Modelling and Simulation of a Novel Axial Flux Permanent Magnet Hysteresis Motor Comparing Different Disc Structures

Abstract

Conventional radial flux permanent magnet hysteresis motor has the advantages of both permanent magnet and hysteresis motor types in starting and steady states. Compared to radial flux, the structure of axial flux motor has many advantages such as high efficiency and torque in similar dimensions, adjustable air-gap and the ability to multi-stack. In this paper, a new structure of axial flux permanent magnet hysteresis motor is presented. To achieve this structure, first, different proposed structures on a disc of axial flux hysteresis motor were analysed by using the elliptical model in finite element software. The motor that has the highest torque in the similar dimensions as well as a simple structure is selected. Next, the equations of the proposed motor are presented. Then, considering the importance of the hysteresis modelling method, using the precise method of the Preisach model, finite element analysis for starting and steady states is made and the results are compared. The results show a considerable increase in the steady state torque compared to the torque of the initial hysteresis motor as well as a favourable starting torque.