高频信号注入的PMSM无传感器低速运行优化控制  

Optimal control of sensorless low speed operation of PMSM based on high frequency signal injection

作　　者：谢平 包广清[1] 祁武刚 杜赫轩 XIE Ping;BAO Guang-qing;QI Wu-gang;DU He-xuan(College of Electrical and Information Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2022年第5期85-91,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51967012);甘肃省重点研发计划项目(20YF8GA055)。

摘　　要：在无位置传感器永磁同步电机(PMSM)的零低速运行控制中,多采用高频信号注入法跟踪位置信息,这将造成转矩波动和时滞问题.结合滑模速度控制和高频方波信号注入,提出一种无滤波器的转子位置辨识方法.通过将方波信号频率提升至逆变器开关频率,利用基波信号周期远小于高频注入信号周期的特点,在单次高频信号注入周期内,通过两次电流采样,避免了使用传统高频信号注入中的信号分离,同时去掉滤波器,有效提高系统收敛速度.仿真结果表明,与传统的高频信号注入法相比,该方法能实现PMSM无位置传感器控制下高精度的低速运行,且具有良好的稳态特性和动态性能.In the zero low speed operation control of sensorless permanent magnet synchronous machines(PMSM),the high frequency signal injection method is often used to track the position information,which will cause torque fluctuation and time delay.In this paper,a filter free rotor position identification method is proposed by combining sliding mode speed control and high frequency square wave signal injection.By increasing the frequency of square wave signal to the switching frequency of inverter and taking advantage of the characteristic that the fundamental wave signal cycle is far less than the high-frequency injection signal cycle,the signal separation in the traditional high-frequency signal injection is avoided through two current samples in the single high-frequency signal injection cycle.Meanwhile the filter is removed to effectively improve the system convergence speed.The simulation results show that compared with the traditional high-frequency signal injection method,the proposed method can achieve high-precision low-speed operation under sensorless control of PMSM,and has good steady-state characteristics and dynamic performance.

关 键 词：永磁同步电机 高频方波信号注入 滑模速度控制器 无位置传感器控制 

分 类 号：TM341[电气工程—电机]