摘要
为了提高内置式永磁同步电机(interiorpermanent magnet synchronous motor,IPMSM)无位置传感器控制系统性能,提出一种直接基于反电动势谐波闭环控制的综合谐波抑制策略。通过高阶滑模观测器设计,有效抑制滑模抖振问题,从而能够避免低通滤波器环节,提升电机反电动势的观测准确性;同时,通过终端滑模面设计,实现观测器的有限时间收敛,提升动态响应速度。针对逆变器非线性和磁场空间谐波造成的定子电流和反电动势中6k±1次谐波,进而引发转矩脉动、损耗、噪声等问题,设计了反电动势谐波闭环控制综合谐波抑制策略,能同时实现定子电流谐波抑制和转子位置的准确观测。最后,通过18kWPMSM的实验验证所提控制策略的有效性。
In order to improve the performance of the position sensorless control for permanent magnet synchronous motor(PMSM), a comprehensive harmonic suppression strategy based on the closed-loop control of back electromotive force(EMF) harmonics was proposed. By means of the design of terminal sliding mode observer(SMO), the chattering noise inherent to SMO can be effectively suppressed, thus avoiding the low-pass filter element and improving the observation accuracy of the motor back-EMF. At the same time, through the design of terminal sliding mode surface, the converging process of the observer can be finished in finite time and the dynamic response can be improved. Due to the inverter nonlinearity and the spatial harmonics of the magnetic flux, 6 k±1 harmonics may appear in the stator currents and in the back-EMF, resulting in torque ripple, loss, and noise if without effective suppression. Aiming at the harmonic problem, a comprehensive harmonic suppression strategy based on back-EMF harmonic closed-loop control was designed, by which the harmonics in the stator current were removed, as well as the accuracy of position estimation was increased. At last, the validity of the proposed control strategy was verified experimentally on an 18 kW PMSM test rig.
作者
杨淑英
刘世园
李浩源
刘善宏
张兴
YANG Shuying;LIU Shiyuan;LI Haoyuan;LIU Shanhong;ZHANG Xing(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,Anhui Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2019年第20期6075-6084,共10页
Proceedings of the CSEE
基金
国家自然科学基金项目(51877062)~~
关键词
永磁同步电机
无位置传感器控制
谐波抑制
滑模观测器
permanent magnet synchronous motor
position sensorless control
harmonic suppression
sliding mode observer
作者简介
杨淑英(1980),男,教授,博士生导师,研究方向为风力发电系统、电驱动系统,yangsyhfah@163.com;通信作者:刘世园(1992),男,硕士,主要从事永磁同步电机无位置传感器方面研究,lsyhfut@163.com。
