1. Working principle:
DC cooling fanThe working principle of: DC voltage and electromagnetic induction convert electrical energy into machinery to drive the blades to rotate. Depending on the continuous switching of the coil and the IC, the inductive magnetic ring drives the blade to rotate.
The working principle of the AC fan: driven by an AC power supply, the voltage alternates between positive and negative. It does not rely on circuit control and generates a magnetic field. The frequency of the power supply is fixed. The magnetic pole speed generated by the silicon steel plate depends on the frequency of the power supply. The higher the frequency, the faster the magnetic field switches, and theoretically the speed will be faster. However, the frequency should not be too fast, too fast will cause difficulties in starting.
2. Structural composition:
The rotor of the DC cooling fan includes DC cooling fan blades, which are the source of the airflow. The fan shaft is used to support the balanced rotation of the fan blades., rotor magnetic ring, permanent magnet and, magnetic ring frame. Fixed magnetic ring. In addition, it includes a support spring. These components are used to fix the nodules and rotate the entire part. It has good speed regulation performance and simple control.
The internal structure (single phase) of the AC fan consists of two coil windings, one is the starting winding, and the two windings are connected in series with each other to form three points. The series point is the common end and the end of the starting winding is the starting end. The winding end is the running end. In addition, a starting capacitor is required. The capacity is usually between 12uf and the withstand voltage is usually 250v. There are two connectors. One end is connected to one end of the start winding, and the other end is connected to one end of the run winding. The power supply (without distinguishing the neutral wire of the live wire) is connected to one end of the running winding (that is, also connected to the end of the capacitor), the other end is connected to the common end, and the ground wire is connected to the motor housing.
3. Material features:
DC cooling fanMaterial: Made of alloy material, its service life can be used continuously for more than 50,000 hours. The DC internal structure has a transformer and a main control board (including frequency conversion circuit, rectifier filter, amplifier circuit, etc.), which is not affected by voltage fluctuations, so its service life is long.
The internal structure of the AC fan is mainly a transformer. Most of the materials selected for AC fans are made of household discharge needles, usually tungsten needles or stainless steel. If the voltage fluctuation is too large, it will affect the service life of the transformer. The above is the difference between DC fan and AC fan, I hope it will be helpful to everyone. Shenzhen Jiangshanlai Electronic Technology Co., Ltd. is a professional brushless DC motor, DC cooling fan, DC brushless fan, DC bracket fan, booster cooling fan, micro cooling fan, DC cooling fan, DC blower, and non-standard customized fan, R & D, manufacturing, sales and service in a large enterprise, wholesale DC fan manufacturer and DC fan supplier. Products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places.
