Franklin Murphy

US Patent:

46028722, Jul 29, 1986

Filed:

Feb 5, 1985

Appl. No.:

6/698488

Inventors:

Franklin T. Emery - Orlando FL
William G. Craig - Casselberry FL
Franklin J. Murphy - Oviedo FL

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

G01K 1300

US Classification:

374152

Abstract:

A generator having stator windings which are water cooled includes a plurality of sensors each for measuring the temperature of cooling water as it is discharged from respective sections of the stator windings and prior to its collection in a common manifold. The outputs of the sensors are combined to obtain an average reading and during an initialization process, each sensor reading is subtracted from the average to derive a correction factor for that particular sensor, for that particular average. The generator is operated so that other averages are selected for the calculation of other sensor correction factors. When operating on line, the correction factors are utilized to obtain a value for a percent of average coil temperature in accordance with the relationship: ##EQU1## where T is the temperature indication provided by the sensor, AVG is the average of all of the sensor readings, and CF is the appropriate correction factor for that sensor for that average.