表贴式永磁同步电机无位置传感器控制

位置传感器会增加系统成本和测量噪声,且无法应用在一些恶劣环境.论文在研究表贴式采磁同步电机无位置传感器的控制策略的基础上,提出一种基于反电动势的位置估计方法.利用两相旋转坐标系下电机方程的反电势形式,结合前馈控制,计算出转子位置的偏差角度,再采用锁相环结构对电机的相位和速度进行估计.在电机的低速运行阶段改进锁相环结构,保证速度估计精度,并进一步改善系统动态性能.建立了永磁同步电机的仿真模型,验证了该控制方法的可行性.在STM32F103X(ARM)为主控制器的实验平台上实现了所提出的表贴式永磁同步电机无位置传感器控制方法,实验结果表明该控制方法能够准确估计出电机的转速和转子位置,估计算法简单,系统稳态精度高、响应速度快.

Sensorless Control of the Surface PMSM

The positions sensors not only increase the cost,but also degrades the performance and reliability of the drive system in some implements.A estimation method of position detecting based on back electromotive force(EMF)is proposed according to the sensorless control strategy of surface permanent-magnet synchronous motor(SPMSM)in this paper.First,the error angle of the rotor position is calculated by using back electromotive force which in the two-phase rotating frame and the feed-forward control.Then,the speed and the rotor position of SPMSM are estimated by the phase locked loop(PLL).Besides,the structure of PLL is improved in low-speed to keep the accuracy of the estimation and dynamic performance.The simulation model is built to verify the feasibility of the control method.Finally,the proposed method is complied on an experimental platform with a controlling chip STM32F103X(ARM).The results show that the approach has good performance in motor speed and rotor position estimation,The algorithm is simple,and of high precision of steady state and fast response.