Direct Current Control - Inductors

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Published 2023-03-05

An introduction to switching current regulation making use of inductors. We test out the theory of stored energy in inductors, and utilise one to smooth current from a switching MOSFET. We then look into the need for a flyback diode in such a circuit, and finally consider the basic options for control schemes.

What happens when:
0:00 Introduction
0:19 Why current control?
2:17 How inductors will help
4:23 Target current hysteresis (DCC)
6:44 Does the theory hold up?
9:12 The BIG problem with inductors
11:12 How a single diode can fix the circuit (flyback diode)
13:06 Controlling the MOSFET using PWM
17:32 But this circuit does nothing?
18:30 Conclusion
18:42 Outro

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All Comments (21)

@chrissmith7655 21 hours ago

Hi ,thanks , the beauty of your series is we can watch it over and over again until we understand haha. Keep them coming, many thanks.
@markkrumpelman3973 1 year ago

Best an most informative video on youtube for simple circuits, for all of us that only know basics. Please keep them coming. Thank You
@bennetting1609 1 year ago

More ElecrArc in my life is always a good thing, keep it up! Also that's a fancy outro you've got now.
@yt4krist0f 1 year ago

Perfect explanation, enjoyed to watch, keep on going!
@hogeojin 11 months ago

Really nice explanation with real components and scope screen.　Thank you!
@K.D.Fischer_HEPHY 2 days ago

Very nice and practical explanation.
@jj74qformerlyjailbreak3 11 months ago

My arsenal full of great content said your channel will fit in just nice and never sooner. New Sub earned. Well done. Well done.
@mike-yp1uk 10 months ago

Totally awesome video and I've never heard it explained like this.
@senorjp21 22 hours ago

Excellent explanation and demo
@peterlethbridge7859 1 year ago

a really good video, well explained, smart young man.
@makimcleary393 1 year ago

Great explanation as always. Thank you very much, I'm looking forward to the next ones!
@leehewitt9559 5 days ago

Great description and explanation. 👌
@jimbo5728 3 days ago

Great explanation!! ⭐️⭐️⭐️⭐️⭐️
@rrangana11 2 hours ago

Thanks...Nice explanation.
@irfansami3335 5 months ago

Best video I ever had. Answers to all of my question going in mind. What inductor is doing in the circuit,... :D
@mkenya_engineer 2 days ago

A very important video Sir
@mertali7605 4 months ago

Good explanation, thanks.
@MickHealey 1 year ago

I like these videos. Very clear and well explained. I also learn stuff :-) Well done and thank you.
@EnezReyiz 1 year ago

Very informative, thanks a lot
@d614gakadoug9 10 months ago

In the waveform where the voltage is going to 85 volts, that particular voltage has nothing to do with the inductor, as such. It is the result of causing the body diode of the MOSFET to avalanche. It stays at the avalance voltage until the energy stored in the inductor been discharged. Avalanching the diode can be destructive if there is sufficient available energy/power (they are generally rated separately, hence the slash). In some circumstances it is perfectly safe to allow it. Note that at all times the drain of the FET is positive with respect to its source.