Abstract

A soft switching boost converter that uses an auxiliary switch and resonant circuit is proposed in this paper. The main switch performs soft switching under zero voltage condition by using a resonant capacitor and an inductor, auxiliary switch and diode. The conventional boost converter generates switching losses at turn on and off and this reduces the whole system efficiency. But the soft switching boost converter reduces the switching losses more than the conventional boost converter. The efficiency is increased to 96% in this soft switching converter. This converter is suitable for applications such as high-efficiency converters, photovoltaic dc/dc converters, a power-factor-correction circuit, and battery chargers.

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