Performance improvement of soft-switched PWM rectifiers with inductive load

Author

Pomilio, J.A. ; Rossetto, L. ; Tenti, P. ; Tomasin, P.

Author_Institution

Fac. of Electr. Eng., State Univ. of Campinas, Brazil

fYear

1994

fDate

20-25 Jun 1994

Firstpage

1425

Abstract

A new soft-switched AC/DC PWM power 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 power converter switches can fully be 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 power converter capabilities

Keywords

AC-DC power convertors; PWM power convertors; circuit testing; commutation; load (electric); network analysis; network synthesis; rectifying circuits; switching circuits; AC motor drives; AC/DC PWM power converter; PWM rectifiers; active power filters; applications; current-fed inverters; experiments; inductive load; light-load operation; magnet power supplies; magnetic energy storage; performance improvement; simulation; soft commutation process; soft switching; switches; switching sequence; AC motors; Active filters; Analog-digital conversion; Magnetic separation; Power supplies; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Rectifiers; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, PESC '94 Record., 25th Annual IEEE

Conference_Location

Taipei

Print_ISBN

0-7803-1859-5

Type

conf

DOI

10.1109/PESC.1994.373871

Filename

373871