纯电动汽车变速器传动比区间优化

Transmission Ratio Interval Optimization for Electric Vehicle

针对纯电动汽车传统传动比优化所得结果为确定值,而变速器齿轮配齿所得传动比往往偏离该确定值的问题,根据某典型行驶工况,在整车参数已定的情况下,对驱动电机进行匹配选择。以传动比为变量,结合两参数换挡规律,提出一种传动比区间优化方法。优化结果表明,该方法所得传动比的最大可行区间既能解决齿轮配齿问题,又能使电机驱动系统工作在高效区。

In connection with the problem that the transmission ratio optimized by traditional optimization method was often different from the real value decided by gear teeth matching,according to a typical running cycle and in the case of parameters of electric vehicle were set,the drive motor was matched.Taking the transmission ratio as a variable,combining with the two parameters shift schedule,an interval optimization method was established finally.The results show that the maximum feasible interval of the transmission ratio obtained from proposed method can solve the matching problem of gear teeth and make the motor drive system working in the high efficiency areas.