Magnetic fields within a toroid inductor.

[MileHigh]

Tinman:

With the application of Ampere's Law and by drawing an Amperian loop inside a toroid you can derive the formula that tells you what the magnetic field strength inside a toroid is.

In classical electromagnetism, Ampère's circuital law, discovered by André-Marie Ampère in 1826,^[1] relates the integrated magnetic field around a closed loop to the electric current passing through the loop. James Clerk Maxwell derived it again using hydrodynamics in his 1861 paper On Physical Lines of Force and it is now one of the Maxwell equations, which form the basis of classical electromagnetism.

The real thing:

http://www.youtube.com/watch?v=pCSHcftPAIM

Is the magnetic field contained within the toroid core?,and wich field is it-north or south?

I have posted several times recently that there is no such thing as a "North field" or a "South field" when it comes to a magnetic field.  You have to wrap your mind around that one to understand magnetic fields.

MileHigh

[Magluvin]

Hey Cap

Yeah, I thought of just deleting all. But then there is a post that is blank, leaving some thinking, what was he going to say, but didnt? So I usually say something when it happens.

Mags

[Magluvin]

Tinman:

With the application of Ampere's Law and by drawing an Amperian loop inside a toroid you can derive the formula that tells you what the magnetic field strength inside a toroid is.

The real thing:

http://www.youtube.com/watch?v=pCSHcftPAIM

I have posted several times recently that there is no such thing as a "North field" or a "South field" when it comes to a magnetic field.  You have to wrap your mind around that one to understand magnetic fields.

MileHigh

I strongly disagree. 

"The real thing:

http://www.youtube.com/watch?v=pCSHcftPAIM"

At 5:40, and I was waiting for this, listen to what he says about fields in the hole of the toroid.

There are fields in that open area. This is where the windings have mutual inductance. This is where fields of each winding are able to 'cut' other windings or turns of the coil in order to have mutual inductance. The pdf I posted above explains it quite perfectly and it describes 'why' those fields could not possibly only remain in the core, which is very important to understand.

Lets take the toroid diagram in the vid and make it a transformer. Primary on the left and secondary on the right. Now, if the primary induces a field in the core, how does the secondary get induced if the field is only in the core?   The wire does not have 'feelers' out there that detect if a field is 'locked' in the core. The field of the primary has to 'cut' the windings of the secondary. It is basic mutual induction. So why is that not explained in the video???   The pdf in my previous post, and I will repost it here, explains it perfectly.  Dont get board with the pdf. Its 18 pages and it should be read till it is understood as a whole. It corrects the problem of the ideas presented in this vid posted by Milehigh. 

If you put a wire through the very center of the toroid opening,not even touching any toroid windings or the core, you will get current induced into that wire from an input to the toroidal coil. So how can that be, if the field is only in the core? ?

There are many vids on YT that show this 1 wire through the middle.




Mags

[MileHigh]

I told you that I don't want to have any interaction at all with you and I mean it.

Don't interact with me at all.

[Magluvin]

I told you that I don't want to have any interaction at all with you and I mean it.

Don't interact with me at all.

Whatever dude.

That vid you posted is malarky with math to explain the malarky. People deserve the truth, and that vid isnt it. I was wondering if the vid would get into those facts and surprisingly it did.

Yeah, you PM'd me. And I didnt respond. If I see you preaching garbage, I will respond. And I did. I will post where ever I please.  Try to get me banned on that.

Mags