CN202094816U - Solar inverter circuit and inverter - Google Patents
Solar inverter circuit and inverter Download PDFInfo
- Publication number
- CN202094816U CN202094816U CN 201120165934 CN201120165934U CN202094816U CN 202094816 U CN202094816 U CN 202094816U CN 201120165934 CN201120165934 CN 201120165934 CN 201120165934 U CN201120165934 U CN 201120165934U CN 202094816 U CN202094816 U CN 202094816U
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- Prior art keywords
- switch
- inverter
- solar energy
- inverter circuit
- brachium pontis
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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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without 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
- H02M7/537—Conversion of dc power input into ac power output without 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without 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, e.g. single switched pulse inverters in a bridge configuration
- H02M7/5388—Conversion of dc power input into ac power output without 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, e.g. single switched pulse inverters in a bridge configuration with asymmetrical configuration of switches
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The utility model discloses a solar inverter circuit and an inverter, wherein the solar inverter circuit comprises an inverter and two filter inductances; the input end of the inverter is connected with a solar cell panel; the output end of the inverter is connected with the filter inductances; the inverter comprises an upper bridge arm and a lower bridge arm; the upper bridge arm comprises a first switch and a second switch; the lower bridge arm comprises a third switch and a fourth switch; and the third switch and the fourth switch are respectively formed by power switching devices connected in parallel. The solar inverter circuit and the inverter can reduce conduction loss and switching loss; moreover, the working efficiency of the inverter can be improved and the system reliability is improved.
Description
Technical field
The utility model relates to the solar energy generation technology field, specially refers to a kind of solar energy inverter circuit and device.
Background technology
Solar inverter is a kind of power supply change-over device, it can be converted to alternating voltage to the direct voltage of solar panel, be used to drive AC load such as household electrical appliance, illumination and motor instrument, the application of solar inverter more and more widely, requirement to its delivery efficiency is also more and more higher, and this will guarantee low conduction loss.The single-phase full bridge inverter circuit generally is made up of device for power switching and ac filter inductance, and upper and lower brachium pontis respectively is distributed with two device for power switching.Adopt this kind topological structure, owing to adopt single device for power switching, be unfavorable for reducing conduction loss, and when device for power switching damages, inverter just can't operate as normal, influences system reliability.
The utility model content
Main purpose of the present utility model can reduce conduction loss and switching loss for a kind of solar energy inverter circuit and device are provided, and can improve the operating efficiency of inverter, improves system reliability.
The utility model provides a kind of solar energy inverter circuit, comprise inverter and two filter inductances, the input of described inverter links to each other with solar panel, output links to each other with filter inductance, inverter comprises brachium pontis and following brachium pontis, the described brachium pontis of going up comprises first switch and second switch, and described brachium pontis down comprises the 3rd switch and the 4th switch, and described the 3rd switch and the 4th switch are made of the device for power switching parallel connection respectively.
Preferably, when first switch and second switch are carried out pulse-width modulation, described the 3rd switch, the 4th switch carry out commutation work by following flow process: at positive half period, when first switch carries out pulse-width modulation, the 4th switch keeping positive half period open operation, second switch and the 3rd switch keep turn-offing at positive half period; At negative half-cycle, when second switch carried out pulse-width modulation, the 3rd switch was held open state, and first switch and the 4th switch turn-off at negative half-cycle.
Preferably, described first switch and described second switch are arranged in parallel, and are the IGBT switching tube.
Preferably, described the 3rd switch and described the 4th switch are for being arranged in parallel.
Preferably, described device for power switching is the switch mosfet pipe.
Preferably, the commutation power frequency of described the 3rd switch and the 4th switch is 50HZ or 60HZ.
The utility model also provides a kind of solar energy inverter, comprise the solar energy inverter circuit, described solar energy inverter circuit comprises inverter and two filter inductances, the input of described inverter links to each other with solar panel, output links to each other with filter inductance, and inverter comprises brachium pontis and following brachium pontis, and the described brachium pontis of going up comprises first switch and second switch, described brachium pontis down comprises the 3rd switch and the 4th switch, and described the 3rd switch and the 4th switch are made of the device for power switching parallel connection respectively.
A kind of solar energy inverter circuit and device that the utility model provides, by realizing the inverter function with the alternative single switching transistor of two switching tubes respectively on the brachium pontis down, reduced the resistance of switching tube, thereby reduce conduction loss and switching loss, and can prevent to cause inverter to work because of single tube damages, improve system reliability.
Description of drawings
Fig. 1 is the circuit diagram of the utility model solar energy inverter circuit and device.
The realization of the utility model purpose, functional characteristics and advantage will be in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
With reference to Fig. 1, one embodiment of the utility model solar energy inverter circuit has been proposed, the solar energy inverter circuit comprises inverter and two filter inductance L1, L2, the input of inverter links to each other with solar panel, output and filter inductance L1, L2 links to each other, inverter comprises brachium pontis and following brachium pontis, last brachium pontis comprises first switch P 1 and second switch P2, following brachium pontis comprises the 3rd switch N1 and the 4th switch N2, the 3rd switch N1 and the 4th switch N2 are made of the device for power switching parallel connection, in the present embodiment, the 3rd switch N1 is made of two switching device S1 and S2 parallel connection, and the 4th switch N2 is made of two switching device S3 and S4 parallel connection.
Inverter links to each other with solar panel, can be with the direct current that solar panel sent, after first switch P 1 of brachium pontis and second switch P2 carry out pulse-width modulation on to inverter, output AC, drive AC load such as household electrical appliance, illumination and motor instrument, filter inductance L1, L2 are connected the output of inverter, are used for suppressing harmonic wave.
Solar energy inverter circuit provided by the present invention is connected in parallel device for power switching S1 and S2, S3 and S4, and the conducting resistance of the 3rd switch N1 and the 4th switch N2 is reduced, and can reduce the conduction loss of brachium pontis under the inverter, improves the operating efficiency of inverter; And when the device for power switching S1, the S2 that are connected in parallel and one of them damage of S3, S4, another can also work on, thereby can improve the reliability of inverter circuit.
In one embodiment, when first switch P 1 and second switch P2 are carried out pulse-width modulation, the 3rd switch N1 and the 4th switch N2 carry out commutation work by following flow process: at positive half period, when first switch P 1 is carried out pulse-width modulation, the 4th switch N2 keeps the positive half period open operation, and second switch P2 and the 3rd switch N1 keep turn-offing at positive half period; At negative half-cycle, when second switch P2 carried out pulse-width modulation, the 3rd switch N1 was held open state, and first switch P 1 and the 4th switch N2 turn-off at negative half-cycle.
First switch P 1 and second switch P2 to brachium pontis on the inverter carry out pulse-width modulation, corresponding following brachium pontis the 3rd switch N1 and the 4th switch N2 commutation work.Output waveform after the pulsewidth modulation after process filtering inductance L 1, L2 carry out filtering, can obtain sinusoidal voltage.
First switch P 1, second switch P2 and the 3rd switch N1, the 4th switch N2 are respectively by the signal controlling of complementation, when carrying out pulse-width modulation, two switches on the same brachium pontis are conducting simultaneously not, can prevent power supply short circuit, and through after the pulse-width modulation, the exportable sinusoidal voltage that is used for driving AC load.
In the above-described embodiments, first switch P 1 and second switch P2 are arranged in parallel, and are the IGBT switching tube.
Brachium pontis comprises first switch P 1 and second switch P2 on the inverter, and in the present embodiment, first switch P 1 and second switch P2 be for being arranged in parallel, and all can be the IGBT switching tube.The IGBT switching tube can be under 20kHz or above operating frequency, and the voltage that solar panel is imported carries out pulse-width modulation, and the voltage of output 50Hz or 60Hz carries out filtering through filter inductance L1, L2, obtains the sinusoidal voltage of low harmonic wave.
Adopt the IGBT switching tube under 20kHz or above high-frequency, to carry out pulse-width modulation, when the sinusoidal voltage of output is carried out filtering, only need to adopt the filter inductance L1 and the L2 of smaller size smaller, just can effectively suppress harmonic wave.
In the above-described embodiments, the 3rd switch N1 and the 4th switch N2 are for being arranged in parallel.
Brachium pontis comprises the 3rd switch N1 and the 4th switch N2 under the inverter, and in the present embodiment, the 3rd switch N1 and the 4th switch N2 are for being arranged in parallel.
The 3rd switch N1 and the 4th switch N2 are set to parallel connection, when first switch P 1 and second switch P2 positive half period and negative half-cycle carry out pulse-width modulation, corresponding the 3rd switch N1 and the 4th switch N2 can distinguish turn-on and turn-off, make inverter output sinusoidal voltage.
In the above-described embodiments, device for power switching is the switch mosfet pipe.
The device for power switching S1 that is connected in parallel and S2, S3 and S4 constitute the 3rd switch N1 and the 4th switch N2 of brachium pontis under the inverter respectively, and in the present embodiment, device for power switching S1 and S2, S3 and S4 can be the switch mosfet pipe.The driving power of switch mosfet pipe is very little, and switching speed is fast, and first switch P 1 and second switch P2 are being carried out pulse-width modulation, when the 3rd corresponding switch N1 and the 4th switch N2 conducting, just can reduce switch resistance consumption.
Device for power switching S1 and S2, S3 and S4 adopt the switch mosfet pipe, because the driving power of switch mosfet pipe is little, switching speed is fast, when conducting, can reduce switch resistance consumption, and with the parallel connection of 2 switch mosfet pipes, the resistance of the 3rd switch N1 and the 4th switch N2 is reduced, thereby reduce conduction loss, improve the efficient of inverter.
In the above-described embodiments, the commutation power frequency of the 3rd switch N1 and the 4th switch N2 is 50HZ or 60HZ.
At the positive half period of pulse-width modulation, first switch P 1 and the 4th switch N2 conducting simultaneously, first switch P 1 is switched to 20kHz or above operating frequency, and at this moment, the 4th switch N2 is switched under the frequency of 50HZ or 60HZ and carries out commutation work; During negative half-cycle, second switch P2 and the 3rd switch N1 conducting simultaneously, second switch P2 is switched to 20kHz or above operating frequency, and at this moment, the 3rd switch N1 is switched under the frequency of 50HZ or 60HZ and carries out commutation work.
When the 3rd switch N1 and the 4th switch N2 conducting, be switched under the low frequency of 50HZ or 60H and carry out commutation work, can reduce switching loss and conduction loss, improve the reliability of solar energy inverter circuit system.
The utility model also provides a kind of solar energy inverter, this device comprises the solar energy inverter circuit, described solar energy inverter circuit comprises inverter and two filter inductance L1, L2, the input of inverter links to each other with solar panel, output links to each other with filter inductance L1, L2, inverter comprises brachium pontis and following brachium pontis, last brachium pontis comprises first switch P 1 and second switch P2, following brachium pontis comprises the 3rd switch N1 and the 4th switch N2, and the 3rd switch N1 and the 4th switch N2 are made of the device for power switching parallel connection.
Inverter links to each other with solar panel, can be with the direct current that solar panel sent, after first switch P 1 of brachium pontis and second switch P2 carry out pulse-width modulation on to inverter, output AC, drive AC load such as household electrical appliance, illumination and motor instrument, filter inductance L1, L2 are connected the output of inverter, are used for suppressing harmonic wave.
The solar energy inverter that the utility model provides, the beneficial effect of the structure of its inverter circuit, principle and enforcement thereof can with reference to above-mentioned Fig. 1 the narration of corresponding embodiment, do not do to be repeated in this description at this.
The above only is a preferred embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (7)
1. solar energy inverter circuit, comprise inverter and two filter inductances, the input of described inverter links to each other with solar panel, output links to each other with filter inductance, inverter comprises brachium pontis and following brachium pontis, and the described brachium pontis of going up comprises first switch and second switch, and described brachium pontis down comprises the 3rd switch and the 4th switch, it is characterized in that described the 3rd switch and the 4th switch are made of the device for power switching parallel connection respectively.
2. solar energy inverter circuit as claimed in claim 1, it is characterized in that, when first switch and second switch are carried out pulse-width modulation, described the 3rd switch, the 4th switch carry out commutation work by following flow process: at positive half period, when first switch carries out pulse-width modulation, the 4th switch keeping positive half period open operation, second switch and the 3rd switch keep turn-offing at positive half period; At negative half-cycle, when second switch carried out pulse-width modulation, the 3rd switch was held open state, and first switch and the 4th switch turn-off at negative half-cycle.
3. solar energy inverter circuit as claimed in claim 2 is characterized in that, described first switch and described second switch are arranged in parallel, and is the IGBT switching tube.
4. solar energy inverter circuit as claimed in claim 3 is characterized in that, described the 3rd switch and described the 4th switch are for being arranged in parallel.
5. solar energy inverter circuit as claimed in claim 4 is characterized in that, described device for power switching is the switch mosfet pipe.
6. solar energy inverter circuit as claimed in claim 5 is characterized in that, the commutation power frequency of described the 3rd switch and the 4th switch is 50HZ or 60HZ.
7. a solar energy inverter comprises each described solar energy inverter circuit in the claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120165934 CN202094816U (en) | 2011-05-23 | 2011-05-23 | Solar inverter circuit and inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120165934 CN202094816U (en) | 2011-05-23 | 2011-05-23 | Solar inverter circuit and inverter |
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| Publication Number | Publication Date |
|---|---|
| CN202094816U true CN202094816U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120165934 Expired - Fee Related CN202094816U (en) | 2011-05-23 | 2011-05-23 | Solar inverter circuit and inverter |
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| CN (1) | CN202094816U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178741A (en) * | 2013-03-04 | 2013-06-26 | 东南大学 | Interleaved parallel switch full-bridge inverter and interleaved parallel control method |
| CN103248255A (en) * | 2013-05-24 | 2013-08-14 | 哈尔滨工业大学 | Tri-phase modular multi-level converter and fault-tolerate detecting method for IGBT (insulated gate bipolar translator) open circuit fault in sub-modules thereof |
| CN108736759A (en) * | 2018-08-30 | 2018-11-02 | 珠海格力电器股份有限公司 | A kind of inverter circuit, frequency converter, motor, compressor and air conditioner |
| CN111566921A (en) * | 2018-01-11 | 2020-08-21 | 莱恩半导体股份有限公司 | Circuit for three-level buck regulator |
| WO2021218372A1 (en) * | 2020-04-29 | 2021-11-04 | 广东致能科技有限公司 | Driving circuit, driving ic, and driving system |
-
2011
- 2011-05-23 CN CN 201120165934 patent/CN202094816U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178741A (en) * | 2013-03-04 | 2013-06-26 | 东南大学 | Interleaved parallel switch full-bridge inverter and interleaved parallel control method |
| CN103248255A (en) * | 2013-05-24 | 2013-08-14 | 哈尔滨工业大学 | Tri-phase modular multi-level converter and fault-tolerate detecting method for IGBT (insulated gate bipolar translator) open circuit fault in sub-modules thereof |
| CN103248255B (en) * | 2013-05-24 | 2014-12-31 | 哈尔滨工业大学 | Tri-phase modular multi-level converter and fault-tolerate detecting method for IGBT (insulated gate bipolar translator) open circuit fault in sub-modules thereof |
| CN111566921A (en) * | 2018-01-11 | 2020-08-21 | 莱恩半导体股份有限公司 | Circuit for three-level buck regulator |
| CN108736759A (en) * | 2018-08-30 | 2018-11-02 | 珠海格力电器股份有限公司 | A kind of inverter circuit, frequency converter, motor, compressor and air conditioner |
| CN108736759B (en) * | 2018-08-30 | 2019-11-15 | 珠海格力电器股份有限公司 | A kind of inverter circuit, frequency converter, motor, compressor and air conditioner |
| WO2021218372A1 (en) * | 2020-04-29 | 2021-11-04 | 广东致能科技有限公司 | Driving circuit, driving ic, and driving system |
| US11870434B2 (en) | 2020-04-29 | 2024-01-09 | Guangdong Zhineng Technology Co., Ltd. | Driving circuit, driving IC, and driving system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LIU TAO Free format text: FORMER OWNER: SHENZHEN H+T INTELLIGENT CONTROL CO., LTD. Effective date: 20120717 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518057 SHENZHEN, GUANGDONG PROVINCE TO: 518000 SHENZHEN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120717 Address after: 518000, 48 floor, golden central building, No. 3037 Jintian Road, Shenzhen, Guangdong, Futian District Patentee after: Liu Tao Address before: 518057 Shenzhen Institute of Aerospace Science and technology, Nanshan District science and Technology Park, Guangdong, Shenzhen, D10 Patentee before: ShenZhen H&T Intelligent Control CO., LTD. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20130523 |