比例电流条件下整体四磁极电磁轴承耦合分析  

Analysis of electromagnetic coupling of 4-pole integrated magnetic bearing under proportional current

作　　者：董宏林[1] 王子华[2] 段广仁[2] 魏绍义[2] 

机构地区：[1]南京理工大学计算机科学与技术学院,南京210094 [2]哈尔滨工业大学航天学院,哈尔滨150001

出　　处：《哈尔滨工业大学学报》2007年第11期1814-1817,共4页Journal of Harbin Institute of Technology

基　　金：国防基础科研资助项目(K1404060235)

摘　　要：研究整体径向电磁轴承(AMB)耦合问题.首先描述了四磁极整体径向AMB的结构特点和等效磁路模型,然后定义了相对耦合干扰系数函数的概念,并利用磁路安培定律导出其计算公式.以具体的AMB系统为背景,考虑合理的比例电流假设后,给出相对耦合干扰系数函数的曲面以及特殊位置下的曲线.分析表明针对整体式AMB系统,不仅自身自由度上存在耦合误差,还会对另一自由度产生很大干扰,因此建议径向电磁轴承应该采用分体结构.本文方法也适用于分析多磁极整体式AMB电磁耦合问题.Electromagnetic coupling 4-pole radial magnetic bearings （AMB） with integrated structure was investigated. The characteristic of 4-pole AMB and equivalent magnetic circuit was represented, subsequently, the concept of relative electromagnetic coupling error （RECE） is defined, and some formulas of calculating RECE were derived by using magnetic circuit Ampere＇ s laws. Based on actual RAMB system and in consider- ation of the postulate of the proportional current, the surface and curve of RECE function were acqu/red. The results demonstrate that not only the electromagnetic coupling exists in itself DOF, but also disturbs another DOF seriously, thus it is suggested that radial AMB with separate structure should be adopted. The method used in this paper may be used to analyze electromagnetic coupling of multi-pole magnetic AMB.

关 键 词：电磁轴承 等效磁路 气隙磁阻 电磁耦合 

分 类 号：TH133.3[机械工程—机械制造及自动化]