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:
Apr. 16, 2019
Filed:
Apr. 01, 2015
Applicant:
Toshiba Mitsubishi-electric Industrial Systems Corporation, Chuo-ku, JP;
Inventors:
Assignee:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02J 9/06 (2006.01); H02M 7/12 (2006.01); H02M 7/493 (2007.01); H02J 3/38 (2006.01);
U.S. Cl.
CPC ...
H02J 9/06 (2013.01); H02J 3/38 (2013.01); H02M 7/12 (2013.01); H02M 7/493 (2013.01);
Abstract
An uninterruptible power supply device () does not have a wire connecting a bidirectional chopper () to a neutral point (NP). The bidirectional chopper () includes first and second capacitors (C, C), first to fourth transistors (Q-Q), and a normal mode reactor (). In a discharging mode, a controller () causes the second and third transistors (Q, Q) to be complementarily turned on and controls the ON period of each of the second and third transistors (Q, Q) so that terminal-to-terminal voltages (V, V) of the first and second capacitors (C, C) are equal to each other.