A novel zero voltage switched (ZVS) buck converter using coupled inductor

Author

Zhang, Yingqi ; Sen, P.C. ; Liu, Yan-Fei

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, Ont., Canada

Volume

1

fYear

2001

fDate

2001

Firstpage

357

Abstract

A novel zero-voltage switched (ZVS) buck converter using a coupled inductor is proposed in this paper. An additional winding is added on the same core of the output filter inductor for the purpose of commutation. The output inductor current is kept in continuous conduction mode (CCM) with small ripple. ZVS conditions for both switches are satisfied over wide load range. The converter can be operated at a fixed switching frequency. High switching frequency and high efficiency can be achieved due to soft switching. The proposed converter is analyzed in detail. Simulation is used to verify the analysis. The concept of ZVS using coupled inductor can also be applied to other PWM converters. ZVS-Boost and ZVS-Buck-Boost converters are derived based on the same concept

Keywords

DC-DC power convertors; PWM power convertors; commutation; power inductors; switching circuits; PWM converters; ZVS; commutation; continuous conduction mode; core; coupled inductor; output filter inductor; output inductor current; simulation; soft switching; switching frequency; winding; zero voltage-switched buck converter; Buck converters; Filters; Inductors; Pulse width modulation converters; Resonance; Stress; Switches; Switching converters; Switching frequency; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2001. Canadian Conference on

Conference_Location

Toronto, Ont.

ISSN

0840-7789

Print_ISBN

0-7803-6715-4

Type

conf

DOI

10.1109/CCECE.2001.933710

Filename

933710