Device with wide passband for measuring electric current intensity in a conductor
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United States of America Patent
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Apr 2, 2002
Grant Date -
N/A
app pub date -
Oct 20, 1999
filing date -
Apr 21, 1997
priority date (Note) -
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Abstract
The current to be measured (I) passes in a conductor (1) enclosed with a Rogowski coil (4) and in the proximity thereof are arranged several magnetic field detectors (3). The sum of the signals from these detectors, formed in the device (2), and the signal supplied by the Rogowski coil are applied to a signal processor (7). The processor (7) comprises, for example, a first order delay device connected to the Rogowski coil output and means for amplifying/reducing the signals followed by adding means, the delay time constant and the amplifying/reducing factors being selected so that the device output (8) signal is proportional to the intensity of the current to be measured in a very wide frequency range, i.e. from 0 to more than 10 MHz.
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