Distribution Characteristic and Combined Optimization of Maximum Cogging Torque of Surface-Mounted Permanent-Magnet Machines

This paper examines the maximum cogging torque (MCT) distribution characteristic of surface-mounted permanent-magnet (SMPM) machines. The MCT distributions of SMPM machines with different pole-arc coefficients and different ratios of slot opening to slot pitch are studied using: 1) the Fourier serie...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2018-03, Vol.54 (3), p.1-5
Main Authors: Ping, Jin, Shuhua, Fang, Ho, Siu-lau
Format: Article
Language:English
Subjects:
Cogging
Few slots permanent-magnet machines
Finite element analysis
Finite element method
Forging
Fourier series
Magnetism
maximum cogging torque (MCT)
Optimization
Permanent magnets
right triangle distribution
Stators
Tensile stress
Torque
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Summary:This paper examines the maximum cogging torque (MCT) distribution characteristic of surface-mounted permanent-magnet (SMPM) machines. The MCT distributions of SMPM machines with different pole-arc coefficients and different ratios of slot opening to slot pitch are studied using: 1) the Fourier series analysis together with the Maxwell stress tensor and 2) the finite-element method. Right triangle distribution regions of the optimal MCT are determined by comparing the MCT distribution contour maps obtained by the afore-mentioned two methods. Finally, a combined MCT optimization method for an SMPM with substantial savings in the optimization time, when compared with conventional methods, is proposed.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2017.2756901