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The aim of this paper is to investigate the pole (2p) and slot (Qs) number combinations with concentrated windings to yield a minimum electromagnetic noise resulting from vibration mode order and torque variation. Preferentially, a novel method of finding possible pole and slot number combination is provided based on the new factor, i.e., Ccw called key winding factor. In addition, the relationship...
This paper presents the analytical method for analyzing the electromagnetic noise in fractional slot permanent magnet (PM) motors. The electromagnetic noise is mainly caused by the radial force and the torque variation. On load condition, the radial force density can be evaluated by integrating the open circuit magnetic and the armature reaction field using the conformal mapping and the winding function...
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