NDLI: Minimum airgap-permeance data for the doubly-slotted pole structures common in variable-reluctance-motors

Content Provider	IEEE Xplore Digital Library
Author	Tormey, D.P. Torrey, D.A. Levin, P.L.
Copyright Year	1990
Description	Author affiliation: Dept. of Electr. Eng., Worcester Polytechnic Inst., MA, USA (Tormey, D.P.; Torrey, D.A.; Levin, P.L.)
Abstract	Minimum airgap-permeance data for double-salient pole structures, such as those common in variable-reluctance motors (VRMs), are presented. The data are derived from a finite-element analysis of a family of doubly salient pole structures. The ratio of the rotor interpolar arc to the stator pole arc and the ratio of the rotor pole undercut to rotor interpolar arc length are identified as the critical parameters governing minimum airgap permeance. The data are normalized to the active axial length of the motor, and are independent of the active radius of the motor. The permeance data are used to compute minimum inductance for three VRMs which have been experimentally characterized. Comparison of the computed and measured values indicates that end turn effects comprise a significant portion of the measured minimum inductance for motors with a short axial length. A second comparison is made between the data presented and the conventional flux tube analysis, indicating that the finite-element data are about as accurate as those obtained with flux tubes but are easier to implement.<>
Starting Page	196
Ending Page	200
File Size	433241
Page Count	5
File Format	PDF
ISBN	0879425539
DOI	10.1109/IAS.1990.152186
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1990-10-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Couplings Force measurement Rotors Energy conversion Stators Length measurement Finite element methods Steel Magnetic fields Inductance measurement
Content Type	Text
Resource Type	Article

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