Dynamic state space model based analysis of a three-phase induction motor using nonlinear magnetization inductance

In this paper, the dynamic state space model of a three-phase induction motor with the inclusion of magnetic saturation effect is presented. Mathematical modelling is a very important tool for design and analysis of a system. In case of electrical machines, its importance becomes twofold, because of its involvement in design and control algorithms. Since more and more sophisticated control algorithms are coming forward, the accurate mathematical modelling is becoming essential. Unlike the conventional linear magnetization inductance-based models, in this paper, magnetization inductance as a nonlinear function of flux is used. Park's transformation-based equations are prepared and simulated in Matlab/Simulink environment. Different motor parameters in transient and steady state intervals are studied both under on and off load conditions.