Perm. magnet only core with iron shell, motor coil

[gyulasun]

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I believe that Iron cores do not increase the strength of a mag coil, but rather significantly concentrate it. (I may be wrong about this)
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Hi Floor,

I agree, ferromagnetic cores collect flux from their vicinity and they are not flux amplifiers. Due to their relatively high value permeability they are able to conduct and guide magnetic flux much more readily than materials with much less permeability.

Gyula

[gyulasun]

I think you are correct, in regard to the iron shell shorting the magnetic current.  A different shell design is needed.

Well, you may have already read my answer to Tim on the iron shell.

As an addition to the 'super' electromagnet (albeit I do not like to use word "super") a big advantage is that the permanent magnet is fully "hidden" to the outside "world" when the coil is OFF so the setup can also be considered as a permanent magnet ON/OFF switch...

Gyula

[Floor]

@Gyulasun

Thanks for the input !

I had left this topic, temporarily, in order to build some mag field interaction test devices for perm mags. The next generation of devices will be
more accurate and versatile, and able to test electro mag designs as well.  I'm busy with some tests, at this time. But I will be offering / willing to test suggested designs, perhaps within two weeks or up to  few weeks from now.


               cheers
                         floor

[tim123]

Hi Gyula / Floor...
  I agree that the steel casing itself would contribute some flux. The point I was making was that if the PM core's field cannot penetrate the casing when the coil is switched off - then that won't change when the coil is on - so the field from the PM is never seen outside the casing, coil on or off.

Floor, my understanding is that an iron core absolutely does contribute it's own magnetic field to the arrangement. It's not just concentrating the field produced by the coil - it's generating its own. This is why you have 'B / H Curves' for ferromagnetic materials. As the 'H' field from the coil increases, the 'B' field from the iron increases non-linearly to the saturation point.
http://en.wikipedia.org/wiki/Saturation_(magnetic)

The problem I see with this approach is that overunity has nothing to do with magnet strength at all. Stronger magnets = stronger Lenz forces in opposition. So stronger magnets alone are of no benefit. The key to OU has to be the change the geometry of the generator - so the Lenz forces are not applied back to the rotor...

It occured to me today - when I was writing the prev post - that perhaps the generator coils could aim their lenz-forces at each other instead of the rotor... I've often wondered if it'd be somehow possible to use the Lenz force to your advantage - i.e. to turn the rotor, and I do think it is possible. Standard generators & motors are pretty basic - and just throw the coils & magnets directly at each other... A bit more subtlety is the key I think.

[tim123]

Hey folks,
  I've posted a new thread to discuss my re-arranged generator - so I don't go off-topic here.
http://www.overunity.com/13730/rose-tinted-lenz-generator/