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A wide gain sepic converter

A converter and inductor technology, applied in the field of wide-gain sepic converters, can solve the problems of increasing the number of switching tubes, reducing system stability, and reducing efficiency, and achieves the effects of output voltage gain expansion, convenient control, and simple structure

Active Publication Date: 2015-10-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • A wide gain sepic converter
  • A wide gain sepic converter
  • A wide gain sepic converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] Such as figure 1 As shown, a wide-gain sepic converter mainly includes the input power supply 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.

[0022] The first diode D 1 The anodes are respectively connected with the first inductor L 1 One end of the input power supply V g the positive connection of the

[0023] The first diode D 1 The cathodes are respectively connected to the second diode D 2 The cathode, the second inductance L 2 one end of the connection;

[0024] The second diode D 2 The anodes are respectively connected with the first inductor L 1 The other end of the first intermediate energy storage capacitor C 1 one end of the connection;

[0025] The drain of the power switch tu...

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Abstract

The invention provides a wide-gain sepic converter. The wide-gain sepic 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 sepic 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 sepic converter.

Description

technical field [0001] The invention relates to the technical field of power electronic converters, in particular to a wide-gain sepic converter. Background technique [0002] With the development of life and industry, the requirements for power electronic converters are getting higher and higher, and sepic converters with both boost and step-down functions have been applied to varying degrees in more and more industrial fields. However, the traditional sepic converter is limited by its inherent characteristics, the output voltage range is small, and the output voltage is usually only 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 fuel cell systems, traditional sepic converters are no longer applicable. In order to expand the scope of application of the traditional sepic converter, it is necessary to expand its output voltage gain through technical improvement. The above-mentio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/07
Inventor 张波张能黄子田丘东元肖文勋
Owner SOUTH CHINA UNIV OF TECH