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. 09, 2007
Filed:
Feb. 23, 2005
Applicant:
Eddy Ying Yin Ho, Torrance, CA (US);
Inventor:
Eddy Ying Yin Ho, Torrance, CA (US);
Assignee:
International Rectifier Corporation, El Segundo, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for detecting a loss of a phase in a multiphase rotating field machine, the method comprising providing a first electrical current into the machine windings to cause the current vector to assume a first current vector position, sensing a first current in at least one selected phase winding of the machine, comparing the sensed first current in the at least one selected phase winding with a first calculated current for the selected phase winding, and detecting that a first phase fault has occurred if the first calculated and sensed first currents differ by more than a predetermined value.