Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/21641
Title: Analytical prediction of cogging torque in surface-mounted permanent-magnet motors
Authors: Lin, D
Ho, SL 
Fu, WN 
Keywords: Analytical field solution
Cogging torque
Conformal transformation
Permanent-magnet machine
Issue Date: 2009
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on magnetics, 2009, v. 45, no. 9, 5208505, p. 3296-3302 How to cite?
Journal: IEEE transactions on magnetics 
Abstract: We present a new approach to computing cogging torque based on only one analytical field solution in surface-mounted permanent-magnet (PM) motors. We use conformal transformation to compute the magnetic field created by the permanent magnets in the air gap with a single slot. Then, we derive the cogging torque due to the single-slot effect at different rotor positions directly from the 2-D analytical field solution. The total cogging torque is synthesized from the contribution of each slot. We have applied our approach to predicting the cogging torque of two surface-mounted PM motors, one with 4 poles, 24 slots and the other with 42 poles, 36 slots. The predicted cogging torques for both applications agree well with those obtained from 2-D finite-element analysis.
URI: http://hdl.handle.net/10397/21641
ISSN: 0018-9464
EISSN: 1941-0069
DOI: 10.1109/TMAG.2009.2022398
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