Investigation of the effects of design parameters on output characteristics of capacitive angular displacement sensors by finite element field modelling

Author

Khan, S.H. ; Finkelstein, L. ; Abdullah, F.

Author_Institution

Dept. of Electr. Electron. & Inf. Eng., City Univ., London, UK

Volume

33

Issue

2

fYear

1997

fDate

3/1/1997 12:00:00 AM

Firstpage

2081

Lastpage

2084

Abstract

The effects of design parameters on performance characteristics of a capacitive angular displacement sensor used in limited angle torque motors are investigated. This is done by 2D finite element modelling and computation of electrostatic fields in the complex geometry of the sensor. Results are presented in terms of sensor´s output characteristic showing the effects of some of its material and geometric parameters. The output characteristic investigated is the variation of sensor output voltage V with angular position θ of the motor rotor, V=f(θ). The design parameters used comprise permittivities of various dielectric materials and angular width w₁ of the sensor

Keywords

angular measurement; dielectric materials; electric fields; electric motors; electric sensing devices; electrostatics; finite element analysis; permittivity; rotors; spatial variables measurement; torque motors; 2D FEM; angular position; capacitive angular displacement sensors; design parameters; dielectric material permittivities; electrostatic fields; finite element field modelling; limited angle torque motors; motor rotor; output characteristic; output characteristics; sensor geometry; sensor output voltage; Capacitive sensors; Computational geometry; Computational modeling; Dielectric materials; Electrostatics; Finite element methods; Sensor phenomena and characterization; Solid modeling; Torque; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.582728

Filename

582728