Current sensor

There is provided a voltage or current sensing device. An exemplary voltage or current sensing device includes a drive circuitry configured to deliver a drive current to a magnetic core operably coupled with a conductor, for driving the core to cyclical magnetic saturation. The device also includes...

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Bibliographische Detailangaben
Hauptverfasser:	VORNDRAN ERIC, PENNY, III DANIEL G, FRIES JEFFREY MICHAEL, KRAELING MARK, CLARK SHAWN T, MURPHY STEVE R, ARMSTRONG JEFFERY, BETTIS ROBERT N, BROWN BRADLEY DALE, HANN GREGORY K
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS BASIC ELECTRIC ELEMENTS ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES ORDER TELEGRAPHS PHYSICS RELAYS SELECTORS SIGNALLING SIGNALLING OR CALLING SYSTEMS TESTING
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Beschreibung
Zusammenfassung:	There is provided a voltage or current sensing device. An exemplary voltage or current sensing device includes a drive circuitry configured to deliver a drive current to a magnetic core operably coupled with a conductor, for driving the core to cyclical magnetic saturation. The device also includes sense circuitry configured to receive a voltage signal corresponding to an application current in the conductor. The device also includes signal processing circuitry configured to sample the voltage signal, wherein a first sample is in phase with the drive current and a second sample is out of phase with the drive current. The device also includes a feedback loop configured to deliver a compensation current to the magnetic core, wherein the compensation current is configured to balance the magnetic core and wherein the compensation current is based at least in part on the first sample in phase with the drive current.