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Series and power supply-isolation flyback DC chopping type monopole multi-input inverter

A DC chopper and DC chopper technology, applied in the direction of converting DC power input to DC power output, converting AC power input to DC power output, and adjusting electrical variables, can solve the problem of two-stage power conversion, low conversion efficiency, Low power density and other issues, to achieve the effect of high reliability, high conversion efficiency, and small output capacity

Active Publication Date: 2018-05-29
QINGDAO UNIV
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  • Claims
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Problems solved by technology

The distributed power generation system realizes multiple input sources simultaneously supplying power to loads and prioritizing the utilization of energy, which improves the stability and flexibility of the system, but there are defects such as two-stage power conversion, low power density, low conversion efficiency, and high cost. Its practicality is limited to a large extent

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  • Series and power supply-isolation flyback DC chopping type monopole multi-input inverter
  • Series and power supply-isolation flyback DC chopping type monopole multi-input inverter
  • Series and power supply-isolation flyback DC chopping type monopole multi-input inverter

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Embodiment Construction

[0028] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments of the specification.

[0029]The isolated flyback DC chopper type single-stage multi-input inverter with simultaneous power supply in series is composed of a multi-input single-output combined isolated bidirectional flyback DC chopper that combines multiple input filters that do not share the same ground with a common output filter. The circuit connection structure, each input end of the multi-input single-output combined isolation bidirectional flyback DC chopper is connected with the output end of each input filter in one-to-one correspondence, and the multi-input single output combined isolation bidirectional flyback DC chopper The output terminal is connected with the output filter circuit, and the multiple-input and single-output combined isolation bidirectional flyback DC chopper is composed of multiple channels connected in...

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Abstract

The invention relates to a series and power supply-isolation flyback DC chopping type monopole multi-input inverter. The circuit structure is formed by connecting a plurality of input filters which are not in common ground and a shared output filtering circuit through a multi-input and single-output combined isolation bidirectional flyback DC chopper, each input end of the multi-input and single-output combined isolation bidirectional flyback DC chopper is connected with an output end of each input filter in one-to-one correspondence, and an output end of the multi-input and single-output combined isolation bidirectional flyback DC chopper is connected with the output filtering circuit. The inverter has the characteristics of divided or simultaneous power supply, monopole power conversion,high power density, high conversion efficiency, high reliability during short-circuit of a load, small output capacity, wide application prospect and the like, multiple input sources are not in common ground, an output and an input are electrically isolated, and a key technology is laid for a small-capacity distributed power supply system for achieving combined power supply of various new energysources.

Description

technical field [0001] The invention relates to a series and simultaneous power supply isolated flyback DC chopper type single-stage multi-input inverter, which belongs to the power electronic conversion technology. Background technique [0002] The inverter is a static converter device that uses power semiconductor devices to convert an unstable and inferior DC power into a stable and high-quality AC power for AC loads or AC grid connection. Inverters with low-frequency electrical isolation or high-frequency electrical isolation between the output AC load or the AC grid and the input DC power supply are called low-frequency link and high-frequency link inverters, respectively. The electrical isolation components mainly play the following roles in the inverter: (1) realize the electrical isolation between the output and input of the inverter, and improve the safety, reliability and electromagnetic compatibility of the inverter operation; (2) realize The matching between the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/5387H02M3/335H02J3/38
CPCH02J3/382H02J3/387H02M3/33584H02M7/53871H02M1/007H02M1/0083
Inventor 陈道炼江加辉
Owner QINGDAO UNIV
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