How to build a 3D printed ironless radial airgap alternator for micro-wind turbines Laplace partner of the project "light up a life" for the "WindAid institute"
Thank you for sharing your work. Unfortunately it seems like you have a very critical comments section. Everything you’re doing is a help to all of us whether they realize it or not. I’ll be watching everything you post.
@@sdjhgfkshfswdfhskljh3360 I agree helpful suggestions, constructive criticism absolutely do help. People bluntly barking out “what you should have done” is brash and often just frustrating. The comment sections often lack the constructive aspect of helpful criticisms.
@@sdjhgfkshfswdfhskljh3360 we seem to have a misunderstanding. I agree with you completely. It’s a matter of tact. So many people have a tendency to briefly comment about what the original poster has done wrong or should have done. In a collective mindset it’s useful for people to provide information in a meaningful way. Useful communication is helpful, intellectual posturing via short pointed comments on a RU-vid video not so much.
@@cheesynuts4291 why criticism should not be short? Sometimes such small amount of information is enough. And when it is not enough, author or viewers can ask questions.
One suggestion please, to improve efficiency one thinner magnet if kept behind each coil might be fruitful, i think one further trial is needed ??????? Though the effort you used is quite appealing and inspirational, thanks.
ok, just one question for all of your videos. Is there somewhere we can get the STL files, cause im trying to make a generator and no one seems to share their STL files
Really nice build. So many questions. Air coils no ferrite or iron core? I'm wondering the purpose of the carbon winding on the rotor? You are in a lab environment, what about an easy DIY fuel cell, for hydrogen, perhaps a pem or sofc?
would love to see what kind of increases you would get from using air bearings rather than standard ball bearing, they are simple enough to build now adays
Respectfully, I could be wrong in what i think your thinking. But I think you're making the mistake of looking at a coil and the interaction of a magnet passing under it, when you should infact be looking at the magnetic interaction of a coil and the magnetic fields of the magnets on either side of the coil. That's because the voltage peeks are greatest, not when a magnet is overhead where the the change in magnetic field and induced voltage is infact 0, but on approach or after passing when the magnetic field is changing the most and the voltage peaks are at their greatest + or - from zero. Secondly, segments of coils running parallel with the direction the magnets are moving do not produce voltage. Round coils have terrible copper overhang. A faulhaber winding maximizes the length of wire in a coil to producing voltage. You might find the axial flux faulhaber coil on the motor i made on my channel fascinating.
May I sugest using google images to see graphs of "flux linkage and EMF" You'll see maximum EMF is generated where flux linkage is zero, and that's due to it being the point where there is a maximum rate of change in flux. On the otherhand, where the flux linkage is greatest, you'll find the induced EMF is zero. That is because the rate of change slowed down to 0 at a peek flux linkage, where it generates 0 volts. After reversing the rate of change it begins to reach a maximum rate of flux change as it crosses zero flux linkage.
You might try this yourself on paper. Draw a n pole on the left and s pole on the right. And Draw The cross section of a single turn coil rotating clockwise. You know that when the when the wire is cutting across or moving at 90 degrees to the magnet, the wire on the left sees a voltage that pushes current into the page, and the coil segment on the right sees a voltage that pushes current out of the page. But, when the coil segments are on top and botom of the page, their movement is parallel with the field and creates zero voltage. Now that's one turn of a coil. Try to imagine a length of steel inside that one turn coil and i think it will blow your previous held intuition on when an voktage is generated on a coil inside a magnetic field.
Bonjour et merci pour ce retour d'expérience ! Selon vous quel serait le gain au niveau du rendement du générateur si le rotor était constitué d'acier afin de permettre la création d'un circuit magnétique ? Merci
Would a generator like this benefit from having the magnets arranged in a Halbach array? Halbach arrays are more efficient with the distribution of the magnetic field, and should, in theory, be better for power generation.
@@harribeydom Couldn't you stick thin rectangular magnets between the large magnets and construct an array that way? I would be surprised if there weren't standardized magnets that could already fit the needed form factor.
Very nice work ! Kudos ! One comment though: I realise that you are going ironless to get very low starting torque from the magnetic "cogging". But, why completely ironless ? Wouldn't being only half iron / half ironless on the stator/rotor (or vice versa) achieve that goal while keeping the reluctance to a somewhat lower level ? That could yield better perfomance for a given size/speed IMO (higher Kv) or get same performance with much smaller (cheaper) magnets.
@Evilgod Wow the amount of disrespect in that comment can only be equaled by your lack of knowledge and misunderstanding of the principles involved. First, the current produced by a generator is proportional to the RATE OF CHANGE of the magnetic field passing thru the coils. Increasing the pole count is a very effective way of doing just that. Second, The job of a magneto and a generator is very different so you should not expect them to be designed similarly, and they never are. Now go discharge your anger somewhere else, like at a therapist.
merci Dominique pour votre contenue enrichissant, j'aimerais vous dire que vous avez fait une faute quelque pars, pour que l'efficience ne soit que de 82% néanmoins je dois vous avouez que tout dans votre contenue étais parfait ce qui me laisse un peu perplexe quand à la solution vu que je suis moi meme + ou - entrain de travailler sur un projets similaire.. 1 abonnée de + dans tous les cas , et au plaisir de voir vos autre contenue en espérant que je trouverais la réponse à mon problème d'effcience :), bisous de Belgique
Most generators are 3 phase AC. You get a charge controller designed for wind turbines and it will rectify the current into DC. You then either run your house on DC (not normal), or get an inverter that changes it back to AC current. They do sell DC led light bulbs tho
I was watching you put glue on the magnet and I thought why not put glue on the plastic and slot the magnet in and then why no gloves? Then you started to do this, I said to myself why only one glove? then I said you will probably get the other glove and you did but it was a different colour, I am laughing so much but great video anyway 😂
I think a 3d printed generator would be more efficient 🤔 since it would have less drag/energy loss than iron with magnets. Or steel 🙂 as long as you have good bearings??? It should be reliable? Right? Should be.
Belle réalisation mais il y a quelques erreurs de conception sur votre prototype 1/ l’air gap entre les bobines et les aimants doit être le plus faible possible : l’idéal est de 1,5 MM 2 / la forme des aimants devrait être incurvée pour plus d’efficacité 3/ la forme des bobines de type delta aurait été plus efficace : la majorité des montages Diy d’alternateur d’éoliennes utilise ce principe
Love this. Have you considered doing some print-in-place things with the magnets? you might be able to reduce assembly by paising the print, placing the magnets, then continuing the print. This is one example: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-rk6MkW1eRiY.html
Why do you tubers make all these beautiful DIY generators without bothering to wind the coils around a soft iron core? These generators would be far more powerful if they made use of soft iron cores, which provides low reluctance and high permeability to the magnetic flux and would greatly increase the magnetic field strength and thus power output. I stand to be corrected but I have yet to see a factory made alternator or generator that doesn't wind the coils around a soft laminate iron core, whether the magnetic flux is axial or radial. If soft iron cores are not necessary, then why do manufacturers go to the expense of using them in generators and transformers and not just leave the magnetic flux to find its own way through the air?
I believe that this design aims toward the fact the small turbines might not have enough torque to spin the dynamo if it had an iron core since the magnets would be attracted to it making it difficult to rotate the core, so It aims more on lowering magnetic friction than power output.... could be wrong, but, I believe that this aims to minimize magnetic friction.
Yep, cogging due to iron core would not allow most turbines to start up in low wind speeds and axial flux generators with opposing sets of magnets keep the flux directly in the path of the coils. This radial flux model doesn't work as good as the axial flux variety
And then some more magnet to spin magnets that spin shaft and then some more magnet that spin this and than some more magnets .......................................................to infinity?
