Passive clamping soft switch high gain boost interleaved parallel converter

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...

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.

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