考虑系统扰动的永磁同步电机复合控制策略

Composite Control Strategy of Permanent Magnet Synchronous Motor Considering System Disturbance

提出一种结合滑模速度控制和扩展滑模扰动观测器的永磁同步电机复合控制策略。滑模速度控制采用新型趋近律设计,扩展滑模扰动观测器对系统内部参数摄动以及外部负载干扰进行准确估计。所设计的复合控制器通过系统扰动估计环节对控制系统中的综合扰动项进行实时估计,用以对速度控制环节进行前馈补偿,实现控制系统自抗扰控制。试验结果验证了所提出控制策略的有效性和可行性。

A composite control strategy of permanent magnet synchronous motor combined with sliding mode speed control and extended sliding mode disturbance observer was proposed. The new approximation law design was adopted by the sliding mode speed control,and the extended sliding mode disturbance observer could accurately estimate the inner parameters perturbation and external load interference. The real-time estimation of the integrated disturbance items in the control system through the system disturbance estimation link was realized,then the estimated value was used to do the feedforward compensation for the speed control link,and the active disturbance rejection control of the system was realized. The experimental results verify the validity and feasibility of the proposed control strategy.