Abstract
This paper mainly investigates the equivalent stator slot model used in temperature field of high torque-density permanent magnet synchronous in-wheel motor. Analytical model of winding temperature shows that the conventional equivalent stator slot model has two drawbacks which increase the calculation error, especially for high torque-density motor. Based on the law of heat transfer in stator slot, a new layered winding model is put forward in this paper. The model is applicable to not only steady-state temperature field but also transient temperature field. The accuracy of this new method has been verified experimentally.
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