Journal of the Japan Institute of Power Electronics
Online ISSN : 1884-3239
Print ISSN : 1348-8538
ISSN-L : 1348-8538
Operation Evaluation of the Symmetric Switched-Capacitor Snubbers-assisted ZCS Bidirectional DC-DC Converter
Tomokazu MishimaEiji HirakiToshihiko TanakaMutsuo Nakaoka
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2006 Volume 32 Pages 113-121

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Abstract
A new type of soft switched bidirectional DC-DC converter for advanced automotive electric power systems is presented in this paper. This converter consists of dual half-bridge circuits linked with a high frequency transformer, which is applicable as an interface between a high-voltage DC bus line and a low-voltage power source such as Supercapacitor. In order to reduce the switching losses and expand the soft switching range, a newly developed two-lossless switched capacitor snubber-assisted Zero Current Switching (ZCS) are applied to the primary side circuit. By using this ZCS scheme, the soft switching operation can be achieved for the wide range of output power. The converter operation is demonstrated with simulation results, and its feasibility is verified with experimental results using its 1.0kW 25kHz prototype system.
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