In order to reasonably adjust the speed and torque of the transmission loading control,overcome the influence of une-ven excitation current,and ensure stable driving of distributed drive electric vehicles,a transmission loading control technology based on a dual closed-loop control model is studied.According to the operating mechanism,the loading of the gearbox is controlled by a synchronous motor.Therefore,a dual closed-loop control model is designed:the outer loop uses fractional order PIαDβ The control-ler adjusts the speed and adjusts the motor speed based on the speed deviation;The inner loop adopts an improved fuzzy PI controller to control the excitation current.Due to the linear relationship between the excitation current and torque,adjusting the excitation cur-rent can control the torque of the synchronous motor,achieving balanced regulation of speed,excitation current,and torque.Experi-mental results have shown that this technology performs excellently in the loading control of electric vehicle transmissions,effectively regulating speed and torque,and improving driving stability by optimizing excitation current.The driving wheel slip rate of the vehicle only reaches a peak of 0.15％in the initial control stage,and stabilizes at 0％in the later stage.
关键词
分布式驱动/电动汽车/变速器加载控制/双闭环控制/模糊PI控制器/分数阶PIαDβ控制器
Key words
distributed drive/electric vehicles/transmission loading control/double closed-loop control/fuzzy PI controller/fractional order PIαDβ controller
维普
万方数据