Analysis of a quasi-resonant circuit for soft-switched inverters

Author

Hui, S.Y.R. ; Gogani, Ebrahim S. ; Zhang, Jian

Author_Institution

Dept. of Electr. Eng., Sydney Univ., NSW, Australia

Volume

11

Issue

1

fYear

1996

fDate

1/1/1996 12:00:00 AM

Firstpage

106

Lastpage

114

Abstract

This paper presents an analysis of a quasi-resonant circuit for soft-switched inverters. The quasi-resonant circuit provides zero-voltage instants for zero-voltage inverter switching by pulling down the DC link voltage momentarily to zero without increasing the peak value of the nominal DC link voltage. Switches in the quasi-resonant circuit can also be turned off at zero current/voltage conditions. The proposed circuit allows creation of zero voltage conditions for inverter soft-switching under loaded and no-load conditions. The operating principle of this circuit is explained, and the analysis of each operating mode is described. Design criteria for achieving zero voltage switching are derived from the general mathematical analysis. Operation of the circuit has been verified by PSPICE simulation and experiments

Keywords

DC-AC power convertors; SPICE; circuit analysis computing; invertors; resonant power convertors; switching circuits; DC link voltage; PSPICE simulation; loaded conditions; mathematical analysis; no-load conditions; operating principle; quasi-resonant circuit; soft-switched inverters; soft-switching; zero current switching; zero-voltage instants; zero-voltage inverter switching; Circuit topology; Frequency; Pulse width modulation; Pulse width modulation inverters; RLC circuits; Resonance; Resonant inverters; Switching circuits; Switching loss; Zero voltage switching;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.484423

Filename

484423