文档介绍：基于等价输入干扰估计器的永磁同步电机
无速度传感器控制*
纪志成,常军
(江南大学电气自动化研究所无锡 214122)
摘要:提出了一种新型的采用等价输入干扰估计器的永磁同步电机控制系统结构,其控制器采用PI控制方法,估计器采用状态观测器与低通滤波器的组合,在此结构下控制器与估计器的设计满足分离原理。为实时估计电机转速,根据定子侧测量的电压、电流值,基于扩展卡尔曼滤波方法(EKF)设计了电机的转速估计器。仿真结果表明在较宽的速度给定范围内,估计器有较高的估算精度,控制器能很好地抑制未知干扰,提高了永磁同步电机的性能。最后通过dSPACE实验验证了该方法的有效性。
关键词:永磁同步电机;等价输入干扰;扩展卡尔曼滤波;直接反馈线性化;dSPACE
中图分类号:TM33 文献标识码:A 国家标准学科分类代码:
Speed-sensorless control of PMSM based on an improved equivalent
input disturbance estimator
Ji Zhicheng, Chang Jun
(Institute of Electrical Automation, Jiangnan University, Wuxi 214122, China)
Abstract:A novel drive system for the permanent synchronous motor (PMSM) is proposed. In this system, A PI controller is adopted as the main control unit. An equivalent input disturbance estimator was designed, bines a state observer and a low-pass filter. The controller and estimator satisfy the separation principle by using the presented estimator. Meanwhile, an extended Kalman filter (EKF) estimator is used to estimate the rotor speed of the PMSM according to the measured stator current and stator voltage. Simulation results show that the control system using the proposed equivalent input disturbance estimator can achieve good performance and good speed estimation in a wide range. In addition, the controller can suppress unknown disturbance, improve the performance of PMSM. Finally the dSPACE experiment results ve