Method for controlling fan speed

Details Method for controlling fan speed Method for controlling fan speed

2008-09-05

2010-11-30

Masih, Karen (Department: 2837)

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Field control, or field and armature control, by analog...

C318S463000, C318S472000

Reexamination Certificate

active

07844170

ABSTRACT:
A method for controlling a fan speed is disclosed. The fan cools a CPU in a computer. The method includes defining a CPU-max-temp value of a CPU, such that the first fan speed is linearly enhanced with the increase of a real temperature value of the CPU, when the real temperature value of the CPU is lower than the CPU-max-temp value, and changing the CPU-max-temp value to a higher CPU-max-temp value in a basic input output system. A second fan speed is linearly enhanced with an increase of the real temperature value, when the real temperature value is lower than the higher CPU-max-temp value. The second fan speed is less than the first fan speed at the real temperature value.

REFERENCES:
patent: 2008/0137240 (2008-06-01), Yu et al.

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