Current transducer and current-monitoring method
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United States of America Patent
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May 16, 2000
Grant Date -
N/A
app pub date -
Jul 31, 1997
filing date -
Aug 1, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
A current transducer includes a current transformer in which the conductor carrying the current to be monitored constitutes the primary. The transformer secondary is wound on a toroidal core. The transformer is operated below its cut-off frequency such that the output from the secondary is proportional to the differential of the current in the primary. The secondary output is integrated by an integrator to provide a measure of current in the primary and the integrator is initialized at predetermined intervals. A current measuring device for an electric machine, for example a reluctance machine, includes at least one of the current transducers.
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