永磁同步电机无传感器变结构矢量控制

A Novel Sensorless Vector Control Method Based on Variable Structure Sliding Mode Control for Interior Permanent Magnet Synchronous Motor(IPMSM)

针对电机控制中采用的PI调节器对电机参数变化及外加干扰时鲁棒差和无位置传感器控制实现困难等问题,在研究常规永磁同步电机矢量控制策略的基础上,将滑模变结构控制(VSSMC)和无迹卡尔曼滤波(UKF)引入该策略中,用VSSMC分别替代策略中速度PI控制器和2个PI电流控制器,同时利用UKF对电机定子直轴电流、交轴电流、负载转矩、转子位置和转速进行实时估计,提出了一种新颖的基于VSSMC和UKF的永磁同步电机无传感器矢量控制方案。仿真结果验证了新方案的正确性,所设计的VSSMC能有效调节转速和电流,其调节效果优于常规PI控制器,所设计的UKF观测器能准确估计系统状态,而且两者对系统参数摄动、外干扰、测量误差以及测量噪声都具有极强鲁棒性,系统的动、静态性能明显增强。

Aim.To solve the problems that sensorless vector control is difficult to implement and that the parameters of normal PI(proportional integral) control cannot be adjusted on-line in the conventional motor control,we propose a novel control method.Sections 2 and 3 of the full paper explain in some detail our novel control method. Its core consists of:(1) we design a variable structure sliding-mode speed controller and a variable structure sliding -mode current controller to replace the traditional speed PI co...