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. 10, 1998
Filed:
Oct. 29, 1996
Mitsuo Nakamura, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An input overcurent suppression circuit is used for a DC-DC converter in uninterruptible power supply source and includes a plurality of DC-DC converters, an AC-DC converter and a detecting means for detecting an input current to the DC-DC converters. In the plural DC-DC converters, a parallel circuit constituted by a resistor element and a switching element is connected in series with an input circuit to break the circuit in response to an overcurrent or over heating. When the power source circuit is closed, a surge current-preventing circuit prevents the surge current by turning a switching element off for a predetermined period of time. The AC-DC converter feeds current to at least two or more DC-DC converters among the plurality of DC-DC converters. When the detecting means has detected an overcurrent, the switching element is turned off to turn off the resistor element connected in parallel with the switching element, to thereby suppress the overcurrent flowing into the AC-DC converter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile