直驱抽油机用圆筒型磁通切换电动机特性分析  

Characteristic analysis of tubular flux switching permanent magnet motor for direct drive pumping unit

作　　者：汪旭东[1] 位锋威 许孝卓[1] 封海潮[1] 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454000

出　　处：《江苏大学学报（自然科学版）》2016年第3期315-320,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61074095);教育部高校博士点基金资助项目(20114116110003);河南省重点科技攻关项目(122102210121);河南省教育厅自然科学研究项目(13A470337);河南省产学研项目(122107000010)

摘　　要：针对现有抽油机系统存在传动环节多、结构复杂以及效率低下等问题,提出了一种直线电动机直接驱动的抽油机系统,该系统的主要特点是采用直接平衡的方式,并采用圆筒型磁通切换电动机.初步设计了直线电动机直接驱动的抽油机的总体结构,分析了圆筒型磁通切换电动机的工作原理;给出了电动机的主要尺寸,并采用有限元方法对其磁场分布、气隙磁密、永磁磁链、空载反电动势、电感及推力等电磁性能进行了分析,采用添加辅助齿的方法优化了电动机磁阻力.结果表明,圆筒型磁通切换电动机反电动势趋近于正弦波,其谐波分量仅占基波分量的3%,在直线抽油机系统中具有很好的应用前景.To solve the problems of many transmission links,complex structure and low efficiency,a project of direct drive pumping unit by liner machine was proposed. The method of direct balance and the tubular flux switching permanent magnet motor were adopted in the system. The overall structure of the pumping unit was designed,and the working principle of the tubular flux switching motor was analyzed.The main dimension of the motor was given. Based on finite element method,the electromagnetic performance parameters of magnetic field distribution,air gap flux density,permanent magnet flux linkage,no-load back EMF,inductance and thrust were investigated. The detent force of tubular flux switching motor was optimized by adding auxiliary teeth. The results show that the motor has the characteristics of more sinusoidal back EMF,and the harmonic component accounts for only 3% of fundamental component. The tubular flux switching permanent magnet motor is suitable especially for the applications in pumping system.

关 键 词：直驱抽油机 直接平衡 磁通切换 有限元 静态特性 

分 类 号：TM359.4[电气工程—电机]