding 2i diode D ' and corresponding the 2i resonant inductance L ' compositions.
In a preferred embodiment, filter network is included by the first filter capacitor Cf1, the second filter capacitor Cf2With 2N filter 2N filter circuit of ripple module composition, the number of filter module is identical with the number of bridge arm, and wherein N is positive integer；
First filter capacitor Cf1With the second filter capacitor Cf2It is series at DC power source unit both ends, the first filter capacitor Cf1 One end connection DC power source unit positive terminal, the second filter capacitor Cf2One end connection DC power source unit negative pole end, One end of load is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between, the other end ground connection of load；
Filter module includes：First kind filter module and the second class filter module, first kind filter module and first kind bridge Arm corresponds to, and the second class filter module is corresponding with the second class bridge arm；
The output terminal of the input terminal connection first kind bridge arm of first kind filter module, the output terminal of first kind filter module connect It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
The input terminal of second class filter module connects the output terminal of the second class bridge arm, and the output terminal of the second class filter module connects It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between.
In the present embodiment, filter module uses filter inductance L；First kind resonance modules use the 2i-1 filter inductance L, with corresponding with first kind bridge arm and first kind resonance modules；Second class resonance modules use the 2i filter inductance L, with Two class bridge arms and the second class resonance modules correspond to.
When inversion circuit includes a double pressure drop half-bridge inverter, soft switch power amplifier is half-bridge soft switch power Amplifier, as shown in figure 3, filter network is by filter inductance L1,L2, the first filter capacitor Cf1With the second filter capacitor Cf2Composition, Filter inductance L1One end be connected to device for power switching S1Negative pole end, filter inductance L1The other end be connected to the first filtering Capacitance Cf1With the second filter capacitor Cf2Between, filter inductance L2One end be connected to device for power switching S2Positive terminal, filtering Inductance L2The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；First filter capacitor Cf1One end Connect the positive terminal of DC power source unit, the second filter capacitor Cf2One end connection DC power source unit negative pole end.
When inversion circuit includes multiple double pressure drop half-bridge inverters in parallel, soft switch power amplifier is half-bridge parallel connection Soft switch power amplifier, as shown in Fig. 2, filter network is by filter inductance L1,L2,……,L2i-1,L2i,……,L2N-1,L2N, First filter capacitor Cf1With the second filter capacitor Cf2Composition.Filter inductance L1One end be connected to device for power switching S1Anode End, filter inductance L1The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between, filter inductance L2One End is connected to device for power switching S2Positive terminal, filter inductance L2The other end be connected to the first filter capacitor Cf1With the second filter Ripple capacitance Cf2Between；Filter inductance L2N-1One end be connected to device for power switching S2N-1Negative pole end, filter inductance L2N-1It is another One end is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between, filter inductance L2NOne end be connected to power switch Device S2NPositive terminal, filter inductance L2NThe other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between.Together Reason, filter inductance L2i-1One end be connected to device for power switching S2i-1Negative pole end, filter inductance L2i-1The other end be connected to First filter capacitor Cf1With the second filter capacitor Cf2Between, filter inductance L2iOne end be connected to device for power switching S2iJust Extremely, filter inductance L2iThe other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between.First filter capacitor Cf1One end connection DC power source unit positive terminal, the second filter capacitor Cf2One end connection DC power source unit anode End.
In a preferred embodiment, inversion circuit further includes at least one second class half-bridge switch power cell, the second class The number of half-bridge switch power cell is identical with the number of first kind half-bridge switch power cell；Second class half-bridge switch power list Member is corresponded with first kind half-bridge switch power cell, and first kind half-bridge switch power cell is opened with corresponding second class half-bridge Close the double pressure drop full-bridge inverters of power cell formation in parallel；
Bridge arm further includes three classes bridge arm and the 4th class bridge arm, three classes bridge arm bridge arm composition in parallel with the 4th class bridge arm The double pressure drop half-bridge inverters of second class；
The positive terminal of the positive terminal connection DC power source unit of three classes bridge arm, the negative pole end connection direct current of three classes bridge arm The negative pole end of power supply unit；
The positive terminal of the negative pole end connection DC power source unit of 4th class bridge arm, the positive terminal connection direct current of the 4th class bridge arm The negative pole end of power supply unit.
In the present embodiment, when inversion circuit includes a full-bridge pair pressure drop full-bridge inverter, soft switch power amplification Device is full-bridge soft-switching power amplifier.As shown in figure 5, half-bridge parallel inverter circuit is by device for power switching S1,S2,S3,S4, Diode D1,D2,D3,D4With resonant capacitance Cs1,Cs2,Cs3,Cs4Composition.Device for power switching S1Negative pole end and diode D1's Cathode terminal connects to form a bridge arm, device for power switching S2Positive terminal and diode D2Anode tap connect to form another Bridge arm, by two bridge arms, one half-bridge of formation in parallel；Device for power switching S3Negative pole end and diode D3Cathode terminal connection shape Into a bridge arm, device for power switching S4Positive terminal and diode D4Anode tap connect to form another bridge arm, by two bridges Arm is in parallel to form a half-bridge, and two half-bridges are in parallel to form double down pressure full-bridge inverter；Resonant capacitance Cs1,Cs2,Cs3,Cs4Point Not in order with corresponding device for power switching S1,S2,S3,S4It is in parallel.
When inversion circuit includes multiple full-bridges in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is full-bridge Soft switch power amplifier in parallel.As shown in figure 4, full-bridge parallel inverter circuit is by device for power switching S1,S2,S3,S4,……, S4i-3,S4i-2,S4i-1,S4i,……,S4N-3,S4N-2,S4N-1,S4N, diode D1,D2,D3,D4,……,D4i-3,D4i-2,D4i-1, D4i,……,D4N-3,D4N-2,D4N-1,D4NWith resonant capacitance Cs1,Cs2,Cs3,Cs4,……,Cs4i-3,Cs4i-2,Cs4i-1, Cs4i,……,Cs4N-3,Cs4N-2,Cs4N-1,Cs4NComposition.Device for power switching S1Negative pole end and diode D1Cathode terminal connection Form a bridge arm, device for power switching S2Positive terminal and diode D2Anode tap connect to form another bridge arm, by two Bridge arm is in parallel to form a half-bridge；Device for power switching S3Negative pole end and diode D3Cathode terminal connect to form a bridge arm, Device for power switching S4Positive terminal and diode D4Anode tap connect to form another bridge arm, formed two bridge arms are in parallel One half-bridge, two half-bridges are in parallel to form double down pressure full-bridge inverter；
Device for power switching S4N-3Negative pole end and diode D4N-3Cathode terminal connect to be formed one shunting bridge arm, power Switching device S4N-2Positive terminal and diode D4N-2Anode tap connect to be formed another shunting bridge arm, by two bridge arm parallel connections Form a half-bridge；Device for power switching S4N-1Negative pole end and diode D4N-1Cathode terminal connect to form a bridge arm, power Switching device S4NPositive terminal and diode D4NAnode tap connect to form another bridge arm, form one by two bridge arms are in parallel A half-bridge, two half-bridges are in parallel to form double down pressure full-bridge inverter；The positive terminal of the double down more full-bridge inverters of pressure is connected to directly Power positive end is flowed, its negative pole end is connected to the negative pole end of DC power supply.Resonant capacitance Cs1,Cs2,……,Cs4NRespectively in order With corresponding device for power switching S1,S2,……,S4NIt is in parallel.
Similarly, corresponding device for power switching S4i-3Negative pole end and diode D4i-3Cathode terminal connect to form a bridge Arm, device for power switching S4i-2Positive terminal and diode D4i-2Anode tap connect to form another bridge arm, by two bridge arms simultaneously Connection forms a half-bridge；Device for power switching S4i-1Negative pole end and diode D4i-1Cathode terminal connect to form a bridge arm, work( Rate switching device S4iPositive terminal and diode D4iAnode tap connect to form another bridge arm, formed two bridge arms are in parallel One half-bridge, two half-bridges are in parallel to form double down pressure full-bridge inverter.
In the above-described embodiments, first kind bridge arm is by the 4i-3 device for power switching S and corresponding 4i-3 two The bridge arm of pole pipe D compositions, the second class bridge arm is by the 4i-2 device for power switching S and corresponding the 4i-2 diode D groups Into bridge arm；The bridge that three classes bridge arm is made of the 4i-1 device for power switching S and corresponding the 4i-1 diode D Arm, the bridge arm that the 4th class bridge arm is made of the 4i device for power switching S and corresponding the 4i diode D.Resonant capacitance Cs1,Cs2,Cs3,Cs4,……,Cs4N-3,Cs4N-2,Cs4N-1,Cs4NIt can be external capacitor, can also be device for power switching respectively S1,S2,S3,S4,……,S4N-3,S4N-2,S4N-1,S4NInternal parasitic capacitance.
In a preferred embodiment, resonant network is included by the first derided capacitors Cd1, the second derided capacitors Cd2, the 3rd point Voltage capacitance Cd3The 4N resonant tank formed with 4N resonance modules, the number of resonance modules is identical with the number of bridge arm, wherein N For positive integer；
Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in DC power source unit both ends, Derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection DC power source unit Negative pole end；
Resonance modules include：First kind resonance modules, the second class resonance modules, three classes resonance modules and the 4th class resonance Module, first kind resonance modules are corresponding with first kind bridge arm, and the second class resonance modules are corresponding with the second class bridge arm, three classes resonance Module is corresponding with three classes bridge arm, and the 4th class resonance modules are corresponding with the 4th class bridge arm；
The input terminal of first kind resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, first The output terminal of class resonance modules is connected with the output terminal of first kind bridge arm, to form resonant tank all the way；
The input terminal of second class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, second The output terminal of class resonance modules is connected with the output terminal of the second class bridge arm, to form resonant tank all the way；
The input terminal of three classes resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the 3rd The output terminal of class resonance modules is connected with the output terminal of three classes bridge arm, to form resonant tank all the way；
The input terminal of 4th class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the 4th The output terminal of class resonance modules is connected with the output terminal of the 4th class bridge arm, to form resonant tank all the way.
In the present embodiment, when inversion circuit includes a full-bridge pair pressure drop full-bridge inverter, soft switch power amplification Device is full-bridge soft-switching power amplifier.As shown in figure 5, device for power switching S '1Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '1Negative pole end be connected to resonant inductance L '1One end, Resonant inductance L '1The other end be connected to diode D '1Anode tap, diode D '1Cathode terminal be connected to device for power switching S1Negative pole end；Device for power switching S '2Positive terminal be connected to device for power switching S2Positive terminal, device for power switching S '2 Negative pole end be connected to resonant inductance L '2One end, resonant inductance L '2The other end be connected to diode D '2Anode tap, two Pole pipe D '2Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；Device for power switching S '3 Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '3Anode End is connected to resonant inductance L '3One end, resonant inductance L '3The other end be connected to diode D '3Anode tap, diode D '3 Cathode terminal be connected to device for power switching S3Negative pole end；Device for power switching S '4Positive terminal be connected to device for power switching S4Positive terminal, device for power switching S '4Negative pole end be connected to resonant inductance L '4One end, resonant inductance L '4The other end It is connected to diode D '4Anode tap, diode D '4Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3 Tie point on.Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in DC power source unit two End, derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection DC power source unit Negative pole end.
When inversion circuit includes multiple full-bridges in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is full-bridge Soft switch power amplifier in parallel.As shown in figure 4, resonant network is by device for power switching S '1,S′2,S′3,S′4,……,S ′4i-3,S′4i-2,S′4i-1,S′4i,……,S′4N-3,S′4N-2,S′4N-1,S′4N, diode D ' 1, D ' 2, D '3,D′4,……, D′4i-3,D′4i-2,D′4i-1,D′4i,……,D′4N-3,D′4N-2,D′4N-1,D′4N, resonant inductance L '1,L′2,L′3,L′4,……, L′4i-3,L′4i-2,L′4i-1,L′4i,……,L′4N-3,L′4N-2,L′4N-1,L′4N, the first derided capacitors Cd1, the second derided capacitors Cd2 With the 3rd derided capacitors Cd3Composition.Device for power switching S '1Positive terminal be connected to the first derided capacitors Cd1With the second partial pressure electricity Hold Cd2Tie point on, device for power switching S '1Negative pole end be connected to resonant inductance L '1One end, resonant inductance L '1It is another One end is connected to diode D '1Anode tap, diode D '1Cathode terminal be connected to device for power switching S1Negative pole end；Power Switching device S '2Positive terminal be connected to device for power switching S2Positive terminal, device for power switching S '2Negative pole end be connected to Resonant inductance L '2One end, resonant inductance L '2The other end be connected to diode D '2Anode tap, diode D '2Cathode terminal It is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；Device for power switching S '3Positive terminal be connected to First derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '3Negative pole end be connected to resonance electricity Feel L '3One end, resonant inductance L '3The other end be connected to diode D '3Anode tap, diode D '3Cathode terminal be connected to Device for power switching S3Negative pole end；Device for power switching S '4Positive terminal be connected to device for power switching S4Positive terminal, work( Rate switching device S '4Negative pole end be connected to resonant inductance L '4One end, resonant inductance L '4The other end be connected to diode D′4Anode tap, diode D '4Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；
Similarly, corresponding device for power switching S '4i-3Positive terminal be connected to the first derided capacitors Cd1With the second partial pressure electricity Hold Cd2Tie point on, device for power switching S '4i-3Negative pole end be connected to resonant inductance L '4i-3One end,Resonant inductance L′4i-3The other end be connected to diode D '4i-3Anode tap, diode D '4i-3Cathode terminal be connected to device for power switching S4i-3Negative pole end；Device for power switching S '4i-2Positive terminal be connected to device for power switching S4i--2Positive terminal, power switch Device S '4i-2Negative pole end be connected to resonant inductance L '4i-2One end, resonant inductance L '4i-2The other end be connected to diode D′4i-2Anode tap, diode D '4i-2Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point On；Device for power switching S '4i-1Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, work( Rate switching device S '4i-1Negative pole end be connected to resonant inductance L '4i-1One end, resonant inductance L '4i-1The other end be connected to two Pole pipe D '4i-1Anode tap, diode D '4i-1Cathode terminal be connected to device for power switching S4i-1Negative pole end；Power switch device Part S '4iPositive terminal be connected to device for power switching S4NPositive terminal, device for power switching S '4iNegative pole end be connected to resonance Inductance L '4iOne end, resonant inductance L '4iThe other end be connected to diode D '4iAnode tap, diode D '4iCathode terminal connect It is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on.
Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in DC power source unit both ends, Derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection DC power source unit Negative pole end.
In the present embodiment, first kind resonance modules are by the 4i-3 device for power switching S ', corresponding 4i-3 a two The resonance modules of pole pipe D ' and corresponding the 4i-3 resonant inductance L ' compositions；Second class resonance modules are opened by the 4i-2 power Close the resonance modules of device S ', corresponding 4i-2 diode D ' and corresponding the 4i-2 resonant inductance L ' compositions；3rd Class resonance modules are by the 4i-1 device for power switching S ', corresponding 4i-1 diode D ' and corresponding the 4i-1 resonance The resonance modules of inductance L ' compositions；4th class resonance modules are by the 4i device for power switching S ', corresponding the 4i diode The 4th class resonance modules of D ' and corresponding the 4i resonant inductance L ' compositions.
In a preferred embodiment, filter network is included by the first filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter Ripple capacitance Cf3, the 4th filter capacitor Cf4The 4N filter circuit formed with 4N filter module, the number and bridge arm of filter module Number it is identical, wherein N is positive integer；
First filter capacitor Cf1With the second filter capacitor Cf2It is series at DC power source unit both ends, the first filter capacitor Cf1 One end connection DC power source unit positive terminal, the second filter capacitor Cf2One end connection DC power source unit negative pole end, One end of load is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
3rd filter capacitor Cf3With the 4th filter capacitor Cf4It is series at DC power source unit both ends, the 3rd filter capacitor Cf3 One end connection DC power source unit positive terminal, the 4th filter capacitor Cf4One end connection DC power source unit negative pole end, The other end of load is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；
Filter module includes：First kind filter module, the second class filter module, three classes filter module and the filtering of the 4th class Module, first kind filter module is corresponding with first kind bridge arm, and the second class filter module is corresponding with the second class bridge arm, three classes filtering Module is corresponding with three classes bridge arm, and the 4th class filter module is corresponding with the 4th class bridge arm；
The output terminal of the input terminal connection first kind bridge arm of first kind filter module, the output terminal of first kind filter module connect It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
The input terminal of second class filter module connects the output terminal of the second class bridge arm, and the output terminal of the second class filter module connects It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
The output terminal of the input terminal connection three classes bridge arm of three classes filter module, the output terminal of three classes filter module connect It is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；
The input terminal of 4th class filter module connects the output terminal of the 4th class bridge arm, and the output terminal of the 4th class filter module connects It is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
In the present embodiment, when inversion circuit includes a full-bridge pair pressure drop full-bridge inverter, soft switch power amplification Device is full-bridge soft-switching power amplifier.As shown in figure 5, filter network is by filter inductance L1,L2,L3,L4, the first filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Composition.Filter inductance L1One end be connected to Device for power switching S1Negative pole end, filter inductance L1The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2 Between；Filter inductance L2One end be connected to device for power switching S2Positive terminal, filter inductance L2The other end be connected to first Filter capacitor Cf1With the second filter capacitor Cf2Between；Filter inductance L3One end be connected to device for power switching S3Negative pole end, Filter inductance L3The other end be connected to the first filter capacitor Cf3With the second filter capacitor Cf4Between；Filter inductance L4One end connect It is connected to device for power switching S4Positive terminal, filter inductance L4The other end be connected to the first filter capacitor Cf3With the second filtered electrical Hold Cf4Between；3rd filter capacitor Cf3With the 4th filter capacitor Cf4It is series at DC power source unit both ends, the 3rd filter capacitor Cf3 One end connection DC power source unit positive terminal, the 4th filter capacitor Cf4One end connection DC power source unit negative pole end, The other end of load is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
When inversion circuit includes multiple full-bridges in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is full-bridge Soft switch power amplifier in parallel.As shown in figure 4, filter network is by filter inductance L1,L2,L3,L4,……,L4i-3,L4i-2, L4i-1,L4i,……,L4N-3,L4N-2,L4N-1,L4N, the first filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter capacitor Cf3With 4th filter capacitor Cf4Composition.
Filter module uses filter inductance L；First kind resonance modules use the 4i-3 filter inductance L, with the first kind Bridge arm and first kind resonance modules correspond to；Second class resonance modules use the 4i-2 filter inductance L, with the second class bridge arm and Second class resonance modules correspond to；Three classes resonance modules use the 4i-1 filter inductance L, with three classes bridge arm and three classes Resonance modules correspond to；4th class resonance modules use the 4i filter inductance L, with the 4th class bridge arm and the 4th class resonance modules It is corresponding.The 4i-3 filter inductance L and the 4i filter inductance L can be wound on a magnetic core at the same time；The 4i-2 filtered electrical Sense L and the 4i-1 filter inductance L can be wound on a magnetic core at the same time.
When inversion circuit includes multiple full-bridges in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is full-bridge Soft switch power amplifier in parallel.As shown in figure 4, filter network is by filter inductance L1,L2,L3,L4,……,L4i-3,L4i-2, L4i-1,L4i,……,L4N-3,L4N-2,L4N-1,L4N, the first filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter capacitor Cf3With 4th filter capacitor Cf4Composition.Filter inductance L1One end be connected to device for power switching S1Negative pole end, filter inductance L1It is another One end is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；Filter inductance L2One end be connected to power switch device Part S2Positive terminal, filter inductance L2The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；Filtering Inductance L3One end be connected to device for power switching S3Negative pole end, filter inductance L3The other end be connected to the first filter capacitor Cf3With the second filter capacitor Cf4Between；Filter inductance L4One end be connected to device for power switching S4Positive terminal, filter inductance L4The other end be connected to the first filter capacitor Cf3With the second filter capacitor Cf4Between.
Similarly, corresponding filter inductance L4i-3One end be connected to device for power switching S4i-3Negative pole end, filter inductance L4i-3The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；Filter inductance L4i-2One end be connected to Device for power switching S4i-2Positive terminal, filter inductance L4i-2The other end be connected to the first filter capacitor Cf1With the second filtered electrical Hold Cf2Between；Filter inductance L4i-1One end be connected to device for power switching S4i-1Negative pole end, filter inductance L4i-1The other end It is connected to the first filter capacitor Cf3With the second filter capacitor Cf4Between；Filter inductance L4iOne end be connected to device for power switching S4iPositive terminal, filter inductance L4iThe other end be connected to the first filter capacitor Cf3With the second filter capacitor Cf4Between.
First filter capacitor Cf3One end connection DC power source unit positive terminal, the second filter capacitor Cf4One end connect Connect the negative pole end of DC power source unit.
In a preferred embodiment, inversion circuit further includes at least one three classes half-bridge switch power cell, three classes The number of half-bridge switch power cell and the number of first kind half-bridge switch power cell and the second class half-bridge switch power cell Number it is identical；Three classes half-bridge switch power cell and first kind half-bridge switch power cell and the second class half-bridge switch power Unit corresponds, three classes half-bridge switch power cell and corresponding first kind half-bridge switch power cell and the second class half-bridge The switch power unit three-phase pair in parallel that formed will press full-bridge inverter；
Bridge arm further includes the 5th class bridge arm and the 6th class bridge arm, the 5th class bridge arm bridge arm composition in parallel with the 6th class bridge arm The double pressure drop half-bridge inverters of three classes；
The positive terminal of the positive terminal connection DC power source unit of 5th class bridge arm, the negative pole end connection direct current of the 5th class bridge arm The negative pole end of power supply unit；
The positive terminal of the negative pole end connection DC power source unit of 6th class bridge arm, the positive terminal connection direct current of the 6th class bridge arm The negative pole end of power supply unit.
In the present embodiment, when inversion circuit includes a three-phase pair pressure drop full-bridge inverter, soft switch power amplification Device is three phase full bridge soft switch power amplifier.As shown in fig. 7, three phase full bridge parallel inverter circuit is by device for power switching S1, S2,S3,S4,S5,S6, diode D1,D2,D3,D4,D5,D6With resonant capacitance Cs1,Cs2,Cs3,Cs4,Cs5,Cs6Composition.Power switch Device S1Negative pole end and diode D1Cathode terminal connect to form a bridge arm, device for power switching S2Positive terminal and two poles Pipe D2Anode tap connect to form another bridge arm, form a half-bridges by two bridge arms are in parallel；Device for power switching S3Anode End and diode D3Cathode terminal connect to form a bridge arm, device for power switching S4Positive terminal and diode D4Anode tap Connection forms another bridge arm；Device for power switching S5Negative pole end and diode D5Cathode terminal connect to form a bridge arm, work( Rate switching device S6Positive terminal and diode D6Anode tap connect to form another bridge arm, by two bridge arm parallel connections, form one Another a half-bridge, three half-bridges are in parallel to form the double down pressure full-bridge inverter of three-phase.The double down pressure full-bridge inverter of three-phase is just DC power anode end extremely is connected to, its negative pole end is connected to the negative pole end of DC power supply.Resonant capacitance Cs1,Cs2,……, Cs6Respectively in order with corresponding device for power switching S1,S2,……,S6It is in parallel.
When inversion circuit includes multiple three-phases in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is three-phase Full-bridge parallel connection soft switch power amplifier.As shown in fig. 6, three phase full bridge parallel inverter circuit is by device for power switching S1,S2,S3, S4,S5,S6,……,S6i-5,S6i-4,S6i-3,S6i-2,S6i-1,S6i,……,S6N-5,S6N-4,S6N-3,S6N-2,S6N-1,S6N, diode D1,D2,D3,D4,D5,D6,……,D6i-5,D6i-4,D6i-3,D6i-2,D6i-1,D6i,……,D6N-5,D6N-4,D6N-3,D6N-2,D6N-1, D6NWith resonant capacitance Cs1,Cs2,Cs3,Cs4,Cs5,Cs6,……,Cs6i-5,Cs6i-4,Cs6i-3,Cs6i-2,Cs6i-1,Cs6i,……, Cs6N-5,Cs6N-4,Cs6N-3,Cs6N-2,Cs6N-1,Cs6NComposition.Device for power switching S1Negative pole end and diode D1Cathode terminal connect Connect to form a bridge arm, device for power switching S2Positive terminal and diode D2Anode tap connect to form another bridge arm, by two A bridge arm is in parallel to form a half-bridge；Device for power switching S3Negative pole end and diode D3Cathode terminal connect to form a bridge Arm, device for power switching S4Positive terminal and diode D4Anode tap connect to form another bridge arm；Device for power switching S5's Negative pole end and diode D5Cathode terminal connect to form a bridge arm, device for power switching S6Positive terminal and diode D6Sun Extreme connection forms another bridge arm, by two bridge arm parallel connections, forms another half-bridge, three half-bridges are in parallel to form three Mutually double down pressure full-bridge inverter；
Similarly, corresponding device for power switching S6i-5Negative pole end and diode D6i-5Cathode terminal connect to form one point Flow bridge arm, device for power switching S6i-4Positive terminal and diode D6i-4Anode tap connect to be formed another shunting bridge arm, by two A bridge arm is in parallel to form a half-bridge；Device for power switching S6i-3Negative pole end and diode D6i-3Cathode terminal connect to form one A shunting bridge arm, device for power switching S6i-2Positive terminal and diode D6i-2Anode tap connect to be formed another shunting bridge arm, By two bridge arms, one half-bridge of formation in parallel；Device for power switching S6i-1Negative pole end and diode D6i-1Cathode terminal connection shape Into a bridge arm, device for power switching S6iPositive terminal and diode D6iAnode tap connect to form another bridge arm, by two Bridge arm is in parallel to form another half-bridge, and three half-bridges are in parallel to form the double down pressure full-bridge inverter of three-phase；；Multiple three-phases are double The half-bridge of decompression full-bridge inverter composes in parallel the double down more full-bridge inverters of pressure of three-phase, its positive terminal is connected to DC power anode End, its negative pole end are connected to the negative pole end of DC power supply.Resonant capacitance Cs1,Cs2,……,Cs6NRespectively in order with corresponding work( Rate switching device S1,S2,……,S6NIt is in parallel.
In the above-described embodiments, first kind bridge arm is by the 6i-5 device for power switching S and corresponding 6i-5 two The bridge arm of pole pipe D compositions, the second bridge arm are made of the 6i-4 device for power switching S and corresponding the 6i-4 diode D Bridge arm；The bridge arm that three classes bridge arm is made of the 6i-3 device for power switching S and corresponding the 6i-3 diode D, The bridge arm that 4th class bridge arm is made of the 6i-2 device for power switching S and corresponding the 6i-2 diode D；5th class bridge The bridge arm that arm is made of the 6i-1 device for power switching S and corresponding the 6i-1 diode D, the 6th class bridge arm are by The bridge arm of 6i device for power switching S and corresponding the 6i diode D compositions.Resonant capacitance Cs1,Cs2,Cs3,Cs4,Cs5, Cs6,……,Cs6N-5,Cs6N-4,Cs6N-3,Cs6N-2,Cs6N-1,Cs6NIt can be external capacitor, can also be device for power switching respectively S1,S2,S3,S4,S5,S6,……,S6N-5,S6N-4,S6N-3,S6N-2,S6N-1,S6NInternal parasitic capacitance.
In a preferred embodiment, resonant network is included by the first derided capacitors Cd1, the second derided capacitors Cd2, the 3rd point Voltage capacitance Cd3The 6N resonant tank formed with 6N resonance modules, the number of resonance modules is identical with the number of bridge arm, wherein N For positive integer；
Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in DC power source unit both ends, Derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection DC power source unit Negative pole end；
Resonance modules include：First kind resonance modules, the second class resonance modules, three classes resonance modules, the 4th class resonance Module, the 5th class resonance modules and the 6th class resonance modules, first kind resonance modules are corresponding with first kind bridge arm, the second class resonance Module is corresponding with the second class bridge arm, and three classes resonance modules are corresponding with three classes bridge arm, the 4th class resonance modules and the 4th class bridge Arm corresponds to, and the 5th class resonance modules are corresponding with the 5th class bridge arm, and the 6th class resonance modules are corresponding with the 6th class bridge arm；
The input terminal of first kind resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, first The output terminal of class resonance modules is connected with the output terminal of first kind bridge arm, to form resonant tank all the way；
The input terminal of second class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, second The output terminal of class resonance modules is connected with the output terminal of the second class bridge arm, to form resonant tank all the way；
The input terminal of three classes resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the 3rd The output terminal of class resonance modules is connected with the output terminal of three classes bridge arm, to form resonant tank all the way；
The input terminal of 4th class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the 4th The output terminal of class resonance modules is connected with the output terminal of the 4th class bridge arm, to form resonant tank all the way；
The input terminal of 5th class resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the 5th The output terminal of class resonance modules is connected with the output terminal of the 5th class bridge arm, to form resonant tank all the way；
The input terminal of 6th class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the 6th The output terminal of class resonance modules is connected with the output terminal of the 6th class bridge arm, to form resonant tank all the way.
In the present embodiment, when inversion circuit includes a three-phase pair pressure drop full-bridge inverter, soft switch power amplification Device is three phase full bridge parallel connection soft switch power amplifier.As shown in fig. 7, resonant network is by device for power switching S '1,S′2,S′3, S′4,S′5,S′6, diode D '1,D′2,D′3,D′4,D′5,D′6, resonant inductance L '1,L′2,L′3,L′4,L′5,L′6, the first partial pressure Capacitance Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3Composition.Device for power switching S '1Positive terminal be connected to first Derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '1Negative pole end be connected to resonant inductance L '1 One end, resonant inductance L '1The other end be connected to diode D '1Anode tap, diode D '1Cathode terminal be connected to power Switching device S1Negative pole end；Device for power switching S '2Positive terminal be connected to device for power switching S2Positive terminal, power opens Close device S '2Negative pole end be connected to resonant inductance L '2One end, resonant inductance L '2The other end be connected to diode D '2's Anode tap, diode D '2Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；Power is opened Close device S '3Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S′3Negative pole end be connected to resonant inductance L '3One end, resonant inductance L '3The other end be connected to diode D '3Anode tap, Diode D '3Cathode terminal be connected to device for power switching S3Negative pole end；Device for power switching S '4Positive terminal be connected to work( Rate switching device S4Positive terminal, device for power switching S '4Negative pole end be connected to resonant inductance L '4One end, resonant inductance L′4The other end be connected to diode D '4Anode tap, diode D '4Cathode terminal be connected to the second derided capacitors Cd2With the 3rd Derided capacitors Cd3Tie point on；Device for power switching S '5Positive terminal be connected to the first derided capacitors Cd1With the second partial pressure electricity Hold Cd2Tie point on, device for power switching S '5Negative pole end be connected to resonant inductance L '5One end, resonant inductance L '5It is another One end is connected to diode D '5Anode tap, diode D '5Cathode terminal be connected to device for power switching S5Negative pole end；Power Switching device S '6Positive terminal be connected to device for power switching S6Positive terminal, device for power switching S '6Negative pole end be connected to Resonant inductance L '6One end, resonant inductance L '6The other end be connected to diode D '6Anode tap, diode D '6Cathode terminal It is connected to the second derided capacitors Cd2On the tie point of the 3rd derided capacitors Cd3；Derided capacitors Cd1, the second derided capacitors Cd2With 3rd derided capacitors Cd3It is sequentially connected in series in DC power source unit both ends, derided capacitors Cd1One end connection DC power source unit Positive terminal, derided capacitors Cd3One end connection DC power source unit negative pole end.
When inversion circuit includes multiple three-phases in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is three-phase Full-bridge parallel connection soft switch power amplifier.As shown in fig. 6, resonant network is by device for power switching S '1,S′2,S′3,S′4,S′5, S′6,……,S′6i-5,S′6i-4,S′6i-3,S′6i-2,S′6i-1,S′6i,……,S′6N-5,S′6N-4,S′6N-3,S′6N-2,S′6N-1, S′6N, diode D '1,D′2,D′3,D′4,D′5,D′6,……,D′6i-5,D′6i-4,D′6i-3,D′6i-2,D′6i-1,D′6i,……, D′6N-5,D′6N-4,D′6N-3,D′6N-2,D′6N-1,D′6N, resonant inductance L '1,L′2,L′3,L′4,L′5,L′6,……,L′6i-5, L′6i-4,L′6i-3,L′6i-2,L′6i-1,L′6i,……,L′6N-5,L′6N-4,L′6N-3,L′6N-2,L′6N-1,L′6N, the first derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3Composition.
Device for power switching S '1Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point On, device for power switching S '1Negative pole end be connected to resonant inductance L '1One end, resonant inductance L '1The other end be connected to two Pole pipe D '1Anode tap, diode D '1Cathode terminal be connected to device for power switching S1Negative pole end；Device for power switching S '2 Positive terminal be connected to device for power switching S2Positive terminal, device for power switching S '2Negative pole end be connected to resonant inductance L '2 One end, resonant inductance L '2The other end be connected to diode D '2Anode tap, diode D '2Cathode terminal be connected to second Derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；Device for power switching S '3Positive terminal be connected to the first partial pressure electricity Hold Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '3Negative pole end be connected to resonant inductance L '3One End, resonant inductance L '3The other end be connected to diode D '3Anode tap, diode D '3Cathode terminal be connected to power switch Device S3Negative pole end；Device for power switching S '4Positive terminal be connected to device for power switching S4Positive terminal, power switch device Part S '4Negative pole end be connected to resonant inductance L '4One end, resonant inductance L '4The other end be connected to diode D '4Anode End, diode D '4Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；Power switch device Part S '5Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '5's Negative pole end is connected to resonant inductance L '5One end, resonant inductance L '5The other end be connected to diode D '5Anode tap, two poles Pipe D '5Cathode terminal be connected to device for power switching S5Negative pole end；Device for power switching S '6Positive terminal be connected to power and open Close device S6Positive terminal, device for power switching S '6Negative pole end be connected to resonant inductance L '6One end, resonant inductance L '6's The other end is connected to diode D '6Anode tap, diode D '6Cathode terminal be connected to the second derided capacitors Cd2With the 3rd partial pressure Capacitance Cd3Tie point on；
Similarly, corresponding device for power switching S '6i-5Positive terminal be connected to the first derided capacitors Cd1With the second partial pressure electricity Hold Cd2Tie point on, device for power switching S '6i-5Negative pole end be connected to resonant inductance L '6i-5One end, resonant inductance L′6i-5The other end be connected to diode D '6i-5Anode tap, diode D '6i-5Cathode terminal be connected to device for power switching S6i-5Negative pole end；Device for power switching S '6i-4Positive terminal be connected to device for power switching S6i-4Positive terminal, power switch Device S '6i-4Negative pole end be connected to resonant inductance L '6i-4One end, resonant inductance L '6i-4The other end be connected to diode D′6i-4Anode tap, diode D '6i-4Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point On；Device for power switching S '6i-3Positive terminal be connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, work( Rate switching device S '6i-3Negative pole end be connected to resonant inductance L '6i-3One end, resonant inductance L '6i-3The other end be connected to two Pole pipe D '6i-3Anode tap, diode D '6i-3Cathode terminal be connected to device for power switching S6i-3Negative pole end；Power switch device Part S '6i-2Positive terminal be connected to device for power switching S6i-2Positive terminal, device for power switching S '6i-2Negative pole end be connected to Resonant inductance L '6i-2One end, resonant inductance L '6i-2The other end be connected to diode D '6i-2Anode tap, diode D '6i-2 Cathode terminal be connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Tie point on；Device for power switching S '6i-1Just Extremely it is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Tie point on, device for power switching S '6i-1Negative pole end It is connected to resonant inductance L '6i-1One end, resonant inductance L '6i-1The other end be connected to diode D '6i-1Anode tap, two poles Pipe D '6i-1Cathode terminal be connected to device for power switching S6i-1Negative pole end；Device for power switching S '6iPositive terminal be connected to work( Rate switching device S6iPositive terminal, device for power switching S '6iNegative pole end be connected to resonant inductance L '6iOne end, resonant inductance L′6iThe other end be connected to diode D '6iAnode tap, diode D '6iCathode terminal be connected to the second derided capacitors Cd2With Three derided capacitors Cd3Tie point on；Derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in straight Galvanic electricity source unit both ends, derided capacitors Cd1One end connection DC power source unit positive terminal, derided capacitors Cd3One end connection The negative pole end of DC power source unit.
In the present embodiment, first kind resonance modules are by the 6i-5 device for power switching S ', corresponding 6i-5 a two The resonance modules of pole pipe D ' and corresponding the 6i-5 resonant inductance L ' compositions；Second class resonance modules are opened by the 6i-4 power Close the resonance modules of device S ', corresponding 6i-4 diode D ' and corresponding the 6i-4 resonant inductance L ' compositions；3rd Class resonance modules are by the 6i-3 device for power switching S ', corresponding 6i-3 diode D ' and corresponding the 6i-3 resonance The resonance modules of inductance L ' compositions；4th class resonance modules are by the 6i-2 device for power switching S ', corresponding 6i-2 a two The resonance modules of pole pipe D ' and corresponding the 6i-2 resonant inductance L ' compositions；5th class resonance modules are opened by the 6i-1 power Close the resonance modules of device S ', corresponding 6i-1 diode D ' and corresponding the 6i-1 resonant inductance L ' compositions；6th Class resonance modules are by the 6i device for power switching S ', corresponding 6i diode D ' and corresponding the 6i resonant inductance L ' The resonance modules of composition.
Above-mentioned device for power switching can use metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, abbreviation MOSFET), or power transistor (Giant Transistor, abbreviation GTR) or Insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, abbreviation IGBT).
In a preferred embodiment, filter network is included by the first filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter Ripple capacitance Cf3, the 4th filter capacitor Cf4, the 5th filter capacitor Cf5, the 6th filter capacitor Cf6The 6N formed with 6N filter module A filter circuit, the number of filter module is identical with the number of bridge arm, and wherein N is positive integer；
First filter capacitor Cf1With the second filter capacitor Cf2It is series at DC power source unit both ends, the first filter capacitor Cf1 One end connection DC power source unit positive terminal, the second filter capacitor Cf2One end connection DC power source unit negative pole end, One end of load is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
3rd filter capacitor Cf3With the 4th filter capacitor Cf4It is series at DC power source unit both ends, the 3rd filter capacitor Cf3 One end connection DC power source unit positive terminal, the 4th filter capacitor Cf4One end connection DC power source unit negative pole end, The other end of load is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；
5th filter capacitor Cf5With the 6th filter capacitor Cf6It is series at DC power source unit both ends, the 5th filter capacitor Cf5 One end connection DC power source unit positive terminal, the 6th filter capacitor Cf6One end connection DC power source unit negative pole end, The other end of load is connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；
Filter module includes：First kind filter module, the second class filter module, three classes filter module, the filtering of the 4th class Module, the 5th class filter module and the 6th class filter module, first kind filter module is corresponding with first kind bridge arm, the filtering of the second class Module is corresponding with the second class bridge arm, and three classes filter module is corresponding with three classes bridge arm, the 4th class filter module and the 4th class bridge Arm corresponds to, and the 5th class filter module is corresponding with the 5th class bridge arm, and the 6th class filter module is corresponding with the 6th class bridge arm；
The output terminal of the input terminal connection first kind bridge arm of first kind filter module, the output terminal of first kind filter module connect It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
The input terminal of second class filter module connects the output terminal of the second class bridge arm, and the output terminal of the second class filter module connects It is connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；
The output terminal of the input terminal connection three classes bridge arm of three classes filter module, the output terminal of three classes filter module connect It is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；
The input terminal of 4th class filter module connects the output terminal of the 4th class bridge arm, and the output terminal of the 4th class filter module connects It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
The input terminal of 5th class filter module connects the output terminal of the 5th class bridge arm, and the output terminal of the 5th class filter module connects It is connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；
The input terminal of 6th class filter module connects the output terminal of the 6th class bridge arm, and the output terminal of the 6th class filter module connects It is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
In the present embodiment, when inversion circuit includes multiple three-phases in parallel pair pressure drop full-bridge inverter, Sofe Switch work( Rate amplifier is three phase full bridge parallel connection soft switch power amplifier.As shown in fig. 7, filter network is by filter inductance L1,L2,L3, L4,L5,L6, the first filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4, the 3rd filter Ripple capacitance Cf5With the 4th filter capacitor Cf6Composition.Filter inductance L1One end be connected to device for power switching S1Negative pole end, filter Ripple inductance L1The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between, filter inductance L2One end connection To device for power switching S2Positive terminal, filter inductance L2The other end be connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；Filter inductance L3One end be connected to device for power switching S3Negative pole end, filter inductance L3The other end be connected to Three filter capacitor Cf3With the 4th filter capacitor Cf4Between, filter inductance L4One end be connected to device for power switching S4Cathode End, filter inductance L4The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；Filter inductance L5One End is connected to device for power switching S5Negative pole end, filter inductance L5The other end be connected to the 5th filter capacitor Cf5With the 6th filter Ripple capacitance Cf6Between；Filter inductance L6One end be connected to device for power switching S6Positive terminal, filter inductance L6The other end connect It is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
When inversion circuit includes multiple three-phases in parallel pair pressure drop full-bridge inverter, soft switch power amplifier is three-phase Full-bridge parallel connection soft switch power amplifier.As shown in fig. 6, filter network is by filter inductance L1,L2,L3,L4,L5,L6,……, L6i-5,L6i-4,L6i-3,L6i-2,L6i-1,L6i,……L6N-5,L6N-4,L6N-3,L6N-2,L6N-1,L6N, the first filter capacitor Cf1, second Filter capacitor Cf2, the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4, the 3rd filter capacitor Cf5With the 4th filter capacitor Cf6Group Into.Filter module uses filter inductance L；First kind resonance modules use the 6i-5 filter inductance L, with first kind bridge arm and First kind resonance modules correspond to；Second class resonance modules use the 6i-4 filter inductance L, with the second class bridge arm and the second class Resonance modules correspond to；Three classes resonance modules use the 6i-3 filter inductance L, with three classes bridge arm and three classes resonant mode Block corresponds to；4th class resonance modules use the 6i-2 filter inductance L, with the 4th class bridge arm and the 4th class resonance modules pair Should；5th class resonance modules use the 6i-1 filter inductance L, with corresponding with the 5th class bridge arm and the 5th class resonance modules；The Six class resonance modules use the 6i filter inductance L, with corresponding with the 6th class bridge arm and the 6th class resonance modules.
Filter inductance L1One end be connected to device for power switching S1Negative pole end, filter inductance L1The other end be connected to First filter capacitor Cf1With the second filter capacitor Cf2Between, filter inductance L2One end be connected to device for power switching S2Cathode End, filter inductance L2The other end be connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；Filter inductance L3One End is connected to device for power switching S3Negative pole end, filter inductance L3The other end be connected to the 3rd filter capacitor Cf3With the 4th filter Ripple capacitance Cf4Between, filter inductance L4One end be connected to device for power switching S4Positive terminal, filter inductance L4The other end connect It is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；Filter inductance L5One end be connected to device for power switching S5's Negative pole end, filter inductance L5The other end be connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；Filter inductance L6 One end be connected to device for power switching S6Positive terminal, filter inductance L6The other end be connected to the 3rd filter capacitor Cf3With Four filter capacitor Cf4Between；
Similarly, corresponding filter inductance L6i-5One end be connected to device for power switching S6i-5Negative pole end, filter inductance L6i-5The other end be connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；Filter inductance L6i-4One end be connected to Device for power switching S6i-4Positive terminal, filter inductance L6i-4The other end be connected to the 5th filter capacitor Cf5With the 6th filtered electrical Hold Cf6Between；Filter inductance L6i-3One end be connected to device for power switching S6i-3Negative pole end, filter inductance L6i-3The other end It is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；Filter inductance L6i-2One end be connected to device for power switching S6i-2Positive terminal, filter inductance L6i-2The other end be connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；Filter Ripple inductance L6i-1One end be connected to device for power switching S6i-1Negative pole end, filter inductance L6i-1The other end be connected to the 5th Ripple capacitance Cf5With the 6th filter capacitor Cf6Between；Filter inductance L6iOne end be connected to device for power switching S6iPositive terminal, filter Ripple inductance L6iThe other end be connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
First filter capacitor Cf1One end connection DC power source unit positive terminal, the second filter capacitor Cf2One end connect Connect the negative pole end of DC power source unit.3rd filter capacitor Cf3One end connection DC power source unit positive terminal, the 4th filtering Capacitance Cf4One end connection DC power source unit negative pole end.5th filter capacitor Cf5One end connection DC power source unit Positive terminal, the 6th filter capacitor Cf6One end connection DC power source unit negative pole end.
Although the present invention is described herein with reference to specific embodiment, it should be understood that, these realities Apply the example that example is only principles and applications.It should therefore be understood that exemplary embodiment can be carried out Many modifications, and can be designed that other arrangements, the spirit of the invention limited without departing from appended claims And scope.It should be understood that can be by combining different appurtenances different from the described mode of original claim Profit requires and feature specifically described herein.It will also be appreciated that it can be used with reference to the described feature of separate embodiments In other described embodiments.

Claims (10)

  1. A kind of 1. soft switch power amplifier, it is characterised in that including：DC power source unit, inversion circuit, resonant network and filter Wave network；
    Resonant network is connected between the DC power source unit feeder ear and the output terminal of the inversion circuit；
    It is defeated by the filter network that the inversion circuit to the direct current that exports the DC power source unit is converted to exchange Send to load.
  2. 2. soft switch power amplifier according to claim 1, it is characterised in that the inversion circuit includes at least one First kind half-bridge switch power cell, each first kind half-bridge switch power cell include what is be made of two bridge arms in parallel The double pressure drop half-bridge inverters of the first kind, when the first kind half-bridge switch power cell is multiple, the first kind half-bridge is opened It is connected in parallel between the power cell of pass；
    The bridge arm includes first kind bridge arm and the second class bridge arm, first kind bridge arm bridge arm in parallel with the second class bridge arm The double pressure drop half-bridge inverters of the first kind of composition；
    The positive terminal of the first kind bridge arm connects the positive terminal of the DC power source unit, the negative pole end of the first kind bridge arm Connect the negative pole end of DC power source unit；
    The negative pole end of the second class bridge arm connects the positive terminal of the DC power source unit, the positive terminal of the second class bridge arm Connect the negative pole end of DC power source unit.
  3. 3. soft switch power amplifier according to claim 2, it is characterised in that the resonant network is included by first point Voltage capacitance Cd1, the second derided capacitors Cd2, the 3rd derided capacitors Cd3The 2N resonant tank formed with 2N resonance modules, it is described The number of resonance modules is identical with the number of the bridge arm, and wherein N is positive integer；
    The derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in the DC power source unit Both ends, the derided capacitors Cd1One end connect the positive terminal of the DC power source unit, the derided capacitors Cd3One end connect Connect the negative pole end of the DC power source unit；
    The resonance modules include：First kind resonance modules and the second class resonance modules, the first kind resonance modules with it is described First kind bridge arm corresponds to, and the second class resonance modules are corresponding with the second class bridge arm；
    The input terminal of the first kind resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the The output terminal of a kind of resonance modules is connected with the output terminal of the first kind bridge arm, to form the resonant tank all the way；
    The input terminal of the second class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the The output terminal of two class resonance modules is connected with the output terminal of the second class bridge arm, to form the resonant tank all the way.
  4. 4. soft switch power amplifier according to claim 2, it is characterised in that the filter network is included by the first filter Ripple capacitance Cf1, the second filter capacitor Cf2The 2N filter circuit formed with 2N filter module, the number of the filter module and The number of the bridge arm is identical, and wherein N is positive integer；
    The first filter capacitor Cf1With the second filter capacitor Cf2It is series at the DC power source unit both ends, first filtering Capacitance Cf1One end connect the positive terminal of the DC power source unit, the second filter capacitor Cf2One end connection it is described straight The negative pole end of galvanic electricity source unit, one end of the load are connected to the first filter capacitor Cf1With the second filter capacitor Cf2It Between, the other end ground connection of the load；
    The filter module includes：First kind filter module and the second class filter module, the first kind filter module with it is described First kind bridge arm corresponds to, and the second class filter module is corresponding with the second class bridge arm；
    The input terminal of the first kind filter module connects the output terminal of the first kind bridge arm, the first kind filter module Output terminal is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
    The input terminal of the second class filter module connects the output terminal of the second class bridge arm, the second class filter module Output terminal is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between.
  5. 5. soft switch power amplifier according to claim 2, it is characterised in that the inversion circuit further includes at least one A second class half-bridge switch power cell, number and the first kind half-bridge switch of the second class half-bridge switch power cell The number of power cell is identical；The second class half-bridge switch power cell is a pair of with first kind half-bridge switch power cell one Should, the first kind half-bridge switch power cell and the double pressure drops of corresponding second class half-bridge switch power cell formation in parallel Full-bridge inverter；
    The bridge arm further includes three classes bridge arm and the 4th class bridge arm, three classes bridge arm bridge in parallel with the 4th class bridge arm The double pressure drop half-bridge inverters of the second class of arm composition；
    The positive terminal of the three classes bridge arm connects the positive terminal of the DC power source unit, the negative pole end of the three classes bridge arm Connect the negative pole end of DC power source unit；
    The negative pole end of the 4th class bridge arm connects the positive terminal of the DC power source unit, the positive terminal of the 4th class bridge arm Connect the negative pole end of DC power source unit.
  6. 6. soft switch power amplifier according to claim 5, it is characterised in that the resonant network is included by first point Voltage capacitance Cd1, the second derided capacitors Cd2, the 3rd derided capacitors Cd3The 4N resonant tank formed with 4N resonance modules, it is described The number of resonance modules is identical with the number of the bridge arm, and wherein N is positive integer；
    The derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in the DC power source unit Both ends, the derided capacitors Cd1One end connect the positive terminal of the DC power source unit, the derided capacitors Cd3One end connect Connect the negative pole end of the DC power source unit；
    The resonance modules include：First kind resonance modules, the second class resonance modules, three classes resonance modules and the 4th class resonance Module, the first kind resonance modules are corresponding with the first kind bridge arm, the second class resonance modules and the second class bridge Arm corresponds to, and the three classes resonance modules are corresponding with the three classes bridge arm, the 4th class resonance modules and the 4th class Bridge arm corresponds to；
    The input terminal of the first kind resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the The output terminal of a kind of resonance modules is connected with the output terminal of the first kind bridge arm, to form the resonant tank all the way；
    The input terminal of the second class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the The output terminal of two class resonance modules is connected with the output terminal of the second class bridge arm, to form the resonant tank all the way；
    The input terminal of the three classes resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the The output terminal of three classes resonance modules is connected with the output terminal of the three classes bridge arm, to form the resonant tank all the way；
    The input terminal of the 4th class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the The output terminal of four class resonance modules is connected with the output terminal of the 4th class bridge arm, to form the resonant tank all the way.
  7. 7. soft switch power amplifier according to claim 5, it is characterised in that the filter network is included by the first filter Ripple capacitance Cf1, the second filter capacitor Cf2, the 3rd filter capacitor Cf3, the 4th filter capacitor Cf4The 4N formed with 4N filter module A filter circuit, the number of the filter module is identical with the number of the bridge arm, and wherein N is positive integer；
    The first filter capacitor Cf1With the second filter capacitor Cf2It is series at the DC power source unit both ends, first filtering Capacitance Cf1One end connect the positive terminal of the DC power source unit, the second filter capacitor Cf2One end connection it is described straight The negative pole end of galvanic electricity source unit, one end of the load are connected to the first filter capacitor Cf1With the second filter capacitor Cf2It Between；
    The 3rd filter capacitor Cf3With the 4th filter capacitor Cf4It is series at the DC power source unit both ends, the 3rd filtering Capacitance Cf3One end connect the positive terminal of the DC power source unit, the 4th filter capacitor Cf4One end connection it is described straight The negative pole end of galvanic electricity source unit, the other end of the load are connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4 Between；
    The filter module includes：First kind filter module, the second class filter module, three classes filter module and the filtering of the 4th class Module, the first kind filter module is corresponding with the first kind bridge arm, the second class filter module and the second class bridge Arm corresponds to, and the three classes filter module is corresponding with the three classes bridge arm, the 4th class filter module and the 4th class Bridge arm corresponds to；
    The input terminal of the first kind filter module connects the output terminal of the first kind bridge arm, the first kind filter module Output terminal is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
    The input terminal of the second class filter module connects the output terminal of the second class bridge arm, the second class filter module Output terminal is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
    The input terminal of the three classes filter module connects the output terminal of the three classes bridge arm, the three classes filter module Output terminal is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；
    The input terminal of the 4th class filter module connects the output terminal of the 4th class bridge arm, the 4th class filter module Output terminal is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
  8. 8. soft switch power amplifier according to claim 5, it is characterised in that the inversion circuit further includes at least one A three classes half-bridge switch power cell, number and the first kind half-bridge switch of the three classes half-bridge switch power cell The number of power cell and the number of the second class half-bridge switch power cell are identical；The three classes half-bridge switch power list Member is corresponded with first kind half-bridge switch power cell and the second class half-bridge switch power cell, the three classes half-bridge Switch power unit and the corresponding first kind half-bridge switch power cell and the second class half-bridge switch power cell are simultaneously Connection, which forms three-phase pair, will press full-bridge inverter；
    The bridge arm further includes the 5th class bridge arm and the 6th class bridge arm, the 5th class bridge arm bridge in parallel with the 6th class bridge arm The double pressure drop half-bridge inverters of three classes of arm composition；
    The positive terminal of the 5th class bridge arm connects the positive terminal of the DC power source unit, the negative pole end of the 5th class bridge arm Connect the negative pole end of DC power source unit；
    The negative pole end of the 6th class bridge arm connects the positive terminal of the DC power source unit, the positive terminal of the 6th class bridge arm Connect the negative pole end of DC power source unit.
  9. 9. soft switch power amplifier according to claim 8, it is characterised in that the resonant network is included by first point Voltage capacitance Cd1, the second derided capacitors Cd2, the 3rd derided capacitors Cd3The 6N resonant tank formed with 6N resonance modules, it is described The number of resonance modules is identical with the number of the bridge arm, and wherein N is positive integer；
    The derided capacitors Cd1, the second derided capacitors Cd2With the 3rd derided capacitors Cd3It is sequentially connected in series in the DC power source unit Both ends, the derided capacitors Cd1One end connect the positive terminal of the DC power source unit, the derided capacitors Cd3One end connect Connect the negative pole end of the DC power source unit；
    The resonance modules include：First kind resonance modules, the second class resonance modules, three classes resonance modules, the 4th class resonance Module, the 5th class resonance modules and the 6th class resonance modules, the first kind resonance modules are corresponding with the first kind bridge arm, institute It is corresponding with the second class bridge arm to state the second class resonance modules, the three classes resonance modules are corresponding with the three classes bridge arm, The 4th class resonance modules are corresponding with the 4th class bridge arm, the 5th class resonance modules and the 5th class bridge arm pair Should, the 6th class resonance modules are corresponding with the 6th class bridge arm；
    The input terminal of the first kind resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the The output terminal of a kind of resonance modules is connected with the output terminal of the first kind bridge arm, to form the resonant tank all the way；
    The input terminal of the second class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the The output terminal of two class resonance modules is connected with the output terminal of the second class bridge arm, to form the resonant tank all the way；
    The input terminal of the three classes resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the The output terminal of three classes resonance modules is connected with the output terminal of the three classes bridge arm, to form the resonant tank all the way；
    The input terminal of the 4th class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the The output terminal of four class resonance modules is connected with the output terminal of the 4th class bridge arm, to form the resonant tank all the way；
    The input terminal of the 5th class resonance modules is connected to the first derided capacitors Cd1With the second derided capacitors Cd2Between, the The output terminal of five class resonance modules is connected with the output terminal of the 5th class bridge arm, to form the resonant tank all the way；
    The input terminal of the 6th class resonance modules is connected to the second derided capacitors Cd2With the 3rd derided capacitors Cd3Between, the The output terminal of six class resonance modules is connected with the output terminal of the 6th class bridge arm, to form the resonant tank all the way.
  10. 10. soft switch power amplifier according to claim 8, it is characterised in that the filter network is included by first Filter capacitor Cf1, the second filter capacitor Cf2, the 3rd filter capacitor Cf3, the 4th filter capacitor Cf4, the 5th filter capacitor Cf5, the 6th Filter capacitor Cf6The 6N filter circuit formed with 6N filter module, the number of the filter module and the number of the bridge arm Identical, wherein N is positive integer；
    The first filter capacitor Cf1With the second filter capacitor Cf2It is series at the DC power source unit both ends, first filtering Capacitance Cf1One end connect the positive terminal of the DC power source unit, the second filter capacitor Cf2One end connection it is described straight The negative pole end of galvanic electricity source unit, one end of the load are connected in the first filter capacitor Cf1With the second filter capacitor Cf2 Between；
    The 3rd filter capacitor Cf3With the 4th filter capacitor Cf4It is series at the DC power source unit both ends, the 3rd filtering Capacitance Cf3One end connect the positive terminal of the DC power source unit, the 4th filter capacitor Cf4One end connection it is described straight The negative pole end of galvanic electricity source unit, the other end of the load are connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4 Between；
    The 5th filter capacitor Cf5With the 6th filter capacitor Cf6It is series at the DC power source unit both ends, the 5th filtering Capacitance Cf5One end connect the positive terminal of the DC power source unit, the 6th filter capacitor Cf6One end connection it is described straight The negative pole end of galvanic electricity source unit, the other end of the load are connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6 Between；
    The filter module includes：First kind filter module, the second class filter module, three classes filter module, the filtering of the 4th class Module, the 5th class filter module and the 6th class filter module, the first kind filter module is corresponding with the first kind bridge arm, institute It is corresponding with the second class bridge arm to state the second class filter module, the three classes filter module is corresponding with the three classes bridge arm, The 4th class filter module is corresponding with the 4th class bridge arm, the 5th class filter module and the 5th class bridge arm pair Should, the 6th class filter module is corresponding with the 6th class bridge arm；
    The input terminal of the first kind filter module connects the output terminal of the first kind bridge arm, the first kind filter module Output terminal is connected to the first filter capacitor Cf1With the second filter capacitor Cf2Between；
    The input terminal of the second class filter module connects the output terminal of the second class bridge arm, the second class filter module Output terminal is connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；
    The input terminal of the three classes filter module connects the output terminal of the three classes bridge arm, the three classes filter module Output terminal is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between；
    The input terminal of the 4th class filter module connects the output terminal of the 4th class bridge arm, the 4th class filter module Output terminal is connected to the first wave capacitance Cf1With the second filter capacitor Cf2Between；
    The input terminal of the 5th class filter module connects the output terminal of the 5th class bridge arm, the 5th class filter module Output terminal is connected to the 5th filter capacitor Cf5With the 6th filter capacitor Cf6Between；
    The input terminal of the 6th class filter module connects the output terminal of the 6th class bridge arm, the 6th class filter module Output terminal is connected to the 3rd filter capacitor Cf3With the 4th filter capacitor Cf4Between.
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