Couldn’t you switch out the magnets for electromagnets and alter which ones are turned on and at what power in order to change the “gear” ratio. It would make car transmissions way simpler and probably many other things.
Yes, that works, but it takes so much power to operate the electromagnets that any mechanical transmission (even continously variable designs) is more efficient.
In principle that would work, but if you go that far, why not just use an electric motor that doesn't require a gear box to drive your car? Oh, wait... 😊
@@helmutwalle2105 correct me if I'm wrong but on paper, the following could work. Assigning a static motor as input. Use a audrino with electric magnets. Have the external module installed with 24 (or more) electric magnets. The audrino will simulate a gear shift powering 1/4, 1/2, 3/4 and all electric magnets. The more magnets that get switched on, the faster it would spin. It would also be able to change direction so you'd have forward and reverse. In theory it could work. Please try. I don't have a 3d printer. The housing would be larger than the current 1st Gen. If it works in practicality, then not only would Manuel give you a smoother shift, but automatics would would get you a faster than current shift. Almost like a live shift. It will also eliminate the "Manuel vs automatic" argument as you would be able to switch between the two variations.
I wonder how deep this could go. Could you build tiny electromagnets and power them wirelessly and use that as a means of controlling them to change how the "gearing" interacts?
A mag clutch would do. They have been used to drive screw superchargers. Have gear/pulley set to 100% speed then reduce clutch power to allow for slip.
Magnetically coupled motor assemblies have been done before, the issue is the load, a mechanically driven assembly will always outperform and significantly cheaper and less complicated
The comments are awesome. I'm just a layperson who can usually keep up with technical discussions but everyone here are talking way over my head, and I love it.
there is a reason we dont see these used very often it is because they have really bad efficiency , cost and torque handling and in all but a few very VERY specific cases it is way cheaper and way better to either use a conventional gearbox or to grab an off the shelf electrical motor that fits the parameters needed
only thing "amazing" about it is how amazingly naive the commenters are... completely useless for any application where output has variable load (99% of applications), let alone replace an automotive transmission...
🧲 What was omitted in his report was the extreme heat generated from the magnets passing within extreme close proximity of each other. That’s why there is no footage of this running at high speed for any length of time. Otherwise his magnets would lose nearly all of their magnetic field.
Hey I commented on your last video about magnetic gears as well, I am PhD student who’s focus is on the design and analysis of magnetic gears. Great work so far. I have built many larger scale prototypes (with slip torques of greater than 50 Nm) and have quite the experience with optimization of MG designs, let me know if you want any tips for your future projects.
Hi I'd like to know more about these, would like to know large scale application of the same, I'm working on a project to implement these magnetic gear boxes for industrial conveyor systems
@@ZartaxtheWise I don't think that this would exactly be used for a LSD, that said they do have electronic LSDs that use a motor and clutch pack to control wheel slip. Loosely a motor has a similar design as this, but since this reduces torque and multiplies speed it would likely not be useful as I could imagine those applications need more torque
Hi Selek, do you know what is efficiency for transferred energy. I see no reaction on bearings in that scheme, no friction in moving parts, it means no losses of that kind, but are there any other specific losses of energy
@@horeca-tech6741 the magnets will induce Eddy currents in the metal components and heat that metals up which mean from magnetic energy loses into thermal energy (heat).
In case you wonder why you don’t see these anywhere in your daily life, here’s the reason. They are only good for low to ultra low torque applications because the gears slip so so easily. But in low torque applications, wear and tear is also proportionally negligible if you just use a conventional gearbox. Remember the only advantage of magnetic gearing is low friction leading to low wear and tear? Yeah. These make interesting RUclips videos. Practicality wise, 🤷
Cool! I would wonder about entirely blaming the bearings at the end though. At 10k RPM the modulator cores are seeing about 100k magnetic field flips per second I think, and your screws might not be up to operating efficiently at 100kHz. They might want to be ferrite rods, rather than conductive. Did you record the input RPM at all for the max speed runs? Is it overloading the motor and bringing its RPM down, or is it slipping*? Also, when running it like that, what gets hot? *Incidentally, being able to slip without damage can often be a desirable feature, rather than a problem.
@odysseus9672 Main heat dissipation happens I the passive flux modulator, which will not cause permanent damage. Also curie temp for modern materials is above 300 C° so plastic melts first.
it looks amazing man well done! I think the balance of the parts as well as their torsional strength to resist warping is the most important for high speed....balance above everything. I saw some people made dynamic balancers....could be a fun project especially if you like making motors
So many people here seem to have the same questions or misconceptions so here are two main things I've seen: Can magnets loose their magnetism? Magnets can be created and lost under extreme circumstances, for example when a magnetic material is heated up to near its melting point, the inner aligned particles are free to rotate however. I also believe you can change the polarity of a magnet with a strong enough magnetic field to force the particles to rotate. Will the gear slip? Yes, under sufficient load, however with powerful magnets you'd be surprised to see that it can carry over a lot of force.
Its pretty cool what he's doing. Its been done before and didnt catch on for various reasons. "The Owen Magnetic was a pioneering American brand of hybrid electric luxury automobile manufactured between 1915 and 1922. Car models of the brand were notable for their use of an electromagnetic transmission and were early examples of an electric series hybrid drivetrain."
Cool project but inefficient for real world applications. Could you do a follow-up and show the efficiency comparing it to mechanical gear. It would be an interesting video
Purely due to limitations of having to use a 3d printer and screws. If it were made with any kind of precision it would be more efficient than any mechanical gearbox, and slip wouldn't result in catastrophic failure, just efficiency losses, which, if anything could be a great diagnostic tool if something goes out of spec. It can accept 2 inputs as well, though the utility of that is a bit more questionable, I'd argue. Though in applications where timing is critical, I don't think these would be great.
I had a gear set made by Lego around 1970, and learned gear ratios then. This could really be marketed as an educational toy as well, if enough different bits and pieces were included. Heck, I might be tempted to buy one for myself!!👍
Magnetic bearings would ideally be incorporated to have a zero wear/contact mechanism. This may cause a problem with the lower tolerances allowing for vibrations, possibly making it unsuitable for high rpms or high vibration environments.
You could treat them like journals and lubricate them accordingly if you design high-tolerance parts. It would be a gearbox with a much lower lubrication requirement than a standard gearbox, and with a built-in failsafe torque as well
This is an epicyclic gearbox as used in bicycle hub gears and wind turbines. They normally use straight cut gears but are are the most efficient type of gearbox.
Around about 2012, I can recall a company called Magnomatix (or was it spelled Magnomatics?) what did a video explaining the concept behind their magnetic gearboxes. It was a 2D animation. Now, in 2022, this is the first real-world example that I have seen of one working. Just... you standing _that_ close to a 3D printed prop that's spinning _that_ fast? Yikes! What if the prop itself had exploded? Excellent work, all the same, though.
@@brianb-p6586 Yea, I couldn't remember how their name was spelled, & all I could remember were those animations. I thought it was a pretty cool concept, back then. =^/.^=
This is awesome, great work! Unrelated to this, though sort of related: it would be AMAZING if you could do a magnetically balanced axle, i.e. magnetic bearings instead of friction. A 3D-printed magnetic bearing system for a magnetic rotor would be worth some money!
Interesting but this raises a lot of questions from an engineering standpoint: 1. Does this have any useful application that gives improvements over mechanical? 2. What is the efficiency for power transmission (I surmise it is very poor)? 3. The turns ratio seems clear enough, but the torque transfer is far from clear - high input torque is required to overcome the magnets even with no load!!
I was psyched up, bout to watch this awesome looking video and learn how this little gearbox works. Then he broke out the magnetic field viewer and I instantly didnt care about the gearbox anymore. How did I not know that was a thing. Thats amazing. Mind blown. Then I got back into it when he put the motor on it, and bam cant beleive thats how he ended it 😆
i think you just test this with more rigid materials like epoxy or fiberglass/carbon wrap. this looks like a viable option once you play with different materials and balance out the radial forces so there’s no interference at high speeds. will probably try to replicate and do tests in the future for fun
Dude..... i am Not sure that you can comprehend what a revolution you just started on my head... I am just pazzled why I didn't think of it all this for all thus years myself?? Any how thank you for this great video!
I see a couple of improvements that could reduce the wearing of the plastic by the set screws. 1 replace them with free spinning bearings. 2 put in a delron spacer in between the ring gear and the modulator. Delron being a high density plastic that reduces the friction between metal and itself
This is an incredible proof of concept. Many refinements could be made to increase longevity of the mechanism and possibly create a viable system. keep up the good work.
Amazing work. As you increased the ratios and the speed, I couldn't but think about the drive torque limits. In a mechanical gearbox the gearset shear strength is the limiting factor before failure. Here there wouldn't be a failure (assuming not 3D printed with plastic resin), but there would be slippage at the torque limit. For a practical application, with little wear, how do you determine the torque capacity?
Seems the torque capacity would be determined by the strength of the magnets, past that point it would be like sheering the teeth off of a gear. The issue with this at scale, in a full sized truck I think the magnets would be strong enough to fry your laptop's hard drive, though an SSD would be fine of course.
i hope you make a follow up video about this magnetic gearbox to work underloads, because i am quite interested in how much it can carry or lift a sum amount of weights until the magnets lost it's traction.
Oh wow that’s cool. I imagine that’s also somewhat shock-resistant as a big shock could just be cushioned by the magnets, or maybe even skip some pole pairs, but either way it wouldn’t get destroyed. I wonder how much power it can transmit, in a mechanical gear you get all the power sent through minus a bit of loss as long as the forces aren’t enough to shear off the teeth but I expect this would have a maximum torque that the magnets can hold before it slips. I’d also like to know about any eddy currents and heating effects in the non-permanent magnets and bearings.
Yes, in fact the slipping is what people seem to like about these. While with standard gears you will simply have the teeth break off or other weaker parts damaged if parameters are exceeded, here you can adjust the magnets so that they slip at a specific force where nothing gets damaged yet. Very convenient.
Magnetic gears have major faults too 1 they can't be taken over certain rpm's because the magnets will decouple and damage the whole gear box 2 they are more expensive 3 they magnetise the bearings not allowing them to roll freely thus creating more friction and wear 4 they have very little load capacity before decoupling happens.
This was a great video; I also love magnetic gears. However, I have a problem with them that I haven't been able to find a concept for. I cannot see how magnetic gears could compete with higher torque transmissions than what most have shown. Gearing down could possibly solve the issue, but this would increase the size of such contraptions that use magnetic-gearing. Do you think you'd be able to show an example of a much higher torque transmission load without much reduction (or comparable to a mechanical reduction)? An example could be a magnetic-transmission comparable to a car's transmission (scaled down, of course). I would be super grateful of some proof (if it exists) that magnetic-gears could compete with the torque transmission loads of a mechanical gear.
I've designed and messed around with magnetic gears and what I've found as their biggest issue was the requirement for magnetic coupling strength to match tourqe output. Earnestly however with the newer magnetic materials this is not much of an disadvantage over gear teeth, expect in the tremendous additional costs!
@@3CODKing the metrics of costs increasingly defy logic, in a solar system that is soon to be mined with more minerals then everyone could use a thousand times over, and more energy from the sun then we could use a billion times over! But, till the time comes, it is what it is.
ahhh nice work although you seem to hitting the same brick wall that i did IE the cogging out at higher RPMS... you could try a hybrid design possibly and add and EDDY current arrangement in to the whole array. The eddy currents would mitigate the cogging. good luck thanks for posting Si
The genius ability which lets you manifest your inventions into existence and your dedication to that process is something so amazing and valuable!!! I strive to and hope to get to that level in the future myself. 2 ideas: 1) Build multiple units and connect them in series where 1st's output powers 2nd's input and so on. 2) Keep adding multiple layers of concentric alternating circles while increasing components at the established rate. Like a Russian nesting doll.
Cool concept and it could be very useful in many applications, one concern I have is certain heat temperature makes metal non magnetic, I wonder what is the tolerance of this gear system
I can only imagine the amount of times it slipping when trying to turn a heavy object. Also your "Oh" at the end of the video made me thought there's a person behind me (wearing earphones), scared me for a moment
Yes, they are, although I don't know much about them. We had a job come to our welding shop to build a small platform for a pump system. It will have a 40HP motor and a pump with an integrated magnetic gearbox. It has to be built pretty rugged and with tight tolerances. The motor turns at 3600 RPM, whereas the pump spins at nearly 10,000 RPM. In this case, the motor weighs 600 lbs. where the pump is 55 lbs. Sundyne is the company supplying the pump and motor.
I'm in love with the design of these gears, not exactly what I've been thinking about related to magnetic fields and their properties but definitely related :) Still need to find out a way to generate a "hollow" magnetic field from a central point though. The idea being having a sphere that is generating a field from it's center creating a "magnetic" wall on the sphere's surface BUT leave the interior free of any magnetism. Then, combining multiple fields on that surface with resonant frequencies in a configuration where the fields are rotating in different directions in a interleaved fashion, Ideally I'd be having 4 fields moving left to right, right to left and top to bottom and bottom to top. The fields when looked at should look like a weave pattern, not unlike clothing. The next goal is to increase these fields strength and play with their resonance frequencies both directly between opposing path fields between the 90 degree paths. This last experiment would ideally allow for a fields configuration that would result in what would feel and act like a solid surface. If successful shooting a bullet at this would result in the bullet being stopped with nearly 0 impact on anything beyond this magnetic mesh field, not unlike a sci-fi "shield". The possibility of the bullet getting "melted" or otherwise destroyed will definitely be higher then 0. A bullet made of magnetic metals would be guaranteed to be severely affected by such a field, I'm curious to find out how exactly :P
@@chaitanyasindagi1237 Yep, that. Interwoven magnetic sheets of "bidimensional" magnetic "sheets" interleaved at resonant frequencies in crossing paths at 180 and 90 degrees. Thing is, how to create such a contained magnetic field, basically single lines of force perfectly aligned to a single plane.
Yes, they're a poor design. Simple rectangular bars would be much better, trapezoidal (keystone) section bars would be better, and a stack of laminations would presumably be much better.
There are applications of exactly what you're showing. For a propeller, you may be able to run the motor at a lower RPM at cruise. Similar to shifting a car to a higher gear when cruising on the highway. I'm not an aviation expert, but I think most aircraft use a narrow RPM band, only one gear for the propeller, and sometimes variable pitch props. This might be more efficient at cruise, but it would obviously require lots of testing before implemented.
Amazing video, thank you for that! Do you maybe have a list of the specific materials needed to build the magnetic gearbox you built. Thank you in advance.
I'm not sure if I know enough to speak as an authority on this sort of thing, but this certainly does seem to have promise for miniaturizing gearboxes, which could be incredibly useful for stuff like drones. As I've seen in some of the comments, the magnets can't support an indefinite amount of weight constantly repelling each other, regardless of the load, but it could conceivably decrease the weight of a gearbox for projects that require a small load, which might not be as revolutionary as some people may think it could be, would still be a very valuable advancement in technology.
There's a market opportunity for this technology in aviation. In general aviation applications, there are gearboxes (prop speed reduction units PSRU) that reduce engine rpm down to accommodate optimum propeller speeds. Most propellers need to run between 2,200 and 2,800 rpm. Anything faster and the blade tips go supersonic where they're not efficient. Most legacy piston aircraft engines are low tech, big bore, affairs. They drive the propeller directly through the crankshaft at 1:1. So low rpm where engines are not as efficient as they could be. Very reliable but low tech stuff designed in the 40s-50s. There are faster revving engines in GA with PSRUs but the weak link is the reliability and high maintenance requirements of the gearboxes. Especially in the higher horsepower ranges. Another challenge is harmonics and damage done when engine power pulses damage or wear gearbox components and the propeller. It looks like this would have it's own harmonics/pulsing challenges but maybe not as much as a direct drive gears? Could this dampen the pulses from a piston engine? Could this tech be scaled up to high torque applications? I think most 250hp+ piston engines produce torque in the 400-500 ftlb range. ruclips.net/video/lYwUQBi3EW0/видео.html I think this tech could solve a lot of the drawbacks of using a faster revving engine coupled to a PSRU.
i would love to print off and do some tests of my own. and chance you would like to share the project files at all? would be really appriciative if you could. thank you
So that's how those work. We had a job come to our welding shop to build a small platform for a pump system. It will have a 40HP motor and a pump with an integrated magnetic gearbox. It has to be built pretty rugged and with tight tolerances. The motor turns at 3600 RPM, whereas the pump spins at nearly 10,000 RPM. In this case, the motor weighs 600 lbs. where the pump is 55 lbs. Sundyne is the company supplying the pump and motor.
The wear at the end was due to the drive motor input shaft not being coaxial, and exerting a radial force in the shaft. The carrier then was pivoting over its single bearing and therefore the end of the carrier cup was hitting the ring.
Put the clutch on the bands of an automatic transmission. Then a new clutch is easy. Just drop the pan, unclip the old band and put in a new one! Good project for you. (they say that the replacement of the old clutch is so high that a manual clutch is not practical.)
There is actually need for lubrication, any of the moving parts that connect to the shaft would need to be lubricated, right? It's not like nothing in that entire thing is making contact with anything else. Just a question
it'd be great to discuss the pros and cons of this. clearly there is resistance so there are losses. the strength of the magnets would also limit the torque that can be used. its an interesting concept but what practical application?. surely a brushless motor would be far better?.
I foresee several issues. It cannot be disengaged, i.e. no neutral. It's going to be massive, both big and heavy. It will have a lot of inertia, reducing acceleration and making the shifting procedure very complex. It will be inefficient, every time a conductor (like the allen screws) "slips" through a magnetic field there is a parasitic current generated that causes heat loss. It will require a fluid and radiator for cooling. It will jitter at low rpms and high torque when the rotor "slips" more easily and noticeably.
If you really think about it, magnetic gear boxes are just kinetic energy transformers. It could be that we can combine modern electric motors and some form of automatic magnetic gearbox so we can have variable torque motors.
Could you not use a light oil/mineral oil in the gearbox/transmission housing to help remove vibration/friction, maybe a lubricant that is under a little pressure? I apologise if this is a stupid idea, with no background in building magnetic transmissions I am spit balling. Thank you for sharing your video.
Don’t forget the modal interaction of magneto reluctance, and capacitive deractance you also have to remember the prefamulated amulite casing grammeters and the fact that there are specialized applications for something like this
This is basically just a dynamo but it uses only permanent magnets instead of electromagnets. Also, this is hella cool, I wonder why people have not done this yet.
It's a gear ratio of 1:6 with no touching parts. This is actually pretty genius. Now if we could cost affectively up scale and manufacturer with correct tolerances. I can see this gear box being be used in maybe in equipment, or vehicles, or maybe even wind turbines since wind turbines are very hard to service this would be great because there is no touching parts of the tolerance are correct
Sir i just have a little advise to your work,change your metal bearing to ceramic bearing. Metal bearing will have tremendous effect on magnets it will experience a much more friction..
This is amazing. But it looks that the issue is mechanical stability at higher RPMs. That suggests metal. I guess aluminium is out of the question due to eddy currents creating a breaking effect? Which metal could you use to fashion the mechanical cages from instead of plastic? Would it be easier to just manufacture the whole thing out of a iron nickel allow and add permanent magnets to that? Really intriguing. I guess this would be perfect for gears in robot joints or drone prop drives.
I know this is asking a lot, but I would love to see a transmission style. Your current build would be a simple gearbox with 1 input to output ratio, but if you add some way to change the ratio, you’d be able to have a transmission. I would imagine you could use electromagnets to make a w speed transmission, and if you building it big enough, you’d be able to have some magnets be dormant and engage at a later time to make a multi-speed transmission. I’d love to see this made somehow.
@@jasonneu7519 No, that would be if you used the output for energy production. I've done some brainstorming on this and what I have is a lot like what Retsetman has made here, but with more complicated by having electromagnets involved. The main difference being that the outside rotor would have wires leading to each magnet. Each magnet would be replaced with an electro magnet. If your input gear had 10 "teeth" and your output gear had 100 "teeth" you have a 1:10 and a mechanical advantage of 10. Now take those 100 magnets and set them up so instead of being + - + - + - turn on a switch that reverses polarity of certain electro magnets so you output gear was - - + + - - ++ your now have an output gear with only 50 "teeth". This would give you a gear ration of 1:5 and a mechanical advantage of 5. You will be getting less torque but more speed. This is exactly what you want in vehicles. More gear ratios means you can have a higher torque outputs. This is why tractor trailers are sometimes 18 speed transmissions, while cars are typically a 5-6 speed transmission. Same thing applies to high end cars; the corvette used a 4 speed transmission. This mean it could quickly take off and hit high speeds, but wasn't strong. So in order to reduce weight of the car, they used fiberglass for the body, and not steel. Fun fact, that's why you don't see corvettes that have been in accidents, you crash, its totalled. If a vehicle were able to have a magnetic gearbox, it would be able to have any number of gear ratios. Since it has any number of gear ratios, it would be able to use computers to calculate the best ratio. If done correctly, this would make it so the transfer from one ratio to the next may not even be detectable as it cycles through 100 rations in under a minute.
The problem with these is that if you made one out of metal this would create electrical currents that would house the metal to heat up a lot. Also all those interacting electrical and magnetic fields would probably mess with electromagnetic waves like radio waves, making wireless communication kind of sketchy. I would probably want to encase the gearbox in a faraday cage.
What makes you think that? The strongest permanent magnet are made using neodymium, which is a common element that require refinement prior to use. If you're talking about naturally occurring magnetic material like lodestones, they might be becoming more rare, but who cares, They aren't what's uses in the production of magnets used for motors and linkages and such All commercially applicable magnets are manufactured as an amalgam of various metals that then goes through a sintering and machining process.
Yes. But the loading capacity would degrade significantly with use. The heat and cold would also degrade it too. The worst would be the constant exposure to other magnetic fields. So it not really feasible in most scenarios but some places it thrives.
So you could use one off these to 100% waterproof a stuffing box on a boat or ship if you could build a very thin case between the gray and red segments?
Let's say that the magnets are encased in aluminum, and we decide to use a twin prop design, if the gearbox were struck with lightning, would this potentially reduce or eliminate the magnetism enough to make it inoperable?
Can't wait to see final design with not wobbling rotor and planetary gear. But I gues 3d print can't support hollow shaft with another shaft in it. You can use metal tube and internal rod and glue them to plastic gear and rotor respectively.
![Kodak Black - Versatile 4 [Official Video]](http://i.ytimg.com/vi/VcP_1Ua__vY/mqdefault.jpg)
Couldn’t you switch out the magnets for electromagnets and alter which ones are turned on and at what power in order to change the “gear” ratio. It would make car transmissions way simpler and probably many other things.
Yes, that works, but it takes so much power to operate the electromagnets that any mechanical transmission (even continously variable designs) is more efficient.
In principle that would work, but if you go that far, why not just use an electric motor that doesn't require a gear box to drive your car? Oh, wait... 😊
@@helmutwalle2105 correct me if I'm wrong but on paper, the following could work.
Assigning a static motor as input. Use a audrino with electric magnets. Have the external module installed with 24 (or more) electric magnets. The audrino will simulate a gear shift powering 1/4, 1/2, 3/4 and all electric magnets. The more magnets that get switched on, the faster it would spin. It would also be able to change direction so you'd have forward and reverse. In theory it could work. Please try. I don't have a 3d printer. The housing would be larger than the current 1st Gen. If it works in practicality, then not only would Manuel give you a smoother shift, but automatics would would get you a faster than current shift. Almost like a live shift. It will also eliminate the "Manuel vs automatic" argument as you would be able to switch between the two variations.
@@helmutwalle2105 Electric cars still have a single speed gearbox/reducer. Usually around 9:1.
@@VNCTHE1 - yes, I know many still do. The technology used in production EVs is not very sophisticated. This may change in the future.
I wonder how deep this could go. Could you build tiny electromagnets and power them wirelessly and use that as a means of controlling them to change how the "gearing" interacts?
why just not use a motor at this point?
The answer would be yes but it would have to match pole pairs with flux modulators
A mag clutch would do. They have been used to drive screw superchargers. Have gear/pulley set to 100% speed then reduce clutch power to allow for slip.
Magnetically coupled motor assemblies have been done before, the issue is the load, a mechanically driven assembly will always outperform and significantly cheaper and less complicated
That's how the predecessors to servo motors worked!
this is an excellent design! 👏😎
Thanks a lot!
Neat project. Love the comments from trained engineers and innate gearheads who know the plusses and minuses of a system like this.
The comments are awesome. I'm just a layperson who can usually keep up with technical discussions but everyone here are talking way over my head, and I love it.
there is a reason we dont see these used very often
it is because they have really bad efficiency , cost and torque handling
and in all but a few very VERY specific cases it is way cheaper and way better to either use a conventional gearbox
or to grab an off the shelf electrical motor that fits the parameters needed
This comment needs to be at the top. Magnetic gear boxes are a joke for the application shown.
@@byugrad1024 exactly even the cheapest nylon gears and gearboxes can handle more torque and cost pennies to make
only thing "amazing" about it is how amazingly naive the commenters are...
completely useless for any application where output has variable load (99% of applications), let alone replace an automotive transmission...
🧲 What was omitted in his report was the extreme heat generated from the magnets passing within extreme close proximity of each other. That’s why there is no footage of this running at high speed for any length of time. Otherwise his magnets would lose nearly all of their magnetic field.
Hey I commented on your last video about magnetic gears as well, I am PhD student who’s focus is on the design and analysis of magnetic gears. Great work so far. I have built many larger scale prototypes (with slip torques of greater than 50 Nm) and have quite the experience with optimization of MG designs, let me know if you want any tips for your future projects.
Hi I'd like to know more about these, would like to know large scale application of the same, I'm working on a project to implement these magnetic gear boxes for industrial conveyor systems
Could you make an LSD (limited slip differential) with this?
@@ZartaxtheWise
I don't think that this would exactly be used for a LSD, that said they do have electronic LSDs that use a motor and clutch pack to control wheel slip. Loosely a motor has a similar design as this, but since this reduces torque and multiplies speed it would likely not be useful as I could imagine those applications need more torque
Hi Selek, do you know what is efficiency for transferred energy. I see no reaction on bearings in that scheme, no friction in moving parts, it means no losses of that kind, but are there any other specific losses of energy
@@horeca-tech6741 the magnets will induce Eddy currents in the metal components and heat that metals up which mean from magnetic energy loses into thermal energy (heat).
In case you wonder why you don’t see these anywhere in your daily life, here’s the reason. They are only good for low to ultra low torque applications because the gears slip so so easily. But in low torque applications, wear and tear is also proportionally negligible if you just use a conventional gearbox. Remember the only advantage of magnetic gearing is low friction leading to low wear and tear? Yeah. These make interesting RUclips videos. Practicality wise, 🤷
Bingo.
Cool! I would wonder about entirely blaming the bearings at the end though. At 10k RPM the modulator cores are seeing about 100k magnetic field flips per second I think, and your screws might not be up to operating efficiently at 100kHz. They might want to be ferrite rods, rather than conductive.
Did you record the input RPM at all for the max speed runs? Is it overloading the motor and bringing its RPM down, or is it slipping*? Also, when running it like that, what gets hot?
*Incidentally, being able to slip without damage can often be a desirable feature, rather than a problem.
the modulator cores i guess because of rapid changing magnetic fields like in power transformers, but much more because of higher frequency
"being able to slip without damage can often be a desirable feature" EXACTLY !! I RECKON THAT'S THE BEST BIT OF THE IDEA
Leads to more slip under load
Avoiding large amounts of damage and not having to take the gas turbine down to replace the shear pins sounds like a great idea to me
They don't get 100k flips a second, but 1.6k, rpm is rounds per minute.
It'd be interesting to see a thermal view. Using magnetic flux to transfer the power, I imagine you must be losing some energy as heat.
Yep, and heating up magnets tends to demagnetize them. So, there is some wear and tear.
@@user-pd2rp7rf9v Doesn't matter - I'm assuming no touching between the parts.
@@user-pd2rp7rf9v you wouldn't use gear oil, too thick and would loose power to that. could use some really thin oil as a coolant probably though
as long as they are below currie temp they will last a long time
@odysseus9672 Main heat dissipation happens I the passive flux modulator, which will not cause permanent damage. Also curie temp for modern materials is above 300 C° so plastic melts first.
it looks amazing man well done! I think the balance of the parts as well as their torsional strength to resist warping is the most important for high speed....balance above everything.
I saw some people made dynamic balancers....could be a fun project especially if you like making motors
So many people here seem to have the same questions or misconceptions so here are two main things I've seen:
Can magnets loose their magnetism?
Magnets can be created and lost under extreme circumstances, for example when a magnetic material is heated up to near its melting point, the inner aligned particles are free to rotate however. I also believe you can change the polarity of a magnet with a strong enough magnetic field to force the particles to rotate.
Will the gear slip? Yes, under sufficient load, however with powerful magnets you'd be surprised to see that it can carry over a lot of force.
Super interesting! Never heard of a magnetic gearbox, but I can see how it could excel in the right application.
Its pretty cool what he's doing. Its been done before and didnt catch on for various reasons. "The Owen Magnetic was a pioneering American brand of hybrid electric luxury automobile manufactured between 1915 and 1922. Car models of the brand were notable for their use of an electromagnetic transmission and were early examples of an electric series hybrid drivetrain."
Cool project but inefficient for real world applications. Could you do a follow-up and show the efficiency comparing it to mechanical gear. It would be an interesting video
Purely due to limitations of having to use a 3d printer and screws. If it were made with any kind of precision it would be more efficient than any mechanical gearbox, and slip wouldn't result in catastrophic failure, just efficiency losses, which, if anything could be a great diagnostic tool if something goes out of spec. It can accept 2 inputs as well, though the utility of that is a bit more questionable, I'd argue. Though in applications where timing is critical, I don't think these would be great.
Excellent video! I've never heard of a magnetic gearbox and I've been in automation for 30 years. Always new things to learn :)
You know the reason why.
@@ettorebugatti6846 Is that a question?
@@adisharr nooo, it was because homeopathic gears ar not used for transmiting force.
@@ettorebugatti6846 Homeopathic gears?
@@adisharr Doesn't show up on google.
I had a gear set made by Lego around 1970, and learned gear ratios then. This could really be marketed as an educational toy as well, if enough different bits and pieces were included.
Heck, I might be tempted to buy one for myself!!👍
I've visualized this for years, I'm stoked to actually see it!
Great video. My favorite kind of video is where I understand about 90% of it.:)
Never knew these things even existed until I saw this video. Ingenious.
Magnetic bearings would ideally be incorporated to have a zero wear/contact mechanism. This may cause a problem with the lower tolerances allowing for vibrations, possibly making it unsuitable for high rpms or high vibration environments.
You could treat them like journals and lubricate them accordingly if you design high-tolerance parts. It would be a gearbox with a much lower lubrication requirement than a standard gearbox, and with a built-in failsafe torque as well
This is an epicyclic gearbox as used in bicycle hub gears and wind turbines. They normally use straight cut gears but are are the most efficient type of gearbox.
Around about 2012, I can recall a company called Magnomatix (or was it spelled Magnomatics?) what did a video explaining the concept behind their magnetic gearboxes. It was a 2D animation. Now, in 2022, this is the first real-world example that I have seen of one working.
Just... you standing _that_ close to a 3D printed prop that's spinning _that_ fast? Yikes! What if the prop itself had exploded?
Excellent work, all the same, though.
I was covering my face with PEI sheet but I guess it doesn't show in the video lol
The company was Magnomatics, and that's the name of their RUclips channel with those animations
@@brianb-p6586 Yea, I couldn't remember how their name was spelled, & all I could remember were those animations.
I thought it was a pretty cool concept, back then. =^/.^=
You just disigned the future gearbox. Great work! Now perfect it.
Thanks so much for this awesome demonstration! It's one of the most comprehensive I've seen!
this design has greatly improved since i last saw it and it looks like it runs much smoother now, very excellent
This is awesome, great work!
Unrelated to this, though sort of related: it would be AMAZING if you could do a magnetically balanced axle, i.e. magnetic bearings instead of friction. A 3D-printed magnetic bearing system for a magnetic rotor would be worth some money!
Well I think magnetic bearing is already exist but it still use common bearing, it's called electric motor 😬✌️
Interesting but this raises a lot of questions from an engineering standpoint: 1. Does this have any useful application that gives improvements over mechanical? 2. What is the efficiency for power transmission (I surmise it is very poor)? 3. The turns ratio seems clear enough, but the torque transfer is far from clear - high input torque is required to overcome the magnets even with no load!!
I was psyched up, bout to watch this awesome looking video and learn how this little gearbox works. Then he broke out the magnetic field viewer and I instantly didnt care about the gearbox anymore. How did I not know that was a thing. Thats amazing. Mind blown. Then I got back into it when he put the motor on it, and bam cant beleive thats how he ended it 😆
The grey plastic ring-gear widens because of the centrifugal force, at this high speed.
Great project!
i think you just test this with more rigid materials like epoxy or fiberglass/carbon wrap. this looks like a viable option once you play with different materials and balance out the radial forces so there’s no interference at high speeds. will probably try to replicate and do tests in the future for fun
Dude..... i am Not sure that you can comprehend what a revolution you just started on my head...
I am just pazzled why I didn't think of it all this for all thus years myself??
Any how thank you for this great video!
I see a couple of improvements that could reduce the wearing of the plastic by the set screws. 1 replace them with free spinning bearings. 2 put in a delron spacer in between the ring gear and the modulator. Delron being a high density plastic that reduces the friction between metal and itself
just to correct you Delrin or acetal, same thing.
This is actually highly classified technology from submarine engineering. Expect a visit from PTB.
You should try to make a prototype using a halback array configuration and also decrease the distance between the magnets and the grey core!
nice, I learned today of the existence of magnetic gearboxes.
It would be awesome to use magnetic bearings as well! Maybe a 3 dimensional layout can also accomplish this? Great vid thanks!
oh mind blown ... 🤣
This is an incredible proof of concept. Many refinements could be made to increase longevity of the mechanism and possibly create a viable system. keep up the good work.
Amazing work. As you increased the ratios and the speed, I couldn't but think about the drive torque limits. In a mechanical gearbox the gearset shear strength is the limiting factor before failure. Here there wouldn't be a failure (assuming not 3D printed with plastic resin), but there would be slippage at the torque limit. For a practical application, with little wear, how do you determine the torque capacity?
Seems the torque capacity would be determined by the strength of the magnets, past that point it would be like sheering the teeth off of a gear.
The issue with this at scale, in a full sized truck I think the magnets would be strong enough to fry your laptop's hard drive, though an SSD would be fine of course.
i hope you make a follow up video about this magnetic gearbox to work underloads, because i am quite interested in how much it can carry or lift a sum amount of weights until the magnets lost it's traction.
Oh wow that’s cool. I imagine that’s also somewhat shock-resistant as a big shock could just be cushioned by the magnets, or maybe even skip some pole pairs, but either way it wouldn’t get destroyed. I wonder how much power it can transmit, in a mechanical gear you get all the power sent through minus a bit of loss as long as the forces aren’t enough to shear off the teeth but I expect this would have a maximum torque that the magnets can hold before it slips. I’d also like to know about any eddy currents and heating effects in the non-permanent magnets and bearings.
Yes, in fact the slipping is what people seem to like about these. While with standard gears you will simply have the teeth break off or other weaker parts damaged if parameters are exceeded, here you can adjust the magnets so that they slip at a specific force where nothing gets damaged yet. Very convenient.
Magnetic gears have major faults too 1 they can't be taken over certain rpm's because the magnets will decouple and damage the whole gear box 2 they are more expensive 3 they magnetise the bearings not allowing them to roll freely thus creating more friction and wear 4 they have very little load capacity before decoupling happens.
This was a great video; I also love magnetic gears. However, I have a problem with them that I haven't been able to find a concept for. I cannot see how magnetic gears could compete with higher torque transmissions than what most have shown. Gearing down could possibly solve the issue, but this would increase the size of such contraptions that use magnetic-gearing. Do you think you'd be able to show an example of a much higher torque transmission load without much reduction (or comparable to a mechanical reduction)? An example could be a magnetic-transmission comparable to a car's transmission (scaled down, of course). I would be super grateful of some proof (if it exists) that magnetic-gears could compete with the torque transmission loads of a mechanical gear.
I've designed and messed around with magnetic gears and what I've found as their biggest issue was the requirement for magnetic coupling strength to match tourqe output.
Earnestly however with the newer magnetic materials this is not much of an disadvantage over gear teeth, expect in the tremendous additional costs!
@@humanistwriting5477 everything is about cost blows ass but yea
@@3CODKing the metrics of costs increasingly defy logic, in a solar system that is soon to be mined with more minerals then everyone could use a thousand times over, and more energy from the sun then we could use a billion times over!
But, till the time comes, it is what it is.
Now this is why YT is one of my fav platforms. Not for all the fake and reversed vids.
Great stuff❤️
ahhh nice work although you seem to hitting the same brick wall that i did IE the cogging out at higher RPMS... you could try a hybrid design possibly and add and EDDY current arrangement in to the whole array. The eddy currents would mitigate the cogging.
good luck thanks for posting
Si
Also maybe a Halbach array for the pole groups instead of double magnets to make for stronger fields for more torque.
The genius ability which lets you manifest your inventions into existence and your dedication to that process is something so amazing and valuable!!! I strive to and hope to get to that level in the future myself.
2 ideas: 1) Build multiple units and connect them in series where 1st's output powers 2nd's input and so on.
2) Keep adding multiple layers of concentric alternating circles while increasing components at the established rate. Like a Russian nesting doll.
Cool concept and it could be very useful in many applications, one concern I have is certain heat temperature makes metal non magnetic, I wonder what is the tolerance of this gear system
Questions:
1 what energy conversion efficiency of this gearbox?
2 how you gonna deal with vibrations caused by magnetic fields?
I'm wondering about the max torque this can produce before slipping 🤔
Me too, it would be totally incredible to use this setup and it can handle high torques...just imagine what you can do with that in real life!!
About 99% less max torque than the equivalent mechanical gearbox I’d guess.
BOSS you mage new revolution of gear box..u r got dump Genious.......i salute you
This would probably also work a lot better with a Halbach array as well, so that all magnetic flux is focused internally.
I can only imagine the amount of times it slipping when trying to turn a heavy object.
Also your "Oh" at the end of the video made me thought there's a person behind me (wearing earphones), scared me for a moment
These are very interesting indeed my question is have any over these been put into production or even used in any full version projects?
Yes, they are, although I don't know much about them. We had a job come to our welding shop to build a small platform for a pump system. It will have a 40HP motor and a pump with an integrated magnetic gearbox. It has to be built pretty rugged and with tight tolerances. The motor turns at 3600 RPM, whereas the pump spins at nearly 10,000 RPM. In this case, the motor weighs 600 lbs. where the pump is 55 lbs. Sundyne is the company supplying the pump and motor.
I'm in love with the design of these gears, not exactly what I've been thinking about related to magnetic fields and their properties but definitely related :)
Still need to find out a way to generate a "hollow" magnetic field from a central point though. The idea being having a sphere that is generating a field from it's center creating a "magnetic" wall on the sphere's surface BUT leave the interior free of any magnetism. Then, combining multiple fields on that surface with resonant frequencies in a configuration where the fields are rotating in different directions in a interleaved fashion, Ideally I'd be having 4 fields moving left to right, right to left and top to bottom and bottom to top. The fields when looked at should look like a weave pattern, not unlike clothing.
The next goal is to increase these fields strength and play with their resonance frequencies both directly between opposing path fields between the 90 degree paths. This last experiment would ideally allow for a fields configuration that would result in what would feel and act like a solid surface. If successful shooting a bullet at this would result in the bullet being stopped with nearly 0 impact on anything beyond this magnetic mesh field, not unlike a sci-fi "shield". The possibility of the bullet getting "melted" or otherwise destroyed will definitely be higher then 0. A bullet made of magnetic metals would be guaranteed to be severely affected by such a field, I'm curious to find out how exactly :P
LOL what
@@chaitanyasindagi1237 Yep, that. Interwoven magnetic sheets of "bidimensional" magnetic "sheets" interleaved at resonant frequencies in crossing paths at 180 and 90 degrees.
Thing is, how to create such a contained magnetic field, basically single lines of force perfectly aligned to a single plane.
have you made any progress, is like to discuss this project with you
just imagine the eddy currents on the screws
Yes, they're a poor design. Simple rectangular bars would be much better, trapezoidal (keystone) section bars would be better, and a stack of laminations would presumably be much better.
thank you for proving this concept. I've been trying to do this by carving by hand.
I think the result was amazing considering that you mostly used 3D printed materials. 👌
There are applications of exactly what you're showing. For a propeller, you may be able to run the motor at a lower RPM at cruise. Similar to shifting a car to a higher gear when cruising on the highway. I'm not an aviation expert, but I think most aircraft use a narrow RPM band, only one gear for the propeller, and sometimes variable pitch props. This might be more efficient at cruise, but it would obviously require lots of testing before implemented.
Can't understand what you're saying.
Amazing video, thank you for that! Do you maybe have a list of the specific materials needed to build the magnetic gearbox you built. Thank you in advance.
I'm not sure if I know enough to speak as an authority on this sort of thing, but this certainly does seem to have promise for miniaturizing gearboxes, which could be incredibly useful for stuff like drones. As I've seen in some of the comments, the magnets can't support an indefinite amount of weight constantly repelling each other, regardless of the load, but it could conceivably decrease the weight of a gearbox for projects that require a small load, which might not be as revolutionary as some people may think it could be, would still be a very valuable advancement in technology.
Does it heats up?? Have you meassure the efficiency ? Is it convenient for use in car transmision?
Wow! Thanks. I thought i knew a lot about gears. But what is the efficiency regarding heat generation due to the changing magnetic fields?
Can't upvote this enough, especially the humor :D
There's a market opportunity for this technology in aviation. In general aviation applications, there are gearboxes (prop speed reduction units PSRU) that reduce engine rpm down to accommodate optimum propeller speeds. Most propellers need to run between 2,200 and 2,800 rpm. Anything faster and the blade tips go supersonic where they're not efficient.
Most legacy piston aircraft engines are low tech, big bore, affairs. They drive the propeller directly through the crankshaft at 1:1. So low rpm where engines are not as efficient as they could be. Very reliable but low tech stuff designed in the 40s-50s. There are faster revving engines in GA with PSRUs but the weak link is the reliability and high maintenance requirements of the gearboxes. Especially in the higher horsepower ranges. Another challenge is harmonics and damage done when engine power pulses damage or wear gearbox components and the propeller.
It looks like this would have it's own harmonics/pulsing challenges but maybe not as much as a direct drive gears? Could this dampen the pulses from a piston engine?
Could this tech be scaled up to high torque applications? I think most 250hp+ piston engines produce torque in the 400-500 ftlb range. ruclips.net/video/lYwUQBi3EW0/видео.html
I think this tech could solve a lot of the drawbacks of using a faster revving engine coupled to a PSRU.
i would love to print off and do some tests of my own. and chance you would like to share the project files at all? would be really appriciative if you could. thank you
I would like to also. I love teaching kids physics in fun ways!
So that's how those work. We had a job come to our welding shop to build a small platform for a pump system. It will have a 40HP motor and a pump with an integrated magnetic gearbox. It has to be built pretty rugged and with tight tolerances. The motor turns at 3600 RPM, whereas the pump spins at nearly 10,000 RPM. In this case, the motor weighs 600 lbs. where the pump is 55 lbs. Sundyne is the company supplying the pump and motor.
I saw the title of your video and I subscribed. It's the first tiime I've seen your channel in my RUclips feed.
The wear at the end was due to the drive motor input shaft not being coaxial, and exerting a radial force in the shaft. The carrier then was pivoting over its single bearing and therefore the end of the carrier cup was hitting the ring.
Put the clutch on the bands of an automatic transmission. Then a new clutch is easy. Just drop the pan, unclip the old band and put in a new one! Good project for you. (they say that the replacement of the old clutch is so high that a manual clutch is not practical.)
This makes the very idea of Electric Jet Engines very close, closer than what lilium jet has been developing. Very exciting!!!
There is actually need for lubrication, any of the moving parts that connect to the shaft would need to be lubricated, right? It's not like nothing in that entire thing is making contact with anything else. Just a question
it'd be great to discuss the pros and cons of this. clearly there is resistance so there are losses. the strength of the magnets would also limit the torque that can be used. its an interesting concept but what practical application?. surely a brushless motor would be far better?.
So this isn't a gearbox
This is a transmission
Keep up the good work
I foresee several issues. It cannot be disengaged, i.e. no neutral. It's going to be massive, both big and heavy. It will have a lot of inertia, reducing acceleration and making the shifting procedure very complex. It will be inefficient, every time a conductor (like the allen screws) "slips" through a magnetic field there is a parasitic current generated that causes heat loss. It will require a fluid and radiator for cooling. It will jitter at low rpms and high torque when the rotor "slips" more easily and noticeably.
If you really think about it, magnetic gear boxes are just kinetic energy transformers. It could be that we can combine modern electric motors and some form of automatic magnetic gearbox so we can have variable torque motors.
Could you not use a light oil/mineral oil in the gearbox/transmission housing to help remove vibration/friction, maybe a lubricant that is under a little pressure? I apologise if this is a stupid idea, with no background in building magnetic transmissions I am spit balling. Thank you for sharing your video.
Don’t forget the modal interaction of magneto reluctance, and capacitive deractance you also have to remember the prefamulated amulite casing grammeters and the fact that there are specialized applications for something like this
This is basically just a dynamo but it uses only permanent magnets instead of electromagnets.
Also, this is hella cool, I wonder why people have not done this yet.
I wonder how torque behaves with one of these, could you make a video about that please?
It's a gear ratio of 1:6 with no touching parts. This is actually pretty genius. Now if we could cost affectively up scale and manufacturer with correct tolerances. I can see this gear box being be used in maybe in equipment, or vehicles, or maybe even wind turbines since wind turbines are very hard to service this would be great because there is no touching parts of the tolerance are correct
Here's a idea! Can you add more internal rings? That way you can choose which one is stationary, which one is moving, or which ones are motorized?
Sir i just have a little advise to your work,change your metal bearing to ceramic bearing. Metal bearing will have tremendous effect on magnets it will experience a much more friction..
This is amazing.
But it looks that the issue is mechanical stability at higher RPMs. That suggests metal. I guess aluminium is out of the question due to eddy currents creating a breaking effect?
Which metal could you use to fashion the mechanical cages from instead of plastic?
Would it be easier to just manufacture the whole thing out of a iron nickel allow and add permanent magnets to that?
Really intriguing. I guess this would be perfect for gears in robot joints or drone prop drives.
Fascinating content presented in a way that made me laugh multiple times. Great vid
If you angled the magnets, could you make the gearbox behave like a traditional helical gearbox?
Clever concept, I like it, I think the separator/orbiting gear simulator needs a front bearing as well.
Excellent design. Have you measured the torque and efficiency of the magnets? knowing that would be interesting.
I know, I know!!
Their extreme inefficiency!?! Amazing.
I know this is asking a lot, but I would love to see a transmission style. Your current build would be a simple gearbox with 1 input to output ratio, but if you add some way to change the ratio, you’d be able to have a transmission. I would imagine you could use electromagnets to make a w speed transmission, and if you building it big enough, you’d be able to have some magnets be dormant and engage at a later time to make a multi-speed transmission. I’d love to see this made somehow.
I was thinking alternator to the but I imagine adding a transmission with free moving magnetic energy would lead you to free energy right?
@@jasonneu7519 No, that would be if you used the output for energy production. I've done some brainstorming on this and what I have is a lot like what Retsetman has made here, but with more complicated by having electromagnets involved. The main difference being that the outside rotor would have wires leading to each magnet. Each magnet would be replaced with an electro magnet. If your input gear had 10 "teeth" and your output gear had 100 "teeth" you have a 1:10 and a mechanical advantage of 10.
Now take those 100 magnets and set them up so instead of being + - + - + - turn on a switch that reverses polarity of certain electro magnets so you output gear was - - + + - - ++ your now have an output gear with only 50 "teeth". This would give you a gear ration of 1:5 and a mechanical advantage of 5. You will be getting less torque but more speed. This is exactly what you want in vehicles. More gear ratios means you can have a higher torque outputs. This is why tractor trailers are sometimes 18 speed transmissions, while cars are typically a 5-6 speed transmission. Same thing applies to high end cars; the corvette used a 4 speed transmission. This mean it could quickly take off and hit high speeds, but wasn't strong. So in order to reduce weight of the car, they used fiberglass for the body, and not steel. Fun fact, that's why you don't see corvettes that have been in accidents, you crash, its totalled. If a vehicle were able to have a magnetic gearbox, it would be able to have any number of gear ratios. Since it has any number of gear ratios, it would be able to use computers to calculate the best ratio. If done correctly, this would make it so the transfer from one ratio to the next may not even be detectable as it cycles through 100 rations in under a minute.
Wouldn't a flux modulator require a flux capacitor to work at peak efficiency?
The problem with these is that if you made one out of metal this would create electrical currents that would house the metal to heat up a lot. Also all those interacting electrical and magnetic fields would probably mess with electromagnetic waves like radio waves, making wireless communication kind of sketchy. I would probably want to encase the gearbox in a faraday cage.
Have you patented this amazing design?
The fact that magnets are becoming more and more rare
What makes you think that?
The strongest permanent magnet are made using neodymium, which is a common element that require refinement prior to use.
If you're talking about naturally occurring magnetic material like lodestones, they might be becoming more rare, but who cares,
They aren't what's uses in the production of magnets used for motors and linkages and such
All commercially applicable magnets are manufactured as an amalgam of various metals that then goes through a sintering and machining process.
Could a magnetic gearbox hold load though? Can it actually do work as in, can it transfer horsepower?
Yes. But the loading capacity would degrade significantly with use. The heat and cold would also degrade it too. The worst would be the constant exposure to other magnetic fields. So it not really feasible in most scenarios but some places it thrives.
@@need2connect could graphite be used as a lubricant in areas where friction causes damage to the gearbox?
So you could use one off these to 100% waterproof a stuffing box on a boat or ship if you could build a very thin case between the gray and red segments?
Let's say that the magnets are encased in aluminum, and we decide to use a twin prop design, if the gearbox were struck with lightning, would this potentially reduce or eliminate the magnetism enough to make it inoperable?
These are pretty neat but stall and starting tourqe are an issue
With physical gears, the max torque is based on the material properties and geometry of the gear. What would be the analog here?
Strength of magnets, magnetic properties of the materials (especially in the intermediate ring), and magnetic circuit design (gaps, etc).
Can't wait to see final design with not wobbling rotor and planetary gear. But I gues 3d print can't support hollow shaft with another shaft in it. You can use metal tube and internal rod and glue them to plastic gear and rotor respectively.