Patent ID: 11968801
Assignee: INVENTEC (PUDONG) TECHNOLOGY CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC H  G  Y | IPC G  H

Claim 4:
5. A fan control method, which is carried out by a fan control system for use in a server system, the server system comprising a power supply unit, the fan control system comprising: a first monitoring and protection chip electrically connected to the power supply unit and configured to receive an operating power in a working state of the server system; a second monitoring and protection chip electrically connected to the power supply unit and configured to receive a standby power in a shutdown state of the server system; a switch electrically connected to both the first and second monitoring and protection chips; a plurality of fans all electrically connected to the switch; and a complex programmable logic device electrically connected to the first monitoring and protection chip, the second monitoring and protection chip, the switch and the plurality of fans, wherein the complex programmable logic device is directly connected to the plurality of fans, and the fan control method comprises the steps of:
a) activating the second monitoring and protection chip by the complex programmable logic device in the shutdown state of the server system;
b) receiving the standby power at the second monitoring and protection chip;
c) switching the switch under control of the complex programmable logic device so that the plurality of fans are connected to the second monitoring and protection chip, receive the standby power therefrom and run at a standby power level;
d) activating the first monitoring and protection chip by the complex programmable logic device when the server system is switched from the shutdown state to the working state;
e) receiving the operating power at the first monitoring and protection chip; and
f) switching the switch under control of the complex programmable logic device so that the plurality of fans are connected to the first monitoring and protection chip, receive the operating power therefrom and run at a normal power level that is higher than the standby power level.