Soft-Switching Technique for a Three-Phase Isolated Matrix Rectifier

  • Author / Creator
    Lin, Xuerui
  • Matrix converters (MC) have attracted more attention recently in high-power applications. Matrix converters can perform direct AC to AC electrical power conversion without DC-link capacitors, which reduce the size of the converter. Matrix rectifiers (MR) inherit all the advantages of traditional matrix converters and are promising in AC-DC applications such as telecommunication systems, front-end power converters for high-voltage direct current (HVDC), and aircraft systems. In this thesis, a novel ZVS operation method for a three-phase isolated matrix- type rectifier is proposed. The presented pulse width modulation (PWM) scheme removed two hard-switch actions and realized ZVS for all twelve MOSFET devices. The ZVS operation of MOSFET switches is analyzed and operating states during switch transitions is discussed. The operation principle of the converter is addressed. The comparison between the proposed PWM and existing 8-segment PWM and 6-segment PWM is presented to show the differences. The effectiveness of ZVS operation of the proposed PWM scheme is verified by both simulation and experimental results.

  • Subjects / Keywords
  • Graduation date
    Fall 2018
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
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