Inductance is a kind of reactance device. It winds wires on iron core or magnetic core, or air-core coil. The main physical characteristic of inductor is to convert electrical energy into magnetic energy and store it, so we can also say that it is a kind of A component that stores magnetic energy.

1. There are many types of inductors with different shapes. The more common ones are: single-layer flat-wound air-core inductor coils, inter-winding air-core inductor coils, stripped air-core inductor coils, multilayer air-core inductor coils, honeycomb inductors Coils, magnetic core inductance coils, magnetic tank inductance coils, high-frequency current resistance, low-frequency current resistance, fixed inductance, etc.

2. Inductors can be used to distinguish high-frequency and low-frequency signals. Because the high-frequency current inductance and audio current inductance of the high-frequency current resistance L of the high-frequency coil are very small, the high-frequency signal output by the collector level of the transistor VT can only pass C enters the detector circuit. After passing through the detector, the audio signal can be amplified by VT, and then reach the earphone through L.

3. Fixed inductors are a series of products with a wide range of uses. The coil (usually containing a magnetic core) is sealed in the shell. It has the characteristics of small size, light weight, firm structure, stable inductance, and convenient use and installation.

4. The resistance of the inductor to alternating current is called the inductance, which is represented by the symbol "XL" and the unit is Ω. The inductance is equal to the ratio of the alternating voltage (rms) across the inductor to the alternating current (rms) through the inductor. The inductance XL is proportional to the frequency f of the alternating current and the inductance L of the inductor respectively, that is, XL=2л fL (Ω).

5. The other is the color code method, that is, a color ring is used to indicate the inductance, and the unit is μH. The 1.2 ring represents two significant digits, the third ring represents multiples, and the fourth ring of patch-type shielded power inductor manufacturers represents permission. deviation. The rated current refers to the maximum current allowed to pass through the inductor during normal operation. In use, the actual working current of the inductor should be less than the rated current, otherwise the inductor coil will be severely heated or even burned.

At the same time, we can also install two contact electrodes on the detection head of the inductor detection device. Through the function of the detection head, the two contact electrodes directly contact the two terminals of the inductor element. The detection head can directly detect the inductor element. Qualified inductor products are sucked away by the magnetic suction head. This device can realize the mechanical automatic detection of the inductor components, and can effectively improve the detection efficiency of the inductor components. The utility model is used in the field of manufacturing technology.