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[CLaNZeR]

@CLaNZeR,

I got to thinking today, while revising the opening review at PESWiki.

If I were you, seeing how you've had such a hard time getting the spec magnets to work, I'd go back to your interim set-up as shown at http://www.youtube.com/watch?v=vZPI5BwccsA and try to optimize that set-up.

I think that was a weight issue with the stator magnets even though they were weaker field as such. I have found by adding weight to the correct stators I am now seeing spikes when latching and also can get it too latch very easly.

Will drop back to those Stator magnets and do some tests though.

Cheers

Sean.

[Omnibus]

@CLaNZeR,

Are the stator magnets of your motor of the same strength as the rotor ones?

[CLaNZeR]

If you recall, in Al's video, after he sync's the one stator AGW, soon after, he stops, by hand the other two stators.  Okay, now, if you watch the two stopped stators, when Al removes his hands, they DO NOT start to respin on their own.

Hi Bruce

Cannot remember which Video now , but in one of them I demonstrate that the magnets loose interaction at certain RPM's and as the Rotor slows down again they start to interact. I think at about 800 RPM the AGW actually lost it as well.

This shows that AL's Rotor was definatley speeding up in his video for this to happen.
How it was speeding up is another question LOL

Cheers

Sean.

[Omnibus]

It doesn't seem that the latching (setting the unique stator to spin AGW). Something else is getting in the way, the improper field strength ratio, the improper form of the fields etc.

[CLaNZeR]

@CLaNZeR,

Are the stator magnets of your motor of the same strength as the rotor ones?

Craigy sent them to me, I think he sussed out what N ratiing they were in this thread somewhere.

[vipond50]

Good morning, All,

Last night, at about 2am, I realized a simple test, based on Al's video, to determine if our rotor magnets are close to matching Al's.

If you recall, in Al's video, after he sync's the one stator AGW, soon after, he stops, by hand the other two stators.  Okay, now, if you watch the two stopped stators, when Al removes his hands, they DO NOT start to respin on their own.

TEST:
My test is this, to all replicators.  Spin up your rotor by hand, and then manually stop the two identical stators, with your hand, and then let go.  Does your stopped stator's begin to respin??  If yes, the rotor magnets are stronger than Al's!!    

Please post your results and magnet strength of rotor magnets.

Cheers,
Bruce

EDIT:
I have already done this test, on my "toy".  And they did not like being stopped, at all, and immediatly began to respin!!

Hi Bruce
Just did your little test. I have two 1/4" long N42 mags/ slot.
The other two Stators that are stopped just set there and wiggle back and forth very so slightly while the one Stator is in sync.

Regards
Bill

BTW- after re-looking at the Pic's and working them with AutoCad i thinks the Rotor Dimensions need to be reviewed.

[CLaNZeR]

Wow did Al actually consent to that?? Awesome

Not sure. Someone proposed that and I found it a good idea. Wonder what @CLaNZeR thinks about it.

Na AL got his own, he not having mine LOL 

[Omnibus]

If you recall, in Al's video, after he sync's the one stator AGW, soon after, he stops, by hand the other two stators.  Okay, now, if you watch the two stopped stators, when Al removes his hands, they DO NOT start to respin on their own.

Hi Bruce

Cannot remember which Video now , but in one of them I demonstrate that the magnets loose interaction at certain RPM's and as the Rotor slows down again they start to interact. I think at about 800 RPM the AGW actually lost it as well.

This shows that AL's Rotor was definatley speeding up in his video for this to happen.
How it was speeding up is another question LOL

Cheers

Sean.

I've observed a similar effect with the rig that has the recommended rectangular magnets. Like I said, I'll study that later. I think what's important now is to figure out the self-sustainment with the replicas of the original.

[blue_energy]

Hope this might be of help
I used my sound card and constructed a transducer consisting of a ferrite core and around 20 turns of copper wire, the measurement is taken approximately 1 inch from the stator while I maintained AGW lock by spinning the rotor manually.
What your seeing is 2 cycles of the stator.
http://cosmopod.com/mysite/barefm/op/stator2cycles.jpg

!
!
!  O   []
!
!

Exclamations represent rotor edge.
"O" represents stator
[] represents transducer

And here is a 28 second audio sample
http://cosmopod.com/mysite/barefm/op/statorwave.rar

Hi Running Bare,

In your 28 second audio sample - did you manually accelerate the rotor during the sample capture?  The reason I ask is that, in the middle of the run, there is a slight acceleration of the stator that occurs.

Blue Energy

[RunningBare]

Hi Running Bare,

In your 28 second audio sample - did you manually accelerate the rotor during the sample capture?  The reason I ask is that, in the middle of the run, there is a slight acceleration of the stator that occurs.

Blue Energy

I used my hand to keep the rotor spinning, so yes you will notice variations in speed and acceleration, presently I'm trying to figure out a way to attach a small motor I have to the rotor

[DA]

Busy day as usual this end.

Have posted First New Tacho results and movie link so you can see the latching occur.

http://overunity.org.uk/forum/index.php?topic=71.0

Sorry cannot be bothered to type it all again LOL
Cheers

Sean.

What is the spike at about 400 rpm?

DA

[PolyMatrix]

Thought: For it to keep going at top speed the stator 'push' should match the fricitional slowing of the main wheel. So it would latch, push, skip(s), latch, push, etc.

Because at different speeds and considering the friction and moment of inertia, there will be either magnetic drag or magnetic push. At the chaos point exactly mid point of the bar magnet the smallest of movements increases the speed of the stator magnet. It now becomes a question of timing between when the next bar magnet meets up with the stator and by how much the angular momentum is slowed by the onrushing bar magnet.

The key has to be the ratio of weight and magnetic strength.

Sorry just fascinated and thinking at keyboard.

[Omnibus]

@PolyMatrix,

Not a bad rumination. It appears that for the given rotor weight (most of us are trying to build very close replicas of the original) the most important factor is the ratio between the rotor and stator field strength as well as the proper form of the fields.

[ken_nyus]

Hope this might be of help
I used my sound card and constructed a transducer consisting of a ferrite core and around 20 turns of copper wire, the measurement is taken approximately 1 inch from the stator while I maintained AGW lock by spinning the rotor manually.
What your seeing is 2 cycles of the stator.
http://cosmopod.com/mysite/barefm/op/stator2cycles.jpg

!
!
!  O   []
!
!

Exclamations represent rotor edge.
"O" represents stator
[] represents transducer

And here is a 28 second audio sample
http://cosmopod.com/mysite/barefm/op/statorwave.rar

Hey RB,

Al's scope readings show a pretty symmetrical curve, almost a saw-wave.

Are you measuring something different?

I have very little idea on how to interpret properly either measurement, but why do they not agree?

[Omnibus]

Here are the magnetic induction values in kgauss of my current cylindrical rotor magnets measured at the same place on the surface of each magnet:

4.64     -4.54
4.68     -4.50
4.60     -4.48
4.70     -4.48
4.50     -4.45
4.70     -4.57
4.67     -4.58
4.66     -4.44

Can't measure the stator magnets because it's hard to get them out of their encasements. Wonder what @alsetalokin's data from the same measurement might be. Also, it's interesting if someone else could post such data.