This is where boundaries are pushed. Micro electronics, 3d printers and other now accessible tools make it possible for geniuses to be geniuses. Well done.
@@jamesmelemede5610 hey, while it might be useless it's more of an experiment not a product to be sold. I like TH-cam how it is because TH-camrs can make things that are not optimized for profit yet still get money it incentivizes interesting content and doesn't constrict you in doing things only for profit. Like man gearboxes are great and all but where else you would see one made of magnets - TH-cam.
@@jamesmelemede5610 You do realise this is just a prototype right? Plus it has many advantages over a mechanical gearbox: No risk of grinding gears and potentially no need for a clutch for one. Instead of mechanical sheer forces we have to deal with overheating, which is a much easier issue to solve.
@@jamesmelemede5610 Bro, if youtuber without huge expirience knowlage, expencive tools and lab of engineers can produce this gearbox, then maybe, just maybe in perfect conditions it has a lot of potential. Or simply one specific fucking task? Can't your GRAND and intelligent brfain comprehand that????
@@jamesmelemede5610That was an unwarranted insult... This is a prototype, and it using as little of rare earth magnets isnt its purpose. A person just wanted to make a magnetic gearbox. Also isnt it quite usual for gearboxes to be bigger than the motors, especially if they need to do a massive reduction or is made out of weak materials like plastic? (Or is a prototype?)
@@karyjas1 I get ya, but that's why we can't have nice things. Be it intellectual laziness or R&D costs being so artificially high thanks to market capture, patent law, or just simple low wages very, very few people can manage to put together a prototype, the result is stagnation and learned helplessness. And it's even worse when people assume tossing around napkin math and a 9th grade grasp of physics makes them Grand Poobah on Turd Mountain. Currently dealing with the type elsewhere related to rotary valve engines.
@@custos3249Heh i watched that video myself. Hey dont worry about thinigs outside of your control, dont stress yourself. Only do when you decide to do something about it. The situation isnt great, but more negativity is likely going to make things worse. So - may you have a good day and lets hope things will improve in the future while we do our best
the slip torque of this gearbox is actually crazy. the idea to use a planetary style and everything else that went into designing this motor is pure genius. with the ability to transfer such a high torque it shows that magnetic gearboxes have far better potential than i think many people realize.
@@matthewfredrickmfkrz1934 With the exception of the bearings, there are no wear parts. Plus, an over-torque situation results in slipping instead of stripping a gear. This could seriously reduce wear and maintenance in some applications.
It is dramatically more expensive to regularly replace bearings, disassemble and relube gears, or have massive failures when gears are over torqued and strip or at worst shatter and break other parts.@@matthewfredrickmfkrz1934
I used to always point out the reasons why something will not work for real applications, but I changed the way I look at ideas now. Who knows where it will be applied in what form (full, partial or modified). Amount of preproduction work that is study, modeling, printing or machining, presentation readiness and all the unseen trial runs etc and then the whole storyboarding, production and post production work, shows his level passion on the subject. I want to see the behind the scenes now right from study, research to post production of the video....
An attempt to productize a magnetic clutch/transfer was made by MagnaDrive back in about 2000. All of this looks familiar and they had some very good systems for misaligned shafts, vibration reduction, gearing, etc. Great looking aluminum housings and led by a former Boeing CEO. But heat dissipation, reliability, and lack of performance along with decreasing capability over time led to its demise. How do I know this? I was an investor and lost a lot of money in what appeared to be a promising technology. So, as much as I like to see someone showing the journey, I know pretty much where this effort ends. The heating is due less to friction than it is to eddy currents caused by the rotating magnetic fields. Keep experimenting, but it might be useful to see what the state of the art is before engaging.
Excellent comment, but one company failing to productise can be a death-knell for a technology, at least for future private investment, simply because it will be forever assumed to be due to techical failure. There are a lot of reasons such start ups fail, and the failure alone isn't enough to prove that there was really a show stopper. Openly published research and development like this is pretty much the only way such technologies get a real chance. The other way is government funded public research, mostly aimed at determining whether it's *worth* further pursueing. This video is totally perfect in an of itself: A good attempt was made, and there was fairly significant success. This comment further raises important issues, to which I will add: Is the failure over time due to 'wearing out' the magnets? Magnets store energy, and it's usually difficult to 'drain' them when every interaction tends to go both ways. But it's not impossible, particularly if magnetic saturation and cyclic heating/movement is involved. When this is the case, it would account for gradually decreasing capability over time, but it might also be possible to engineer around that failure mode (ie, make it not a 'show stopper') so long as it is understood. Failing to understand the long-term failure mode 'in time' to work around it can certainly seem like, and even BE a show-stopper, especially for a startup. Funding runs out before the payback, and the idea dies 'on the vine'. But it might not be truely a dead-end, just a last-minute pitfall the MagnaDrive engineers just didn't see in time to avoid. Given the pressure to push the performance to its limits to either maximise return on investment, or at least ease marketing, it is fairly likely that this kind of longevity failure would result. Worse, those involved in the unsuccessful first effort, especially those 'stung' by other investment pulling out, would be likely to give great air-time to the apparent unworthiness of the technology. This is not wrong: It's important to share knowledge of hazards widely. It does suggest a good target for further research might be to actually try to reproduce the decline in performance over time, and then see if the mechanism of it can be confirmed. From this video alone, it seems safe to say the magnets themselves can easily be monitored to avoid overheating them, so that issue might not be what really caused the decrease in performance over time. So here's an alternative hypothetical mechanism: The classic way to 'drain' a permanent magnet is to exploit the Curie point: Allow magnet to do work pulling an anchor (discharge energy), then use Curie point to demagnetise the anchor, reducing the force requirements to remove the anchor, without doing work against the magnetic field (which minimises the recharging that otherwise occurs), then cool the anchor, and repeat the cycle. This results in an 'engine' that runs, at least until the magnet drains. Similar trick can be pulled by energizing an additional coil to increase the magnetic field to the point the anchor becomes saturated, whereupon the permanent magnet 'loses traction' with it. This gearbox isn't trying to be an 'engine' like this, but a similar effect could occur if anything exposed to the changing magnetic fields can behave even partially in a similar way (not necessarily Curie point, but also core saturation). A way to measure this might be a high-range magnetic flux sensor mounted in front of one of the stator array magnets. If that shows a slow downward trend, you've caught it in the act of wearing out. But it might not be the stator magnets that wear out - could also be the inner array ones. The easy way is to just keep conducting repeated efficiency and maximum slip experiments between extended power transfer runs. The way I would do that is use two brushless DC motors, and two AC variable speed drive invertors, with at least one able to regen, and both running from the same DC bus. Therefore the power goes from one to the other and back to the bus, only less losses, which saves on having to completely supply/dump the energy as with a brake. That way the power flow through the gearbox under test can be much higher than the AC outlet draw, so it can be run for a lot longer with less dissipation. Would use motors with different pole configurations to help account for the gearbox ratio difference. I'd expect it potentially possible to arrange these gearboxes so they might actually tend to 'charge' the magnets: Thus preventing the fate of getting worse over time. They'd get better, up to the point of saturating the magnets, probably at the cost of reduced efficiency. TANSTAAFL after all. The other thing that may happen, is that effects on the state of the magnets may depend on details about the load - perhaps cycling in a certain way exacerbates magnet drain, and operating differently might avoid it? Won't know without a better understanding of that mechanism. Either way, the true reward of excellent research work is... more research work!
Idea. You currently have a fixed gearbox, but what if you were able to adjust the number of poles on the fly? Say by having an inner cage and then moving it between different housings, or play around with some electromagnets. You could have not just a gearbox, but a clutch-less transmission!
Interesting idea. There's a way to 'turn off' or cancel out the magnetic field of permanent magnets, that actionlab demonstrates in one of his shorts. You might be able to use that in combination with the split torque release to change the power in the gearbox. Or like you said, by using electromagnets and varying their charge. It might even be possible just by taking advantage of its slip torque and using multiple gears, so that a stronger one engages when the weaker one reaches its maximum slip torque and so on, as a sort of automatic transmission.
Dude you are such a monster, not many viewers will understand the work, effort and knowledge that you've put in the video. Keep going like this buddy it's insane !
Ingenious design, with a lot of great improvements. You can have even more torque if the magnets in the center were mounted on a much stronger and stiffer material. The reason for this is that as you approach higher levels of torque, the material holding the magnets is starting to bend, so you lose tolerance. If you can tighten tolerances, and use stiffer materials then that will greatly improve torque. You might be able to find a ferrite bar and shape what you need instead of cutting little tiny pieces of aluminum? (worth thinking about to save labor) Great Inventiveness.
Nice work! In my bachelor thesis I constructed and build a magnetic gearbox around the same size as yours. I managed to get 60 Nm of torque out of it. One important thing is to get the magnets as close as possible to modulator. If you want i can send it to you, its in german, but google translator can help you :D
This is a brilliant experiment and concept. In the first design with the screws, maybe you could stack M3 thin washers to create a cheap laminate effect. Well done and keep up the good work. It would be interesting to see if this design could spin larger propellers on drones. :)
This video/project was *professional* , the testing and full on *production engineering* to an extent is really refreshing when some may not go to those same lengths. Really well done!
Uhm. You need to properly measure output power. 80 percent is shockingly good, but a properly scaled single ratio gearbox has low single digit losses. Nice work though, and magnets are obviously a cool source of unique properties.
I'm only part way through the video, so maybe you tested this, but I'm curious about the actual efficiency. Well made gears are quite efficient, and I wonder if induction and eddie currents will work against you just as badly as friction in a traditional gear system would. This is super cool though! It works so much better than I expected. Edit: oh, nice! You tested the efficiency! I can't wait to see what you do next.
Well done, and thanks for the efficiency testing. Seems like most magnetic gearbox's aren't very good but yours is great! You certainly put in a lot of work.
This is amazing! I wish I could get one of these with a 5:1 ratio for my tractor. Then I could use modern 540rpm CCW impliments from the 3250rpm CW power take-off shaft of my 1980s machine.
Love your work. Very impressive! I have a new project Idea as a follow up: Replace the inner rotor with the stator from an Outrunner brushless DC motor. A rotating magnetic field from the stator should be equivalent to your inner rotor. Essentially you would have a internally geared Brushless DC motor!
@@retsetman9698 Also, heat, you would have an unventilated heater inside. which would mess with the modulation amount and the magnet life span. it would be better is the exterior part was stationary, as it would be easier to cool (big surface area, lots of copper to allow easier dissipation), but electromagnet halbachs are weird tho.
@@giuseppebonatici7169i had similar thoughts of an exterior electromagnetic coil set around the outside that could be modulated in such a way as to create a potential locking effect to increase output torque with little &/or variable energy input.
I highly suggest changing your bearings to nitride boron ball bearings. Not only will they not heat up as much, the ceramic bearings wont deform due to heat cycling or extended high rpm runs like metal bearings. They also chew up any junk that gets in the bearing unlike metallic bearings. But best of all? Less rolling resistance for higher system efficiency and less parasitic loss.
The only real world application for this I know of is in space. Where moving parts must work perfectly for decades, but don't necessarily need to be powerful.
having reliable gears never fail is useful for all of future society imagine building a machine and it just werks with no maintenance, this is a huge step in that.
You could spend all those magnets on a servo itself. You could just run the "final drive" electronically directly.. Likewiise you can replace all the middle parts with wires,
This could have interesting use cases where obstruction of the mechanism by limbs is a risk factor. Like in places where people are working close to open gears or something, this could possibly used as a safty gear, that would have just enough holding force to move the shaft it needed to move, but any more resistance, like an arm or leg getting in the way, would be enough to push it past the magnets and stopping amputation. Really cool.
For a given weight (= cost/volume/size) of permanent magnets, an Hallbach array gives much LESS magnetic field than a traditional array + back iron. Commercial brushless motors always use back iron to close the magnetic circuit and never Hallback arrays.
This vid got recommended to me out of the blue. I enjoyed it. However I'm not 100% sure about it's application as this is the first vid I've seen. I am a aerospace machinist shop monkey (I make the gears that go into any jet turbine engine. Military or commercial.) so if you ever need any help with that side of things I'll be happy to help. The clicking at the end is likely due to either the amount of runout which gets exaggerated with higher RPMS or (Most likely) the thingy a doo is poorly balanced which is causing runout. And seeing how you somewhat crudely cut those aluminum spacer things I'll be willing to guess that's the main issue. Anyways I love watching these kinds of vids.
I was just learning about another way to get the benefits of laminated steel without the issues of laminating steel; at least kind of. Either way, think a bunch of iron filings or iron from the ground, picked up with a magnet, set into a binder and poured into the shape of choice. Edit: I just tested a small mix of ground iron and clear gorilla glue which upon testing with a digital multimeter showed no conductivity. The properties seem quite similar to laminated cores. I do however have reservations of the particular glue I'm using to cure in large batches. Perhaps epoxy would be a better binder; yet I have not tested that.
That's a pretty good idea, but i would include a diamagnetic filler in addition to the metal. You want it to form flux tubes and you want to trap the flux in those tubes. Otherwise you'll have the flux tubes rearrange as the surface fields change.
Do you think a minimized or megamized(?) system could be used to increase efficiency of a hand crank generator? This would be fascinating from a survival energy perspective.
@@violinviolator5841I will note that there are other ways of doing something similar. Many lathes have a system where the lowest gear ratio is coupled by ball bearings pressed by springs into divots on another gear. That way, when I do something stupid, it overcomes the spring pressure and slips instead of breaking the lathe.
@@arthurmoore9488 That's cool. I wonder what applications there are where this is specifically better suited than a mechanical design such as your lathe employs.
@@gormauslanderProbably anywhere that slip torque is expected regularly. I've seen the design for my lathe have trouble re-engaging, but it's fine since it's more like a circuit breaker than something I ever want to use. Direct drive, or near direct drive, hydraulics and electric motors could also probably slip without damage, but anything with a gearbox this has potential as compared to clutch pads.
Yeah I’d love to try it out, and maybe it would help others on their projects, been a bunch of designs being shared for Cyclodial Gearboxes, maybe this can be like that too!
i think gear teeth gearbox would deliver more torque for that enables the magnets to be inbetween eachoher... so maybe a planetary gearbox or any with interlocking teeth
This has always been on my mind because of my lathe motor drive recently blew up due to overload. But the magnetic connection must be broken before the motor draws excessive current, which means the torque capacity must be at a certain value, or an electromagnet gearbox would be great for this.
brother im interested in your work but find it hard to understand your accent, perhaps captions or a translater? bmi russian has done garage 54 voice over for years. maybe something alike? love your creativity. people like you put innovation on the market.
Awesome stuff! Have you ever looked into 3phase torque conversion? That is, 3 phase motor such as any brushless hobby motor used as an alternator to transfer energy to another motor to have non-linear torque transfer.
What I didn't say directly in the video was that the number of steel poles in the modulator is equal to the total number of magnet pole pairs. I could change the number of magnet poles with electromagnets, but then I wonder how to adjust the number of steel poles in the modulator.
Love it! Great follow up video! Nice work! What is the outer diameter of the whole assembly? From an engineering standpoint, it would be great to see what the maximum torque that could be transmitted, with the restriction of making the gearbox diameter the same as the motor (like a traditional DC motor sold on amazon with a spur gear based gearbox).
I saw in another youtube video about exposing computers to magnets that a permanent magnet can loose it's magnetic force when heated, but it can also gain it back by heating it again. I don't remember exactly what video it was, but there shouldn't be too many videos of people exposing old computers to magnets where they talk about heating them.
@@retsetman9698I remember the guy in the video specifically mentioning "popping it in the oven" as a means to re-magnetize it after de-magnetizing it to make it safe to mail without needing special packaging.
@@hellcat1988 I never thought they would demagnetize for something like this, it's really interesting. We're probably talking about the same method, by the way.
This is where boundaries are pushed. Micro electronics, 3d printers and other now accessible tools make it possible for geniuses to be geniuses. Well done.
@@jamesmelemede5610 hey, while it might be useless it's more of an experiment not a product to be sold. I like TH-cam how it is because TH-camrs can make things that are not optimized for profit yet still get money it incentivizes interesting content and doesn't constrict you in doing things only for profit. Like man gearboxes are great and all but where else you would see one made of magnets - TH-cam.
@@jamesmelemede5610 You do realise this is just a prototype right?
Plus it has many advantages over a mechanical gearbox: No risk of grinding gears and potentially no need for a clutch for one. Instead of mechanical sheer forces we have to deal with overheating, which is a much easier issue to solve.
@@jamesmelemede5610 Bro, if youtuber without huge expirience knowlage, expencive tools and lab of engineers can produce this gearbox, then maybe, just maybe in perfect conditions it has a lot of potential. Or simply one specific fucking task? Can't your GRAND and intelligent brfain comprehand that????
@jamesmelemede5610 all bro sees is black
Your big brain couldn't come up with a situation where this might be useful, leave it at that.@@jamesmelemede5610
Wish there were more of this type of content on youtube. Love progress/upgrades on engineering projects
Same. Really disappointing how dismissive and unimaginative engineers and especially "engineers" can be.
@@jamesmelemede5610That was an unwarranted insult... This is a prototype, and it using as little of rare earth magnets isnt its purpose. A person just wanted to make a magnetic gearbox. Also isnt it quite usual for gearboxes to be bigger than the motors, especially if they need to do a massive reduction or is made out of weak materials like plastic? (Or is a prototype?)
@@custos3249Its just difficult to pull this off. It can be exhausting and costly in many ways. So gotta appreciate and celebrate those who do it
@@karyjas1 I get ya, but that's why we can't have nice things. Be it intellectual laziness or R&D costs being so artificially high thanks to market capture, patent law, or just simple low wages very, very few people can manage to put together a prototype, the result is stagnation and learned helplessness. And it's even worse when people assume tossing around napkin math and a 9th grade grasp of physics makes them Grand Poobah on Turd Mountain. Currently dealing with the type elsewhere related to rotary valve engines.
@@custos3249Heh i watched that video myself. Hey dont worry about thinigs outside of your control, dont stress yourself. Only do when you decide to do something about it. The situation isnt great, but more negativity is likely going to make things worse. So - may you have a good day and lets hope things will improve in the future while we do our best
the slip torque of this gearbox is actually crazy. the idea to use a planetary style and everything else that went into designing this motor is pure genius. with the ability to transfer such a high torque it shows that magnetic gearboxes have far better potential than i think many people realize.
Looks expensive
@@matthewfredrickmfkrz1934for now. economies of scale are possible if there is a strong enough need.
@@matthewfredrickmfkrz1934 With the exception of the bearings, there are no wear parts. Plus, an over-torque situation results in slipping instead of stripping a gear. This could seriously reduce wear and maintenance in some applications.
@@arthurmoore9488 85% efficiency for simple gearbox is a verdict.
It is dramatically more expensive to regularly replace bearings, disassemble and relube gears, or have massive failures when gears are over torqued and strip or at worst shatter and break other parts.@@matthewfredrickmfkrz1934
I used to always point out the reasons why something will not work for real applications, but I changed the way I look at ideas now. Who knows where it will be applied in what form (full, partial or modified). Amount of preproduction work that is study, modeling, printing or machining, presentation readiness and all the unseen trial runs etc and then the whole storyboarding, production and post production work, shows his level passion on the subject. I want to see the behind the scenes now right from study, research to post production of the video....
An attempt to productize a magnetic clutch/transfer was made by MagnaDrive back in about 2000. All of this looks familiar and they had some very good systems for misaligned shafts, vibration reduction, gearing, etc. Great looking aluminum housings and led by a former Boeing CEO. But heat dissipation, reliability, and lack of performance along with decreasing capability over time led to its demise. How do I know this? I was an investor and lost a lot of money in what appeared to be a promising technology. So, as much as I like to see someone showing the journey, I know pretty much where this effort ends.
The heating is due less to friction than it is to eddy currents caused by the rotating magnetic fields. Keep experimenting, but it might be useful to see what the state of the art is before engaging.
Excellent comment, but one company failing to productise can be a death-knell for a technology, at least for future private investment, simply because it will be forever assumed to be due to techical failure.
There are a lot of reasons such start ups fail, and the failure alone isn't enough to prove that there was really a show stopper.
Openly published research and development like this is pretty much the only way such technologies get a real chance.
The other way is government funded public research, mostly aimed at determining whether it's *worth* further pursueing. This video is totally perfect in an of itself: A good attempt was made, and there was fairly significant success. This comment further raises important issues, to which I will add: Is the failure over time due to 'wearing out' the magnets?
Magnets store energy, and it's usually difficult to 'drain' them when every interaction tends to go both ways. But it's not impossible, particularly if magnetic saturation and cyclic heating/movement is involved. When this is the case, it would account for gradually decreasing capability over time, but it might also be possible to engineer around that failure mode (ie, make it not a 'show stopper') so long as it is understood.
Failing to understand the long-term failure mode 'in time' to work around it can certainly seem like, and even BE a show-stopper, especially for a startup. Funding runs out before the payback, and the idea dies 'on the vine'. But it might not be truely a dead-end, just a last-minute pitfall the MagnaDrive engineers just didn't see in time to avoid. Given the pressure to push the performance to its limits to either maximise return on investment, or at least ease marketing, it is fairly likely that this kind of longevity failure would result.
Worse, those involved in the unsuccessful first effort, especially those 'stung' by other investment pulling out, would be likely to give great air-time to the apparent unworthiness of the technology. This is not wrong: It's important to share knowledge of hazards widely. It does suggest a good target for further research might be to actually try to reproduce the decline in performance over time, and then see if the mechanism of it can be confirmed.
From this video alone, it seems safe to say the magnets themselves can easily be monitored to avoid overheating them, so that issue might not be what really caused the decrease in performance over time.
So here's an alternative hypothetical mechanism:
The classic way to 'drain' a permanent magnet is to exploit the Curie point: Allow magnet to do work pulling an anchor (discharge energy), then use Curie point to demagnetise the anchor, reducing the force requirements to remove the anchor, without doing work against the magnetic field (which minimises the recharging that otherwise occurs), then cool the anchor, and repeat the cycle. This results in an 'engine' that runs, at least until the magnet drains. Similar trick can be pulled by energizing an additional coil to increase the magnetic field to the point the anchor becomes saturated, whereupon the permanent magnet 'loses traction' with it.
This gearbox isn't trying to be an 'engine' like this, but a similar effect could occur if anything exposed to the changing magnetic fields can behave even partially in a similar way (not necessarily Curie point, but also core saturation).
A way to measure this might be a high-range magnetic flux sensor mounted in front of one of the stator array magnets. If that shows a slow downward trend, you've caught it in the act of wearing out. But it might not be the stator magnets that wear out - could also be the inner array ones.
The easy way is to just keep conducting repeated efficiency and maximum slip experiments between extended power transfer runs.
The way I would do that is use two brushless DC motors, and two AC variable speed drive invertors, with at least one able to regen, and both running from the same DC bus. Therefore the power goes from one to the other and back to the bus, only less losses, which saves on having to completely supply/dump the energy as with a brake.
That way the power flow through the gearbox under test can be much higher than the AC outlet draw, so it can be run for a lot longer with less dissipation. Would use motors with different pole configurations to help account for the gearbox ratio difference.
I'd expect it potentially possible to arrange these gearboxes so they might actually tend to 'charge' the magnets: Thus preventing the fate of getting worse over time.
They'd get better, up to the point of saturating the magnets, probably at the cost of reduced efficiency. TANSTAAFL after all.
The other thing that may happen, is that effects on the state of the magnets may depend on details about the load - perhaps cycling in a certain way exacerbates magnet drain, and operating differently might avoid it?
Won't know without a better understanding of that mechanism.
Either way, the true reward of excellent research work is... more research work!
Idea. You currently have a fixed gearbox, but what if you were able to adjust the number of poles on the fly? Say by having an inner cage and then moving it between different housings, or play around with some electromagnets. You could have not just a gearbox, but a clutch-less transmission!
Good idea, will try it myself
Interesting idea. There's a way to 'turn off' or cancel out the magnetic field of permanent magnets, that actionlab demonstrates in one of his shorts. You might be able to use that in combination with the split torque release to change the power in the gearbox. Or like you said, by using electromagnets and varying their charge. It might even be possible just by taking advantage of its slip torque and using multiple gears, so that a stronger one engages when the weaker one reaches its maximum slip torque and so on, as a sort of automatic transmission.
Dude you are such a monster, not many viewers will understand the work, effort and knowledge that you've put in the video. Keep going like this buddy it's insane !
Ingenious design, with a lot of great improvements. You can have even more torque if the magnets in the center were mounted on a much stronger and stiffer material. The reason for this is that as you approach higher levels of torque, the material holding the magnets is starting to bend, so you lose tolerance. If you can tighten tolerances, and use stiffer materials then that will greatly improve torque.
You might be able to find a ferrite bar and shape what you need instead of cutting little tiny pieces of aluminum? (worth thinking about to save labor)
Great Inventiveness.
some of the best projects period. really well done man. impressive! keep pushing limits
Nice work!
In my bachelor thesis I constructed and build a magnetic gearbox around the same size as yours.
I managed to get 60 Nm of torque out of it.
One important thing is to get the magnets as close as possible to modulator.
If you want i can send it to you, its in german, but google translator can help you :D
I would love to see! Would you send it here: semidiych@gmail.com
That sounds pretty awesome.
How does your magnetic gearbox compare with what's generally available with more traditional gearboxes?
@@retsetman9698 i send you the thesis:)
@@MM-24 They require less maintainance and the cant break due to overload, because the just slip if overloaded
Spectacular work. Thank you for documenting this so well: what a great resource.
dude I was geniuenly sad when the video ended. Keep it going :)
This is a brilliant experiment and concept. In the first design with the screws, maybe you could stack M3 thin washers to create a cheap laminate effect. Well done and keep up the good work. It would be interesting to see if this design could spin larger propellers on drones. :)
7:01 This would be a good application for the Electrochemical Etching thing “Applied Science” design for “Photochemical Machining” !
This video/project was *professional* , the testing and full on *production engineering* to an extent is really refreshing when some may not go to those same lengths.
Really well done!
Uhm. You need to properly measure output power. 80 percent is shockingly good, but a properly scaled single ratio gearbox has low single digit losses.
Nice work though, and magnets are obviously a cool source of unique properties.
This is very interesting and original. I like your process. Very methodical and precise. I subscribed, and this is the first video I watched.
Thank you for putting in so much effort and sharing your findings with the world!
Thats really fascinating. And your metal work is great. Together with PCB way you could build a final version Out of Metal or Carbon.
I'm only part way through the video, so maybe you tested this, but I'm curious about the actual efficiency. Well made gears are quite efficient, and I wonder if induction and eddie currents will work against you just as badly as friction in a traditional gear system would. This is super cool though! It works so much better than I expected.
Edit: oh, nice! You tested the efficiency! I can't wait to see what you do next.
Well done, and thanks for the efficiency testing. Seems like most magnetic gearbox's aren't very good but yours is great! You certainly put in a lot of work.
This is amazing! I wish I could get one of these with a 5:1 ratio for my tractor. Then I could use modern 540rpm CCW impliments from the 3250rpm CW power take-off shaft of my 1980s machine.
Nice work and excellent diagnostic reporting. Don’t ever stop what you’re doing . You only learn by doing .😊
Love thst hi tech timing device.
Amazing video! Very inspirational, the level of detail provided, formatting, truly awesome.
Love your work. Very impressive! I have a new project Idea as a follow up: Replace the inner rotor with the stator from an Outrunner brushless DC motor. A rotating magnetic field from the stator should be equivalent to your inner rotor. Essentially you would have a internally geared Brushless DC motor!
@@retsetman9698 Also, heat, you would have an unventilated heater inside. which would mess with the modulation amount and the magnet life span. it would be better is the exterior part was stationary, as it would be easier to cool (big surface area, lots of copper to allow easier dissipation), but electromagnet halbachs are weird tho.
@@giuseppebonatici7169i had similar thoughts of an exterior electromagnetic coil set around the outside that could be modulated in such a way as to create a potential locking effect to increase output torque with little &/or variable energy input.
u guys are cool
This reminds me a lot on how toyotas ecvts work. Though while similar I think this gear box scaled up can do some real work.
This is excellent work, well done!
I highly suggest changing your bearings to nitride boron ball bearings. Not only will they not heat up as much, the ceramic bearings wont deform due to heat cycling or extended high rpm runs like metal bearings. They also chew up any junk that gets in the bearing unlike metallic bearings. But best of all? Less rolling resistance for higher system efficiency and less parasitic loss.
Excellent work, thank you for sharing the knowledge.
The only real world application for this I know of is in space. Where moving parts must work perfectly for decades, but don't necessarily need to be powerful.
having reliable gears never fail is useful for all of future society imagine building a machine and it just werks with no maintenance, this is a huge step in that.
Maybe something that can't be contaminated to oil, like hospital equipments
@@rian0xFFF true reliability is good for stuff like that but does any of it use gearbox? a similiar yet different variance of this tech perhaps
You could spend all those magnets on a servo itself. You could just run the "final drive" electronically directly..
Likewiise you can replace all the middle parts with wires,
@@UnrebornMortuus Dude, magnets have higher friction between them and heat things up by induction.
super beautiful video & process ! well done !! would be cool to have a presentation of your machining tools !!! Well done !!
This could have interesting use cases where obstruction of the mechanism by limbs is a risk factor. Like in places where people are working close to open gears or something, this could possibly used as a safty gear, that would have just enough holding force to move the shaft it needed to move, but any more resistance, like an arm or leg getting in the way, would be enough to push it past the magnets and stopping amputation.
Really cool.
Great work, development and explanation. 👍👍👍
i have no idea what i'm watching but i like it
Allright my dude you earned my sub we see you at 500k soon
Wow this is truely amazing
For a given weight (= cost/volume/size) of permanent magnets, an Hallbach array gives much LESS magnetic field than a traditional array + back iron. Commercial brushless motors always use back iron to close the magnetic circuit and never Hallback arrays.
really cool stuff. thanks for showing us
This vid got recommended to me out of the blue. I enjoyed it. However I'm not 100% sure about it's application as this is the first vid I've seen. I am a aerospace machinist shop monkey (I make the gears that go into any jet turbine engine. Military or commercial.) so if you ever need any help with that side of things I'll be happy to help. The clicking at the end is likely due to either the amount of runout which gets exaggerated with higher RPMS or (Most likely) the thingy a doo is poorly balanced which is causing runout. And seeing how you somewhat crudely cut those aluminum spacer things I'll be willing to guess that's the main issue. Anyways I love watching these kinds of vids.
Woah thats a super nice improvement. Especially with the magnets not heating up at all. I wonder what else you could improve from here?
Omg. What a hard work you did to make this video!
This is fantastic. Well Done!
I was just learning about another way to get the benefits of laminated steel without the issues of laminating steel; at least kind of. Either way, think a bunch of iron filings or iron from the ground, picked up with a magnet, set into a binder and poured into the shape of choice.
Edit:
I just tested a small mix of ground iron and clear gorilla glue which upon testing with a digital multimeter showed no conductivity. The properties seem quite similar to laminated cores. I do however have reservations of the particular glue I'm using to cure in large batches. Perhaps epoxy would be a better binder; yet I have not tested that.
That's a pretty good idea, but i would include a diamagnetic filler in addition to the metal. You want it to form flux tubes and you want to trap the flux in those tubes. Otherwise you'll have the flux tubes rearrange as the surface fields change.
@@Unmannedair I'm researching that now, thank you for the info!
Excellent work
This is so cool. Keep up the good work.
This guy could easily make a John Searl Generator with those skills :O
Excellent work 🎉
if you're trying to get rid of the clicking noise, you could try putting some lapping compound inside and running it slowly for a while.
Awesome video man. Great work!
I love your progress:D
if you wind coils in a halbach array, you can make a BLDC motor with integrated gearbox.
Exactly, that will be one of my future projects
First video i watched, hooked instantly. Can't wait to go through your content!
Do you think a minimized or megamized(?) system could be used to increase efficiency of a hand crank generator? This would be fascinating from a survival energy perspective.
I agree to use it provided that it is used for permanent magnets and not inductive magnets that are inefficient and polluting.
Imagine magnetic gear with superconductors
Lube and wear would be a thing of the past
I think this is beautiful for applications where you want slip at certain torque loads.
Yes, slip with no damage, amazing
@@violinviolator5841I will note that there are other ways of doing something similar. Many lathes have a system where the lowest gear ratio is coupled by ball bearings pressed by springs into divots on another gear. That way, when I do something stupid, it overcomes the spring pressure and slips instead of breaking the lathe.
@@arthurmoore9488 That's cool. I wonder what applications there are where this is specifically better suited than a mechanical design such as your lathe employs.
@@gormauslanderProbably anywhere that slip torque is expected regularly. I've seen the design for my lathe have trouble re-engaging, but it's fine since it's more like a circuit breaker than something I ever want to use. Direct drive, or near direct drive, hydraulics and electric motors could also probably slip without damage, but anything with a gearbox this has potential as compared to clutch pads.
Please try creating a hub motor with this gearbox
Hello, Is it possible for change permanent magnet to coil magnet?
I think about , Replace this in CVT Scooter.
Wonderful video! 👍
Thank you for doing so much work and sharing it with the world. 🏅🥰
do you have a parts list for the gear(less) box or the stls somewhere?
Yeah I’d love to try it out, and maybe it would help others on their projects, been a bunch of designs being shared for Cyclodial Gearboxes, maybe this can be like that too!
I love this!
This is awesome.
So genius!
Excellent work!
Nice research video🎉❤, can you explain what is the point making a magnetic gearbox instead of cutting conventional gears?
i think gear teeth gearbox would deliver more torque for that enables the magnets to be inbetween eachoher... so maybe a planetary gearbox or any with interlocking teeth
Most impressive. ❤
Freaking awesome man!
Those would be nice for application where you need the torque limiting.
id be curious what a scaled up version would do. maybe push a go cart or something bigger if done right.
The image of the halbach array induced fields looks like there is some room for pattern adjustment to improve the efficiency.
Would love to try making one of these myself someday, they look fun! xD
application for a lathe??
This has always been on my mind because of my lathe motor drive recently blew up due to overload. But the magnetic connection must be broken before the motor draws excessive current, which means the torque capacity must be at a certain value, or an electromagnet gearbox would be great for this.
so the gearbox would fail non-destructively in the daisy chain before anything else overloads or whatever thats neat
I love scientific kitchen scales.
Thx 😊!
I wish there was a miniature version to put on a RC car.
Nice, I'd love to see how much backlash there is with a load close to 100%
I think you could exchange the inner magnet Ring by a rotating magnetic field, thereby eliminating the need for a motor?
7:47 : A similar phenomenon can be observed in new bmw x2 electric as well as MG electric cars.
brother im interested in your work but find it hard to understand your accent, perhaps captions or a translater? bmi russian has done garage 54 voice over for years. maybe something alike?
love your creativity. people like you put innovation on the market.
great job looks exciting
New subscriber here and this is incredible!!! I need one of these....
Awesome stuff! Have you ever looked into 3phase torque conversion? That is, 3 phase motor such as any brushless hobby motor used as an alternator to transfer energy to another motor to have non-linear torque transfer.
Use alternative electronic controlled field. I only may assume that way must be easier to control gear ratio.
What I didn't say directly in the video was that the number of steel poles in the modulator is equal to the total number of magnet pole pairs. I could change the number of magnet poles with electromagnets, but then I wonder how to adjust the number of steel poles in the modulator.
the magnets wear out... even without contact. The flux eventually demagnetizes them...
Love it! Great follow up video! Nice work! What is the outer diameter of the whole assembly? From an engineering standpoint, it would be great to see what the maximum torque that could be transmitted, with the restriction of making the gearbox diameter the same as the motor (like a traditional DC motor sold on amazon with a spur gear based gearbox).
Check out the description
I hope you get credit and compensation for your R&D.
Berings still need mainenance. No gears, it's true. But it isn't entirely contactless.
I saw in another youtube video about exposing computers to magnets that a permanent magnet can loose it's magnetic force when heated, but it can also gain it back by heating it again. I don't remember exactly what video it was, but there shouldn't be too many videos of people exposing old computers to magnets where they talk about heating them.
Yep that’s correct, NileRed has such a shorts video but not by heating, as far as I remember, it was 🧲 again by giving high voltage
@@retsetman9698I remember the guy in the video specifically mentioning "popping it in the oven" as a means to re-magnetize it after de-magnetizing it to make it safe to mail without needing special packaging.
@@hellcat1988 I never thought they would demagnetize for something like this, it's really interesting. We're probably talking about the same method, by the way.
@@hellcat1988oven as a figure of speach, its high power electric pulse device, 2000v brrrt pulse
@@retsetman9698 The guy in the video was talking about the oven in his kitchen that you cook with. I know what I heard.
Do you think I can use the linier drive from an old washing machine as a transmission in my car?
You should experiment with Polymagnets!
Why are you getting 85% eff? Could it be the bearing? Maybe try dry unsealed bearings?
Problem with magnetics is the amount of internal loss because of eddy currents
I get the curiosity, but, wouldn't it be simpler to just use fluid coupling?
Sees thumb nail: “that’s what she said!”
Can you make a sim racing wheel out of this 😅, i suspect there will be slop in direction changes though?
Could this applied to something like a bike?
Question and Idea. Can this consept be done in 90 degree angle?
This is the coolest