Study of sensor modellinMeasurement Errors in a Current Sensor with Air-Gaps.

Abstract

A modelization of a toroidal current sensor with air gaps using the 3D finite element method is presented. The errors associated with this sensor have been evaluated and the experimental verification has been carried out. With this model we try to study the sensitivity to the crosstalk error of this kind of current sensors in function of two design parameters, the width of the air gap and the position of the sensor with respect to the cable carrying current.

Analysis by finite element method of the crosstalk errors associated to the geometrical parameters for current transducers.

“…In this paper we try to advance a bit more. We will analyse the geometrical dependence (section of conductors, distance between them, permeability, …) of this -stable point-with the aim of validate our model and observe the compensation of cross-talk errors originated by the current carried by near conductors [5], [6] under normal working conditions [7]. In this way, a comparison between the uncertainties associated to the geometrical parameters -values numerically calculated with the modelization by Finite Element Method-and the magnetic flux of an infinite straight line calculated theoretically by the Biot-Savart law has been done.…”