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. 02, 2024
Filed:
Nov. 02, 2022
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Masakazu Kato, Numazu Shizuoka, JP;
Toshiba Tec Kabushiki Kaisha, Tokyo, JP;
Abstract
According to an embodiment, a power transmission device performs power transmission without contact with a power reception device. A control circuit of the power transmission device obtains, as a reference value, a standby current in a standby state in which the power transmission to the power reception device is not performed. The control circuit sets, as a foreign matter detection threshold, a value obtained by adding a constant value to the reference value or a value obtained by adding a constant ratio to the reference value. Further, in the standby state, when the current value input to the power transmission circuit and detected by the current detection circuit is equal to or larger than the threshold, the control circuit determines that there is a foreign matter on the power transmission coil.