Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1998-01-09
1999-11-23
Do, Diep N.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324529, 324772, 324240, G01R 3134, G01R 3106
Patent
active
059906880
ABSTRACT:
The method consists in positioning a probe in front of a pair of teeth provided on the face of the magnetic circuit of an electric machine. The probe has spaced apart magnetic prong portions having respective end faces adapted to match the teeth of the pair with the end faces in registry with the teeth. The prong portions are respectively provided with an excitation winding and a measurement winding. The excitation winding is excited to induce a magnetic flux in a test zone formed of the teeth in front of the probe and a portion of the magnetic circuit extending therebetween. The current flowing in the excitation winding and the voltage across the measurement winding are measured for calculating a resulting power which is indicative of the condition of the test zone. The apparatus is formed of the probe and electronics carrying out the above functions.
REFERENCES:
patent: 4681729 (1987-07-01), Pendleton et al.
patent: 4996486 (1991-02-01), Posedel
patent: 5059912 (1991-10-01), Trampert
patent: 5341095 (1994-08-01), Shelton et al.
Bourgeois Jean-Marc
Lalonde Fran.cedilla.ois
Do Diep N.
Hydro-Quebec
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