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Old 22nd Feb 2021, 4:47 pm   #2
duncanlowe
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Join Date: Jan 2016
Location: Stafford, Staffs. UK.
Posts: 1,098
Default Re: Running DC brushless PC cooling fans

I wouldn't be so sure. I experienced an application where a 12v computer fan was run over voltage. In the initial design it was OK, but they upped the internal system voltage. The fan ran OK, but must have been running hot internally as it only took a few minutes before problems started, as in it started to smoke. It had got hot enough that the fan hub had softened so even after it all calmed down, the fan was physically stuck too because it was now eccentric.

The fan wasn't new and had been working fine as part of an original model that we were upgrading. The cost of the upgrade was priced on re-use of a number of components. The fan grille was virtually the only part re-used in the end.
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