摘要
永磁无刷直流电机是多变量、强耦合的非线性系统,为进一步深入研究无位置BLDCM控制方法,以解决估算转子位置以及传统滑模观测器的抖振等问题,提出基于改进型滑模观测器的无位置BLDCM控制方法,引入正弦函数的[-π/2,π/2]部分作为滑模观测器的控制函数,以削弱抖振;同时构建反电动势观测器直接提取反电动势信号,并利用李雅普诺夫理论证明其稳定性,引入CORDIC算法以获取电机转子位置和转速。仿真实验结果表明,该控制策略能够准确估计电机转子位置,同时削弱观测器的抖振问题,提高系统精度和可靠性。
Brushless DC motor（BLDCM） is a muhivariable nonlinear control system with strong coupling. This paper studies the sensorless control method of BLDCM by weakening the chattering problem of the traditional sliding mode observer and by estimating the position accurately,and proposes a BLDCM sensorless control based on the improved sliding mode observer for estimating the motor rotor position and speed. The sine function is used to weaken the chattering problem, and to build an electromotive force observer for extracting the electromotive force signal directly. At the same time the Lyapunov theory is used to prove the stability of the algorithm. The coordinate rotation digital computer algorithm is introduced to estimate the position and speed of the rotor accurately. Simulation and experimental results demonstrate that the control strategy can accurately estimate the position and speed of the rotor and weaken the chattering problem of the observer.
出处
《江南大学学报（自然科学版）》
CAS
2015年第3期278-282,共5页
Joural of Jiangnan University (Natural Science Edition)
基金
国家自然科学基金项目(51405198)
中央高校基本科研业务费专项基金项目(JUSRP11464)
江苏省自然科学基金项目(BK20130159)
