Simplified model of induction machine with electrical rotor asymmetry

In this paper, a simplified two-axis model for induction machines with electrical rotor faults is derived. The model is intended for analysis of the impact of rotor fault on control loop with inverter fed induction machines, therefore detailed modeling of internal states of the machine is not required. The model is derived from unified theory of electrical machines, where rotor parameters are asymmetrical. The assumptions made during the development of the model are confirmed by experimental measurements. Finally, the comparison between proposed simplified model and detailed induction machine model is performed. The comparison shows very good agreement between simplified and detailed induction machine model, thus making the proposed model suitable for simulations of rotor faults.