Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1997-07-24
1999-05-25
Do, Diep N.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324772, 324545, G01R 3106
Patent
active
059072440
ABSTRACT:
A method and apparatus for detecting winding errors in electric motor stators having a plurality of field windings is disclosed. The method involves the steps of applying a current source to at least one of the field windings to generate a magnetic field within the stator, measuring the polarity and strength of the field for each winding at preselected radial and angular positions about a circumference of the stator bore, and comparing the measured values to recorded values of radially and angularly corresponding measurements for a reference motor stator. Preferably, the current source is applied to each of the windings in succession. The apparatus includes a terminal block, switch, and power supply to connect a source of current to each field winding in succession to generate a magnetic field within the stator. In one embodiment, the apparatus includes a magnetic sensor mounted at a predetermined radial position for rotation on a shaft, and an encoder proximate the shaft to determine the angular position of the shaft. In a second embodiment, the apparatus includes a plurality of magnetic sensors mounted at preselected radial and angular positions about an arbor or drum sized to fit within the stator. Both embodiments include means for comparing the measured magnetic field values to recorded values of radially and angularly corresponding measurements for a reference motor stator.
REFERENCES:
patent: 1687637 (1928-10-01), Reynders
patent: 4658213 (1987-04-01), Finley
patent: 5218860 (1993-06-01), Storar
patent: 5252915 (1993-10-01), Sedding et al.
patent: 5341095 (1994-08-01), Shelton et al.
"Direction Test Considerations", "Direction Test Description", Automation Technololgy, Powerpoint presentation 1996 Motor Manufacturing Conference, Aug. 1996, Dayton, Ohio.
STS-3500 Stator Test System product brochure, Automation Technology.
Stator Test System STS-700/3000 Series Automatic Test System product brochure, Automation Technology (undated).
Crabill Monty L.
Storar Robert C.
Automation Technology Inc.
Do Diep N.
LandOfFree
Method and apparatus for detecting winding errors in an electric does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting winding errors in an electric, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting winding errors in an electric will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-403083