一种低成本的线性霍尔位置检测方法研究  

Low-cost motor position detection method by linear Hall-effect sensors

作　　者：刘晓[1] 叶云岳[1] 郑灼[1] 卢琴芬[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第7期1204-1207,共4页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(50607016)

摘　　要：为降低直线伺服系统的成本,提出了利用两个安装位置相差90°电角度的低成本线性霍尔元件检测电机位置的方法,对霍尔元件的安装位置进行了研究.采用有限元法对有铁芯和无铁芯两种结构的圆筒型永磁直线电机的气隙磁场进行了分析,通过对两个分析结果的比较,确定了铁芯影响气隙磁场的区域范围,分析了霍尔元件安装位置对电机位置检测精度的影响.在不同的霍尔元件安装位置条件下,进行了电机位置检测实验,实验结果与有限元分析结果吻合,确定了霍尔元件合适的安装位置.研究结果表明,通过选择合适的霍尔元件安装位置,可以提高该位置检测方法的检测精度.The method of motor position detection by two low-cost linear Hall-effect sensors mounted 90° electrically apart was proposed to reduce the cost of linear servo system. The magnetic fields of the motors with and without back iron structure were analyzed by finite element analysis （FEA）. The area influenced by back iron was determined by comparing the analysis of the two motors, and the influence of the sensor mounting positions to the motor detection accuracy was analyzed. The experiments of the motor position detecting were conducted while the sensors were mounted on different positions. Experimental results proved the analysis by FEA, and the suitable sensor mounting positions were determined. The detection accuracy of the method can be increased by choosing suitable sensor mounting positions.

关 键 词：永磁直线同步电机 线性霍尔元件 位置检测 

分 类 号：TM359.4[电气工程—电机]