摘要
电磁轴承位置传感器安装的偏差或转子静态载荷的作用使得轴颈的几何中心相对轴承中心产生偏心,即轴承静态工作点相对理想对中位置发生偏移。对此,该文首先讨论了永磁偏置磁轴承(PMEB)静态工作点偏移对轴承动特性的影响,然后在进一步考虑电磁轴承磁力饱和约束的基础上,提出了永磁偏置磁轴承综合动刚度的定义,最后通过分析永磁偏置磁轴承静态工作点偏移以及轴承偏置磁场对轴承稳定性的影响,得出了永磁偏置磁轴承的稳定域,从而为轴承的设计和分析提供了理论依据。
Because of the mounting errors of position sensors or the influence of static loads, a eccentricity exits between the journal and the bearing center, namely the static working point of the bearing will excursion. So in this paper, the effects of the static working point on the dynamic characteristics of bearing are discussed first. After further considering the restrict of magnetic force saturation, the synthetical dynamic stiffness of permanent magnet biased magnetic bearing(PMEB) is defined for the first time. At last, the steady region of the PMEB is presented by analyzing the effects of the the static working point and the bias magnetic field on the bearing stability, which provides the theoretics basis for the design and analysis of PMEB.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2005年第5期122-125,共4页
Proceedings of the CSEE
基金
国家自然科学基金项目(50275116)
国家 863 高技术基金项目(AA414060)。~~
关键词
电磁轴承
永磁偏置
动特性
偏心
几何中心
磁力
载荷
转子
位置传感器
饱和
Electric machinery
PMEB(Permanent magnet biased magnetic bearing)
Static working point
Dynamic characteristics
Steady region
Synthetical dynamic stiffness
