High bandwidth open-loop current sensor
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United States of America Patent
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Jul 12, 2011
Grant Date -
Apr 22, 2010
app pub date -
Feb 22, 2008
filing date -
Mar 2, 2007
priority date (Note) -
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Abstract
Open-loop electrical current sensor (1) for measuring the electrical current flowing in a primary conductor, comprising a magnetic circuit (3) with an air-gap (4), and a magnetic field sensing device (5) positioned at least partially in said air-gap. The magnetic field sensing device comprises a circuit board (7), a first magnetic field detector (8) mounted on the circuit board, and a second magnetic field detector (11). The second magnetic field detector comprises a conductive coil formed on the circuit board, the output signals of the first magnetic field detector and the second magnetic field detector being adapted for connection to a signal processing circuit (6) generating an output signal representative of the primary electrical current.
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