基于三电平逆变器和模型预测的电机控制方法

Motor Control Method Based on Three-level Inverter and Model Prediction

提出一种基于NPC三电平逆变器驱动的摆臂结构伺服方法,以优化在大惯量随动系统中永磁同步电机伺服系统的控制性能。使用三电平逆变器驱动,同传统的两电平逆变器相比,减小了电流谐波。在速度环中加入模型预测控制(MPC)算法,来改善系统的动态性能。引入了扩展状态观测器来估计集中扰动,并在MPC速度控制器中添加了基于估计扰动的前馈补偿项以在强扰动的情况下保证控制稳定性。在由永磁同步电机构成的实验台上对该方案的控制效果进行了验证。

A swing arm structure servo method based on NPC three-level inverter was proposed to optimize the control performance of permanent magnet synchronous motor servo system in large inertia servo system.The three-level inverter was used to drive,the current harmonic was reduced by comparing with traditional two-level inverter.Model predictive control(MPC)algorithm was added to the speed loop to improve the dynamic performance of the system.An extended state observer(ESO)was introduced to estimate the centralized disturbance,and a feedforward compensation term based on the estimated disturbance was added to the MPC speed controller to ensure the control stability in the case of strong disturbance.The control effect of the proposed scheme was verified on the experimental platform composed of permanent magnet synchronous motor.