Average modeling of a hexagon transformer and rectifier

This paper describes the development of an average model of a hexagon transformer and rectifier (hex t/r) system. The average model is derived in the dq0 rotating reference frame. A technique for representing the commutation inductance located on the DC side of the rectifier is also presented. Parameter estimation is incorporated in the average model through the use of polynomial fits. The use of the average model reduces computation time by a factor of 5. Experimental results of an 11 kVA hex t/r prototype are provided to verify the validity of the model.