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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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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Ho, Siu-lau
description 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.
doi_str_mv 10.1109/TMAG.2017.2756901
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source IEEE Electronic Library (IEL) Journals
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
title Distribution Characteristic and Combined Optimization of Maximum Cogging Torque of Surface-Mounted Permanent-Magnet Machines
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