AC power calibration system with phase feedback

Author

Hess, D.T. ; Clarke, K.K.

Author_Institution

Clarke-Hess Commun. Res. Corp., New York, NY, USA

fYear

1990

fDate

11-14 June 1990

Firstpage

140

Lastpage

141

Abstract

A ´phantom´ power calibration system that combines a digital phase angle generator with a 120-V/75-mA voltage amplifier and a voltage-controlled, almost ideal, 5-A/5-V current source is described. Voltages up to 120 V at burdens of 75 mA and currents of up to 6 A at compliance voltages of 5 V are available up to 6 kHz. The current amplifier incorporates a nearly ideal current source output, a broadband shunt, and a set of nearly ideal, wideband, low-distortion, 10*, differential amplifiers with common mode rejection ratios exceeding 96 dB at 5 kHz. The system provides phase-controllable voltages and currents from 20 Hz to 5 kHz with phase accuracies approaching 0.001/sup 0/.<>

Keywords

calibration; power measurement; 120 V; 20 Hz to 5 kHz; 5 V; 6 A; 6 kHz; 75 mA; AC power calibration; broadband shunt; current amplifier; current source; differential amplifiers; digital phase angle generator; phantom; phase controlled current; phase feedback; phase-controllable voltages; voltage amplifier; Bipolar transistors; Calibration; Differential amplifiers; Feedback circuits; Frequency; Operational amplifiers; Output feedback; Phase distortion; Power amplifiers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on

Conference_Location

Ottawa, Ontario, Canada

Type

conf

DOI

10.1109/CPEM.1990.109961

Filename

109961