G'day All
This is just a little post to add a datapoint.
We built a couple of pieces of industrial equipment, each one based
around a big air cooled transformer.
The air on site is badly contaminated (a foundry) so we couldn't blow
the outside air through the transformers and expect everything to stay happy.
Of the two units, one is air cooled and one is water cooled. Both
units have internal fans that circulated air through the transformer
and through a ducted heatsink (just goes around in a loop).
The heatsink is cooled (the air cooled one has a second heatsink that
is bonded to it, blowing outside air through the fins of the second
heatsink, back to outside again, the watercooled one has a copper
plate/tube cold plate on the heatsink).
This is getting rid of over 1kW of waste heat when everything is
working hard, keeping the thermal switches below their 90 degrees C cutoff.
If you have a sealed motor bay, it would be entirely possible to duct
the motor cooling air back through a water-cooled heatsink, and keep
the motor nice and cool, if done right.
Hope this helps
Regards
[Technik] James
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