Quote:
Originally Posted by Alan Anderson
Unless you can fill the CIM itself with some sort of thermally conductive (but electrically insulating) fluid, putting a heat sink on its case is less effective than you might think. The power is dissipated in parts that have very little ability to transfer the heat to the outside. To make its way to the outside, most of the heat needs to go through the motor shaft.
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Richard Wallace has conducted and reported some excellent tests documenting this. I'll post a link later unless someone else beats me to it.