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:
Apr. 25, 2017
Filed:
Jun. 10, 2014
Central Japan Railway Company, Aichi, JP;
Fuji Electric Co., Ltd., Kanagawa, JP;
Toshiaki Murai, Tokyo, JP;
Yoshiyasu Hagiwara, Kanagawa, JP;
Tadashi Sawada, Saitama, JP;
Masayuki Tobikawa, Kanagawa, JP;
Ayako Saga, Tokyo, JP;
Michio Tamate, Tokyo, JP;
Koji Maruyama, Tokyo, JP;
Tomotaka Nishijima, Hyogo, JP;
CENTRAL JAPAN RAILWAY COMPANY, Nagoya-Shi, Aichi, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, Kanagawa, JP;
Abstract
In a power supply device, the bridge circuit is configured by connecting, in parallel, a plurality of series circuits of an inverse-parallel connection circuit of a semiconductor switch and a diode. A control unit controls switching of a semiconductor switch so that a voltage v between AC terminals becomes zero voltage in equal periods α before and after a center point shifted from one zero crossing point in one cycle of the input current by a compensation period (angle) β calculated from a voltage applied to a resonance circuit constituted by the power receiving coil and a resonance capacitor Cand an induced voltage of the power receiving coil, and becomes a positive-negative voltage whose peak value is the voltage Vbetween DC terminals in other periods.