Extending Carter Factor to Slot Openings Equipped With Semimagnetic Slot Wedges | IEEE Journals & Magazine | IEEE Xplore

Extending Carter Factor to Slot Openings Equipped With Semimagnetic Slot Wedges


Abstract:

Statorslotting increases the equivalent air gap as Frederick William Cater pointed out already in 1901. Since then, the Carter factor has provided a solution to the probl...Show More

Abstract:

Statorslotting increases the equivalent air gap as Frederick William Cater pointed out already in 1901. Since then, the Carter factor has provided a solution to the problem of analytically calculating the decrease in magnetic flux density under an electrical machine slot opening. Nowadays, semimagnetic wedges (SMWs) are often used to close the stator slots and to smooth the flux density behavior on the rotor surface. SMWs also partly compensate for the slotting-caused decrease in the magnetic flux making the equivalent air gap length shorter than in the case without SMWs. However, the original Carter factor does not take into account the effect of SMWs and should, therefore, be extended. This study offers a solution for extending the original Carter factor to calculate the equivalent slot opening in the presence of SMWs.
Published in: IEEE Transactions on Energy Conversion ( Early Access )
Page(s): 1 - 4
Date of Publication: 13 January 2025

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Department of Electrical Engineering, LUT University, Lappeenranta, Finland
Department of Information Technology, LUT University, Lappeenranta, Finland
Department of Electrical Engineering, LUT University, Lappeenranta, Finland

Department of Electrical Engineering, LUT University, Lappeenranta, Finland
Department of Information Technology, LUT University, Lappeenranta, Finland
Department of Electrical Engineering, LUT University, Lappeenranta, Finland