[Max Lobovsky]

Originally Posted by Andrew Schuetze

What I am hearing from replys to this and another post is that adding a cooling fan outside the case of a motor is of no consequence. Cooling by an external fan does nothing to prevent damage inside.
http://www.chiefdelphi.com/forums/sh...ad.php?t=33313

Why is it that people keep saying that? Even at a reasonable load, the motor can easily be outputting 100+watts of heat. Even if the motor can radiate that safely itself, it is going to be hotter (significantly) than if it had some active cooling. Now say you do have a short spike in heat output. We can all agree that we would much rather have their cooler motor to start with spike, then the hotter one.

Sure its a bad idea to rely soley on cooling in your design to protect your motors, but you can definitley get more out of your motors if you cool them.