Application of fringing range method to micromagnetic bearing actuator design

Author

Qin, Lijiang ; Zmood, Ronald B.

Author_Institution

Dept. of Electr. Eng., R. Melbourne Inst. of Technol., Vic., Australia

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3833

Lastpage

3845

Abstract

The fringing range method developed earlier for two-dimensional problems is extended in this paper to three-dimensional cases and is used for analyzing a micromagnetic bearing actuator. Expressions for the air-gap permeances, as well as forces and torques, are derived that are suitable for parametric analysis of the actuator design. With this approach, the air-gap permeances are also used in the magnetic circuit for calculating the air-gap magnetomotive forces, thus, allowing the development of a systematic procedure for magnetic bearing analysis and design. A design example is given to illustrate the application of the present approach

Keywords

electromagnetic actuators; feedback; magnetic bearings; magnetic circuits; magnetic forces; microactuators; torque; 3D problems; active control; air-gap magnetomotive forces; air-gap permeances; feedback control system; fringing range method; magnetic circuit; mean displacement; micromachine; micromagnetic bearing actuator design; parametric analysis; pole angles; torque; Actuators; Air gaps; Feedback control; Friction; Magnetic analysis; Magnetic forces; Magnetic levitation; Micromagnetics; Parametric study; Shafts;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908394

Filename

908394