Passive clamping soft switch high gain boost interleaved parallel converter

A soft-switching, high-gain technology, applied in the field of passive clamp soft-switching high-gain step-up interleaved parallel converters, can solve the problem of complex external circuits, unable to reduce the voltage stress of the power switch tube, and unable to realize the high-gain function of the converter and other problems, to achieve the effect of improving efficiency, simple structure and convenient control

Active Publication Date: 2007-06-06
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

Although these two methods can realize the soft switching of the power switch tube, the external circuit is complicated, and

Method used

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  • Passive clamping soft switch high gain boost interleaved parallel converter
  • Passive clamping soft switch high gain boost interleaved parallel converter
  • Passive clamping soft switch high gain boost interleaved parallel converter

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Embodiment Construction

[0011] Referring to Fig. 1, the passive clamping soft switching high-gain step-up interleaved parallel converter of the present invention includes two power switch tubes S1, S2, two clamping diodes Dc1, Dc2, and two clamping 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 source of the first power switch tube S1 and the anode of the first clamping diode Dc1. The cathode of a clamping diode Dc1 is connected to one end of the first clamping capacitor Cc1 and one end of the second winding L1b of the first coupled inductor, and the other end of the second winding L1b of th...

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Abstract

An alternatively parallel-connected inverter of passive clamping soft switch and high gain boosting type is prepared as using leakage inductance of two coupled inductances to realize zero current switch-on of power switching tube, utilizing passive clamping circuit formed by clamping diode and clamping capacity to realize soft turn off of power switching tube and nondestructive transfer of leakage inductance energy, utilizing the second and the third windings of two coupled inductances to realize high gain output of said inverter.

Description

technical field [0001] The invention relates to a DC-DC converter. Specifically, it is a passive-clamp 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 , the revers...

Claims

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Application Information

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IPC IPC(8): H02M3/155
CPCY02B70/1491Y02B70/10
Inventor 何湘宁李武华吴建德
Owner ZHEJIANG UNIV
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