Electronic circuit for measuring electrical energy
A metering apparatus is described comprising: current input means for providing a signal that is proportional to the time derivative of an alternating current in a circuit; first clock means integrating means for modulating the series of clock pulses; means for delaying the first pulse modulated signal by a predetermined amount of time; second clock means for providing a second series of clock pulses; voltage input means for providing a signal that is proportional to the voltage of the circuit; first multiplier means for providing a signal that is proportional to the product of the second pulse width modulated signal and the signal that is proportional to the voltage of the circuit. The first multiplier means is connected to the output of the delaying means and the output of the voltage input means; and wherein the output of the first multiplier means is proportional to the volt-amperes reactive of the circuit.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- US 4663587
- OSTI ID:
- 6416584
- Resource Relation:
- Patent File Date: Filed date 2 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
POWER METERS
DESIGN
ELECTRONIC CIRCUITS
OPERATION
ALTERNATING CURRENT
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
FREQUENCY DEPENDENCE
PULSES
SIGNALS
TIME DEPENDENCE
CURRENTS
ELECTRIC CURRENTS
ELECTRIC MEASURING INSTRUMENTS
ELECTRICAL EQUIPMENT
ELECTRICAL PROPERTIES
EQUIPMENT
MEASURING INSTRUMENTS
METERS
PHYSICAL PROPERTIES
420800* - Engineering- Electronic Circuits & Devices- (-1989)