Comparison of PM brushless motors, having either all teeth or alternate teeth wound

The electromagnetic performance of three-phase permanent magnet brushless motors in which the slot and pole numbers are similar and either all the teeth or only alternate teeth carry a concentrated coil is compared. Analytical and finite element techniques are employed to predict the air-gap flux de...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 2006-03, Vol.21 (1), p.95-103
Main Authors: Ishak, D., Zhu, Z.Q., Howe, D.
Format: Article
Language:English
Subjects:
Air gaps
Brushless machine
Brushless motors
cogging torque
Coils
Electric potential
Electromagnetic forces
EMF
Finite element methods
Force measurement
Forging
inductance
Magnetic analysis
magnetic field
Mathematical analysis
permanent magnet
Permanent magnets
Teeth
Torque
Waveforms
Wounds
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Summary:The electromagnetic performance of three-phase permanent magnet brushless motors in which the slot and pole numbers are similar and either all the teeth or only alternate teeth carry a concentrated coil is compared. Analytical and finite element techniques are employed to predict the air-gap flux density distribution, the cogging torque, electromotive force (EMF) and static torque waveforms, and the winding inductances, predicted results being validated by measurements. It is shown that there is a significant difference in both the phase and line EMF waveforms, the static torque-rotor position waveforms, and the self and mutual inductances.
ISSN:0885-8969
1558-0059
DOI:10.1109/TEC.2005.853765