Modeling of VSI fed induction motor-a systematic and general approach

For the investigation of AC motor drives, either in simulation or in control, an appropriate mathematical model is required. The modeling approach of integration of a motor-inverter system is proposed in the paper. With the topological graph of the inverter circuit and the primitive connection matrix and the transmission matrix of the graph, the restraint equations and the output equations of the circuit are deduced. The paper derives retrograded equations, when phase currents discontinue, to replace the basic equations of the induction motors. On these bases, universal equations with real number matrices and Boolean matrices, a hybrid is built up, whose application range is of a great generality