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Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
Buuuut aluminum isn't magnetic (it might even be slightly diamagnetic IIRC) and has very low resistance. So although you can induce large currents in it, you won't get hysteresis losses or much I^2*R losses. Things are always more complicated than one would like to think.
Registered Member #477
Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
Sahbin wrote ...
Thanks everybody, so first of all I need a psu, so can I use a computer psu with 300w output ?? is it enough to melt aluminium ?
Hey again Sahbin: I'll admit, I'm completely hung up on this "melt aluminum" goal. I could be reading you wrong, but to me this whole line of questioning reeks of "I don't care how it works, just tell me what to do." If you really *do* care how it works, then I think you'll be happy starting small. A glowing steel nail, perhaps The goal of a first project should be to affirm your own interest in the subject matter and develop skill in construction and debugging. A meta-goal would be to have something cheap and simple that actually works in the near term, otherwise you'll just get bored, run out of money, etc., and give up. There is no more certain recipe for failure than setting an unreasonable first goal.
Registered Member #95
Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
That's a good work around. Iron has a curie temp around 600C i think, which means that it becomes harder to heat because the hysteresis losses practically vanish, but it will have larger resistive losses than aluminium at any rate. But like Aaron says you can't expect to just melt metal by induction heating without any prior experience. Unlike SSTCs there are no induction heater kits available yet, so it's not something you can just slap together over a weekend.
Registered Member #1232
Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
The following companies sell ready built induction heaters and the sites have app notes which may be of more use if you don't have any knowledge of power electronics:
Registered Member #1549
Joined: Tue Jun 17 2008, 12:52AM
Location:
Posts: 9
Hello again, thanks for all posts, my first goal is to melt aluminium without fire, so I started to look around to learn how I will do it. I found a video on youtube about melting aluminium with an induction heater. I thought it whas something very interesting, and I began googleling. After some seach I found that it was not so easy to do because I don't know much on electricity. Each time I do a new project, I learn lots of thing not in direct relation with my project, and I try to understand it. The induction heaters are one of these "things" I found accidentaly and I whant to learn how its works. This is because I posted a message on this forum. Also I asked some help to my cousin because he knows much more thing in electricity than me. So to answer the question of Mr. Aaron, I was not interested on induction heaters first ( because I didn't heard about it) but now, I want to learn how it works. Its not the first time I try to learn something very far from my knowledge, and thats because I don't want to give up this project. Thanks to everybody. Sahbin
Registered Member #580
Joined: Mon Mar 12 2007, 03:17PM
Location: Melbourne, Australia
Posts: 410
ZVS? I tried that it only heated mildly warm compared to a fullbridge and a series capacitor (and manually tuned it with a current transformer+scope). maybe its because i am only using 12v? but i boiled a small can of water on 12v using method 2
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making an induction heater
The goal of a first project should be to affirm your own interest in the subject matter and develop skill in construction and debugging. A meta-goal would be to have something cheap and simple that actually works in the near term, otherwise you'll just get bored, run out of money, etc., and give up. There is no more certain recipe for failure than setting an unreasonable first goal.
