Banebots RS775-12 and 775-18

[Grim Tuesday]

Thanks for all the help everyone, this is why I love the FIRST community.

One more question: If the Banebots and Fisher Price motors are fan cooled, how are CIM and BAG motors cooled?

[artdutra04]

Originally Posted by Grim Tuesday

Thanks for all the help everyone, this is why I love the FIRST community.

One more question: If the Banebots and Fisher Price motors are fan cooled, how are CIM and BAG motors cooled?

Thermal mass.

The CIM, MiniCIM, and BAG motors are all sealed motors with a high thermal mass. All this metal helps to absorb the heat generated by the motor, in the same way a computer heat sink works.

[Ether]

Originally Posted by Grim Tuesday

how are CIM and BAG motors cooled

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.