Design and development of a permanent magnet torquer for a gyroscope

Author

Rajagopal, K.R.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Technol., New Delhi, India

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

2630

Lastpage

2633

Abstract

In this paper, the computer aided design and development of an efficient PM torquer used in a Gyroscope is presented. The initial design using the conventional method has been analyzed and tuned using the 2-D and 3-D finite element (FE) models of the torquer. The radial magnet configuration, with two working airgaps and also with PM rings on both sides of the airgap, is found to be the optimum, owing to maximum coil utilization, increased flux density, minimum leakage flux and low coil-inductance. Samarium cobalt is used as the PM material as it makes the torquer very compact even with larger airgaps. Test results of the developed PM torquer having a scale-factor of 173.3°/hour/mA, match fairly with the computed values

Keywords

CAD; finite element analysis; gyroscopes; magnetic sensors; permanent magnets; torque; PM ring; Sm-Co; airgap; coil inductance; computer aided design; dynamically tuned gyroscope; finite element model; inertial sensor; leakage flux; magnetic flux density; permanent magnet torquer; radial magnet; samarium-cobalt alloy; scale factor; Cobalt; Coils; Finite element methods; Gyroscopes; Magnetic analysis; Magnetic flux; Magnetic materials; Permanent magnets; Samarium; Testing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951257

Filename

951257