Applications of the current state space model in analyses of saturated induction machines

Main flux saturation in induction machines plays an important role in a number of operating regimes and therefore has to be accounted for in the process of modelling. The current state space model of a saturated induction machine has gained substantial popularity recently as an excellent tool for transient and steady-state time domain analysis of induction motor drives when the main flux saturation has to be considered. This paper discusses different applications of the model. First, the self-excitation process in single-cage and double-cage (deep-bar) induction generators is addressed. Switch-off and reclosing transients of an induction motor with capacitor reactive power compensation are dealt with next. Two inverter fed induction motor drives, namely, the current-source and resonant parallel inverter fed induction machines, are elaborated further. The last application described here is the rotor flux oriented control of an induction machine. The elaborated cases are illustrated with simulation and experimental results.