Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE
Conference_Location :
Charlotte, NC
DOI :
10.1109/APEC.2015.7104631
