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Double-input high-reliability Cuk DC-DC converter

A converter and dual-input technology, which is applied in the field of dual-input high-reliability CukDC-DC converters, can solve the problems of low reliability of high-gain DC-DC converters and achieve high input and output gains

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 dual-input high-gain DC-DC converter

Method used

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  • Double-input high-reliability Cuk DC-DC converter
  • Double-input high-reliability Cuk DC-DC converter
  • Double-input high-reliability Cuk DC-DC converter

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Embodiment Construction

[0052] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0053] Such as image 3 Shown is the circuit topology diagram when the number of expansion units of the present invention m=1, n=1:

[0054] A dual-input high-reliability Cuk circuit, the converter includes two DC input sources, a load, a basic Cuk converter, a basic Sepic circuit, a forward expansion unit, and a reverse voltage expansion unit. in:

[0055] 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 One end of the DC input source u in1 positive pole, the inductor L 1 The other ends are respectively connected to the power switch S 1 the drain as well as 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 T...

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Abstract

The invention discloses a double-input high-reliability Cuk DC-DC converter. The converter comprises two DC input sources, a basic Cuk converter, a basic Sepic converter, m forward expansion units and n backward voltage expansion units. Each of the forward expansion units and the reverse expansion units is composed of an inductor, two capacitors and a diode, and the input and output gain of the converter and the voltage stress of a switching device can be adjusted by adjusting the number of the forward expansion units and the number of the reverse 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; and the converter is suitable for application occasions where the change range of output input voltage and output voltage is large, two 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 double-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. The common non-isolated buck-boost DC-DC converters that are 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, most schemes for the input and output gain of the dual-input DC-DC converter are constructed by connecting basic circuits in parallel, but the reliability is poor. Therefore, it is of great significance to study a dual-input buck-boost DC / DC con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M3/157H02M3/00
CPCH02M3/158H02M3/157H02M3/005
Inventor 邾玢鑫刘佳欣赵宇辉周生奇支树播
Owner CHINA THREE GORGES UNIV
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