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In this video I compare magnetic and mechanical gears in terms of efficiency to see which one performs best. Some time ago I built a concentric magnetic gearbox with radial flux. Although it has an extremely low torque limit, I am very interested in it thanks to its advantages such as quiet operation, no friction and no lubrication. In order to reduce some of the question marks about whether they can replace mechanical gears in the future, I designed an electromagnetic brake with which I can compare the efficiency of mechanical and magnetic gears. For efficiency, it is essential to put a load on the output shaft and compare how much reaction is generated on the input shaft in the gearbox in response to this load, and the basic principle of the electromagnetic brake is based on the friction between an electromagnet and a brake disc connected to the output shaft and with this electro magnetic brake, the efficiency of almost any gearbox or motor can now be calculated.
This was by far the best visualization of how magnetic drives and motors work I've ever seen!! It was so cool watching the fields push/pull the driven gear. Definitely subbed this channel is going somewhere!! Thank you so much!
6:00 one thing I find fascinating is not just that the residual magnetic force held an insane 40 kg of holding force, but that it also disappears completely once it's torn apart.
I did a physics experiment for school once where I tested electromagnets and I didn't think this effect would play any meaningful role but I was wrong. the force slowly lowered throughout the tests at different amounts of windings. normally the amount of windings multiplied by current gives the magnetic flux, magnetic flux is the strength of the entire field. basically when we went from low to high windings the strength got higher the longer power was applied and when we went from high to low windings the opposite happened and force only slowly started decreasing with the rate at which it happened being directly effected by the field we were applying.
Simply amazing graphics presented and topics covered.
I really like this series about magnetic gears, can't get enough😁
I really like this series about magnetic gears
This will be big. The applications of this are amazing.
Excellent work!
Incredibly executed and presented I provide you with my respect for these are important principles :)
Very interesting! Thank you.
I'd like to see this done with electromagnets and a non-ferrous motor casing. I wonder if a plaster and glue mix would be able to handle the stresses, maybe with a sand aggregate. Any chance you could give that a try?
It seems to me that the magnetic coupling in the magnetic gear box is very similar to the fluid coupling in a torque converter. I wonder if you could use the same idea to make a fluid coupling based gearbox? it would have similar advantages to the magnetic one but I think the fluid coupling would be far better at transferring torque so the efficiency might be better and it should be able to handle a fair amount of torque unlike the magnets.
I haven't seen you on here for a while. You're giving a great teaching presentation. 😃😃👋👋💖💖
Die easiest way to measure the efficiency /to compare those types of gears is to set up 2 gears and use a motor as generator with resistive load and measure the electric input energy and the electric output energy, sure there are many loses but if everything is same except the gear it works to compare them pretty well
…why not simply use a generator (dyno; motor used in reverse) with an electrical load attached? Like regenerative breaking in an electric car. That’s adjustable, almost zero wear, and commercial ones even come with spec sheets stating _their_ efficiency so you can calculate how much power was taken out of the system.
That is exactly what I came down to the comments to ask. Reinventing allot of wheels here. just need a generator as the load, as he is trying to figure out what one is more efficient you don't even need to do to much calibration or know the efficiency losses for the generator and motor as you are just trying to find what one is reducing the output the most and by how much. I guess its one of those cases where you over think the problem and miss the obvious solutions and while trying to figure it out you reinvent that solution. after all a generator is just a magnetic brake. I have fallen into this trap a number of times so I cant judge. Still clever.
What was the cost to have PCBWay machine the steel parts of the electromagnetic break? It's an attractive service, but that's then very dependent on cost.
in my experience, Half the market price.
You can try with an aluminum or coper disk and an electromagnet close to it to have dynamic resistance without magnetization
I think you mean an eddy current brake that I can change the power of, right? It's really much easier, but if it gets hot, it will affect the results a little bit. Although there is wear in this system, there was no heating despite all the friction.
@@retsetman9698 A bldc motor used as a generator on variable resistances would work fine
i would use an copper disc and an electromagnet to build an break. so because the parts will never touch it cant wear out. the breaking force can be changed with the power of the electromagnet.
To mesure efficiency you make a winch or crane eg put a known weight and use the motor to pull it 1 meter from the floor. Time how long it takes to travel 1 meter(distance/time = speed)
I would love to see how muck power a electromagnetic gearbox requires, for the maximum efficiency.
I see what you mean, but I couldn't play with the load on that magnetic gearbox more, it already has a torque capacity of 0.04 Nm. I will try that if I improve the magnetic gearbox
How about magnetic fading under high heat condition?
Eddy curent brake ?
I have to admit the end result of the magnetic gear being less efficient than the mechanical gear was unexpected. One strange thing I noticed was that the central shaft of the magnetic gear didn't turn "smoothly" but rather it jerked from 1 point in rotation to the next point in rotation. This suggests to me that the screws on the ring between the magnets are a source of inefficiency. Just out of curiosity, what happens if you increase the ratio of the number of screws in that middle ring... Does that change the gearing ratio? Great effort!
Yes, the gear ratio changes, even it needs to be a certain number, one more or one less will cause the gearbox to function improperly, it acts like a mechanical gear with a broken gear tooth.
That jerking suggests the magnets are alternating between fighting and helping rotation. If the strength of the magnets (electromagnets or mechanical) could be varied with excellent timing then it could be smoothed-out and efficiency improved. It could be a gearbox and motor in one device.
Using pure iron instead of screws for the pole pieces and making them thinner should increase the efficiency quite a bit.
Güzel içerik aga ilgi alanına girer mi bilmem ama benim şu ana kadar arka planını merak edipte çözemediğim bir konu var hani turbojet motorlarını üretirken çeşitli makinelerle giriş fanının ağırlık merkezini nasıl tespit ettiklerini bir türlü anlayamadım makineye bağlıyorlar makine çeviriyor ve bilgisayar ağır olan kısmı işaretliyor daha sonra operatör oradan kırpıp fanı mümkün olduğunca dengeli hale getirmeye çalışıyor. Bir türlü o bilgisayarın nasıl tespit ettiğini anlamadım hatta bir tanesi eliyle fanı tutup tespit ediyordu falan büyücü mü lan bunlar
Yan na Yung ISA SA set Ng MGA gear na pwedeng pang mabigatan pang malakian in pang malakasan pang mabilisan
maybe put a spacer between the magnetic and the disk ?
Magnetic drag instead of friction-brakes?
a generator would be better, even has a power output built into it
Use AC on the brake it has less residual, especially at higher frequencies.
An eddy current brake would have been a lot easier and more linear.
i would be curious to see this as well
wouldn't be easier to simply lift a known weight rather than an electro brake? The elctro brake is way cooler tho xD
yeah as you said, there are easier ways, but since I was always dealing with gearboxes, I had to do something systematic like this
@@retsetman9698 you would probably get much more reliable results doing what they suggested. An actual load rather than a simulated load would probably be much easier to do. If you have a spool at the output with a rope and a known mass then you can calculate how much torque it is producing or you can directly calculate the power output.
next: make infinite variable transmission,
use a copper sleeve ac magnet maglev configuration, maglev + gears, 2-in-1 package
thats a constant torque screw/bolt driver tool
use copper casing, not iron, no residual magnet field
or aluminium case
nice test, get the best optimized end result
👍👏👏
it is not " mechanical " spring. this term is wrong; because mechanical spring is Multiple types. It is more correct to call it a physical ( Solid ) spring.
I do not like electronics at all. They are consumer-grade, too sensitive, and under the control of companies, in addition to dangerous electromagnetic pollution.
Consider using some AI model for voice if you can't improve your pronunciation.
Get to the point bro
yes it's nice to dive right in, but the challenges to get there can be more fun and inspiring
The video isn't about the destination; the video is about the journey.