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Speed control device of cooling fans and method of control thereof

[Category : - Computers and computer accessories ]
[Viewed 53 times]

A speed control device for a cooling fan and a method of control thereof are disclosed, in which temperature and noise among other factors are taken into consideration, whereby changes to the voltage/current of power supply provided to the cooling fan are used to adjust the speed of the cooling fan. The speed is reduced as much as possible within the permissible range of system temperature to minimize the noise generated from the cooling fan. When the temperature exceeds the permissible range, the speed of the cooling fan is accelerated to reduce system temperature.