2001•Unpublished venueRequires access

Analysis and Design of Class E Isolated DC/DC Converter Using Class E Low PWM

Synchronous Rectifier, Itsda Boonyaroonate, Shinsaku Mori

Abstract

A class E isolated dc/dc converter for regulating the output voltage at a fixed switching frequency is presented, analyzed and experimentally verified. It consists of class E series-resonant inverter, high-frequency transformer and class E low pulse width modulation (PWM) synchronous rectifier. By controlling the conduction time of controlled switch in rectifier, high-frequency ac current is rectified and the output voltage can be controlled at the same time. The zero voltage switching (ZVS) condition of all switches can be maintained from full-loaded to open-loaded. The theoretical predictions were in good agreement with the experi- mental measurements and the maximum efficiency measured at switching frequency 1 MHz was 91.2%.

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Key concepts: Pulse-width modulation, Transformer, Inverter, Control theory (sociology), Voltage, Forward converter, Switching frequency, Rectifier (neural networks)