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Focusing on developing high-performance and long-lasting cooling fans
Knowledge about DC cooling fans
Time:
2022-03-16 13:46
Source:
www.gdxxdz.cn
Although a small cooling fan may seem like just a few things, how useful can it be when assembled? We have cooling fans everywhere in our lives, so the strength of cooling fans cannot be underestimated, especially the application range of DC cooling fans is wider. Shanyang DC cooling fan manufacturer would like to ask you, do you understand all of these DC cooling fan knowledge?
1. DC cooling fans are mainly composed of rotors, stators, fan blades, fan frames, and other auxiliary components (such as bearings/retaining rings/magnetic rings/motors, etc.). There should be many semiconductor components in the control circuit, which have now been included in one or more ICs. Some manufacturers have specially designed and manufactured many models of control motor ICs for fan circuit designers to design and use. However, different models of IC control circuits are different, but their main purpose is to provide effective coil functions and DC cooling fan related characteristic requirements for more effective control and protection.
2. The speed signal output from the DC cooling fan circuit is usually in the form of pulses, with each wave head indicating that the fan has rotated once. This 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, such as generating 2, 4, or 6 pulses per revolution. Therefore, it must be processed to form a true speed signal that reflects the fan. If you want to distinguish whether its speed is the real speed or a certain multiple, you can use a tachometer to measure the actual speed and compare it with the displayed data.
3. There are two types of monitoring methods for the DC cooling fan itself: alarm sensor and speed sensor. The alarm sensor can provide an alarm signal when the fan speed is below a certain threshold value, and the speed signal output can achieve real-time monitoring of the fan speed. It can be seen that the larger the air volume, the higher the heat dissipation capacity of the DC cooling fan. This is because the heat capacity ratio of air is fixed, and a larger air volume means that more air can carry more heat per unit time. Under the same air volume, the heat dissipation effect is related to the flow mode of the wind.
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The working principle of cooling fan
Using the principle of electromagnetic induction, the fan uses the Houle induction module as a synchronous detection device, controls a set of circuits, switches the winding electrification sequence, and generates a rotating magnetic field, a mechatronics engineering fan for electronic commutation. The cooling fan has obvious advantages in the aspects of wide speed range, light weight, environmental protection and energy saving, controllability, reliability, environmental endurance and economy, etc. , dominate. The cooling fan is powered by direct current. The DC motor is composed of stator and rotor. The stator has a magnetic pole (winding type or permanent magnet type) , while the rotor has a winding, after the staff electrified it, the rotor also forms a magnetic field (magnetic pole) , there is an angle between the stator and the rotor magnetic pole, in the stator and rotor magnetic field (N-pole and S-pole) under the mutual attraction, is the motor rotation. The cooling fan technician told us to change the position of the brush, you can change the direction of the rotor-stator magnetic pole angle (starting with the stator's magnetic pole, the rotor's magnetic pole is on the other side, and the direction from the rotor's magnetic pole to the stator's magnetic pole is the direction of the motor's rotation) , after this operation, the rotation direction of the motor can be changed.
What are the maintenance methods for DC cooling fans?
Store and maintain in the correct way to extend the service life of the DC cooling fan. The following high-quality fan manufacturers will provide you with detailed maintenance methods for DC cooling fans:
How to choose the right cooling fan or other cooling fans
The design engineers of all motor automation equipment and electronic products that require the use of cooling fans for heat dissipation must determine the air volume required for a specific system's heat dissipation
What is the difference between a DC fan and an AC fan?
The working principle of a DC cooling fan: It is driven by 4102 DC voltage and electromagnetic induction. 1653 converts electrical energy into machinery to drive the fan blades to rotate, relying on the coil and IC to continuously switch, and the induction magnetic ring drives the fan blades to rotate.
Bearing - an important component in the cooling fan
Bearing is an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotational accuracy.
AC fan, mainly used for cooling electronic products, is a universal small AC fan. Widely used in the home appliance industry, mechanical industry, manufacturing equipment industry, and other products with ventilation and heat dissipation requirements.
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