Novel ZVZCS PWM DC-DC Converters with One Auxiliary Switch

단일 보조 스위치를 이용한 새로운 ZVZCS PWM DC-DC 컨버터

This paper presents novel ZVZCS PWM DC-DC converters. The proposed soft-switching technique achieves ZVS and ZCS simultaneously at both turn-on and turn-off of the main switch and diode by using only one auxiliary switch. Also, the proposed soft-switching technique is suitable for not only minority but also majority carrier semiconductor devices. The auxiliary circuit of the proposed topology is placed out the main power path and therefore, there are no voltage/current stresses on the main switch and diode. The operating principle of the proposed circuit is illustrated by a detailed study with the boost converter as an example. The validity of the proposed converter is verified by theoretical analysis, simulation and experiment results.