Latest: No back torque generator.

[gravityblock]

@Yucca:

I want to know what the polarity is between the axis and rim on the north pole side of the magnet and the south pole side of the magnet.

If the axis on the north pole side is negative, then the rim on the north pole side should be positive or vice versa.  Now check the south pole side between the axis and rim and take note of the polarity.

If the axis on both sides have the same polarity, then the rim on both sides should have the same polarity.  If this is the case then BWS is correct with running the circumference of the disk or magnet in series.  This means we would need to use a N/N, S/S, or two Halbach arrays back to back in order to use a swivel bearing or slip ring on the axis and to have the circumference of the magnet in series without all the hassle.

If the axis on the north pole side has a different polarity than the axis on the south pole side, then my method will work with a N/S configuration using the swivel bearings or slip rings.  If not, then both sides of the magnet must have the same pole for my method to work.

I do not think the radial field will interfere or cause problems with the N/N configuration since the polarity will be in series across the rim.

The best and easiest way to test this is to rotate a single conductive coated magnet and test the polarities between the axis and rim on both sides of the magnet.

I will upload an illustration of the differences between BWS and my version.     

[gravityblock]

The top half of the illustration is BWS with a N/S configuration.  The arrows show how the electrons or current are flowing in the disk or magnet.  For his setup to work, the polarity must be the same on both sides of the disk, meaning if the axis is negative, then the rim must be positive on both sides.

This will help us to determine if we need to use a N/S or N/N configuration for my method.  With my method, the rim will already be connected in series due to how the polarities are on each side of the disk.  Then the swivel bearings or slip rings will allow to run the axis in series, which is much simpler and efficient. 

The bottom half is my method and shows how we need the electrons or current to flow without the hassle of connecting the circumference of the rims in series.  I will know after you perform the tests if we need to use a N/S or N/N configuration.  If the radial field is a problem with the same poles facing outwards, then we'll need to use two Halbach arrays back to back.

[gravityblock]

The swivel bearings and slip rings are basically the same.

I uploaded a video to youtube to make sure we're on the same page.

http://www.youtube.com/watch?v=cIuqPsp0Fbg


Thanks Yucca for your help and patience!

[gravityblock]

@gb,

after rereading i just realised, the above test should probably be performed with two back to back disc mags, like poles facing, with enough steel washers (same diam as mags) inbetween such that both mags just about stick to the steel. correct?

I would be interested in this test also if indeed we must use a N/N or S/S configuration.

I hope the shaft running through the disc mags don't throw the test results off because the current could flow through the disc mag to the other side and give us the wrong conclusion.

I wish I had a setup so I could test.  I have so many questions that could easily be answered.

Thanks again!

[gravityblock]

the concept is not strictly brushless, even if only axle takeoff is required then slip rings or some conductive bearing will be needed, that´s a form of brush. But of course axle takeoff would be a hell of a lot simpler to implement than brushes around the rim! plus if axle takeoff works then many units can be rotated together with just two power takeoff points for higher voltage.

Yucca.

That is the basic idea.  This is much more efficient and simplified than messing with the rim.  Either a N/S or N/N configuration should allow the current to flow from the axis to the rim, then from the rim to the other side of the axis, where we\'ll have slip rings on both sides of the axis to take the current off with increased voltage without having to mess with connecting the rim in series with a complicated brush system that needs to be saturated.

Your right in saying it\'s not strictly brushless.  I\'ve read that Halbach arrays allow for a brushless DC motor, but I doubt we could implement this in our setup since the motor would be operating on different principals.

Please let me know if I\'m misunderstanding the concept so I can correct my thinking.

Thanks,

GB