Novel magnetic spring and magnetic bearing

Author

Qian, Kun-Xi ; Zeng, Pei ; Ru, Wei-Min ; Yuan, Hai-Yu

Author_Institution

Inst. of Biomed. Eng., Jiangsu Univ., Zhenjiang, China

Volume

39

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

559

Lastpage

561

Abstract

We describe a magnetic spring consisting of two magnetic rings with different dimensions, located concentrically in the same direction of magnetization. One of the two magnetic rings is fixed and the other can move axially. Because of the magnetic field, the two magnetic rings tend to keep away from each other at a fixed axial distance. If the relative positions of the two magnetic rings are changed, a restoring force, namely, an elastic force, is produced. This antipull/antipush phenomenon is quite similar to the elastic force in a metal spring. Our measurements demonstrate that the relation of elasticity and the displacement is quite linear and the elastic force is about 100 times the weight of the magnetic rings. The magnetic spring can also be used as a magnetic bearing, if one magnetic ring is fixed and the other rotates. We describe a magnetic spring train and magnetic bearing kilowatt-hour meter as examples of applications.

Keywords

magnetic bearings; magnetoelastic effects; permanent magnets; watthour meters; antipull/antipush phenomenon; concentrically located magnetic rings; elastic force; fixed axial distance; linear elasticity displacement relation; magnetic bearing; magnetic bearing kilowatt-hour meter; magnetic spring; magnetic spring train; permanent magnetic ring; restoring force; Displacement measurement; Elasticity; Force measurement; Magnetic fields; Magnetic flux; Magnetic levitation; Magnetic materials; Magnetization; Magnetoelasticity; Springs;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.806524

Filename

1179918