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:
Mar. 31, 2020
Filed:
Mar. 13, 2015
Equos Research Co., Ltd., Tokyo, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Hiroyuki Yamakawa, Hokkaido, JP;
Kenichiro Sato, Tokyo, JP;
Shinji Ichikawa, Aichi, JP;
Naoki Gorai, Aichi, JP;
EQUOS RESEARCH CO., LTD., Tokyo, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A power transmission system transmits electric energy to a secondary resonator having a secondary resonator coil through an electromagnetic field of a predetermined frequency from a resonator having a resonator coil and reduces noise using two noise cancellation resonators with one predetermined frequency and its higher harmonic component set as noise reduction target frequency. The system includes, as two noise cancellation resonators, a first noise cancellation resonator including a first noise cancellation resonator coil and has a resonance frequency higher than the noise reduction target frequency by a first shift frequency determined according to a coupling degree between the resonator coil and first noise cancellation resonator coil and second noise cancellation resonator including a second noise cancellation resonator coil and has a resonance frequency lower than the noise reduction target frequency by a second shift frequency according to coupling degree between the resonator coil and second noise cancellation resonator coil.