PROGRAMMABLE CLOSED LOOP FAN CONTROL

摘要

A fan control system (100) and method that maintains the operating temperature of computer and electronic devices or components at about a predetermined control level to minimize power consumption and audible noise. The fan control system (100) is a programmable closed loop system including a temperature sensor (116), first (102) and second (104) fan controllers, and a fan/motor assembly (112) including a power converter (110), a motor and fan (111). The first fan controller (102) provides programmable acceleration/deceleration of the fan during an initial fan spin up, and the second fan controller (104) runs the fen only as fast as necessary to keep the sensed temperature level of a computer device as close as possible to the predetermined control level, thereby minimizing the power consumption of the system and the audible noise of the fan.