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:
May. 17, 2022
Filed:
Apr. 06, 2018
Toshiba Mitsubishi—electric Industrial Systems Corporation, Chuo-ku, JP;
Hiroki Shigeta, Chuo-ku, JP;
Toshihide Nakano, Chuo-ku, JP;
Abstract
A controller () of an uninterruptible power supply apparatus includes: first to sixth comparator circuits (to) respectively provided corresponding to first to sixth IGBTs (Qto Q) and outputting, based on a comparison result of the magnitude of three-phase AC voltages, signals (Ato A) indicating that a corresponding IGBT is to be turned on; and a control unit () that, when a voltage between terminals (VDor VD) of a first or second capacitor (Cor C) is higher than a target voltage (VDT), turns on and off each of the first to sixth IGBTs based on signals output from the first to sixth comparator circuits to decrease the voltage between terminals of the first or second capacitor.