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Multi-input high-reliability Cuk DC-DC converter

A converter and multi-input technology, which is applied to the conversion equipment of Cuk converters, DC power input conversion to DC power output, output power conversion devices, etc., can solve the problem of low reliability of high-gain DC-DC converters problem, to achieve the effect of high input and output gain

Pending Publication Date: 2022-01-21
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 Cuk DC-DC converter
  • Multi-input high-reliability Cuk DC-DC converter
  • Multi-input high-reliability Cuk DC-DC converter

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0041] Such as figure 2 As shown, it is the circuit topology diagram when the number of reverse expansion units of the present invention is 2:

[0042] A multi-input high-reliability Cuk DC-DC converter, which includes 3 DC input sources, a basic Cuk converter, and 2 forward voltage expansion units; where:

[0043] A basic Cuk 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: inductance L 1 Connect to DC input source u in1 positive pole of the power switch S 1 The drain connection inductance 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 anode, the inductor L 2 The other end of the capacitor C 2 Connected to one end of the power switch S...

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Abstract

The invention discloses a multi-input high-reliability Cuk DC-DC converter. The converter comprises n+1 direct-current input sources, a basic Cuk converter and n forward voltage expansion units, wherein each forward 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 forward 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; and the converter 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 requirement on reliability is high.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a multi-input high-reliability Cuk DC-DC converter. Background technique [0002] In applications where the input and output voltages vary greatly, the input voltage may be higher than the output voltage, or lower than the output voltage. At this time, the common non-isolated buck-boost DC-DC converters are Buck-Boost, Zeta, Sepic and Cuk 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 high-gain boost and also have h...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M3/157H02M3/00
CPCH02M3/158H02M3/157H02M3/005
Inventor 邾玢鑫杜伟兮杨玉良刘佳欣周生奇
Owner CHINA THREE GORGES UNIV
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