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:
Jan. 20, 2015
Filed:
Jun. 26, 2012
Applicants:
Yuan Xiao, Kitchener, CA;
Navid Zargari, Cambridge, CA;
Manish Pande, Cambridge, CA;
Vijay Khatri, Brampton, CA;
Inventors:
Yuan Xiao, Kitchener, CA;
Navid Zargari, Cambridge, CA;
Manish Pande, Cambridge, CA;
Vijay Khatri, Brampton, CA;
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/00 (2006.01); H02M 5/451 (2006.01); H02M 1/32 (2007.01); H02M 5/458 (2006.01); H02M 7/525 (2006.01); H02M 7/539 (2006.01); H02J 3/00 (2006.01); H02J 3/36 (2006.01); H02M 5/40 (2006.01); H02M 7/06 (2006.01);
U.S. Cl.
CPC ...
H02M 5/451 (2013.01); H02M 1/32 (2013.01); H02M 5/458 (2013.01); H02M 5/4585 (2013.01); H02M 7/525 (2013.01); H02M 7/539 (2013.01);
Abstract
Variable frequency motor drives and control techniques are presented in which filter capacitor faults are detected by measuring filter neutral node currents and/or voltages and detecting changes in a frequency component of the measured neutral condition and/or based on input current unbalance.