高温超导磁悬浮径向轴承悬浮特性分析

The levitation analysis of high temperature superconducting magnetic radical bearing

高温超导磁悬浮轴承凭借无源自稳定的优良特性,在飞轮储能系统中拥有巨大的应用潜能,其主要结构由高温超导定子和永磁转子组成。而轴承的悬浮特性直接决定飞轮转子的设计和飞轮储能系统的容量大小。本文基于磁通冻结镜像法的思想,对高温超导径向磁悬浮轴承的悬浮特性进行分析,并对轴承轴向/径向悬浮力和刚度参数进行计算。结果表明:轴承的悬浮力和刚度随着初始径向位置、径向位移和轴向位移的变化而变化;在相同的位移条件和研究的位移范围内,径向悬浮力/刚度皆大于轴向的情况,且两者相差约一个数量级。

The high temperature superconducting magnetic bearing （HTSMB） has great potential applications in the flywheel energy storage system （FESS） due to its passive levitation characteristics and it consists of superconducting stator and permeant magnetic rotor. The levitation characteristics of HTSMB determines the energy storage capacity and design of flywheel rotor of FESS. Hence, this paper analysed the levitation property of HTSMB based on frozen - flux image method and the levitation force and stiffness of HTSMB were calculated. And the results verify that levitation force and stiffness are corresponding to the initial cooling position, radical and vertical displacement. The values of radical parameters are much more than its vertical counterparts.