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Active clamp zero voltage soft switch high gain booster staggered parallel converter

A soft-switching, high-gain technology, applied in the field of active clamp zero-voltage soft-switching high-gain boost interleaved parallel converters, can solve the problem of complex external circuits, inability to achieve high-gain functions of the converter, and inability to reduce power switching transistors. Voltage stress and other problems, to achieve the effect of less additional components, improved output gain and circuit efficiency, and simple structure

Inactive Publication Date: 2008-12-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two methods can realize the soft switching of the power switch tube, the external circuit is complicated, and the voltage stress of the power switch tube cannot be reduced, and the high gain function of the converter cannot be realized.

Method used

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  • Active clamp zero voltage soft switch high gain booster staggered parallel converter
  • Active clamp zero voltage soft switch high gain booster staggered parallel converter
  • Active clamp zero voltage soft switch high gain booster staggered parallel converter

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Embodiment Construction

[0012] see figure 1 , the active-clamp zero-voltage soft-switching high-gain step-up interleaved parallel converter of the present invention comprises two power switch tubes S1, S2, two clamp switch tubes Sc1, Sc2, and two clamp capacitors Cc1, Cc2 , two freewheeling diodes Do1, Do2 and two coupled inductors, the first coupled inductor has three windings L1a, L1b, L1c, the second coupled inductor has three windings L2a, L2b, L2c, the first coupled inductor's first winding L1a One end of the first coupled inductor is connected to one end of the first winding L2a of the second coupling inductor, and the other end of the first winding L1a of the first coupled inductor is connected to the drain of the first power switch S1, the source of the first clamping switch Sc1 and One end of the second winding L1b of the first coupling inductor is connected, the drain of the first clamping switch Sc 1 is connected to one end of the first clamping capacitor Cc1, and the other end of the seco...

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Abstract

This invention discloses active clamp zero-voltage soft switch high gain boost staggered parallel converters including two power switch tubes, two clamp switch tubes, two clamp capacitors, two continuing flow diodes and two coupled inductors, in which, each of the two coupled inductors includes three windings, which utilizes the second and third windings of the two coupled inductors to realize high gain output of the converter, utilizes a serial circuit composed of the two clamp switch tubes and two clamp capacitors to absorb and transfer harmlessly the leak energy of the two coupled inductors and realizes turn on of zero voltage of two power switch tubes and zero voltage turn-off of them utilizing the parallel capacitors of the two switch tubes to further realize zero-voltage turn on and off of the two clamp switch tubes.

Description

technical field [0001] The invention relates to a DC-DC converter. Specifically, it is an active-clamp zero-voltage soft-switching high-gain step-up interleaved parallel converter. Background technique [0002] A conventional step-up (Boost) interleaved parallel DC-DC converter includes two inductors, two freewheeling diodes, two power switch tubes, the drain of the first power switch tube and the anode of the first diode and One end of the first inductance is connected, the drain of the second power switch tube is connected with the anode of the second diode and one end of the second inductance, and the other end of the first inductance is connected with the other end of the second inductance. The output voltage gain of this step-up interleaved parallel DC-DC converter is small, the voltage stress of the power switch tube is large, the power switch tube works as a hard switch, the switching loss is large, and the reverse recovery current of the freewheeling diode is large ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/10H02M3/155H02M3/156
CPCY02B70/10
Inventor 何湘宁李武华
Owner ZHEJIANG UNIV
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