What is the difference between our common DC fans and AC fans?
Release time:
2024-10-12
We often hear about DC cooling fans and AC cooling fans, just like DC radiators and AC radiators. Let's let Xiao Bian answer them one by one.
We often hear about DC cooling fans and AC cooling fans, just like DC radiators and AC radiators. Let's let Xiao Bian answer them one by one.
1. Working principle:
The working principle of the DC cooling fan: through DC voltage and electromagnetic induction, electrical energy is converted into machinery to drive the blades to rotate. Relying on the coil and IC to switch continuously, the induction magnetic ring drives the blades to rotate.
The working principle of AC fan: driven by AC power supply, the voltage will be positive and negative alternating, and it does not rely on circuit control to generate 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:
The rotor of the DC cooling fan includes DC cooling fan blades, which are the source of air flow and the fan axis, which are used to support the rotation of the balanced fan blades, the rotor magnetic ring, the permanent magnet, and the key to promote the magnetic stage switching speed, the outer frame of the magnetic ring, Fixed magnetic ring. In addition, it also includes a supporting spring, through which the entire part of the nodule is fixed to rotate, the motor part, the production direction of rotation, and the ability to 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.
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Telephone:86-754-85824577
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Address: YASE Building, 111 Laimei Road, Chenghai District, Shantou City, Guangdong Province
Telephone:86-754-85824577
Email：sales@yasecn.com
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