The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2017
Filed:
Mar. 23, 2015
Schneider Electric Usa, Inc., Palatine, IL;
Alexander Filippenko, Cary, NC (US);
Mark Kocher, Raleigh, NC (US);
Schneider Electric USA, Inc., Andover, MA (US);
Abstract
The invention detects foreign objects FO near a primary coilof an induction charger. A sensorsof a sensor arrayoutput sensing signals in response to magnetically coupling the alternating magnetic fieldproduced by the primary coil. A controllerconnected to each sensorscans the sensing signals and determines whether there is a foreign object perturbing the magnetic fieldnear a sensor. The magnetic field has a spatial distribution that varies by location across the primary coil area. Each sensor has a magnetic field sensing sensitivity that is inversely proportional to the magnetic intensity of the magnetic field produced by the primary coil at a location of the sensor, to reduce the collective dynamic range of the signals, thereby contributing to maintaining a high accuracy in signal sampling. A reference sensor coilcompensates for magnetic field drift of the primary coil.