How to Judge the Quality of Inductance Coils

Inductance coils have already been widely used in our daily lives and play a crucial role in electronic devices. However, as the market for inductance coils becomes more and more chaotic, it has become increasingly difficult to find high-quality inductance coils. So, how can we determine the quality of an inductance coil?

The stability of an inductance coil represents the degree to which the parameters of the inductance coil change with environmental conditions. Generally, the inductance temperature coefficient αL is used to evaluate the stability of an inductance coil, which indicates the stability of the inductance value relative to temperature.

The inductance temperature coefficient is mainly caused by the expansion of the wire of the inductance coil due to heat, which causes geometric deformation of the inductance coil. In order to improve the temperature stability of the inductance coil, the hot-winding method can be used to manufacture the inductance coil. The wire for winding the inductance coil is passed through an electric current to heat the wire before winding the inductance coil.

In this way, the inductance coil can contract and closely adhere to the skeleton after cooling, and it is no longer prone to deformation after being heated, thus correspondingly improving the stability. In addition to temperature, humidity will also cause changes in the parameters of the inductance coil. For example, when the humidity increases, the distributed capacitance and loss of the inductance coil will increase, reducing the stability of the inductance coil.

When using an inductance coil, if there is no specialized measuring instrument, a multimeter can be used for a simple quality judgment. First, use the resistance range of the multimeter to measure the DC resistance of the inductance coil, and then compare it with the originally determined resistance value or the nominal resistance value.

If the measured resistance value is infinite, it can be concluded that the inductance coil has a broken wire. If the measured resistance value is much smaller, it can be determined that the inductance coil has a short-circuit layer. In both of these cases, it can be determined that the inductance coil has quality problems and cannot be used anymore. If the detected resistance value is not much different from the originally determined or nominal resistance value, it can be considered that the quality of the inductance coil is basically good.

Advantages of Fuying Inductance Coils

1. For all the global brands you know, there are precision inductance coils developed and produced by DongGuan Golden Eagle, and these coils have already been exported to more than 20 countries.

2. We have two modern factories in Dongguan and Pingxiang, with over 400 imported devices and more than 800 employees. There is no other factory that can compare with us.

3. For precision inductance coils whose wire diameter is more than 10 times thinner than a human hair, except for us, it is difficult to find another factory in China to place an order.

4. For extremely urgent orders, we will put the materials into production on the same day, and you can take away a part of the goods on the same day.

5. In recent years, 10 listed companies have come to inspect our factory, and all 10 of them have passed the inspection. What else do you have to worry about?

Since its establishment 20 years ago, 85% of DongGuan Golden Eagle Coils' customers are repeat customers.

For 8 consecutive years, there have been no customer returns.

When purchasing DongGuan Golden Eagle inductance coils, not only will you not step into a pitfall, but with the same amount of money, you can also buy inductance coils with better quality and longer lifespan. Purchasing DongGuan Golden Eagle inductance coils is even more reliable than an insurance company!