CN105634321B - The single phase bidirectional DC AC converters and its control method of high reliability - Google Patents
The single phase bidirectional DC AC converters and its control method of high reliability Download PDFInfo
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- CN105634321B CN105634321B CN201610151705.2A CN201610151705A CN105634321B CN 105634321 B CN105634321 B CN 105634321B CN 201610151705 A CN201610151705 A CN 201610151705A CN 105634321 B CN105634321 B CN 105634321B
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- diode
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Classifications
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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 present invention relates to the single phase bidirectional DC AC converters and its control method of a kind of high reliability.It is the double Buck inversions of full-bridge during converter work DC AC inverter modes, is double Boost type non-bridge PFC circuits structures when being operated in AC DC rectification modes.In same circuit topological structure, rectification and inversion function can be achieved at the same time, there are the reliability of the double Buck type inverter circuits of full-bridge and double Boost type non-bridge PFC High Power Factors of low EMI and efficient.
Description
Technical field
The present invention relates to the practical field for needing to realize inversion and rectification function in transformation of electrical energy at the same time；For direct-current grid
With the interaction of AC distribution net, it is necessary to which high reliability bidirectional converter realizes the utilization field of direct-current grid varying DC link voltage；
Passed through for Home Plug formula electric automobile as Mobile energy storage equipment, it is necessary to be realized by two-way charger from power grid alternating current
Over commutation PFC becomes direct current and supplies electricity to electric car charging, while when needing the electricity by electric automobile to feed back to power grid, for reality
Existing storage battery needs the DC inverter of electric car using field into what alternating current was connected to the grid with power grid interaction field；And
For realizing storage battery and power grid interaction field；More particularly to a kind of single phase bidirectional DC-AC converters of high reliability.
Background technology
Direct-current grid is connected by DC-AC bidirectional converters with low-voltage alternating-current power distribution network, comprising straight in direct-current micro-grid
Stream electric loading, new energy equipment（Wind-powered electricity generation, photoelectricity）Formed with energy storage device etc..That largely disperses in direct-current grid can
Renewable source of energy generation unit and load etc. have obvious stochastic volatility, this kind of fluctuating power power rush especially in short circuit
DC bus-bar voltage will likely be caused to impact, easily cause running quickly for whole DC micro power grid system to burst, therefore direct-current grid
Busbar voltage control becomes matter of utmost importance.For this reason, research possess high efficiency, high reliability two-way DC-AC current transformers apply with
DC bus-bar voltage control is the primary link of direct-current grid.Meanwhile two-way DC-AC current transformers are for extensive electric automobile
Peak load regulation network Fill valley is carried out, is improved during electric load uses, it can be achieved that electric automobile is in power grid low ebb（Electricity price is relatively low）When charge,
Discharge in power grid peak value, realize the saving of electric cost.
The content of the invention
It is an object of the invention to provide the single phase bidirectional DC-AC converters and its control method of a kind of high reliability, energy
It is enough that inversion DC-AC conversion and rectification AC-DC conversion are realized in same circuit；Efficient, high reliability feature is realized during inversion,
Efficient, High Power Factor is realized during rectification.
To achieve the above object, the technical scheme is that：A kind of single phase bidirectional DC-AC converters of high reliability,
Including DC voltage Vd, power grid Vg, capacitance Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance
L1、L2；The cathode of DC voltage Vd and one end of capacitance Cd, the anode of diode D1, the anode of diode D2, diode D3
The cathode connection of cathode, diode D4, the anode of DC voltage Vd and the other end of capacitance Cd, the source electrode of switching tube S1, two poles
The source electrode connection of the cathode of pipe D5, the cathode of diode D6, switching tube S2, the cathode of the diode D1 and the leakage of switching tube S1
Pole is connected, and is connected through inductance L1 with the cathode of the anode of diode D5, the source electrode of switching tube S3, power grid Vg, two pole
The cathode of pipe D2 is connected with the drain electrode of switching tube S2, and through inductance L2 and the anode of diode D6, the source electrode of switching tube S4, electricity
The anode connection of Vg is netted, the anode of the diode D3 is connected with the drain electrode of switching tube S3, and the anode of the diode D4 is with opening
Close the drain electrode connection of pipe S4, the grid connection control signal of described switching tube S1, S2, S3, S4.
Present invention also offers a kind of controlling party of the single phase bidirectional DC-AC converters based on high reliability described above
Method, the specific implementation process is as follows：
（1）Inversion DC-AC patterns：
When grid-connected voltage is positive half cycle inversion,
DC-AC operation modes 1：Switching tube S1, S4 disconnection, diode D1, D2, D4 cut-off, switching tube S2, S3 conducting, directly
Galvanic electricity presses Vd to be formed into a loop by power grid Vg and inductance L2, fills energy from Vd to inductance L2；
DC-AC operation modes 2：Switching tube S1, S2, S4 disconnection, diode D1, D4, D6 cut-off, switching tube S3 conductings, electricity
The energy that sense L2 is saved as forms Buck continuous current circuits by diode D2, D3 and switching tube S3 with power grid, and inductance L2 releases energy；
When grid-connected voltage is negative half period inversion,
DC-AC operation modes 3：Switching tube S1, S4 conducting, diode D1, D2, D3 cut-off, switching tube S2, S3 are disconnected, directly
Galvanic electricity presses Vd to be formed into a loop by power grid Vg and inductance L1, fills energy from Vd to inductance L1；
DC-AC operation modes 4：Switching tube S1, S2, S3 disconnection, diode D2, D3 cut-off, switching tube S4 conductings, inductance L1
The energy being saved as forms Buck type continuous current circuits by diode D1, D4 and switching tube S4 with power grid, and inductance L1 releases energy；
（2）Rectification AC-DC patterns：
AC-DC operation modes 1：Switching tube S1 is closed, and switching tube S2 is disconnected, diode D5 cut-offs, diode D6 conductings, electricity
Net Vg and tank circuit is formed by switching tube S1 and diode D6 and inductance L1, fill energy from power grid to inductance L1；
AC-DC operation modes 2：Switching tube S1 is disconnected, and switching tube S2 is disconnected, and diode D5 cut-offs, diode D1, D6 are led
Logical, power grid Vg and inductance L1 fills energy to Vd jointly, realizes that Boost type converts, inductance L1 releases energy；
AC-DC operation modes 3：Switching tube S1 is disconnected, switching tube S2 closures, diode D5 conductings, diode D6 cut-offs, electricity
Net Vg and tank circuit is formed by switching tube S2 and diode D5 and inductance L2, fill energy from power grid to inductance L2；
AC-DC operation modes 4：Switching tube S1 is disconnected, and switching tube S2 is disconnected, and diode D5, D2 conducting, diode D6 is cut
Only, power grid Vg and inductance L2 fills energy to Vd jointly, realizes that Boost type converts, inductance L2 releases energy.
Compared to the prior art, the invention has the advantages that：What the present invention improved two-way DC-AC current transformers can
By property, efficient rectification PFC functions are realized；Compared with prior art, the present invention is in inversion link, no bridge arm direct pass problem, nothing
Dead area compensation, no body diode afterflow etc. are needed, possesses the inversion efficiency of higher and stronger reliability；In rectification link, without
Rectifier bridge structure, while can effectively suppress the problem of big EMI of double Boost PFC rectifier structure common mode currents is serious.
Brief description of the drawings
Fig. 1 two-stage bidirectional deflector structures.
The two-way DC-AC translation circuits of high reliability proposed by the invention Fig. 2.
The two-way DC-AC translation circuits of Fig. 3 prior art bridge-types.
Fig. 4 is the two-way DC-AC converters of Fig. 3, is operated in control block diagram during inverter mode.
First operation mode schematic diagram during the DC-AC conversion that Fig. 5 is Fig. 3.
Second operation mode schematic diagram during the DC-AC conversion that Fig. 6 is Fig. 3.
3rd operation mode schematic diagram during the DC-AC conversion that Fig. 7 is Fig. 3.
4th operation mode schematic diagram during the DC-AC conversion that Fig. 8 is Fig. 3.
Fig. 9 is the two-way DC-AC converters of Fig. 3, is operated in control block diagram during rectification mode.
First operation mode schematic diagram during the AC-DC conversion that Figure 10 is Fig. 3.
Second operation mode schematic diagram during the AC-DC conversion that Figure 11 is Fig. 3.
3rd operation mode schematic diagram during the AC-DC conversion that Figure 12 is Fig. 3.
4th operation mode schematic diagram during the AC-DC conversion that Figure 13 is Fig. 3.
Figure 14 is operated in work wave during inverter mode for the converter that is proposed.
Figure 15 is the work wave gone out when converter is operated in rectification mode that is carried.
Embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
Existing DC energy storage device is with power grid interaction two-stage bidirectional converter structure as shown in Figure 1, monodial dilatation is by structure 1
Bi-directional DC-DC realizes that stepping functions and 2 two-way DC-AC of structure realize that rectification and inversion work(are composed.The present invention is such as Fig. 2 institutes
Show, improve the reliability of two-way DC-AC current transformers, realize efficient rectification PFC functions.Compared with prior art, it is of the invention
Have：With the two-way DC-AC converters of prior art bridge-type（As shown in Figure 3）, it is of the invention to be asked in inversion link, no bridge arm direct pass
Topic, without dead area compensation, no body diode afterflow etc., possesses the inversion efficiency of higher and stronger reliability；In rectification link,
Without rectifier bridge structure, while it can effectively suppress the problem of big EMI of double Boost PFC rectifier structure common mode currents is serious.
As shown in Fig. 2, a kind of single phase bidirectional DC-AC converters of high reliability of the present invention, including DC voltage Vd, electricity
Net Vg, capacitance Cd, diode D1, D2, D3, D4, D5, D6, switching tube S1, S2, S3, S4, inductance L1, L2；DC voltage Vd's
Cathode and one end of capacitance Cd, the anode of diode D1, the anode of diode D2, the cathode of diode D3, diode D4 are just
Pole connects, anode and the other end of capacitance Cd, the source electrode of switching tube S1, cathode, the diode of diode D5 of DC voltage Vd
The source electrode connection of the cathode, switching tube S2 of D6, the cathode of the diode D1 are connected with the drain electrode of switching tube S1, and through inductance
L1 is connected with the cathode of the anode of diode D5, the source electrode of switching tube S3, power grid Vg, the cathode and switching tube of the diode D2
The drain electrode of S2 is connected, and is connected through inductance L2 with the anode of the anode of diode D6, the source electrode of switching tube S4, power grid Vg, institute
The anode for stating diode D3 is connected with the drain electrode of switching tube S3, and the anode of the diode D4 is connected with the drain electrode of switching tube S4,
The grid connection control signal of described switching tube S1, S2, S3, S4.
Present invention also offers a kind of controlling party of the single phase bidirectional DC-AC converters based on high reliability described above
Method, the specific implementation process is as follows：
（1）Inversion DC-AC patterns：
When grid-connected voltage is positive half cycle inversion,
DC-AC operation modes 1：Switching tube S1, S4 disconnection, diode D1, D2, D4 cut-off, switching tube S2, S3 conducting, directly
Galvanic electricity presses Vd to be formed into a loop by power grid Vg and inductance L2, fills energy from Vd to inductance L2；
DC-AC operation modes 2：Switching tube S1, S2, S4 disconnection, diode D1, D4, D6 cut-off, switching tube S3 conductings, electricity
The energy that sense L2 is saved as forms Buck continuous current circuits by diode D2, D3 and switching tube S3 with power grid, and inductance L2 releases energy；
When grid-connected voltage is negative half period inversion,
DC-AC operation modes 3：Switching tube S1, S4 conducting, diode D1, D2, D3 cut-off, switching tube S2, S3 are disconnected, directly
Galvanic electricity presses Vd to be formed into a loop by power grid Vg and inductance L1, fills energy from Vd to inductance L1；
DC-AC operation modes 4：Switching tube S1, S2, S3 disconnection, diode D2, D3 cut-off, switching tube S4 conductings, inductance L1
The energy being saved as forms Buck type continuous current circuits by diode D1, D4 and switching tube S4 with power grid, and inductance L1 releases energy；
（2）Rectification AC-DC patterns：
AC-DC operation modes 1：Switching tube S1 is closed, and switching tube S2 is disconnected, diode D5 cut-offs, diode D6 conductings, electricity
Net Vg and tank circuit is formed by switching tube S1 and diode D6 and inductance L1, fill energy from power grid to inductance L1；
AC-DC operation modes 2：Switching tube S1 is disconnected, and switching tube S2 is disconnected, and diode D5 cut-offs, diode D1, D6 are led
Logical, power grid Vg and inductance L1 fills energy to Vd jointly, realizes that Boost type converts, inductance L1 releases energy；
AC-DC operation modes 3：Switching tube S1 is disconnected, switching tube S2 closures, diode D5 conductings, diode D6 cut-offs, electricity
Net Vg and tank circuit is formed by switching tube S2 and diode D5 and inductance L2, fill energy from power grid to inductance L2；
AC-DC operation modes 4：Switching tube S1 is disconnected, and switching tube S2 is disconnected, and diode D5, D2 conducting, diode D6 is cut
Only, power grid Vg and inductance L2 fills energy to Vd jointly, realizes that Boost type converts, inductance L2 releases energy.
Preferably to tell about technical scheme, specifically told about below.
Specific working mode of the present invention is as shown in Fig. 4-13.Its controller architecture block diagram when being operated in inversion DC-AC patterns
As shown in figure 4, operation mode when Fig. 5-8 show inversion.During inversion, diode D5, D6 are not involved in work.Grid-connected voltage is
It is the 1-2 of DC-AC operation modes during positive half cycle inversion, the 3-4 that it is DC-AC operation modes during negative half period inversion that grid-connected voltage, which is,
Switching tube work wave is as shown in figure 14 during inversion.
DC-AC operation modes 1：Switching tube S1, S4 disconnection, diode D1, D2, D4 cut-off, switching tube S2, S3 conducting, directly
Galvanic electricity presses Vd to be formed into a loop by power grid Vg and inductance L2, fills energy from Vd to inductance L2.
DC-AC operation modes 2：Switching tube S1, S2, S4 disconnection, diode D1, D4, D6 cut-off, switching tube S3 conductings, electricity
The energy that sense L2 is saved as passes through D2, D3 and S3 and forms Buck continuous current circuits with power grid, and inductance L2 releases energy.
DC-AC operation modes 3：Switching tube S1, S4 conducting, diode D1, D2, D3 cut-off, switching tube S2, S3 are disconnected, directly
Galvanic electricity presses Vd to be formed into a loop by power grid Vg and inductance L1, fills energy from Vd to inductance L1.
DC-AC operation modes 4：Switching tube S1, S2, S3 disconnection, diode D2, D3 cut-off, switching tube S4 conductings, inductance L1
The energy being saved as passes through D1, D4 and S4 and forms Buck type continuous current circuits with power grid, and inductance L1 releases energy.
Its controller architecture block diagram when being operated in rectification AC-DC patterns is as shown in figure 9, when Figure 10-13 show rectification
Operation mode.During rectification, diode D3, D4 and switching tube S3, S4 are not involved in work.Rectification network voltage is when being positive half cycle
The 1-2 of AC-DC operation modes, the 3-4 that it is AC-DC operation modes during negative half period rectification that network voltage, which is, when inversion, switch plumber
It is as shown in figure 15 to make waveform.
AC-DC operation modes 1：Switching tube S1 is closed, and switching tube S2 is disconnected, diode D5 cut-offs, diode D6 conductings, electricity
Net Vg and tank circuit is formed by S1 and D6 and inductance L1, fill energy from power grid to inductance L1.
AC-DC operation modes 2：Switching tube S1 is disconnected, and switching tube S2 is disconnected, and diode D5 cut-offs, diode D1, D6 are led
Logical, power grid Vg and inductance L1 fills energy to Vd jointly, realizes that Boost type converts, inductance L1 releases energy.
AC-DC operation modes 3：Switching tube S1 is disconnected, switching tube S2 closures, diode D5 conductings, diode D6 cut-offs, electricity
Net Vg and tank circuit is formed by S2 and D5 and inductance L2, fill energy from power grid to inductance L2.
AC-DC operation modes 4：Switching tube S1 is disconnected, and switching tube S2 is disconnected, and diode D5, D2 conducting, diode D6 is cut
Only, power grid Vg and inductance L2 fills energy to Vd jointly, realizes that Boost type converts, inductance L2 releases energy.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, caused function are made
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (1)
- A kind of 1. control method of the single phase bidirectional DC-AC converters of high reliability, it is characterised in that：One high reliability is provided Single phase bidirectional DC-AC converters, including DC voltage Vd, power grid Vg, capacitance Cd, diode D1, D2, D3, D4, D5, D6, switch Pipe S1, S2, S3, S4, inductance L1, L2；The cathode of DC voltage Vd and one end of capacitance Cd, the anode of diode D1, diode The cathode connection of the anode of D2, the cathode of diode D3, diode D4, the anode of DC voltage Vd and the other end of capacitance Cd, The source electrode connection of the source electrode of switching tube S1, the cathode of diode D5, the cathode of diode D6, switching tube S2, the diode D1 Cathode be connected with the drain electrode of switching tube S1, and through inductance L1 and the anode of diode D5, the source electrode of switching tube S3, power grid Vg Cathode connection, the cathode of the diode D2 is connected with the drain electrode of switching tube S2, and bearing through inductance L2 and diode D6 Pole, the anode connection of the source electrode of switching tube S4, power grid Vg, the anode of the diode D3 are connected with the drain electrode of switching tube S3, institute The anode for stating diode D4 is connected with the drain electrode of switching tube S4, the grid connection control signal of described switching tube S1, S2, S3, S4； This method the specific implementation process is as follows：（1）Inversion DC-AC patterns：When grid-connected voltage is positive half cycle inversion,DC-AC operation modes 1：Switching tube S1, S4 disconnection, diode D1, D2, D4 cut-off, switching tube S2, S3 conducting, direct current Press Vd to be formed into a loop by power grid Vg and inductance L2, fill energy from Vd to inductance L2；DC-AC operation modes 2：Switching tube S1, S2, S4 disconnection, diode D1, D4, D6 cut-off, switching tube S3 conductings, inductance L2 The energy being saved as forms Buck continuous current circuits by diode D2, D3 and switching tube S3 with power grid, and inductance L2 releases energy；When grid-connected voltage is negative half period inversion,DC-AC operation modes 3：Switching tube S1, S4 conducting, diode D1, D2, D3 cut-off, switching tube S2, S3 are disconnected, direct current Press Vd to be formed into a loop by power grid Vg and inductance L1, fill energy from Vd to inductance L1；DC-AC operation modes 4：Switching tube S1, S2, S3 disconnection, diode D2, D3 cut-off, switching tube S4 conductings, inductance L1 are saved as Energy form Buck type continuous current circuits by diode D1, D4 and switching tube S4 and power grid, inductance L1 releases energy；（2）Rectification AC-DC patterns：AC-DC operation modes 1：Switching tube S1 is closed, and switching tube S2 is disconnected, diode D5 cut-offs, diode D6 conductings, power grid Vg Tank circuit is formed by switching tube S1 and diode D6 and inductance L1, fills energy from power grid to inductance L1；AC-DC operation modes 2：Switching tube S1 is disconnected, and switching tube S2 is disconnected, diode D5 cut-offs, diode D1, D6 conducting, electricity Net Vg and inductance L1 fills energy to Vd jointly, realizes that Boost type converts, inductance L1 releases energy；AC-DC operation modes 3：Switching tube S1 is disconnected, switching tube S2 closures, diode D5 conductings, diode D6 cut-offs, power grid Vg Tank circuit is formed by switching tube S2 and diode D5 and inductance L2, fills energy from power grid to inductance L2；AC-DC operation modes 4：Switching tube S1 is disconnected, and switching tube S2 is disconnected, diode D5, D2 conducting, diode D6 cut-offs, electricity Net Vg and inductance L2 fills energy to Vd jointly, realizes that Boost type converts, inductance L2 releases energy.
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| 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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| CN101183836A (en) * | 2007-11-16 | 2008-05-21 | 南京航空航天大学 | Dual-boosting energy feedback type PWM rectification circuit |
| 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. |
| CN103259435A (en) * | 2011-11-21 | 2013-08-21 | 文科泰克(德国)有限责任公司 | Assymetric twin bridge dc/ac inverter capable of reactive power transfer |
| CN105186919A (en) * | 2015-07-24 | 2015-12-23 | 珠海格力电器股份有限公司 | Non-isolated grid-connected converter, air-conditioning system and converter control method |
| CN205430087U (en) * | 2016-03-17 | 2016-08-03 | 福州大学 | Single -phase two -way DC -AC converter of high reliability |
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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 |
| CN103259435A (en) * | 2011-11-21 | 2013-08-21 | 文科泰克(德国)有限责任公司 | Assymetric twin bridge dc/ac inverter capable of reactive power transfer |
| CN105186919A (en) * | 2015-07-24 | 2015-12-23 | 珠海格力电器股份有限公司 | Non-isolated grid-connected converter, air-conditioning system and converter control method |
| CN205430087U (en) * | 2016-03-17 | 2016-08-03 | 福州大学 | Single -phase two -way DC -AC converter of high reliability |
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