Rotating speed control system and method of server fan

Abstract

The invention discloses a rotating speed control system and a method of a server fan. The system comprises a fan rotating speed control unit for obtaining load utilization rate information of the system and adjusting the rotating speed of the fan according to the change tendency of the total load utilization rate of the system. The system is provided with the fan rotating speed control unit for realizing slow switching of the rotating speed transition of the fan and quick and stable cnvergence of the rotating speed of the fan based on the temperature prediction control. Meanwhile, a temperature distribution model of a server main board is built; different important heat dissipating areas are divided in a main board area; the different fan rotating speed control is adopted to realize overall heat dissipating optimization of the server main board; and the reliability of the system is guaranteed.

Description

technical field [0001] The invention belongs to the field of server heat dissipation, and in particular relates to a server fan speed control system and method. Background technique [0002] The heat dissipation of the server mainly depends on the driving of the airflow by the fan. At present, the fan is mainly directly controlled by the BMC chip on the main board. By collecting the temperature change on the main board, the change of the fan speed can be quickly adjusted to realize the follow-up adjustment of the temperature. In addition to the control of the cooling effect In addition to attention, more and more attention has been paid to the noise control of the fan. The fan generates high-decibel sound noise and voltage signal noise during the system startup and operation, which brings great impact on the equipment vibration failure of the entire system and the noise pollution of the surrounding environment. Impact. [0003] In the current server system fan operation, wh...

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Problems solved by technology

[0002] The heat dissipation of the server mainly depends on the driving of the airflow by the fan. At present, the fan is mainly directly controlled by the BMC chip on the main board. By collecting the temperature change on the main board, the change of the fan speed can be quickly adjusted to realize the follow-up adjustment of the temperature. In addition to the control of the cooling effect In addition to attention, more and more attention has been paid to the noise control of the fan. The fan generates high-decibel sound noise and voltage signal noise during the system startup and operation, which brings great impact on the equipment vibration failure of the entire system and the noise pollution of the surrounding environment. Impact

[0003] In the current server system fan operation, when the server is turned on and the temperature of the motherboard jumps rapidly, the fan speed is directly and greatly adjusted. At this time, the fan undergoes a process of acceleration and deceleration, which produces loud sound and signal noise. The overall stability of the system has a greater impact. The current system fan operation control method has major disadvantages: First, the rapid adjustment of the system fan speed, resulting in the rapid switching speed of the fan motor. During the acceleration and deceleration process, the fan sound and signal noise The fan speed has increased rapidly, and there is a situation of over-adjustment of the fan speed. It is necessary to repeatedly correct the speed and gradually stabilize it. In the process, it will have a great impact on the power supply. The noise of the power supply is relatively large, which will easily lead to the failure of signal transmission of key sensitive components such as memory; It is because the server fans are installed in a relatively fixed position, installed in rows, and the speed is also uniformly regulated. This uniform layout and strategy prevents the airflow brought by the fans from being efficiently applied to the main heat dissipation components. Invalid output, resulting in inefficient work of the fan and increase of system power consumption

In view of the problems of high sound and signal noise and low fan efficiency during the use of the current fan, in order to ensure the efficient and stable operation of the server fan cooling system, it is particularly important to realize the optimal design of the fan speed during the use of the actual server system fan, and has become One of the key factors that determine the performance advantage of the server

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