摘要
针对传统滑模观测器由于符号函数在零点处的不连续导致系统发生高频抖振现象,并且引入低通滤波器将获取的不连续反电动势估计值转变为连续反电动势估计值的过程中,产生了一定的相位延迟现象,提出了一种改进的滑模观测器,将新型饱和函数代替符号函数的基础上,同时引入双低通滤波器补偿策略补偿相位延迟造成的角度误差。在Matlab/Simulink中搭建模型进行仿真分析并通过试验台试验验证,结果表明以上改进提高了电机中高速下的转子位置和速度的估算精度,改进后的估计值较传统算法得到的估计值更加接近实际值。改进的滑模观测器提高了永磁同步电机无位置传感器控制系统的性能。
Traditional sliding mode observer causes high-frequency chattering phenomenon in the system owing to the discontinuity of sign function at zero point,and introduces a low-pass filter to convert the obtained discontinuous back electromotive force estimation value into a continuous back electromotive force estimation value with a certain phase delay phenomenon.Aiming at the above phenomena,this paper proposed a type of improved sliding mode observer.Based on the saturation function instead of symbol function,the double low-pass filter compensation strategy was introduced to compensate the angular error caused by phase delay.The model was built in Matlab/Simulink for simulation analysis and verified by bench test.The results show that the above improvement increases the estimation accuracy of rotor position and speed,and the improved estimation value is closer to the true value than the estimated value obtained by traditional algorithm.It can be seen that the improved sliding mode observer improves the performance of the position sensorless control system of permanent magnet synchronous motor.
作者
王琳
李军伟
马彦
阚辉玉
孙宾宾
高松
王冬
WANG Lin;LI Junwei;MA Yan;KAN Huiyu;SUN Binbin;GAO Song;WANG Dong(School of Traffic and Vehicle Engineering, Shandong University of Technology, Zibo 255049, China;Beijing Qianqin Technology Co., Ltd, Beijing 100190, China)
出处
《太原理工大学学报》
CAS
北大核心
2020年第1期112-117,共6页
Journal of Taiyuan University of Technology
基金
国家自然科学基金资助项目(51805301)
国家重点研发计划项目(2016YFD0701101)
关键词
永磁同步电机
滑模观测器
双滤波器补偿
仿真分析
试验验证
permanent magnet synchronous motor
sliding mode observer
dual filter compensation
simulation analysis
test verification
