Research On Interior Permanent Magnet Synchronous Motor Based on Performance Matching of Electric Bus

The interior permanent magnet (IPM) motor is commonly used as the drive motor for the electric car due to high torque density, high efficiency, and good field weakening speed regulation capabilities. In this paper, an 80kW IPM motor with uneven air gap is designed as a drive motor for an electric bus. The total weight of the electric bus is 11000 kg, and its length/width/height is 8190/2400/2960 mm, respectively. In-depth analysis and research have also been conducted on the power parameter coordination between the IPM motor and the electric bus. The operational and mechanical characteristic curves of the drive motor under a straight-line driving cycle are analyzed through simulation, and the simulation results are verified through experiments. Comparing the results of simulation and experiment, it is known that the error of the rated torque is as high as 4.8%, and the error of the peak torque is as high as 8.6%.