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A high gain zeta DC-DC converter

A converter and high-gain technology, applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc., can solve the problems of large loss and many switching components, and achieve low voltage stress and high input and output gain Effect

Active Publication Date: 2022-02-01
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the existing isolated high-gain DC-DC converter has many switching components and large losses, the present invention proposes a new type of high-gain Zeta DC-DC converter based on the basic Zeta circuit

Method used

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  • A high gain zeta DC-DC converter
  • A high gain zeta DC-DC converter
  • A high gain zeta DC-DC converter

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] Such as figure 2 Shown is the circuit topology diagram when the number of gain expansion units of the present invention is n=3:

[0036] A new type of high-gain Zeta DC-DC converter, which includes a DC input source, a basic Zeta converter, n-1 gain expansion units, and a leakage inductance absorption unit; where:

[0037] The basic Zeta transformer consists of a primary and secondary side n 1 :n 2 Transformer, three inductors L, L r , L 1, two capacitors C 11 、C 12 , a power switch S 1 , a diode D 1 ; Its connection form is as follows: power switch S 1 The drain of the DC input source is connected to the positive pole of the power switch S 1 The source is connected to one end of the inductor L and the inductor L r at one end, the inductance L r The other end of the inductor is connected to the upper end of the primary side of the transfor...

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Abstract

A high-gain Zeta DC-DC converter includes a DC input source, a basic Zeta converter, and n-1 gain expansion units. The gain expansion unit is composed of an inductor, two capacitors and a diode. By adjusting the number of the gain expansion unit, the input and output gain of the converter and the voltage stress of the switching device can be adjusted. The converter has the advantages of simple control and driving circuit, wide adjustment range of input and output voltages, low voltage stress of switching devices, etc., and is more suitable for applications where the input voltage and output voltage change range is relatively large.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to a high-gain Zeta 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 Flyback, isolated Cuk, isolated 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. At present, most of the schemes for increasing the input and output gain of DC-DC converters are based on isolated Boost circuits cascaded with DC transformers. Therefore, these circuits have many switching components and large losses. Therefore, it is of great significance to realize a new t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
Inventor 邾玢鑫戴俊平张耀杨楠马辉
Owner CHINA THREE GORGES UNIV
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