Accurate Prediction of Incomplete Zero-Voltage Switching Dynamics and Losses

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Abstract

The switching losses occurring between full soft-switching and hard-switching are described inadequately, and previous attempts of quantifying incomplete zero-voltage switching losses are topology specific and not applicable for any general half-bridge circuit. The ability to quantity these losses is crucial to optimize the converter efficiency across a wide operating range. This paper proposes a general method for accurately estimating the incomplete zero-voltage switching dynamics and losses in half-bridge converters, including the non-linear output capacitance of the semiconductors. The charge balance during the switching transition period is solved to determine the depth of incomplete zero-voltage switching, which can be used to predict the switching losses. The method is verified experimentally, and is shown to be able to predict the depth of incomplete zero-voltage switching accurately, which can be used to calculate the related losses.
Original languageEnglish
Title of host publication2023 IEEE 10th Workshop on Wide Bandgap Power Devices and Applications, WiPDA 2023
PublisherIEEE
Publication date2023
Article number10382222
ISBN (Print)9798350337143
ISBN (Electronic)9798350337136
DOIs
Publication statusPublished - 2023
SeriesIEEE Workshop on Wide Bandgap Power Devices & Applications (WiPDA)
ISSN2641-8274

Keywords

  • Zero voltage switching (ZVS)
  • Wide band gap devices
  • incomplete ZVS
  • Semiconductor
  • Half bridge (HB)
  • Switching losses

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