基于误差边界限定的永磁同步电机预测控制

针对图形边界限定形式的感应电机预测控制存在简洁、直观等优点,进一步考虑将该控制策略应用于永磁同步电机。预测控制将电机和逆变器作为一个系统整体考虑,以空间电流矢量为控制对象,直接产生逆变器的开关控制信号。基于永磁同步电机在转子磁场坐标系下的数学模型,推导出电流矢量导数的估测模型,进而预测出电流矢量的轨迹,根据最优电压矢量选择判据选定开关状态,完成基于圆形电流误差边界限定形式的永磁同步电机的预测控制算法。通过MATLAB/SIMULINK进行仿真,仿真结果证明了提出方法的有效性。

Predictive Control of PMSM Based on Limitation Form of Error Boundary

In view of the advantages of the predictive control of induction motor with graphic boundary limitation, such as simplicity and intuition, the control strategy was further considered to be applied to permanent magnet synchronous motor. Predictive control taked the motor and inverter as a whole system, taked the space current vector as the control object, and directly generated the switching control signal of the inverter. Based on the mathematical model of permanent magnet synchronous motor (PMSM) in rotor magnetic field coordinate system, the estimation model of current vector derivative was derived, and then the trajectory of current vector was predicted. According to the optimal voltage vector selection criterion, the switch state was selected, and the predictive control algorithm of PMSM Based on circular current error boundary was completed. Through MATLAB/SIMULINK simulation, the simulation results show the effectiveness of the proposed method.