TD replications

[gotoluc]

The difficulty with a pendulum is the same magnet orientation
passes over again on each  back swing.

I think the pendulum arc could be long enough to accommodate 2 magnets (one of each pole)


Video demo: https://www.youtube.com/watch?v=xqaf9a9hJAg

When using big ceramic magnets, you might still be able to use
a bicycle rim if you support it with 4 rolling bearings / wheels 
2 on each side, near to where it passes over the stationary magnet.

Yes

If you have any thing specific you would like to run by  me
fell free to pm me.
........................................
Your latest device kicks a___!

                regards
                   floor

Thanks for the support and glad you enjoy the new design

I'm contemplating on a series (cascade effect) for the next build.
If there is a gain, it should be obvious then

Regards

Luc

[Floor]

@Gotoluc

I think the pendulum arc could be long enough to accommodate 2 magnets (one of each pole)

I didn't see it clearly.

Now I got it. Thanks for the short and sweet video.

[Floor]

@Gotoluc

Some observations.

When the approach of the rotating magnet is very precisely
at right angles (in all planes) to the sliding magnet....
there is practically no work done against magnetic forces...
for rotator to approach / exit.
................................................
Even the very slight off angle / changing angle ....of  approach by the rotating
magnet (which is due to the curvature of the bicycle rim) is having a significant
effect.

Using longer magnets will,  increase the work input, more than
one might expect due to this feature.  (longer magnets will have a more dramatic
change in distance from / angle to .... the sliding magnet... at a given curvature of
their approach line  (I think)....
.....................................................
The greater the diameter of the rotating rim.... the more nearly,
the rotating magnet's approach to the sliding magnet....
comes toward being a straight on / 180 degree (2 x 90 degree) approach.

There will be a diminishing return in the benefits of a longer pendulum
(from pivot point to magnets).  At some particular length, any further increase
in length... will give almost no decrease in the force needed to approach
/ escape.

The more perfect the alignments the more nearly one will approach
a zero for the input.  There is a limit... even the magnets / their fields are
not be perfect.

Also, at close proximity "magnetic domain flipping" within the  magnets
might have some undesirable effect. ..... But when 2 magnetic poles approach
2 other magnetic poles... these effect might completely self cancel.


         regards
              floor

[gotoluc]

@Gotoluc
Some observations.

When the approach of the rotating magnet is very precisely
at right angles (in all planes) to the sliding magnet....
there is practically no work done against magnetic forces...
for rotator to approach / exit.
................................................
Even the very slight off angle / changing angle ....of  approach by the rotating
magnet (which is due to the curvature of the bicycle rim) is having a significant
effect.

Using longer magnets will,  increase the work input, more than
one might expect due to this feature.  (longer magnets will have a more dramatic
change in distance from / angle to .... the sliding magnet... at a given curvature of
their approach line  (I think)....
.....................................................
The greater the diameter of the rotating rim.... the more nearly,
the rotating magnet's approach to the sliding magnet....
comes toward being a straight on / 180 degree (2 x 90 degree) approach.

Yes, I'm aware of these problems and why I was thinking of using a Pendulum instead of the wheel.

There will be a diminishing return in the benefits of a longer pendulum
(from pivot point to magnets).  At some particular length, any further increase
in length... will give almost no decrease in the force needed to approach
/ escape.

The more perfect the alignments the more nearly one will approach
a zero for the input.  There is a limit... even the magnets / their fields are
not be perfect.

Also, at close proximity "magnetic domain flipping" within the  magnets
might have some undesirable effect. ..... But when 2 magnetic poles approach
2 other magnetic poles... these effect might completely self cancel.

Today I was reconsidering the use of a Pendulum because of the long ark needed to keep the magnet gap small.
I concluded to just use a sliding bearing for the 2 alternating magnets. This way both input and output are linear motions which should make it simpler to loop.

Thanks for all your considerations and sharing.

Luc

[gotoluc]

@Gotoluc

I didn't see it clearly.

Now I got it. Thanks for the short and sweet video.

That's why I make videos and encourage everyone to make them, as in seconds one can understand what may take many posts or even pages to describe.


Luc