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Reduction of cogging torque in interior-magnet brushless machines \ud

By Z.Q. Zhu, S. Ruangsinchaiwanich, N. Schofield and D. Howe

Abstract

An investigation into the cogging torque in a four-pole interior-magnet brushless machines having either a six-slot stator and a short-pitched nonoverlapping winding or a 12-slot stator and a full-pitched overlapping winding is described. It is shown by finite-element analyses and measurements that, by appropriately defining the pole-arc to pole-pitch ratio, the optimal pole-arc to pole-pitch ratio for minimum cogging torque, which has been derived for surface-mounted magnet machines, is equally applicable to interior-magnet machines

Year: 2003
OAI identifier: oai:eprints.whiterose.ac.uk:869

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