Design considerations for the tooth shoe shape for high-speed permanent magnet generators

He Zhang, Xiaochen Zhang, Chris Gerada, Michael Galea, David Gerada, Jing Li

Research output: Journal PublicationArticlepeer-review

14 Citations (Scopus)


This paper presents a study of the effects that the shoe shape of the teeth of electrical machines has on the performance and losses. This is done by considering a concentrated wound, high-speed permanent magnet generator. The paper investigates the influence of the tooth shoe shape on the machine magnetic circuit and the losses distribution based on analytical and finite-element analysis (FEA). A shape coefficient Kt is proposed to provide an optimized design reference. A comprehensive analytical tool able to study the variations of the machine performance parameters is proposed. The deduced optimization function is normalized using the non-equilibrium relative weighting method, and then, it is processed via a genetic algorithm to achieve the optimized design. FEA is used to validate the proposed analytical tool and the optimum design.

Original languageEnglish
Article number7130627
JournalIEEE Transactions on Magnetics
Issue number11
Publication statusPublished - 1 Nov 2015


  • high speed electrical machine
  • optimization
  • tooth shoe

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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