Calibrations for resistance welding at high pulsed currents

Alternative titleCalibrations for resistance welding equipment with high pulsed currents
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Proceedings title2014 Conference on Precision Electromagnetic Measurements (CPEM 2014)
Series titleCPEM Digest
Conference29th Conference on Precision Electromagnetic Measurements, CPEM 2014, 24 August 2014 through 29 August 2014
Article number6898234
Pages1213; # of pages: 2
SubjectAC current measurement; Digital sampling; Measurement uncertainty; Pulsed currents; Rogowski Coil; Weld current; Calibration
AbstractRogowski coils are widely used as high pulsed current sensors in resistance welding. Their operating conditions reflect on requirements for their calibration. A new calibration system has been developed at NRC Canada for calibrating current sensing coils and weld current monitors for 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 best expanded measurement uncertainties (k=2) have been estimated to be within 250 μA/A for magnitude and 175 μrad for phase.
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AffiliationNational Research Council Canada (NRC-CNRC); Measurement Science and Standards
Peer reviewedYes
NPARC number21272955
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Record identifier36a1bf98-80c6-4b32-a05f-31754a18cd1d
Record created2014-12-03
Record modified2016-05-09
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