Homopolar Generators (N-Machine) by Bruce de Palma

[tim123]

Yes.   With two identical 12" disks with a large copper plumbing cap [hub] soldered to the center of each, I can add an array of magnets in the middle with polarity facing each disk differently; the rims will allow a band of Cu to attach the disks and complete the circuit, pick off power at each hub.

I think that the connection at the rim between the 2 disks would have to be a brush - or a conducting belt as in the Hathaway patent...
From what i understand - if it's rotating with the disks - then nothing gets generated. I could be wrong...

So, copper tube conducts the field current, creating a field without steel backing?   Will that truly be a uniform field?  Why tube over solid conductor?

It doesn't have to be tube - any conductor will do - but for induction heating tube's often used because of the high-frequencies - and skin effect - and because you can run water thru the tubes to cool them. They don't use ferro-stuff to enhance the field - because the freq's too high...

TBH - it's probably a bad idea. Last thing you want is red-hot copper plates... lol.

There are some sea turtles that can swim up to 35 miles per hour...

ask.com


Tim

[TinselKoala]

Well, I'd just make the measurement of the voltage on the cap after the single cycle. I'm sure that it can be calculated though, just not by me (until I see the appropriate formulae).

These references may contain the equations you need:

http://www.maximintegrated.com/app-notes/index.mvp/id/2031
http://www.torex.co.jp/english/news/item/MKT-08E-6DCDC2.pdf

(and 3 meters/second is about 6.7 miles per hour; 35 mph is about 15.6 m/sec, a truly fast turtle)

[mariuscivic]

Hi guys!

Nothing happening here for a while...so i'll give it a try.
I have assembled an small HPG and after some tests , found some output under the spining magnet with a normal coil.

Here is the vid  https://www.youtube.com/watch?v=B92Xxx_fW28&feature=youtu.be

The smaller magnet is a 30 mm diam. radialy magnetised working as a pulse motor.
The bigger magnet is a 60mm diam. axialy magnetised. Under this one there is a coil that gives some output.
From what I know there should not be any kind of output under that magnet. What do you think?

[Magluvin]

Hi guys!

Nothing happening here for a while...so i'll give it a try.
I have assembled an small HPG and after some tests , found some output under the spining magnet with a normal coil.

Here is the vid  https://www.youtube.com/watch?v=B92Xxx_fW28&feature=youtu.be

The smaller magnet is a 30 mm diam. radialy magnetised working as a pulse motor.
The bigger magnet is a 60mm diam. axialy magnetised. Under this one there is a coil that gives some output.
From what I know there should not be any kind of output under that magnet. What do you think?

Hey Marius

I wouldnt think there would be output in that config either.  Even if the flux lines are moving with the magnet, the field is cutting both sides of the coil at the same time. Try turning the coil 90deg so just 1 side of the coil is close to the mag. Even try a core to further isolate that one side of the coil to the dense flux close to the mags surface.  Just for giggles.  Im assuming there will be little output then also. If not, then I would try a ceramic magnet next, to eliminate the possibility of the neo mags coating causing flux dragging due to lenz in the coating. there may be some serious losses due to the coating in any build honestly.  I know non coated neos can be had. Just use a urethane to coat, or paint.  Ive seen plastic coated neos.

There could be some inconsistency in the mags field strength and that could be causing the output with fluctuations as it spins.  Lots of mags are inconsistent even from the same batch.

I had learned of those inconsistencies back working on the Whipmag over at Fizzx.org  Tk was the one that discovered these issues.  I had big issues with it in my Magluvin Magnet Motor MMM. Poles were not always centered, different field strengths. Things that adjustments to fix the problems threw off balance, etc.  Big headache.

If someone were to attempt an all magnet motor, or any motor with many magnets, they should buy many mags and design a setup to find matched sets from the bunch. Similar to matched set output transistors in quality amplifiers.  Even if we are just hoping for a weak , very slow, but running motor, such imbalances can screw everything up, and we may never see a runner, just because magnets were not somewhere near perfect. Or like in a bicycle hub motor, if all the magnets were consistent, there would be better efficiency.

Mags

[synchro1]

Hi guys!

Nothing happening here for a while...so i'll give it a try.
I have assembled an small HPG and after some tests , found some output under the spining magnet with a normal coil.

Here is the vid  https://www.youtube.com/watch?v=B92Xxx_fW28&feature=youtu.be

The smaller magnet is a 30 mm diam. radialy magnetised working as a pulse motor.
The bigger magnet is a 60mm diam. axialy magnetised. Under this one there is a coil that gives some output.
From what I know there should not be any kind of output under that magnet. What do you think?

Why not try and get some balance magnets to spin around at resonance like Jerry Bayles?


Here's his oscillating satellies with one disk on the right side; Side makes a difference!
 


http://www.youtube.com/results?search_query=Jerry+Bayles