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. 08, 2019
Filed:
Apr. 05, 2017
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Satoshi Shimokawa, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A power receiver includes: a first secondary-side resonant coil that receives electric power from a primary-side resonant coil through magnetic field resonance; a capacitor; a smoothing circuit; a pair of output terminals; a switch coupled in parallel to the capacitor or in series between a rectifier circuit and either a first terminal or a second terminal; and a drive controller that drives the switch through a first PWM drive pattern determined by a first duty cycle and by a first frequency that is less than or equal to a frequency of the magnetic field resonance. The first duty cycle is set based on a first efficiency of power reception of the first secondary-side resonant coil, a first rated output of a first load, a second efficiency of power reception of a second secondary-side resonant coil of another power receiver, and a second rated output of a second load.