Instantaneous magnetic field distribution in permanent magnet brushless DC motors. IV. Magnetic field on load

Author

Zhu, Z.Q. ; Howe, D.

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

152

Lastpage

158

Abstract

For pt.III see ibid., vol.29, no.1, p.143-151 (1993). An analytical technique is developed for predicting the instantaneous magnetic field distribution in the airgap-permanent magnet region of radial-field topologies of brushless DC motors equipped with a surface-mounted magnet rotor and operating under any specified load condition. It accounts implicitly for the stator winding current waveform and the effect of stator slot openings. The 2-D field analysis, in polar coordinates, combines the armature reaction field component, derived from an analytical determination of the relative temporal and spatial position of the two field components. The predicted open-circuit, armature-reaction, and load field distributions all show excellent agreement with results from corresponding finite element analyses

Keywords

DC motors; machine theory; magnetic fields; permanent magnet motors; 2-D field analysis; airgap-permanent magnet region; armature reaction field component; finite element analyses; instantaneous magnetic field distribution; load field distributions; permanent magnet brushless DC motors; polar coordinates; radial-field topologies; stator slot openings; stator winding current waveform; surface-mounted magnet rotor; Armature; Brushless DC motors; Commutation; Finite element methods; Magnetic analysis; Magnetic fields; Motion control; Rotors; Stator windings; Topology;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.195560

Filename

195560