ABSTRACT This paper presents the dynamic and transient modelling and analysis of an axial flux hysteresis motor (AFHM) aimed at improving the low efficiency and poor power factor of conventional hysteresis motors. Although conventional hysteresis motors offer advantages such as simple structure and smooth operation, they typically suffer from low torque capability, limited efficiency and poor power factor due to magnetic losses in the core materials. To address these drawbacks, an analytical dynamic model of the AFHM is developed to investigate its behaviour under loading, unloading and starting conditions, as well as during steady‐state operation. The model is implemented in MATLAB/SIMULINK, where the hysteresis characteristics are represented by an elliptical approximation of the B–H loop, and the equivalent circuit parameters are obtained at synchronous speed. In addition, the analytical results are validated and compared with finite element method (FEM) simulations to ensure the accuracy of the proposed model. The comparison confirms close agreement in terms of stator current, electromagnetic torque and rotor speed. The results show that adjusting the supply voltage can significantly improve the efficiency, power factor and operational stability of the AFHM.
Farrokh et al. (Thu,) studied this question.