Induction heating - DIY Experiments #8 - Make an induction forge
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- Опубликовано: 3 окт 2024
- • Our Facebook page: / diy.experiments.youtube
• Hi everyone, today we gonna make a really cool experiment: we will use induction to heat metals. The idea is to produce a high-power electromagnetic field, that will induce a huge electric current in metals.
• To start we will reach the limits of our induction forge, and, as usual, we will explain how it works. For curious ones there is a detailed electric diagram at the end of the video. We test our machine; we notice that the consumed current increases immediately when we introduce metal in the coil, all this extra power is transformed into heat. First test: heat a big screwdriver, there it is, in only few seconds it becomes red-hot. We try bigger: a 50 grams weight. We put it inside the coil and try to maintain the current at 15 amps which represents a power of 360 Watts. In less than a minute, the weight becomes red hot and heats up to height hundred degrees; the coil doesn’t heat by itself, it’s mostly the weight that warms it up. It is very impressive to see such a hot object. We will see what we can do with aluminum foil. The thinnest parts become incandescent and end up releasing a very intense white light. Even better, we put an aluminum pencil sharpener in the forge; this metal has a melting point of only 660 °C, we can expect an interesting reaction; it doesn’t seem to like. For even more bizarre tests check out the end of the video. What if we tried to heat a kilogram weight? Because of the heat loss by conduction and convection, we can’t heat it red-hot but still, it reaches more than 300 °C.
• We will now explain briefly how our induction forge works. First of all, we need a system that transforms the direct current from the power supply into a sinusoidal current with a frequency near 100 kHz. For that, we use a simple but efficient assembly that we will present you in detail in another video about wireless power transfer. What happens in the coil? It produces an electromagnetic field, which, as it’s the case in a transformer, can be received by a second coil, which is then going to transform the field back it into electricity. The transmitted power density is so significant, that a single spin coil generates enough voltage and current to light up a car bulb. The retrieved current is very high, we can even melt a small wire that heats up with the Joule effect. You can imagine that a metal block immersed in the field is the same as a one spin wire on short-circuit with itself. The voltage is low but the current is huge, hundred Amps, which explains the heating.
• We are now going to make the link between our system and induction cooktops that you all know. We will also see if we can light a bulb using the electromagnetic field. The cooktop refuses to work if it doesn’t detect enough metal, so we place a pan so that the hotplate starts, and the bulb lights up. Obviously it wouldn’t be practical to place the pan in a coil. The transmitter is a flat coil made to heat a surface. We reproduce the induction cooktop, so that it will be clearer. You only have to roll up a wire and to cover it with a plate that resists to the temperature gradient. We tried with glass and we had a funny surprise. We add the small pan, let it heat up and we can, indeed, boil water in it.
• For those who want to make an induction forge, they will also need the power supply that goes with it. We are working with a very low voltage, which is safer, but high current to have a decent power. We made our own power supply 24V-18A by using 2 supplies from a first-generation Xbox 360.
• A little physics stop on what we call the Curie temperature. From a certain temperature, a ferromagnetic material is no longer sensitive to magnetism. We made a little pendulum that works with this phenomenon: when the metal rod is hot enough, the magnet doesn’t attract it anymore. Then once it’s cooled, it’s attracted again, this goes on and on. Why are we talking about the curie point? Well we find the same phenomenon in our induction forge. Take a look at the ammeter, the current increases slightly when the temperature rises, and then it falls down suddenly to a lower value when the metal is red-hot, only because it is no longer sensitive to magnetism. We understand that there is not only the electric current flowing in the metal which explains the heating, but also the losses by magnetic hysteresis for ferromagnetic metals until their curie point.
• Now we gonna overheat this electric motor while it is spinning. At first, it spins faster and faster. That’s it, it just “passed away”, and it is completely stuck. We won’t just stop here, we keep heating it up.
• Thanks for watching, hope you've enjoyed and consider subscribing for the next one ;)
Electric foundries have used induction furnaces for year. The coils have water pumped through and are encased in refractory cement. Each coil is separated by ceramic spacers. They quickly melt copper, aluminum, iron and steel allowing for alloying prior to casting. They also produce some spectacular molten metal showers when they short out and introduce the coolant into the mix.
La migliore presentazione sui circuiti riscaldatori ad induzione ZVS. Complimenti.
I've been fascinated with induction heating ever since I got my induction stove
I have been checking Induction systems on the internet for more than a year. I am looking for the best available able to be adapted for various applications. As far as I am concerned this is the best presentation yet. Congratulations! I miss one thing however and that is a PC board circuit layout, You do not show your assembly of the various elements in a useful practical way either to help guys like me to follow suite. Anyway your video is excellent.
What a great video that was showed schematics he spoke to us along the way tried a variety things very clearly proven high temperatures it receives through that system, truly is a treat not sure what they need these devices for but it was fascinating sincerely MacGyver
I had seen a similar principled device made by a German Company, the device is used for heating a motor shaft to extract motor bearings for replacement. Whenever you repair Electric Motor windings it is also desirable to replace its bearings with new ones, and to extract bearings on a shaft, you only need to heat it up by the use of induction heater just like this one. Amazing German Technology :)
ज्ञान देने के लिए शुक्रिया आपका ।
Thank you for the knowledge .
I like your approach of showing the cool stuff, then explaining it. When it is the other way around, a lot of times I skip the explaining.
Wow you're like the king of random but when they were actually good. I'ma sub right away!
awesome, hope you can provide more detail on the circuit and driver and challenges in building
nickt looking up for ZVS
Very good 👍
This is a very informative and neat video on induction heating. *Like*
Excellent demonstration 👍
your video was brilliant, great work.
h b
How great, verily educative & informative.
Great video man 😎👍
So... Are there any downsides to using an induction heater to forge metals - for knife-making basically? Am I missing something? This seems absolutely perfect for forging. It's just, from my perspective the only cons I can see is it looks like it sucks a lot of power and it can take a minute to heat metal to red/glowing - neither of which seem like that big of a deal since other forges require either gas (propane, oxy/acetylene, mapp, etc) or other fuels (coal, charcoal, wood, etc) and those still take a minute to heat too - maybe even longer. And the electricity usage isn't that big of a deal to me either. I consider myself to be on the intermediate level with electronics. I don't see why I couldn't build this and forge knives with it... I've seen these before but this one looks even simpler. Seems almost too good to be true...
Wow. So educational.
🤣🤣😂🤣😂🤣😂
The pencil sharpner chocked him✏️
Nice work, I can't tell what your accent is, are you French ?
Nice Video
I equally love your love for destroying things ❤💯
wow. so great experiments.
If we keep aluminum/tungsten in vacuum bulb with little neutral gas and apply the induction we can use it as bulb
Neutral gas? What do you mean?
@@grazzydazzy57tm39 inert gas.
Photo for your statement, To gain some knowledge mb k.
However, it could melt it. Anyway, incandescent bulbs are more efficient than this mess.
Nobody asked
Fantástico meu irmão, parabéns!
Gratidão pôr compartilhar!
Can you please make sure the instructions coming up on this are suitable for dummies with no electronic experience.
The only reason this is cooler than a 100,000rpm motor is because I am an amateur bladesmith and this is probably the best way to never over heat a knife. (i've burned a few viking knife tips in the past lol,) and get it to correct forging temperatures perfect every time.
8th sinner I am too. You are better off buying a 1000 W premade unit. You will be able to get bigger pieces hotter. Mine is even able to melt metal. Induction heating coil is the best way to go for small blacksmithing projects. Mine can heat three eights inch rebar cherry red hot in 45 seconds.
If you build an induction heating coil big enough you will be able to melt your steel in a matter of seconds
If you are a bladesmith you should invest time in learning to maintain a proper forge. Either coal or propane, maintaining your forge and it's temperatures is one of the key skills needed by a bladesmith. Yes, we've all burned an item or two (or more), but it's all in the process of learning. Most of the times I've burned stuff was because I was paying attention to someone else, but if I keep my thoughts at the forge I hardly burn any items anymore.
@@patrickd9551 Obviously, I'm late to this party, but I have a question. While I agree with your position on traditional forging skills, I'm certain the metal doesn't know the difference in how it got to that temperature - whether by a traditional coal-fired forge, by gas, or by induction. Noting that, I am also cognizant of the fact that you can induce metallurgical changes by the type of coal you use, or even certain coatings - something lacking with an induction method of heating. My question rests on these aforementioned methodologies as to which method has the best overall result in getting a chunk of metal up to operating temperatures in the most expedient and least work-intensive manner, discounting associated costs of operating each type.
@@waynegroves6922 Oh I actually don't have an position on traditional forging. Heat it any way you like. My actual point was that if you have a coal fire, you should learn to master it. Burning metal happens often for beginners.Getting to know your forge is simply a skill earned by doing.
Whenever I forge in my own fire I have no problems. However when I go a friends shop I constantly burn my metal (mainly because we talk too much ;) )
That being said, induction heating is a very specific localized form of heating. Great for specific jobs, not general heating like blades. It is fantastic though with 10kW units and up.
But cost being no factor? I'd say a good ribbon burner in a well insulated forge is probably the best way to go for general forging. Induction forging is really fast but you need to adapt your setup every time to the specific parts to heat in the right place.
Thanks for this video
regards from Basel
Seems like a great way to do tempering as well.
Replace with a copper tube and ads cooling system to reduce the heat of the coil
how should i add the cooling system? you know any tricks? should the water flow in the tube?
@@mohamadarieffakri5140 use a mini water pump to run water through the copper tube while you also connect the coil with the circuit.
Beaultiful Aways
Very nice english gotta say
I myself learned french but cant speak a single sentence...
Like!!!
Great video. Well explained. Thank you.
Thank you for this great explanation it's through and very indepth. It is just brilliant!
I just learned about inductors in some of my classes. Very cool
Hi my friend
Thanks for sharing
Which mosfet using in this project?
Tanks
good intervention
but the circuit diagram you did not mention what are the component used if share the values it can help full for projects
Thankyou for your education vidios
Awesome if you can make it portable it would be great for loosening rusty bolts on cars!
nice bro.i have 3000 watss induction now not heating anymore,the power on is okay the relay is okay,i take off the mosfte on baord and test still okay,what do you think the prob bro?
It is very interesting expirment
Are there any restrictions on the coil? Like turns and size
Very interesting. Do you know how much smaller can we make an Induction Heater? I see a lot of DIY chinese IH but they are still 5.5x4x2 cm for 5-12 V and 120W, and the 4cm width is a bummer for me. Is it possible to assemble an IH and make it smaller? It would be for heating pen like cylinder not above 220°C if that can help? Thanks anyway for the great videos ;)
That pencil sharpener met his demise. WOW.
This was a very helpful video
Excellent technology.
Cool project man
Good video with explanation
Good job
Thanks for the video!
Are there any other instructions or details available as I would like to have a small unit like this.
The thumbnail looks like gold
I thought this only worked on ferrous metals, but you are doing it with Aluminium too.
Does your hand get cooked if you put your fingers there?
This gives me hope that we can adapt all heavy industry to use electricity.
what is the voltage 3 volt ? because at 100A 300watt it should be 3
the cooker was interesting you should try to make another video of it cooking potatoes
Very nice! I like it!
Still, very educational. Knowledge is power.
Very informative vedio
I made a coil that uses 3000 hz 1000ah 48v and it vaporized a 6 inch thick chunk of an aluminum car wheel instantly. Can't show you how to build this one, its incredible.
Super interesting !!!
It's like baaaam 😃 i love that stuff
Nice video and content. I got more knowledge about heat induction.
I wish to build one of these to melt silver? will it work for silver?
Biigggg question.... yy does the circuit current increase when a metal is introduced into the coil
@DIY Experiment Hi, I have a question: Wich it's the brand of the screwdriver. Sorry for my bad english, I am from Argentina and I have at the same screwdriver
Nice video and content. I got more knowledge about heat induction.
Toujours en vie x)
This is not a DIY channel but DIM channel ! Do it myself ! 😁
I built per the schmetic, it sort of worked for a few minutes then then capacitors got very hot, and now it keeps buring up mosfets. What zenner diodes would need added and where would they go to prevent the mosfets from buring up. Also do you have your capacitors in distilled water?
Will you make a video on your diy power supply?
Hello this is a really nice video, I would like you to recommend me a book or something where I can read about the design of this kind of circuits.
I am trying to make a 2400 W, 24 V induction furnace but I am not good with the electronics. I know that the basis is an oscillator but, the components, frequencies, and so on I do not know.
Thanks in advance!
If you dont know shit about electronics
Athen i can only say 1 thing.
*Don’t do this.*
Listen to this person^
@@Preinstallable The most stupid human ussually think like this.
@@Preinstallable He said he was not "good" and a fairly smart person will catch on fast with the right materials which he requested
Bonjour , qu est ce qui se passerait si vous mettez un aimant dans votre four à induction ?
Keep it up, thanks for sharing the video :)
Muchas gracias.
hello, I want to play with this scheme too, please write me some details about the induction coil and the 2 50 mh /10 a coils
Is the difference between inducation forge ( spiral with hole ) and induction heater ( heating pan ) is the shape of the cable ?
That is the most gigantic tuna can I ever saw. 2:45
5:21 Minecraft tnt sound
I love induction coils. I would like to build one to silver solder jewelry shielded by argon.
Cooling water not need in copper coil?
very good my friend how do I get one of this you sell
IVSON GOLD you can by a 1000w induction heating coil for really cheap
Great video can it be used to dry up poop to turn it into fertilizer / power? How many kW of induction power is required to dry up poop INSTANTLY? How many coils will be required? I am thinking about pooing in a bag and then drop the poo into a vertical coil to dry it INSTANTLY Thanks again for your video.
🌺 ﷺ(( ❤️ םבםב ❤️ ))ﷺ 🌺 . أللَهمَ .صَلِ. عَلَى .محَمَد .وَعَلَی. آلِ .محَمَدٍ
great experiments
Can you put a copper tube threu it? And heat water for shower? End of the copper tube plastic and begin. So there Will be no current going to the shower
It would be an inefficient way to heat water whereas a for this application a simple resistor is way more efficient and cheaper!
And in all case even with induction heating there would be no risk of electrical shock :)
Hallo DIY Experiments
Dies ist ein sehr informatives und gut gemachtes Video!
Aber: die gate to source Spannung bei fast allen Mosfet´s ist +/- 20V!
das bedeutet, dass die Mosfet´s in Ihrem Aufbau sehr "gefährdet" sind!
Wenn Sie die Gate-Widerstände mit 9...12V versorgen ist dies Problem gelöst.
Außerdem kann dann die Leistung, die an den Drosseln (choke´s) eingespeist wird,
sehr variabel gehandhabt werden - bis 30V bei 100V-Mosfet´s.
Übrigens: diese Schaltung entspricht dem Deutschen Patent Nr. 35 19 489
vom 30.11.1989, welches der Fa. Hüttinger - Elektronik in Freiburg i. Br. erteilt wurde.
Damit wurden schon viele Geräte gebaut wie z. B. für HF-Chirurgie 50 bis 400W,
Dental-Labor mit ca. 3kW sowie Geräte zur Wärmebehandlung bis 50kW.
Thank you
Hi DIY Experiments! This is a really great video! so informative!
I am trying to build an induction heater like yours, but with a temperature controller. I thought to use a temperature controller that would read the temperature of the heated metal through a thermocouple and then change the current in the coils accordingly.
Do you know of any other more efficient process to control the temperature of this heated metal placed inside the coil?
i know this is old comment, but ill reply anyway :D
you could use thermostat with quick rise/fall. then set it to temperature you want and put the sensor on the metal you're heating.... but i would not recommend that, coz the fields could be a problem (i. e. heating the sensor itself) so i would implement SSR(or any other high efficiency switch) with microcontroller and IR temperature sensor. that could be better.
Hope you have a great day! and I also hope I helped you at least somehow...
what are the values or numbers of the 2 n channel mosfets used please any idea??
Awesome video! Subscribed
What is the inductor wire made of, pzz reply?
Very nice!
very good video, good explanation, like+subscr
very good video interesting !!!
Electricity is so scary but so interesting to me
Very cool!
Sir aluminum is diamagnetic material so how does it worked on induction
On induction cook top aluminium utensils won't work
As explained, there are two reasons for which a metal piece can heat with this forge: for ferromagnetic metal only there is hysterisis losses and for all metals (including alumium) there are Eddy currents! As there are both for iron it works better :)
Ok sir thank you 😊 for replying
I have one of those single inductive cooktops that was knocked off a counter and had a broken glass top.
I took the broken glass off with the intention of using the inductive hardware to make an inductive heater to temper metal with.
There was a sensor in the center of the coil I assume it's the sensor that tells the temperature and / or tells the machine whether there's a ferrous pot or pan on the cooktop.
I removed the flat coil and sensor and replaced the coil with a cylindrical one.
Then, put a piece of iron on the sensor that was in the middle of the original coil. Since it would cut off at 450f it's not needed for anything other than telling the machine there was an iron something or another present.
Turned it on and while all the digital things on the display indicate it's working, I'm not seeing any sign of heat from anything I'm putting in the coil.
I was out of time to play with it so I put it up.
Anyone have any idea what I may need to do or check to make this thing cook?
Thanks.
I wonder if a heat induction furnace could be built for smelting gold.
*_BRAVO, SUPER._*
Cool... easier to harden metal... i want this
Peut on s'en servir pour chauffer de l'eau qui circule dans un tube de cuivre sans danger ?
Merci de votre réponse
Very nice it is wicked