Title :
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
fDate :
1/1/1996 12:00:00 AM
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;
Journal_Title :
Power Electronics, IEEE Transactions on
