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Prospects and Limitations of Power Balance Approach for Studying Forces and Electromagnetic Damping in Electrical Machines

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Original languageEnglish
Pages (from-to)8100708
JournalIEEE Transactions on Magnetics
Issue number2
Publication statusPublished - 2018
Publication typeA1 Journal article-refereed


A cage induction machine with dynamic rotor eccentricity is considered. In general, force and torque computations in the finite-element analysis of electrical machines are done using conventional direct methods. Many methods have been put forward with a claim to be more accurate than one another. In this paper, we assess the accuracy of the typical force computation method used in the finite-element analysis of electrical machines, for various types of mesh used in the machine’s air gap during simulations. The possibility of using the power balance of the machine to validate the force calculation and alternatively calculate the force is discussed. Besides, its applicability to study the electromagnetic damping of mechanical vibrations due to unbalanced magnetic pull is presented.

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