Sharif University of Technology Scientia Iranica 1026-3098 Articles in Press 2024 11 18 Permanent Magnet Design for Torque Ripple Reduction in PM-Assisted Synchronous Reluctance Motors 23744 10.24200/sci.2024.64638.9048 EN Amin Nobahari School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran 0000-0002-6941-3343 Abolfazl Vahedi School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran Moein Farhadian Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran Ali Jafer Mahdi College of Information Technology Engineering, Al-Zahraa University for Women, Karbala, Iraq Mohammed Jamal Mohammed College of Medicine, University of Al-Ameed ,University of Al-Ameed, Karbala, Iraq Journal Article 2024 06 05 To ensure the smooth and reliable operation of high performance drives it is essential to diminish the parasitic effects such as pulsating torques produced by the traction motor. Inherent large torque ripple is accordingly the well-known challenge of Synchronous Reluctance Motors (SyRMs) for such a high-performance application. This paper aims to investigate the opportunity of SyRM torque profile smoothening via inserting the Permanent Magnet (PM) materials into the rotor structure. For this purpose, the Conventional PM assisted SyRM (CPMaSyRM) rotor and a recently introduced axially segmented rotor configuration, i.e. the axial integration of a PM rotor and a SyRM rotor, will be studied. It will be shown that although the torque ripple alleviation in the CPMaSyRM design via PMs parameters optimization is too restricted, the axially segmented design is significantly capable of pulsating torque compensation. The PM material utilization, power factor, and efficiency will also be evaluated for two motors. Furthermore, a computationally efficient algorithm will be proposed for the axially segmented rotor torque profile optimization, and the effect of axial field coupling will be discussed. https://scientiairanica.sharif.edu/article_23744_a1912fede3d6e30683c4566beda75eec.pdf