Electricity: motive power systems – Automatic and/or with time-delay means – Responsive to thermal conditions
Patent
1992-04-03
1994-03-29
Ip, Paul
Electricity: motive power systems
Automatic and/or with time-delay means
Responsive to thermal conditions
318146, 318147, 322 3, 322 7, 322 34, 290 40C, 290 52, 361 20, H02K 904, H02K 924
Patent
active
052988422
ABSTRACT:
In a thermal overload protection system three system variables are sensed and provide the inputs required for a calculation conducted in real time at one second intervals. The system variables include ambient inlet air temperature to the alternator, alternator stator winding embedded sensor temperature, and traction motor armature current. A traction motor current limit is calculated using the inlet air temperature and the sensor temperature. The thermal overload is then controlled in response to the traction motor current.
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McGrath Robert G.
Vanek Laurence D.
General Electric Company
Ip Paul
Payne R. Thomas
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