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:
Feb. 03, 2015
Filed:
Nov. 29, 2012
Electro-motive Diesel, Inc., LaGrange, IL (US);
Brett Michael Nee, Germantown Hills, IL (US);
Garrett Tyler Nielson, Chicago, IL (US);
Electro-Motive Diesel, Inc., LaGrange, IL (US);
Abstract
A system for estimating a rotor position may include a synchronous machine, including at least one stator winding pair configured to create a magnetic field when an input voltage is applied and a rotor having a field winding and configured to rotate within the magnetic field created by the at least one stator winding pair. The system may include a phase detector configured to determine a phase difference between the input voltage and a field voltage induced in the field winding of the rotor. The system may also include a processor configured to receive a signal from the phase detector indicative of the phase difference between the input voltage and the field voltage, and to estimate the rotor position based on the phase difference.