What are the most important functions of an inductor?

Inductor plays the role of filtering, oscillation, delay and notch in the circuit, masking signal, filtering noise, stabilizing current, suppressing electromagnetic interference and so on. The working principle of the inductor is divided into two parts: the working process after the inductor is energized, at this time, the inductor generates magnetic field by electricity; The working process of a inductor in an alternating magnetic field, where the inductor generates alternating current from the magnetic field. When an alternating current is passed through the coil, an alternating magnetic field, known as the primary magnetic field, is generated around the inductor. When direct current is applied to an inductor, a magnetic field of constant magnitude and direction should be generated around the inductor. Through DC: the so-called through DC means that in a DC circuit, the role of the inductor is equivalent to a wire, it does not play any role.

Resistive AC: In an AC circuit, the inductor will have an impedance, which is XL, and the current of the whole circuit will be smaller. Resistive effect of the inductor: The self-induced electromotive force in the inductor coil always changes with the current in the coil.

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