Browse Publications Technical Papers 2018-01-0456
2018-04-03

Simulation and Comparative Analysis of Permanent Magnet Motor for Electric Vehicle with Different Rotor Structures 2018-01-0456

As one of the key technologies for EVs and HEVs, the design of their motors has been researched extensively, and some novel rotors of permanent magnet motor were proposed in order to improve torque capability, including average torque and torque ripple. Rotor structure selection of drive motor for various electric vehicles has been one of the key issues in matching of electric vehicle power system.
Three motors are analyzed for providing visible insights to the contribution of different rotor structures to the torque characteristics, efficiency and extended speed range. First, an iterative comparative analysis of torque-speed characteristics with different flux linkage, d-axis inductance and rotor saliency ratio is performed for demonstrating the design principle. Then, the three motors are optimized by a genetic algorithm (GA) for further improving the torque characteristics. Third, a particular comparative analysis is performed among the flat one type, V type and triangle type 48/8 IPM motors, which is very important for the selection of electric vehicle driving motors.

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