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

Bishal Silwal; Paavo Rasilo; Antero Arkkio

doi:10.1109/TMAG.2017.2772167

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

Bishal Silwal, Paavo Rasilo, Antero Arkkio

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Abstract

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.

Original language	English
Pages (from-to)	8100708
Journal	IEEE Transactions on Magnetics
Volume	54
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2017.2772167
Publication status	Published - 2018
Publication type	A1 Journal article-refereed

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10.1109/TMAG.2017.2772167

Silwal2017b
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http://urn.fi/URN:NBN:fi:tty-201801291171

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abstract = "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{\textquoteright}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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AU - Rasilo, Paavo

AU - Arkkio, Antero

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AB - 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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ER -

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

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