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:
Jan. 07, 2014
Filed:
May. 31, 2011
Mark Hartman, Dunlap, IL (US);
Robert Lindsey, Peoria, IL (US);
Jackson Wai, Dunlap, IL (US);
Jesse Gerdes, Dunlap, IL (US);
Mark Hartman, Dunlap, IL (US);
Robert Lindsey, Peoria, IL (US);
Jackson Wai, Dunlap, IL (US);
Jesse Gerdes, Dunlap, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A method of estimating rotor speed of a generatorhaving a rotorand a statoris provided. The method may provide a source current to the stator, determine a relative rotor speed based on a sensor signal provided by a rotor speed sensor, determine a relative rotor position corresponding to the relative rotor speed, determine an absolute rotor position based on the sensor signal and phase currents, and calibrate the sensor signal based on an offset between the relative rotor position and the absolute rotor position.