Electric Power Research Institute Incorporated

Ontario Hydro

Blake A Lloyd

Howard G Sedding

Frank Y Chu

Robert M Cilic

James Penman

An electronic rotor temperature sensor which is encased in a plug or housing which can be removably mounted in the rotor of a generator or motor and transmit r.f. signals encoded with temperature information.

Electronic rotor temperature sensor

In order to determine the occurrence of a stator fault in an induction motor during operation of the motor, the axial leakage flux is monitored during operation of the motor. The occurrence of a stator fault is detected by observing a change in selected harmonic components of the axial leakage. The angular position of the fault with respect to a datum position is determined by noting and recording changes in the axial leakage flux at a plurality of positions distributed symmetrically around the axis of the motor and computing the angular position by triangulation. The axial leakage flux is detected by individual search coils located at said plurality of positions.

Method and apparatus for detecting stator faults in rotary

A method for continuously determining the consumed insulation life of an electrical winding in a rotating machine is described incorporating the steps of selecting constants based on the class of insulation material and rotating machine power rating, measuring the temperature of the insulation over time, determining the consumed life of the insulation for consecutive periods of time and summing the consumed life. The invention overcomes the problem of determining consumed life of electrical insulation.

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Mississauga, Canada

Blake A Lloyd