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:
Jun. 03, 2014
Filed:
Nov. 03, 2009
David M. Messersmith, Kenosha, WI (US);
Douglas J. Bader, Grafton, WI (US);
Haihui LU, Shanghai, CN;
Thomas A. Nondahl, Wauwatosa, WI (US);
Zhenhuan Yuan, Shanghai, CN;
David M. Messersmith, Kenosha, WI (US);
Douglas J. Bader, Grafton, WI (US);
Haihui Lu, Shanghai, CN;
Thomas A. Nondahl, Wauwatosa, WI (US);
Zhenhuan Yuan, Shanghai, CN;
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
A method of estimating stator resistance of an induction motor includes applying voltage pulses through two phase paths of the motor for a plurality of electrical cycles to inject current in the motor, wherein the voltage pulses are applied until rotor flux of the motor is substantially stabilized and measuring stator voltage and stator current in response to the applied voltage pulses for each of the plurality of electrical cycles. The method also includes calculating the stator resistance based upon the measured stator voltages and the stator currents.