Quote:
Originally Posted by Grim Tuesday
how are CIM and BAG motors cooled
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The large thermal mass of the structures inside the motor, as Art mentioned, acts internally as a sort of large heat "sponge" or "diaper" absorbing the heat and preventing short periods of high current from producing unacceptably high temperatures within the motor.
Radiation, conduction, and convection eventually move that heat out of the motor:
Radiation: the outer case of the motor emits radiant heat (electromagnetic radiation; photons)
Conduction: heat is conducted away from the motor by the metal to which it is mounted.
Convection: the air around the motor gets heated by contact with the outer case of the motor, and the heated air rises away from the motor and is replaced with cooler air.