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Author Topic: All Permanent Magnet Motor  (Read 33066 times)

Offline synchro1

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Re: All Permanent Magnet Motor
« Reply #135 on: April 30, 2020, 02:09:07 PM »
@Magnetman,


Please upload the latest test video.

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Re: All Permanent Magnet Motor
« Reply #135 on: April 30, 2020, 02:09:07 PM »

Offline magnetman12003

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Re: All Permanent Magnet Motor
« Reply #136 on: April 30, 2020, 10:48:47 PM »
Magnetman, this is pretty complicated and will likely not be replicated. Furthermore if it works, then likely only with a certain magnets, every detail in that setup matters.

Your upper ring magnet floats freely on the lower one?

If so, interesting is, if we made these ring magnets a slightly cone shape, were it then a completely friction free bearing?


You can use a 12 oz tall inexpensive plastic drinking glass for the 2 inch pvc pipe and cement it onto the plastic block under it.   Yes the large ring magnets repell each other and very little friction is the result in the top magnet spin on a simple bearing.  It free floats.

Offline magnetman12003

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Re: All Permanent Magnet Motor
« Reply #137 on: April 30, 2020, 11:13:01 PM »
Here is a video of my setup turning without the pvc pipe. I used the plastic tube with two rod
Magnets inside it. I am waiting for some tall plastic drinking glasses to put the rod magnet tubes inside.
As you can see it turns by almost touching the rod magnet tube anywhere near the block the drinking glass will be cemented to.    Polarity as shown on my diagram.      Tom

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Re: All Permanent Magnet Motor
« Reply #137 on: April 30, 2020, 11:13:01 PM »
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Offline synchro1

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Re: All Permanent Magnet Motor
« Reply #138 on: April 30, 2020, 11:30:11 PM »
Here is a video of my setup turning without the pvc pipe. I used the plastic tube with two rod
Magnets inside it. I am waiting for some tall plastic drinking glasses to put the rod magnet tubes inside.
As you can see it turns by almost touching the rod magnet tube anywhere near the block the drinking glass will be cemented to.    Polarity as shown on my diagram.      Tom


Just sticking disc magnets to the side rim of the upper disc would generate the same repulsion!

Offline magnetman12003

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Re: All Permanent Magnet Motor
« Reply #139 on: April 30, 2020, 11:44:09 PM »

Just sticking disc magnets to the side rim of the upper disc would generate the same repulsion!


I used two large ring magnets and a total of 8 rod magnets will be used.  What’s with the “”disc” magnets?  Show how?

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Re: All Permanent Magnet Motor
« Reply #139 on: April 30, 2020, 11:44:09 PM »
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Offline synchro1

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Re: All Permanent Magnet Motor
« Reply #140 on: May 01, 2020, 12:28:12 AM »
Like this; I can wave a magnet stack and get propulsion with this spoke arrangement.

Offline synchro1

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Re: All Permanent Magnet Motor
« Reply #141 on: May 01, 2020, 02:13:56 PM »
The magnet spokes are programmed ceramics. This top ring spins frictionless with no cogging.

The poles once aligned can be powered from the under side at 45 degrees by a pulse coil.

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Re: All Permanent Magnet Motor
« Reply #141 on: May 01, 2020, 02:13:56 PM »
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Offline synchro1

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Re: All Permanent Magnet Motor
« Reply #142 on: May 01, 2020, 02:42:50 PM »
The pulse coil would need to look like this at 45 degrees; A bit awkward, but the position delivers a "Quick and Dirty" high speed frictionless bearing. All it needs is a rubber band to press the magnet spokes in place.

Offline Magwood

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Re: All Permanent Magnet Motor
« Reply #143 on: May 02, 2020, 02:23:51 PM »
Great work guys. I started my setup tonight and it spins very nice so far. I must admit I spent too long out in the freezing shed tonight playing with magnets. Good excuse to my cnc and disc sander circle jig.  :) If it doesn't work out I'll use parts for a wind generator.

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Re: All Permanent Magnet Motor
« Reply #143 on: May 02, 2020, 02:23:51 PM »
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Offline Airstriker

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Re: All Permanent Magnet Motor
« Reply #144 on: May 03, 2020, 07:09:28 PM »
You should use only non-magnetic materials for shaft, bearings and angles. Using ordinary ball bearings won't work - the balls will get magnetised and introduce pretty much "friction". Ferromagnetic shaft/bearings/angles It will also route the magnetic field where you don't want it to go.

Offline Magwood

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Re: All Permanent Magnet Motor
« Reply #145 on: May 03, 2020, 09:13:03 PM »
Thanks yes I wondered about that. I'll change it, that's the only metal, I'm using a 6mn dowel as the shaft. Will make a hardwood bearing instead and lubricate with camila oil. Or do you think brass would be ok?

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Re: All Permanent Magnet Motor
« Reply #145 on: May 03, 2020, 09:13:03 PM »
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Offline synchro1

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Re: All Permanent Magnet Motor
« Reply #146 on: May 03, 2020, 10:41:25 PM »
Thanks yes I wondered about that. I'll change it, that's the only metal, I'm using a 6mn dowel as the shaft. Will make a hardwood bearing instead and lubricate with camila oil. Or do you think brass would be ok?


Brass is O.K. Ceramic bearings are hard to beat!

Offline magnetman12003

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Re: All Permanent Magnet Motor
« Reply #147 on: May 08, 2020, 09:58:33 PM »
Here is my latest drawing of what I found that works.  I already experimented and it does. Making it after some nice tumblers arrive.
The steel rod with enough weight on it will push the 45 magnetic block in in my case counter clockwise.  Magnet attracts steel rod at angle. Can go clockwise also by reversing the image as shown. All this is free open source information by me.    All you need now is two huge ring magnets Or one huge ring magnet with a lazy Susan turntable under it.  As well as 4 powerful block magnets to make it   No other magnets required.
Other parts needed can be purchased through EBay or McMaster Carr. 
Tom

Offline Thaelin

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Re: All Permanent Magnet Motor
« Reply #148 on: May 09, 2020, 02:11:15 AM »
Tried twice to post a couple of pics but all I get is a blank screen after it says it up loaded them. Checking from separate screen shows it did not upload or even post. Still printing the mag tubes to mount at 90 degrees. Another 7 hours for that. Think I will be short fillament so have to get that to end it.

Offline conradelektro

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Re: All Permanent Magnet Motor
« Reply #149 on: May 09, 2020, 10:57:17 AM »
So far I have not achieved any continuous rotation so perhaps the sizing is very important to your design but there also seems to be a sticky point to my build which possibly might mean weak or uneven magnet rings?
All pieces printed for the magnet holders were at 45 degrees.

https://www.youtube.com/watch?v=DF1ltIug60w

Nice build!

I suspect that magnetman12003 has solved the friction problem (and the sticky point hurdle) a bit better, therefore his contraption will turn a bit longer after an initial push.

Nevertheless, an interesting idea.

Greetings, Conrad

 

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