结合电动车辆的结构形式及其工作原理,研究了适用于电动车辆AMT(automated mechanical transmission)换挡过程的驱动电机控制策略,实现了AMT正常换挡.分析了制动状态下电机回馈制动力矩对AMT换挡的影响,提出了制动状态下AMT换挡时驱动电机控制策略.在纯电动环卫车上进行实车调试,结果表明,该控制策略可行,整个换挡时间约为1 s.
Based on analyzing the structure and working principle on electric vehicles （EVs） with dual motors coupled by planetarY gears, the control strategy of mode switching was proposed. The power interruption problem on EVs with automatic mechanical transmission （AMT） shifting was resolved. Based on the speed-torque characteristics of the planetary gears and the principle of the auxiliary motor＇ s zero speed braking, control features of mode switching were introduced. The mode shifting between the main motor mode and dual motors coupled driving were studied. Matlab/Simulink was adopted as a platform to develop the simulation model of EVs with dual motors drive system and 3 gears AMT. Simulation results demonstrated that the power interruption of dual motors drive system was solved during mode switching. The power requirements of EVs were satisfied, too.
