An Axial Airgap Eddy Current Speed Sensor
Typ dokumentu
článek v časopisejournal article
Peer-reviewed
acceptedVersion
Autor
Mirzaei M.
Grim V.
Ripka P.
Práva
openAccessMetadata
Zobrazit celý záznamAbstrakt
This paper presents a novel configuration of
the eddy current speed sensor to measure the rotating
speed of iron rods and shafts up to 3000 rpm. The proposed
eddy current speed sensor has an axial airgap structure
with one excitation coil and two antiserially connected pick
up coils. The speed sensor is mounted in the end shaft part
region. Different solid iron materials for rotating shaft are
considered in the measurements and calculations to
evaluate solid iron material effect on the eddy current speed
sensor performance. 2D and 3D finite element method is
utilized for the performance analysis of the speed sensor.
Also, a 2D analytical method is developed for parametric
analysis. A copper rod is also used to compare the speed
sensor with the rotating iron shaft and copper shaft. Finally,
two thin copper discs with different diameters are mounted
on the solid iron shaft and their influences on the eddy
current speed sensor were evaluated and measured to
increase sensitivity and decrease sensor dependency on
the permeability of the solid iron shaft. The achieved
nonlinearity errors are about ±0.2%.
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Kolekce
- Publikační činnost ČVUT [1323]