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24 volt dc fan pwm control

24 volt dc fan pwm control

24 volt dc fan pwm control

(OP)
Hi,

I'm in the design process of a speed control for 3 24 volt dc fans with sensors input to a microcontroler. I'm using the pwm output of the microcontroler to control the 3 fans speed. I'm using a 24volt power supply for the fan using about 150 watt. My question is : Is there any reason I should use a different power supply for the microcontroler for protection if the power supply of the fans is already isolated from the line?

RE: 24 volt dc fan pwm control

No different supply is needed.  That will be fine.  You will want a little filtering as the fans could generate some noise when being PWM'd.

Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com

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