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:
Feb. 23, 2016
Filed:
Nov. 14, 2014
Applicant:
Liebert Corporation, Columbus, OH (US);
Inventor:
Xian Chen, Columbus, OH (US);
Assignee:
Liebert Corporation, Columbus, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 5/45 (2006.01); H02M 1/12 (2006.01); H02J 9/00 (2006.01); H02M 7/537 (2006.01);
U.S. Cl.
CPC ...
H02M 1/12 (2013.01); H02J 9/00 (2013.01); H02M 7/537 (2013.01);
Abstract
A repetitive servomechanism controller for a UPS system has an inner control loop and an outer control loop. The inner control loop regulates inverter current and the outer control loop regulates inverter voltage. The outer control loop includes a repetitive controller in combination with a harmonic servomechanism controller and a feed-forward controller.