Bidirectional Resonant Converter With Minimized Switching Loss Over Wide Operating Voltage Range

Changkyu Bai, Minsung Kim

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In this article, we propose a bidirectional resonant converter having minimized switching loss in a wide operating voltage range. This converter serves as a pulsewidth-modulation (PWM) full-bridge resonant-boost converter in the forward operation and a PWM half-bridge resonant-buck converter in the reverse operation. It can then achieve a wide voltage gain range even in the reverse operation. By employing a T-type active voltage doubler, we can attain almost zero voltage switching at the turn-off instants, and so switching loss that occurred at all active switches becomes negligible. Moreover, the circuit experiences very little instantaneous reactive current under wide voltage variations. Therefore, the proposed converter can accomplish a wide range of voltage gains in both power flow directions and high efficiency over a wide range of operating voltages. We present circuit operation and steady-state analysis in detail. We built a 3.3-kW/400-V prototype that copes with 250415-V inputs and tested it to demonstrate the superior quality of its circuit design.

Original languageEnglish
Pages (from-to)2975-2988
Number of pages14
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Volume10
Issue number3
DOIs
StatePublished - 1 Jun 2022

Keywords

  • Almost zero voltage switching (ZVS) turn-off
  • bidirectional operation
  • fixed frequency
  • high efficiency
  • minimized switching loss
  • switching modulation

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