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High Power Bidirectional DC-DC Converter

The goal of this project is to develop a high-efficiency bidirectional DC-DC charger for hybrid EV battery charging. Work began in 1998, and was sponsored by Ford, Ecostar, Ballard, Army Research Lab and United Silicon Carbide.
Key Technologies:
  • Multiphase interleaved to reduce current ripple and passive components
  • Coupled magnetics for core loss reduction
  • Synchronous conduction mode operation to reduce switching loss
Efficiency Measurement Results:
  • Use regenerative connection to measure losses
  • Measured efficiency exceeds 99%
  • High power density with small inductor and reduced cooling requirement


Address: 220 Inventive Ln, Blacksburg, VA 24061
Tel: (540) 231-5581   Fax: (540) 231-3362

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