A study on passive magnetic bearing with Halbach magnetized array

Author

Feipeng, Xu ; Tiecai, Li ; Yajing, Liu

Author_Institution

Electr. Eng. Coll., Harbin Inst. of Technol., Harbin

fYear

2008

fDate

17-20 Oct. 2008

Firstpage

417

Lastpage

420

Abstract

To improve the stiffness of permanent magnetic bearings with limited magnet material, a configuration of axial magnetic bearing with segmented Halbach array is proposed. Only radial and axial magnetization is needed, which is much easy to realize compared to ideal Halbach magnetization. Its suspension force and stiffness are studied using FEM, and some optimization is also made. The simulation results show that this kind of axial magnetic bearing with a set of given parameters has a maximal stiffness as high as 2times10⁶ N/m. Having a more complex structure compared to magnetic bearing with only entire magnet bulk, this magnetic bearing is more appropriate to the application that has a high demand for stiffness and a strict volume constraint.

Keywords

arrays; finite element analysis; magnetic bearings; magnetisation; permanent magnet machines; FEM; Halbach magnetized array; axial magnetic bearing; axial magnetization; passive magnetic bearing; permanent magnetic bearing stiffness; radial magnetization; suspension force; Costs; Magnetic fields; Magnetic flux; Magnetic levitation; Magnetic materials; Magnetization; Permanent magnets; Rotors; Stators; Superconducting magnets; Finite Element Method; Halbach magnetic field; passive magnetic bearing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-3826-6

Electronic_ISBN

978-7-5062-9221-4

Type

conf

Filename

4770731