Current clamped, modified series resonant DC-link power converter for a general purpose induction motor drive

S.G. Abeyratne, T.A. Lipo, Y. Murai, J. Horikawa
Proceedings of 1994 IEEE Applied Power Electronics Conference and Exposition - ASPEC'94  
A new ac/ac power converter topology, in which all the switches operate in a resonant fashion to reduce switching losses, is proposed. The topology enables conduction-period control of individual current pulses, whereby pulse-width modulation (PWM) could be achieved to a fair degree of accuracy with the associated controller. The scheme implements current peak (resonant) limiting by a simple diode clamp. Improved switch utilization (voltage 2 current) and reduced part-count could be cited as
more » ... ould be cited as the merits of the circuit over the previous soft-switched current-sourced ac/ac configurations. It is experimentally verified that the output PWM controller could be used to implement constant V/F operation, and the results are presented. In-depth design criteria for the topology that gives optimized voltage stresses are presented. A charge-based, line current feed-forward, mode-controller is introduced at the input and digitally verified. Feasibility of the simultaneous control over both input powerfactor and smooth input-output line currents are studied and the digital verification is presented. Index Terms-Current source, dc link, motor drive, pulse width modulation (PWM), resonant. Sunil Gamini Abeyratne was born in Kandy, Sri-Lanka, on December 17, 1960. He received the B.Sc.(Eng.) degree in electrical and electronics engineering from the University of Peradeniya, Sri-Lanka, in 1987, and the M.S.E.E degree from the Gifu University, Gifu, Japan, in 1992. He was with the
doi:10.1109/apec.1994.316389 fatcat:glga3tmr2feipgzrvrlxv5rvie