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Computation of torque of an electrical machine with different types of finite element mesh in the air gap

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Article number8105909
JournalIEEE Transactions on Magnetics
Issue number12
Publication statusPublished - 1 Dec 2014
Publication typeA1 Journal article-refereed


In the numerical analysis of electrical machines, accurate computation of the electromagnetic torque is desired. Maxwell stress tensor method and Coulomb's method are the most commonly used methods for computing torque numerically. However, several other methods have also been developed and are being used. These methods are observed to have several accuracy issues related to the finite element discretization used in the air gap of the machine. In this paper, the effect of various finite element meshes in the air gap of the machine and the effect of the shape of the elements used to compute the torque are studied and discussed. This paper carefully compares the torques obtained from a direct method and a method based on the power balance of the machine.


  • Electromagnetic torque, energy balance, finite element method, induction machine, mesh