Inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter

A switched capacitor and soft switching technology, applied in the field of high-gain DC-DC boost converters, can solve the increased difficulty in the design of transformers or coupled inductors, cannot reduce the voltage stress of power switching tubes, and cannot achieve high-gain functions of the converter, etc. problem, to achieve the effect of reducing design difficulty, simple structure and convenient control
CN102832809AInactive Publication Date: 2012-12-19YANSHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANSHAN UNIV
Publication Date
2012-12-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter which comprises a power switch tube, a clamping diode, a rectification diode, a coupling inductor and a regulating inductor and has the following basic functions: the zero-current turning-on of the power switch tube is realized through utilizing the leakage inductance of coupling inductance; the soft turning-off of the power switch tube and lossless transfer of leakage inductance energy are realized through the passive clamping circuit consisting of the clamping diode and a clamping capacitor; the high-gain output of the converter is realized through utilizing a second winding of the coupling inductor and the switch capacitor; the turn ratio of the coupling inductance is prevented from being over-high by utilizing the inductance to regulate and output voltage range; the volume of a magnetic element is reduced by utilizing the bidirectional operation of the magnetic element; the converter is simple in structure, is convenient to control; and loss energy elements are not arranged in the circuit, and the efficiency can be improved. The inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter provided by the invention is mainly applied to the field of renewable energy source and novel energy source power generation with low working voltage level, such as photovoltaic power generation and fuel battery power generation.
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Description

technical field

[0001] The invention relates to a high-gain DC-DC step-up converter, which realizes passive clamping soft switching through the combination of linear inductors, diodes and capacitors. Background technique

[0002] At present, in the known DC-DC conversion technology, the converters that can realize step-up transmission include: Boost chopper, Buck-Boost chopper, Cuk chopper, etc. excitation, flyback, bridge, and push-pull converters, etc.

[0003] The output voltage gain of a transformerless or coupled inductance boost converter is small, and the voltage stress of the power switch tube is relatively large. The power switch tube works as a hard switch, and the switching loss is large. In recent years, some soft-switching converters have been studied successively. There are two main types: one is to realize the soft switching of the power switching tube through additional active power switches and passive inductors, capacitors and other devices; the other is t...

Claims

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