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:
Jun. 23, 2020
Filed:
Dec. 06, 2018
Fuji Electric Co., Ltd., Kanagawa, JP;
Yasuhiro Tamai, Tokyo, JP;
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Abstract
An uninterruptible power supply includes a main uninterruptible power supply unit including a converter, an inverter, and a battery, as well as an input transformer which is arranged between an AC power supply and the converter and transforms the AC voltage from the AC power supply. The uninterruptible power supply further includes a DC component extraction unit that extracts a DC component from current flowing between the AC power supply and the converter, as well as a CPU which, when the DC component extracted by the DC component extraction unit is greater than a threshold current, stops operation of the converter and causes DC voltage from the battery to be supplied to the inverter.