Patent ID: 8963465
Filing Date: 2015-02-24
Classification: F04D,Y02B

Abstract:
1. A fan control system for a computer system having a fan, the fan having a first pressure-quantity setting and a second pressure-quantity setting, and under a predetermined rotating speed, the fan having a first pressure-quantity curve for the first pressure-quantity setting and a second pressure-quantity curve for the second pressure-quantity setting, the fan control system comprising: a controller for providing a logical pressure-quantity control signal to the fan so as to set the fan to operate in one of the first pressure-quantity setting and the second pressure-quantity setting, wherein after the pressure-quantity control signal is provided, the controller further provides a rotating speed control signal to the fan so as to control a rotating speed of the fan, wherein the rotating speed control signal is a pulse width modulation signal, and wherein the controller provides the pressure-quantity control signal and the rotating speed control signal to the fan via the same communication port.