This paper proposes a traction unit that combines an interior permanent magnet motor and a PM-assisted synchronous reluctance motor for electric vehicles to improve traction performance, enhance energy efficiency, and reduce cost. The characteristics of three traction units are analyzed and compared, including (a) rear-wheel-drive configuration using one IPM motor; (b) all-wheel-drive configuration using two interior permanent magnet motors; and (c) all-wheel-drive with a combination of one interior permanent magnet motor and one PM-assisted synchronous reluctance as proposed in this paper. The operational characteristics of each motor to achieve a wide constant power speed range are first investigated. Then, the Urban Dynamometer Driving Schedule is utilized to compare and evaluate the operational characteristics, energy consumption, and most importantly, the efficiency of the traction units. Simulation results reveal that the overall efficiency of the proposed traction unit can be improved compared to the other configurations. The advantages and drawbacks of the proposed traction unit are also investigated. Finally, experiments are conducted to validate the analysis.

中文翻译：

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两种不同类型电机组合的电动汽车牵引装置运行特性分析比较


本文提出了一种将内置式永磁电机和永磁辅助同步磁阻电机相结合的电动汽车牵引装置，以改善牵引性能、提高能源效率并降低成本。分析比较了三种主机的特点，包括：（a）使用一台IPM电机的后轮驱动配置； (b) 使用两个内置永磁电机的全轮驱动配置； (c) 本文提出的由一台内置永磁电机和一台永磁辅助同步磁阻组合而成的全轮驱动。首先研究了每个电机实现宽恒功率速度范围的运行特性。然后，利用城市测功机行驶时间表来比较和评估运行特性、能耗，以及最重要的是主机的效率。仿真结果表明，与其他配置相比，所提出的牵引装置的整体效率可以得到提高。还研究了所提出的牵引装置的优点和缺点。最后，进行实验来验证分析。