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Old 04-28-2014, 10:33 PM   #6504 (permalink)
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Originally Posted by MPaulHolmes View Post
The IGBTs Otmar was using were back in 1994 too. Maybe they had a larger power loss than now. I'm not sure, but it's probably not a bad idea to just see how it goes with a finned heatsink. I can always make changes later if necessary. No big deal unbolting things and doing something different if it comes to that.
I am using a finned heatsink on my current controller and do not have any heating issues. Even though your controller is twice the beast I don't think I will be pushing it much harder. So I think I will test the air cooled version.

I do plan to have a dashed mounted temp gauge for the aluminum plate, so I will see in real time if the temperature is rising.

That said, if I did go to fluid cooling I would prefer to make my own cold plate anyway, so that I would have control of the nozzle locations and hose routing.
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