Homopolar Generators (N-Machine) by Bruce de Palma

[gravityblock]

Have a Few Questions and there are so many pages
simply asking might be the fastest way to get answer.

How hot does a faraday disc get?
With eddie currents, or otherwise?

The more load you put on it, the hotter the disc will get.  Eddie currents aren't really an issue if the entire conductive disc is inside the magnetic field.  This is the main reason not to have the diameter of the disc to be much larger than the diameter of the magnet.

How hot do the bearings get?

Does the current have any effect on conductive bearings?

Assuming the bearings aren't part of the circuit then the current won't have any affect on the bearings and they would get hot just like the bearings in all other motors or generators.

Assuming the bearings are part of the circuit then drawing high current could cause the bearings to heat up and weld together.  The bearings in this case would again heat up proportional to the amount of current you are extracting just like the conductive disc.

IMO we need to be focusing on eliminating the counter torque.  Until this is achieved then no OU.  If you want a welding machine or for hydrogen production then go for it.

Here's a few simple ways to increase the voltage:

1)  Increasing the strength of the magnetic field.
2)  Increasing the radii of the magnets and conductive disc.
3)  Increasing the RPM.

A brief side note on the radii of the magnets.  It is extremely difficult and expensive to find a very large radii neo magnet.  You can stack many strong neo magnets in a N/S/N/S/N/S configuration to form a large cylinder magnet and extracting the current on the outside circumference at half the length of the cylinder magnet.

There are other ways to increase the voltage but they are a little more complicated.


GB

[Foggy-Notion]

Well, if the bearings are metal and on the conductive copper shaft,
then the bearings are technically part of the circuit, no?
That is current is flowing through the shaft,
it will also flow through the bearings,
charged balls will be turing.

Hot based on load?
So I will have a heater (and) HHO for my Hot Water heater, cooking, etc?
Mobile HHO maker for my vehicle?  Hmmmm?

But if magnets spin with the disc, "counter torque" is minimal, if any.
And why would I want to use neodymium (conductive) magnets?
Are we making a magnetic brake, the opposite of what we want?
Ferrite Magnets are the correct magnets for N-Machines.

"There are other ways to increase the voltage but they are a little more complicated."

Oh?  But not a one word helpful hint?  Not even a link eh? 

Well I think I'll just spin 20 discs on one non-conductive shaft
with 40 mages and one tiny motor, and brush wire them all in series
to get as many gains in voltage.

Man you people are everywhere.

[Magluvin]

I think that the bearings would make an excellent main shaft electrical contact to replace a brush. Even if it required more than 1 to handle it. The thought that the current going through the small contact points within the bearing races, the heat that can build up, can be negated some due to an always changing contact point.
Now it would be great if the bearing motor effect worked in a positive direction to turn the gen while acting as brushes.
I wonder if there is a 2 or 4 race bearings as in 2 to 3 rows of bearings, and how much torque it would produce. This bearing motor sounds like it needs high current, and the HP gen produces that.  The bearing I believe can be considered an official HP type except no magnet required, for motor, I cant say gen without a mag.

Ok  so lets add a mag to the bearing motor, will it generate just as it can be a motor?. If we stacked a row of 10 large bearings on a shaft then put a cylinder mag over the bearings , and the mag is magnetized inner dia N and the outer S. Will it be a more powerful bearing motor and a generator?
Then there are roller(pin) bearings.
I dont know if anyone has seen my graphite vids on YT where I remove the grease and work in graphite powder and these things spin dude. Even a dry bearing cannot compare. Not the thinnest oil.
http://www.youtube.com/watch?v=iSTfFIetYPY
We have to think that the bearing grease need be removed for good electrical contact, and the graphite fills in the gaps of the imperfect bearing surface, which lessens the resistance compared to a dry bearing to a level of magnitude. So the electrical contact will also be increased as well.
So we consider a copper or aluminum tube that slides over the outer row of bearings on a shaft and an extended portion can have a large bearing slid onto that, to act like a brush for the outer contact, And the big bearing will act as a motor also.  lol this is just silly

Mags

Lot of things to think about. 

[Foggy-Notion]

Shaft bearings as brushes sounds interesting,
not sure I understood the outer brush idea but it's late.
Any heat can be handled with electrostatic cooling if need be.

[gravityblock]

Well, if the bearings are metal and on the conductive copper shaft,
then the bearings are technically part of the circuit, no?
That is current is flowing through the shaft,
it will also flow through the bearings,
charged balls will be turing.

Not if there is a non-conductive insulator between the conductive bearings and conductive shaft.  That is the reason why I gave you both examples.

But if magnets spin with the disc, "counter torque" is minimal, if any.
And why would I want to use neodymium (conductive) magnets?
Are we making a magnetic brake, the opposite of what we want?
Ferrite Magnets are the correct magnets for N-Machines.

There is counter torque when the disc and magnet spin together when drawing current off the disc.  I once thought as you do.  Build it and find out for yourself or use ampere's old force law to do the calculations.  The conductive coating on the neo magnets is the same as having a conductive disc and magnet rotating together on the same axle.  You say the disc and magnet has minimal to no counter torque when they rotate together and then go and say the conductive neo's would be a magnetic brake (that is a big contradiction in your statement).  The strongest and biggest magnet you can find is the correct magnet.  If you don't want to use the conductive coating on the neo's, then put a thin insulating material between the coating of the neo magnet and disc.  A thicker disc would be better than the thin conductive coating on the neo, especially since we're talking about drawing high amps.

"There are other ways to increase the voltage but they are a little more complicated."

Oh?  But not a one word helpful hint?  Not even a link eh? 

Well I think I'll just spin 20 discs on one non-conductive shaft
with 40 mages and one tiny motor, and brush wire them all in series
to get as many gains in voltage.

Man you people are everywhere.

It would be an engineering nightmare with extreme losses to connect all of those discs in series to gain voltage on one shaft if it's not done properly.  Yes, it's easy to connect them in parralel to increase the amps but it's not so easy to connect them in series without the proper setup. You can always use slip rings to extract the current on the axis instead of using the bearings.  Brushes can be totally eliminated on the rim with the right set up by using slip rings to extract the current from each side of the axis.  Please don't tell me it can't be done.  It can be done with the correct setup.

Here are the links to the more complicated methods to increase the voltage without an engineering nightmare.  Just remember, when you increase the voltage you also increase the counter torque by the same ratio when drawing current from the disc.

http://www.overunity.com/index.php?topic=8409.0
http://www.overunity.com/index.php?topic=5662.msg205207#msg205207

You can do it with a halbach array also, http://www.overunity.com/index.php?topic=8409.msg213451#msg213451 

Use the search feature of this forum for more ideas.  Don't let any tools go to waste.


GB