Novel ZVZCT soft-switching cell in PWM DC-DC converter

作者：Hu, Zong-Bo; Zhang, Bo; Deng, Wei-Hua

来源：Proceedings of the CSEE, 2004, 24(3): 126-134.

• DC DC converter
• Freewheeling diode
• Soft switching cell
• Zero voltage zero current transition

A zero-voltage zero-current transition (ZVZCT) soft-switching cell is presented. Based on the proposed soft-switching cell, a Buck ZVZCT pulse width modulation (PWM) converter is built. The converter has such advantages as zero-voltage zero-current switching in main switch, zero-current turn-on and zero-voltage zero-current turn-off in auxiliary switch, zero-current zero-voltage turn-off and zero-voltage turn-on in freewheeling diode. In addition, the ZVZCT soft-switching cell is suitable for Buck converter with minority-carrier device and majority-carrier device, both in PWM control. The ZVZCT soft-switching cell can be used in most power converter. The operation principles, simulation analysis and experimental verification of Buck ZVZCT PWM converter are given. Experimental results verify theoretical analysis.

• 出版日期2004-3
• 单位华南理工大学