Fan, control unit for fan, and fan control method

Abstract

The present invention mainly provides a fan for solving the problem of poor cooling effect of the system due to abnormality of the fan. The fan may include a stator pole rotatably coupled to the fan wheel, and the stator pole is electrically connected with the driving unit. The driving The control unit is electrically connected to the driving unit. The control unit receives a speed control signal for driving the fan. The fan is driven by the stator poles. Wheel and controlling the rotation speed of the fan wheel. The control unit generates a braking signal according to the rotation speed or the speed control signal to brake the fan wheel. In this way, the above problems can be solved.

Description

technical field [0001] The invention relates to a fan, in particular to a fan which can prevent the fan wheel from rotating freely in response to abnormal conditions. Background technique [0002] The existing fan can drive the fan wheel to rotate to generate airflow to assist heat dissipation, such as figure 1 As shown, the existing heat dissipation system can be equipped with multiple fans F1~F5 in an electronic device H at the same time. The cold air from the outside takes away the heat inside the electronic device H, such as: waste heat generated by the operation of the central processing unit in the computer, etc., so as to improve the heat dissipation effect and prevent the electronic device from overheating and malfunctioning. [0003] However, when either fan (such as figure 1 F5) abnormal, the abnormal fan F5 is not controlled, and the fan blades can rotate freely. Therefore, when the airflow generated by the other normally operating fans F1~F4 is large enough, th...

AI Technical Summary

Problems solved by technology

[0003] However, when either fan (such as figure 1 F5) abnormal, the abnormal fan F5 is not controlled, and the fan blades can rotate freely. Therefore, when the airflow generated by the other normally operating fans F1~F4 is large enough, the airflow will drive the abnormal The fan blades of the fan F5 rotate in reverse, causing the cold air to flow countercurrently before the heat exchange is complete, resulting in poor overall cooling effect

[0004] In order to solve the above problems, although the speed of the other normal fans F1~F4 can be further increased in order to increase the air flow to improve the heat dissipation effect, but the increase of the air flow will increase the speed of the abnormal fan F5, causing the flow of countercurrent air to increase. The increase, in addition to failing to effectively improve the heat dissipation effect, will also cause the normal fan to overload and shorten the service life

Images