Wide-gain cuk converter

A converter and diode technology, applied in the field of wide-gain cuk converters, can solve the problems of reduced system stability, increased number of power switch tubes, decreased efficiency, etc., and achieves the effects of convenient control, expansion of output voltage gain, and simple structure

Active Publication Date: 2014-01-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The above goals can be achieved by cascading, but it will bring the disadvantages of increasing the number of power switch tubes, reducing system stability and efficiency.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0020] Such as figure 1 As shown, a wide-gain cuk converter mainly includes the input power V g , power switch tube S, first inductor L 1 , the second inductance L 2 , the third inductance L 3 , the first intermediate energy storage capacitor C 1 , the second intermediate energy storage capacitor C 2 , output capacitance C 3 , the first diode D 1 , the second diode D 2 , the third diode D 3 and load R.

[0021] The first diode D 1 The anodes are respectively connected with the first inductor L 1 One terminal and the input supply V g the positive connection of the

[0022] The first diode D 1 The cathodes are respectively connected to the second diode D 2 The cathode and the second inductance L 2 one end of the connection;

[0023] The second diode D 2 The anodes are respectively connected with the first inductor L 1 The other end and the first intermediate energy storage capacitor C 1 one end of the connection;

[0024] The drain of the power switch tube S ...

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Abstract

The invention provides a wide-gain cuk converter. The wide-gain cuk converter mainly comprises a power switch tube, three inductors, two middle energy-storage capacitors, an output capacitor and three diodes. In the working process of the wide-gain cuk converter, the inherent properties of an inductor-capacitor-diode network are utilized, when the power switch tube is switched off, the second inductor charges the first middle energy-storage capacitor, and the first inductor discharges; when the power switch tube is switched on, the first middle energy-storage capacitor and an input power supply charge the first inductor simultaneously, therefore, output voltage is boosted, and the gain of output voltage of the converter is expanded by combining original characteristics of a traditional cuk converter.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a wide-gain cuk converter. Background technique [0002] With the development of life and industry, the requirements for power electronic converters are getting higher and higher, and cuk converters with both boost and step-down functions are used more and more. However, due to its inherent characteristics, the traditional cuk converter has a small output voltage range, and usually the output voltage can only be 0 to 9 times the input voltage. In the case of low-voltage input and high-voltage output, such as distributed energy grid-connected systems and uninterruptible power supply systems, traditional cuk converters become no longer applicable. In order to expand the application range of the traditional cuk converter, it is necessary to expand its output voltage gain through technical improvement. The above-mentioned goals can be achieved by cascading, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10
Inventor 张波张能黄子田丘东元肖文勋
Owner SOUTH CHINA UNIV OF TECH
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