摘要
针对基于传统滑模观测器的无位置传感器控制抖振大、低速估算性能差等缺点,在分析永磁同步电动机(PMSM)数学模型的基础上,引入了一种新型准滑模观测器进行转子位置估算。切换函数采用饱和函数代替开关函数,通过选择合适的边界层厚度,有效削弱了抖振;并将估算反电势的反馈值引入到观测器模型,通过选择合适的反馈系数,提高了转子位置估算的精度,并扩大了其低速下的适用范围。仿真和实验结果证明了该方法的可行性和有效性。
Due to the chattering problem and poor performance at low speed existed in traditional sliding mode observer,based on analyzing the mathematic model of PMSM,a novel quasi-sliding mode observer for sensorless control of PMSM was introduced.The sign function is replaced by a saturation function,a valid boundary can solve the chattering problem;the estimated back electric move force（EMF） is feedback to the state observer,a appropriate rate of feedback EMF can improve the precision of the rotor position estimation and enlarge application range at low speed.The simulative and experimental results demonstrate the feasibility and validity of the new algorithm.
出处
《电气传动》
北大核心
2010年第5期32-35,66,共5页
Electric Drive
关键词
滑模观测器
无位置传感器
永磁同步电动机
sliding-mode observer
sensorless
permanent magnet synchronous machine
