What is the difference between AC fan and DC fan

The cooling fan can be divided into AC cooling fan and DC cooling fan. It is mainly used for ventilation and heat dissipation of computer equipment, household equipment, vehicle mounted equipment, mechanical equipment and other fields. Among them, AC cooling fans are mainly used for industrial machinery and other large-scale equipment; DC cooling fan is usually used for small appliances such as computer electronic equipment and household equipment. In addition, let's look at the main differences between AC cooling fans and DC cooling fans.

1. Working principle of AC/DC cooling fan

(1) The working principle of the constant cooling fan is based on the ampere theorem. A conductor generates a magnetic field around it through an electric current. If the conductor is placed in another constant magnetic field, it will generate attraction or repulsion, which will make the object generate kinetic energy. In the DC cooling fan blade, the magnetic rubber magnet is fixed around the silicon steel sheet. Two groups of coils are wound around the shaft, and Hall inductance element is used as synchronous detection equipment to control a group of circuits, thus allowing two groups of coils to work around the shaft. Silicon steel sheet produces various magnetic poles, which generate adsorption force through rubber magnet. When the suction and repulsion forces are greater than the static friction force of the cooling fan, the fan blades will start to work.

(2) The working principle of the AC cooling fan is to work through the AC direct power supply. At a constant AC power frequency, the steel plate generates a magnetic field switch, which makes the cooling fan blades generate kinetic energy and rotate. The higher the power frequency is, the faster the switching speed of the magnetic field is, and the higher the speed of the AC cooling fan is.

2. Parameter structure of AC/DC cooling fan

The energy consumption of the DC cooling fan is far lower than that of the AC cooling fan, and the DC fan can achieve a higher speed than the AC fan. Secondly, the DC cooling fan has magnets in its blades, while the AC cooling fan does not; The DC cooling fan has a PCB, while the AC cooling fan has no PCB; The appearance of AC and DC will also be slightly different. Generally speaking, AC silicon plate is thicker than DC silicon plate.

3. Price of AC and DC cooling fans

Compared with similar and brand cooling fans, DC fans are usually more expensive than AC fans. After all, you can choose your own cooling fan for every penny!

DC fan, EC fan, CPU heat sink