Gearless Magnetic Transmission - You Can't Break These Gears
2,300,523
Published 2023-07-22
Unlike my previous radial-flux magnetic gearbox, in this axial-flux gearless magnetic gearbox, the interaction of permanent magnets takes place in an axial parallel way, not in the radial direction. And the main reason for designing this axial flux version was the thought that I could achieve tighter tolerances with 3D printed parts than the radial one, so by modifying the modulator or reducing the air gap between the magnets, I was able to significantly increase the torque capacity of this axial flux contactless magnetic gearbox.
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All Comments (21)
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Interesting fact: neodymium magnets are not indestructible, the heat generated in the eddy curent destroys them
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If you wish to avoid the frictional heating of the rotor bearings, you can use two nested bearings. in theory the bearing with less mechanical advantage will be driven faster than the other bearing, but if the two bearings are magnetically geared together in a two to one ratio, then the load is equally shared, and the theoretical top speed is doubled, before the bearings become too hot.
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If you place a high permeability metal on the outside faces to couple the magnets together you should be able to almost double the flux inside the gearbox. Inspect how cabinet door latches or speaker voice coil magnets are arranged with metal plates to focus the magnetic flux.
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The way that you made the magnetic gear reduction is GENIUS!
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If you add thin steel behind each magnet, you can nearly double the pull strength. This is an awesome video btw!!
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You should use self tightening nuts, that way the vibration will not unscrew the tightening screws. Great video.
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This concept was actually built in 1918 it was sold as the transmission you didn't need to shift, Stahl auto museum has one in Michigan
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Of all the magnetic gearbox videos on youtube, this is one of them!
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Some audio feedback: Your voice has a stronger low-end than its high-end, but you articulate your words with mainly the high-end, this makes for a more difficult listening experience. I suggest an EQ to cut the low mids, boost the high mids and maybe also play around with the highs to make it sound less nasal. If this is also how you sound without a mic, you might to play with how/where you articulate your words to better engage live audiences. That's all, I hope it's helpful!
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Brilliant!
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Did anyone else see the nuts cycle through loosening then tightening over & over? Would love to see the forces pulsating back & forth to do that. Great vid & love the outside box thinking. Cheers.
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Very neat idea for low torque applications. There is a limit to how strong this can be with permanent magnets.
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Excellent work as expected! Keep it up and thanks for sharing!
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Absolutely wonderful. Very methodically done
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There is not so much friction, but I bet there's hysteresis and eddy current loss, especially when the drivetrain is loaded. I'd love to see a quantitative comparison between a gearbox.
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This absolutely so cool and amazing, please keep going with this concept. I love it so much. I wanna see this used in car or other applications.
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Awesome investigation of magnetic forces!
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I was playing with this idea 40 years ago, glad you made it right , you got it is just a mater of the right metal to mass produce, congratulations.
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very generous and open heart in your patience and your delivery. refreshing scientist-tinkerer channel. and you saved the best for very last.
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Great job as a retired mechanic I love the way you approach gear reduction
