The skeleton of the I-inductor is supported by the winding of the copper coil. I-inductance is one of the attributes of an electronic circuit or device.

Toroildal inductors have the following functions: 1. Play a filtering role in AC circuit; 2. Can also play a vibration effect; 3. Dc circuit can play the role of frequency conversion; 4. It can also play the role of coupling and coupling.

From the appearance, such as a square or round inductor with a magnetic core, slightly larger volume, can see the core and coil.

The chip inductor is only used in the output end of the low-voltage DC control power supply. Its application is seen in the π shape filter circuit of CLC with the filter capacitor, which can stabilize the output current (inhibit current mutation). Inductance components, consisting of a single coil, some with a magnetic core (large inductance), generally expressed in units of μH and mH, current values ranging from a few milliamps to several hundred milliamps.