DC cooling fan, Is a kind of heat dissipation device that converts electrical energy into machinery through DC voltage and electromagnetic induction to drive the rotation of the fan blades. It has many characteristics such as good heat dissipation effect, fast speed, and long service life, and is widely used. So you have to understand the DC cooling fan is how to run? The following is a brief introduction by the small editor.

Operation steps of DC cooling fan:

1. The DC cooling fan is mainly composed of a rotor, a stator, a fan blade and other auxiliary components (such as bearings // retaining rings, etc.). There should be many semiconductor components in the control circuit, which are now stored in one or more ICs. Some manufacturers have specially designed and manufactured many types of control motor ICs for fan circuit design and use. However, different types of IC control circuits are different, but their main purpose is to provide effective functions of coils and related characteristic requirements of DC cooling fans for more effective control and protection.

2. The speed signal output from the DC cooling fan circuit is usually in the form of pulses, and each wave head indicates that the fan rotates once. Such a signal can be directly provided to the host for display through the data bus. The speed signal output by some DC cooling fans is not the true speed of the fan, but a multiple of the speed. For example, 2, 4 or 6 pulses are generated per revolution, so it must be processed to form a signal that reflects the true speed of the fan. If you want to distinguish whether the speed is the real speed or a multiple, you can use the tachometer to measure the actual speed, and then compare with the displayed data.

3. The monitoring method of the DC cooling fan itself has two types: alarm sensor and speed sensor. The alarm sensor can give an alarm signal when the fan speed is lower than a certain threshold value, and the speed signal output can realize the real-time monitoring of the fan speed. It can be seen that the greater the air volume, the higher the heat dissipation capacity of the DC cooling fan. This is because the heat capacity ratio of air is certain. A larger air volume, that is, more air per unit time, can take away more heat. With the same air volume, the heat dissipation effect is related to the way the wind flows.

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