Magnapack

[MileHigh]

Bill:

Of course we see many clips and free energy propositions with magnets being used as cores for coils in various setups.  It's actually one of those things that doesn't make sense but still has a life of its own.  The logic is simple:  We know coils need AC flux to respond and we know magnets produce unchanging "DC" flux.  Therefore the coil will be unaffected by the magnetic property of the core.

It's safe to assume that using a magnet as a core will be inferior to using a regular ferromagnetic core material.  Have you ever seen any clips where someone does an A-B comparison test between a regular core and a magnet as a core in some kind of setup?  The other thing worth mentioning is that if you use a magnet as a core you risk demagnetizing it.

MileHigh

[Pirate88179]

MH:

Thank you for the response.  No, I have never seen anyone do an A-B comparison of magnetic vs ferromagnetic cores, all else being equal.  It seems to me this might be a valuable experiment for someone to do.

I am thinking that using a magnetic core would make the device operate at a very high frequency.  The reason I say this is because, if you build a JT and it squeals, you can raise the frequency above human hearing by placing a neo on the core, then, you can't hear it.  This I have done many times but, I had no idea that the entire core could be of a magnetic material.

Possibly, one could take a speaker magnet, like Tinman, which is ferrite, and heat it above the currie temp. for that type of magnet, and wind up with a nice large ferrite core.  (Now non-magnetic)  This is something I may look into doing as the sources for the large ferrite cores appear to be long gone, unless you want to pay a lot of money.

Thanks again,

Bill

[Magluvin]

OK, I am lost here.  A long time ago I had the idea of using a neo ring for a JT core and was told that you can't use a magnet for a core because the field never collapses completely and therefore you can't get anything out of it.  So how is Tinman seeing anything out of this set-up?

As I said, I am lost and just simply do not understand this at all.  (Nothing new for me)

Bill

The magnet will work as a core, just a bit different.

We have seen others devices with magnets in the cores. In industry they are called Hicore and Hiformer, hiformer for transformer with magnet in core to magnetically bias the core. Hitachi Magnetics Corporation.

In a pulse mode situation, The greater current handling capability is clearly evident, about twice the volt-ampere capability before saturation as the same core without the bias magnet. Of course the pulse polarity will have to be according to the set magnet polarity, as the opposite polarity will reduce the current handling.

In your situation using a ring magnet, the magnetic field is polarized on the flat sides of the ring, not through the rings circumference like a Hiformer would be, but the ring you have will have some affect on what transpires in the transformer vs a core of like size.  That would have to be looked at to see what those differences are. And being the ring magnet is not polarized against nor with the coils magnetic polarity, more like perpendicular, input electrical polarity makes no difference from what I gather.

Demagnetization of the magnets in these devices used to be an issue till the advent of rare earth magnets.

Mags

[MileHigh]

Bill:

My suspicion is that the neo magnet reduces the energy storage capacity of your JT core.  In other words, it lowers the effective inductance of the core + coil arrangement.  That should tend to make the JT oscillator run at a higher frequency.  Some bench tests could be done to see if an approaching neo will do that to the core.

MileHigh

[tinman]

Hi Tinman. I've figured out how it works (Rotary Transformer). It is genius mate.

Is this open source? Given the principle of operation - it's possible to improve on... The universal-motor hack isn't bad, but it's far from an optimal configuration... Really need more stator poles, not so big, eh...

I think you've totally cracked OU with the RT mate. Awesome.

Do we need a new thread here, to cover the RT?

Tim

Hi Tim
The universal motor was just handy at the time,and yes-it could be made much more efficient, but we use what we have handy at the time.You could have more pole's on the stator,but no more than half of that of the rotor.
Feel free to start a thread on it if you like,and share how you believe it work's,im interested to see how close you are.