Isolated current monitoring circuit for measuring direct and hig

Details Isolated current monitoring circuit for measuring direct and hig Isolated current monitoring circuit for measuring direct and hig

1992-10-08

1994-03-08

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Magnetic saturation

324127, G01R 3300, G01R 120

Patent

active

052931218

ABSTRACT:
A method and circuit for measuring direct and high duty factor current in a conductor (1) with minimal interference with the operation of a monitored circuit. Current flow in the conductor is magnetically sensed with a transformer T1 having a primary winding connected electrically in series with the conductor (1). The transformer T1 is driven into saturation during a first time interval and brought out of saturation during a second time interval. After the transformer T1 is brought out of saturation, an output signal is provided which is proportional to the flow of current in the conductor (1).

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patent: 4626777 (1986-12-01), Ainsworth
patent: 5008612 (1991-04-01), Otto
patent: 5128611 (1992-07-01), Konrad

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