改进STSMO的PMSM无传感器直接转矩控制系统
PMSM Sensorless Direct Torque Control System with Improved STSMO
吕德刚 1纪堂龙 1姜国威1
作者信息
- 1. 哈尔滨理工大学 电大型电机电气与传热技术国家地方联合工程研究中心,哈尔滨 150080
- 折叠
摘要
为提高滑模观测器转子位置观测精度,抑制抖振频发,提出了一种基于超螺旋滑模观测器(STSMO)的双重滤波直接转矩(DTC)控制方法.传统滑模观测器为了提取连续的扩展反电动势估计值,通常需要外加一个低通滤波器滤除高频信号,采用STSMO来提取反电动势,在低通滤波器前提下增加了卡尔曼滤波器,形成双重滤波结构,进一步滤除噪声和干扰信号,减小估算反电动势中的纹波,同时用饱和函数替代原有的符号函数以减小抖振.实验和仿真结果证明,改进STSMO控制系统能有效抑制系统抖振,具有更好的控制精度和稳态品质.
Abstract
In order to improve the observation accuracy of the rotor position of the sliding mode observer and suppress the frequent chattering,a double-filtered direct torque(DTC)control method based on the Super-Twisting sliding mode observer(STSMO)was proposed.In order to extract the continuous estimated value of the back EMF,the traditional sliding mode observer usually needs to add a low-pass filter to filter out high-frequency signals.In this paper,STSMO is used to extract the back EMF,and the Kalman filter is added under the premise of the low-pass filter.A double filter structure is formed,which further filters out noise and interference signals,reduces the ripple in the estimated back EMF,and replaces the original sign function with a saturation function to reduce chattering.The experimental and simulation results show that the improved STSMO control system can effectively suppress the system chattering,and has better control accuracy and steady-state quality.
关键词
直接转矩控制/超螺旋算法/滑模观测器/卡尔曼滤波器Key words
direct torque control/super-twisting mode observer/sliding mode observer/Kalman filter引用本文复制引用
出版年
2024
NETL
NSTL
万方数据