High-efficiency low-cost soft-swtiching DC-DC converter for EV on-board battery chargers

Author

Min-Kwon Yang ; Hyoung-Sup Cho ; Seung-Jae Lee ; Woo-Young Choi

Author_Institution

Div. of Electron. Eng., Chonbuk Nat. Univ., Jeonju, South Korea

fYear

2015

fDate

15-19 March 2015

Firstpage

2050

Lastpage

2055

Abstract

This paper proposes a high-efficiency soft-switching pulse-width modulated (PWM) full-bridge (FB) dc-dc converter for the on-board battery charger of electric vehicles (EVs). Asymmetrical PWM (APWM) FB converter is proposed with zero-voltage switching (ZVS) of the power switches and zero-current switching (ZCS) of an output diode. Switching losses can be reduced by achieving ZVS and ZCS. Conduction losses are also reduced by eliminating circulating currents. Compared to the conventional phase-shift modulated (PSM) FB converter, the proposed converter has less component counts and reduces power losses, improving the power efficiency. As a result, a high efficiency can be achieved for the on-board battery charger of EVs. The performance of the proposed converter is evaluated by experimental results for an 1.0 kW prototype circuit.

Keywords

DC-DC power convertors; PWM power convertors; battery chargers; battery powered vehicles; switching convertors; zero current switching; zero voltage switching; electric vehicle; full bridge DC-DC converter; on-board battery charger; output diode zero current switching; power 1 kW; power switch zero voltage switching; pulse width modulated DC-DC converter; soft swtiching DC-DC converter; Batteries; Battery chargers; DC-DC power converters; Pulse width modulation; Voltage measurement; Zero current switching; Zero voltage switching;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE

Conference_Location

Charlotte, NC

Type

conf

DOI

10.1109/APEC.2015.7104631

Filename

7104631