Who knows, might learn him about back emf 
.. Tell him hold this and spin it up with a drill.... Nah, dont do that.
.. Tell him hold this and spin it up with a drill.... Nah, dont do that.
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The motor your talking about has been experimented for years. It's called a Magnetic Motor, Google that and you'll find all kinds of tries at it. Some claim success, but bottom line, no commercialization and no sales. More importantly, no independent verification of stated success. I imaged this when I was 8, and spent a ummer dicking around with magnets on a small brushed hobby motor. Seems plausible, but I got nowhere on it!Comment
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The only way this would be feasible would be if your "coil" magnets were literally magnetic wire. The coils (turns) in a winding is what creates the magnetic field that is used as a repulsing force on the stator magnets.
Now let's say that you were able to get this far. The magnetic field from the coils without power is not an additional source of resistance. Now you would have to overcome that ever present field before you can even think about turning the stator.
By my logic, it would only be possible on a low speed high torque application. "But you just said it wouldn't???" If you could have the winding extend and retract into/from the stator magnet's (singular) field at the right time, you would essentially have an electric....errr....gas engine. Think valves on a fuel engine. This would require either some really fast and precise digital hardware, or a very precise cam shaft setup. This would also increase the weight and physical dimensions drastically. You will also lose a little efficiency due to not being able to contain the total magnetic efflux (I feel like efflux is t the right word) as well.
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And I'll further elaborate on the first paragraph as to why the coils create the field. As electrons flow, they naturally create a magnetic field. That's why we put our positive and negative wires together. It neutralizes "radio interference" by canceling itself out. To really get the grasp of this, all you have to do is look up the right hand rule.
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Where it could get interesting is if you build a can big enough to stick magnets on the inside of the can, then build a stator with windings to stick to the inside of the magnets that sticks to the can. Then you have your rotor in the center of everything.
The magnets which sticks to the can should strength the magnetic field on the stator, and the stator would be able to make the motor functional.
This is should be able to make the experiment a reality.
The performance of this motor I would like to see.Comment
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I went over that exact same thing in my post above.
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I think also the magnets on the can, would have to be placed in a way that repelling the rotor would be would happen easily.
The number of magnets would be in accordance to the number of slots in the stator.Comment
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Still not a reality.
Nortavlag Bulc Comment
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The only way I see getting a speed control for this is if you introduce another magnet to interfere with the field creating the motion. Maybe one day.... Nortavlag Bulc Comment
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For the longest time there was a video I had save on YouTube that had a guy that made a perpetual motion wheel that was powering itself using the BACK EMF energy from a pair of massive coils he created. Too bad I suck at capturing videos from on line otherwise I would have it archived to show you. Wonder why the video is gone? It was very cool and somewhat crude.
Originally posted by boredom.is.me View Post Nortavlag Bulc Comment
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Actually, that motor is a reality! But it has one serious flaw: the magnets de-gauss rather quickly, and they get hot. So it's NOT a perpetual motion machine, it uses magnets as fuel. It's too expensive to replace the magnets, so the market feasibility of this just isn't there. They lost their primary investors once they realized that the magnets go kaput quickly...Comment
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