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. 31, 2011
Filed:
Jun. 03, 2008
Bin LU, Kenosha, WI (US);
Thomas G. Habetler, Snellville, GA (US);
Pinjia Zhang, Atlanta, GA (US);
Peter J. Theisen, West Bend, WI (US);
Bin Lu, Kenosha, WI (US);
Thomas G. Habetler, Snellville, GA (US);
Pinjia Zhang, Atlanta, GA (US);
Peter J. Theisen, West Bend, WI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.