失配参数在线矫正的永磁同步电机预测电流控制

针对永磁同步电机预测电流控制模型参数失配引起的系统性能下降问题,提出一种基于内模控制观测器的应对策略来矫正模型参数.首先,根据旋转坐标系下的永磁同步电机动态模型,设计了d,q轴电流内模控制观测器并进行稳定性推导证明,观测器可以无静差估计d,q轴电流变化率,进而在线估计电机参数;然后,由卡尔曼滤波减弱参数噪声得到最优参数...

Predictive current control of permanent magnet synchronous motor based on online correction of mismatch parameters

Aiming at the problem of system performance degradation caused by parameter mismatch of model predictivecurrent control for permanent magnet synchronous motor (PMSM), a coping strategy based on internal model controlobserver is proposed to correct model parameters. Firstly, according to the dynamic model of PMSM in rotating coordinatesystem, the d-axis and q-axis current internal model control observers are designed, and the stability is deduced. It is provedthat the observer can estimate the d-axis and q-axis current change rate without static error, and the motor parameters can beestimated online. Then, the optimal parameter estimation is obtained by Kalman filtering to reduce the parameter noise, andthe mismatch parameters are updated online after the optimal parameter estimation is processed by thresholding. Finally,the proposed strategy is applied to three vector predictive current control of PMSM with mismatched parameters in steadystate and speed regulation stage. Compared with the similar methods, the experimental results show that the proposedstrategy can correct the mismatch parameters on-line and performs better in improving the current fluctuation coefficientand total harmonic distortion rate.