摘要
针对内插式永磁同步电动机(IPMSM)的凸极性,推导出其在两相静止坐标系下基于扩展反电动势(EEMF)的数学模型,在此基础上构造一种新型滑模观测器(SMO)用于实现无位置传感器矢量控制。该观测器引入估算扩展反电动势反馈,分析了反馈系数对观测器稳定性及扩展反电动势估计准确性的影响,提出一种反馈增益系数的自适应算法,拓展了滑模观测器在低速段的观测范围。为了削弱系统抖振的影响、提高观测值的精度,采用一种可变边界层厚度的饱和函数替代传统观测器中的符号函数,并基于锁相环(PLL)方法提取转子位置和速度信息。搭建基于新型滑模观测器的IPMSM无位置传感器矢量控制平台,实验验证了该观测器在低速段估算转子位置和速度的有效性。该控制方法具有调速范围宽、鲁棒性强等特点且算法简单、易于实现。
The mathematical model based on extended electro motive force （EEMF） for interior permanent magnet synchronous motor （IPMSM） considering saliency was deduced under two phase static coordinate system. Based on this, a novel sliding mode observer （SMO） was proposed to realize speed sensorless vector control. This observer introducing estimate EEMF feedback to expand the observation range in the low speed and an adaptive algorithm of the back electro motive force was proposed after analyzing the feedback coefficients on the impact of observer stability and the estimated value of expand EMF. In order to weaken the influence of chattering, a variable boundary layer of saturated function was designed to replace symbol function in traditional observers. Phase locked loop （PLL） method was used to extract the rotor position and speed information. A platform based on novel sliding mode observer for IPMSM was built to validate the effectiveness of rotor position and speed estimation at low speed. This control method has a wide range of speed regulation, and robustness and the algorithm is simple and easy to realize.
出处
《电气传动》
北大核心
2013年第5期11-15,共5页
Electric Drive
关键词
内插式永磁同步电动机
滑模观测器
变边界层
锁相环
无位置传感器控制
interior permanent- magnet synchronous motor （IPMSM）
sliding mode observer（SMO）
variableboundary layer
phase-locked loop（PLL）
position sensodess control
