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针对低速纯电动汽车感应电机转矩波动引起启动阶段传动系抖动的问题,在感应电机矢量控制技术的基础上深入分析了电流谐波、磁场谐波产生转矩波动的机制,建立了转矩波动的数学模型;针对转子磁链和定子电流设计了滑模控制器对转矩波动进行直接的控制,并对7.5k W的小功率动力电机进行仿真。仿真结果表明,与传统的速度滑模调节器相比,该方法能够有效地抑制低频段转矩波动,实现磁链与转矩的快速调节,明显提升了动态性能。
Aiming at the problem that the torque ripple caused by the torque ripple of induction motor in low speed pure electric vehicle causes the driveline jittering in the starting phase, the mechanism of torque ripple caused by current harmonics and magnetic field harmonics is deeply analyzed based on the vector control technique of induction motor. The torque ripple The mathematical model of the rotor flux and stator current is designed. The sliding mode controller is designed to directly control the torque ripple and simulate the low power 7.5kW power motor. The simulation results show that compared with the traditional speed sliding mode controller, this method can effectively suppress the low frequency torque ripple and achieve the fast adjustment of the flux linkage and torque, and obviously improve the dynamic performance.