Two switch auxiliary quasi-resonant DC link three-phase PWM inverter and two switch auxiliary resonant commutated pole link three-phase PWM rectifier

In this paper, the soft switching technique of 3-phase voltage source PWM converters and rectifiers has been picked up for the effective solution to solve these problems. The main purposes on the soft switching technology developments are to minimize the switching losses of switching power devices as well as to reduce the electrical dynamic voltage and current stresses by operation under principle of zero voltage soft switching (ZVS) and zero current soft switching (ZCS) schemes. Also, a new conceptual circuit configuration of 3-phase voltage source soft switching AC-DC-AC converter using IGBT module, which has one ARCPL circuit and one ARDCL circuit, is presented. Furthermore, the proposed 3-phase voltage source soft switching AC-DC-AC power conversion system needs no additional sensor for complete soft switching as compared with the conventional 3-phase voltage source AC-DC-AC power conversion system. The operating performances of proposed soft switching AC-DC- AC converter treated here are evaluated on the basis of experimental results in 50 KVA setup in this paper.