Active Auxiliary Resonant Commutation Bridge Leg Snubber-Assisted Three Phase Voltage Source Soft Switching PFC Rectifier with Digital Control Scheme

This paper presents performance evaluations of active auxiliary resonant commutation bridge-leg snubber-assisted three-phase voltage source soft switching PFC rectifier using IGBTs which can operate under a principle of Zero Voltage Switching (ZVS). This three-phase PWM rectifier implements a digital control scheme based on instantaneous power feedback control strategy. This soft-switching PWM rectifier power is more suitable and acceptable for high power applications as compared with the other types of resonant snubber-assisted soft switching PFC rectifiers. The operating performances of the three.phase PFC.PWM rectifier are illustrated and evaluated on the basis of simulational and experimental results.