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research article

Slotless Permanent-Magnet Machines: General Analytical Magnetic Field Calculation

Pfister, P.-D.  
•
Perriard, Y.  
2011
IEEE Transactions on Magnetics

This paper presents a general analytical model for predicting the magnetic field of slotless permanent-magnet machines. The model takes into account the effect of eddy currents in conductive regions and notably in conductive permanent magnets without neglecting their remanent field. The modeling of this effect is important for the design of very high speed slotless permanent-magnet machines, as the power losses are linked with the frequency of the field. The model takes into account any number of layers. It implies that, for one, the fields can easily be calculated in a design including a permanent magnet and a conductive retaining sleeve. The model is applicable both to internal rotor and external rotor permanent-magnet machines. The effect of the relative permeability and of the conductivity of the permanent magnet or of the yoke on the magnetic fields is also taken into account. Any magnetization can be taken into account, in particular a Halbach type permanent magnet, or a radially magnetized permanent magnet can be considered.

  • Details
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Type
research article
DOI
10.1109/TMAG.2011.2113396
Web of Science ID

WOS:000291005000014

Author(s)
Pfister, P.-D.  
Perriard, Y.  
Date Issued

2011

Publisher

Institute of Electrical and Electronics Engineers

Published in
IEEE Transactions on Magnetics
Volume

47

Issue

6, Part 2

Start page

1739

End page

1752

Subjects

Analytical magnetic fields solutions

•

permanent-magnet machines

•

slotless motors

•

Eddy-Current Losses

•

Brushless Dc Motors

•

Loss Minimization

•

Excitation

•

Load

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LAI  
Available on Infoscience
July 8, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/69496
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