永磁轮毂电机目标驱动力SVPWM柔性控制

Flexible control of SVPWM for permanent magnet hub motor with target driving force

在对永磁轮毂电机进行目标驱动力控制时,采用直接转矩控制会产生很大的转矩脉动,常规的矢量控制因控制器的高频开关信号和定子磁链圆逼近算法造成高频次的电磁转矩脉动。针对上述问题,通过分析矢量控制理论和空间矢量脉宽调制(SVPWM)算法,综合最小二乘法误差优化原理,对矢量控制系统中的SVPWM模块进行改进,设计出一种SVPWM柔性控制器。最后使用MATLAB/Simulink搭建仿真模型,在同一设定工况下,对比了直接转矩控制、常规SVPWM控制、SVPWM柔性控制的仿真效果。结果表明:SVPWM柔性控制技术优于直接转矩控制和常规SVPWM控制,降低了转矩动态变换时的脉动幅度和频次。上述方法提高了永磁轮毂电机的控制精度,具有良好的动态性能。

When the target driving force control is performed on the permanent magnet hub motor,direct torque control generates a large torque ripple.The traditional vector control causes high-frequency electromagnetic torque ripple due to the high-frequency switching signal of the controller and the stator flux circle approximation algorithm.Aiming at the above problems,by analyzing vector control theory and space vector pulse width modulation(SVPWM)algorithm,the principle of least squares error optimization was integrated,and the SVPWM module in vector control system was improved to design a SVPWM flexible controller.Finally,the simulation model was built using MATLAB/Simulink,and the simulation effects of direct torque control,conventional SVPWM control and SVPWM flexible control were compared under the same set conditions.The results show that the SVPWM flexible control technology is superior to the direct torque control and the conventional SVPWM control,which reduces the ripple amplitude and frequency during torque dynamic transformation.The method improves the control precision of the permanent magnet hub motor and has good dynamic performance.