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:
Dec. 07, 2021
Filed:
Nov. 22, 2018
Applicant:
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-ku, JP;
Inventor:
Shoichi Abe, Chuo-ku, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H02J 9/06 (2006.01);
U.S. Cl.
CPC ...
H02J 9/061 (2013.01); H02J 9/062 (2013.01);
Abstract
In an uninterruptible power supply apparatus, a converter () is controlled such that terminal-to-terminal voltage (VDC) of a capacitor (Cd) becomes a first reference voltage (VDCr) in an inverter power feed mode and a bypass power feed mode. In a switching period in which the inverter power feed mode and the bypass power feed mode are switched, the converter is controlled such that the terminal-to-terminal voltage of the capacitor becomes a second reference voltage (VDCr) higher than the first reference voltage to prevent circulating current (IC) from flowing through a path including the capacitor.