Frequency compensator for a current-comparator capacitance bridg

Details Frequency compensator for a current-comparator capacitance bridg Frequency compensator for a current-comparator capacitance bridg

1982-03-29

1984-10-16

Krawczewicz, Stanley T.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324DIG1, G01R 1152, G01R 2726

Patent

active

044777728

ABSTRACT:
A method and apparatus for rendering a high-voltage current-comparator capacitance bridge insensitive to frequency fluctuations when used for measuring inductance. A compensating current, proportional to twice the change in the current through the reference capacitor due to frequency fluctuations, is driven into the first comparator winding, through which the current from the reference capacitor passes, resulting in a current in that winding having frequency characteristics similar to those of the current passing through the second winding, which is connected to the inductance. This compensating current is derived from a reduced replica of the applied high-voltage or from the current through the reference capacitor.

REFERENCES:
Foley: "Direct Reading Non-Frequency-Sensitive Current Comparator Bridges for Measurements on Capacitors and Reactors", IEEE Proceedings Southeast Con.--Apr. 1979--pp. 337-340.

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