Inductors Explained - The basics how inductors work working principle
video description
Date: 2023-11-17
Related videos
Comments and reviews: 30
Colin
You have provided no details of how the inductor works and how the initial current is small and gradually increases. When current initially flows into an inductor, each turn produces EXPANDING magnetic flux and this flux cuts all the other turns in the coil to produce a voltage in each turn that is opposite to the incoming voltage. The net result may be 10v volts entering the coil and 9. 9v being generated by the coil as a back voltage. This means only 0. 1v will be seen by the coil and by Ohms law, the current will be very small. As the magnetic flux increases, the rate at which it increases becomes less and less and this flux, passing the other turns of the col, produces slightly less back-voltage and so the current increases. In the end, the magnetic becomes a maximum and may get to a point where the magnetic circuit is saturated and cannot absorb or conduct any greater flux. At this point the magnetism is a maximum and the current is a maximum. The circuit needs to detect this point (or before saturation occurs) and turn off the supply. The magnetic lines of force are no longer produced and they start to collapse. The collapsing (effect) causes voltage to be produced in each of the turns that has an opposite polarity to the supply voltage and depending on how fast they are able to collapse, the voltage generated by the inductor can be 10 times or even 1, 000 times higher than the original voltage. But most important: it is in the opposite polarity.
This voltage will only be very high when the load on the inductor is very small - such as no load at all. If the load has a very low resistance, the high voltage will be turned into a very small voltage and the current will be very high. How this occurs is another story.
reply
You have provided no details of how the inductor works and how the initial current is small and gradually increases. When current initially flows into an inductor, each turn produces EXPANDING magnetic flux and this flux cuts all the other turns in the coil to produce a voltage in each turn that is opposite to the incoming voltage. The net result may be 10v volts entering the coil and 9. 9v being generated by the coil as a back voltage. This means only 0. 1v will be seen by the coil and by Ohms law, the current will be very small. As the magnetic flux increases, the rate at which it increases becomes less and less and this flux, passing the other turns of the col, produces slightly less back-voltage and so the current increases. In the end, the magnetic becomes a maximum and may get to a point where the magnetic circuit is saturated and cannot absorb or conduct any greater flux. At this point the magnetism is a maximum and the current is a maximum. The circuit needs to detect this point (or before saturation occurs) and turn off the supply. The magnetic lines of force are no longer produced and they start to collapse. The collapsing (effect) causes voltage to be produced in each of the turns that has an opposite polarity to the supply voltage and depending on how fast they are able to collapse, the voltage generated by the inductor can be 10 times or even 1, 000 times higher than the original voltage. But most important: it is in the opposite polarity.
This voltage will only be very high when the load on the inductor is very small - such as no load at all. If the load has a very low resistance, the high voltage will be turned into a very small voltage and the current will be very high. How this occurs is another story.
reply
Colin
Although the animation is very impressive, it misses the most important and amazing feaure(s) of an inductor. At approx 3: 30 in the video, the globe should have been 2 LEDs, back to back, so that when the switch is closed, the red LED illuminates and when the switch is opened, the green LED illuminates. This shows the voltage to the combination REVERSES and although this is shown on the animation, it is not highlighted. The other feature you can demonstrate is the voltage from the inductor is higher than the battery voltage, when it is in collapsing mode. You can use a 3v battery and put 2 LEDs in series to capture the effect of the collapsing magnetic field. I also prefer to see the switch in the positive rail as this is the electronics way to cover a demonstration. All the viewers may sing their praises but the explanation is far too complex and they really haven't learnt or understood anything AT ALL. You have to cover an inductor in terms of expanding and collapsing flux and in this way the student can see how and why and when the output voltage changes direction.
Finally, no has covered the amazing effect of an inductor being able to convert a high voltage at low current into a low voltage at high current.
reply
Although the animation is very impressive, it misses the most important and amazing feaure(s) of an inductor. At approx 3: 30 in the video, the globe should have been 2 LEDs, back to back, so that when the switch is closed, the red LED illuminates and when the switch is opened, the green LED illuminates. This shows the voltage to the combination REVERSES and although this is shown on the animation, it is not highlighted. The other feature you can demonstrate is the voltage from the inductor is higher than the battery voltage, when it is in collapsing mode. You can use a 3v battery and put 2 LEDs in series to capture the effect of the collapsing magnetic field. I also prefer to see the switch in the positive rail as this is the electronics way to cover a demonstration. All the viewers may sing their praises but the explanation is far too complex and they really haven't learnt or understood anything AT ALL. You have to cover an inductor in terms of expanding and collapsing flux and in this way the student can see how and why and when the output voltage changes direction.
Finally, no has covered the amazing effect of an inductor being able to convert a high voltage at low current into a low voltage at high current.
reply
Anthony
Your explanation of inductors is plain and simple and I understand. You've not given any reason for their use or any place in a circuit when their critical to use. Like I said I understand how they work, I just have no idea why I would need to use any. Big or small. Could you please give examples when your explaining electronic components on where and why to use them. I don't have any electronic training or schooling. I've listened to a lot of your videos but I'm not any closer to understanding how to use any electronic component except maybe the bridge rectifier but I have no idea about the value of the diodes I would need to make 1 from 110AC
reply
Your explanation of inductors is plain and simple and I understand. You've not given any reason for their use or any place in a circuit when their critical to use. Like I said I understand how they work, I just have no idea why I would need to use any. Big or small. Could you please give examples when your explaining electronic components on where and why to use them. I don't have any electronic training or schooling. I've listened to a lot of your videos but I'm not any closer to understanding how to use any electronic component except maybe the bridge rectifier but I have no idea about the value of the diodes I would need to make 1 from 110AC
reply
Ryan
Once when I was working on the pipeline construction biz as a laborer they set this huge pipe 3 ft diameter 1000 lbs per foot, 1 mile long up on insulators (wooden skids) about 4 or 5 ft above the ground UNDERNEATH THE LARGEST HIGH POWER TRANSMISSION LINES IN THE COUNTRY. Underneath and in line. There was some snow and the pipe sat there for 2 days. I was the first one to touch it (ground it. It blew me back about 12 ft. I woke up with all these indian laborers looking down on me in a circle saying Is he dead? Is he dead. Nope. Not yet.
reply
Once when I was working on the pipeline construction biz as a laborer they set this huge pipe 3 ft diameter 1000 lbs per foot, 1 mile long up on insulators (wooden skids) about 4 or 5 ft above the ground UNDERNEATH THE LARGEST HIGH POWER TRANSMISSION LINES IN THE COUNTRY. Underneath and in line. There was some snow and the pipe sat there for 2 days. I was the first one to touch it (ground it. It blew me back about 12 ft. I woke up with all these indian laborers looking down on me in a circle saying Is he dead? Is he dead. Nope. Not yet.
reply
Joachim
if we record voltage/current through a RL circuit nothing changes, but if we record the current through the resistance only we see this graph at 8: 10 for the inductor? We made some experiences in the lab for school and we were told to measure voltage through the resistor (connected to gnd) and not inductor (inductor + resistor showed nothing special I think. Really trying to wrap my head around what we saw and did, and what to say in the report.
reply
if we record voltage/current through a RL circuit nothing changes, but if we record the current through the resistance only we see this graph at 8: 10 for the inductor? We made some experiences in the lab for school and we were told to measure voltage through the resistor (connected to gnd) and not inductor (inductor + resistor showed nothing special I think. Really trying to wrap my head around what we saw and did, and what to say in the report.
reply
Shehab
Electrons do not leave the battery and travel the circuit as you say if they do that it will be a very slow process because electrons have a slow drift velocity.
It may be simple for people to understand but instead you can say the turth that the potential difference between to points created by the battery makes an electric field that propagates at a speed close to speed of light and it is which then exerts force on the electrons to move.
reply
Electrons do not leave the battery and travel the circuit as you say if they do that it will be a very slow process because electrons have a slow drift velocity.
It may be simple for people to understand but instead you can say the turth that the potential difference between to points created by the battery makes an electric field that propagates at a speed close to speed of light and it is which then exerts force on the electrons to move.
reply
LuciStar
Idk, I have a hard time understanding things when they're explained like inanimate objects have feelings and preference. The idea that an inductor does a thing because it doesn't like something and tries to resist that thing doesn't really feel like an explanation to me. Sometimes I feel like you should just not get too far into technical aspects if you're not going to explain them technically.
reply
Idk, I have a hard time understanding things when they're explained like inanimate objects have feelings and preference. The idea that an inductor does a thing because it doesn't like something and tries to resist that thing doesn't really feel like an explanation to me. Sometimes I feel like you should just not get too far into technical aspects if you're not going to explain them technically.
reply
Hypersphere
Thank you a lot dude, till the day before yesterday I didnt knew that Im interested in electronics. Im honestly even think about picking this up as my future job!
I love how you explain this youre better at explaining than any teacher that I ever had ( had at least 2 or 3 pretty god ones, not the norm xD )
reply
Thank you a lot dude, till the day before yesterday I didnt knew that Im interested in electronics. Im honestly even think about picking this up as my future job!
I love how you explain this youre better at explaining than any teacher that I ever had ( had at least 2 or 3 pretty god ones, not the norm xD )
reply
Adam
6: 20 statement is not entirely correct. This is D. C. from a battery!
That Inductor is effectively Not in the Circuit Until the switch is opened, the battery power turned off and the magnetic field collapses ( from the D. C. battery. Inductive reactance will explain this but was strangely left out of the video.
reply
6: 20 statement is not entirely correct. This is D. C. from a battery!
That Inductor is effectively Not in the Circuit Until the switch is opened, the battery power turned off and the magnetic field collapses ( from the D. C. battery. Inductive reactance will explain this but was strangely left out of the video.
reply
Random
4: 12 What would happen if I put a diode facing against the direction of the electron flow when the switch is open? Do I get something like capacitance? Do I get static electricity? Does all the electrical pressure go to the bulb and break it? Is it rapidly released into the surrounding air? What happens?
reply
4: 12 What would happen if I put a diode facing against the direction of the electron flow when the switch is open? Do I get something like capacitance? Do I get static electricity? Does all the electrical pressure go to the bulb and break it? Is it rapidly released into the surrounding air? What happens?
reply
WAMAW
tarlink has generated significant interest and excitement in the tech and internet connectivity communities. Its promise of providing high-speed internet access to remote and underserved areas is seen as a potential game-changer, especially for regions with limited access to traditional broadband options.
reply
tarlink has generated significant interest and excitement in the tech and internet connectivity communities. Its promise of providing high-speed internet access to remote and underserved areas is seen as a potential game-changer, especially for regions with limited access to traditional broadband options.
reply
Ben
What do you know when I was six years old I was playing with inductors, every kid that ever put wire around nail is stuck it to a 9-volt battery, a kid that ever done that you know they were going to be your future engineers and scientists I like to know what happened in my case
reply
What do you know when I was six years old I was playing with inductors, every kid that ever put wire around nail is stuck it to a 9-volt battery, a kid that ever done that you know they were going to be your future engineers and scientists I like to know what happened in my case
reply
Jayden
what happen when an inductor (or any coil of wire) polarity is isolated? the emf will instantly collapse but what will it induce? or are they using the collapsing emf as resistance as so not to induce an electrical short?
reply
what happen when an inductor (or any coil of wire) polarity is isolated? the emf will instantly collapse but what will it induce? or are they using the collapsing emf as resistance as so not to induce an electrical short?
reply
NEET
sir, i just have one basic doubt about the term 'magnetic energy'
as we know magnetic field forms closed loop so this 'magnetic energy' is definitely not potential energy, so what exactly is this 'magnetic energy'?
reply
sir, i just have one basic doubt about the term 'magnetic energy'
as we know magnetic field forms closed loop so this 'magnetic energy' is definitely not potential energy, so what exactly is this 'magnetic energy'?
reply
Roger
Isn't the current flowing out from the coil going to be in the opposite direction when the switch oppens? As the emf want to stabilize. (Like a spring being pushed down and returns back to it's original state)
reply
Isn't the current flowing out from the coil going to be in the opposite direction when the switch oppens? As the emf want to stabilize. (Like a spring being pushed down and returns back to it's original state)
reply
Sankaravelayudhan
Inductor is resistance to increase in voltage opposite to that of capacitor which gives resistance to increase in current as the increase in voltage gives rise to torque as a starter.
reply
Inductor is resistance to increase in voltage opposite to that of capacitor which gives resistance to increase in current as the increase in voltage gives rise to torque as a starter.
reply
Brian
Thanks for the refresher on inductors and also that showing the electron flow method. Electricity flows from Negative to Positive. I can't stand it when people say positive to negative.
reply
Thanks for the refresher on inductors and also that showing the electron flow method. Electricity flows from Negative to Positive. I can't stand it when people say positive to negative.
reply
Erik
One thing I don't get is why the resistive load (lamp) turns off when the inductor picks up speed and becomes less resistant. The voltage potential across the lamp is still the same, no?
reply
One thing I don't get is why the resistive load (lamp) turns off when the inductor picks up speed and becomes less resistant. The voltage potential across the lamp is still the same, no?
reply
Randy
Sorry so to measure the inductance of a component we need to take current measurements for that point in the circuit with and without the component? I'm not sure if im confused or not
reply
Sorry so to measure the inductance of a component we need to take current measurements for that point in the circuit with and without the component? I'm not sure if im confused or not
reply
Luke
Question - if a inductor when it's fully power has very little resistance and all the electrons flow into the inductor and not the lightbulb, how does that not cause a short circuit?
reply
Question - if a inductor when it's fully power has very little resistance and all the electrons flow into the inductor and not the lightbulb, how does that not cause a short circuit?
reply
Frank
My only question is why would you want to e. g have the lightbulb turn off if the switch is on? Is this to save the circuit in the event too much amperage passes through?
reply
My only question is why would you want to e. g have the lightbulb turn off if the switch is on? Is this to save the circuit in the event too much amperage passes through?
reply
Fabian
Thank you for the video. I have a question regarding the starting / in rush current of a motor. If the motor acts like an inductor, how is there a high inrush current?
reply
Thank you for the video. I have a question regarding the starting / in rush current of a motor. If the motor acts like an inductor, how is there a high inrush current?
reply
valve0radio
In this DC circuit, i thought only a capacitor would act as described where the inductor is? I thought inductors would only become a short circuit with smooth DC
reply
In this DC circuit, i thought only a capacitor would act as described where the inductor is? I thought inductors would only become a short circuit with smooth DC
reply
Joe
Good explanation but a series of uses and circuits showing cool things that you can use it for to solve a particular problem would be nice. Like as a choke for example.
reply
Good explanation but a series of uses and circuits showing cool things that you can use it for to solve a particular problem would be nice. Like as a choke for example.
reply
VLADI
Good explanation but I was expecting a demonstration of a simple electronic setup where its workings (the short continued flow of current) is demonstrated.
reply
Good explanation but I was expecting a demonstration of a simple electronic setup where its workings (the short continued flow of current) is demonstrated.
reply
Andrew
This is so helpful, taking a circuits class and its really hard to conceptually understand what is going on in a circuit by looking at a plain diagram
reply
This is so helpful, taking a circuits class and its really hard to conceptually understand what is going on in a circuit by looking at a plain diagram
reply
integrated
I usually call electron flow engineering flow sometimes but stopped due to teachers saying it was not correct. I thought it was funny. Guess not.
reply
I usually call electron flow engineering flow sometimes but stopped due to teachers saying it was not correct. I thought it was funny. Guess not.
reply
Ash
Good stuff, would be helpful if you showed a few real world pcbs at the end and explained what the inductors were being used for in each circumstance.
reply
Good stuff, would be helpful if you showed a few real world pcbs at the end and explained what the inductors were being used for in each circumstance.
reply
Ibrahim
Thanks for the videos man, I really appriciate it.
I learn more in your 10min video, than my teachers could teach me in one year
reply
Thanks for the videos man, I really appriciate it.
I learn more in your 10min video, than my teachers could teach me in one year
reply
ge755dhk#
Why all four compass moved different amount than one another. And it happened in both the cases - normal + - and contact reversal
reply
Why all four compass moved different amount than one another. And it happened in both the cases - normal + - and contact reversal
reply
Add a review, comment
Other channel videos
