电动汽车电机驱动系统动力特性分析

Study on Power Performance of Traction Motor System for Electric Vehicle

分析电机驱动系统的动力特性对完成电动汽车动力传动系的参数匹配具有重要的理论意义。从整车驱动角度分析提出了电动汽车电机驱动系统的理想动力特性:低于额定转速恒转矩,高于额定转速恒功率。电机驱动系统的峰值工作特性、额定工作特性是电动汽车动力传动系参数匹配计算的主要依据。电机基速和最高转速的选择对整车的加速性能起着决定作用。提出了特性描述参数。结合某电机驱动系统动力特性的实测数据给出了分析实例。

To get well known on the power performance of traction motor system is very important and meaningful for the parameter matching design of electric vehicle power train. The ideal power characteristic for traction motor system is put forward from the vehicle driving point with constant torque drive below base speed and constant power drive above base speed. The characteristics of peak power working condition, continuous working condition provides the main basement for the electric vehicle power train design. The base speed and maximum speed of traction motor determine the acceleration performance of electric vehicle, The corresponding description parameters are put forward. One example was given based on the experiment data.