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:
Dec. 04, 2018
Filed:
Jun. 30, 2016
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kenichi Asanuma, Osaka, JP;
Tsutomu Sakata, Osaka, JP;
Atsushi Yamamoto, Kyoto, JP;
Hiroshi Kanno, Osaka, JP;
Abstract
A power transmitting device determines transmitting power P(t) at a beginning of a first unit time, and transmitting power P(t) at an end of the first unit time, stores a control parameter Q(t) that determines a voltage of the transmitting power at a beginning of a second unit time, and a control parameter Q(t) that determines a voltage of the transmitting power at an end of the second unit time, determines a power difference ΔP=P(t)−P(t) and a difference ΔQ=Q(t)−Q(t) in the control parameter Q, and, if the ΔP is equal to or larger than a first threshold and an absolute value of the ΔQ is equal to or larger than a second threshold, determines that there is a foreign object between a receiver resonator and a transmitter resonator and decreases the transmitting power output from an inverter circuit.