1. Working principle:

DCCooling fanWorking principle: is throughDC voltageandelectromagnetic induction, The electric energy is converted into machinery to drive the fan blades to rotate. Relying on the coil and IC to switch continuously, the induction magnetic ring drives the fan blades to rotate.


AC fan working principle: rely onAC power supplyTo drive, the voltage will be positive and negative alternating, completely independent of circuit control, generating a 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, the faster the rotation speed will theoretically be. However, the frequency can not be too fast, too fast will cause difficulty in starting.

2. Structural composition:

DCCooling fanThe rotor includes DCCooling fanThe fan blade is the source of air flow and the fan axis, which is used to support the rotation of the balanced fan blade, the rotor magnetic ring, the permanent magnet, the key to push the magnetic stage to switch the speed, the outer frame of the magnetic ring, and the fixed magnetic ring. In addition, it also includes supporting springs, which are fixed by these components.TuberculosisRotate the entire component, motor part, produce the direction of rotation, and move the size of the rotation speed key. Its speed regulation performance is good, simple control.

The internal structure of the AC fan (single-phase) is composed of two coil windings, one is the starting winding, and the two windings are connected in series with each other, thus forming three points. The series point is the common end, and the end of the starting winding is the starting end. The end of the running winding is the running end. In addition, a starting capacitor is also required, usually with a capacity of 12uf, a withstand voltage of 250v, and two connectors, one end is connected to the end of the starting winding and the other end is connected to the end of the running winding to form a triangle type. One end of the power supply (no need to distinguish the zero line of the live wire) is connected to the end of the running winding (I .e. connected to one end of the capacitor), and the other end is connected to the common end, and the grounding wire is connected to the motor housing.

3. Material characteristics:

Material of DC cooling fan: alloy material is used, and the service life can be used continuously for more than 50000 hours. DC internal structure includes transformer and main control board (including frequency conversion circuit, rectifier filter,amplifying circuitEtc.) will not be affected by voltage fluctuations, so its service life is longer.

The internal structure of the AC fan is mainly based on the transformer. Most of the AC fans use domestic discharge needles, generally tungsten needles or stainless steel materials. If the voltage is shaken too large, it will affect the service life of the transformer.