Electronic watthour meter

Details Electronic watthour meter Electronic watthour meter

1995-01-06

1995-12-12

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324117H, 324117R, 324141, G01R 104

Patent

active

054753031

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.

REFERENCES:
patent: 4292582 (1981-09-01), Hino
patent: 4464629 (1984-08-01), Tanaka et al.
patent: 4761605 (1988-08-01), Jochum
patent: 4775834 (1988-10-01), Lahti
patent: 4843311 (1989-06-01), Rozman et al.
patent: 4853620 (1989-08-01), Halder et al.

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