Calibrations of resistance welding equipment with high pulsed currents

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DOIResolve DOI: http://doi.org/10.1109/TIM.2015.2399011
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TypeArticle
Journal titleIEEE Transactions on Instrumentation and Measurement
ISSN0018-9456
Volume64
Issue6
Article number7104237
Pages17671772; # of pages: 6
SubjectCalibration; Electric current control; Uncertainty analysis; Welding; Welds; AC measurements; Digital sampling; Measurement uncertainty; Pulsed currents; Rogowski Coil; Weld current; Resistance welding
AbstractRogowski coils are widely used as high pulsed current sensors in resistance welding applications. The operating conditions of the coils determine the requirements for their calibration. A new calibration system has been developed at National Research Council (NRC) Canada for calibrating current sensing coils and weld current monitors (WCMs) used in AC resistance welding. The calibration system, which includes a high-current source and a coaxial copper cage, has been evaluated at peak pulsed currents of up to 80 kA at 60 Hz. The expanded measurement uncertainties (k = 2) have been estimated to be less than 350 μA/A for magnitude. A method for the calibration of WCMs separately from their Rogowski coils at conditions that correspond to those obtained at high pulsed currents but without the need to use actual high pulsed currents has also been developed.
Publication date
PublisherIEEE
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Measurement Science and Standards
Peer reviewedYes
NPARC number21275656
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Record identifierc7d63de7-d79e-495a-a1b3-f493e433c12f
Record created2015-07-14
Record modified2016-05-09
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