Hello, to all. First of all I would like to thank to all who has helped me to understand my problems! Thank you very much!
Yesterday I reading some books and found some informations about coils and inductors. I made some experiments about coils and I had take some good results and continued the reading! But in experiment I imagine how the inductor will work better? When it's coils is diluted or concentrated?

 

But in experiment I imagine how the inductor will work better? When it's coils is diluted or concentrated?

You want the magnetic lines from one wire to interact with the lines from the adjacent coil wire as much as possible so you want the wires as close together as possible.
Thus for the most inductance, you want a tightly wound coil.

 

You want the magnetic lines from one wire to interact with the lines from the adjacent coil wire as much as possible so you want the wires as close together as possible.
Thus for the most inductance, you want a tightly wound coil.

No! I mean when the inductor works better? When its coils is diluted or consecrated? That all I want to know! If it is tight or it is long or small it doesn't matter for me! I just wanted to learn when from this 2 conditions the inductor produce more electromagnetic lines! (sorry I didn't add the electromagnetic lines in my question, forgive me it was my fault!)

 

when from this 2 conditions the inductor produce more electromagnetic lines

Why are concerned about the number of electromagnetic lines if you are not interested in the inductance?

 

Why are concerned about the number of electromagnetic lines if you are not interested in the inductance?

Aaaaaah nooooooo !!! I want to know not a number of lines, not a thickness, not coil along, not a diameter! I want to know when the inductor or coil produce more magnetic power, when the coils is diluted or consecrated! I don't care for the other things. And if I wasn't interested on this theme I could not ask this question! Its looks like I want to know about electricity and instead of this I take the information about ecology! What does this have if I'm interested or no to the question I did? I'm interested very much on the function of all the electronic components, and I make very hard education so as to learn about all of them! Some things is not written in the books that I read and that why I ask questions to make an additional research about this components! And I also ask questions because I don't understand some things! But its helpful for me if someone could give me a links to an additional books that have some additional informations about this component!

 

No reason to get all frustrated.
If English is not your mother tongue that's understandable and fully tolerated here.

Getting good and accurate answers require asking the proper question in the first place.
We still don't know what you are asking.

The magnetic flux is a function of the length and diameter of the coil, the number of turns, the magnetic permeability and the current through the coil.

The words "diluted", "concentrated" or "consecrated" do not apply in this context.

 

If you answer your own question, you'll will never forget it. Place a compass at a distance to get a deflection from an energized coil.
Keeping the same distance between compass and coil..........spread and compress windings on coil.......and watch compass.

Now you can tell us..........did the magnetic fields get stronger?.........or weaker?

 

No reason to get all frustrated.
If English is not your mother tongue that's understandable and fully tolerated here.

Getting good and accurate answers require asking the proper question in the first place.
We still don't know what you are asking.

The magnetic flux is a function of the length and diameter of the coil, the number of turns, the magnetic permeability and the current through the coil.

The words "diluted", "concentrated" or "consecrated" do not apply in this context.

Oooooh sorry I didn't said that earlier! I from Greece and I understand a bit English, but as you said the English is not my mother tongue! My own language that I understand very well is Greek and Russian! This 2 languages I understand very well!

 

Good to know. Not a problem.

In order to focus on your question, fill in the blanks,

For a wire wound inductor, how does ____ change when I change ____ ?

 

Oooh compass... I haven't compass! But I will find a way don't worry! I learned that if I will make a magnetic field to the steel it will keep the magnetic power! I will try to make my own compass. Its not difficult, I have all the components for the compass. I have to find only magnet

 

Good to know. Not a problem.

In order to focus on your question, fill in the blanks,

For a wire wound inductor, how does ____ change when I change ____ ?

I think For a wire wound inductor, how does electromagnetic field change when I change it?
I'm not really sure about that but let's hope it will be right
Because the books that I read they are written in Greek language not in English but its OK!

 

By the compass I should to know how fast it will turn to the coil?

 

I think For a wire wound inductor, how does electromagnetic field change when I change it?
I'm not really sure about that but let's hope it will be right
Because the books that I read they are written in Greek language not in English but its OK!

Maybe you should post the Greek and we will find a translator.

how does electromagnetic field change when I change ____?

The measurable result is the magnetic field.
What property of the coil are you changing?

 

Can I ask? What is wire wound inductor? Because I translate this words and they looks like this phrase: "σύρμα πληγή πηνίο". I didn't understand what is that about but if I remember well, if you will change the current flux of the inductor, will change and its inductance. Because if for example I will give +5 -5 +5 -5 volt or for example +500 -500 +500 -500 mA to inductor it will increase its inductance! This phrase "σύρμα πληγή πηνίο" means (I will try to translate)
σύρμα: cable, wire.
πληγή: wound, (when a boy get accident it takes wound (when a part is a bit wounded and flows some blood from this part (hand)))
πηνίο: inductor

 

Let me try and reframe the question for you.

How does one make a wire-wound inductor?
Answer - You take a length of magnet wire (enameled copper wire) and wind it around a piece of iron rod.

How does one make a wire-wound inductor with a large inductance value?

The inductance L of a coil is given as:

\( L = \frac{\mu N^2A}{l}\)

where

μ = magnetic permeablity of the core
N = number of turns
A = cross-sectional area of coil
l = length of coil


http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/indcur.html

 

http://cse.ssl.berkeley.edu/SegwayEd/lessons/exploring_magnetism/Exploring_Magnetism/s2.html

 

Oooo thanks for info. OK I will keep it in mind

 

Aaaaaah nooooooo !!! I want to know not a number of lines, not a thickness, not coil along, not a diameter! I want to know when the inductor or coil produce more magnetic power, when the coils is diluted or consecrated! I don't care for the other things. And if I wasn't interested on this theme I could not ask this question! Its looks like I want to know about electricity and instead of this I take the information about ecology! What does this have if I'm interested or no to the question I did? I'm interested very much on the function of all the electronic components, and I make very hard education so as to learn about all of them! Some things is not written in the books that I read and that why I ask questions to make an additional research about this components! And I also ask questions because I don't understand some things! But its helpful for me if someone could give me a links to an additional books that have some additional informations about this component!

Hi,

Yes there are some language barriers here as others have mentioned now.

First, a coil does not produce power. It is a wire, and wires do not produce power no matter how you arrange them. Even if there is a moving magnetic field nearby, the wire does not produce power, it would be the field transferring power to the wire.

I think maybe what you meant was 'strength', as in the strength or intensity of the field. In this case you can use the Law of Biot-Savart to find the value of the field at a point, and that would show you that there are many different points you can look at and how they each change with a change in the spacing of the turns of the wire that make up the coil. You basically use that law and apply it to a wire in the shape of a helix, and allow the helix 'turns' spacing to vary in width. You can then see the effect on several key points such as:
1. At a distance along the axis.
2. At a distance out from one side.
3. Somewhere inside the coil such as right in the very physical center.

What would come from that is the main property is that the MORE turns that are CLOSEST to the point being measured, the higher the intensity of the field at that point. This of course means that if you measure at a point out along the axis away from the coil and you have the turns very close, if you spread the turns but keep the distance from that one end of the coil the same, the magnetic intensity will decrease because you are moving some of the turns farther from the measurement point. However, if you then flip the coil using the closest end to the point as the pivot point, the intensity will increase because you just moved several turns closer to the measurement point. So this concept is really quite easy to understand if you dont need quantitative data, and if you do need that then you have to invoke Biot-Savart, and if you do a search you'll find lots of info on this law.

Next we might talk about the inductance itself. I dont think you are that interested in this but i'll mention it quickly just in case.
If you start with a coil of 10 turns closely spaced and measure the intensity at a point close to the coil out to one side but centered along the axis you'll see a certain intensity, and if we removed the drive from the coil that field would act on the coil to produce a current, and the level of current would depend on the distance from each turn to the measurement point. Now if we spread the turns apart, out to the side at the same measurement point we would again see less intensity and also there would be less intensity to help create current in the coil when we disconnect the drive source. This would mean we would see less self inductance with turns spread. This is again because there is more distance involved.
Thus, with turns spread the inductance goes down and this is a trick used by radio hobbyists sometimes to adjust the reasonant frequency of their tank circuits. The Q of the device goes down of course but that's not usually as much of a problem.

 

Ah, soo!

That is what is the question?

How does the inductance change when you squeeze the windings together vs when you stretch out the windings?
that is, compress the coil vs expand the coil?

 

At last someone who understood my question and all the peoples who helped me! At last someone understood my question! I just wanted to know the density of the inductor if the coils if you give them power supply will give more density. Thanks man and all of you who helped me with my question