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Multiple input flyback converter

A flyback converter, multi-input technology, applied in the direction of converting DC power input to DC power output, output power conversion device, conversion equipment with intermediate conversion to AC, etc. Single, anti-reverse diode channels cannot be turned on at the same time, etc.

Inactive Publication Date: 2009-11-25
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing multi-input flyback converter can realize multi-input by using magnetic flux coupling, but the number of primary windings of the converter is the same as the number of input channels, the voltage stress of the switching tube is high, the input needs anti-flyback diodes, and each channel cannot be conducted at the same time. pass, the control method is relatively simple

Method used

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Embodiment Construction

[0011] Such as figure 1 As shown, the structure of the multi-input flyback converter of the present invention includes: N input channel circuits, a flyback converter circuit 10 and an output rectifier circuit 20, where N is a natural number greater than 1, wherein: the input channel circuit includes a DC power supply , a power switch tube and a freewheeling diode, the anode of the DC power supply is connected to the drain of the power switch tube, the source of the power switch tube is connected to the cathode of the freewheeling diode, the anode of the freewheeling diode is connected to the negative pole of the DC power supply, and N input channel circuits A freewheeling diode is connected in series; the flyback converter circuit 10 includes a flyback power switch tube Q N+1 And the flyback transformer, the flyback transformer includes the primary winding N P and the secondary winding N S , primary winding N P The opposite ends of the first input channel circuit 1 are resp...

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Abstract

The invention discloses a multiple input flyback converter belongs to direct current converter field in electrical energy changer. The converter structure includes N input channel circuits, flyback converter circuits and output rectifier circuits, N is a natural number bigger than one, wherein N input channel circuits are concatenated by fly-wheel diodes, same terminal and differet terminal of primary winding in flyback converter circuit are respectively connected with cathode of fly-wheel diode in the first input channel circuit and drain of flyback switch tube in flyback converter circuit, source electrode of the flyback switch tube is connected with anode of fly-wheel diodes in the Nth input channel circuit, a vice-side winding is connected with the output rectifier circuit. As long as there is a continuity signal in switch tube of the input channel, theb switch tube of the flyback converter has a drive signal, when all the switch tubes in input channel circuit are continued at the same time, all the input power supply electric power to the load at the same time is implemented, input side of the converter has only one winding that can reduce size of the converter in multi-channel input situation.

Description

technical field [0001] The invention relates to a multi-input flyback converter, which belongs to the field of DC converters in electric energy conversion devices. Background technique [0002] With the continuous shortage of fossil energy and the aggravation of environmental pollution, the distributed power generation system based on new energy and renewable energy has become a research hotspot, and the direct-to-direct converter is an important part of it. However, new energy and renewable energy, such as: solar energy, wind energy, etc., vary greatly with climate and regional differences, and the power supply is unstable and discontinuous. In addition, the output voltage of fuel cells changes with changes in load. Therefore, in order to ensure continuous Reliably supplying power to loads requires multiple new energy sources to complement each other to form a combined power supply system. [0003] Since there are multiple input sources in the system, the voltage of each i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/28H02M3/335
Inventor 王勤张杰阮新波周晨
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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