Prediction of open-circuit airgap field distribution in brushless machines having an inset permanent magnet rotor topology

Author

Zhu, Z.Q. ; Howe, D. ; Xia, Z.P.

Author_Institution

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

Volume

30

Issue

1

fYear

1994

fDate

1/1/1994 12:00:00 AM

Firstpage

98

Lastpage

107

Abstract

A 2-dimensional analytical model for predicting the open-circuit airgap field distribution in radial-field brushless machines having an inset permanent magnet rotor is developed. It accounts for flux focusing and inter-pole leakage effects and arbitrary pole-arc/pole-pitch ratios, and is also applicable to machines having a surface mounted magnet rotor. Predicted results are compared with finite element analyses, and are shown to be in good agreement

Keywords

machine theory; magnetic fields; magnetic flux; magnetic leakage; permanent magnet machines; rotors; spark gaps; variable speed drives; 2D analytical model; arbitrary pole-arc/pole-pitch ratios; brushless machines; flux focusing; inset permanent magnet rotor topology; inter-pole leakage effects; magnetic field distributions; open-circuit airgap field distribution; radial-field brushless machines; surface mounted magnet rotor; variable speed drives; Brushless machines; Finite element methods; Inverters; Magnetic analysis; Magnetic flux; Optimal control; Permanent magnets; Rotors; Topology; Torque;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.272521

Filename

272521