Electronic watthour meter
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United States of America Patent
Stats
-
Dec 12, 1995
Issued Date -
N/A
app pub date -
Jan 6, 1995
filing date -
Nov 21, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A first Hall element is supplied with a current proportional to a load voltage and applied with a magnetic field proportional to a load current and produces a voltage proportional to a load power given by the load voltage and the load current. A second Hall element has the same characteristic as that of the first Hall element and supplied with the current proportional to the load voltage and no magnetic field. The output voltages of the first and the second Hall elements are combined by combining means to compensate and remove an offset voltage component contained in the output voltage of the first Hall element.
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