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:
Nov. 23, 1999
Filed:
Jan. 29, 1999
Applicant:
Inventors:
Ajith Kuttannair Kumar, Erie, PA (US);
Kevin Michael Jones, Erie, PA (US);
Assignee:
General Electric Company, Erie, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B61C / ;
U.S. Cl.
CPC ...
318490 ; 104307 ; 105 2605 ;
Abstract
A method for detecting the occurrence of actual locked axle conditions in a vehicle propelled by AC motors includes the steps of detecting a potential locked axle condition, which may be induced due to a faulty speed sensor; setting the frequency of the inverter which controls operation of the AC motor coupled to the potentially locked axle at a predetermined frequency value; varying the level of electromagnetic flux in the motor; measuring torque produced by the motor; and determining based on the measured torque whether or not the potential locked axle condition is an actual locked axle condition.