Title :
Coil correction for oscillatory calibration of a watt balance
Author :
Jones, K. ; Christian, L.A. ; Sutton, C.M.
Author_Institution :
Meas. Stand. Lab. of New Zealand (MSL), Lower Hutt, New Zealand
Abstract :
An oscillatory dynamic mode has been proposed for a watt balance and this mode relies on the measurement of an ac voltage to determine the factor γ that relates coil current to the resultant force on the coil. A correction is required to account for the effect of the impedance and self-capacitance of the coil and the admittances presented by the ac voltmeter. This paper calculates the correction for a test coil and highlights the magnet and coil design parameters that influence this correction.
Keywords :
balances; calibration; capacitance; coils; electric admittance; electric impedance; permanent magnets; voltage measurement; AC voltage measurement; AC voltmeter; coil current; coil design parameter; electric admittance; impedance effect; magnet design parameter; oscillatory calibration; oscillatory dynamic mode; resultant force; self-capacitance effect; test coil correction; watt balance; Capacitance; Coils; Current measurement; Magnetic circuits; Magnetic field measurement; Soft magnetic materials; Voltage measurement; Coils; impedance; magnetic circuits; measurement standards; voltage measurement; watt balance;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2012 Conference on
Conference_Location :
Washington, DC
Print_ISBN :
978-1-4673-0439-9
DOI :
10.1109/CPEM.2012.6250936
