Title :
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
fDate :
3/1/1997 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
