andyme said:
hat do you think of my idea to use "thermal compound" in order to "connect" the motor to the housing?
I am thinking that this may transport the heat to the case and then additionally one could add some heat pipe or so outside....this could increase the operational range for the motor.
Thermal cream is ~10x still air, after the loss of radiation, but not terribly good. It is the most god-awful messy stuff in small doses.
Blackening the inside of the cover and motor with a thinnest possible layer of matte black paint improves the radiation transfer, which can be a significant component approx equal to still air conduction - clean and easy to do the cover. (paint should be just thick enough to blacken, but no thicker)
Still air (which thin air films are) has poor conductivity, but far better if you disturb it.
Putting a tiny fan inside to circulate the air might help.
This store has some tiny fans. A
20x20 centrifugal blower looks like it would fit nicely between the controller and the motor on the topside, and circulate air around the motor, while the
30x30 might be a snug fit at the bottom - a
40x40x10 fan almost fits.