Direct Current Control

Direct Current Control - Inductors

Рет қаралды 23,336

Күн бұрын

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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Пікірлер: 65

@chrissmith7655 12 сағат бұрын

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 Жыл бұрын

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

@electrarc240 Жыл бұрын

Thanks, more to come!

@hogeojin 11 ай бұрын

Really nice explanation with real components and scope screen.　Thank you!

@bennetting1609 Жыл бұрын

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

@yt4krist0f Жыл бұрын

Perfect explanation, enjoyed to watch, keep on going!

@K.D.Fischer_HEPHY 2 күн бұрын

Very nice and practical explanation.

@jj74qformerlyjailbreak3 11 ай бұрын

My arsenal full of great content said your channel will fit in just nice and never sooner. New Sub earned. Well done. Well done.

@leehewitt9559 5 күн бұрын

Great description and explanation. 👌

@mike-yp1uk 10 ай бұрын

Totally awesome video and I've never heard it explained like this.

@senorjp21 13 сағат бұрын

Excellent explanation and demo

@peterlethbridge7859 Жыл бұрын

a really good video, well explained, smart young man.

@makimcleary393 Жыл бұрын

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

@electrarc240 Жыл бұрын

Thanks, glad you enjoyed it!

@jimbo5728 3 күн бұрын

Great explanation!! ⭐️⭐️⭐️⭐️⭐️

@d614gakadoug9 10 ай бұрын

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.

@irfansami3335 6 ай бұрын

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 күн бұрын

A very important video Sir

@mertali7605 4 ай бұрын

Good explanation, thanks.

@electrarc240 3 ай бұрын

Glad it was helpful!

@MickHealey Жыл бұрын

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

@electrarc240 Жыл бұрын

Thank you very much!

@EnezReyiz Жыл бұрын

Very informative, thanks a lot

@electrarc240 Жыл бұрын

Thank!

@HTSpecOps 3 ай бұрын

Awesome video, subscribed !

@electrarc240 3 ай бұрын

Thanks for the sub!

@jasonjaffray4025 7 күн бұрын

MASTER TEACHER THANK YOU!

@electrarc240 7 күн бұрын

Thanks!

@DifficultyEasy 4 күн бұрын

AMAZINGLY well done!! NEVER seen anyone explain concepts and relations this clearly and using the actual components to demo! If you wouldn't mind, would you ping me to check an explanation on MOSFETs in a circuit I'm preparing? Much appreciated and keep this up! Much needed!

@kabandajamir9844 Жыл бұрын

So nice thanks

@haczyk84 Күн бұрын

Good video.

@bob_mosavo 4 күн бұрын

Thanks 👍

@RichardFreeberg Жыл бұрын

A wee bit of calculus without mentioning it. Nice. LOL. Seriously, I like the presentation. You would have lost a lot of the audience if you'd gone the full dt/dx and first second derivatives, eh? The fascinating thing is how dynamic inductance / capacitance phenomena are, and how our 'maths' can tame them! Thumbs up!

$@kevinfrack8217$

@kevinfrack8217 Жыл бұрын

I'm stuck on a problem I need a solution to! Think this video may be close to the solution. I need a Vampire power supply, that can give a regulated 5v dc @1amp, No matter what the AC input voltage is. An operational example: Have an electronic dimmer on a lighting circuit say 100w bulb we need to generate the 5v dc no matter what that Dimmer or Variac is set to (20 to 100 percent) Any help is be appreciated. Love your videos they are very Good, You right get to the point, and you are good at making them understandable for us average folk.

@electrarc240 Жыл бұрын

A simple linear regulator like a generic 7805 is the simplest way to get 5VDC@1A, I would use one of those as the final stage of a PSU, but they can only take up to around 35VDC on the input so preceding that you'd want something else. simplest would be a transformer with a rectifier such that the output would always be between 35VDC and maybe 7VDC. this wouldn't be very efficient or compact though. Really you want a switch-mode PSU which you could maybe achieve by rectifying the mains directly then feeding it through a circuit similar to this, but with voltage feedback rather than current. This wouldn't be isolated though so definitely shouldn't be used for anything a human could come into contact with. I'd look into buck converters, or forward converters if you need the isolation.

@lorddonpromillo4836 Жыл бұрын

Love the videos. Keep ingoing. Pretty sure the youtube algorithm will push you soon :-)

@electrarc240 Жыл бұрын

Thanks!

@ghanrajsingh7347 Жыл бұрын

Like your videos sir

@electrarc240 Жыл бұрын

Glad to hear that!

@mahmoudbitar6571 4 күн бұрын

Please make a video about Oscilloscope, i am a hobbyist and i love to see a video made by your way of explanation

@electrarc240 4 күн бұрын

Hmm that's a good idea, I usually avoid using them because they can confuse people, so clearly they need a video making about them!

@n30cortex49 7 күн бұрын

Very nice I've basically just startet making this my new edgy hobby. I've learned a thing and english ist not my native language. So really good job. xD I'll stay around some time. ☕

@Enigma758 Жыл бұрын

Wouldn't a capacitor at the output reduce the ripple?

@electrarc240 Жыл бұрын

Adding a capacitor can lead to a less uniform current waveform which makes this kind of very basic control less stable. If you make this circuit properly with a microcontroller adding a capacitor would make more sense. I will try and make a video covering that in the next few weeks if I find time.

@xvillin 5 сағат бұрын

What if we don't believe the equation or your oscilloscope? Could you please lick the inductor, turn it on and tell us how it feels?

@shawncalderon4950 3 ай бұрын

Superb presentation skills! I have watched a lot of KZfaq on the topic, and few are as good as this channel. I wonder if the glamor face close-ups are a bit off-putting to the browsing electronics hobbyist. Keep the camera on the topic and let your butter voice unravel the near-insurmountable mysteries of electricity.

@electrarc240 3 ай бұрын

Thank you very much! And yes I’ve been working more on hiding my money maker!

@shawncalderon4950 3 ай бұрын

@@electrarc240 Please forgive my rudeness. You are a gifted, talented, genius teacher; let no one tell you otherwise!

@electrarc240 3 ай бұрын

@shawncalderon4950 ah don’t worry you weren’t rude I’ve had much worse haha! Thank you again, I’m hoping to make more videos in a few months when I’m done with uni.

@shawncalderon4950 3 ай бұрын

@@electrarc240 Is uni short for university? I'm a retired military veteran from Chicago and am unfamiliar with that abbreviation.

@electrarc240 3 ай бұрын

Yes it’s for university. I will be working next year so should have more time for this. I’ve been very busy this year

@diyfamily6848 2 күн бұрын

Yes but you controll current with voltage, but you monitor the current.

@johnconrad5487 Жыл бұрын

college student? equations are good except that E = - Ldi/dt. you connected the scope clip to the positive power and the scope readings are upside down. seems like a little bit of a mess. when you first saw the flyback pulse going down that should have been your clue to correct the scope probe connections.

@electrarc240 Жыл бұрын

The clip is on the source terminal of the MOSFET to allow simultaneous measurement of Vgs, Vds, and Ids (inverted). Connecting different ground clips to different potentials would have resulted in a little bit of a mess.