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2. Computer fan control - Wikipedia

   en.wikipedia.org/wiki/Computer_fan_control

   Increasing the voltage [4] over the default 12 V can be achieved by e.g. connecting the −12 V or −5 V power line instead of the ground wire in the fan connector, and by connecting the 5 V power line in the +12 V input of the fan connector. Through this procedure, 10, 17 and 24 V voltages can be achieved, with voltages exceeding 12 V being ...

3. Computer fan - Wikipedia

   en.wikipedia.org/wiki/Computer_fan

   A corresponding wire stripper and crimping tools are also required. Four-pin Molex connector KK family This is a special variant of the Molex KK connector with four pins but with the locking/polarisation features of a three-pin connector. The additional pin is used for a pulse-width modulation (PWM) signal to provide variable speed control. [26]

4. Fan coil unit - Wikipedia

   en.wikipedia.org/wiki/Fan_coil_unit

   DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required. Up to a signal voltage of 2.5 Volts (which may vary with different fan/motor manufacturers) the fan will be in a stopped ...

5. Pulse-width modulation - Wikipedia

   en.wikipedia.org/wiki/Pulse-width_modulation

   Variable-speed computer fan controllers usually use PWM, as it is far more efficient when compared to a potentiometer or rheostat. (Neither of the latter is practical to operate electronically; they would require a small drive motor.) Light dimmers for home use employ a specific type of PWM control.

6. Regulated power supply - Wikipedia

   en.wikipedia.org/wiki/Regulated_power_supply

   Heat sinks may be mounted externally or internally. Heat sinks are silent, whereas fans are more effective in cooling. Fan speed may adjust based on temperature or output current, the former of which cools faster while idle or low throughout intermittent power output, whereas the latter provides acoustic feedback of how much current is output ...

7. Brushless DC electric motor - Wikipedia

   en.wikipedia.org/wiki/Brushless_DC_electric_motor

   Brushless motors are commonly used as pump, fan and spindle drives in adjustable or variable speed applications as they are capable of developing high torque with good speed response. In addition, they can be easily automated for remote control. Due to their construction, they have good thermal characteristics and high energy efficiency. [20]