A novel soft-switched PWM current source inverter with voltage clamped circuit

This paper develops a new series resonant (current resonant) de link invert er with a voltage clamped circuit. The proposed circuit has a fixed pulse f requency operation. The fixed pulse frequency at 20-50 kHz enables the syst em to work without audible noise, and to involve the much small-sized de in ductance and output capacitors compared with hard-switched current source i nverters. The proposed circuit has a voltage clamped circuit which could co ntrol the voltage stress of the switches, In this paper, explanations of th e new circuit configuration, the simulation, design considerations, and som e experimental results are included.