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. 02, 2003
Filed:
Oct. 01, 2001
Applicant:
Inventors:
Gary Leonard Skibinski, Milwaukee, WI (US);
Dongsheng Zhou, Cedarburg, WI (US);
Frederick Louis Hoadley, Mequon, WI (US);
Naihu Li, Shanghai, CN;
Qiang Yin, Shanghai, CN;
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/12 ; G05F 1/70 ;
U.S. Cl.
CPC ...
H02M 1/12 ; G05F 1/70 ;
Abstract
An active filter controller for use with both pure and hybrid shunt filters wherein the controller maintains a minimum DC bus voltage required to generate a compensating current on coupling lines and also extrapolates to estimate an expected feedback current to be compensated so that compensation currents are more accurate and harmonic currents are appreciably reduced.