Identifying the operation of a specified type of appliance
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United States of America Patent
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Nov 3, 2015
Grant Date -
May 31, 2012
app pub date -
Jul 21, 2010
filing date -
Jul 30, 2009
priority date (Note) -
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Abstract
A method of identifying the operation of an electrical appliance comprising an induction motor is described. The method comprises identifying the operation of an electrical appliance including an induction motor when a path traced by real power values against corresponding reactive power values over a time period of interest comprises one or more substantially circular arcs. The real power values are related to the total real power supplied to one or more electrical appliances as a function of time, and the reactive power values are related to the total reactive power supplied to the one or more electrical appliances as a function of time. There is also described a related method of identifying the operation of a specified type of appliance, in which the operation of said specified type of appliance is dependent on a supply of at least one utility such as electricity, natural gas or water.
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