Title :
Soft-switching PWM three-level converters
Author :
Ruan, Xinbo ; Zhou, Linquan ; Yan, Yangguang
Author_Institution :
Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., China
fDate :
9/1/2001 12:00:00 AM
Abstract :
This paper proposes a family of modulation strategies for PWM three-level (TL) converters. The modulation strategies can be classified into two kinds according to the turn-off sequence of the two switches of the pair of switches. The concept of the leading switches and the lagging switches is introduced to realize soft-switching for PWM TL converters. The realization of soft-switching for both the leading switches and the lagging switches is proposed, based on which, soft-switching PWM TL converters can be classified into two kinds: zero-voltage-switching (ZVS) and zero-voltage and zero-current-switching (ZVZCS), for which the suitable modulation strategies are pointed out respectively from the family of modulation strategies. A novel ZVZCS TL converter is proposed, its operation principle and parameter design are analyzed, and the experimental results are also included
Keywords :
PWM power convertors; switching circuits; PWM TL converters; ZVS; lagging switches; leading switches; modulation strategies; operation principle; parameter design; soft-switching; soft-switching PWM three-level converters; turn-off sequence; zero-current-switching; zero-voltage-switching; Diodes; Power conversion; Power system harmonics; Pulse width modulation; Pulse width modulation converters; Switches; Switching converters; Topology; Zero current switching; Zero voltage switching;
Journal_Title :
Power Electronics, IEEE Transactions on
