采用Halbach磁场的新型被动磁轴承仿真  

Simulation of new type of passive magnetic bearing using Halbach magnetic field

作　　者：徐飞鹏[1] 李铁才[1] 

机构地区：[1]哈尔滨工业大学电气工程系,黑龙江哈尔滨150001

出　　处：《电机与控制学报》2007年第5期538-541,共4页Electric Machines and Control

摘　　要：为了提高永磁磁轴承的轴向承载力和刚度,在对理想Halbach磁场进行分析的基础上,利用分段磁环构成的近似Halbach磁场设计了一个新型的轴向永磁磁轴承。通过有限元软件对这种磁轴承进行了建模仿真,计算了最大承载力以及刚度,并分析了磁环的厚度与高度比值对磁轴承刚度的影响。仿真结果表明,采用Halbach磁场的轴向磁轴承最大可以提供2×106N/m的刚度,高于相同永磁材料用量条件下传统轴向磁轴承的刚度。考虑到这种磁轴承的结构要比传统结构复杂,因此这种磁轴承更适合在对刚度要求高的场合应用。To improve the axial stiffness of permanent magnetic bearings, a new type of axial magnetic bearing with segmented Halbach array is proposed. Its magnetic force and stiffness are both calculated using a FEM（finite element method） software, and the variation of the stiffness with the variation of the ratio between the magnetic bearing thickness and height is also analyzed. The simulation results show that this kind of axial magnetic bearing with a set of given parameters has the stiffness as high as 2×10^6N/m. Considering the more complex structure, this new type magnetic bearing is more appropriate to the application that has a high demand for stiffness.

关 键 词：有限元 Halbach磁场 被动磁轴承 

分 类 号：TM153[电气工程—电工理论与新技术]