High frequency resonant SEPIC converter with small turn-on current noises

Abstract

Resonant converters have wide application in power conversion facilities based on renewable energy systems. This paper presents a new family of resonant Single Ended Primary Inductor Converter (SEPIC) suitable for high frequency dc-dc power conversion. The proposed circuit features ideal soft-switching and zero-voltage resonant operation at turn-on switching edge to enable high efficiency and low noise, buck and boost voltage conversion. In addition, a multi-resonant derivation is presented which provides resonant soft switching as well in rectifier diode as in main inverter switch.