PERFORMANCE OF MCTS IN A CURRENT-REGULATED AC AC PDM CONVERTER/

An ac/ac current-regulated pulse density modulated (PDM) converter is presented. The mos-controlled thyristor (MCT) is used in this converte r because of its promising advantages over existing power devices, A u nique bidirectional switch configuration is used, which allows the MCT to switch easily at zero voltage, The converter performance is evalua ted driving a 5-hp induction motor, MCT's switching was performed sati sfactorily, but the device fails before its ratings are reached, The M CT will be better than other devices when used in applications that re quire critical timing and high voltage blocking capability.