一种考虑死区的PMSM无速度传感器滑模辨识及控制

本文设计了一种基于旋转坐标系自适应滑模观测器并考虑死区补偿的转速和转子位置估算方法。为了解决传统估算方法导致的抖振问题,引进了近似滑模Sigmoid函数,提高了系统的可靠性。采用Lyapunov函数对角速度进行辨识,保证了系统稳定,取消了数字锁相环,使得算法变得更加简单。针对逆变器死区对估计模型的影响,引入了一种坐标变换补偿法的死区补偿算法到自适应滑模观测器控制中,消除了实际电机和模型电机之间的相位误差。仿真和实验结果表明,所提出的算法具有较强的鲁棒性,加快了系统的响应速度。

Sensorless Sliding Mode Identification and Control of Permanent Magnet Synchronous Motor Considering Dead-Time

A new speed and rotor position estimation method by adaptive SMO based on rotating coordinate system considering dead-time is designed. To solve the chattering problem caused by the traditional estimation method, the approximate sliding mode Sigmoid function is introduced to improve the reliability of the system. The Lyapunov function is used to identify the angular velocity, which ensures the stability of the system, and cancellation of the digital phase locked loop makes the algorithm simple. Considering the influence of dead time on the estimation model, a dead time compensation algorithm based on coordinate transformation is introduced to the adaptive sliding mode observer(SMO), which can remove the phase error between actual motor and model motor. Simulation and experimental results show that the proposed algorithm has strong robustness and speeds up the response of the system.