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How does a PWM fan controller work?

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How does a PWM fan controller work?

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In short, PWM operates like a switch which constantly cycles on and off, thereby regulating the amount of power the fan or pump motor gains. The PWM system that is used for controlling fans and pumps works with the motor, either getting +12V (full power) or 0V (no power). ... So, the motor is being fed impulses of power.Jul 14, 2016

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