大型天文望远镜方位轴电机转子位置检测  

Rotor Position Detection of the Motor for Large Astronomical Telescope Azimuth Axis

作　　者：宋晓莉[1,2] 汪达兴[1,2] 张超[1,2] 

机构地区：[1]中国科学院国家天文台南京天文光学技术研究所,南京210042 [2]中国科学院天文光学技术重点实验室,南京210042

出　　处：《微特电机》2016年第7期48-50,55,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(11303065)

摘　　要：大型天文望远镜实时跟踪目标星体,方位轴电机位置检测是其重要一环。针对其复杂机械结构及精密光学装置的特点,采用拼接弧线永磁同步电动机对大型望远镜方位轴进行直接驱动,采用带距离编码的光电编码器检测拼接弧线永磁同步电动机转子位置,设计了编码器处理电路,采用长线接收/驱动器对编码器信号进行处理,然后根据带距离编码的编码器特点实时计算方位轴电机转子位置。实验表明对超低速运行的大型天文望远镜,高精度的光电编码器可以根据转子的磁极对数选择相应的参考点数应用到拼接式弧线电机进行电机转子磁极位置检测,简化转子位置计算,节约控制的计算速度。可达到快速、准确、简单检测方位轴转子磁极位置的目的。The detection of azimuth axis motor＇s rotor position is very important to track the target object for the large astronomical telescope. According to the characteristic of the complex mechanical structure and precision optical device of the telescope,the direct drive through segmented arc permanent magnet synchronous motor is adopted to drive the large astronomical telescope; the rotor position of the segmented arc permanent magnet synchronous motor was measured by the photoelectric encoder with distance encoding. First,the processing circuit of encoder was designed,then the signals mining with long term receiver/driver was deal t and the real- time rotor position were calculated based on the features of the encoder. Experiments show that the high precision photoelectric encoder can be applied to the rotor position of the segmented motor and achieve ultra- low speed of the large astronomical telescope. The encoder can be selected to fit the pole pairs of the segmented arc motor. It can simplify the process of calculation and achieve faster,more accurate and easier to detect the rotor position for large astronomical telescope.

关 键 词：编码器 拼接弧线电机 望远镜 位置检测 

分 类 号：TM341[电气工程—电机] TM351