How Inductors Work
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- เผยแพร่เมื่อ 21 ก.ย. 2024
- If you're curious about inductors and how they work, then this is the video for you! In this video, we'll explore the basics of inductors and their role in electrical engineering.
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What negative to positive flow , thank you for your video
How did you get to add such emoji on your comment?
Channel members can use the emoji
Would have been helpful to hear *why* we'd have an inductor at all. Also, doesn't some current (or water) still flow in one path even if there's an easier path?
Agreed. I'll make some example circuits you can follow along
@@EngineeringMindset thanks!
Exactly my thoughts! 👍👍
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Current always flows if there is a loop path for it to, how much is determined by the path resistance where all paths sum to supply voltage over total circuit resistance (It = Vs / Rt). In the case of the inductor, however, there is a time component; electrical energy is first stored in the form of a magnetic field, which produces an initial opposition to the flow of current (Back EMF), once the magnetic field is fully formed (measured in micro-seconds, you wouldn't 'see' this), it acts like a very low value resister, essentially a short circuit. Note: this is not a practical circuit, it's only use to simply illustrate the behaviour of an inductor.
As an EE, I think this video would have benefitted from an explanation of what inductors are, and why they operate the way they do, before you get into the how. Touching on Len'z law would have helped a lot
I think he did a great job of explaining how they work for his target audience: the least common denominator, ie, me.
As a video creator, you have to decide who your target audience is and how to best teach them, as well as how much they can swallow in a given time period. IMO, he nailed it.
@@floorpizza8074 the most common comment on this video is asking why. And an extra minute to offer some explanation isn't going to split the audience. Don't whiteknight.
As Feynman put it, "Why" questions are tricky. Of course you can say Lenz's law is the reason why inductors work the way they do, but then out of a sudden thousands of new questions emerge: WHY does Lenz's law hold? WHY does the right-hand rule hold and not a mirrored version of it? WHY are magnetic and electric field correlated at all? Etc etc etc... IMO it's perfectly legitimate to stick with the HOW in the beginning to avoid complexity explosion LOL
@floorpizza8074 But without explaining its purpose, what it does, Why it is there? To novice it has no meaning. It's in one ear and out the other...ultimately learning nothing. I am a novice and I still have got no idea.
So it creates a magnetic field and then it collapses. Well that's great to know... yay.
Inductors are primarily used in AC (and switched DC) circuits but explaining how they work at a basic level is very difficult in AC circuits (because you end up having to explain reactance, impedance, phase shifts etc.). The battery + inductor + light is not a practical circuit, but it does eloquently explain how they work (current 'inertia' via magnetic field), which is the purpose of the video.
It’s interesting you used the word inertia, I’m just a beginner with electronics but have been welding 25 years and when I took a electronics 101 course my gut told me the inductor gave the current inertia so it’s nice to hear you kind of confirm that in so many words.
I have no word to explain how much I am impressed by your tutorials. Modern institutes should learn from you. How to teach their students. I am so excited. you guys absolutely incredible. 👏 ❤ love you guys.
Man, this is the best video I've seen explaining inductors. I still remember how hard it was for me to understand inductors when I was studying electronics back in the day. Kids have it so easy nowadays.
As a teacher, i have to say that you have done an awesome analogy since the beginning.
Congratulations.
An inductor is an AC resistor. All the way from low frequency (50/60 Hz) up to microwaves.
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Even with this great explanation I dont understand real use of them. I see lot of them on electronic boards: PC motherboards, videocards, power supply units and it always amazes me.
Im not sure if I understood either but it seems like some sort of voltage stabilizer than can be used to provide a bit of energy for a brief moment.
Cool video, us Ham radio operators use inductors frequently to match the radio to antenna impedance mismatch
To the battery DC, the inductor is just a length of wire. A inductor only has reactance to alternating current. The battery should be replaced with an AC source.
It seems like what you are describing is a capacitor. How would you describe that an inductor can act like a capacitor and how are they different? I normally think of an inductor as a device used to cause current on another, non-electrically connected nearby circuit while a capacitor stores energy like a battery within a circuit typically used to reduce variance in voltages over time or to provide some electrical bursts for some applications. Appreciate your videos and helping me better understand what you are trying to share here. Thanks.
I will try to explain the difference between an inductor and a capacitor to you in the simplest way that I know.
A serial connected inductor is like a flywheel. It takes some energy to get it started but when it is started it is easy to keep running. The only thing that really would stop it if left on its own is the resistance in the bearings. When it is spinning it has stored energy and to stop it it must give out this energy. The electromagnetic force in the inductor works in the same way. It keeps on resisting change.
A parallel inductor works as an open circuit. it will take some time to get the flywheel to spin so that there no longer is any resistance.
A parallel capacitor on the other hand is more like a big water tank. If you poor in water it takes some time before it is filled up. It also stores energy but it must be full before it has the same pressure as the input pipe. A pipe out the bottom of the tank will start up with low pressure but eventually have full pressure when the tank is full. The output will have almost full pressure all the time even though the input may be intermittent.
A serial connected capacitor will allow a current immediately. It is like an already filled up tank with a rubber membrane in the middle.
In many ways an inductor and a capacitor work similar. It is just that the inductor is resistant to current and the capacitor sucks in the current.
The inductor has the voltage before the current and the capacitor has the voltage after the current. They both store energy.
@@leonhardtkristensen4093Thank you... Your explanation helped
Im researching magnetism and electricity this video is informative thanks
This is actually a better explanation than I learned in electrical school.
must have been very very bad indeed then, i still don’t know why we need inductors🤷♀️🤷♀️🤷♀️🤦♀️🙄🤣♥️
This is hands down the most amazing and intuitive approach I've ever seen on inductor.kudos man! you guys are the reason I got my interest back at Electrical Engineering
May I ask where are inductors used?
It would've been nice to add at the end of the video where and why inductors are used to better fix the concepts in mind, but still a great video
Interesting video but I'm curious about why you removed so much of the original video named "Inductors Explained - The basics how inductors work working principle" that you posted 3 years ago and that this video is cut from 😖
No content😊😄
This is a shorter version, for people that don't like longer videos... I like it it! 👌
The algorithm caters to people with short attention spans
Views were dwindling on the old video, people keep messaging me asking to make a video on how inductors work so they either couldn't find it or TH-cam wasn't recommending it to them. TH-cam is also changing with shorts because now people want quick answers instead of long detailed ones so I trimmed it down and reposted it. It's been popular but I'm glad you have clearly watched the original, I prefer making the longer videos.
@@EngineeringMindset: Thank you for your reply, I also prefer the more Indepth videos but can understand the need to sometimes shorten them.
Keep up the good work :)
What is the difference then between a capacitor and an inductor. Examples of inductors? THANKS.
Please could you make videos showing how:
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"... electrons leave the battery, they flow and try and get back to the other side of the battery" - I get why you want to illustrate what happens using that analogy, but the student may also want to know that is not really what happens to the electrons. In reality they jostle, the electric field pushing them in a direction but the electrons that are free push against each other too. In the end the current is just an emergent property of energy transfer via electric fields.
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good example on how a shaded pole motor works
I wish I knew the water wheel analogy earlier. Interesting!
Is the purpose of an inductor kind of like the flywheel on an engine?
4:52
If the inductor will eventually act like a normal piece of wire with no resistance, what's stopping it from creating a short circuit?
There are only two things you have to understand. An electron and light. The movement of electrons higher to lower spins or otherwise produces light. Other things are encapsulation. Ten power +-24. 12×2. Because Max curvature is power 12. Time is always a quantum of 24. For four dimensions 12 - 4 equals 8.
Posting this to a couple of Amateur Radio facebook groups - a great explanation! Thank you
Cool. Thanks for sharing.
Your animations are incredibly good and your explanations are spot on!
Great video! Looking forward to why one would want the bulb (load) to turn off when the switch is turned on... Thanks!
I was thinking about it when ever I see
Very well explained using water turning a turbine and the kinetic spinning fins as the EMF 👍
I find the water analogy to visualize what's happening in electronics is a good fit but not perfect. It would be interesting to see how you can model a capacitor this way(?) I'd imagine a reservoir split in the middle by a rubber diaphragm
Since current has no inertia, it's difficult to find an analogy!
Or a water baloon. When the balloon is full, it will visually stop taking more water. And when discharged, all those water comes out fast due to the balloon's stretchiness.
Wait how is this different from a capacitor? That also helps current flow for a short duration if the power source is shortly disconnected...
Can you do a video visually explaining how vars are used in the building of the magnetic fields in inductors and how leading an lagging PFs work?
Is the purpose of the inductor to act as a kind of shock absorber?
Can say that it eliminates the impulse whick can damage the electronics component .
Almost it prevents sudden fluctuations of current
@@kumarsiddharth4287 but in his explanation it the turns off the lamp, which if that is the thing we are protecting, but still wants it to work this doesn't make sense. Or does the inductor only kick in once the current threshold of the lamp has been met?
@@ifell3 Yes, you are right, the explanation is confusing people. The inductor have to be in circuit with the lamp and after the power source, so that it protects the lamp against spikes or voltage drops.
How is this different from a capacitor
It probably would help to mention the practical part of the theory where the inductor tries to maintain the peak of the alternators (power supply} voltage even when it drops to 0 volts 60 times a second or whatever the frequency may be.
video quality so very good ❤️
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So then, what purpose does an Inductor serve? Is it similar to a Capacitor as it stores charge - or does it? It seems to work like a resistor when first given power, but then it causes a short circuit through itself. I'm confused?
It maintains current where capacitor maintains voltage. I'll do a comparison video with real examples
@@EngineeringMindset Thank you, that would be helpful
What would be the purpose of this? As a safety mechanism? If power gets cut you can maintain it for a period of time?
This is not a practical circuit, it's being used just to simply illustrate the behaviour of an inductor. Inductors are primarily used in AC (and switched DC) circuits (filters, chokes etc) but it's hard to describe their basic function when the supply is continuously changing. Yes, they can be used to 'fill in' for supply gaps but this is rare, or rather, large transformers tend to pick up this function.
Now I got it thank you. Perfect.
so at 3:08, we basically made a short circuit? Also, why would we use inductors? What are their purpose other than having a light turn on very briefly when opening and then closing a contact?
Why we need it? Real life examples? What exactly the do in a circuit ? Where are they used? Unfortunately, theory doesn't paint the full picture.
Agreed, will be making some example circuits
Basically the inductor reduces the in rush current to protect wiring and components
Is it possible to give Vedios on DTR faults and effects pls
Very very good.
But what do you use it for, exactly?
Maintain current. I'll make some example circuits to help demonstrate
Thank you🙏
Excellent.
thanks forget what they did. easy video to follow for even the newest of minds. If I'm not mistaken they are not even really used anymore in IMLC beyond the power supply.
thank you
Can an inductor have the same resistance as a resistor and what would this do?
Inductors can have resistance but it's not exactly a resistor. A resistor's job is to just reduce the current flow in the circuit. But an inductor is more of a wounded coil which offers resistance at first because of its tendency to charge initially.
Yes, in transient state but in steady state it acts as short circuit i.e. zero resistance
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Excellent videos!! Please PLEASE do a video on oscillating/resonating circuits.
Wow very nice
Replacing the reducer with a one way valve would be even more accurate. Freewheeling diode would replace the resistor
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I know that capacitor is like water tank and inductor as water wheel.
Still... the main question is why do you need it in the full circuit?
Let's say we make a simole light circuit, won't it be fine if we do not need inductor or capacitor?
He is using the light as a demonstration
Inductors are equivalent to flywheels in a car engine.
Unfortunately, this missed the point of the title; it described WHAT inductors do, but didn't address HOW they work at all. This would have been a great opportunity to explain the relationship between electric and magnetic fields, which are fundamental to HOW they work. I don't think a person can understand how an inductor works unless you escape the analogy and understand what is actually happening.
Doesn't the inductor push the electrons the other direction compared to when it is being "charged"?
Good one
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Well explained
Brilliant explanation. Thanks
what if we sort the inductor in series in this circuit?
Is a capacitor the same thing but with an electric field instead of a magnetic field?
What would happen to the light bulb if you wired the inductor in series with it?
@250CC thank you!! So an inductor in series could almost act like a simple "delay on" device.
very well explained
Very nice man very niceeee
bold move using non conventional electron flow to teach the basics
Thanks
Thank you, Artem
I see these on mini splits. Was curious what they do
Excellent! As usual. Keep it up!
Good to watch.
the creation of the magnetic field, the movement of that, I assume is then opposing the current thanks to the like, the left or right hand rule, or something, cus a moving magnetic field induces a current, and the movement of the field being created by the inductor will then cause it to induce a current in the opposite direction causing impedance, thats what ive imagined happens atleast.
So inductors are like electrical inertia?
I like the video I understand what is going on from someone that deals with electrical everyday. But this all means nothing if I don't see a practical application and see it in use. I would recommend. adding that. Most of my knowledge, even though limited was actually learned by seeing it in use and by measuring it. Example would be seeing an vehicle ignition coil fire a spark plug and seeing the electrical work through a voltmeter, oscilloscope or amp meter.
Thank you.🙌
so an inductor is used to save power by being able to cut power and apply it multiple times instead of having to supply constant power??
Can you do a video on guitar amps :)
It's kind of like an electric flywheel? It seems really similar to one
If you use negative to positive was the resistor on the wrong side?
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Thank you sir ❤️
I was expecting an explanation on what's the use case for an inductor...
I'll be covering example circuits in a follow up video
I really need a usecase to understand it. So why would i create circuit like this?
Can inductors be used to limit inrush current, and if so, why are resistors sometimes used?
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So why would you want to do this? What are practical applications? This video definitely explains the function better than any other I've seen though.
inductors are commonly found in dc/dc switch mode power supplies. inductors store energy in a magnetic field. if you're clever, you can build a circuit that uses a switch to turn current flow on/off through this inductor and get a higher or lower voltage on the output. inductors are also used in filtering (both signal and power filters)
well as a student of Electro engineering there are a few things from the top of my head where inductors are used which are: Breakers, Motors and Generators, Transformers, it is also used to generate electromagnetic waves for a transmitter (basically a radio), there are a lot more applications for sure but these are few that i thought of right now.
Simply put, you wouldn't; this is not a practical circuit, it is being used only to illustrate the behaviour of an inductor.
Can you explain this as it relates to an electric motor, as that is a big inductor. Thanks
Please see our electric motor videos
is it just me or do inducters have similar effects to capacitors in the circuts and LED besides the magnetic field
pump analogue is the controller ,not the battery ...
After saw India Pakistan high voltage match I saw this video after excitement. First I was not sure that India won and now I do not think that anyone best us . Like inductor , now we stablised 🤣😂😃
He
And since this happens within microseconds, what is the purpose of it??
Maintain current instantly if there's a dip in power but I'll make some example circuits
@@EngineeringMindset I appreciate you responding. Is it for mainly protection? Or for high speed switching, oscillators and electronics? I dont really see the use for it with a light bulb or linear loads
can you do a video about LED driver works?
Seen the new LED explained video? so much detail covered! th-cam.com/video/O8M2z2hIbag/w-d-xo.html
Is the inductor create an a Parasitic current
I love these tutorials but can you please resist the temptation to anthropomorphize? "The inductor doesn't like this… The inductor wants to…"
Awesomeness
Small turbine pump in the animation ? Looks like it
What's this used for?
basic understanding is imp
Why this inertia? Is it because electrons flows very very slow, what flows instantly is field both electric and magnetic field between particles in conductor and in core of inductor? Im asking cause lenght of wire to make coil, usefull on timings of micro seconds (power converter), lenght of wire is very short, and normally light would travel instantly, for some reason such wire is able to make huge difference in timing. Two wires close each other, with current flowing same direction makes coil, makes difference, could this because if current flows slower than speed of light? Could wire of conduction in witch current flows even slower than copper make even better coil? Clectrons are like domino effect it pushes against each other, what flows mostly is electric and magnetic field, electrons itself are much much slower than magnetic field, numbers of real electrons flowing is very very low, comparing to electromagnetic force caused by it. If such difference in speed we would have inertia effect.. I cant explain, i struggle to really understand why how, in details it works. This turbine explanation is very good though, best ever came across. Ever. What would happen if we make coil of wire in witch electrons flow faster what would be difference in material in wich electrons flow slower? Does parameters of coil varies depending on temperature?
I've always been fascinated by electricity.
Errrm what are they used for, these indusctors?
For DC it is used to slow the inrush of current to the device as the circuit charges up. In ac it is used as a low pass filter.