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Electric Power Components and Systems Volume 39, 2011 - Issue 14
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Original Articles

A Novel Technique for the Computation of Inductances of Salient Pole Machines under Different Eccentricity Conditions

H. Akbari Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
,
J. Milimonfared Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
&
H. Meshgin Kelk Department of Electrical Engineering, Tafresh University, Tafresh, Iran
Pages 1507-1522 | Received 31 Dec 2010, Accepted 06 May 2011, Published online: 07 Oct 2011
 
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Abstract

In this article, comprehensive analytical equations are developed to compute time-varying inductances of salient pole machines with any eccentricity type and degree in a unified technique. For this purpose, the inverse air-gap function of the eccentric salient pole machine has been defined, and its indefinite integral has then been determined. The derived analytical expressions, unlike the previous proposals, take into account all the harmonics of the inverse of the air-gap function without any development in Fourier series. The presented method eliminates the need for inexact analytical equations, numerical differentiations, and huge lookup tables, which are common in the modified winding function approach. Theoretical fundamentals and experimental results that validate the proposed technique are presented.

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