FLUXGATE CURRENT SENSOR
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United States of America Patent
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Issued Date -
Oct 15, 2015
app pub date -
Jun 10, 2014
filing date -
Apr 14, 2014
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A current sensor arrangement for measuring an effective primary current in a primary conductor is described. The current sensor arrangement comprises a magnetic core for the magnetic connection of the primary conductor to a secondary conductor, as well as a controlled voltage source that is connected to the secondary conductor and configured to apply a voltage with adjustable polarity to the secondary conductor. As a result of this, a secondary current flows through the secondary conductor. A measurement and control unit connected to the secondary conductor is configured to generate a measurement signal representing a secondary current and to continuously detect the achievement of a magnetic saturation in the core. In the case of detection of a magnetic saturation of the core, the polarity of the voltage is reversed in order to reversely magnetize the core. Moreover, the measurement and control unit is configured to sample the measurement signal after a delay time following the detection of a magnetic saturation of the core. This delay time is adjusted adaptively depending on a previously determined time period between two successive times when magnetic saturation of the core has been detected.
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