Abstract

To reduce cost and improve efficiency, a novel design concept of a traction motor for electric vehicle based on a driving cycle is proposed. In comparison with conventional design method of electric motors, the proposed design concept considers the real load condition and highlights special requirements of electric vehicle. Based on the proposed approach, an interior permanent magnet traction motor is designed with high average efficiency overall operation region. The thermal behavior of the designed traction motor is investigated and the temperature distribution in key parts under the driving cycle is obtained. To verify validity and generality of the proposed designed concept, a surface mount permanent magnet traction motor is designed and evaluated by experiment.

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