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Design and field-weakening performance of permanent-magnet/reluctance motor with two-part rotor

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3 Author(s)
Chalmers, B.J. ; Dept. of Electr. Eng. & Electron., Manchester Univ., UK ; Akmese, R. ; Musaba, L.

A synchronous motor with two-part rotor is described whose rotor comprises a surface-magnet part and a reluctance part mounted adjacent to each other on the same axis. An axially laminated construction is used in the reluctance part to achieve a high saliency ratio. Machine parameters and physical design details are selected to obtain constant-power characteristics over a 3:1 speed range by field-weakening. Test results demonstrate the achievement of the desired characteristics, in good agreement with computed predictions. The two-part rotor construction is thus a candidate for applications such as electric vehicles

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:145 ,  Issue: 2 )