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1. (WO2013118516) SYSTEM AND METHOD FOR CALCULATING POWER USING CONTACTLESS VOLTAGE WAVEFORM SHAPE SENSOR

Pub. No.:    WO/2013/118516    International Application No.:    PCT/JP2013/000716
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Sat Feb 09 00:59:59 CET 2013
IPC: G01R 21/06
Applicants: SHARP KABUSHIKI KAISHA
Inventors: PARK, Daniel J.
OWEN, James E.
ELROD, David
Title: SYSTEM AND METHOD FOR CALCULATING POWER USING CONTACTLESS VOLTAGE WAVEFORM SHAPE SENSOR
Abstract:
A system and method are provided for calculating power using a voltage waveform shape measurement from a contactless sensor. An electrically conductive medium carries alternating current (AC) electrical current, associated with an AC voltage, from a source node to a destination node. AC current is measured through the electrically conductive medium. Using a contactless sensor, an AC voltage waveform shape is measured. The power usage at the destination node is calculated in response to the AC current measurement, the measurement of the AC voltage waveform shape, and an AC voltage potential. For simplicity, the AC current and AC voltage waveform shape may both be measured at a first node located between the source node and the destination node. The AC voltage potential used in the power usage calculation may be an estimate, an actual measurement, or a value supplied by an external source (e.g., the power utility).