Method and device for AC/DC sensitive current measurement
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United States of America Patent
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Sep 15, 2015
Grant Date -
Dec 12, 2013
app pub date -
Jun 10, 2013
filing date -
Jun 12, 2012
priority date (Note) -
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Abstract
A method and a device for galvanically isolated, AC/DC sensitive current measurement including a control current transformer having a temporally changeable magnetic control flux which is not coupled to the magnetic flux in a measuring current transformer and forms a magnetic circuit in such a manner that a segment of the magnetic circuit of the measuring current transformer is formed as a shared segment with the magnetic circuit of the control current transformer so that the material forming the shared segment is permeated by the control flux and in connection with a nonlinear magnetic characteristic curve causes a change of the relative permeability in the material forming the segment and thus an induced partial voltage in the secondary winding.
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