Modeling of Broken Rotor Bar Fault of Induction Motor in Virtual Simulation Experiment

In response to the lack of faulty induction motor modeling in simulation software, an induction motor model with broken rotor bars (BRB) fault was designed for virtual simulation experiment. Based on the principle of rotor winding reduction, the resistance matrix of the fault rotor was derived given the characteristics that BRB fault mainly causes the variation of rotor winding resistance, and the mathematical model of the motor with BRB fault was built. Then the model was realized and verified by Simulink software and actual faulty motor. Results showed that the proposed model accurately simulated not only common physical quantities such as current and speed, but also physical quantities such as electromagnetic torque and air gap flux that are difficult to detect. On the basis of the model and the original object platform, the teaching process featuring ‘virtual and real combination’ of relevant practical training courses was designed. The development and application of the faulty motor modeling have facilitated practical teaching.