When the dynamic mathematical model of asynchronous motor is established, it usually ignores the motor iron loss. Actually, the motor iron loss exists and it has a great influence on the performance of the motor, especially on the efficiency. A motor model considering iron loss is built in this paper and compared with the motor model ignoring iron loss by Simulink. The paper provides a practical model that has high-performance control and it is closer to the actual physical behaviour of asynchronous motors. The simulation results verify the correctness, validity and accuracy of the model and the conclusions provide a theoretical reference for the research of asynchronous motor and the efficiency optimal design of its control system.
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