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:
Jul. 24, 2012
Filed:
Sep. 10, 2008
Jingbo Liu, Milwaukee, WI (US);
Mark M. Harbaugh, Richfield, OH (US);
Thomas a Nondahl, Wauwatosa, WI (US);
Peter B. Schmidt, Franklin, WI (US);
Semyon Royak, Beachwood, OH (US);
Jingbo Liu, Milwaukee, WI (US);
Mark M. Harbaugh, Richfield, OH (US);
Thomas A Nondahl, Wauwatosa, WI (US);
Peter B. Schmidt, Franklin, WI (US);
Semyon Royak, Beachwood, OH (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
A method and apparatus for determining electrical parameters for commissioning a sensor-less permanent magnet synchronous machine uses knowledge of the rotor position to apply balanced pulses along the rotor magnet axis and perpendicular to the rotor magnet axis allowing measurement of q- and d-inductance at multiple current levels without substantial rotor movement.