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Multi-input high-reliability Zeta DC-DC converter

A converter, multi-input technology, applied in the conversion of DC power input to DC power output, climate sustainability, high-efficiency power electronic conversion, etc., can solve the problem of low reliability of high-gain DC-DC converters, and achieve input High output gain effect

Pending Publication Date: 2022-01-04
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of low reliability of the existing non-isolated multi-input high-gain DC-DC converter

Method used

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  • Multi-input high-reliability Zeta DC-DC converter
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  • Multi-input high-reliability Zeta DC-DC converter

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Embodiment Construction

[0059] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0060] Such as figure 2 Shown is the circuit topology diagram when the number of forward expansion units of the present invention is 1 and the number of reverse expansion units is 2: a multi-input high-reliability Zeta DC-DC converter, which includes 4 DC input sources, A basic Zeta converter, 1 positive voltage expansion unit, 2 negative voltage expansion units; where:

[0061] A basic Zeta converter consists of two inductors L 1 , L 2 , two capacitors C 1 、C 2 , a power switch S 1 , a diode D 1 ; Its connection form is as follows: power switch S 1 The drain is connected to the DC input source u in The positive terminal, its source is connected to the inductor L 1 One end of and the capacitor C 1 One end of the capacitor C 1 The other end of the inductor L is connected to the 2 one end of the diode D 1 connected to the cathode, the inductor L ...

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Abstract

The invention discloses a multi-input high-reliability Zeta DC-DC converter. The converter comprises m + n + 1 direct current input sources, a basic Zeta converter, m forward voltage expansion units and n negative voltage expansion units. Each expansion unit is composed of a direct current source, two inductors, two capacitors and a diode, and the input and output gains of the converter and the voltage stress of a switching device can be adjusted by adjusting the number of the expansion units. The converter has the characteristics of simple control and drive circuit, wide input and output voltage regulation range and high reliability; when one switching tube is damaged, other circuits can work normally. The circuit is suitable for application occasions where the change range of output input voltage and output voltage is large, multiple power supplies are needed to supply power at the same time, and the reliability requirement is high.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a multi-input high-reliability Zeta DC-DC converter. Background technique [0002] In applications where both the input and output voltages vary widely, the input voltage can be either higher or lower than the output voltage. Common non-isolated buck-boost DC-DC converters applicable at this time include Buck-Boost, Cuk, Sepic and Zeta circuits. Theoretically, by adjusting the duty cycle D, the input and output gains of these converters can vary from zero to infinity, but due to the influence of components and circuit parasitic parameters, the boosting capability of these converters is greatly limited. [0003] At present, the input and output gain schemes of multi-input DC-DC converters basically do not have high-gain output, and their reliability is poor. Therefore, it is of great significance to study a multi-input buck-boost DC / DC converter that can achieve high-gain boost and also have...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/08H02M1/32H02M1/42
CPCH02M3/156H02M1/08H02M1/32H02M1/42Y02B70/10
Inventor 邾玢鑫杜伟兮刘佳欣
Owner CHINA THREE GORGES UNIV
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