Fan control system and method for modulating rotation speed of fan

Abstract

The invention discloses a fan control system and method for modulating rotation speed of a fan. The fan control system comprises a host machine device, a basic input and output system, an output interface, a fan device, a fan driving unit and a fan rotation speed modulation unit, wherein the host machine comprises a detection unit for detecting the assembly state to output detection signals; the basic input and output system is coupled with the detection unit, is used for storing the corresponding relationship between the detection signals and the fan rotation speed, and is used for generating rotation speed signals according to the detection signals and the corresponding relationship; the output interface is coupled with the basic input and output system, and is used for outputting rotation speed signals; the fan device is coupled with the output interface and comprises a fan; the fan driving unit is used for driving the fan; and the fan rotation speed modulation unit is used for controlling the fan driving unit to drive the fan at the second fan rotation speed when a first fan corresponding with the corresponding relationship of the rotation signals output by the output interface is at the first range, wherein the second fan rotation speed is out of the first range. According to the invention, the stability of a computer operation system can be improved.

Description

technical field [0001] The invention provides a fan control system and method for modulating the fan speed, especially a fan control system and a fan control method for avoiding a specific resonance frequency by modulating the fan speed. Background technique [0002] With the advancement of technology, the functions of consumer electronic products are becoming more and more abundant, so the requirements for performance are also getting higher and higher. However, high performance means high energy consumption, and may even cause problems such as resonance, noise, and heat dissipation. For example, the increase in performance will lead to a corresponding increase in the heat generated by each component when performing various functions. If the heat generated by the internal components of an electronic product cannot be efficiently removed, it will affect the work of the electronic product. Stability and work efficiency may even lead to mechanical failure, resulting in the lo...

AI Technical Summary

Problems solved by technology

If the vibration frequency of the fan resonates with the casing, it will cause the following problems: Unpleasant resonance sound; sound pressure, sound power, and sound quality exceed the test specifications; it is necessary to modify the casing structure to weaken the resonance intensity or change the natural frequency of the casing To improve the resonance problem caused by the fan, which leads to an increase in manufacturing costs; and the modification of the casing structure requires mold repair or re-opening of the mold, resulting in delays in mass production, etc.

If the vibration frequency of the fan resonates with the rotation frequency of the hard disk platter, it will cause the following problems: the read / write rate of the hard disk head will decrease, which will seriously lead to failure to read and write; the read / write rate of the hard disk cannot meet the test specifications; and the service life of the hard disk will be reduced. short wait

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