A Novel Low-Voltage / High-Current ZCS-PWM DC- DC Converter with Asymmetrical Auxiliary Edge-Resonant Lossless Snubber

Author

Mishima, Tomokazu ; Hiraki, Eiji ; Tanaka, Toshihiko ; Nakaoka, Mutsuo

Author_Institution

Kure Coll. of Technol., Hiroshima

fYear

2007

Firstpage

748

Lastpage

753

Abstract

A novel zero current soft-swithing PWM half-bridge DC-DC converter topology is proposed in this paper. The newly proposed converter consists of a PWM-controlled half-bridge inverter and a current doubler rectifier linked with a high- frequency transformer. In order to attain the wide range of soft switching operation in the high voltage/low current primary side inverter, asymmetrical lossless snubbers composed by an actively-switched capacitor and lossless inductors are employed in the half-bridge arm, providing zero current switching (ZCS) that is less sensitive to the magnitude of the input current. The operation characteristics of the proposed DC-DC converter are described, and its feasibility is demonstrated with simulation and experimental results.

Keywords

DC-DC power convertors; PWM invertors; PWM power convertors; PWM rectifiers; bridge circuits; high-frequency transformers; resonant invertors; resonant power convertors; snubbers; switching convertors; zero current switching; ZCS-PWM DC-DC converter; actively-switched capacitor; asymmetrical auxiliary edge-resonant lossless snubber; current doubler rectifier; high-frequency transformer; lossless inductors; zero current soft-swithing half-bridge inverter; DC-DC power converters; Frequency conversion; Low voltage; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Snubbers; Topology; Zero current switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2007. PESC 2007. IEEE

Conference_Location

Orlando, FL

ISSN

0275-9306

Print_ISBN

978-1-4244-0654-8

Electronic_ISBN

0275-9306

Type

conf

DOI

10.1109/PESC.2007.4342081

Filename

4342081