Title :
Performance improvement of soft-switched PWM rectifiers with inductive load
Author :
Pomilio, José Antenor ; Rossetto, Leopoldo ; Tenti, Paolo ; Tomasin, Paolo
Author_Institution :
Electr. Eng. Dept., State Univ. of Campinas, Brazil
fDate :
1/1/1997 12:00:00 AM
Abstract :
A new soft-switched AC/DC pulse width modulation (PWM) converter structure is presented. It is useful for current-fed inverters and PWM rectifiers. Typical applications are magnet power supplies, high-power AC motor drives, and active power filters with magnetic energy storage. Soft switching is provided at the expense of a limited increase of the circuit complexity as compared to usual hard-switching solutions. A discussion of the soft commutation process is presented. By a proper switching sequence, overvoltages across the converter switches can be fully eliminated. Moreover, light-load operation can be achieved. Both typical limitations of soft-switched current-fed topologies are therefore overcome. Simulation and experimental results demonstrate the actual converter capabilities
Keywords :
AC-DC power convertors; PWM power convertors; commutation; rectifying circuits; switching circuits; active power filters; current-fed inverters; high-power AC motor drives; inductive load; light-load operation; magnet power supplies; magnetic energy storage; overvoltages elimination; soft commutation process; soft-switched AC/DC PWM converters; soft-switched PWM rectifiers; switching sequence; AC motors; Active filters; Analog-digital conversion; Magnetic separation; Power supplies; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Pulsed power supplies; Rectifiers;
Journal_Title :
Power Electronics, IEEE Transactions on
