I liked the video after minute, went back to full screen, after 3 minutes I exited the full screen and liked the video again but I have already liked it, back to full screen, at 6 minutes the story repeats. I really love informative clear videos like this.
@VeridicusFicta2 жыл бұрын
Absolutely amazing experiment and I love the way you presented your data! Beautiful stuff!!!
@14959787073 жыл бұрын
This is some good old school style KZbin, I love it
@matteof80573 жыл бұрын
damn right
@noutram10002 жыл бұрын
Hi, this deserves more views, some good science here, thx. The motor you show seems to be a radial flux type, have you made any axial flux motors with Halbachs? (I'm considering building one with two PM rotors and one electro-stator in the middle and wonder how Halbach might be built into both 'ends'... )
@zdenekvalek1538 Жыл бұрын
Thank you for nice experiment. The back iron for standard configuration would help much more if it was much closer (touching the magnets) and it is there to close the magnetic circuit on the back side. It helps the magnetic flux, because with back iron it doesn't need to overcome magnetic resistance on back side. And it also prevents electromagnetic waves/fields outside the motor. Also there is normally gap between south and north pole magnets to avoid magnetic circuit shortcut between the magnets. It also improves strength. Anyway, your experiment was interesting for me as I did not know much about the Halbach array.
@tribulationcoming Жыл бұрын
This is good stuff, a tremendous amount of work and understanding. This helps our understanding of how the Halbach array works. A great deal of explanation of a complicated subject.
@jonahjin43963 жыл бұрын
such linear halbach array is applied in many electronic products like ipad. Also, the electric motor of Tesla 3 also use linear halbach (4 rectangular neodymium magnets glued together) to enhance the torque. It's always fascinating to me when I see those brilliant applications of permanent magnets.
@user-wo9ey1xg1o Жыл бұрын
I'm trying to make a generator of my own design and this info is great, didn't know back iron would increase the strength also helps the frame I have in mind, Halbach and Back Iron frame. Thank you. 👍
@jimmaxwell22592 жыл бұрын
The image at 4:18 showing the Halbach w/ Backiron looks to me as though the middle magnet is orientated wrongly?? I expected it to look the same as the image to the left without the backiron. Minor point, but an overall fantastic presentation. Great work.
@BenjaminMarshallScienceMan2 жыл бұрын
Yeah, that's just an error with the graphic. The way it was actually tested is the same as your expectation.
@BooBaddyBig2 ай бұрын
I found that there wasn't much difference between a back iron and Halbach array. The back iron very nearly doubles the effective magnet height. For relatively short magnets that does almost the same as a Halbach array. For taller arrangements, the Halbach array may win (I didn't check). But the back iron has to touch the magnets. The main advantage of back iron is that the arrangement tends to more or less self assemble whereas Halbach arrays disassemble.
@captainamazing13569 ай бұрын
Fantastic data and very well done 👍
@jimmym27192 жыл бұрын
That’s something i learned today, thank you bro for sharing 💕
@SandBox863 жыл бұрын
Thanks for this videos, for the information you share, I recently developed some new concepts and watching you was useful to be sure I wasn't going the wrong way
@BenjaminMarshallScienceMan2 жыл бұрын
You're welcome! If you build anything cool, please show it to me!
@SandBox862 жыл бұрын
@@BenjaminMarshallScienceMan I'm working in COMSOL Multiphysics it's a nice piece of art. I was going to simulate this to see how the flux changes in every centerpiece. If you want 3D models I can make them no cost at all, I'm just a good boy.
@BrentLeVasseur17 күн бұрын
The outside ring would channel and direct the magnetic flow through the iron itself rather than letting it spill out into space. It’s the same idea with using a transformer core. You don’t want the magnetic field spilling out into space, you want to focus it and keep it contained.
@BrentLeVasseur17 күн бұрын
With a hall bach array, the magnetic flux flows directly from each magnet pole to the other magnet, which makes adding backing useless. The only time you would want backing is with non-permanent magnets/electromagnets. The physical metal of the magnets themselves is your backing material in an array making additional backing redundant, adding only cost and weight.
@Constellation32323 жыл бұрын
You held that first setup to the camera so perfectly, i thought the inside was convex 😂 then you moved it and i was like 🤯
@michaelwhite4260 Жыл бұрын
The graphs are off the charts!
@zkoibito7092 ай бұрын
You are the real life Peter Parker scientist. You almost look like him and sound like him in the earlier Spiderman movies. Go Webs Go. Magnetic Webs that is.
@gatekeeper842 жыл бұрын
I think the gap the plastic creates skews your results. You should glue the magnets together and test again.
@Alrukitaf Жыл бұрын
He already achieved a significant difference at 1mm gap and 5mm. So maybe gluing might increase the field at 9mm significantly also? But he only used a small amount of back iron. Most motors use considerably more back iron.
@Archin-dn4bp2 жыл бұрын
Hello Benjamin! Is it possible to make a switchable halbach array like switchable magnets?
@BenjaminMarshallScienceMan2 жыл бұрын
If you include a backiron behind your array, and then make a way that the primary magnets (the non-sideways ones) can rotate 180 degrees, then you could effectively turn the array on and off. By flipping the primary magnets, you're switching which side of the array is the strong side, and which side is the weak side. Adding the backiron provides a low reluctance path for flux, further weakening the array when turned 'off', and ensuring that the back side of the array is not too strong when turned 'off'. If you've ever seen a 'mag chuck', I'd be willing to bet that that is exactly how they work.
@Alrukitaf Жыл бұрын
Super effort and very interesting results. Hope this is repeatable with other research teams.
@lyallcampbell56132 жыл бұрын
Hey, great video. I was wondering does the thickness of the back iron need to be the same as that of the magnet to have any effect?
@Ponk_802 жыл бұрын
I find it kind of ironic that people keep doing the same mistakes as everyone else, thinking that fine-tuning is the answer to the problem, instead of trying out new ways, that actually might work. But hey, it just makes it that more easy for me to solve this problem, when everyone is being distracted by the magicians hand, instead of seeing what is actually going on.
@morankurdistan47163 жыл бұрын
it's super useful thanks
@ShellHeinze2 ай бұрын
Bloody brilliant!!
@ricanteja3 жыл бұрын
Don't know if this was mentioned in the video but I suspect the back iron added little to the magnets configured in the Halbach orientation because of the weaker back facing magnetic field. Great stuff!
@BenjaminMarshallScienceMan3 жыл бұрын
If you're referring to the graphic, that's just a mistake I made while drawing it.
@ToyotaKTM3 жыл бұрын
So does the back iron go on the weak side of the Halbach array? Also, your graphic shows two magnets for the standard arrangement and three for the Halbach arangement but you actually used nine magnets for both configurations, right?
@BenjaminMarshallScienceMan3 жыл бұрын
The back iron was placed on the weak side, yes. The graphic showing the arrangement of two and three magnets is just showing one pole. The tested configuration for each setup had four poles, and I averaged the reading for each pole together. The halbach arrangement uses three magnets per pole, but the outer two magnets can be shared by the neighboring poles. While the standard configuration uses two magnets per pole. Having a setup with four total poles results in the halbach array having nine magnets total, and the standard having eight total. If the array were configured into a loop, the halbach configuration and standard configuration would have the same number of magnets.
@FirstLast-tx3yj2 жыл бұрын
@@BenjaminMarshallScienceMan i believe a fair comparison is only one with the same total number of magnets Or at least total magnet surface per pole The results would lead me to assume three magnets in traditional configuration would have higher curve area and possibly peak than the halback array
@BenjaminMarshallScienceMan2 жыл бұрын
When the linear halbach array is closed into a circle (as it would be for a motor) it possesses the same number of magnets as a conventional array, since a pole in a halbach array shares its outer magnets with the neighboring poles, each pole only really uses 2 magnets. Also, the graphic pictured is showing the average field of every pole in the array rather than a single standalone pole. I personally think this is a fair comparison, but I probably could have made the graphic a little better.
@s0meus3r7 ай бұрын
Interesting work. Have you tried different shapes of iron ? Wander if for motors producing asymmetric field might increase the torque...
@haley80043 жыл бұрын
Awesome. I was going to do some similar investigations with Halbach and 3d printed motors. You're way ahead of me. I presume you've seen Christoph Laimer's videos? I like how he runs his wire close to the air gap, which probably relies less on the permeance of iron to conduct the field.
@madDragon082 ай бұрын
Since the Halbach tests were using 3 magnets vs the 2 magnets in the same direction, how much.... wait, you were measuring across a string of magnets and not just two. Alright. I was confused for a moment thinking that only two magnets were used to test strength.
@Dancer1487 ай бұрын
Good R&D approach, but Hallbach 3 magnet configuration should be compared with also a 3 magnet default setup with or without back iron. Graphs will look the same?
@dSquared0162 Жыл бұрын
Good study! Helps me a lot. Thanks. 👏👍
@PremiumMind9 ай бұрын
Thank you for your efforts. 💯
@Fish-ub3wn8 ай бұрын
10/10 much needed answer
@BrentLeVasseur17 күн бұрын
Have you had any luck sourcing custom cores from any manufacturers? I’m finding its difficult if you aren’t ordering thousands of them at a time.
@keenheat33353 жыл бұрын
apparently according to wiki, there is also halbach cylinder and halbach sphere configuration as well. The sphere configuration has around 4/3 times the ideal cylinder configuration given same amount of magnetic material. Not sure how to incorporate sphere configuration into a motor though, maybe two half spheres ? so the rotor housing can slide through. Also I wonder if you arrange regular electromagnetic in the same halbach array configuration, does it also increase its magnetic strength ? or is this a permanent magnetic specific feature ? great video btw
@BenjaminMarshallScienceMan2 жыл бұрын
A motor with spherical rotors/stators does not sound ideal, since any magnets near the axis of rotation would not provide a significant moment of torque, but it might be worth testing out. As for halbach electromagnets, in a couple simple experiments it looks like arranging electromagnets into a halbach array works, but provides less benefit and take sup more space than simply increasing the amount of current flowing through your electromagnet.
@MrDbertrand2 ай бұрын
change your magnet geometry to "PUSH" the medium into a twisting vortex
@whatelseison89703 жыл бұрын
The reason adding back iron to the Halbach array did basically nothing is because they are basically the exact same thing for the same reason; which is generally to get as much of the PM's flux cutting the working turns of copper to which it's meant to be coupled and nothing else. Using high permeability materials to back an array of magnets has an effect very similar to that of the H.A.'s at a fraction of the price, but it comes at the cost of greater weight and lower performance. In short, you can't improve the performance of a high performance system by also adding a low cost alternative to that system. The iron is basically unmagnetized dead weight because the Halbach is not leaking any flux to which the iron could offer a more direct path. It might seem counter-intuitive and a bad thing that the field dies off faster with distance from the magnets but it's actually highly desirable and a direct consequence of these field configurations. What we mean when we talk about the strength of a magnet in Tesla's at a particular point or region in space is is the _magnetic flux density_ - . The more the field can be confined to the windings, the better the specific power and efficiency of a (synchronous) motor can be. The air gap between them does need to be made as small as possible though.
@YouArtMusic-Oficial2 жыл бұрын
en todo caso en vez de hierro dulce deberia de utilizar una placa de mometal pero sigue sin tener mucho sentido pues el flujo se encontraria en sentido contrario , por lo que sigue siendo peso muerto ....
@russellwilson52462 жыл бұрын
hey the chart at 6 minuts shows 3 magnets used for hall bach and 2 magnets for standard..as an guy with absolutely no idea it seems an unfair comparison..i do understand here we are talking about focus not actual strenth...seems to me the back iron actualy takes strenth away (40%) but from the other side and reflects just 2% to the stator side.in an aplication like a bike the back iron would use more energy climbing hills than the 2% gain in magnetic strenth? but maybe if each of the 42 magnets gain 2% strenth maybe there could be a gain.in any case i would in my aplication be more interested in the weigh reduction.prhaps you could achive higher strenth by using diferen size magnets?..interesting stuff:)
@Hellspooned24 ай бұрын
Would making a Halbach array in 45 degree rotation between each magnet instead of 90 degrees do anything?
@BenjaminMarshallScienceMan4 ай бұрын
So if you had 3 magnets in a row, initially all pointing the same direction.... I'm imagining that as you turn the outer two magnets to point inward, your array transitions from being symmetric to unidirectional. In other words, I think that having the magnets at a 45 degree angle would just make for a less good halbach? I'm obviously not an expert though.
@nonsquid Жыл бұрын
So if you print your stator Halbach array with magnetic filament, would that act as a magnetic backplate or shunt diffuser? If you printed a ring backplate out of magnetic filament with normal PLA as the standard stator, would that improve your motor strength?
@craigjohnston360319 күн бұрын
Can you put two Halbach Arrays back to back. Weak side to weak side.
@adolfovilla7547 Жыл бұрын
Very nice!
@percyv5868 Жыл бұрын
hi benjamin , very good video! thx a lot. it provided me with the information needed! what was the thickness of the backiron? any specific steel type?
@arkangel87092 жыл бұрын
Hi Benjy, you look like a Super Hero cartoon character.!! With you're brushed on mustache.!! & You're "Baby Genius" Hiar - doe.!! Ha,ha, ha, HA go gett'em Benjy,!!
@user-zr3io2ft1x Жыл бұрын
did you perform this experiment on larger magnets array like 2 cm or thicker magnets ?
@dagemworku60352 жыл бұрын
Thanks buddy, it helped a lot. 👍
@philadelphiaslim41442 жыл бұрын
Brandon Marshall do you have social media of any sort? I'm about the same age and I've always been interested in future tech and learning about it and developing it. Would you be up to maybe emailing or something back n forth just to discuss different stuff and maybe get a lil interview from you.
@jimmaxwell22592 жыл бұрын
Question... in the Halbach array, what would be the effect of using lower strength magnets for the 'side orientations'? Would they still direct the field lines/flux through in the same way without detracting from the main power of the stator facing magnets?
@BenjaminMarshallScienceMan2 жыл бұрын
I haven't tested varying strengths of the side-facing magnets, but I can only imagine that you'd want them to be as strong as possible.
@russellwilson52462 жыл бұрын
thanks i learnt more than the answer i was looking for..here was my question..on an out runner does the rotor have to be steel or iron?..can it be for example nylon for less weight?...ihave a direct drive bike motor and its too heavy..after watching your vid seems i can replace the outer rotor steel/iron with say nylon..it wont be strong enough to take spoke loads but i can mount it forward of the wheel and drive the wheel by chain...thank you and any thaughts you have would be grate.
@lt59323 жыл бұрын
Good job
@BenjaminMarshallScienceMan3 жыл бұрын
Thanks dad.
@lt59323 жыл бұрын
@@BenjaminMarshallScienceMan Im proud of all my children.👍
@RixtronixLAB Жыл бұрын
Creative video, thanks :)
@amirahmadi7942 жыл бұрын
thank you
@gianbetos3 жыл бұрын
hi, if i want to make an axial motor o generator... how would it place the magnets???
@aothe22398 ай бұрын
its gold
@spath132 жыл бұрын
Thanks for sharing 🙂
@rozanug339010 ай бұрын
thanks
@Ibian6663 жыл бұрын
Thanks for doing this.
@BenjaminMarshallScienceMan2 жыл бұрын
You're welcome! I hope it has proven helpful.
@Ibian6662 жыл бұрын
@@BenjaminMarshallScienceMan Do you happen to know if a percentage increase in magnetic strength results in a similar rise in electric output from a turbine, say from a windmill?
@chrisclarke4664 Жыл бұрын
genius vibes
@jonnupe16453 жыл бұрын
Commenting for KZbin algorithm
@MJohnRupert3 жыл бұрын
Center magnet orientation seems to be wrong @5.41 Halbach w/ Backiron configuration. Please check!
@BenjaminMarshallScienceMan3 жыл бұрын
Yeah, I was initially intending to test the weak side of the halbach, so I drew the chart to reflect that. Then I decided that it'd be a better idea to test a halbach with a backiron, and forgot to update the graphic.
@richardwalker98263 жыл бұрын
i would like to know if anyone has ever tried using a magnetic setup like a halbach array to make a vacuum sealed portable or non-portable electricity generator that could possibly use a wind up spring or other source of power like solar? the possibilities are endless to create renewable sources of power generation if you can combine ideas, technology, and resources with practicle application
@projectwes45732 жыл бұрын
thanks for the video
@KokoroDenshin Жыл бұрын
sad, already paid for back plate iron lol wish i know this earlier😅
@1kreature3 жыл бұрын
Magnet mass vs pole count pr area needs to be identical to compare strength properly...
@BenjaminMarshallScienceMan3 жыл бұрын
Once you form a halbach array into a circle, the number of magnets and poles ends up being the same as a standard array since a pole within a halbach array shares its outer magnets with its neighboring poles. Even if you were only making a linear array, the entire halbach array would only require one extra magnet over a standard array for the same number of poles. You can see this in the video at 0:45. Each array has 4 poles, the halbach uses 9 magnets and the standard uses 8.
@rottondog14733 жыл бұрын
looks like the same area count. 2 @ standard for one pole vs. 1/2 +1+1/2 for the halbach and the other side of the 1/2 are for the next pole.
@learneverything6593 жыл бұрын
Which kind of paper that one? How can I buy this
@BenjaminMarshallScienceMan3 жыл бұрын
It's called 'Magnetic Viewing Film'. I bought it on Amazon very cheaply.
@learneverything6593 жыл бұрын
@@BenjaminMarshallScienceMan Thank U so much for your reply.
@enotdetcelfer3 ай бұрын
Nice methodology for the most part, but testing 2 magnets in standard vs 3 magnets in halbach doesn't really compare the configurations honestly imo.
@BenjaminMarshallScienceMan3 ай бұрын
That's just the image. The actual readings came from magnets embedded in an actual array. Also the halbach pole is sort of composed of one and two half-magnets.
@carolinebell43602 жыл бұрын
Season are you
@learneverything6593 жыл бұрын
How about that meter? How can I buy? and cost?
@BenjaminMarshallScienceMan3 жыл бұрын
100 GBP on Amazon. www.amazon.co.uk/dp/B07KMYSP9Q/ref=cm_sw_r_cp_apa_fabc_x2.7FbDHWBVR9?_encoding=UTF8&psc=1
@learneverything6593 жыл бұрын
@@BenjaminMarshallScienceMan Thank you dear
@haley80043 жыл бұрын
cheaper similar ones on Aliexpress. The magnet paper too.
@BenjaminMarshallScienceMan3 жыл бұрын
I just use Amazon for the one day shipping in the UK.
@learneverything6593 жыл бұрын
@@haley8004 Could you please suggest which brand is good one for both or send me the link