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:
Sep. 23, 2014
Filed:
Jan. 19, 2011
Toru Daigo, Chiyoda-ku, JP;
Toru Daigo, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A power supply device capable of switching over semiconductor switches of a synchronous rectification means so as to efficiently charge up a battery in response to its charging status is provided. The device includes a switch control means for controlling the semiconductor switches in response to the battery charging status; a negative voltage detection means for detecting a negative voltage at each phase of three-phase AC voltages; and a voltage detection means for detecting the battery voltage being higher than a predetermined voltage, wherein when the negative voltage or the battery voltage higher than the predetermined voltage is detected, the switch control means controls the semiconductor switches. The device further includes an abnormality detection means for monitoring the negative voltage detected by the negative voltage detection means and thereby detecting an abnormality in at least one of the three phases, and when an abnormality is detected, the switch control means controls the semiconductor switch corresponding to the phase of the abnormality.