基于滑模观测器的无位置传感器永磁同步电机矢量控制

Sensorless Vector Control of Permanent Magnet Synchronous Motor Based on Sliding-Mode Observer

永磁同步电机控制需要精确的转子位置信息来保证转矩输出的稳定型,通常采用在轴端安装位置传感器来获得位置信息,提高了产品使用和维护成本。本文基于滑模控制理论构观测器,通过对电机反电势的观测推导出转子位置并应用于坐标变换,根据观测反电势的幅值估计出转速并运用于转速闭环控制。最后,在Matlab/Simulink环境下搭建了基于滑模观测期的无位置传感器矢量控制的仿真模型,仿真结果验证了该方案的可行性与准确性。

Permanent magnet synchronous motor control needs accurate rotor position information to ensure the stbility of torque output.It usually adopts the position sensor installed at the shaft end to obtain the position information,which increases the use and maintenance cost of the product.In this paper,based on the theory of sliding mode control,the observer is constructed,the rotor position is derived from the observation of the reverse potential of the motor,and the rotor position is applied to coordinate transformation.Finally,a simulation model of sensorless vector control based on the sliding mode observation period was built in Matlab/Simulink environment,and the simulation results verified the feasibility and accuracy of the scheme.