Induction heating - DIY Experiments #8 - Make an induction forge
Ғылым және технология
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• 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 ;)
Пікірлер: 479
La migliore presentazione sui circuiti riscaldatori ad induzione ZVS. Complimenti.
Fantástico meu irmão, parabéns! Gratidão pôr compartilhar!
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.
ज्ञान देने के लिए शुक्रिया आपका । Thank you for the knowledge .
I've been fascinated with induction heating ever since I got my induction stove
How great, verily educative & informative. Great video man 😎👍
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
@cdoatc1415
4 жыл бұрын
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 :)
Wow you're like the king of random but when they were actually good. I'ma sub right away!
wow. so great experiments.
your video was brilliant, great work.
@yteees2675
5 жыл бұрын
h b
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.
Super interesting !!!
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.
Great video. Well explained. Thank you.
Toujours en vie x)
This is a very informative and neat video on induction heating. *Like*
Excellent demonstration 👍
Muchas gracias.
Thank you for this great explanation it's through and very indepth. It is just brilliant!
Nice video and content. I got more knowledge about heat induction.
Cool project man
Thanks for this video regards from Basel
*_BRAVO, SUPER._*
awesome, hope you can provide more detail on the circuit and driver and challenges in building
@P4th2Freed0m
5 жыл бұрын
nickt looking up for ZVS
Very nice! I like it!
🙏 thank you
I just learned about inductors in some of my classes. Very cool
Seems like a great way to do tempering as well.
Thanks for the video! Are there any other instructions or details available as I would like to have a small unit like this.
Wow. So educational.
Awesome video! Subscribed
great experiments
Super, well done
Very cool!
It's like baaaam 😃 i love that stuff
Still, very educational. Knowledge is power.
Nice Video I equally love your love for destroying things ❤💯
This was a very helpful video
Very nice!
Excellent technology.
Very informative vedio
Thankyou for your education vidios
very good video, good explanation, like+subscr
Keep it up, thanks for sharing the video :)
Very nice it is wicked
Thank you
very good video interesting !!!
Cool!
Nice👌
Very good 👍
Wow amazing
Bien joué.
Way Cool.
Good video with explanation
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?
@altfurr7276
2 жыл бұрын
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...
The thumbnail looks like gold
Awesome if you can make it portable it would be great for loosening rusty bolts on cars!
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 ;)
Cool... easier to harden metal... i want this
It is very interesting expirment
Good!!
the cooker was interesting you should try to make another video of it cooking potatoes
@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
I love induction coils. I would like to build one to silver solder jewelry shielded by argon.
Replace with a copper tube and ads cooling system to reduce the heat of the coil
@mohamadarieffakri5140
4 жыл бұрын
how should i add the cooling system? you know any tricks? should the water flow in the tube?
@anmolkumar6704
3 жыл бұрын
@@mohamadarieffakri5140 use a mini water pump to run water through the copper tube while you also connect the coil with the circuit.
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.
Bonne vidéo.
Will you make a video on your diy power supply?
Very nice english gotta say I myself learned french but cant speak a single sentence... Like!!!
Love u bro plz make metal detector circuit. Nd part name
Good job
🤣🤣😂🤣😂🤣😂 The pencil sharpner chocked him✏️
Beaultiful Aways
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.
@jacobkaltz1958
4 жыл бұрын
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.
@jacobkaltz1958
4 жыл бұрын
If you build an induction heating coil big enough you will be able to melt your steel in a matter of seconds
@patrickd9551
4 жыл бұрын
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.
@waynegroves6922
3 жыл бұрын
@@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.
@patrickd9551
3 жыл бұрын
@@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.
If only I can do this some day
Damn this video is lit😅😅
new sub!!!!!!
Super mamari sir
intreating
Hi my friend Thanks for sharing Which mosfet using in this project? Tanks
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?
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!
@Preinstallable
3 жыл бұрын
If you dont know shit about electronics Athen i can only say 1 thing. *Don’t do this.*
@suryashakamuri
3 жыл бұрын
Listen to this person^
@SWRETURN
2 жыл бұрын
@@Preinstallable The most stupid human ussually think like this.
@Just1dead
2 жыл бұрын
@@Preinstallable He said he was not "good" and a fairly smart person will catch on fast with the right materials which he requested
I sub'd 😊
Finally
Nice
This is not a DIY channel but DIM channel ! Do it myself ! 😁
If we keep aluminum/tungsten in vacuum bulb with little neutral gas and apply the induction we can use it as bulb
@grazzydazzy57tm39
4 жыл бұрын
Neutral gas? What do you mean?
@jarret9438
4 жыл бұрын
@@grazzydazzy57tm39 inert gas.
@manikandanparamsivam5602
4 жыл бұрын
Photo for your statement, To gain some knowledge mb k.
@Preinstallable
3 жыл бұрын
However, it could melt it. Anyway, incandescent bulbs are more efficient than this mess.
@garnaiksonu9024
3 жыл бұрын
Nobody asked
ОЧЕНЬ КРУТО КЛАСС
Do you need a IGBT inverter control board?
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...
I wish to build one of these to melt silver? will it work for silver?
Could you power this with an AC arc welder? I would like to use this for melting aluminum for casting in molds.
@bubolzkm
4 жыл бұрын
You can power these with a TIG power supply.
สุดยอด
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.
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
This gives me hope that we can adapt all heavy industry to use electricity.
Very interesting video! I liked and subscribed! Can i know the name of the music in this video?
@DIYExperiments
5 жыл бұрын
Thanks! Which one? :)
@johnt4060
5 жыл бұрын
DIY Experiments The music that starts at 0:15, 0:53 and 3:28. Thanks! :D
very good my friend how do I get one of this you sell
@jacobkaltz1958
4 жыл бұрын
IVSON GOLD you can by a 1000w induction heating coil for really cheap
I need to know more about this Xbox psu you made. Did you just put 2 in series? I've been using 1 to charge my RC batteries for a couple years now.
@DIYExperiments
3 жыл бұрын
Yes 2 in series :) It's not "recommended" but it works well
5:21 Minecraft tnt sound