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. 19, 2015
Filed:
Mar. 06, 2013
Applicants:
Bing LI, Singapore, SG;
David Leggate, New Berlin, WI (US);
Timothy Rowan, Wauwatosa, WI (US);
Inventors:
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 7/10 (2006.01); G01R 21/06 (2006.01); H02M 5/458 (2006.01); H02M 1/14 (2006.01);
U.S. Cl.
CPC ...
G01R 21/06 (2013.01); H02M 5/4585 (2013.01); H02M 1/14 (2013.01);
Abstract
Methods and apparatus are presented for detecting phase loss and/or excessive ripple in a power converter, in which bandpass filters are used to obtain harmonic voltage amplitudes associated with the power converter DC bus, and phase loss is detected if a ratio of the second harmonic to the sixth harmonic and/or a ratio of the fourth harmonic to the sixth harmonic exceed predetermined threshold values.