Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural inputs
Patent
1978-11-24
1981-02-10
Krawczewicz, Stanley T.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural inputs
G01R 2106
Patent
active
042504490
ABSTRACT:
A digital electric energy measuring circuit for totalizing electrical power and energy usage from an alternating current supply by converting a voltage signal representing the current component into a pulse train signal whose frequency is proportional to the magnitude of the voltage, sampling that frequency to provide a digital value representing the current component, and then converting a voltage signal representing the voltage component into a second pulse train signal whose frequency is proportional to the magnitude of the voltage which is used to control the rate that the digitized value of the current component is successively added which provides an indication of electrical energy that is totalized and displayed.
REFERENCES:
patent: 4056774 (1977-11-01), Shum
patent: 4079313 (1978-03-01), Callan
Krawczewicz Stanley T.
Pencoske E. L.
Westinghouse Electric Corp.
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