Electric Power Research Institute Incorporated

Ontario Hydro

Frank Y Chu

Blake A Lloyd

Harry Eugen Ruda

Howard G Sedding

Lennart Mannik

Robert M Cilic

Samuel B Peralta

A radioisotope-powered semiconductor battery comprises a substrate of a crystalline semiconductor material, the material having at least one degree of confinement, and a radioactive power source comprising at least one radioactive element. The power source is positioned relative to the substrate to allow for impingement of emitted particles on the substrate. The semiconductor material may be electronically, structurally or chemically confined. The radioactive element is preferably impregnated within or immediately adjacent the semiconductor material.

Radioisotope-powered semiconductor battery

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

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.

Thermal life indicator

Growing community of inventors

Islington, Canada

Frank Y Chu