Watthour meter comprising a Hall sensor and a voltage-frequency

Details Watthour meter comprising a Hall sensor and a voltage-frequency Watthour meter comprising a Hall sensor and a voltage-frequency

1987-04-09

1989-02-28

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

324117H, 324130, 324132, G01R 2108, G01R 1510

Patent

active

048089184

ABSTRACT:
A watthour meter having a Hall component in a sensor circuit connected to a low voltage type of voltage-to-frequency converter, achieves linear signal conversion of the voltage output from the sensor circuit with maximum polarity reversal of the Hall voltage by synchronizing such polarity reversal with polarity reversal across an integration capacitor of the converter so that the amplified offset voltage produced by the integration operation and the effects of capacitor instability compensate for each other.

REFERENCES:
patent: 4327416 (1982-04-01), Jerrim

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