An improved analytical dynamic modeling of hysteresis motor

Dynamic modeling of hysteresis motors is essential to predict of the transient performance, studying the dynamic stability and development of modern closed-loop control and estimation strategies. This paper develops a new analytic dynamic modeling for a high-speed, circumferential-flux type hysteresis motor in dq reference frame, The parameters of the equivalent circuit of hysteresis rotor material are adjusted based on operational B-H loop. For this purpose and based on elliptical assumption for B-H loops, the hysteresis lag angle β is updated due to the applied stator voltage and available load torque. Developed mathematical model satisfies many theoretical aspects of hysteresis motor behavior in transient and steady-state situations. Some simulations are provided to demonstrate the validity of developed model in Matlab/Simulink.