By Topic

Salient pole shoe shapes of interior permanent magnet synchronous machines

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Steven A. Evans ; Robert Bosch GmbH, Engineering Electrical Drives (ED/EED), P.O. Box 11 63, D-77813 Bühl, Germany

This paper presents two pole shoe shapes used in interior permanent magnet (IPM) machines to produce a sinusoidal air-gap field. The first shape has an air-gap length which varies with the inverse cosine of the angle from the pole shoe middle. The second shape uses an arc with its centre offset from the origin. Although both designs are documented in the literature, no design rules exist regarding their optimum geometry for use in IPM machines. This paper corrects this by developing optimum ratios of the q-axis to d-axis air-gap lengths. The centre-offset arc design is improved by introducing flux barriers into its geometry through developing an optimum ratio of pole shoe width to permanent magnet (PM) width. Consequent pole rotors are also investigated and a third optimum ratio, the soft magnetic pole shoe angle to pole pitch, is developed. The three ratios will aid machine designers in their design work.

Published in:

Electrical Machines (ICEM), 2010 XIX International Conference on

Date of Conference:

6-8 Sept. 2010