电磁推力轴承刚度非线性的研究  

Study on Non-Linearity of Stiffness of Magnetic Thrust Bearing

作　　者：王澄泓[1] 汪希平[1] 吴明贵[1] 

机构地区：[1]上海大学机电工程及自动化学院,上海200072

出　　处：《机械科学与技术》2005年第9期1058-1061,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家863高新技术研究发展计划(2001AA423310)资助

摘　　要：分别用电磁力理论公式和整体模型的有限元方法计算分析了电磁推力轴承的位置刚度和电流刚度随推力盘偏移量x的变化规律及影响因素。结果表明,电磁推力轴承的位置刚度和电流刚度存在着强烈的位移非线性现象,转轴漏磁和材料磁饱和影响了非线性关系的变化趋势。用有限元分析可以得出与实际情况更为符合的刚度曲线,从而为设计电磁轴承的控制系统提供更可靠的依据。The change rule and effect factors of the position stiffness and current stiffness of magnetic thrust bearing with displacement of thrust collar are calculated and analyzed by theoretical formulae and finite element method（FEM）. The resuhs indicate that the stiffness of magnetic thrust bearing have strong non-linearity with displacement. The flux leakage in the shaft and the magnetic saturation influence the trend of non-linearity of stiffness. A more practical stiffness-displacement relationship is achieved with finite element method. It can provide more reliable basis for control system design of magnetic bearing.

关 键 词：电磁推力轴承 位置刚度 电流刚度 非线性 有限元法 

分 类 号：TH133.3[机械工程—机械制造及自动化]