Thermal measuring and testing – Temperature measurement – Combined with diverse art device
Patent
1997-12-30
2000-03-28
Berhane, Adolf Deneke
Thermal measuring and testing
Temperature measurement
Combined with diverse art device
374153, 374154, 374166, 318471, 318473, 361 25, G01K 112
Patent
active
060422653
ABSTRACT:
Rotor temperature in induction motors is estimated without the need for any direct temperature sensors, by using only computer calculations based on data readily available in the motor control center. Thus for any given motor, it is generally possible to predetermine a relationship between rotor temperature and rotor resistance, so that by determining rotor resistance, rotor temperature can be calculated. Rotor resistance, in turn, can be calculated from measured information relating motor slip and motor torque. Any of several methods can be employed for determining torque and slip. Temperature estimation can be obtained by use of equivalent circuit methods, and additional relationships can be obtained from a simplified equivalent circuit.
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Dymond James Henry
Kliman Gerald Burt
Berhane Adolf Deneke
General Electric Company
Snyder Marvin
Stoner Douglas E.
Tibbits Pia
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