Frequency Modulation Method of ZVT Interleaved DC/DC Converter Using Auxiliary Coupled-Inductor

보조 커플드-인덕터를 이용한 ZVT 인터리브드 DC/DC 컨버터의 주파수 변조 기법

This paper presents frequency modulation method of zero-voltage-transition interleaved DC/DC converter using auxiliary coupled-inductor. In conventional ZVT interlaved converter without semi-conductor devices in auxiliary circuit, the peak-to-peak value of coupled-inductor current has fixed value despite the change of load current. Then, as the load is reduced, the efficiency is reduced because of the conduction loss. The proposed frequency modulation method can reduce the conduction loss by controlling the current of coupled-inductor as the load condition using frequency modulation. The proposed method is verified by experimental results.