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:
Sep. 15, 2020
Filed:
Jun. 08, 2016
Rohm Co., Ltd., Kyoto, JP;
Yoshihiro Ikefuji, Kyoto, JP;
Akihiro Okui, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
In this non-contact power feeding system that is capable of transmitting power from a power transmitting device () to a power receiving device () by a magnetic field resonance scheme, the power transmitting device () is provided with first to n-th resonant circuits (TT[]-TT[n]) which are provided with coils (T) that are different in size, respectively, and which have a resonant frequency set to a prescribed reference frequency. Prior to power transmission, test magnetic fields are generated in sequence in the first to n-th resonant circuits to detect the amplitude of current flowing through the coils of respective resonant circuits, and the presence/absence of a foreign object is determined on the basis of the obtained first to n-th amplitude detected values, to control execution of the power transmission.