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[Do you know about heat dissipation] What is the difference between DC fan and AC fan

Release time:

2019-06-03

With the increasing market demand for fans, it has also been applied in various occasions and industries. Although DC fans and AC fans can be seen everywhere in life, many people are not very clear about the characteristics of these fans, so the following is a brief introduction to the differences between these fans. First, the power supply is different. DC fans work by direct current, while AC fans run by alternating current. Second, the working principle is different: the principle of the DC fan is to convert electrical energy into mechanical energy through DC voltage and electromagnetic induction to drive the blades to rotate quickly, relying on the coil and IC to continuously switch, and the induction magnetic ring drives the blades

With the growing market demand for fans, it has also been used in various occasions and industries, although nowDC FanAnd AC fans can be seen everywhere in life, but many people are not very clear about the characteristics of these fans, so let's introduce the difference between these fans.
First, the power supply is different.
DC fans work by direct current, while AC fans run by alternating current.
Second, the working principle is different:
The principle of the DC fan is to convert electrical energy into mechanical energy to drive the blades to rotate quickly through DC voltage and electromagnetic induction. Relying on the continuous switching of the coil and IC, the induction magnetic ring drives the blades to rotate.
The principle of AC fan is driven by AC power supply. The voltage will be alternating between positive and negative poles. It does not need circuit control to generate magnetic field. The power frequency is fixed, and the magnetic pole change speed generated by the silicon steel sheet is determined by the power frequency. The higher the frequency, the faster the magnetic field switching speed.
Third, the bearing is different:
The varieties generally used on the radiator dispersion are: sleeve bearings using sliding friction, ball bearings using rolling friction, and a mixture of two bearing forms. In recent years, many radiator manufacturers have introduced many new technologies in bearings, such as magnetic bearings, water wave bearings, magnetic core bearings, Laifu bearings, etc., which are also improved on the basic form of bearings, and the operating principle is still unchanged. change. Oil-bearing and ball bearings are mainly used on ordinary air-cooled radiators. Double ball bearings are high-end products with high precision, high quality and high price. They are three high products. Oil bearing can meet a variety of working conditions, and his use cycle is also very long, the price is relatively low, but the quality is relatively general.
Shenzhen Jiangshanlai Electronic Technology Co., Ltd. was founded in Shenzhen, China in 2005. It is a large-scale enterprise specializing in the customization, research and development, manufacturing, sales and service of DC brushless motors, DC cooling fans, DC brushless fans, DC bracket fans, supercharged cooling fans, micro cooling fans, DC cooling fans, DC blowers, and non-standard fans, DC fan wholesale manufacturers and DC fan suppliers. Products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places.

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