Searching for Buddy in promising magnet motor Project.

[dieter]

Next the minimum and maximum of magnetic field strength you can achieve with this shield inside the coil:

[dieter]

Next thing ist most important: while the shield is approaching, no fieldlines that go in and out of its bottom say should ever show their butt to the coil!
Butt is the backside of the arrows, btw. We want any field that is between the shield(=rotor) and the coil to be straight from top down to bottom as much as possible, at any moment. The reason why is, we don't want any repulsion, only a variation of attraction.

[dieter]

So, basicly, from the coils point of view, the rotor is just a PM. But because it also shields the big, stator magnet, it will reduce the total field strength when you move it closer. Yet, it's still a magnet. Lenz kicks in, "thinking" the rotor is moving away (due to decreasing fieldstrength) and therefor Lenz does what? Yes, attract the presumably escaping rotor, while in reality the rotor is getting closer.
I think this is what people don't get. Lenz drag becomes Lenz accelleration, if you simply make the field decreasing while the rotor gets closer.


Yeah, that's all very nice, but there are certain factors that clearly indicate a narrow bandwith, in which this inverting trick can be used at all.


First of all, if we drop the magnetic fieldstrength, we cause current flow in the coil, and it will be of like magnetic polarity, like the main magnet etc. remember that! As one can imagine the coils secondary magnetic field adds to the primary field, and this reduces practically the fieldstrength drop we need to get current flow... the snake bites its tail.


However, there may be a narrow band in which the accelleration has it's peak, that could be half of the magnetic potential between shielded and unshielded.


To simulate this, I have replaced the coil by a weak ceramic magnet. It's static magnetic field symbolizes the current we may extract. Notice that we still have a variation in field strength. This may very well be the narrow regime in which the Reversal of the Lorentz force is possible.

[dieter]

Wouldn't just placing a strong neo at one end of a 6 inch long, 32nd of an inch,
piece of laminate steel ,give you your, strong, thin, magnet ,at the opposite end?
artv

Thanks, but I'm afraid not. Iron typically and excessively adopts the magnetic polarity based on its own shape. Only oversaturated iron ignores the shape. So if you stick a magnet to a nail or sheet, the poles will be at the two ends, which is what I use in the flield shaping part, but I have to hide this shaped field behind PM, see also recent pics.

[dieter]

[/font]@DeiterTo be honest, after the first standard obscurities, when you Began to vaguely describe your idea...You lost me.I have no idea in what context you mean to say "increasing magnetic field"Because you associate this also with "approachig field" concepts.To me these are two separate mechanisms of magnetic fields.Strength, being a matter of density, separate from field dimensions Together, size and strength of the field give its characteristics of field gradient.Electromagnetic fields are different, in that they have the electric vector andassociated time constant.In a permanent magnet, the electric vector is 90-degrees to that of induction,and manifests itself as a purely magnetic effect on the large scale.Thus there is no "time".I tried to follow you through your rants about other people's inability toUnderstand what you are talking about, and then again you lost meWhen you described an unobtainable magnet size.Now I'm in America And it seemed to me that you want a magnet That is 2inches in diameter , and 0.2 inches thick???That would likely break itself in any conceivable use platform.Is there no way for you to use something thicker?If not, my suggestion would be to sacrifice "field strength"For the ability to obtain a smaller physical size magnet.Something like ironferrite or Sumeriam-cobaltThese could be safely cut that thin and hold up against Minor abuse.There are also magnetic tape, and sheets of thin stuffYou can cut.These are mostly soft-rubber magnets with some %ferriteand are weaker than ceramics of similar dimension.Ceramicferrite magnets may work for whatever you are trying To do, just use caution when breaking or cutting them.You can scratch a groove in a ceramic and get them toBreak along fairly straight lines.As far as "back emf" is concerned:Here is only one Authority whom understands the process Of back emf, and how to eliminate or avoid it.His name is Jim MurrayThis is just a you tube video, short and to the pointBut I recommend viewing a few of his lectures.https://youtu.be/HK3JOlY0V8YThis is the foremost expert in the field of back-emf researchAnd the only man on earth to successfully demonstrate how toAvoid back emf in three formats: magnetic-mechanical, electric,And with solid-state electronics.He is also an expert in recycling electricity through circuits,Using feedback loops and switches to return current through aCircuit, from whence it came.Thus double, triple using it, or more until it is all "really used".Yes- he figured out that we don't use most of our electricity We just pass it through the circuit and let it go.He knows how to catch it and bring it back.

[/font]
@Smoky,


thanks a lot for your suggestions. Did I really say "increasing magnetic field"? Not rather "Increasing magnetic fieldstrength"?
Well you guys think way to much. You assume this is some super complicated, abstract stuff, while I am actually just speaking of a permanent magnet, that is moving towards a coil. No surprise the magnetic field, at the location of the coil, is getting stronger. This is simple stuff, don't overcomplicate it ^^


Anyway, thanks.