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. 30, 2013
Filed:
Jun. 26, 2012
Jingbo Liu, Grafton, WI (US);
Semyon Royak, Beachwood, OH (US);
Mark M. Harbaugh, Richfield, OH (US);
Thomas A. Nondahl, Wauwatosa, WI (US);
Peter B. Schmidt, Franklin, WI (US);
Jingbo Liu, Grafton, WI (US);
Semyon Royak, Beachwood, OH (US);
Mark M. Harbaugh, Richfield, OH (US);
Thomas A. Nondahl, Wauwatosa, WI (US);
Peter B. Schmidt, Franklin, WI (US);
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Abstract
The present invention provides a simple, robust, and universal position observer for use with sensorless synchronous machines. The observer may be implemented using an equivalent EMF model of a synchronous machine or, alternately, using a sliding mode controller based on the equivalent EMF model of the synchronous machine. The observer may be used on any type of synchronous machine, including salient or non-salient pole machines such as a permanent magnet, interior permanent magnet, wound rotor, or reluctance synchronous machine. The observer provides low sensitivity to parameter variations and disturbances or transient conditions in the machine. In addition, no knowledge of speed is required as an input to the observer and an estimated position may be calculated using a subset of the machine parameters.