yes, besides the electrical, and also audible noise, a brushed motor would
wear out its brushes. any motor that's intended to be on most or much of
the time, and have a long maintenance free service life, is going to be
brushless. Most fans used in pcs are going to be brushless running off 12v.
You can pwm the power supply to do speed control, its done all the time.
On February 2, 2021 1:43:45 PM John Vaughters via TriEmbed
<[email protected]> wrote:
Computer fans are almost always brush-less, actually never seen a brushed
one. Because the electrical noise is too high. She 3 pin motors are simply
two power pins plus one tachometer pin, which you generally only want to
determine if the fan is failing. I could be wrong about this part, but I
expect that they are single voltage and reducing the voltage may or may not
affect the speed much and possibly could damage the fan over long use.
However, I seem to remember some schemes to make 3 wire fans speed
controlled. it's worth a look online I suppose.
John Vaughters
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