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:
Jan. 14, 2025
Filed:
Sep. 07, 2023
Omron Corporation, Kyoto, JP;
OMRON Corporation, Kyoto, JP;
Abstract
A foreign matter detection device includes: a plurality of detection coils (-to-) between a transmission coil () of a power transmission device () and a reception coil () of a power reception device (), through which power is transmitted in a contactless manner; a plurality of capacitors (-to-) forming, for each of the detection coils, a resonance circuit together with the detection coil; a power supply circuit () supplying AC power having a predetermined frequency to each detection coil; and a detection circuit () detecting a voltage output from each detection coil and detecting a foreign matter entering between the transmission coil () and the reception coil () according to the voltage detected. Then, each detection coil is arranged to overlap by a predetermined amount that allows electromagnetic coupling between adjacent two of the detection coils (-to-) to be ignored.