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Novel ZVZCS PWM DC-DC converters using one auxiliary switch

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4 Author(s)
Seung-Hee Ryu ; Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea ; Dong-Yun Lee ; Sang-Bong Yoo ; Dong-seok Hyun

This paper presents new zero-voltage/zero-current-switching (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, this technique is suitable for not only minority but also majority carrier semiconductor devices. The auxiliary circuit of the proposed topologies is placed out the main power path, therefore, there are no voltage/current stresses on the main switch and diode. The operating principle of the proposed topologies is illustrated by a detailed study with a boost converter as an example. Theoretical analysis, simulation and experimental results are presented to explain the proposed schemes

Published in:

Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual  (Volume:2 )

Date of Conference:

14-18 Mar 1999