摘要
针对永磁同步电机无速度传感器控制系统,设计了新的滑模观测器进行转子位置和速度的观测。在通常滑模电流观测器基础上引入反电势估测值,构造了新滑模观测器,采用Sigmoid函数代替常数切换函数在一定程度上减小抖振,采用变截止频率低通滤波器,代替常用低通滤波器,使电机相位补偿是一个常数。通过李亚普诺夫稳定性定理证明了设计的滑模变结构观测器的渐进稳定性。通过仿真和实验验证了设计的滑模控制器,证实了其有效性和可行性。
A novel sliding mode observer （SMO） was presented for sensorless control of permanent magnet synchronous machines （PMSM）. Compared to conventional sliding mode observers, one new current model of the observer by using estimated back EMF was proposed, and sigmoid function was used to weaken the chattering problem, a new low-pass filter which cut-off frequency vary with the input signal frequency to substitute for conventional low-pass filter, phase compensation was simplified.The asymptotically stability was got by lyapunov stability theory.Simulation and experimental results are provided to verify its feasibility and effectiveness.
出处
《电气传动》
北大核心
2014年第3期3-7,共5页
Electric Drive
基金
国家自然科学基金(51177137)
中央高校专项资金资助(SWJTU12BR015)
关键词
永磁同步电机
滑模观测器
SIGMOID函数
permanent magnet synchronous motor（PMSM）
sliding mode observer
sigmoid function
