Improved ZCS-PWM commutation cell for IGBTs application

• Published in: IEEE transactions on aerospace and electronic systems Vol. 40; no. 3; pp. 879 - 888
• Main Authors: Wang, Chien-Ming, Su, Juing-Huei, Yang, Chia-Hao
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.07.2004; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Commutation; Converters; Design engineering; Dynamical systems; Dynamics; Electronics; Frequency; Guidelines; Insulated gate bipolar transistors; Mathematical models; Prototypes; Pulse duration modulation; Pulse width modulation; Pulse width modulation converters; Stress; Switches; Zero current switching; Zero voltage switching
• ISSN: 0018-9251; 1557-9603
• DOI: 10.1109/TAES.2004.1337461

An improved zero-current-switching pulsewidth-modulated (ZCS-PWM) commutation cell is presented, which is suitable for high-power applications using insulated gate bipolar transistors (IGBTs) as the power switches. It provides ZCS operation for active switches and zero-voltage-switching (ZVS) operation for passive switches. Besides operating at constant frequency and reducing commutation losses, the proposed ZCS-PWM switch cell has no additional current stress and conduction loss in the main switch. To demonstrate the feasibility of the proposed ZCS-PWM commutation cell, it was applied to a boost converter. Operating principle, theoretical analysis, design guidelines, and a design example are described and verified by experiment results obtained from a prototype rated 1 kW and operating at 40 kHz. The PWM switch model and state-space averaging approach is also used to estimate and examine the steady-state and dynamic character of ZCS-PWM boost converter system. Finally, the application of the proposed soft-switching technique in the dc-dc nonisolated converters is presented.