Title :
A 600 V AC Voltage Amplifier for Power Measurements
Author :
Waltrip, Bryan C. ; Laug, Owen B. ; Nelson, Thomas L.
Author_Institution :
Nat. Inst. of Stand. & Technol., Gaithersburg, MD, USA
Abstract :
A voltage amplifier composed of three cascaded -10:1 gain sections has been developed to extend the voltage range of primary electric power calibrations from 120 to 600 V over the 50-400-Hz frequency range. The gain and phase errors of each amplifier section are continuously measured and corrected in situ using a permuting impedance measurement technique. The amplifier design approach, measurement principles, and initial performance results are presented.
Keywords :
electric impedance measurement; power amplifiers; power measurement; AC voltage amplifier design approach; frequency 50 Hz to 400 Hz; impedance measurement technique; power measurement; primary electric power calibrations; voltage 120 V to 600 V; Bridge circuits; Calibration; Capacitance; Capacitors; Power measurement; Standards; Voltage measurement; Calibration; error correction; feedback amplifier; measurement standards; measurement techniques; power measurement; voltage measurement; voltage measurement.;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2014.2381733
