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:
May. 16, 2017
Filed:
Aug. 09, 2012
Applicants:
Yogesh Popatlal Patel, Grafton, WI (US);
Lixiang Wei, Whitefish Bay, WI (US);
Russel J. Kerkman, Milwaukee, WI (US);
Inventors:
Yogesh Popatlal Patel, Grafton, WI (US);
Lixiang Wei, Whitefish Bay, WI (US);
Russel J. Kerkman, Milwaukee, WI (US);
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 1/32 (2007.01); H02M 1/12 (2006.01); H02M 5/458 (2006.01); H01G 4/40 (2006.01); G01R 31/42 (2006.01); G01R 31/02 (2006.01);
U.S. Cl.
CPC ...
H02M 1/32 (2013.01); H02M 1/126 (2013.01); G01R 31/028 (2013.01); G01R 31/42 (2013.01); H01G 4/40 (2013.01); H02M 5/4585 (2013.01);
Abstract
Power conversion systems and methods are presented for detecting input filter capacitor degradation or approach of end of operational life based on filter capacitor current measurements using single and/or dual threshold comparisons for computed instantaneous sum of squares of filter currents or power values.