电动汽车稀土永磁电动机驱动系统

RARE-EARTH PERMANENT MAGNET MACHINE SYSTEM OF ELECTRIC VEHICLE

为满足电动汽车驱动要求,研制出以稀土永磁电动机及其控制技术为核心的一种电动汽车动力驱动系统,在电动汽车上应用一种全新的牵引电动机自动控制模式。与此电动机相匹配研制出一种结构简单、性能匹配优良的线控两挡行星齿轮变速器。就电动机驱动系统力矩特性对电动汽车纵向舒适性的影响进行初步分析。在自动弱磁的控制策略下,续流增磁稀土永磁电动机系统可以满足电动汽车对驱动系统的要求。电动机与两挡变速箱匹配,可保证驱动系统工作效率在全车速范围内稳定在较高水平。

In order to reach the driving request of electric vehicle（EV）, the EV power-driven system is researched, which takes rare-earth permanent magnet machine as key technology. A bran-new automatic control mode of traction motor is researched and applied in the EVs. At the same time a kind of planetary gear transmission case is designed, which has simple structure and excellent characteristics. Otherwise it is controlled by wire. And the influences on EV longitudinal amenity are analyzed, which are from the moment characteristics of the motor driving system. By the strategy of automatic weakmagnetism control, the motor system can fit all the need for driven system of EV. Matching the motor with double shifts, guarantee the drive system work efficiency on a high level when the EV is in the max speed.