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:
May. 12, 2020
Filed:
Mar. 29, 2018
Tdk Corporation, Tokyo, JP;
Kazuyoshi Hanabusa, Tokyo, JP;
Takashi Urano, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
Disclosed herein is a magnetic coupling device that includes first and second coil units that transmit power or signals with each other by wireless. Each of the first and second coil units includes a first coil and a second coil. At least one of the first and second coil units has a first magnetic body constituting a magnetic path of a first magnetic flux interlinking the first coil and a second magnetic body constituting a magnetic path of a second magnetic flux interlinking the second coil. A permeability of the first magnetic body is larger than a permeability of the second magnetic body at a driving frequency of the first coil and smaller than a permeability of the second magnetic body at a driving frequency of the second coil higher than the driving frequency of the first coil.