摘要
针对滑模观测器中观测值存在脉动误差及由前级低通滤波器带来的相位滞后,提出一种基于单相锁相环无相移同步旋转滤波结构.首先,基于电机数学模型建立滑模观测器,分析传统同步旋转滤波器产生相位滞后的原因;其次,省去前级低通滤波器,经过dq变换滤除反电动势中的高次谐波与抖振,采用旋转坐标系下的单相锁相环计算转子位置和转速;最后,搭建Matlab/Simulink仿真模型,建立永磁同步电机无位置传感器矢量控制实验平台,对传统同步旋转滤波器和基于单相锁相环无相移旋转滤波器分别进行性能比较.仿真和实验结果表明所提方法相较于传统同步旋转滤波结构,跟踪性能更好,观测精度更高.
A zero phase shift synchronous rotary frame filter-based single-phase locked loop is proposed to overcome the harmonic ripple in the rotor position estimation of sliding mode observer and the phase lag caused by the first stage low-pass filter.Firstly,the sliding mode observer is established based on the mathematical model of the motor,and the reason for the phase lag of the traditional synchronous rotary frame filter is analyzed;Secondly,the first stage low-pass filter is omitted,and the high-order harmonics and chattering in back electromotive force are filtered by dq transformation;Finally,the Matlab/Simulink simulation model and the sensorless vector control experimental platform of permanent magnet synchronous motor are built to compare the performance of the traditional synchronous rotary filter and the zero phase shift synchronous rotary frame filter based on single-phase locked loop.Simulation and experimental results show that the proposed method has better tracking performance and higher observation accuracy than the traditional synchronous rotary frame filter structure.
作者
兰志勇
戴珊琦
李福
李延昊
罗杰
LAN Zhiyong;DAI Shanqi;LI Fu;LI Yanhao;LUO Jie(College of Automation and Electronic Information,Xiangtan University,Xiangtan 411105,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第10期60-67,共8页
Journal of Hunan University:Natural Sciences
基金
湘潭大学博士科研启动项目(22QDZ25)。
关键词
永磁同步电机
无位置传感器控制
滑模观测器
单相锁相环
无相移
同步旋转滤波器
permanent magnet synchronous motor
sensorless control
sliding mode observer
single phase locked loop
zero phase shift
synchronous reference frame filter
