Instantaneous magnetic field distribution in brushless permanent magnet DC motors. II. Armature-reaction field

Author

Zhu, Z.Q. ; Howe, David

Author_Institution

Dept. of Electron. & Electr. Eng., Sheffield Univ., UK

Volume

29

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

136

Lastpage

142

Abstract

For pt.I see ibid., vol.29, no.1, p.124-135 (1993). An analytical technique for predicting the open-circuit magnetic field distribution in the airgap/magnet region of a brushless permanent-magnet DC motor equipped with a surface mounted magnet rotor and a slotless stator was presented in Pt.I. In the present work, the analysis is extended to the prediction of the armature reaction field produced by the three-phase stator windings. As before, th motor model is formulated in polar coordinates and accounts for the large effective airgap, but it is not developed further to consider the effect of winding current harmonics on the airgap field distribution. Predicted instantaneous armature reaction field distributions are validated by a comparison with corresponding finite element calculations

Keywords

DC motors; machine theory; magnetic fields; permanent magnet motors; armature reaction field; brushless permanent magnet DC motors; finite element calculations; instantaneous magnetic field distribution; large effective airgap; motor model; polar coordinates; three-phase stator windings; Armature; Coils; DC motors; Finite element methods; Induction motors; Magnetic analysis; Magnetic fields; Magnetic flux; Permeability; Stator windings;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.195558

Filename

195558