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:
Apr. 18, 2000
Filed:
Apr. 18, 1997
Applicant:
Inventor:
Robert Stokes, Hughes Springs, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324772 ;
Abstract
Apparatus and method to determine the intensity of a residual magnetic field that accumulates on the rotor of a dynamoelectric machine to identify stator and rotor anomalies. A dynamoelectric machine, such as an induction motor, has a rotor which becomes magnetized with use. This magnetism tends to skew inductance tests which are used to predict problems developing within the motor. The apparatus and method measure the accumulated magnetic field of a motor rotor, and adjust conventional inductance tests to yield more accurate results.