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. 18, 2022
Filed:
Nov. 20, 2018
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-ku, JP;
Yousuke Hayashi, Chuo-ku, JP;
Abstract
In the present uninterruptible power supply apparatus (U), in a power failure of a commercial AC power supply (), a switch () is turned off to electrically cut off the commercial AC power supply () from an AC input filter (), and when DC voltage (ΔE=Ep−En) that is the difference between terminal-to-terminal voltages (Ep, En) of first and second capacitors (C, C) exceeds a threshold voltage (ETH), first and second IGBT devices (Q, Q) or third and fourth IGBT devices (Q, Q) included in the converter () are turned on and off to reduce DC voltage (ΔE).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile