I can find very little new material on this subject but this old video nails what Im trying to do.https://youtu.be/oWiYsRi2Dss?si=K4El6hby4JjvzISpI am attempting to build the opposite, a motor that drives across aluminum.I have an aluminum strip now to test hypotheses. One attempt I will spin a disc with alternating magnets over the strip. The other attempt I am trying to build what is in this video.The spinning magnets is by far the easiest if I can reach enough rpm. The "linear induction motor" will be much more challenging. I am trying to scrap source a 3 phase inverter from a cordless device and wind the linear motor myself. The biggest hurdle will be that the total package can weigh no more than 4.8oz.I am attempting the magnetic disc tonight and will update. Any input on how to build a lightweight linear induction motor would be greatly appriciated.
Schematic
>>16916529I will not have the steel backing, but I think that only boosts the effect. Here a guy is demonstrating the shape of the stator on his linear induction motor. For that I was thinking of layering aluminum foil and paper, mashing it between 2 wooden blocks, cut the shape oversize in height, drill holes in it spaced the way I want the coils, then cut it straight across so it takes off the top 1/4 of all the holes. Cheaper than having someone cut all the plates.
I was hoping to have something rolling and motor driven tonight but this is how far I got. I have an Aluminum flat bar, 8"x1.5"x.125". I have an old armature with 10 neodymium magnets arranged alternating. The effect has a very short range so the gap needs to be tight. I can spin the bar with and without the aluminum and see the effect of magnetic braking. I can also slide the wooden blocks and get the armature to spin. Tomorrow I will motorized this and see if I can generate the needed thrust.
>>16916529Why would radial force develop? Am I getting something wrong when I am thinking of the FBI?
>>16916543if you remove the iron, you lose the induction, aluminum is a bad conductor of electricity so magnetic flux won't even form, iron or copper is essential to establish magnetic flux and hence induce current, why exactly do you need weight reduction when the stator or rotor can be fixed in place?
>>16916844>aluminum is a bad conductor of electricityThe utter state of /sci/
>>16916864aluminum foil compared to a block of iron, yes, what's your point pseud or are you just addicted to nitpicking without offering any meaningful input
>>16916868Ferromagnetism vs electromagnetic induction. Aluminum isn’t a good conductor. It’s a literal shit tier conductor at 60% higher resistance compared to copper, but damn it’s cheap. It’s used everywhere.
>>16916844 This is not correct.
>>16916958just use this setup >>16916532 , you can't bypass iron with aluminum if you want to establish a stable magnetic flux--the other pole to your electromagnet, and you can use the aluminum on top to improve current flow
>>16916982I thought he was gonna try to float with or use a halbach as a motor or in combination with some other type of array. Not really sure.
>>16916989yes you can construct some structure akin to a squirrel cage stator, but you can't do it with foil or wood--lmao, you need some solid plate, magnetic permeability--and iron has the best-- is very important here
>>16917031(turns out Bolsa, wood and aluminum foil are the key to hover cars)
based af thread, monitoring
>>16917031Thank you I was wondering about that. Full disclosure this is going to be to cheat at a pinewood derby race on an aluminum track, and double as my kids science fair project. Im limited to 5oz with block, wheels, axles and all components. Thank you all for the advice and I will keep you updated.
Works!
>>16917548you switched to permanent magnets, so now you can't control the speed or direction, but i guess it works for your humble usecase
>>16917548I simply don't believe this. Where is the radial force coming from? Just to be clear: you have some permanent magnets being rotated by a separate motor(a pull string here right?) along the drive shaft and that the magnets rotating over the aluminum causes the propulsion? I am supposed to believe this is generating some kind of sympathetic magnetic dynamo in the aluminum pulling the cart forward?This is unironically the meme
>>16917548based yung tesla
>>16917598I believe it is using the lenz effect for propulsion and the magnet wheel creates a series of invisible magnetic gears between the wheel and the flatbar.
>>16916529Yes you need a very small air gap.Also, generally Related technology application here -https://magnadrive.com/
