径向电磁轴承气隙磁阻近似计算方法分析  

ANALYSIS ON APPROXIMATE COMPUTATION OF GAP RELUCTANCE IN RADIAL ACTIVE MAGNETIC BEARINGS

作　　者：董宏林[1] 闫颖鑫[2] 王科俊 段广仁[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：《机械工程学报》2007年第8期43-47,共5页Journal of Mechanical Engineering

基　　金：国防基础科研基金(K1404060325)

摘　　要：利用同一个径向电磁轴承模型,将线性近似计算、积分型计算与有限元计算三种方法进行比较,结果表明积分型计算方法是有效的,尤其在工作间隙相对比较小时,积分型方法计算磁阻所产生的相对误差明显小于近似计算所产生的相对误差。此外,从绝对误差和相对误差两个方面分析线性近似计算气隙磁阻的精度,并给出具有三阶代数精度的磁阻计算公式。积分型计算磁阻的方法不但提高等效磁路分析精度,同时还为磁浮系统的分析提供一种微元化方法。Based on a same model of the radial magnetic bearing, the integral computation is compared with linear approximate computation and the finite element method. The results indicate that integral computational method is feasible, especially when the gap is very small relatively, the relative error of gap reluctance produced in integral method is obviously smaller than that produced in the linear approximate calculation. In addition, the precision of linear approximate calculation is discussed from two aspects of absolute error and relative error, and the formula with three-order algebra precision is put forward. Not only precision of equivalent magnetic circuit can be improved by integral computation of gap reluctance, but also a differential method can be provided for analyzing magnetic suspension system.

关 键 词：电磁轴承 气隙磁阻 磁通 有限元法 

分 类 号：TH133.3[机械工程—机械制造及自动化]