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

fYear

2012

fDate

1-6 July 2012

Firstpage

330

Lastpage

331

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM), 2012 Conference on

Conference_Location

Washington, DC

ISSN

0589-1485

Print_ISBN

978-1-4673-0439-9

Type

conf

DOI

10.1109/CPEM.2012.6250936

Filename

6250936