[关键词]
[摘要]
针对采用永磁同步电机id=0矢量控制调速的电动汽车电机驱动控制系统,为了改善其抗负载扰动能力,并且当电动汽车处于低速运行时,能够输出大转矩,将滑模变结构控制中的变指数趋近律进行改进,设计了一种滑模速度控制器。为了减小滑模变结构控制的抖振问题,引入饱和函数来代替符号函数,同时考虑到滑模速度控制器中存在滞后问题,将饱和函数与经过积分环节后得到的信号相乘,在提高了响应速度的同时增强系统的抗扰动能力。经过仿真验证,不同负载工况下,滑模速度控制器具有较强的鲁棒性和抗扰动能力,满足电动汽车低速运行工况下输出大转矩的要求。
[Key word]
[Abstract]
Aiming at the motor drive control system of electric vehicle for using permanent magnet synchronous motor with vector control, in order to improve its capability of resisting load disturbance, and when the electric vehicle was running at low speed, it could output large torque. A sliding mode speed controller was designed to improve the exponential reaching law of sliding mode variable structure control. In order to reduce chattering of the sliding mode variable structure control, the saturation function was introduced instead of the sign function. At the same time, considering the hysteresis in sliding mode speed controller, the saturation function and the integral signal are multiplied, so that the response speed could be improved and the disturbance rejection capability could be enhanced. Simulation results showed that when the load was changed, the sliding mode speed controller had strong stability, which could made the electric vehicle output large torque at low speed.
[中图分类号]
TM 301.2
[基金项目]
国家自然基金项目(51275021);辽宁省自然科学基金指导计划项目(201602370);辽宁省教育厅科学研究一般项目(L2015229)