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A modified ZVZCS commutation cell for all active switches in PWM converters

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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

In this paper, a modified ZVZCS commutation cell with minimum additional components, which provides soft switching at both turn-on and turn-off of main and auxiliary switches as well as diodes in PWM converters, is presented. The proposed soft-switching technique is suitable for not only minority but also majority carrier semiconductor devices. The auxiliary switch of the proposed ZVZCS commutation cell is in parallel with the main switch, and therefore, there is no current stress on the main switch and diode. The operation principles of the proposed ZVZCS commutation cell are theoretically analyzed using the PWM boost converter topology as an example. Theoretical analysis, simulation and experimental results verify the validity of the PWM boost converter topology with the proposed ZVZCS commutation cell

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Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE  (Volume:2 )

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