Title :
Improved AC–DC Current Transfer Step-Up With New Current Shunts and Potential Driven Guarding
Author :
Funck, Torsten ; Klonz, Manfred
Author_Institution :
Phys.-Technische Bundesanstalt, Braunschweig
fDate :
4/1/2007 12:00:00 AM
Abstract :
The ac-dc current transfer standards at PTB have been improved in frequency and current range up to 1 MHz and 1 A using a newly designed transconductance amplifier. Up to 100 kHz and 10 A, the uncertainties could be dramatically reduced. Starting from the calculable quartz planar multifunction thermal converter at 30 mA, for currents up to 10 A, new shunts with small frequency and current level dependence and an improved measurement set-up are used
Keywords :
AC-DC power convertors; power amplifiers; transfer standards; AC-DC current transfer; QPMJTC; current shunts; driven guarding; quartz planar multifunction thermal converter; transconductance amplifier; Circuits; Coaxial components; Current measurement; Dynamic range; Frequency conversion; Frequency measurement; Measurement standards; Position measurement; Transconductance; Voltage; AC–DC current transfer; calculable quartz planar multijunction thermal converter (QPMJTC); current shunt; transconductance amplifier;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2007.890803
