A novel square-wave converter with bidirectional power flow

H.L. Chan, Ka Wai Eric Cheng, D. Sutanto

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic research


A novel ZVS phase-shift controlled bidirectional DC-DC convertor is proposed. It possesses the conventional features of phase-shifted convertors, including constant switching frequency, zero-voltage switching (ZVS) and voltage controlling by phase-shift. However, the new convertor has been improved by developing a bi-directional power flow capability and applying synchronous rectification, hence the on-state voltage drop of the active devices are small. Therefore it is recommended for use in electric vehicle (EV). In this paper, the principle of circuit operation of the proposed convertor was described in detail with mathematical calculations, and the experimental results were also given to verify the concept.
Original languageEnglish
Title of host publicationPEDS'99 : proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems : 27-29 July 1999, Hong Kong
ISBN (Print)0780357698
Publication statusPublished - 1999


  • Capacitors
  • Diodes
  • Electric load flow
  • Electric network topology
  • Electric vehicles
  • Frequencies
  • MOSFET devices
  • Phase shift
  • Switching
  • Voltage control
  • Waveform analysis


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