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Description of the factors affecting the quality of the air-core coil

The air-core coil is a coil made of enameled wire. It has a simple structure, high precision, small distributed capacitance, high self-harmonic frequency, small temperature coefficient, good stability and strong anti-interference ability. It is a kind of high frequency. The inductor underneath.
Air-core coils can usually be used as current transformers, with frequency bandwidth, small size, light weight, convenient for digital measurement, and protection of microcomputers. Widely used in common mode filters, multi-frequency transformers, impedance transformers, balanced and unbalanced conversion transformers, suppression of electronic equipment EMI noise, USB lines for personal computers and peripherals, liquid crystal display panels, low voltage differential signals, car remote control keys, etc. .
Air-core coils are widely used in everyday electronic products. Their role in electronic circuits is also very significant, so its quality problems directly or indirectly affect the life or safe use of electronic equipment, so it is necessary to control the factors affecting the quality of air-core coils. What are the factors that affect the air-core coils? We can analyze the calculation formula of the air-core coil inductance:
Load its inductance as follows: coil formula

Hollow inductance calculation formula: L(mH)=(0.08D.D.N.N)/(3D+9W+10H)

D------coil diameter

N------ coil turns

D-----wire diameter

H----coil height

W----coil width

Units are mm and mH

From the above calculation formula of the air-core coil inductance, it can be seen that the rational factors affecting the quality of the air-core coil are the coil diameter, the number of turns of the coil, the wire diameter, the coil height, and the coil width. Then, when the shape and shape of the design of the air-core coil are determined, the quality of the air-core coil and the diameter of the coil and the inner diameter of the air-core coil are directly affected. These factors directly affect whether the electrical parameters of the air-core coil meet the requirements of the inductor application.
In addition to these, from the original state, there are also the selection of wire raw materials and the precision of mechanical equipment. According to the application conditions and design schemes, the selection of raw materials is determined, and the quality requirements for raw materials have been gradually developed from the previous 10 pinholes to 0 pinholes. This is because the industry and customers are increasingly demanding the quality of electronic products. the reason. The precision of mechanical equipment directly affects the precision of the finished product, including: whether it is deformed, winding chaos, scratches, poor shape, convex lines, uneven end faces, etc., not only increase the defective rate of the product, but also the qualified product. It is also potentially dangerous, and it often directly affects the service life of the air-core coil and the safety of the electronic product. Therefore, it is necessary to use high-precision manufacturing equipment to complete the quality of the air-core coil.
Dongguan Fuying Electronics Co., Ltd. has been rolling in the inductor coil industry for 25 years, making great efforts to continuously upgrade and renovate the production line to expand production capacity. The winding machine for air-core coils is the same as Japan's imported Japanese special winding machine, which is our product. The quality is escorted to provide customers with reliable protection.

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