Ja. Pomilio et al., PERFORMANCE IMPROVEMENT OF SOFT-SWITCHED PWM RECTIFIERS WITH INDUCTIVE LOAD, IEEE transactions on power electronics, 12(1), 1997, pp. 153-160
A new soft-switched ac/dc pulse width modulation (PWM) converter struc
ture is presented, It is useful for current-fed inverters and PWM rect
ifiers, Typical applications are magnet power supplies, high-power ac
motor drives, and active power filters with magnetic energy storage, S
oft switching is provided at the expense of a limited increase of the
circuit complexity as compared to usual hard-switching solutions, A di
scussion of the soft commutation process is presented, By a proper swi
tching sequence, overvoltages across the converter switches can fully
be eliminated, Moreover, light-load operation can be achieved, Both ty
pical limitations of soft-switched current-fed topologies are therefor
e overcome. Simulation and experimental results demonstrate the actual
converter capabilities.