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  • BroMikey
    replied
    Originally posted by Turion View Post
    Look at the output on the coils in this video. He has no shielding around his coils.
    https://www.youtube.com/watch?v=kfRxsC9yumQ&t=4s

    And the simplest thing to do to test that idea would to remove every other magnet, so I would be left with 10 on the rotor instead of twenty. That would remove the existing 10 of the same polarity, since they are in a N/S configuration right now and I would be taking out either all the N or all the S if I took out every other one. Once those 10 are removed, I would have to then remove every other one (of the 10 left) and reverse them so that the remaining magnets were all N/S. I may get to that point, but not there yet. Even if I get down to 10 on the rotor, that's four MORE than I had with the original rotor, and that rotor put out 130+ volts per coil.
    What are the rings then? Look closer


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  • Turion
    replied
    Look at the output on the coils in this video. He has no shielding around his coils.
    https://www.youtube.com/watch?v=kfRxsC9yumQ&t=4s

    And the simplest thing to do to test that idea would to remove every other magnet, so I would be left with 10 on the rotor instead of twenty. That would remove the existing 10 of the same polarity, since they are in a N/S configuration right now and I would be taking out either all the N or all the S if I took out every other one. Once those 10 are removed, I would have to then remove every other one (of the 10 left) and reverse them so that the remaining magnets were all N/S. I may get to that point, but not there yet. Even if I get down to 10 on the rotor, that's four MORE than I had with the original rotor, and that rotor put out 130+ volts per coil.
    Last edited by Turion; 06-21-2022, 09:37 PM.

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  • BroMikey
    replied
    Here is the classic illustration of adjacent magnetic fields overlapping and how the lines of force tank out. Your magnets are aligned in this way only closer. Do you understand now? Your findings support text book models.

    Last edited by BroMikey; 06-21-2022, 06:38 PM.

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  • BroMikey
    replied
    Poor man's machine shop using indicators. Close enough for horseshoes. Centering and gap adjustment.

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  • BroMikey
    replied
    Jordan's little machine shielding

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  • BroMikey
    replied
    And yet another build where magnets are crammed together tightly. What do you see?

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  • BroMikey
    replied
    Here is another example of the need for shielding on a dual rotor model. The fields this close together must be controlled and pushed of in front.

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  • BroMikey
    replied
    Thanes magnet shields when magnets are so close together the fields overlap.

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  • BroMikey
    replied
    https://www.kjmagnetics.com/proddetail.asp?prod=DEX0

    this link should help

    This is why you get more from the tiny test rotors, due to their distance apart no shielding is needed.
    To test this theory you could use a 7/8" magnet with a thin sleeve to bring it to 1" but if you do that make the 1/16" sleeve shorter than the full length of the magnet. My test show best results 50-70% leaving the magnet exposed on the very end

    EDIT

    Cut this sleeve to length and press them together with glue. All you need is a hacksaw and a way to hold it without damaging during cuts

    https://www.ebay.com/itm/12464476600...oAAOxy4t1SiQiK
    Last edited by BroMikey; 06-21-2022, 05:08 AM.

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  • BroMikey
    replied
    What might be happening with no voltage off the big rotor is that the coils see 1 big magnet because your rotor is plastic where other rotors with this design but magnets are set into metal. The metal causes a compression and a separation between magnets so close. A distinction between N and S magnet poles is important. I think shielding in this case might solve the bleeding fields.

    This is why you get more from the tiny test rotors, due to their distance apart no shielding is needed.
    To test this theory you could use a 7/8" magnet with a thin sleeve to bring it to 1" but if you do that make the 1/16" sleeve shorter than the full length of the magnet. My test show best results 50-70% leaving the magnet exposed on the very end

    Last edited by BroMikey; 06-21-2022, 04:54 AM.

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  • Turion
    replied
    Yeah, when you go from the 2" magnets down to the 1" magnets, there is a big difference in the distance of the outside edge of the magnet from the center of the rotor, So it's kind of an optical illusion, but the distance from center of rotor to CENTER of all the different magnets I have used has always been the same. My test yesterday showed almost NO voltage output from my coil, so I don't know what the heck is going on. Even LESS voltage that the 3/4 x 3/4 diameter magnets I had previously. Haven't been able to get back to it. Hopefully tomorrow, but another issue is it is very LOUD which it wasn't before, and my shop is too close to my wife's office where she works from home for me to run it while she's working, so have to roll it outside to even run it.

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  • BroMikey
    replied
    Okay my mistake cause it is so big that the inside ream of 1" magnets looks small to me. I think the rotor you sent me was overall 12" in dia but with space to keep the magnets in plus taking off 1" to find center put you at a 10.5" dia at the center point. So you just said this new rotor has a 10.5" dia center.

    Very interesting indeed, goodness that is a 16" rotor that you have now by the looks of it. That's my best guess. Thank Dave for filling in the data gaps. You probably told us before but I forgot.

    With this new design you should have a much higher COP but we can't be sure with those experimental core you may have to change or put the old ones in there for 5 min to see what's failing.


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  • Turion
    replied
    Center of rotor to center of coil is exactly the same as the old machine. Every machine I have built for the last ten years has had the exact same distance from center of rotor to center of coil, and hence they are all the "same" from center of rotor to center of magnet. Therefore speed of the magnet "passing the coil" at the same RPM of the rotor has ALWAYS been the same. Only the diameter of magnets has changed, so the TIME the coil is exposed to the magnet has changed. Some magnets were 2" diameter. Some were 1" diameter. Some were 3/4" diameter. There have been changes to the NUMBER of magnets on the rotor, so how many magnets passed the coil per rotation or per second at a given RPM has changed. The thickness of the rotor also changed. I started with 1/4" thick rotor and 1/4" thick magnets,. The last rotor was 1 3/4" thick. The present one is 1" thick. I have also changed the diameter of the rotor so that a circle of extra "opposition magnets" could be placed farther out on the rotor to interact with magnets on the stator. This required a much larger rotor and a larger stator.

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  • BroMikey
    replied
    Originally posted by BroMikey View Post
    Hello Mr Dave

    This new one has a 8" to center dia?
    I'll take that as a yes? I am here to make a statement about the old magnets and how you fudged the last set of magnets thinking it is all the same thing. Also your old rotor is here in my possession so I have the average center to center dia and have run the calculations before the entire group a couple of times.

    Good common horse sense says you do not have the same dia as the old one so therefore you can not expect speed up or voltages to be close.

















    Last edited by BroMikey; 06-19-2022, 09:37 PM.

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  • Turion
    replied
    I don't give a rat's ass. Don't have any rat's asses to give. Got rid of my last rat's ass years ago. I'm into horses' asses now. Did some testing today, but getting really WEIRD results. Not posting anything (video) until I figure out what is going on.That could be YEARS! LOL

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