Switched reluctance motors (SRM) are attracting much attention because of their special advantages. Generated heat by losses can reduce the life time of SRM. Therefore, optimal design based on thermal modeling helps to improve their performance and increases their life time. In this paper, a lumped thermal model of SRM based on the analogue of conductive and convective thermal resistances is proposed. On the other hand, using fans or blowers on motors cause some technical and economical problems. Therefore, an innovative design is proposed in which the rotor itself operates as an axial fan and reduces the temperature rises within the motor. ّFinally the stator dimensions are optimized using obtained thermal model.
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