CN205430087U - Single -phase two -way DC -AC converter of high reliability - Google Patents
Single -phase two -way DC -AC converter of high reliability Download PDFInfo
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- CN205430087U CN205430087U CN201620204428.2U CN201620204428U CN205430087U CN 205430087 U CN205430087 U CN 205430087U CN 201620204428 U CN201620204428 U CN 201620204428U CN 205430087 U CN205430087 U CN 205430087U
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- diode
- switching tube
- negative pole
- positive pole
- inductance
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- 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
Abstract
The utility model relates to a single -phase two -way DC of high reliability the AC converter. This converter work DC being the two buck contravariants of full -bridge during AC contravariant mode, is work at AC there is not bridge PFC circuit structure for two boost types during DC rectification mode. In same circuit topology structure, can realize rectification and contravariant function simultaneously, have the two buck type inverter circuit's of full -bridge reliability and two boost types of low EMI and do not have bridge PFC high power factor and efficient characteristics.
Description
Technical field
The utility model relates to the practical field needing simultaneously to realize inversion and rectification function in transformation of electrical energy；Interactive with AC distribution net for direct-current grid, need high reliability two way convertor to realize the utilization field of direct-current grid varying DC link voltage；For Home Plug formula electric automobile as Mobile energy storage equipment, need to realize becoming direct current from electrical network alternating current through over commutation PFC by two-way charger and supply electricity to electric motor car charging, simultaneously when needing the electricity of electric automobile is fed back to electrical network, the use field becoming alternating current to be connected to the grid the DC inverter of electric motor car for realizing battery to need with electrical network interaction field；And for realizing battery and electrical network interaction field；It is specifically related to the single phase bidirectional DC-AC converter of a kind of high reliability.
Background technology
Direct-current grid is connected with low-voltage alternating-current power distribution network by DC-AC two way convertor, comprises the compositions such as direct current electric loading, generation of electricity by new energy equipment (wind-powered electricity generation, photoelectricity) and energy storage device in direct-current micro-grid.In direct-current grid, a large amount of scattered renewable energy power generation unit and load etc. have obvious stochastic volatility, this kind of fluctuating power especially when short circuit power rush DC bus-bar voltage may be impacted, easily cause running quickly of whole DC micro power grid system to burst, therefore the busbar voltage of direct-current grid controls to become matter of utmost importance.To this end, the primary link that research possesses high efficiency, the application of two-way DC-AC current transformer and the DC bus-bar voltage control of high reliability are direct-current grid.Meanwhile, two-way DC-AC current transformer carries out peak load regulation network for extensive electric automobile and fills out paddy, improves in electric load utilization, can realize electric automobile and charge when electrical network low ebb (electricity price is relatively low), discharges when electrical network peak value, it is achieved the saving of electric cost.
Summary of the invention
The purpose of this utility model is to provide the single phase bidirectional DC-AC converter of a kind of high reliability, it is possible to realize inversion DC-AC conversion in same circuit and rectification AC-DC converts；Realize efficient, high reliability feature during inversion, during rectification, realize efficient, High Power Factor.
For achieving the above object, the technical solution of the utility model is: the single phase bidirectional DC-AC converter of a kind of high reliability, including DC voltage Vd, electrical network Vg, electric capacity Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L1, L2；nullThe positive pole of DC voltage Vd and one end of electric capacity Cd、The negative pole of diode D1、The negative pole of diode D2、The positive pole of diode D3、The positive pole of diode D4 connects，The negative pole of DC voltage Vd and the other end of electric capacity Cd、The source electrode of switching tube S1、The positive pole of diode D5、The positive pole of diode D6、The source electrode of switching tube S2 connects，The positive pole of described diode D1 is connected with the drain electrode of switching tube S1，And through the negative pole of inductance L1 Yu diode D5、The source electrode of switching tube S3、The positive pole of electrical network Vg connects，The positive pole of described diode D2 is connected with the drain electrode of switching tube S2，And through the negative pole of inductance L2 Yu diode D6、The source electrode of switching tube S4、The negative pole of electrical network Vg connects，The negative pole of described diode D3 is connected with the drain electrode of switching tube S3，The negative pole of described diode D4 is connected with the drain electrode of switching tube S4，Described switching tube S1、S2、S3、The grid connection control signal of S4.
Compared to prior art, the utility model has the advantages that the utility model improves the reliability of two-way DC-AC current transformer, it is achieved efficient rectification PFC function；Compared with prior art, the utility model is in inversion link, without bridge arm direct pass problem, it is not necessary to dead area compensation, without body diode afterflow etc., possesses higher inversion efficiency and higher reliability；In rectification link, it is not necessary to rectifier bridge structure, can effectively suppress double problem serious for the Boost PFC big EMI of rectifier structure common mode current simultaneously.
Accompanying drawing explanation
Fig. 1 two-stage bidirectional deflector structure.
The high reliability two-way DC-AC translation circuit that Fig. 2 the utility model is proposed.
Fig. 3 prior art bridge-type two-way DC-AC translation circuit.
Fig. 4 is Fig. 2 two-way DC-AC converter, is operated in control block diagram during inverter mode.
First operation mode schematic diagram when Fig. 5 is the DC-AC conversion of Fig. 2.
Second operation mode schematic diagram when Fig. 6 is the DC-AC conversion of Fig. 2.
3rd operation mode schematic diagram when Fig. 7 is the DC-AC conversion of Fig. 2.
4th operation mode schematic diagram when Fig. 8 is the DC-AC conversion of Fig. 2.
Fig. 9 is Fig. 2 two-way DC-AC converter, is operated in control block diagram during rectification mode.
First operation mode schematic diagram when Figure 10 is the AC-DC conversion of Fig. 2.
Second operation mode schematic diagram when Figure 11 is the AC-DC conversion of Fig. 2.
3rd operation mode schematic diagram when Figure 12 is the AC-DC conversion of Fig. 2.
4th operation mode schematic diagram when Figure 13 is the AC-DC conversion of Fig. 2.
Figure 14 is operated in work wave during inverter mode by the converter proposed.
Figure 15 is gone out work wave when converter is operated in rectification mode by carry.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the technical solution of the utility model is specifically described.
Existing DC energy storage device with electrical network interaction two-stage bidirectional converter structure as it is shown in figure 1, monodial dilatation is realized stepping functions by structure 1 bi-directional DC-DC and the two-way DC-AC of structure 2 realizes rectification and inversion merit combines.The utility model is as in figure 2 it is shown, improve the reliability of two-way DC-AC current transformer, it is achieved efficient rectification PFC function.Compared with prior art, the utility model has: DC-AC converter (as shown in Figure 3) two-way with prior art bridge-type, and the utility model is in inversion link, problem without bridge arm direct pass, without dead area compensation, without body diode afterflow etc., possess higher inversion efficiency and higher reliability；In rectification link, it is not necessary to rectifier bridge structure, can effectively suppress double problem serious for the Boost PFC big EMI of rectifier structure common mode current simultaneously.
As in figure 2 it is shown, the single phase bidirectional DC-AC converter of a kind of high reliability of the present utility model, including DC voltage Vd, electrical network Vg, electric capacity Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L1, L2；nullThe positive pole of DC voltage Vd and one end of electric capacity Cd、The negative pole of diode D1、The negative pole of diode D2、The positive pole of diode D3、The positive pole of diode D4 connects，The negative pole of DC voltage Vd and the other end of electric capacity Cd、The source electrode of switching tube S1、The positive pole of diode D5、The positive pole of diode D6、The source electrode of switching tube S2 connects，The positive pole of described diode D1 is connected with the drain electrode of switching tube S1，And through the negative pole of inductance L1 Yu diode D5、The source electrode of switching tube S3、The positive pole of electrical network Vg connects，The positive pole of described diode D2 is connected with the drain electrode of switching tube S2，And through the negative pole of inductance L2 Yu diode D6、The source electrode of switching tube S4、The negative pole of electrical network Vg connects，The negative pole of described diode D3 is connected with the drain electrode of switching tube S3，The negative pole of described diode D4 is connected with the drain electrode of switching tube S4，Described switching tube S1、S2、S3、The grid connection control signal of S4.
For preferably telling about the technical solution of the utility model, the most specifically tell about.
The utility model specific works mode is as shown in Fig. 4-13.When being operated in inversion DC-AC pattern, as shown in Figure 4, Fig. 5-8 show operation mode during inversion to its controller architecture block diagram.During inversion, diode D5, D6 are not involved in work.Being the 1-2 of DC-AC operation mode when grid-connected voltage is positive half cycle inversion, be the 3-4 of DC-AC operation mode when grid-connected voltage is negative half period inversion, during inversion, switching tube work wave is as shown in figure 14.
DC-AC operation mode 1: switching tube S1, S4 disconnect, diode D1, D2, D4 end, and switching tube S2, S3 turn on, and DC voltage Vd forms loop by electrical network Vg and inductance L2, Vd fill energy to inductance L2.
DC-AC operation mode 2: switching tube S1, S2, S4 disconnection, diode D1, D4, D6 cut-off, switching tube S3 turns on, and the energy that inductance L2 is saved as forms Buck continuous current circuit through D2, D3 and S3 with electrical network, and inductance L2 releases energy.
DC-AC operation mode 3: switching tube S1, S4 turn on, diode D1, D2, D3 end, and switching tube S2, S3 disconnect, and stream voltage Vd forms loop by electrical network Vg and inductance L1, Vd fill energy to inductance L1.
DC-AC operation mode 4: switching tube S1, S2, S3 disconnection, diode D2, D3 cut-off, switching tube S4 turns on, and the energy that inductance L1 is saved as forms Buck type continuous current circuit through D1, D4 and S4 with electrical network, and inductance L1 releases energy.
Its controller architecture block diagram when being operated in inversion AC-DC pattern is as it is shown in figure 9, operation mode when Figure 10-13 show rectification.During rectification, diode D3, D4 and switching tube S3, S4 is not involved in work.Being the 1-2 of AC-DC operation mode when rectification line voltage is positive half cycle, be the 3-4 of AC-DC operation mode when line voltage is negative half period rectification, during inversion, switching tube work wave is as shown in figure 15.
AC-DC operation mode 1: switching tube S1 closes, switching tube S2 disconnects, and diode D5 ends, and diode D6 turns on, and electrical network Vg forms tank circuit by S1 and D6 and inductance L1, electrical network fill energy to inductance L1.
AC-DC operation mode 2: switching tube S1 disconnects, switching tube S2 disconnects, and diode D5 ends, and diode D1, D6 turn on, and electrical network Vg and inductance L1 fills to Vd jointly can, it is achieved Boost type converts, and inductance L1 releases energy.
AC-DC operation mode 3: switching tube S1 disconnects, switching tube S1 closes, and diode D5 turns on, and diode D6 ends, and electrical network Vg forms tank circuit by S2 and D5 and inductance L2, electrical network fill energy to inductance L2.
AC-DC operation mode 4: switching tube S1 disconnects, switching tube S2 disconnects, and diode D5, D2 turn on, and diode D6 ends, and electrical network Vg and inductance L2 fills to Vd jointly can, it is achieved Boost type converts, and inductance L2 releases energy.
It is above preferred embodiment of the present utility model, all changes made according to technical solutions of the utility model, when produced function is without departing from the scope of technical solutions of the utility model, belong to protection domain of the present utility model.
Claims (1)
1. the single phase bidirectional DC-AC converter of a high reliability, it is characterised in that: include DC voltage Vd, electrical network Vg, electric capacity Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L1, L2；nullThe positive pole of DC voltage Vd and one end of electric capacity Cd、The negative pole of diode D1、The negative pole of diode D2、The positive pole of diode D3、The positive pole of diode D4 connects，The negative pole of DC voltage Vd and the other end of electric capacity Cd、The source electrode of switching tube S1、The positive pole of diode D5、The positive pole of diode D6、The source electrode of switching tube S2 connects，The positive pole of described diode D1 is connected with the drain electrode of switching tube S1，And through the negative pole of inductance L1 Yu diode D5、The source electrode of switching tube S3、The positive pole of electrical network Vg connects，The positive pole of described diode D2 is connected with the drain electrode of switching tube S2，And through the negative pole of inductance L2 Yu diode D6、The source electrode of switching tube S4、The negative pole of electrical network Vg connects，The negative pole of described diode D3 is connected with the drain electrode of switching tube S3，The negative pole of described diode D4 is connected with the drain electrode of switching tube S4，Described switching tube S1、S2、S3、The grid connection control signal of S4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620204428.2U CN205430087U (en) | 2016-03-17 | 2016-03-17 | Single -phase two -way DC -AC converter of high reliability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620204428.2U CN205430087U (en) | 2016-03-17 | 2016-03-17 | Single -phase two -way DC -AC converter of high reliability |
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| CN205430087U true CN205430087U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620204428.2U Expired - Fee Related CN205430087U (en) | 2016-03-17 | 2016-03-17 | Single -phase two -way DC -AC converter of high reliability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634321A (en) * | 2016-03-17 | 2016-06-01 | 福州大学 | High-reliability single-phase bidirectional DC-AC converter and control method thereof |
| CN107342700A (en) * | 2017-08-18 | 2017-11-10 | 西南石油大学 | A kind of new double step-down combining inverter for eliminating common mode leakage current |
-
2016
- 2016-03-17 CN CN201620204428.2U patent/CN205430087U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634321A (en) * | 2016-03-17 | 2016-06-01 | 福州大学 | High-reliability single-phase bidirectional DC-AC converter and control method thereof |
| CN105634321B (en) * | 2016-03-17 | 2018-04-13 | 福州大学 | The single phase bidirectional DC AC converters and its control method of high reliability |
| CN107342700A (en) * | 2017-08-18 | 2017-11-10 | 西南石油大学 | A kind of new double step-down combining inverter for eliminating common mode leakage current |
| CN107342700B (en) * | 2017-08-18 | 2019-02-01 | 西南石油大学 | A kind of double step-down combining inverter for eliminating common mode leakage current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20190317 |