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Multi-input high-reliability capacitor current consistent type Zeta DC-DC converter

A converter, multi-input technology, applied in high-efficiency power electronic conversion, conversion of DC power input to DC power output, adjustment of electrical variables, etc., can solve the problem of low reliability of high-gain DC-DC converters, and achieve input and output high 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 capacitor current consistent type Zeta DC-DC converter
  • Multi-input high-reliability capacitor current consistent type Zeta DC-DC converter
  • Multi-input high-reliability capacitor current consistent type Zeta DC-DC converter

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Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0051] like figure 2 Shown is the circuit topology diagram of the present invention when the number of forward expansion units is 1 and the number of reverse expansion units is 2:

[0052] A multi-input high-reliability capacitive current consistent type Zeta DC-DC converter, which includes 4 DC input sources, a basic Zeta converter, 1 positive voltage expansion unit, and 2 negative voltage expansion units unit; where:

[0053] A basic Zeta converter consists of two inductors L 1 , L2 , 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 diod...

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Abstract

The invention discloses a multi-input high-reliability capacitor current consistent type 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 advantages of being simple in control and drive circuit, wide in input and output voltage adjusting range and high in reliability, and 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 capacitor current consistent type 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 have poor reliability. Therefore, it is of great significance to study a multi-input buck-boost DC / DC converter that can realize ...

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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