Shahed University

Reduction of Torque Ripple of Flux-Switching Permanent Magnet Machines by Modifying the Structure Zohreh Bagheri

Mohammadreza Besmi | Pouria Nadri | Zohreh Bagheri
URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=159563
Date :  2022/05/02
Publish in :    Journal of Economics and Administrative Sciences

Link :  http://www.jeasweb.org/:~:text=Journal20of20Economics20and20Administrative20Sciences20(JEAS)20is20an20international,and20practice20of20international20economic.
Keywords :Cogging torque reduction, Torque ripple reduction, Permanent magnetic machines, Flux-Switching machines, Optimization, Analytical models

Abstract :
As one of the electric machines, Flux-Switching Permanent Magnet machines (FSPMs) have been considered by many researchers. Due to the use of low flux densities and low-cost permanent magnets, these machines structurally make it easy to provide power densities similar to conventional high-energy-density PMSMs. Since the structure of flux-switching permanent magnet machines, windings, and permanent magnets are located on the machine stator, it can be considered a combination of the switched reluctance motor (SRM) and induction generators. Research shows that these machines have high power/torque density, better efficiency, and more flux attenuation than PMSM motors. On the other hand, the generated cogging torque is higher than other permanent magnet motors due to the interaction of stator permanent magnets and rotor teeth. This causes vibration, noise, and machine improper performance. The main source of torque ripples in electric machines is cogging torque. Hence, a flux-switching permanent magnet motor is designed with a low torque ripple in the present study. This study aims to reduce cogging torque by different techniques and reduce torque ripple. Necessary simulations were performed with MATLAB software, and the proposed design was optimized using the Taguchi technique. Finally, the 3D finite element method (FEM) was simulated in ANSOFT Maxwell software, and the results were discussed.