Electricity: power supply or regulation systems – Including a transformer or an inductor – With compensation
Patent
1990-10-29
1991-09-24
Wong, Peter S.
Electricity: power supply or regulation systems
Including a transformer or an inductor
With compensation
323358, 324127, G01R 1900, H01F 4006
Patent
active
050516876
ABSTRACT:
A transimpedance circuit for generating an output voltage replica of an alternating current input has its accuracy improved by the use of a current comparator, the ratio windings of the comparator respectively carrying a current proportional to the input current and a current proportional to the output voltage. A further winding of the comparator detects any ampere-turns imbalance in the ratio windings, and, as a result, generates a correction signal proportional to such imbalance. This correction signal is then employed to correct the output voltage.
REFERENCES:
patent: 4198595 (1980-04-01), Milkovic
patent: 4250448 (1981-02-01), Daniels
patent: 4967145 (1990-10-01), Davies
S. P. Mehta et al.; "Calibration of Test Systems for Measuring Power Losses of Transformers"-published in IEEE Transactions on Power Delivery, vol. PWRD-1, No. 4, Oct. 1986.
N. L. Kusters et al; "The Compensated Current Comparator; a New Reference Standard for Current-Transformer Calibrations in Industry"-published in IEEE Transactions on Instrumentation and Measurement, vol. IM-13, Nos. 2 and 3, Jun.-Sep. 1964, pp. 107-114.
National Research Council of Canada/Conseil National de Recherch
Wong Peter S.
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