Detection of a leakage current comprising a continuous component in a vehicle
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United States of America Patent
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Aug 15, 2017
Grant Date -
Jan 22, 2015
app pub date -
Feb 28, 2013
filing date -
Feb 29, 2012
priority date (Note) -
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Abstract
The invention relates to a device for detecting a leakage current, comprising means (124) for measuring a current from an electrical circuit of a vehicle, in particular a motor vehicle, said detection device being configured to be placed on board said vehicle and being such that the measuring means (124) comprise: a magnetic core (128) configured to be passed through by one or a plurality of conductive elements (127) traversed by the current from the electrical circuit, said conductive element(s) (127) forming a primary winding; a secondary winding (130), wound around the core (128), to generate a magnetic flux from a reference current; and an oscillator (132) for generating the reference current though the secondary winding (130), the reference current being configured to saturate said core (128). According to the invention, the value of the current of the primary winding (127) is obtained from the average value of the current at the secondary winding (130) over a period of oscillation covering a complete core (128) magnetization and demagnetization cycle. The invention also relates to various on-board systems using said device.
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