Analysis of unbalanced magnetic pull in wound rotor induction machines using finite element analysis - Transient, motoring and generating modes

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Conference Proceeding
IECON Proceedings (Industrial Electronics Conference), 2013, pp. 7307 - 7312
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There has been much literature on unbalanced magnetic pull in various types of electrical machine. This can lead to bearing wear and additional vibrations in the machine. In this paper a wound rotor induction is studied. Finite element analysis studies are conducted when the rotor has 10 % rotor eccentricity. The operating conditions are varied so that transient, motoring and doubly-fed induction generator modes are studied. This allows greater understanding of the radial forces involved. Wound rotor induction machines exhibit higher unbalanced magnetic pull than cage induction machines so this is an interesting aspect of their characteristic to address. © 2013 IEEE.
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