Current measuring device

Details Current measuring device Current measuring device

1975-09-22

1977-03-08

Rolinec, R. V.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324127, G01R 1502, G01R 3300

Patent

active

040115054

ABSTRACT:
A current measuring device for measuring a current flowing in a conductor by inductive coupling to the conductor, the device having an E-shaped core of magnetic material and a slidable bar normally spaced by an air gap from one outer leg and being slidably movable away from this outer leg to permit the insertion of the conductor being measured. Two pairs of windings are placed on the other outer leg. One winding in each pair is alternately energized under the control of a transistor oscillator network, the other winding in each pair being used to supply feedback voltages to cause deenergization of the transistor then conducting. Each transistor has in series therewith a second transistor to minimize clipping of the voltage peaks. The output of the windings is applied to the input of a further transistor, the output of which is in turn applied to a current measuring device.

REFERENCES:
patent: 1524285 (1925-01-01), Besag
patent: 3422352 (1969-01-01), Paulkovich
patent: 3708749 (1973-01-01), Bateman et al.

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