Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Improved Zero-Current- Transition (ZCT) PWM Switch Cell

개선된 영전류 과도상태 PWM 스위치 셀

  • Choi, Hang-Seok (School of Electrical Engineering, Seoul National University) ;
  • Cho, B.H. (School of Electrical Engineering, Seoul National University)
  • Published : 2001.07.18
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Abstract

This paper proposes a new zero-current transition (ZCT) pulse-width modulation (PWM) switch cell that overcomes the limitations of the conventional ZCT converters. The proposed ZCT cell provides zero-current-switching (ZCS) condition for the main switch and the auxiliary switch. The conduction loss and current stress of the main switch are minimized, since the circulating current for the soft switching does not flow through the main switch. The proposed ZCT PWM switch cell is suitable for the high power applications employing IGBTs. Design guidelines with a design example are described and verified by experimental results from the 1 kW prototype boost converter operating at 70kHz.

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