Tesla's "COIL FOR ELECTRO-MAGNETS".

[SeaMonkey]

To those who are busily working to get
their "builds" going it may seem that
MileHigh is needling.

MileHigh is usually correct about the
technical misconceptions he is striving
to set straight.  He truly is attempting
to encourage fruitful thought and beneficial
research efforts since real knowledge will
ultimately lead to greater success and
the avoidance of costly mistakes.

It's an ages old phenomenon;  those who
try to help others see their error are
frequently thought to be busybodies and
irritants.  At least, until wisdom finally
takes up residence.  We have a tendency
to want to cling to "our beliefs" no matter
what.  Admitting wrong is very painful.

[synchro1]

Everything I explained about "Impulse Magnetization" has been ignored. JLN demonstrates %100 energy transfer between his serial pancakes with no heat loss what so ever in his Gegene experiments. Regular coils would fry if you attempted that. Stop trying to trivialize these differences, and the way his coil for electro magnets worked had nothing what so ever to do with running D.C. current through the coil.   



             

[MileHigh]

SeaMonkey thank you for your kind and wise words.

Synchro1, I have always encouraged people to experiment with this coil, notwithstanding what others try to say in some kind of Orwellian nightmare.  You have to look at this coil configuration and take it at face value and then do some experiments.  This notion that there is some "secret sauce" associated with this coil stems from the fact that there is a Tesla patent and the "Cult of Tesla" comes into play.  When you actually look at the coil "on paper" you can deduce how it will operate in real life with a high degree of confidence.

JLN demonstrates %100 energy transfer between his serial pancakes with no heat loss what so ever in his Gegene experiments. Regular coils would fry if you attempted that.

Oh really?  How do you know that "regular coils would fry?"  See, you are just making it up to try to bolster your claim.  You are playing the "Cult of Tesla" game when you say that.

Let's look at the issue of two coils coupling with each other without any core material.  We are going to assume that the application is not a power coupling application since there is no core.  We will assume that it is a signal coupling application.

Well, if you wind two separate wires together on a spool then you have a bifilar coil.  And in this case I mean a true bifilar coil with two separate wires.  That should give you pretty good coupling.  However, the coil-to-coil capacitance is relatively high and may become an unwanted annoyance here.

What if you have two separate coils and you want to couple them?  Should you put two pancake coils facing each other?  The answer is no, there is a serious limitation for coupling when it comes to pancake coils.  The inner coils are small and will not cut as much flux as the outer coils.  On the other hand, two regular coils with a narrow length or "z" dimension facing each other will couple much better.  They also won't have all of that nasty flux-self cancellation that you get in a pancake coil.  Every loop in the "sender" coil will generate a nice blast of magnetic flux through the same circular aperture.  Similarly, every loop in the "receiver" coil will "catch" almost 100% of the flux being generated by the "sender" coil.  There will be no significant coil-to-coil capacitance to deal with in this case which might be highly desirable for your signal transmission application.

So what that means is for pure AC coupling applications without a magnetic core, and using two separate and distinct coils, that ordinary vanilla circular loop coils will most likely outperform pancake coils in most if not all applications.

Another point worth mentioning is that I am still being very generic in my comments, and generic comments when it comes to electronics can be dangerous.  For example, if you are doing a signal coupling application, what frequency range are you trying to couple?  That's probably the most important question and it must be answered as part of the process of either selecting or designing a coil.

So the moral of the story is to examine each case on it's own merits.

The second moral of the story is that there are literally thousands of configurations of stand-alone coils and transformers.  They are available in all sorts of shapes and sizes depending on the application.  For all I know you may be able to purchase a commercial off-the-shelf coil as per Tesla's patent assuming that there is an ultra-niche application for that configuration.  However, my gut feel is telling me that it is highly unlikely.

MileHigh

[synchro1]

You're a chronic pain and a fraud. Try to understand this and stop trying to defraud everyone with your "Cult Paranoia"!


The Tesla series bifilar has zero reluctance to change in current direction. Running A.C. through a regular coil generates heat because the single wire coil reluctance to change in current direction is greater then zero. They would smoke with JLN's input. Stop trying to pretend the coils act the same way. You're so dead and stupid wrong you should get help with your persistent delusions!    

[MileHigh]

Synchro1:

I am telling you like it is and it's hard to decipher what you are saying technically.

Running A.C. through a regular coil generates heat because the single wire coil reluctance to current change is greater then zero. They would smoke with JLN's input.

Can you explain that some more because I can't make head or tail of what you are saying?

I think I may have gotten it now.  You are equating inductive reluctance to resistance and assuming that will heat up the wire. That's wrong and just shows that you don't understand how a coil works.  The inductive reluctance is there because the coil is building up a magnetic field.  The energy is not heating the wire, it's building up the magnetic field.

Honestly Synchro1, with statements like that, you need to lean the basics.  Books, YouTube, surf the net, do something.

You have the delusions when it comes to this stuff, but you can get up the learning curve if you really want to.  It's all up to you.

MileHigh