1
Q
Electrical propulsion motor cooling
A
- The motors and their controls produce large amount of heat.
- This heat can damage motors.
- The raidiated heat can also affect the operation and condition of surrounding items.
2
Q
How is it cooled?
A
The motor is cooled by water cooled air. (Heat exchanger)
This is circulated through a motor.
3
Q
Electrical propulsion motor cooling
Cycle
A
- Cool air is drawn through a filter into the motor.
- This is done by 2 forced ventilation fans.
- The air is then forced over the main poles, armature, commutator and brush gear.
- The cool air absorbs the heat generated in the motor.
- It is exhausted from the motor at the commutator end.
- the air is then forced through a water cooled heat exchanger into the engine room.
4
Q
Cooling cabinet
A
•Cooling for the converter cabinet is an enclosed air system.
•Air is circulated by a fan through a heat exchanger.
•This is not unlike an air-conditioned office or classroom.
•If the heat exchanger fails:
- 2 emergency inlet panels are removed
- this allows air to be drawn into the cabinet by the circulating fan.
•This would be the equivalent of opening windows should the air-conditioning in the office or classroom fail.
