Critical pulse motor core info

[aether22]

Whoa!

Ok, THIS IS BIG

I just woke up and still had eddy currents on my mind from the night before and I realized that for open path magnetic systems EVERY SINGLE METHOD EVERY USED TO DIVIDE THE CORE IS USELESS OR NEARLY SO! (there are few conventional devices that have open magnetic paths)

The ONLY way to do it is to have a cut ring, or a coil with or without breaks in it. (but obviously not shorted and must be insulated as it is more vulnerable than normal laminates)

This impacts every Adams motor ever made, EVER, this impacts Thanes generator, this impacts the majority of OU electromagnetic designs.

This has either been hurting the efficiency of, or possibly even a hidden ingredient of every open circuit electromagnetic device.

Let me explain, with open paths the flux leaks out so the further you get away from the source the field is less strong and so is the induction from it if time varying.
And so currents induced in strongly induced locations will short through poorly induced locations.

The amazing thing is that if you think about it, it matters not one iota if you cut the core up length wise, think about it, current will still flow just fine. (yes, it would be odd looking but it will still flow pretty much the same, the fact that the currents must pass each other in a long thin wire (or a laminate strip) means nothing!)

[aether22]

With almost 200 reads of this in the New section and almost 40 here and only one off topic reply, figure I might need to encourage reply.

Do you understand how this invalidates almost all methods for avoiding eddy currents in open magnetic circuit cores?

Do you Agree or disagree or are you unsure?

Do you agree that is is a reasonably important discovery since it effects most every magnetic Free Energy magnetic device and hence the word needs to get out? (very few employ a closed magnetic circuit)

Or do somehow think that it is of little importance somehow?

Any reply would be appreciated.

I wrote what I was thinking and feeling at the time, maybe the shouting and such put people off? But I think it would be a loss to the FE community to not have this info spread to help as many experimenters as possible.

I believe that other than making cores from a non conductive (or high resistivity) material there are only 2 ways to make a core for open magnetic circuits compatible with this realization, one is to have insulated (must be insulated) steel wire, the other is to have magnetic particles suspended in a resin.

Bill Muller made cores with black sand that sound suitable.

[zott]

are tou trying to say that a core in the center of a coil is better if it is a solid piece of steel rather than  cut steel welding rods coated in shellac.

[Mr.Entropy]

But laminations actually work pretty well.  By Faraday's law, the voltage driving an eddy current around it's loop is proportional to the rate of change of flux through the loop.  If you divide a solid core into 20 laminations longitudinally (so that the laminations are parallel to the flux lines), then the largest possible eddy current loops will have 1/20th the area and will be driven by 1/20th the voltage.

In situations where this isn't sufficient (low inductance, high frequency), non-conductive ferrite or powder-based cores are used.

[aether22]

are tou trying to say that a core in the center of a coil is better if it is a solid piece of steel rather than  cut steel welding rods coated in shellac.

No, I am saying that laminations or rods stuck together are little better than solid steel at suppressing eddy currents in open magnetic path devices. (though they work fine in closed path)

An insulated steel coil or insulated steel particles are the only ways to stop induction. (or a stack of insulated cut washers)
Other than of course non-conductive materials such as ferrite's or powder cores as Mr.Entropy mentions.