CN103888014A - Bidirectional inverter topology - Google Patents
Bidirectional inverter topology Download PDFInfo
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- CN103888014A CN103888014A CN201210592441.6A CN201210592441A CN103888014A CN 103888014 A CN103888014 A CN 103888014A CN 201210592441 A CN201210592441 A CN 201210592441A CN 103888014 A CN103888014 A CN 103888014A
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Abstract
The invention belongs to the field of power converter, and discloses a bidirectional inverter topology. Direct current and alternating current conversion is realized. The bidirectional inverter topology can be widely used in a system needing an alternating current and direct current hybrid power supply, an energy storage system and the like. According to the invention, a chopping switch, an energy storage inductor and an H type commutation rectification bridge are connected in series between positive and negative poles of a direct current end; a boost switch and the energy storage inductor which is connected in series are connected in parallel with the H type commutation bridge circuit; two bridge arm middle points of the H type commutation bridge are connected with an alternating current end; and by adopting a simple topology structure, direct bidirectional flow of direct current and alternating current is realized, and rectification, inversion, frequency conversion, reactive power control and the like are realized.
Description
Technical field
The invention belongs to electric power unsteady flow field, realize direct current and alternating current is changed mutually, can be widely used in needing alternating current-direct current AC-battery power source, energy storage, motor to drive and the system such as braking in.
Background technology
Two-way inverter is called again inversion rectification all-in-one, storage battery inverter, is widely used in new forms of energy energy-storage system, intelligent micro-grid system, new forms of energy charging power station, new forms of energy dynamical system.Its effect is to connect AC system and direct current system, realizes two energy conversion between system, sometimes need to become to exchange, sometimes need to become direct current from exchange conversion from DC converting.For AC system, there is again dividing of single-phase and three-phase.Current powerful two way convertor, the high-power main finger here more than 50KW, is mainly three-phase two way convertor; Low power two way convertor, take single-phase electricity as main.Two way convertor is quite emerging demand, and current product also has the shortcoming such as complex structure, price height, needs the continuous progress of technology to meet industry demand.
Summary of the invention
The present invention proposes a kind of two-way inverter topology, the realization of innovation the direct Bidirectional variable-flow of high efficiency, cheaply direct current and single-phase alternating current, can also realize simultaneously and exchange idle control.
Technical scheme of the present invention (with reference to accompanying drawing) is:
Between DC terminal both positive and negative polarity, be in series with chopping switch (S5 in figure), energy storage inductor (L2 in L1 and Fig. 2 in Fig. 1), H type commutation rectifier bridge (being called for short this H type commutation rectifier bridge is H bridge), have boosted switch (S7 in figure) and the energy storage inductor of connecting and the parallel connection of H type reversing bridge circuit, two brachium pontis mid points of H type reversing bridge with exchange end and be connected; Chopping switch S5 is two-way, or is parallel with backward diode (D5 in figure), or the inner integrated backward diode of switching tube; Boosted switch S7 is two-way, or is parallel with backward diode (D7), or the inner integrated backward diode of switching tube; H bridge has four switching tubes (S1, S2, S3 and S4 in figure), two switching tubes that are connected with direct-flow positive pole side in H bridge are called for S1 and S3, two switching tubes that are connected with direct current negative side in H bridge are S2 and S4, S1 and a brachium pontis of S2 composition, S3 and a brachium pontis of S4 composition; Switching tube S1, S2, S3 and S4 are two-way, or are parallel with backward diode (D1, D2, D3 and D4 in figure), or the inner integrated backward diode of switching tube; Between two brachium pontis mid points of H bridge, connect capacitor C 3, or in the DC side parallel capacitor C 2 of H bridge, capacitor C 2 and capacitor C 3 has one at least, or two have; Chopping switch and energy storage inductor can be positioned at direct current input/output terminal the same side (as shown in Figure 1), also can be positioned at the opposed polarity side of direct current input/output terminal; Two brachium pontis mid points of H bridge connect interchange input/output terminal, certainly in practical application, may also will increase EMC filter circuit, isolating transformer etc.; At direct current input/output terminal shunt capacitance C1.
The invention has the beneficial effects as follows:
Having realized the two-way changing of power with simple topological circuit, can be alternating current DC inverter, also alternating current can be transformed to direct current, more much lower than current similar scheme cost.Topology of the present invention can realize the adjustment of power factor in realizing active power conversion, controls the flow direction of reactive power.Adopt the present invention to realize the four quadrant running of frequency conversion, conveniently realize frequency conversion drive and the braking of motor.
Accompanying drawing explanation
This specification has four accompanying drawings:
Fig. 1, two-way inverter topology schematic diagram one, chopping switch and energy storage inductor are in DC terminal the same side;
Fig. 2, two-way inverter topology schematic diagram two, chopping switch and energy storage inductor are in DC terminal opposed polarity side;
Fig. 3, power flows to the work schematic diagram of AC from DC side;
Fig. 4, power flows to the work schematic diagram of DC side from AC;
Embodiment
Fig. 3, Fig. 4 are the work schematic diagrames that uses two-way inverter topology of the present invention.
Shown in Fig. 3 is power flows to AC operation principle from DC side: at this moment switch S 5 is in high frequency chopping on off state; When S5 is during in opening state, to energy storage inductor L1 charging, S7 and D7 are in off state; When S5 is during in off state, the electric current of energy storage inductor L1 is by D7 or S7 afterflow; H reversing bridge, in power frequency on off state, commutates to the electric current of L1, realizes the reversal that exchanges output; The electric current of energy storage inductor L1 can adopt diode continuousing flow mode, and freewheel current flows through from diode D7, also can adopt synchronous freewheeling mode, and freewheel current is from switch S 7; The mode of diode continuousing flow, afterflow does not need to control, so control strategy is simple, the mode control of synchronous freewheeling is comparatively complicated, it is two-way needing switching tube S7 simultaneously, but reasonably under design, can realize higher efficiency; The voltage magnitude of Duty ratio control AC output of the high frequency chopping by controlling S5 changes; By controlling H bridge, control the polarity that exchanges output.
Shown in Fig. 4 to be power flow to the operation principle of DC side from AC: at this moment boosted switch (S7 Fig. 4) is in high frequency boosted switch state; In the time that S7 opens, energy storage inductor L1 is charged, S5, D5 are in off state, and in the time that S7 turn-offs, the electric current of inductance L 1, by S5 or D5 afterflow, is transmitted electricity to DC side; The electric current afterflow of corresponding inductance L 1 also has two kinds of modes, diode continuousing flow mode and synchronous freewheeling mode, diode continuousing flow mode need to be on S5 fly-wheel diode in parallel, but control fairly simple, the control of synchronous freewheeling mode is more complicated, it is two-way needing switching tube S5 simultaneously, but can realize higher efficiency in the situation that reasonable in design; H bridge uses as rectifier bridge, also has two kinds of modes, synchronous rectification and diode rectification; By controlling output voltage amplitude and the power of HF switch Duty ratio control DC side of boosted switch S7.
The flow direction control of above-mentioned two kinds of power realizes dynamic variation by controlling sequential, thereby realizes the flexible control of power, realizes inversion, rectification, frequency conversion, idle control etc., is widely used in energy storage, Ac/dc Power Systems etc.
Claims (7)
1. two-way inverter topology, realize direct current and alternating current is changed mutually, it is characterized in that being in series with between DC terminal both positive and negative polarity chopping switch, energy storage inductor, H type commutation rectifier bridge, have boosted switch and the energy storage inductor of connecting and the parallel connection of H type reversing bridge circuit, two brachium pontis mid points of H type reversing bridge with exchange end and be connected.
2. two-way inverter topology according to claim 1, is characterized in that described chopping switch is two-way, or is parallel with backward diode, or internal-internal integrated backward diode.
3. two-way inverter topology according to claim 1, is characterized in that described boosted switch S7 is two-way, or is parallel with backward diode, or switching tube inner integrated backward diode.
4. two-way inverter topology according to claim 1, it is characterized in that described H type reversing bridge has four switching tubes (S1, S2, S3 and S4), two switching tubes that are wherein connected with direct-flow positive pole side are called for S1 and S3, two switching tubes that are connected with direct current negative side in H bridge are S2 and S4, S1 and a brachium pontis of S2 composition, S3 and a brachium pontis of S4 composition.
5. according to the two-way inverter topology described in claim 1 and claim 4, it is characterized in that described switching tube S1, S2, S3 and S4 are two-way, or be parallel with backward diode, or switching tube inner integrated backward diode.
6. two-way inverter topology according to claim 1, is characterized in that connecting capacitor C 3 between two brachium pontis mid points of H bridge, or in the DC side parallel capacitor C 2 of H bridge, capacitor C 2 and capacitor C 3 have one at least, or two have.
7. two-way inverter topology according to claim 1, is characterized in that chopping switch and energy storage inductor can be positioned at direct current input/output terminal the same side, also can be positioned at the opposed polarity side of direct current input/output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210592441.6A CN103888014A (en) | 2012-12-21 | 2012-12-21 | Bidirectional inverter topology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210592441.6A CN103888014A (en) | 2012-12-21 | 2012-12-21 | Bidirectional inverter topology |
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| CN103888014A true CN103888014A (en) | 2014-06-25 |
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| CN201210592441.6A Pending CN103888014A (en) | 2012-12-21 | 2012-12-21 | Bidirectional inverter topology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322795A (en) * | 2015-09-18 | 2016-02-10 | 天水电气传动研究所有限责任公司 | High-precision power supply for meeting slow response inductive load and rapid change requirements |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005934A (en) * | 2010-10-21 | 2011-04-06 | 天津大学 | Reconfigurable power inverter for direct drive type permanent-magnet synchronous generating system |
| WO2012043138A1 (en) * | 2010-09-29 | 2012-04-05 | 三洋電機株式会社 | Power source system |
| CN102437814A (en) * | 2010-09-29 | 2012-05-02 | 无锡爱光电气科技有限公司 | Bi-directional back-boost-type inverter device |
| CN102738821A (en) * | 2011-03-29 | 2012-10-17 | 索尼公司 | A grid tied inverter, system and method |
| CN103872940A (en) * | 2012-12-07 | 2014-06-18 | 丰郅(上海)新能源科技有限公司 | Bi-directional converting topology |
-
2012
- 2012-12-21 CN CN201210592441.6A patent/CN103888014A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012043138A1 (en) * | 2010-09-29 | 2012-04-05 | 三洋電機株式会社 | Power source system |
| CN102437814A (en) * | 2010-09-29 | 2012-05-02 | 无锡爱光电气科技有限公司 | Bi-directional back-boost-type inverter device |
| CN102005934A (en) * | 2010-10-21 | 2011-04-06 | 天津大学 | Reconfigurable power inverter for direct drive type permanent-magnet synchronous generating system |
| CN102738821A (en) * | 2011-03-29 | 2012-10-17 | 索尼公司 | A grid tied inverter, system and method |
| CN103872940A (en) * | 2012-12-07 | 2014-06-18 | 丰郅(上海)新能源科技有限公司 | Bi-directional converting topology |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322795A (en) * | 2015-09-18 | 2016-02-10 | 天水电气传动研究所有限责任公司 | High-precision power supply for meeting slow response inductive load and rapid change requirements |
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Address after: 201114, Shanghai, Minhang District, Pujiang, Zhenjiang Road, No. 999, 5 odd floor Park, 1 floor Applicant after: Fengzhi (Shanghai) New Energy Technology Co., Ltd. Address before: 201112 Shanghai city LIANHANG Road No. 1188 Urarie Chise Business Park Building No. 7 room A303 Applicant before: Fengzhi (Shanghai) New Energy Technology Co., Ltd. |
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