基于NESO的永磁同步电机无位置传感器控制

Sensorless control of PMSM based on nonlinear extended state observer

摘要:

由于使用高分辨率的机械传感器会增加永磁同步电机(PMSM)的体积和成本，降低系统的可靠性，因此在电机控制领域引入了无位置传感器控制技术。根据扩张状态观测器的理论，设计了非线性扩张状态观测器(NESO)来观测PMSM的反电动势，实现对电机转子速度和位置的估计，并通过分区分析和Lyapunov理论分析了观测器的收敛性。最后，通过对观测器的仿真实验，验证了NESO能够对系统的转速和位置实现较好的跟踪，并且具有很好的鲁棒性。

Abstract:

The installation of high precision mechanical sensor will increases the volume weight and cost of permanent magnet synchronous motor (PMSM) and reduces the reliability of the system. Therefore, the technology of sensorless control is introduced the field of motor control. Based on the theory of extended state observer, a nonlinear extended state observer (NESO) is proposed to observe the back-EMF of PMSM. The information of rotor speed and position can be calculated by estimating the back-EMF. Then, the convergence of observer is analyzed by partition analysis and Lyapunov theory. Finally, simulation results prove that NESO can achieve good observing performance of the system speed and position. Moreover, the NESO has a better robustness.