笼型切向式磁力耦合器永磁体尺寸折算及机械特性验证  

Study on size conversion and mechanical properties verification of permanent magnets in tangential magnetic coupling based on squirrel cage rotor

作　　者：葛研军[1] 贾峰[1] 石运卓[1] 温子淇[1] 

机构地区：[1]大连交通大学机械工程学院,大连116028

出　　处：《现代制造工程》2013年第10期25-28,119,共5页Modern Manufacturing Engineering

基　　金：国家自然科学基金资助项目(51375063);辽宁省科技计划项目(2010220004);大连市科技计划项目(2013A16GX109)

摘　　要：针对笼型切向式磁力耦合器设计中永磁体宽度与其充磁长度的比值过大,使永磁体径向及轴向磁性能的不均匀度和制造难度增加等缺点,基于磁能积恒定原理,提出永磁体宽度与其充磁方向尺寸的折算方法。以齿槽因数最小为目标,确定笼型切向式磁力耦合器的永磁体磁极对数。利用Maxwell二维场分析理论及其边界条件,结合Ansoft仿真环境对永磁体尺寸折算前后的磁密云图进行对比分析,并通过仿真得到机械特性曲线,验证该方法的有效性及可靠性。通过进一步分析笼型切向式磁力耦合器的电流曲线及瞬时电流云图,证明了其与电励磁异步电动机运行机理一致。As the ratio is too large about the size of a permanent magnet width and its magnetizing direction in a tangential mag- netic coupling, the magnetic properties are not uniform and the process of making magnets is difficult. In order to solve the defects above-mentioned, a size conversion method of increasing the size of width and decreasing the size of magnetizing direction is put forward by using the principle of constant magnetic energy. A cogging factor which can minimize the cogging torque is used for se- lecting suitable pole pairs. To verify the method, the flux density distribution chart based on Maxwell two-dimensional field analy- sis theory and its boundary conditions is obtained in Ansoft simulation environment to compare the effect about before-and-after the size conversion. From the mechanical property curves, the operation mechanism of the coupling is almost the same as the asyn- chronous motor, and further proved the method is efficient and reliable.

关 键 词：切向式磁力耦合器 尺寸折算 齿槽因数 机械特性 

分 类 号：TH132[机械工程—机械制造及自动化]