Detection of loss of cooling air to traction motors

Details Detection of loss of cooling air to traction motors Detection of loss of cooling air to traction motors

2005-01-25

2005-01-25

Martin, David (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S471000, C318S472000, C318S473000, C361S023000, C361S024000, C361S025000, C361S027000, C361S030000, C361S037000, C700S079000, C700S177000, C702S132000, C324S701000

Reexamination Certificate

active

06847187

ABSTRACT:
A thermal protection apparatus for an AC traction motor including a stator, a rotor, a blower fan and an inverter includes a method and apparatus for predicting the motor temperature assuming that the blower is operational. The method and apparatus also determines an estimated motor temperature by measuring the motor resistance or the rotor slip. The estimated motor temperatures compared to the predicted motor temperature to determine the condition of the motor cooling system.

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