An analyical design approach for reducing stator iron losses in interior PM synchronous machines during flux-weakening operation

Han, S.; Soong, W.; Jahns, T.; Nondahl, T.; IEEE Industry Applications Conference. IAS Annual Meeting

An analyical design approach for reducing stator iron losses in interior PM synchronous machines during flux-weakening operation

2007

Han, S. | Soong, W. | Jahns, T. | Nondahl, T. | IEEE Industry Applications Conference. IAS Annual Meeting (42nd : 2007 : New Orleans, USA)

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.

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Seok-Hee Han Soong, W.L. and Jahns, T.M.

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