Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1996-02-09
1997-12-23
Dougherty, Thomas M.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 53, 310 68C, 374152, 364557, 36457303, 36457304, H02K 1100
Patent
active
057010447
ABSTRACT:
In order to monitor the temperature of an electric generator, the temperatures of a plurality of rods of a stator winding of the generator being cooled by a coolant, preferably a water-cooled stator winding, are detected. In order to detect a temperature deviation in each winding rod, a measured actual or real temperature value of each winding rod is compared with a reference value for the winding rod. The reference value is derived from parameters previously determined for the winding rod by reference measurement and from presently or currently detected, operation-relevant parameters of the generator. The parameters for each winding rod are derived from a temperature of the winding rod detected during the reference measurement and from a number of functions that corresponds to the number of parameters. The functions are derived from operation-relevant parameters detected during the reference measurement in different states of operation of the generator. The temperature may thus be monitored while operation-relevant influencing variables, such as the stator current of the generator, are taken into account.
REFERENCES:
patent: 3843872 (1974-10-01), Shimomura
patent: 4291355 (1981-09-01), Dinger
patent: 4547826 (1985-10-01), Premerlani
patent: 4602872 (1986-07-01), Emery et al.
patent: 4823290 (1989-04-01), Fasack et al.
patent: 5097669 (1992-03-01), Hargrove et al.
Emshoff Horst-Werner
Intichar Lutz
Scheil Hermann
Dougherty Thomas M.
Greenberg Laurence A.
Lerner Herbert L.
Mullins B.
Siemens Aktiengesellschaft
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