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. 17, 2022
Filed:
Jun. 22, 2020
Tdk Corporation, Tokyo, JP;
Kazuyoshi Hanabusa, Tokyo, JP;
TDK CORPORATION, Tokyo, JP;
Abstract
A wireless power transmission device capable of reducing an output power of wireless power receiving device receiving power transmitted from a wireless power transmission device. The wireless power transmission device including: a DC (Direct Current)/DC converter; an inverter configured to convert output voltage of the DC/DC converter into AC voltage having driving frequency; a power transmission coil configured for the AC voltage to be supplied to from the inverter and configured to generate the AC magnetic field; a transmission-side resonance circuit including the power transmission coil; and control circuit configured to increase difference between a driving frequency of the inverter and a resonance frequency of the transmission-side resonance circuit when a predetermined condition is satisfied.