Miniaturized magnetoelastic torque transducers

Author

Garshelis, Ivan J. ; Jones, Christopher A.

Author_Institution

Magnova Inc., Pittsfield, MA, USA

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3649

Lastpage

3651

Abstract

Torque transducers based on circumferentially polarized band technology are shown to be scalable downward to accommodate torque measurements to at least low mN·m ranges. Shaft diameter for any required torque range is determined by material strength, while band width and separation are selected primarily to meet specific field detector requirements. Experiments verify the theoretically based expectation that the fields arising with the application of torque to property scaled mini-shafts are of similar intensity to those from larger shafts. A torque transducer of simple construction with a 0.79 mm diameter alloy steel shaft having a coercivity greater than 60 Oe, together with Hall effect field detectors exhibits suitable characteristics for torque measurement in the ±25 mN·m range

Keywords

Hall effect transducers; coercive force; magnetoelastic effects; polarisation; torque measurement; 0.79 mm; Hall effect field detectors; alloy steel shaft; bandwidth; circumferentially polarized band technology; coercivity; field detector requirements; magnetoelastic torque transducers; miniaturized torque transducers; scalable transducers; scaled mini-shafts; shaft diameter; torque measurement; Coercive force; Detectors; Iron alloys; Magnetic materials; Magnetic separation; Polarization; Shafts; Steel; Torque measurement; Transducers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800619

Filename

800619