Performances of AC induction motors with different number of poles in urban electric cars

This paper presents the results of a study on the effect of the number of poles of AC induction motors (IM) on their performance in both propulsion and regenerative brake modes in eco-urban electric cars (EC). Since changing the number of poles affects the maximum motor speed, different transmission ratios are considered in modelling of the powertrain system. Two speed profiles, namely, normal and aggressive, are used in this study. Both profiles are based on the field data of a route in Kayseri-Turkey. For each configuration the total consumed energy of the EC is found. Results show that IM with 4 poles performs better than other configurations with respect to the cost and energy efficiency.