Shape optimization of closed slot type permanent magnet motors for cogging torque reduction using evolution strategy

1997 ◽  
Vol 33 (2) ◽  
pp. 1912-1915 ◽  
Author(s):  
Jang-Sung Chun ◽  
Hyun-Kyo Jung ◽  
Joong-Suk Yoon
Keyword(s):  
Shape Optimization ◽  
Permanent Magnet ◽  
Evolution Strategy ◽  
Permanent Magnet Motors ◽  
Cogging Torque

Optimization of Magnets Shape for Cogging Torque Reduction in Axial-Flux Permanent Magnet Motors

2021 ◽  
pp. 1-1
Author(s):  
Vicente Simon-Sempere ◽  
Auxiliadora Simon-Gomez ◽  
Manuel Burgos ◽  
Jose-Ramon Cerquides-Bueno
Keyword(s):  
Permanent Magnet ◽  
Permanent Magnet Motors ◽  
Axial Flux ◽  
Cogging Torque

scholarly journals Analysis of Torque Ripple and Cogging Torque Reduction in Electric Vehicle Traction Platform Applying Rotor Notched Design

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3053 ◽  
Author(s):  
Myeong-Hwan Hwang ◽  
Hae-Sol Lee ◽  
Hyun-Rok Cha
Keyword(s):  
Permanent Magnet ◽  
Torque Ripple ◽  
Field Analysis ◽  
Permanent Magnet Motors ◽  
Primary Methods ◽  
Cogging Torque ◽  
Electric Cars ◽  
Electric Control ◽  
Interior Permanent Magnet ◽  
Rotor Shape

Drive motors, which are used in the drive modules of electric cars, are interior permanent magnet motors. These motors tend to have high cogging torque and torque ripple, which leads to the generation of high vibration and noise. Several studies have attempted to determine methods of reducing the cogging torque and torque ripple in interior permanent magnet motors. The primary methods of reducing the cogging torque involve either electric control or mechanical means. Herein, the authors focused on a mechanical method to reduce the cogging torque and torque ripple. Although various methods of reducing vibration and noise mechanically exist, there is no widely-known comparative analyses on reducing the vibration and noise by designing a notched rotor shape. Therefore, this paper proposes a method of reducing vibration and noise mechanically by designing a notched rotor shape. In the comparative analysis performed herein, the motor stator and rotor were set to be the same size, and electromagnetic field analysis was performed to determine a notch shape that is suitable for the rotor and that generates reasonable vibration and noise.

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