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An Analytical Design Approach for Reducing Stator Iron Losses in Interior PM Synchronous Machines During Flux-Weakening Operation

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3 Author(s)
Seok-Hee Han ; Univ. of Wisconsin - Madison, Madison ; Soong, W.L. ; Jahns, T.M.

Interior permanent magnet (IPM) synchronous machines are vulnerable to generating unacceptably large stator iron losses during flux-weakening operation at elevated speeds. The purpose of this paper is to present a new analytical design approach to reduce the stator iron losses in IPM machines with multiple flux barriers during flux-weakening operation. The proposed technique achieves this objective by: (1) designing the rotor to minimize the total harmonic distortion (THD) of the spatial distribution of the rotor scalar magnetic potential (mmf); and (2) coupling the rotor with an appropriate stator configuration to suppress undesirable higher-order harmonics in the stator as much as possible. An analytical design method is presented to synthesize the "minimum-THD" rotor with multiple flux barriers. Finite element analysis is used to demonstrate that the application of this design technique can lead to a substantial reduction of the stator iron losses during flux-weakening operation.

Published in:

Industry Applications Conference, 2007. 42nd IAS Annual Meeting. Conference Record of the 2007 IEEE

Date of Conference:

23-27 Sept. 2007

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