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A New High Efficiency ZVZCS Bidirectional DC/DC Converter for HEV 42V Power Systems  

Kim Chong-Eun (Dept. of Electrical Engineering, KAIST)
Han Sang-Kyoo (School of Electrical Engineering, Kookmin University)
Park Ki-Bum (Dept. of Electrical Engineering, KAIST)
Moon Gun-Woo (Dept. of Electrical Engineering, KAIST)
Publication Information
Journal of Power Electronics / v.6, no.3, 2006 , pp. 271-278 More about this Journal
Abstract
A new high efficiency zero-voltage and zero-current switching (ZVZCS) bidirectional DC/DC converter is proposed in this paper. The proposed converter consists of two symmetric half-bridge cells as the input and output stages. MOSFETs of input stage are turned-on in ZVS condition, and those of output stage are turned-off in ZCS condition. In addition, MOSFETs of input and output stages have low voltage stresses clamped to input and output voltage, respectively. Therefore, the proposed converter has high efficiency and high power density. The operational principles are analyzed and the advantages of the proposed converter are described. The 300W prototype of the proposed converter is implemented for 42V hybrid electric vehicle (HEV) application in order to verify the operational principles and advantages.
Keywords
bidirectional DC/DC converter; zero-voltage switching (ZVS); zero-current switching (ZCS); hybrid electric vehicle (HEV);
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