CN102082514A - Multi-mode combined AC-AC (alternating current-alternating current) converter based on fly-back converter - Google Patents

Multi-mode combined AC-AC (alternating current-alternating current) converter based on fly-back converter Download PDF

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CN102082514A
CN102082514A CN2009102324767A CN200910232476A CN102082514A CN 102082514 A CN102082514 A CN 102082514A CN 2009102324767 A CN2009102324767 A CN 2009102324767A CN 200910232476 A CN200910232476 A CN 200910232476A CN 102082514 A CN102082514 A CN 102082514A
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input
power switch
high frequency
end connect
elementary
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胡伟
李磊
朱玲
赵勤
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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Abstract

The invention discloses a multi-mode combined AC-AC (alternating current-alternating current) converter based on a fly-back converter, comprising an input AC power supply and an input filter circuit, wherein the input filter circuit comprises an input filter inductor and an input filter capacitor; the multi-mode combined AC-AC converter is composed of the input AC power supply, the input filter circuit, a multi-mode combined converter and an output AC load which are sequentially connected; and the converter converts a high-voltage or low-voltage alternating current into a stable or adjustable high-voltage or low-voltage sine alternating current with the same frequency, reduces number of power conversion stages and realizes high-frequency electric isolation, and is applicable to high-voltage or large-current AC-AC conversion occasions. The invention is composed of uniformly designed basic power conversion units connected in series and in parallel, so a voltage transformer and a four-quadrant power switch module can be designed only for one time, therefore, the design and the manufacture are more convenient; compared with the three-level circuit and the multi-circuit circuit, the multi-mode combined AC-AC converter provided by the invention is formed by combining basic two-level power conversion units, so that power devices are less, the topology of the power circuit is simpler, the control logic is simpler, and the operation is more reliable.

Description

Multimode combination A-A transducer based on anti exciting converter
Technical field
The invention belongs to the Technics of Power Electronic Conversion technology, particularly a kind of multimode connection in series-parallel combination A-A transducer based on anti exciting converter.
Background technology
Friendship-friendship (AC-AC) converter technique is the applied power semiconductor device, convert the AC energy of a certain frequency and amplitude a kind of Semiconductor Converting Technology of the AC energy of same or another frequency and amplitude to, be widely used in national defence, industrial and mining enterprises, scientific research institutions, laboratory in colleges and universities and the daily life.
Up to now, both at home and abroad the power electronics researcher is for the research of A-A transducer, mainly concentrates on the research of two level friendship-friendships such as non-electrical isolation formula, low frequency and high frequency electrical isolation formula and many level A-A transducer; Research for multimode connection in series-parallel combined variable parallel operation, mainly concentrate on DC converter and inverter, and only be confined to the unidirectional power rheology mostly and change, can't realize the feedback of energy, then considerably less for the research of multimode connection in series-parallel combination A-A transducer.Many level of AC-DC-AC type A-A transducer (" A new AC/AC multilevel converter family ", IEEE Transactions on Industrial Electronics, 2005, Vol.52, No.3, pp.662～669.) though and each tool advantage of ac-ac type three-level AC-AC-AC converter, their exist to need auxiliary clamp switch, circuit topology complexity, control strategy complexity, can not reduce shortcoming such as current stress.They be not suitable for input and output wherein a side be the occasion of low-voltage, high-current.People such as Chen Dao refining to the high frequency ac link A-A transducer carried out parallel extended simulation study (AC-AC converter technique [M]. Beijing: Science Press, 2009.).
Summary of the invention
The object of the present invention is to provide a kind of power switch voltage or current stress lower, the filter volume is less, and circuit topology is succinct, control is simple, design is more convenient with production, be convenient to modularization and more be applicable to the A-A transducer of the transformation of electrical energy occasion that input and output side voltage does not wait.
The technical solution that realizes the object of the invention is: a kind of multimode combination A-A transducer based on anti exciting converter, comprise input ac power, input filter circuit, this input filter circuit comprises input filter inductance and input filter capacitor, by the input ac power that connects successively, input filter circuit, multi-module combined converter and output AC load constitute, this converter is transformed into stable or adjustable same frequency high pressure or low pressure sinusoidal ac with high pressure or low-voltage AC, and minimizing Power Conversion progression, realize high frequency electrical isolation, be applicable to high pressure or big electric current ac-ac conversion occasion, promptly this input filter circuit is to input high pressure or low-voltage alternating current power supply filtering, described multi-module combined converter will be transformed to stable or adjustable same frequency high pressure or low pressure sinusoidal ac through the filtered input voltage of input filter circuit, this multi-module combined converter output links to each other with load, this multi-module combined converter comprises a plurality of prime power converter units, an input bleeder circuit and an output filter circuit, this prime power converter unit comprises two four-quadrant power switch modules and a high frequency energy storage transformer that is connected between the two, this four-quadrant power switch module comprises four-quadrant power switch and buffer circuit and drive circuit, and this high frequency energy storage transformer comprises the elementary winding and the secondary winding of coupling; The power switch of each the prime power converter unit in this multi-module combined converter open constantly the phase place 2 π/N that lags behind successively, increased the preceding current ripples frequency of output filter capacitor, through filter circuit filtering, thereby in load, obtain sinusoidal voltage, wherein N is the integer greater than 1, x is for more than or equal to 1 and be less than or equal to the integer of N, and P refers to the converter input side, s converter outlet side.
The present invention compared with prior art, its remarkable advantage: (1) only needs transformer of design and four-quadrant power switch module owing to adopt the prime power converter unit connection in series-parallel of unified design to combine, design with make more convenient; (2) compare with multi-level circuit with three level, owing to adopt two basic level power converter units to combine, thereby power device is less, the power circuit topology is more succinct, and control logic is simpler, and it is more reliable to work; (3) the power switch interleaved switching of each prime power converter unit has improved voltage and current ripples frequency, thereby has reduced filter volume and weight.(4) owing to adopt serial or parallel connection to connect, power switch voltage or current stress are lower.(5) exchange link A-A transducer because each prime power converter unit is single four-quadrant power switch Current-Source Mode High Frequency, have the advantage of high frequency electrical isolation, two stage power conversion (low-frequency ac LFAC-high-frequency ac HFAC-low-frequency ac LFAC), bidirectional power flow.(6) three kinds of different compound modes are applicable to respectively: the ac-ac conversion occasion that input and output side voltage is all higher, low higher ac-ac conversion occasion and the lower ac-ac conversion occasion of the higher outlet side voltage of input side voltage of outlet side voltage of input side voltage.
Below in conjunction with accompanying drawing the present invention is described in further detail.
Description of drawings
Fig. 1 is the circuit structure diagram that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Label name among Fig. 1 is called: the 1-input filter circuit; The 2-multi-module combined converter.
Fig. 2 is input-series and output-parallel (IPOS) the combinatorial topology figure that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 3 is input series and output parallel (ISOP) the combinatorial topology figure that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 4 is input series connection output series connection (ISOS) the combinatorial topology figure that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 5 is the schematic diagram of four kinds of mode of operations that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 5 (a) is the schematic diagram of mode of operation A that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 5 (b) is the schematic diagram of mode of operation B that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 5 (c) is the schematic diagram of mode of operation C that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 5 (d) is the schematic diagram of mode of operation D that the present invention is based on the multimode combination A-A transducer of anti exciting converter.
Fig. 6 (a)～(e) is the simulation waveform figure that the present invention has the multimode combination A-A transducer of two prime power converter units.
Main designation among Fig. 1-Fig. 5: DB-imports bleeder circuit, OFB-output filter circuit, CB 1～CB N-prime power converter unit, Z L-load, G 1p～G Np-elementary four-quadrant power switch module, G 1s～G Ns-secondary four-quadrant power switch module, S 1p～S Np-elementary four-quadrant power switch, S 1s～S Ns-secondary four-quadrant power switch, S 1pa～S Npa, S 1pb～S Npb, S 1sa～S Nsa, S 1sb～S NsbThe unidirectional power switch of-reverse parallel connection diode, T 1～T N-high frequency transformer, N 11～N N1-elementary winding, N 12～N N2-secondary winding, L i-input filter inductance, C i-input filter capacitor, C D1～C DN-input dividing potential drop electric capacity, C F1～C FN-output filter capacitor, u i-input ac power, u o-output AC voltage, i o-output current, i Li-input filter inductance L iElectric current, i DBi-multi-module combined converter 2 input currents, u Ci-input filter capacitor C iVoltage, u CB1i～u CBNi-prime power converter unit input side voltage, i L11～i LN1-prime power converter unit input side electric current, u CB1o～u CBNo-prime power converter unit outlet side voltage, i L12～i LN2-prime power converter unit outlet side electric current.N in the above-mentioned subscript is the integer greater than 1.
Embodiment
In conjunction with Fig. 1, the present invention will carry out the connection in series-parallel combination as the prime power converter unit based on the current source type high frequency ac link A-A transducer of anti exciting converter operation principle work, obtain the multimode combination A-A transducer based on anti exciting converter.Should comprise input ac power u based on the multimode combination A-A transducer of anti exciting converter i, input filter circuit 1, this input filter circuit 1 comprises input filter inductance L iWith input filter capacitor C i, by the input ac power u that connects successively i, input filter circuit 1, multi-module combined converter 2 and output AC load Z LConstitute, this converter is transformed into stable or adjustable same frequency high pressure or low pressure sinusoidal ac with high pressure or low-voltage AC, and reduces Power Conversion progression, realizes high frequency electrical isolation, be applicable to high pressure or big electric current ac-ac conversion occasion, promptly input filter circuit 1 comprises input filter inductance L iWith input filter capacitor C i, this input filter circuit 1 pair of input high pressure or low-voltage alternating current power supply u iFiltering, described multi-module combined converter 2 will be converted into stable or adjustable same frequency high pressure or low pressure sinusoidal ac, this multi-module combined converter 2 outputs and load Z through input filter circuit 1 filtered input voltage LLink to each other, this multi-module combined converter 2 comprises a plurality of prime power converter unit CB 1～CB N, an input bleeder circuit DB and an output filter circuit OFB, this prime power converter unit CB 1～CB NComprise two four-quadrant power switch module G respectively Xp, G XsAnd high frequency energy storage transformer T who is connected between the two x, this four-quadrant power switch module G XpOr G XsComprise four-quadrant power switch S XpOr S XsAnd buffer circuit and drive circuit, this high frequency energy storage transformer T xThe elementary winding N that comprises coupling X1With secondary winding N X2Each prime power converter unit (CB in this multi-module combined converter 2 1～CB N) power switch open constantly the phase place 2 π/N that lags behind successively, increased the equivalent current ripple frequency before the output filter capacitor, through filter circuit OFB filtering, thereby at load Z LOn obtain sinusoidal voltage u o, wherein N is the integer greater than 1, and x is for more than or equal to 1 and be less than or equal to the integer of N, and P refers to the converter input side, s converter outlet side.Above-mentioned " high pressure " and " low pressure " are meant respectively, with respect to the higher or lower voltage of the rated voltage of the power switch that is adopted." big electric current " is meant, with respect to the bigger electric current of the rated current of the power switch that is adopted." stable or adjustable " be meant, can by converter control circuit regulate each prime power converter unit power switch duty cycle adjustment output sinusoidal voltage amplitude or make its maintenance constant.
Fig. 2 is the input-series and output-parallel IPOS combination A-A transducer circuit topology of the present invention's big electric current output HIGH voltage of low input ac-ac conversion occasion of being applicable to high frequency electrical isolation, promptly imports low-voltage alternating current power supply u iAn end and input filter inductance L iOne end connects, this input filter inductance L iThe other end and input filter capacitor C iAn end connect both joint lead-out wires and all high frequency transformer T 1～T NElementary winding N 11～N N1An end connect; This first high frequency transformer T 1Elementary winding N 11The other end and the elementary first four-quadrant power switch S 1pAn end connect; This N high frequency transformer T NElementary winding N N1The other end and elementary N four-quadrant power switch S NpAn end connect; This input filter capacitor C iThe other end and all elementary four-quadrant power switch S 1p～S NpThe other end connect this input filter capacitor C iThe other end and all elementary four-quadrant power switch S 1p～S NpOther end joint lead-out wire and low-voltage alternating current power supply u iThe other end connect; Described input filter inductance L iWith input filter capacitor C iConstitute input filter circuit 1; This first high frequency transformer T 1Secondary winding N 12An end and the first output filter capacitor C F1An end connect both joint lead-out wires and load Z LAn end connect; This first high frequency transformer T 1Secondary winding N 12The other end and the secondary first four-quadrant power switch S 1sAn end connect; This secondary first four-quadrant power switch S 1sThe other end and the first output filter capacitor C F1The other end connect both the joint lead-out wires and the second high frequency transformer T 2Secondary winding N 22An end and the second output filter capacitor C F2An end connect; This i high frequency transformer T iSecondary winding N I2The other end and secondary i four-quadrant power switch S IsAn end connect; This secondary i four-quadrant power switch S IsThe other end and i output filter capacitor C FiThe other end connect both joint lead-out wires and i+1 high frequency transformer T (i+1)Secondary winding N (i+1) 2An end and i+1 output filter capacitor C F (i+1)An end connect; This N-1 high frequency transformer T (N-1)Secondary winding N (N-1) 2The other end and secondary N-1 four-quadrant power switch S (N-1) sAn end connect; This secondary N-1 four-quadrant power switch S (N-1) sThe other end and N-1 output filter capacitor C F (N-1)The other end connect both joint lead-out wires and N high frequency transformer T NSecondary winding N N2An end and N output filter capacitor C FNAn end connect; This N high frequency transformer T NSecondary winding N N2The other end and secondary N four-quadrant power switch S NsAn end connect; This secondary N four-quadrant power switch S NsThe other end and N output filter capacitor C FNThe other end connect both joint lead-out wires and load Z LThe other end connect; Described four-quadrant power switch S XpOr S XsAnd buffer circuit and drive circuit formation four-quadrant power switch module G XpOr G XsDescribed elementary x four-quadrant power switch module G Xp, x high frequency transformer T xWith secondary x four-quadrant power switch module G XsConstitute x prime power converter unit CB xDescribed all output filter capacitor C F1～C FNConstitute output filter circuit OFB; Described all prime power converter unit CB 1～CB NConstitute input-series and output-parallel (IPOS) multi-module combined converter 2 with output filter circuit OFB; Described input ac power u i, input filter circuit 1 and input-series and output-parallel (IPOS) multi-module combined converter 2 constitute input-series and output-parallels (IPOS) combination A-A transducers.
Fig. 3 is input series and output parallel (ISOP) the combination A-A transducer circuit topology of the present invention's big electric current ac-ac conversion of high input voltage low output voltage occasion of being applicable to high frequency electrical isolation, promptly imports high-voltage ac power u iAn end and input filter inductance L iOne end connects, this input filter inductance L iThe other end and input filter capacitor C iAn end connect both the joint lead-out wires and the first high frequency transformer T 1Elementary winding N 11An end and the first input dividing potential drop capacitor C D1An end connect; This first high frequency transformer T 1Elementary winding N 11The other end and the elementary first four-quadrant power switch S 1pAn end connect this elementary first four-quadrant power switch S 1pThe other end and the first input dividing potential drop capacitor C D1The other end connect both the joint lead-out wires and the second high frequency transformer T 2Elementary winding N 21An end and the second input dividing potential drop capacitor C D2An end connect; This i high frequency transformer T iElementary winding N I1The other end and elementary i four-quadrant power switch S IpAn end connect this elementary i four-quadrant power switch S IpThe other end and i input dividing potential drop capacitor C DiThe other end connect both joint lead-out wires and i+1 high frequency transformer T (i+1)Elementary winding N (i+1) 1An end and i+1 input dividing potential drop capacitor C D (i+1)An end connect; This N-1 high frequency transformer T (N-1)Elementary winding N (N-1) 1The other end and elementary N-1 four-quadrant power switch S (N-1) pAn end connect this elementary N-1 four-quadrant power switch S (N-1) pThe other end and N-1 input dividing potential drop capacitor C D (N-1)The other end connect both joint lead-out wires and N high frequency transformer T NElementary winding N N1An end and N input dividing potential drop capacitor C DNAn end connect; This N high frequency transformer T NElementary winding N N1The other end and elementary N four-quadrant power switch S NpAn end connect this elementary N four-quadrant power switch S NpThe other end and N input dividing potential drop capacitor C DNThe other end connect both joint lead-out wires and input filter capacitor C iThe other end and input high-voltage ac power u iThe other end connect; Described input filter inductance L iWith input filter capacitor C iConstitute input filter circuit 1; Described input dividing potential drop capacitor C D1～C DNConstitute input bleeder circuit DB; This first high frequency transformer T 1Secondary winding N 12One end and the secondary first four-quadrant power switch S 1sAn end connect; This N high frequency transformer T NSecondary winding N N2One end and secondary N four-quadrant power switch S NsAn end connect; All secondary four-quadrant power switch S 1s～S NsThe other end and output filter capacitor C fAn end and load Z LAn end connect; This output filter capacitor C fThe other end and all high frequency transformer T 1～T NSecondary winding N 12～N N2The other end and load Z LThe other end connect; Described four-quadrant power switch S XpOr S XsAnd buffer circuit and drive circuit formation four-quadrant power switch module G XpOr G XsDescribed output filter capacitor C fConstitute output filter circuit OFB; Described elementary x four-quadrant power switch module G Xp, x high frequency transformer T xWith secondary x four-quadrant power switch module G XsConstitute x prime power converter unit CB xDescribed all prime power converter unit CB 1～CB N, input bleeder circuit DB and output filter circuit OFB constitute input series and output parallel (ISOP) multi-module combined converter 2; Described input power supply alternating current u i, input filter circuit 1 and input series and output parallel (ISOP) multi-module combined converter 2 constitute input series and output parallel (ISOP) combination A-A transducers.
Fig. 4 is input series connection output series connection (ISOS) the combination A-A transducer circuit topology of the present invention's high input voltage high output voltage ac-ac conversion occasion of being applicable to high frequency electrical isolation, promptly imports high-voltage ac power u iAn end and input filter inductance L iOne end connects, this input filter inductance L iThe other end and input filter capacitor C iAn end connect both the joint lead-out wires and the first high frequency transformer T 1Elementary winding N 11An end and the first input dividing potential drop capacitor C D1An end connect; This first high frequency transformer T 1Elementary winding N 11The other end and the elementary first four-quadrant power switch S 1pAn end connect this elementary first four-quadrant power switch S 1pThe other end and the first input dividing potential drop capacitor C D1The other end connect both the joint lead-out wires and the second high frequency transformer T 2Elementary winding N 21An end and the second input dividing potential drop capacitor C D2An end connect; This i high frequency transformer T iElementary winding N I1The other end and elementary i four-quadrant power switch S IpAn end connect this elementary i four-quadrant power switch S IpThe other end and i input dividing potential drop capacitor C DiThe other end connect both joint lead-out wires and i+1 high frequency transformer T (i+1)Elementary winding N (i+1) 1An end and i+1 input dividing potential drop capacitor C D (i+1)An end connect; This N-1 high frequency transformer T (N-1)Elementary winding N (N-1) 1The other end and elementary N-1 four-quadrant power switch S (N-1) pAn end connect this elementary N-1 four-quadrant power switch S (N-1) pThe other end and N-1 input dividing potential drop capacitor C D (N-1)The other end connect both joint lead-out wires and N high frequency transformer T NElementary winding N N1An end and N input dividing potential drop capacitor C DNAn end connect; This N high frequency transformer T NElementary winding N N1The other end and elementary N four-quadrant power switch S NpAn end connect this elementary N four-quadrant power switch S NpThe other end and N input dividing potential drop capacitor C DNThe other end connect both joint lead-out wires and input filter capacitor C iThe other end and input high-voltage ac power u iThe other end connect; Described input filter inductance L iWith input filter capacitor C iConstitute input filter circuit 1; Described input dividing potential drop capacitor C D1～C DNConstitute input bleeder circuit DB; This first high frequency transformer T 1Secondary winding N 12An end and the first output filter capacitor C F1An end connect both joint lead-out wires and load Z LAn end connect; This first high frequency transformer T 1Secondary winding N 12The other end and the secondary first four-quadrant power switch S 1sAn end connect; This secondary first four-quadrant power switch S 1sThe other end and the first output filter capacitor C F1The other end connect both the joint lead-out wires and the second high frequency transformer T 2Secondary winding N 22An end and the second output filter capacitor C F2An end connect; This i high frequency transformer T iSecondary winding N I2The other end and secondary i four-quadrant power switch S IsAn end connect; This secondary i four-quadrant power switch S IsThe other end and i output filter capacitor C FiThe other end connect both joint lead-out wires and i+1 high frequency transformer T (i+1)Secondary winding N (i+1) 2An end and i+1 output filter capacitor C F (i+1)An end connect; This N-1 high frequency transformer T (N-1)Secondary winding N (N-1) 2The other end and secondary N-1 four-quadrant power switch S (N-1) sAn end connect; This secondary N-1 four-quadrant power switch S (N-1) sThe other end and N-1 output filter capacitor C F (N-1)The other end connect both joint lead-out wires and N high frequency transformer T NSecondary winding N N2An end and N output filter capacitor C FNAn end connect; This N high frequency transformer T NSecondary winding N N2The other end and secondary N four-quadrant power switch S NsAn end connect; This secondary N four-quadrant power switch S NsThe other end and N output filter capacitor C FNThe other end connect both joint lead-out wires and load Z LThe other end connect; Described four-quadrant power switch S XpOr S XsAnd buffer circuit and drive circuit formation four-quadrant power switch module G XpOr G XsDescribed elementary x four-quadrant power switch module G Xp, x high frequency transformer T xWith secondary x four-quadrant power switch module G XsConstitute x prime power converter unit CB xDescribed all output filter capacitor C F1～C FNConstitute output filter circuit OFB; Described all prime power converter unit CB 1～CB N, output filter circuit OFB and input bleeder circuit DB constitute input series connection output series connection (ISOS) multi-module combined converter 2; Described input ac power u i, input filter circuit 1 and input series connection output series connection (ISOS) multi-module combined converter 2 constitute input series connection output series connection (ISOS) combination A-A transducer.
Above-mentioned multimode combination A-A transducer based on anti exciting converter, each four-quadrant power switch S XpOr S XsConstitute by the unidirectional power switch differential concatenation of two backward diodes in parallel and to bear forward, reverse voltage stress and the switch of current stress.This four-quadrant power switch S XpOr S XsAnd buffer circuit and drive circuit constitute four-quadrant power switch module G jointly XpOr G XsEach Power Conversion unit CB x, by the elementary four-quadrant power switch module G that connects successively Xp, high frequency energy storage transformer T xWith secondary four-quadrant power switch module G XsConstitute, and scattered power circuit is carried out conversion based on the operation principle of anti exciting converter.Each multi-module combined converter 2 is by the input bleeder circuit DB, a plurality of prime power converter unit CB that connect successively xConstitute with output filter circuit OFB, choose different input bleeder circuit DB according to the application scenario input voltage dividing potential drop is suitable prime power converter unit CB xVoltage or input current split into and be fit to prime power converter unit CB xElectric current, each prime power converter unit CB 1～CB NPower switch open constantly the phase place 2 π/N that lags behind successively, its output dither electric current is exported high pressure or low pressure sinusoidal ac after suitable output filter circuit OFB filtering.
The multimode combination A-A transducer that the present invention is based on anti exciting converter adopts the pwm chopper control mode.The present invention is based on the input-series and output-parallel A-A transducer of anti exciting converter, when low-voltage alternating current power supply during to load transfer power, bleeder circuit in the multi-module combined converter splits into N part with filtered input current and voltage is identical, each prime power converter unit is worked with single four-quadrant switches anti exciting converter principle, dither electric current after outlet side obtains modulating, each prime power converter unit outlet side series connection obtains stable or adjustable same frequency through output filter circuit filtering, simple alternating current output voltage, its output voltage values are each prime power converter unit output voltage sums.The present invention is based on the input series and output parallel A-A transducer of anti exciting converter, when high-voltage ac power during to load transfer power, bleeder circuit in the multi-module combined converter is N part and electric current is identical with filtered input high voltage dividing potential drop, handle respectively by N prime power converter unit, each prime power converter unit is worked with single four-quadrant switches anti exciting converter principle, dither electric current after outlet side obtains modulating, each prime power converter unit outlet side parallel connection obtains stable or adjustable same frequency through output filter circuit filtering, simple alternating current output voltage, its output current value are each prime power converter unit output current sums.The present invention is based on the input series connection output series connection A-A transducer of anti exciting converter, when high-voltage ac power during to load transfer power, bleeder circuit in the multi-module combined converter is N part and electric current is identical with filtered input high voltage dividing potential drop, handle respectively by N prime power converter unit, each prime power converter unit is worked with single four-quadrant switches anti exciting converter principle, dither electric current after outlet side obtains modulating, each prime power converter unit outlet side series connection obtains stable or adjustable same frequency through output filter circuit filtering, simple alternating current output voltage, its output voltage values are each prime power converter unit output voltage sums.Each prime power converter unit works alone, but staggers successively the switching time of the power switch of each Power Conversion unit, thereby increases converter input and output side voltage or current ripples frequency, reduces the filter volume and weight.According to input filter circuit output voltage and each prime power converter unit output current direction, its power switch has four kinds of mode of operations, each prime power converter unit has only a power switch high frequency chopping under every kind of mode of operation, other power switch normal opens or end.By controlling the duty ratio that is in the power switch of HF switch operating state in each prime power converter unit, realize the adjusting of output voltage and all pressures current-sharing of each prime power converter unit.
The concrete operation principle of circuit of the present invention and the working method of power switch will be introduced below.
Narrate the concrete operation principle of three kinds of topological structures of the present invention below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5.
The multimode combination A-A transducer that the present invention is based on anti exciting converter adopts the pwm chopper control mode.Shown in Figure 2 is the input-series and output-parallel A-A transducer that the present invention is based on anti exciting converter, as low-voltage alternating current power supply u iTo load Z LDuring transmitted power, the bleeder circuit DB in the multi-module combined converter 2 is with filtered input current i DBiSplit into each prime power converter unit CB 1～CB NThe input side current i L11～i LN1, i.e. i DBi=i L11+ ... + i LN1, and each prime power converter unit CB 1～CB NInput side voltage u CB1i～u CBNiWith input filter capacitor voltage u CiEquate, i.e. u CB1i=...=u CBNi=u Ci, each prime power converter unit CB 1～CB NWith single four-quadrant switches anti exciting converter principle work, the dither outlet side current i after its outlet side obtains modulating L12～i LN2, each prime power converter unit CB 1～CB NThe outlet side series connection obtains stable or adjustable same frequency, simple alternating current output voltage u through output filter circuit OFB filtering o, its value is each prime power converter unit CB 1～CB NOutlet side voltage u CB1o～u CBNoSum, i.e. u o= CB1o+ ... + u CBNoThe present invention is based on the input series and output parallel A-A transducer of anti exciting converter, as high-voltage ac power u iTo load Z LDuring transmitted power, the bleeder circuit DB in the multi-module combined converter 2 is with filtered high-voltage value filter capacitor voltage u CiDividing potential drop is each prime power converter unit CB 1～CB NInput side voltage u CB1i～u CBNi, i.e. u Ci=u CB1i+ ... + u CBNi, and each prime power converter unit CB 1～CB NThe input side current i L11～i LN1With input current i DBiEquate, i.e. i L11=...=i LN1=i DBi, by N prime power converter unit CB 1～CB NHandle each prime power converter unit CB respectively 1～CB NWith single four-quadrant switches anti exciting converter principle work, the dither current i after outlet side obtains modulating L12～i LN2, each prime power converter unit CB 1～CB NThe outlet side parallel connection obtains stable or adjustable same frequency, simple alternating current output voltage u through output filter circuit OFB filtering o, its output current value i oBe each prime power converter unit CB 1～CB NOutlet side electric current sum, i.e. i o=i L12+ ... + i LN2The present invention is based on the input series connection output series connection A-A transducer of anti exciting converter, as high-voltage ac power u iTo load Z LDuring transmitted power, the bleeder circuit DB in the multi-module combined converter 2 is with filtered high-voltage value filter capacitor voltage u CiDividing potential drop is each prime power converter unit CB 1～CB NInput side voltage u CB1i～u CBNi, i.e. u Ci=u CB1i+ ... + u CBNi, by N prime power converter unit CB 1～CB NHandle each prime power converter unit CB respectively 1～CB NWith single four-quadrant switches anti exciting converter principle work, the dither current i after outlet side obtains modulating L12～i LN2, each prime power converter unit CB 1～CB NThe outlet side series connection obtains stable or adjustable same frequency, simple alternating current output voltage u through output filter circuit OFB filtering o, its output voltage values is each prime power converter unit CB 1～CB NOutlet side voltage u CB1o～u CBNoSum, i.e. u o= CB1o+ ... + u CBNoEach prime power converter unit CB 1～CB NRelatively independent work is according to output voltage u oAnd current i oIts power switch of direction has four kinds of mode of operations, but every kind of each prime power converter unit CB of mode of operation 1～CB NHave only a power switch high frequency chopping, other power switchs are often opened or are normally closed.
According to input filter circuit 1 output voltage u CiOutput current i with each prime power converter unit Lx2Direction, circuit can be operated in four kinds of different Mode As, B, C, D, wherein Mode B and D are energy feedback patterns.
A) Mode A
As input filter circuit 1 output voltage u CiOutput current i greater than zero and each prime power converter unit Lx2Greater than zero the time, multimode combination A-A transducer works in Mode A.Fig. 5 (a) is the schematic diagram of mode of operation A that the present invention is based on the multimode combination A-A transducer of anti exciting converter, this moment power switch S 1pa～S NpaHigh frequency chopping, power switch S 1sa～S Nsa, power switch S 1pb～S NpbNormal open, power switch S 1sb～S NsbEnd.Each prime power converter unit CB 1～CB NRelatively independent work, each prime power converter unit equivalence is an isolated DC anti exciting converter.By changing power switch S 1pa～S NpaDuty ratio, realize to regulate output voltage u oWith prime power converter unit CB 1～CB NThe current-sharing of all pressures.
B) pattern
As input filter circuit 1 output voltage u CiOutput current i greater than zero and each prime power converter unit Lx2Less than zero the time, multimode combination A-A transducer works in Mode B.Fig. 5 (b) is the schematic diagram of mode of operation B that the present invention is based on the multimode combination A-A transducer of anti exciting converter, this moment power switch S 1sb～S NsbHigh frequency chopping, power switch S 1sa～S Nsa, power switch S 1pb～S NpbNormal open, power switch S 1pa～S NpaEnd.Each prime power converter unit CB 1～CB NRelatively independent work, each prime power converter unit equivalence is an isolated DC anti exciting converter.By changing power switch S 1sb～S NsbDuty ratio, realize to regulate output voltage u oWith prime power converter unit CB 1～CB NThe current-sharing of all pressures.
C) pattern
As input filter circuit 1 output voltage u CiOutput current i less than zero and each prime power converter unit Lx2Less than zero the time, multimode combination A-A transducer works in pattern C.Fig. 5 (c) is the schematic diagram of mode of operation C that the present invention is based on the multimode combination A-A transducer of anti exciting converter, this moment power switch S 1pb～S NpbHigh frequency chopping, power switch S 1sb～S Nsb, power switch S 1pa～S NpaNormal open, power switch S 1sa～S NsaEnd.Each prime power converter unit CB 1～CB NRelatively independent work, each prime power converter unit equivalence is an isolated DC anti exciting converter.By changing power switch S 1pb～S NpbDuty ratio, realize to regulate output voltage u oWith prime power converter unit CB 1～CB NThe current-sharing of all pressures.
D) pattern
As input filter circuit 1 output voltage u CiOutput current i less than zero and each prime power converter unit Lx2Greater than zero the time, multimode combination A-A transducer works in pattern D.Fig. 5 (d) is the schematic diagram of mode of operation D that the present invention is based on the multimode combination A-A transducer of anti exciting converter, this moment power switch S 1sa～S NsaHigh frequency chopping, power switch S 1pa～S Npa, power switch S 1sb～S NsbNormal open, power switch S 1pb～S NpbEnd.Each prime power converter unit CB 1～CB NRelatively independent work, each prime power converter unit equivalence is an isolated DC anti exciting converter.By changing power switch S 1sa～S NsaDuty ratio, realize to regulate output voltage u oWith prime power converter unit CB 1～CB NThe current-sharing of all pressures.
The emulation experiment effect
Below in conjunction with emulation experiment waveform explanation patent effect.Emulation is used has two prime power converter unit CB 1, CB 2Converter, and transformer T 1And T 2The turn ratio is 1, and makes prime power converter unit CB 1, CB 2Work in the inductive current intermittent operation.
The output voltage u of the input filter circuit 1 when Fig. 6 (a) is the input side tandem compound CiWaveform, dividing potential drop capacitance voltage u Cd1Waveform (is prime power converter unit CB 1Input voltage waveform).The emulation input voltage is a 220V power frequency sinusoidal ac.Among the figure, dividing potential drop capacitance voltage u Cd1The output voltage u of input filter circuit 1 always CiHalf, i.e. u Ci/ N.
Output voltage u when Fig. 6 (b) is the outlet side tandem compound oWaveform, filter capacitor voltage u Cf1Waveform (is prime power converter unit CB 1Output voltage waveforms).During emulation, output voltage is designed to 220V power frequency sinusoidal ac.Among the figure, filter capacitor voltage u Cf1Output voltage u always oHalf, i.e. u o/ N.
Output voltage u when Fig. 6 (c) is outlet side parallel connection combination oWaveform (is prime power converter unit CB 1And CB 2Output voltage waveforms).During emulation, output voltage is designed to 110V power frequency sinusoidal ac.
Fig. 6 (d) is prime power converter unit CB 1Power switch S 1paOn voltage u S1paWaveform.During emulation, with prime power converter unit CB 1Input voltage u Cd1With output voltage u Cf1Be designed to 110V power frequency sinusoidal ac.u S1paMaximum be prime power converter unit CB 1Input voltage u Cd1With output voltage u Cf1Sum.
Fig. 6 (e) is prime power converter unit CB 1And CB 2Primary inductive current i L11And i L21The waveform expanded view.During emulation, with prime power converter unit CB 1Input voltage u Cd1With output voltage u Cf1Be designed to 110V power frequency sinusoidal ac, and work in the inductive current on-off state.Among the figure, inductive current i L11And i L21Frequency equate that phase difference is π (i.e. 2 π/N).
Simulation waveform by Fig. 6 can be reached a conclusion: (1) can guarantee at control circuit under the situation of all pressing current-sharing of each prime power converter unit, each Power Conversion unit CB 1～CB NOperating state identical, the suitable prime power converter unit that adopts unified design.(2) prime power converter unit CB xVoltage stress of power switches and this unit input voltage u Cdx, output voltage u CfxRelevant, and with input voltage u Ci, output voltage u CoNo direct relation.Can reduce prime power converter unit CB by tandem compound xInput voltage u CdxOr output voltage u CfxReduce voltage stress of power switches.And a side of combination in parallel can input or output big electric current.(3) each Power Conversion unit CB 1～CB NThe current phase 2 π/N that lags behind successively, make N that input current and output current ripple frequency rise to switching frequency doubly.

Claims (5)

1. the multimode combination A-A transducer based on anti exciting converter comprises input ac power (u i), input filter circuit (1), this input filter circuit (1) comprises input filter inductance (L i) and input filter capacitor (C i), it is characterized in that: by the input ac power (u that connects successively i), input filter circuit (1), multi-module combined converter (2) and output AC load (Z L) constitute, this converter is transformed into stable or adjustable same frequency high pressure or low pressure sinusoidal ac with high pressure or low-voltage AC, and minimizing Power Conversion progression, realize high frequency electrical isolation, be applicable to high pressure or big electric current ac-ac conversion occasion, promptly this input filter circuit (1) is to input high pressure or low-voltage alternating current power supply (u i) filtering, described multi-module combined converter (2) will be transformed to stable or adjustable same frequency high pressure or low pressure sinusoidal ac, this multi-module combined converter (2) output and load (Z through the filtered input voltage of input filter circuit (1) L) link to each other, this multi-module combined converter (2) comprises a plurality of prime power converter unit (CB 1～CB N), an input bleeder circuit (DB) and an output filter circuit (OFB), this prime power converter unit (CBx) comprises two four-quadrant power switch module (G Xp, G Xs) and a high frequency energy storage transformer (T who is connected between the two x), this four-quadrant power switch module (G Xp, G Xs) comprise four-quadrant power switch (S Xp, S Xs) and buffer circuit and drive circuit, this high frequency energy storage transformer (T x) comprise the elementary winding (N of coupling X1) and secondary winding (N X2); Each prime power converter unit (CB in this multi-module combined converter (2) 1～CB N) power switch open constantly the phase place 2 π/N that lags behind successively, increased the current ripples frequency before the output filter capacitor, through filter circuit (OFB) filtering, thereby at load (Z L) on obtain sinusoidal voltage (u o), wherein N is the integer greater than 1, and x is for more than or equal to 1 and be less than or equal to the integer of N, and P refers to the converter input side, s converter outlet side.
2. the multimode combination A-A transducer based on anti exciting converter according to claim 1, it is characterized in that: this converter is applicable to input-series and output-parallel (IPOS) the combinational circuit topology of high frequency electrical isolation, the big electric current of low input and high output voltage ac-ac conversion occasion, promptly imports low-voltage alternating current power supply (u i) an end and input filter inductance (L i) end connection, this input filter inductance (L i) the other end and input filter capacitor (C i) an end connect both joint lead-out wires and all high frequency transformer (T 1～T N) elementary winding (N 11～N N1) an end connect; This first high frequency transformer (T 1) elementary winding (N 11) the other end and the elementary first four-quadrant power switch (S 1p) an end connect ..., this N high frequency transformer (T N) elementary winding (N N1) the other end and elementary N four-quadrant power switch (S Np) an end connect; This input filter capacitor (C i) the other end and all elementary four-quadrant power switch (S 1p～S Np) the other end connect this input filter capacitor (C i) the other end and all elementary four-quadrant power switch (S 1p～S Np) other end joint lead-out wire and low-voltage alternating current power supply (u i) the other end connect; Described input filter inductance (L i) and input filter capacitor (C i) formation input filter circuit (1); This first high frequency transformer (T 1) secondary winding (N 12) an end and the first output filter capacitor (C F1) an end connect both joint lead-out wires and load (Z L) an end connect; This first high frequency transformer (T 1) secondary winding (N 12) the other end and the secondary first four-quadrant power switch (S 1s) an end connect; This secondary first four-quadrant power switch (S 1s) the other end and the first output filter capacitor (C F1) the other end connect both the joint lead-out wires and the second high frequency transformer (T 2) secondary winding (N 22) an end and the second output filter capacitor (C F2) an end connect; This i high frequency transformer (T i) secondary winding (N I2) the other end and secondary i four-quadrant power switch (S Is) an end connect; This secondary i four-quadrant power switch (S Is) the other end and i output filter capacitor (C Fi) the other end connect both joint lead-out wires and i+1 high frequency transformer (T (i+1)) secondary winding (N (i+1) 2) an end and i+1 output filter capacitor (C F (i+1)) an end connect; This N-1 high frequency transformer (T (N-1)) secondary winding (N (N-1) 2) the other end and secondary N-1 four-quadrant power switch (S (N-1) s) an end connect; This secondary N-1 four-quadrant power switch (S (N-1) s) the other end and N-1 output filter capacitor (C F (N-1)) the other end connect both joint lead-out wires and N high frequency transformer (T N) secondary winding (N N2) an end and N output filter capacitor (C FN) an end connect; This N high frequency transformer (T N) secondary winding (N N2) the other end and secondary N four-quadrant power switch (S Ns) an end connect; This secondary N four-quadrant power switch (S Ns) the other end and N output filter capacitor (C FN) the other end connect both joint lead-out wires and load (Z L) the other end connect; Described four-quadrant power switch (S Xx) and buffer circuit and drive circuit formation four-quadrant power switch module (G Xx); Described elementary x four-quadrant power switch module (G Xp), x high frequency transformer (T x) and secondary x four-quadrant power switch module (G Xs) formation x prime power converter unit (CB x); Described all output filter capacitor (C F1～C FN) formation output filter circuit (OFB); Described all prime power converter unit (CB 1～CB N) and output filter circuit (OFB) formation input-series and output-parallel (IPOS) multi-module combined converter (2); Described input ac power (u i), input filter circuit (1) and input-series and output-parallel (IPOS) multi-module combined converter (2) constitute input-series and output-parallel (IPOS) combination A-A transducer.
3. the multimode combination A-A transducer based on anti exciting converter according to claim 1, it is characterized in that: this converter is applicable to input series and output parallel (ISOP) circuit topology of the big electric current ac-ac conversion of the high input voltage low output voltage occasion of high frequency electrical isolation, promptly imports high-voltage ac power (u i) an end and input filter inductance (L i) end connection, this input filter inductance (L i) the other end and input filter capacitor (C i) an end connect both the joint lead-out wires and the first high frequency transformer (T 1) elementary winding (N 11) an end and the first input dividing potential drop electric capacity (C D1) an end connect; This first high frequency transformer (T 1) elementary winding (N 11) the other end and the elementary first four-quadrant power switch (S 1p) an end connect this elementary first four-quadrant power switch (S 1p) the other end and the first input dividing potential drop electric capacity (C D1) the other end connect both the joint lead-out wires and the second high frequency transformer (T 2) elementary winding (N 21) an end and the second input dividing potential drop electric capacity (C D2) an end connect; This i high frequency transformer (T i) elementary winding (N I1) the other end and elementary i four-quadrant power switch (S Ip) an end connect this elementary i four-quadrant power switch (S Ip) the other end and i input dividing potential drop electric capacity (C Di) the other end connect both joint lead-out wires and i+1 high frequency transformer (T (i+1)) elementary winding (N (i+1) 1) an end and i+1 input dividing potential drop electric capacity (C D (i+1)) an end connect; This N-1 high frequency transformer (T (N-1)) elementary winding (N (N-1) 1) the other end and elementary N-1 four-quadrant power switch (S (N-1) p) an end connect this elementary N-1 four-quadrant power switch (S (N-1) p) the other end and N-1 input dividing potential drop electric capacity (C D (N-1)) the other end connect both joint lead-out wires and N high frequency transformer (T N) elementary winding (N N1) an end and N input dividing potential drop electric capacity (C DN) an end connect; This N high frequency transformer (T N) elementary winding (N N1) the other end and elementary N four-quadrant power switch (S Np) an end connect this elementary N four-quadrant power switch (S Np) the other end and N input dividing potential drop electric capacity (C DN) the other end connect both joint lead-out wires and input filter capacitor (C i) the other end and input high-voltage ac power (u i) the other end connect; Described input filter inductance (L i) and input filter capacitor (C i) formation input filter circuit (1); Described input dividing potential drop electric capacity (C D1～C DN) constitute and import bleeder circuit (DB); This first high frequency transformer (T 1) secondary winding (N 12) end and the secondary first four-quadrant power switch (S 1s) an end connect; This N high frequency transformer (T N) secondary winding (N N2) end and secondary N four-quadrant power switch (S Ns) an end connect; All secondary four-quadrant power switch (S 1s～S Ns) the other end and output filter capacitor (C f) an end and load (Z L) an end connect; This output filter capacitor (C f) the other end and all high frequency transformer (T 1～T N) secondary winding (N 12～N N2) the other end and load (Z L) the other end connect; Described four-quadrant power switch (S Xx) and buffer circuit and drive circuit formation four-quadrant power switch module (G Xx); Described output filter capacitor (C f) formation output filter circuit (OFB); Described elementary x four-quadrant power switch module (G Xp), x high frequency transformer (T x) and secondary x four-quadrant power switch module (G Xs) formation x prime power converter unit (CB x); Described all prime power converter unit (CB 1～CB N), input bleeder circuit (DB) and output filter circuit (OFB) formation input series and output parallel (ISOP) multi-module combined converter (2); Described input power supply alternating current (u i), input filter circuit (1) and input series and output parallel (ISOP) multi-module combined converter (2) constitute input series and output parallel (ISOP) combination A-A transducer.
4. the multimode combination A-A transducer based on anti exciting converter according to claim 1, it is characterized in that: this converter is applicable to input series connection output series connection (ISOS) circuit topology of the high input voltage high output voltage ac-ac conversion occasion of high frequency electrical isolation, promptly imports high-voltage ac power (u i) an end and input filter inductance (L i) end connection, this input filter inductance (L i) the other end and input filter capacitor (C i) an end connect both the joint lead-out wires and the first high frequency transformer (T 1) elementary winding (N 11) an end and the first input dividing potential drop electric capacity (C D1) an end connect; This first high frequency transformer (T 1) elementary winding (N 11) the other end and the elementary first four-quadrant power switch (S 1p) an end connect this elementary first four-quadrant power switch (S 1p) the other end and the first input dividing potential drop electric capacity (C D1) the other end connect both the joint lead-out wires and the second high frequency transformer (T 2) elementary winding (N 21) an end and the second input dividing potential drop electric capacity (C D2) an end connect; This i high frequency transformer (T i) elementary winding (N I1) the other end and elementary i four-quadrant power switch (S Ip) an end connect this elementary i four-quadrant power switch (S Ip) the other end and i input dividing potential drop electric capacity (C Di) the other end connect both joint lead-out wires and i+1 high frequency transformer (T (i+1)) elementary winding (N (i+1) 1) an end and i+1 input dividing potential drop electric capacity (C D (i+1)) an end connect; This N-1 high frequency transformer (T (N-1)) elementary winding (N (N-1) 1) the other end and elementary N-1 four-quadrant power switch (S (N-1) p) an end connect this elementary N-1 four-quadrant power switch (S (N-1) p) the other end and N-1 input dividing potential drop electric capacity (C D (N-1)) the other end connect both joint lead-out wires and N high frequency transformer (T N) elementary winding (N N1) an end and N input dividing potential drop electric capacity (C DN) an end connect; This N high frequency transformer (T N) elementary winding (N N1) the other end and elementary N four-quadrant power switch (S Np) an end connect this elementary N four-quadrant power switch (S Np) the other end and N input dividing potential drop electric capacity (C DN) the other end connect both joint lead-out wires and input filter capacitor (C i) the other end and input high-voltage ac power (u i) the other end connect; Described input filter inductance (L i) and input filter capacitor (C i) formation input filter circuit (1); Described input dividing potential drop electric capacity (C D1～C DN) constitute and import bleeder circuit (DB); This first high frequency transformer (T 1) secondary winding (N 12) an end and the first output filter capacitor (C F1) an end connect both joint lead-out wires and load (Z L) an end connect; This first high frequency transformer (T 1) secondary winding (N 12) the other end and the secondary first four-quadrant power switch (S 1s) an end connect; This secondary first four-quadrant power switch (S 1s) the other end and the first output filter capacitor (C F1) the other end connect both the joint lead-out wires and the second high frequency transformer (T 2) secondary winding (N 22) an end and the second output filter capacitor (C F2) an end connect; This i high frequency transformer (T i) secondary winding (N I2) the other end and secondary i four-quadrant power switch (S Is) an end connect; This secondary i four-quadrant power switch (S Is) the other end and i output filter capacitor (C Fi) the other end connect both joint lead-out wires and i+1 high frequency transformer (T (i+1)) secondary winding (N (i+1) 2) an end and i+1 output filter capacitor (C F (i+1)) an end connect; This N-1 high frequency transformer (T (N-1)) secondary winding (N (N-1) 2) the other end and secondary N-1 four-quadrant power switch (S (N-1) s) an end connect; This secondary N-1 four-quadrant power switch (S (N-1) s) the other end and N-1 output filter capacitor (C F (N-1)) the other end connect both joint lead-out wires and N high frequency transformer (T N) secondary winding (N N2) an end and N output filter capacitor (C FN) an end connect; This N high frequency transformer (T N) secondary winding (N N2) the other end and secondary N four-quadrant power switch (S Ns) an end connect; This secondary N four-quadrant power switch (S Ns) the other end and N output filter capacitor (C FN) the other end connect both joint lead-out wires and load (Z L) the other end connect; Described four-quadrant power switch (S Xx) and buffer circuit and drive circuit formation four-quadrant power switch module (G Xx); Described elementary x four-quadrant power switch module (G Xp), x high frequency transformer (T x) and secondary x four-quadrant power switch module (G Xs) formation x prime power converter unit (CB x); Described all output filter capacitor (C F1～C FN) formation output filter circuit (OFB); Described all prime power converter unit (CB 1～CB N), output filter circuit (OFB) and input bleeder circuit (DB) constitute input series connection output series connection (ISOS) multi-module combined converter (2); Described input ac power (u i), input filter circuit (1) and input series connection output series connection (ISOS) multi-module combined converter (2) constitute input series connection output series connection (ISOS) combination A-A transducer.
5. according to each described multimode combination A-A transducer of claim 1 to 4, it is characterized in that: four-quadrant power switch (S based on anti exciting converter Xp, S Xs) and buffer circuit and drive circuit constitute four-quadrant power switch module (G jointly Xp, G Xs), each Power Conversion unit (CB x) by the elementary four-quadrant power switch module (G that connects successively Xp), high frequency energy storage transformer (T x) and secondary four-quadrant power switch module (G Xs) constitute, and scattered power circuit is carried out conversion based on the operation principle of single four-quadrant switches Current-Source Mode High Frequency interchange link A-A transducer; Each multi-module combined converter (2) is by the input bleeder circuit (DB), a plurality of prime power converter unit (CB that connect successively 1～CB N) and output filter circuit (OFB) formation, choose different input bleeder circuits (DB) according to the application scenario input voltage dividing potential drop is suitable each prime power converter unit (CB 1～CB N) voltage or input current split into and be fit to each prime power converter unit (CB 1～CB N) electric current, each prime power converter unit (CB 1～CB N) power switch open constantly the phase place 2 π/N that lags behind successively, its output dither electric current is exported high pressure or low pressure sinusoidal ac after suitable output filter circuit (OFB) filtering.
CN2009102324767A 2009-11-27 2009-11-27 Multi-mode combined AC-AC (alternating current-alternating current) converter based on fly-back converter Pending CN102082514A (en)

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Application publication date: 20110601