CN105634321A - High-reliability single-phase bidirectional DC-AC converter and control method thereof - Google Patents
High-reliability single-phase bidirectional DC-AC converter and control method thereof Download PDFInfo
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- CN105634321A CN105634321A CN201610151705.2A CN201610151705A CN105634321A CN 105634321 A CN105634321 A CN 105634321A CN 201610151705 A CN201610151705 A CN 201610151705A CN 105634321 A CN105634321 A CN 105634321A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
-
- 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 invention relates to a high-reliability single-phase bidirectional DC-AC converter and a control method thereof. The converter is in full-bridge dual-Buck inversion when working in a DC-AC inversion mode and is in dual-Boost bridgeless power factor correction (PFC) circuit structure when working in an AC-DC rectification mode; in the same circuit topological structure, the functions of rectification and inversion can be simultaneously achieved, the single-phase bidirectional DC-AC converter has reliability of full-bridge dual-Buck inversion circuit and characteristics of high-power coefficient and high efficiency of low electromagnetic interference (EMI) dual-Boost bridgeless PFC.
Description
Technical field
The present invention relates to during electric energy converts and need the practical field simultaneously realizing inversion and rectification function; For direct-current grid with to exchange distribution network interactive, it is necessary to the two-way current transformer of high reliability realizes the utilization field of direct-current grid varying DC link voltage; For family's plug-in electromobile as portable energy storage device, need to realize becoming direct current from grid alternating current through overcommutation PFC by two-way charger to charge to power truck, simultaneously when needing the electricity of electromobile is fed back to electrical network, for the use field realizing store battery and needing with electrical network interaction field to become alternating-current to be connected to the grid the DC inverter of power truck; And for realizing store battery and the interactive field of electrical network; It is specifically related to the single phase bidirectional DC-AC umformer of a kind of high reliability.
Background technology
Direct-current grid is connected with low-voltage alternating-current distribution network by the two-way current transformer of DC-AC, comprises the compositions such as direct current electrical load, generation of electricity by new energy equipment (wind-powered electricity generation, photoelectricity) and energy storage device in direct-current micro-grid. The renewable energy power generation unit of a large amount of dispersion in direct-current grid and load etc. have obvious stochastic volatility, this kind of fluctuating power especially when short circuit power impact DC bus-bar voltage may be impacted, running quickly of whole direct-current grid system is very easily caused to burst, therefore the bus voltage control of direct-current grid becomes matter of utmost importance. For this reason, the primary link that research possesses high-level 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 electromobile and fills out paddy, improves in the utilization of electric power load, it may be achieved electromobile charges when electrical network low ebb (electricity price is lower), discharges when electrical network peak value, it is achieved the saving of electric cost.
Summary of the invention
It is an object of the invention to provide the single phase bidirectional DC-AC umformer of a kind of high reliability and control method thereof, it is possible in same circuit, realize inversion DC-AC conversion convert with rectification AC-DC; Realize efficient, high reliability function during inversion, during rectification, realize efficient, High Power Factor.
For achieving the above object, the technical scheme of the present invention is: the single phase bidirectional DC-AC umformer of a kind of high reliability, comprises volts DS Vd, electrical network Vg, electric capacity Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L 1, L2, the positive pole of volts DS 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 volts DS 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 L 1 with 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 L 2 with 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.
Present invention also offers a kind of control method of single phase bidirectional DC-AC umformer based on high reliability described above, specific implementation process is as follows:
(1) inversion DC-AC pattern:
When grid-connected voltage is positive half cycle inversion,
DC-AC operation mode 1: switching tube S1, S4 disconnect, diode D1, D2, D4 end, switching tube S2, S3 conducting, and volts DS Vd forms loop by electrical network Vg and inductance L 2, and filling to inductance L 2 by Vd can;
DC-AC operation mode 2: switching tube S1, S2, S4 disconnect, diode D1, and D4, D6 end, switching tube S3 conducting, and the energy that inductance L 2 is saved as is through diode D2, D3 and switching tube S3 and electrical network formation Buck continuous current circuit, and inductance L 2 discharges energy;
When grid-connected voltage is for negative half cycle inversion,
DC-AC operation mode 3: switching tube S1, S4 conducting, diode D1, D2, D3 end, and switching tube S2, S3 disconnect, and stream voltage Vd forms loop by electrical network Vg and inductance L 1, and filling to inductance L 1 by Vd can;
DC-AC operation mode 4: switching tube S1, S2, S3 disconnect, and diode D2, D3 end, switching tube S4 conducting, and the energy that inductance L 1 is saved as is through diode D1, D4 and switching tube S4 and electrical network formation Buck type continuous current circuit, and inductance L 1 discharges energy;
(2) inversion AC-DC pattern:
AC-DC operation mode 1: switching tube S1 closes, and switching tube S2 disconnects, and diode D5 ends, diode D6 conducting, and electrical network Vg forms energy storage loop by switching tube S1 and diode D6 and inductance L 1, filling to inductance L 1 by electrical network can;
AC-DC operation mode 2: switching tube S1 disconnects, switching tube S2 disconnects, and diode D5 ends, diode D1, D6 conducting, and electrical network Vg and inductance L 1 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 1 discharges energy;
AC-DC operation mode 3: switching tube S1 disconnects, switching tube S1 closes, diode D5 conducting, and diode D6 ends, and electrical network Vg forms energy storage loop by switching tube S2 and diode D5 and inductance L 2, and filling to inductance L 2 by electrical network can;
AC-DC operation mode 4: switching tube S1 disconnects, switching tube S2 disconnects, diode D5, D2 conducting, and diode D6 ends, and electrical network Vg and inductance L 2 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 2 discharges energy.
Compared to prior art, the present invention has following useful effect: invention increases the reliability of two-way DC-AC current transformer, it is achieved rectification PFC function efficiently; Compared with prior art, the present invention, 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 stronger reliability; In rectification link, it is not necessary to rectification bridge structure, the problem that simultaneously can effectively suppress two BoostPFC big EMI of rectifier structure common mode current serious.
Accompanying drawing explanation
Fig. 1 two-stage bidirectional unsteady flow apparatus structure.
The two-way DC-AC conversion circuit of high reliability that Fig. 2 is proposed by the invention.
The two-way DC-AC of Fig. 3 prior art bridge-type converts circuit.
Fig. 4 is the two-way DC-AC umformer of Fig. 3, control block diagram when being operated in inverter mode.
First operation mode schematic diagram when Fig. 5 is the DC-AC conversion of Fig. 3.
2nd operation mode schematic diagram when Fig. 6 is the DC-AC conversion of Fig. 3.
3rd operation mode schematic diagram when Fig. 7 is the DC-AC conversion of Fig. 3.
4th operation mode schematic diagram when Fig. 8 is the DC-AC conversion of Fig. 3.
Fig. 9 is the two-way DC-AC umformer of Fig. 3, control block diagram when being operated in rectification mode.
First operation mode schematic diagram when Figure 10 is the AC-DC conversion of Fig. 3.
2nd operation mode schematic diagram when Figure 11 is the AC-DC conversion of Fig. 3.
3rd operation mode schematic diagram when Figure 12 is the AC-DC conversion of Fig. 3.
4th operation mode schematic diagram when Figure 13 is the AC-DC conversion of Fig. 3.
Figure 14 is the work wave of the umformer proposed when being operated in inverter mode.
Figure 15 be carry go out work wave when umformer is operated in rectification mode.
Embodiment
Below in conjunction with accompanying drawing, the technical scheme of the present invention is specifically described.
As shown in Figure 1, individual event conversion realizes stepping functions by structure 1 bi-directional DC-DC and the two-way DC-AC of structure 2 realizes rectification and inversion merit combines for existing DC energy storage device and the interactive two-stage bidirectional converter structure of electrical network. The present invention is as shown in Figure 2, it is to increase the reliability of two-way DC-AC current transformer, it is achieved rectification PFC function efficiently. Compared with prior art, the present invention has: DC-AC umformer (as shown in Figure 3) two-way with prior art bridge-type, and the present invention is in inversion link, without bridge arm direct pass problem, without the need to dead area compensation, without body diode afterflow etc., possess higher inversion efficiency and stronger reliability; In rectification link, it is not necessary to rectification bridge structure, the problem that simultaneously can effectively suppress two BoostPFC big EMI of rectifier structure common mode current serious.
As shown in Figure 2, the single phase bidirectional DC-AC umformer of a kind of high reliability of the present invention, comprises volts DS Vd, electrical network Vg, electric capacity Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L 1, L2, the positive pole of volts DS 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 volts DS 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 L 1 with 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 L 2 with 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.
Present invention also offers a kind of control method of single phase bidirectional DC-AC umformer based on high reliability described above, specific implementation process is as follows:
(1) inversion DC-AC pattern:
When grid-connected voltage is positive half cycle inversion,
DC-AC operation mode 1: switching tube S1, S4 disconnect, diode D1, D2, D4 end, switching tube S2, S3 conducting, and volts DS Vd forms loop by electrical network Vg and inductance L 2, and filling to inductance L 2 by Vd can;
DC-AC operation mode 2: switching tube S1, S2, S4 disconnect, diode D1, and D4, D6 end, switching tube S3 conducting, and the energy that inductance L 2 is saved as is through diode D2, D3 and switching tube S3 and electrical network formation Buck continuous current circuit, and inductance L 2 discharges energy;
When grid-connected voltage is for negative half cycle inversion,
DC-AC operation mode 3: switching tube S1, S4 conducting, diode D1, D2, D3 end, and switching tube S2, S3 disconnect, and stream voltage Vd forms loop by electrical network Vg and inductance L 1, and filling to inductance L 1 by Vd can;
DC-AC operation mode 4: switching tube S1, S2, S3 disconnect, and diode D2, D3 end, switching tube S4 conducting, and the energy that inductance L 1 is saved as is through diode D1, D4 and switching tube S4 and electrical network formation Buck type continuous current circuit, and inductance L 1 discharges energy;
(2) inversion AC-DC pattern:
AC-DC operation mode 1: switching tube S1 closes, and switching tube S2 disconnects, and diode D5 ends, diode D6 conducting, and electrical network Vg forms energy storage loop by switching tube S1 and diode D6 and inductance L 1, filling to inductance L 1 by electrical network can;
AC-DC operation mode 2: switching tube S1 disconnects, switching tube S2 disconnects, and diode D5 ends, diode D1, D6 conducting, and electrical network Vg and inductance L 1 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 1 discharges energy;
AC-DC operation mode 3: switching tube S1 disconnects, switching tube S1 closes, diode D5 conducting, and diode D6 ends, and electrical network Vg forms energy storage loop by switching tube S2 and diode D5 and inductance L 2, and filling to inductance L 2 by electrical network can;
AC-DC operation mode 4: switching tube S1 disconnects, switching tube S2 disconnects, diode D5, D2 conducting, and diode D6 ends, and electrical network Vg and inductance L 2 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 2 discharges energy.
For better telling about the technical scheme of the present invention, below specifically tell about.
The concrete mode of operation of the present invention is as shown in Fig. 4-13. When being operated in inversion DC-AC pattern, its controller architecture block diagram is as shown in Figure 4, operation mode when Fig. 5-8 show inversion. During inversion, diode D5, D6 do not participate 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 cycle 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 conducting, volts DS Vd forms loop by electrical network Vg and inductance L 2, fills energy by Vd to inductance L 2.
DC-AC operation mode 2: switching tube S1, S2, S4 disconnect, diode D1, and D4, D6 end, switching tube S3 conducting, and the energy that inductance L 2 is saved as forms Buck continuous current circuit through D2, D3 and S3 and electrical network, and inductance L 2 discharges energy.
DC-AC operation mode 3: switching tube S1, S4 conducting, diode D1, D2, D3 end, and switching tube S2, S3 disconnect, and stream voltage Vd forms loop by electrical network Vg and inductance L 1, fills energy by Vd to inductance L 1.
DC-AC operation mode 4: switching tube S1, S2, S3 disconnect, and diode D2, D3 end, switching tube S4 conducting, and the energy that inductance L 1 is saved as forms Buck type continuous current circuit through D1, D4 and S4 and electrical network, and inductance L 1 discharges energy.
When being operated in inversion AC-DC pattern, its controller architecture block diagram is as shown in Figure 9, operation mode when Figure 10-13 show rectification. During rectification, diode D3, D4 and switching tube S3, S4 does not participate in work. Rectification electrical network voltage is the 1-2 of AC-DC operation mode when being positive half cycle, is the 3-4 of AC-DC operation mode when electrical network voltage is negative half cycle rectification, and during inversion, switching tube work wave is as shown in figure 15.
AC-DC operation mode 1: switching tube S1 closes, and switching tube S2 disconnects, and diode D5 ends, diode D6 conducting, and electrical network Vg forms energy storage loop by S1 and D6 and inductance L 1, fills energy by electrical network to inductance L 1.
AC-DC operation mode 2: switching tube S1 disconnects, switching tube S2 disconnects, and diode D5 ends, diode D1, D6 conducting, and electrical network Vg and inductance L 1 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 1 discharges energy.
AC-DC operation mode 3: switching tube S1 disconnects, switching tube S1 closes, and diode D5 conducting, diode D6 ends, and electrical network Vg forms energy storage loop by S2 and D5 and inductance L 2, fills energy by electrical network to inductance L 2.
AC-DC operation mode 4: switching tube S1 disconnects, switching tube S2 disconnects, diode D5, D2 conducting, and diode D6 ends, and electrical network Vg and inductance L 2 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 2 discharges energy.
Being more than the better embodiment of the present invention, all changes done according to technical solution of the present invention, when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (2)
1. the single phase bidirectional DC-AC umformer of a high reliability, it is characterised in that: comprise volts DS Vd, electrical network Vg, electric capacity Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L 1, L2, the positive pole of volts DS 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 volts DS 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 L 1 with 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 L 2 with 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.
2. the control method based on the single phase bidirectional DC-AC umformer of high reliability described in claim 1, it is characterised in that: specific implementation process is as follows:
(1) inversion DC-AC pattern:
When grid-connected voltage is positive half cycle inversion,
DC-AC operation mode 1: switching tube S1, S4 disconnect, diode D1, D2, D4 end, switching tube S2, S3 conducting, and volts DS Vd forms loop by electrical network Vg and inductance L 2, and filling to inductance L 2 by Vd can;
DC-AC operation mode 2: switching tube S1, S2, S4 disconnect, diode D1, and D4, D6 end, switching tube S3 conducting, and the energy that inductance L 2 is saved as is through diode D2, D3 and switching tube S3 and electrical network formation Buck continuous current circuit, and inductance L 2 discharges energy;
When grid-connected voltage is for negative half cycle inversion,
DC-AC operation mode 3: switching tube S1, S4 conducting, diode D1, D2, D3 end, and switching tube S2, S3 disconnect, and stream voltage Vd forms loop by electrical network Vg and inductance L 1, and filling to inductance L 1 by Vd can;
DC-AC operation mode 4: switching tube S1, S2, S3 disconnect, and diode D2, D3 end, switching tube S4 conducting, and the energy that inductance L 1 is saved as is through diode D1, D4 and switching tube S4 and electrical network formation Buck type continuous current circuit, and inductance L 1 discharges energy;
(2) inversion AC-DC pattern:
AC-DC operation mode 1: switching tube S1 closes, and switching tube S2 disconnects, and diode D5 ends, diode D6 conducting, and electrical network Vg forms energy storage loop by switching tube S1 and diode D6 and inductance L 1, filling to inductance L 1 by electrical network can;
AC-DC operation mode 2: switching tube S1 disconnects, switching tube S2 disconnects, and diode D5 ends, diode D1, D6 conducting, and electrical network Vg and inductance L 1 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 1 discharges energy;
AC-DC operation mode 3: switching tube S1 disconnects, switching tube S1 closes, diode D5 conducting, and diode D6 ends, and electrical network Vg forms energy storage loop by switching tube S2 and diode D5 and inductance L 2, and filling to inductance L 2 by electrical network can;
AC-DC operation mode 4: switching tube S1 disconnects, switching tube S2 disconnects, diode D5, D2 conducting, and diode D6 ends, and electrical network Vg and inductance L 2 are filled to Vd jointly can, it is achieved Boost type converts, and inductance L 2 discharges energy.
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| CN107404251A (en) * | 2017-08-28 | 2017-11-28 | 武汉华中数控股份有限公司 | A kind of two-way inversion module of full-bridge |
| CN107707146A (en) * | 2017-10-23 | 2018-02-16 | 王为睿 | The double Buck combining inverters of bidirectional power flow LCL type and its control method |
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| GB2451910A (en) * | 2007-08-17 | 2009-02-18 | Pwm Drives Ltd | Bidirectional DC AC converter with multiple buck boost converters and magnetic energy storage device. |
| CN101183836A (en) * | 2007-11-16 | 2008-05-21 | 南京航空航天大学 | Dual-boosting energy feedback type PWM rectification circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107404251A (en) * | 2017-08-28 | 2017-11-28 | 武汉华中数控股份有限公司 | A kind of two-way inversion module of full-bridge |
| CN107404251B (en) * | 2017-08-28 | 2019-10-15 | 武汉华中数控股份有限公司 | A kind of two-way inverter module of full-bridge |
| CN107707146A (en) * | 2017-10-23 | 2018-02-16 | 王为睿 | The double Buck combining inverters of bidirectional power flow LCL type and its control method |
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| CN105634321B (en) | 2018-04-13 |
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