1. Inductors are customarily referred to as inductors and are one of the basic electronic components commonly used.
There are many types of inductors with different shapes. The more common ones are: single-layer flat-wound air-core inductance coil, inter-wound air-core inductance coil, empty-core coil, multi-layer air-core inductance coil, honeycomb inductance coil, magnetic core inductance coil, magnetic tank inductance coil, high-frequency choke coil, low-frequency choke coil, fixed inductor, etc.
2. Fixed inductor is a series of products with strong versatility. The coil (often containing a magnetic core) is sealed in the shell. It has the characteristics of small size, light weight, firm structure, stable inductance and convenient installation.
3. The other is the color marking method, that is, the inductance is expressed by the color ring, and its unit is μH.
The 1.2 ring represents two significant digits, the third ring represents a multiplier, and the fourth ring of the patch shielding power inductor manufacturer represents the allowable deviation. The rated current is the max current that the inductor is allowed to pass during normal operation. In use, the actual working current of the inductor is less than the rated current, otherwise the inductor coil will be severely heated or even burned.
4. The resistance of an inductor to alternating current is called inductive reactance, which is expressed by the symbol "XL" and the unit is Ω.
The inductive reactance is equal to the ratio of the AC voltage across the inductor (effective value) to the AC current through the inductor (effective value). The inductive reactance XL is proportional to the frequency f of the alternating current and the inductance L of the inductor, I .e., XL = 2 л fL(Ω).
5. Inductors can be used to distinguish between high and low frequency signals.
Since the high-frequency choke coil L has a large inductive reactance to high-frequency current and a small inductive reactance to audio current, the high-frequency signal output by the common mode inductor manufacturer's transistor VT collector stage can only enter the detection circuit through C. After the detected audio signal is amplified by VT, it can reach the earphone through L.