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:
Sep. 26, 2017
Filed:
Feb. 19, 2015
Applicant:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Inventors:
Jingbo Liu, Grafton, WI (US);
Thomas Nondahl, Greenfield, WI (US);
Peter B. Schmidt, Franklin, WI (US);
Takayoshi Matsuo, Brown Deer, WI (US);
Timothy M. Rowan, Wauwatosa, WI (US);
Assignee:
Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B 11/28 (2006.01); H02P 6/18 (2016.01); H02P 27/08 (2006.01); H02P 21/18 (2016.01);
U.S. Cl.
CPC ...
H02P 6/18 (2013.01); H02P 21/18 (2016.02); H02P 27/08 (2013.01);
Abstract
Motor drives, methods and estimation systems are presented for estimating a rotor position of a motor load in which four sets of inverter output current samples obtained at four different sample times in a given inverter PWM cycle are converted into a corresponding stationary reference frame current value pairs, and the rotor position estimate is computed according to the stationary reference frame current values.