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.
A system model is established to analyze the dynamic performance of an integrated starter and generator （ISG） hybrid power shafting. The model couples the electromechanical coupling shaft dynamics, the bearing hydrodynamic lubrication and the engine block stiffness. The model is com- pared with the model based on ADAMS or the model neglecting the bearing hydrodynamics. The bearing eccentricity and the oil film pressure have been calculated under different hybrid conditions or at the different motor power levels. It＇ s found that the bearing hydrodynamics decreases the cal- culation results of the bearing peak load. Changes of the hybrid conditions or the motor power have no significant effect on the main bearing, but have impact on the motor bearing. A hybrid power sys- tem composed of a 1.6 L engine and a 45 kW ISG motor can operate safely.
