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. 15, 2015
Filed:
Jul. 31, 2012
Yashomani Y. Kolhatkar, Secunderabad, IN;
Silvio Colombi, Losone, CH;
Marco Piemontesi, Ticino, CH;
Lauro Strozzi, Gordola, CH;
M N Lakshmi Prasad, Secunderabad, IN;
Yashomani Y. Kolhatkar, Secunderabad, IN;
Silvio Colombi, Losone, CH;
Marco Piemontesi, Ticino, CH;
Lauro Strozzi, Gordola, CH;
M N Lakshmi Prasad, Secunderabad, IN;
Other;
Abstract
Systems and methods are provided for controlling an uninterruptible power supply (UPS) to transition between three- or higher-level operation and two-level operation in a neutral-point-clamped (NPC) inverter. In an example, a UPS system includes an NPC inverter and a controller. The NPC inverter may supply power to a load. The controller may control the inverter to operate in a three-level mode or higher when the load is substantially balanced and to operate in a two-level mode when the load is substantially unbalanced.