Abstract
Abstract Permanent magnet motors have been used recently for many application thanks to high efficiency, high reliability, high power and torque density. However, these motors are vulnerable to demagnetization. This phenomenon reduces motor power and torque density. In this paper, an improved algorithm that considers only the flux density in the direction of magnetization is presented. Then an irreversible demagnetization in the Ring Winding Axial Flux Permanent Magnet (RWAFPM) motor is conducted during normal operating condition. Also, the effect of different factors such as temperature, armature reaction and self-demagnetization is investigated using Finite Element Method. In addition demagnetization tolerant of the motor at the various temperature conditions is carried out. Finally, using the Time Stepping Finite Element Method (TSFEM), the electromagnetic torque of the motor is calculated.
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