Quote from: darkwanderer on September 24, 2012, 04:13:19 AM
Does anybody have the scope shot of the drive coil ? (romero's)

Hi darkwanderer,
Do not think much on the driver side, concentrate on the generator coil which is most important...


Regards
Cc

Quote from: crazycut06 on September 24, 2012, 08:04:06 PM

Hi darkwanderer,
Do not think much on the driver side, concentrate on the generator coil which is most important...


Regards
Cc

I'm about to make my own test system. But if you have already made the system you can try the idea below. We can have the results faster.


I was thinking about the magnetic flux changes on the coils here's my last idea about it. Look the drawing in the attachment. On the left the drive side coil flux change been drawn. The right side is the generator side.


I think romero's drive coils are producing the same amount of flux when the magnet and coil is aligned each other. Unfortunately we don't have scope shot of the drive coil to prove it. When the magnets and the drive coil flux is equal each other, the force generated between the coil and the magnet is equal to the square of the flux.


Don't have idea about generator side if we can produce more energy with the flux change shown on drawing.


http://en.wikipedia.org/wiki/Force_between_magnets#Force_between_two_magnetic_poles


We are gonna need some calculations here...


By the way the drawing is not exactly the same as the flux change in real. But I hope this will give you some idea about romero's device...

My coils are easily removable, for now, because they are just air core coils fastened by plastic bolts.
Might still go back to magnetic cores later but, for now, trying to keep it simple, and cheap, and reduce Lenz effects.

With regards to shorting; I wonder if anybody has tried just shorting one, or more, conductors of the litz wire?

}:>

Quote from: Magluvin on September 23, 2012, 11:00:35 PM
Romero said that others needed more capacitance in their coils. One way is bifi. I posted that after romero's post and he verified that fact. True or not, I cannot say.

Are your coils easily removable as to change up later?  If so, good.

Some suggest that he may have had shorted coils involved as his experiments just before this motor were involved with shorting coils and increased distance from the rotor magnets.

So if after testing with what you have, try a couple turns of shorted windings on top of the existing coils to see what happens. With only few turns of shorted windings the drag should not be much as compared to shorting the larger winding with a magnet pass, but might influence the larger winding in a good way.

Just some things that I remember from back then. ;]

Good luck. Will be watching. ;]

MaGs

Hey Konehead. Thanks for the input. 

Have decided to go ahead and wind bifilar coils.
I have plenty of Litz wire and these coils are easy to wind and easy to change since they are just air coils on plastic bolts and I already have terminal strips ready for bifilar circuits.
And, yes, the bolts are sticking out and do not plan to use any bias (backing) magnets at this time.
For now, just keeping it simple and cheap.

But still might go back to magnetic cores, as I had in the earlier build, some time in the future.
Might also try a different rotor, or stator, with same number of magnets to coils as found on the QC motor-generator which, also, just uses air cores in that design.
And if I had that kind of money to spend on an experimental device I would buy one.

And, BTW, the manufacturer (www.quantamagnetics.com) does sell the coil bobbins separately which do appear to be a custom part, with "quanta magnetics" and "Made in the USA" printed on it.
And is about the size of a VHS tape spool (3" diameter X .75" thick with 1" hub and .375" mounting hole) ready for a plastic bolt and nut. (see image)

And, yeah, lots of variables.
I would also love to find 1/4" diameter ferrite, or better, cores that are around 1" long that I might be able to just stick in the holes where the plastic bolts currently are.
As it is; I might also just try iron cores or even just steel bolts in place of the plastic bolts. At which point I could try some different things with bias magnets.
Many . . .Many variables. . .

}:>

Quote from: konehead on September 24, 2012, 12:26:15 AM
Hi Scorch
It looks good so far -
It is good idea to have multifilar winds since you can run them in paralell or series later on to adjust your impedance (and "capacitance" of coil) and also the voltage out and amps out from your coils after you get it going......
Also it looks like the bolts sticking out the back of your stator plate are going to get in the way of the where the backing magnets will position best. 
You will probably have to use ring-type magnets for your backing magnets that go around those bolts so they sit right behind the stator cores....this is what I had to do in my first Romeor-variant project since I already had a lot of litz coils wound from earlier project and they were mounted with bolt and nut  through stator plate.....
However, what I learned was right behind the stator cores might not be at all where those backing magnets should be postiioned - maybe they should be 10mm or 2mm this way or that way so that you get the "speed up under loaded coils" condition happening because of how the backing-rmatnets react to the rotor magnets at certain rotor-speeds,
and strengths, (via how high of a stack of backing magnets)
and also the distance between the rotor magnets and backing magnets,
plus the distance between backing magnets stator cores,
plus finally the distance between rotor magnets and stator cores.... so there is quite a few variables right there eh  - forgot to mention a few others you will find when you start testing
....so anyways its good idea in my book to have perfecly flat surface on the back of  your stator plate so the backimg magnets can go anywhere they need to go....
anyways good luck have some fun with it,...

Quote from: darkwanderer on September 25, 2012, 02:18:38 AM

I'm about to make my own test system. But if you have already made the system you can try the idea below. We can have the results faster.


I was thinking about the magnetic flux changes on the coils here's my last idea about it. Look the drawing in the attachment. On the left the drive side coil flux change been drawn. The right side is the generator side.


I think romero's drive coils are producing the same amount of flux when the magnet and coil is aligned each other. Unfortunately we don't have scope shot of the drive coil to prove it. When the magnets and the drive coil flux is equal each other, the force generated between the coil and the magnet is equal to the square of the flux.


Don't have idea about generator side if we can produce more energy with the flux change shown on drawing.


http://en.wikipedia.org/wiki/Force_between_magnets#Force_between_two_magnetic_poles


We are gonna need some calculations here...


By the way the drawing is not exactly the same as the flux change in real. But I hope this will give you some idea about romero's device...

Do you mean that the flux generated by the drive coil has the same force (or greater) taken by or generated by the gen. Coil? Hmmm...? Does it explain the no drag on gen coils when loaded? 


Regards
Cc