An inductor is an important part of a circuit. It is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it.
There are four types of inductors usually in the Power Supply Circuit: toroidal inductor, vertical common-mode inductor, I-shape inductor, rod inductor…
Characteristic and parameter
- An inductor is characterized by its inductance, which is the ratio of the voltage to the rate of change of current. In the International System of Units, the unit of inductance is the henry (H) named for 19th-century American scientist Joseph Henry.
- Inductor usually consists of a coil of conducting material, typically insulated copper wire, wrapped around a core, the material of the core usually has Mn-Zn Ferrite, Fe-Si-Al, Magnetic-powder core, different material have different magnetic conductivity.
- The function of an inductor in the circuit is filter and energy storage.