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DIY induction stove – Frying eggs with magnets
- phoe-krk 8y agoThe easter egg that I love is the actual, physical reference to the Spaceballs movie. https://cdn.instructables.com/ORIG/FYX/9FR4/JNULHKMJ/FYX9FR4JNULHKMJ.jpg https://cdn.instructables.com/ORIG/FYX/9FR4/JNULHKMJ/FYX9FR4...
- anfractuosity 8y agoNeat! https://youtu.be/pCON4zfMzjU https://youtu.be/pCON4zfMzjU seems to use the same principle for levitation.
- deleted 8y ago[deleted]
- amelius 8y agoEfficiency?
- recrof 8y agolow. you're better to just use induction plate instead(which does not need any moving parts).
- pjc50 8y agoGood thing it doesn't produce more heat, their Lexan sheet would start getting very soft above 150C!
- dangerbird2 8y agoInduction cookers don't transfer heat to anything other than the dialectric pan. The pan itself would have to transfer heat to the sheet bellow it, and I doubt Lexan would be particularly conductive.
- raziel2701 8y agoDon't you mean conductive pan?
- martin-adams 8y agoI misread that as maggots. I recall reading that the heat generated by a mass of maggots causes them to break out in to smaller groups. So my initial thought was whether someone had figured out how to fry an egg by harnessing that heat. https://www.wired.com/2014/04/maggots-bring-the-heat/ https://www.wired.com/2014/04/maggots-bring-the-heat/
- jacobush 8y agoWith a series of heat pumps and enough maggots...
- dsfyu404ed 8y agoIf you have enough maggots you don't even need the heat pumps. https://what-if.xkcd.com/4/ https://what-if.xkcd.com/4/
- jacobush 8y agoYeah... it's interesting. XKCD is such a large body of work, (hehe) that for almost any discussion, there is an apt XKCD.
- jacquesm 8y agoWhich is why it would be great if people stopped linking to them all the time. I've called XKCD the smart persons reaction gif, and just like reaction gifs they are 'fun' in small doses but get extremely annoying in larger doses.
- jacobush 8y agoI think a problem is there is a constant influx of XKCD readers. These will find XKCD novel and feel a need to educate everyone else. XKCD is on its way to become a real cultural thing.
- IncRnd 8y ago
- deftnerd 8y agoThis is an interesting alternative to residential induction stoves that use AC to create the magnetic fields. I wonder what the power usage difference is. This style of heating up the metal instead of using AC current to generate electromagnetic fields could be better for "off-grid" scenarios.
- lawlessone 8y agoMight be very noisy though, and you're spending extra energy moving the magnets.
- varjag 8y agoYou are spending the same energy, plus a few percent loss on the motor's friction/inefficiency.
- bluntfang 8y agomind showing the math on this? i really can't see how converting energy twice (ac -> motor -> magnets) can only be a few percent difference in efficiency instead of converting it once (ac -> electric stove).
- varjag 8y agoUsing the electric induction stove and rotating magnets achieve the same effect: alternating magnetic field in a ferrous mass. Electric motors have efficiency up to 95%, and there's no further loss in this system. If you are truly off the grid, you'd come about even using the rotating magnets from mechanical power (say, an ICE) vs converting that power via generator and powering a stove.
- ahje 8y agoI'd prefer a regular wood-burning stove for that. Those can also double for providing heat.
- zczc 8y ago
- Already__Taken 8y agoIsn't this leaving a lot of magnetic field on the table (literally) where you could improve by directing the fields more into the pan and closing the spacing to the pan significantly?
- YetAnotherNick 8y agoIt doesn't spread the energy like heat, but the things which conduct will produce a force in the opposite direction of spinning, and that's where the energy is given. If there is nothing in vicinity, there won't be eddy currents, and no energy lost.
- lawlessone 8y agoDoes the same apply to wireless chargers? i was worried they would waste a lot of energy
- jeandejean 8y agoVery interesting indeed! But those guys could use some cooking lesson for frying eggs... :-D
- aaron695 8y agoCan it be run by manual labour?
- mhb 8y agoK&J Magnetics gave it a try: https://www.kjmagnetics.com/blog.asp?p=induction-stove https://www.kjmagnetics.com/blog.asp?p=induction-stove
- aj7 8y agoThis is a failed experiment that was posted.
- mannykannot 8y agoAs I have seen an induction furnace very quickly melt an aluminum billet, and this device works on an aluminum pan, it is not clear to me why induction stoves do not work on aluminum pans - is it because stoves work at a frequency that depends on magnetic hysteresis losses in ferromagnetic materials for generating most of the heat? Is it likely that this device would work better on an iron or steel pan than the aluminum one used?
- nraynaud 8y agoIt "fundamentally works", but it's so crappy that it doesn't work in practice: https://en.wikipedia.org/wiki/Induction_cooking#Cookware https://en.wikipedia.org/wiki/Induction_cooking#Cookware You are not crazy.
- linsomniac 8y agoFrom Wikipedia: "Most induction tops will not heat copper or aluminum vessels because the magnetic field cannot produce a concentrated current; "all metal" induction tops use much higher frequencies to overcome that effect." https://en.wikipedia.org/wiki/Induction_cooking https://en.wikipedia.org/wiki/Induction_cooking
- linsomniac 8y agoHoly cow! After some more searching I found only the Panasonic KY-MK3500 single-burner commercial cooktop supporting all metals, it's over two grand. na.panasonic.com/us/food-service-systems/commercial-equipment/induction-cooktops/panasonic-commercial-induction-cooktop That's a long way from the $40 induction hob I got for the camper.
- anfractuosity 8y agoThat's really interesting, I didn't realise you could get induction hobs that worked for all metals before. Would that would for stainless steel that's not designed for induction I wonder. Reading wiki it says "Stainless steel pans will work on an induction cooking surface if the base of the pan is a magnetic grade of stainless steel."