Howto repair switch mode power supplies #4: Inductor in electronic circuits P2

This is the follow-up video on the Switch Mode Power Supply repair series, where we continue on the t
opic of inductors in a circuit. Here we look at electromagnetic induction, magnetic saturation of the
inductor core, and we describe the full energy transformation cycle for an inductor, which is a simi
lar picture compared to a simple mechanical spring. For comparison, in the mechanical spring we conve
rt mechanical energy into elastic/deformation energy, and back into mechanical energy. In the inducto
r electric energy is being first converted into magnetic energy, next the magnetic energy will collap
se, and due to the change of the magnetic field around the inductor, this will induce an electric cur
rent. This phenomena is called electromagnetic induction.
By introducing the concept of magnetic saturation, where the electric current starts to grow very fas
t, we also mention the need for Pulse Width Modulation (PWM), where the switching FET transistor has
to turn on/off very fast, so that the inductor never reaches magnetic saturation.

Видео Howto repair switch mode power supplies #4: Inductor in electronic circuits P2 канала Donkey Learning IT