Induction Heater Construction & Operation

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This is my first attempt at an induction heater. The ultimate purpose will be to make glass capillary tube with an inside diameter of less than 100 microns, about the size of a human hair. This is to test the principle and clearly works as you can see the glass melting. Running only around 500 Watts. Several items were scavenged around the lab such as the oversize metal case and the heat sinks and variac.
The beginning slides show the individual pieces, then a clip of the system, then the power up and last, slides of the schematics.

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11 авг 2011

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Комментарии : 80

@IlluminatedWhiteGuy 9 лет назад

COOL VIDEO! I can't believe how much radiant heat that glass rod stood up too radiating from that nut! Witnessing the invisible forces at work from that angle and that scenario acting on different materials at the same time was pretty creative as opposed to most of the others that simply stuff a steel rod in the coil and crank it up...

@gortnewton4765 12 лет назад

Thanks for that detail. Of course with inductance and capacitance values known then the resonant frequency can be calculated easily and the inverter 'tuned' to that frequency. You've done a professional job of building your heater.

@Tywais 12 лет назад

Thanks for your kind words. The best version that I have is in the video "1.5 kW Induction Heater Finalized" Have operated it a lot and it is still working well and quite robust, not like the version 1 and 2 which were a bit touchy and too easily damaged due to not fully isolated from AC line power.

@LiveHappy76 12 лет назад

No Ron, not too much to ask--just waiting on *you* to make that video for the rest of us. OR how about *thanking* Mr. Tywais for working hard and generously and kindly to share with us what he *has* shown us? Thank you, Mr. Tywais. I'm searching for information to build my own induction heater to use for auto dent repair. Excellent work and thank you for sharing. Best of luck with your endeavors :)

@joshua43214 9 лет назад

I used to make tubes like you are looking for by the dozen even smaller than what you want. They are used as the bell in a micro-boiling point testers. It takes a few tries to get the hang of it. Stand a lit propane torch on its end, and roll a standard glass pipette through the flame until it starts to sag, then stretch it out to your full arm span. With a bit of practice, you can get about any size tube you want. Simple cheap, and laboratory grade.

@edgarmacabebe 9 лет назад

joshua43214

@HeaanLasai 7 лет назад

It's impossible to see all the writing and designations on the circuit board schematics at the end. This was uploaded at 480p, that's one pixel per letter. Please, please, can you link to the schematics? I'm really impressed with your work and I would love to sit down and look at the schematics!

@BelindaOkech 11 лет назад

woow.lovely video and well explained.amloving this coz ma hubby does a lot to do with this,and also with CNC machines and machine cameras.

@nicolaienvlad 11 лет назад

THANKS for technical info !

@Tywais 12 лет назад

The frequency was around 160kHz which is fully dependent on the coil construction, amount of capacitance chosen and the work piece (load). This is a parallel resonant LC tank driven with an inverter using around 150VDC. Resonant rising would give around 2-3 times that as the AC component (400-450VAC) depending on the tank circuit queue.

@Tywais 12 лет назад

@MrGunrilla You can get pretty much all the electronic parts, caps, mosfets, etc. from several online companies such as Digikey, Farnell, etc. The coil is standard air condition copper tubing. The PCBs designed myself and constructed in house.

@gristlevonraben 6 лет назад

Very smart person. I have a question, would you get more heat from a smaller copper pipe and a few more turns?

@hachiman69air 8 лет назад

Hello, interesting video. Is possible to use a similar version for make an electrical forge?

@samrockseagle 11 лет назад

pretty cool video. Now I know how it works clearly, I read some where before but was not convinced. Eddy current is generated inside the object under the influence of varying magnetic field, the object has high resistance by its nature and thus heats up (due to vibration of particles) in the process to dissipate eddy currents. Moreover I also learned that glass doesn't melt so easily. I was worried today, when I put a crystalized honey jar in boiling hot water. lol.

@_Junkers 7 лет назад

Nice work. How do you measure the phase of the tank circuit? Cheers!

@butterflygroundhog 9 лет назад

i dont know if you can answer my question but is induction heating a quite efficient method of heating metals? like if you had a coal forge and an induction forge, by joules spent before reaching the same point in temperature, which one would be the best?

@lucgyre9268 7 лет назад

wow nice work do you have the circuits available for it ????

@henkvanvuren3319 3 года назад

Hi, Just want to find out if the ground for the MOSFET circuit power and the ground of the IR2153 circuit power is connected together?

@Tywais 12 лет назад

I have a finalized version of the 1.5kW model and will be making a new video soon showing it pulling glass tubing at only 300-350 Watts. I was able to stretch the glass tube to less then a hairs width.

@H8edsinclair 10 лет назад

Any way to make this smaller to heat a nail made from number 2 titanium..

@bubusela6872 8 лет назад

where can i find the diagram of the circuit. I wanna make one of this and i see this isn't hard to do Thank you

@Andyrustyut 11 лет назад

I have a long experience in induction heating; both in building the heating units and also the apparatus to feed the components through the coil. I have a couple of videos of equipment I hade designed, built and commissioned.

@PrasetyoMuhammadDwiBiology 8 лет назад

can i made a mini version of this? i need to heat a 10 ga wire... educational purpose

@gortnewton4765 12 лет назад

That's a very nice induction heater and it is well made from loose items around your workshop. Do you know the voltage across the coil and frequency please? This is important to me as I would like to build an induction heater too.

@Tywais 11 лет назад

Actually, because the MOSFETS are operating in saturation mode (switching) it is more like a class E amplifier. Nothing is biased in the linear region as in a Class A.

@einspace2007 11 лет назад

Can you tell me where to find the inverter schematic? I can't see clearly the details. Thanks.

@moeezamjad7864 6 лет назад

Sir can you please send me its schematics...you have done it very well..

@dancoz5477 2 месяца назад

Imposible to read the schematics. Can you post a readable version of the circuit schematic plz?

@Tywais 12 лет назад

This was not a hobby project but was designed for a PhD student's research work which has deadlines. We just submitted a publication for the research project and its results. I hope to be able to find time to put together a detailed website on the construction, data and required components. Currently starting work on Quantum Atom (super cooling) project using precision lasers so fairly busy still. ;-)

@warrenkeillor9034 4 месяца назад

I find this experiment very interesting in that you are heating a dielectric substance. This may indicate broader applications. The fact that a mere 500 watts is being consumed is impressive. It makes me want to rush to my studio and explore this phenomenon. Thank you Cheers Warren

@yiyozarco 9 лет назад

thank you very much, but you could put in medifire schematics as did the project. I appreciate in TOO

@vukasim 12 лет назад

is it possible to have a shematic design, step by step ?

@wellingtonvalenzuela5210 12 лет назад

muy bueno el diseño pero yo nesecito el circuito para realisar uno en casa pero no concigo el diagrama para relisarlo ni el tipo de piesas tanpoco las numeraciones necesito el diagrama para aser uno a 24 voltios

@Tywais 11 лет назад

This class heater, no, as it operates off high voltage (300VDC) allowing lower current to be used. You can do it with a Royer induction heater design using the 12VDC in the PSU (see my Royer video). A mid tower PSU is about 25A at 12V so around 300-350 Watt capability which will give you a pretty good heater. A Royer is very simple to build compared to this class heater.

@wgatis 8 лет назад

Como consigo esquema deste indutor?

@blakreign454 11 лет назад

I'm thinking of making one fora class project and would like to know the approximate cost of all the materials.

@MrGunrilla 12 лет назад

where can you get the stuff from

@RedOrion1985 11 лет назад

From your drawings this looks to be intended for glass only...you think you can use it to steam water and connect to a tubine and alternator for electricty...maybe you can beat 500w?

@lpnadie9986 6 лет назад

..no veo el efecto de calor por radiación y convección sobre el aire alrededor de la tuerca¡.., el borde del soporte de vidrio es nítido¡¡

@RedOrion1985 11 лет назад

Not 500w...I confused this with a different video. Can you beat the amount of power need to run it with a turbine?

@ricardosetteborges 6 лет назад

plant available for download please

@Toto-ko5on 6 лет назад

On this case final temperature is about 800C = glass melting temperature and metal color.

@Toto-ko5on 6 лет назад

Thats corect. 850c is more precisely. Maybe Farenheits...but he write Celsius.

@diegoadonaynapomuseno2262 10 лет назад

congratulate excellent job and I would like you to send me the diagram of the video not decipher achievement I'm going to thank a lot

@joshmorton7373 9 лет назад

Can you add a variable capacitor to change the frequency of the circuit if you put in parallel with the other tank capacitors? I have not seen anyone do this I thought it may work old school instead of building an entire timing circuit

@Tywais 9 лет назад

There is quite a bit of energy going through these capacitors and you would need a high voltage, rf type cap which is expensive. Simplest induction heater is the Royer type I showed in one of my videos.

@GSELECTRICALWORKS 8 лет назад

+ Josh Morton hello sir i want to make a induction heater similar type working on 220 volt for purpose of brazing or heat-up of larger bearing plz suggest me the procedure to make it

@MrTkHussain 9 лет назад

its good but the drawing and list shows grey scale instead of black & white or colored hence its hard to read

@Teppei9asone 10 лет назад

Schematic of your inverter board please?

@odouls779 6 лет назад

The glass tube is non-magnetic and can not be heated by magnetic induction. The glass tube was heated by conduction from the metal nut heated by induction. Try using microwave to heat glass.

@jonatan01i 6 лет назад

0:40 Isn't it 4.5 turns?

@TheElectronicGeek1 10 лет назад

Also whats the purpose for the inverter board?

@Tywais 10 лет назад

The inverter board is to convert DC to AC (high frequency). Similar to an inverter that you can plug into ones 12V lighter socket in a car and get 110/220 VAC out. But in this case much higher frequency of around 160kHz rather than 50/60 Hz

@TheElectronicGeek1 10 лет назад

How excactly will you get 300V if wall sockets are only 120V?

@Tywais 10 лет назад

This is in Asia with 220VAC. Converting 220VAC to DC is 220V (rms) x1.414 = 311VDC

@dracwula 10 лет назад

Step up transformer

@chenz089 9 лет назад

in australia we run 240v straight from the wall

@greybeard9x44 6 лет назад

It's a real shame that his schematic diagrams at the end are too illegible to allow one to read them. If he could just be so kind as to put up another short video of these in a readable form I would be so grateful.

@ApostleRon 12 лет назад

would it be asking too much for you to have actually assembled this for us to see? Dosent anyone know how to teah anymore?

@WaVeInFoRm 11 лет назад

so its like a class A audio amplifier, but with a few less components....

@Tywais 11 лет назад

Would be very inefficient as you are converting electricity to electricity. Every point in the conversion process will have losses. If the Induction heater is 90% efficient, internal power losses, then the power to the load then load to the water then the losses in the mechanics of turning the turbine then the losses in the turbine. May be lucky to get 20% efficiency out from input electricity to output. My other heater runs up to 2500 Watts. Could use it in a tankless water heater.

@reftri 10 лет назад

How much would you sell me one of this?=)send me a inbox with the Price,,,thanks and have a nice day,,

@Misterasianweeman 11 лет назад

if hollywood ever does a remake of the lord of the rings where everything is in the future, this is how the ring of sauron should be forged.

@geoffhoweth 11 лет назад

pause at 5.01 its a me mario

@_P0tat07_ 12 лет назад

That red is so bright an flat it looks photoshopped

@81carlosortiz 12 лет назад

loco

@walterbunn280 7 лет назад

Mmm... induction heating is not good for this. If you were trying to make a stainless steel capillary tube that would be a different story, but if you're just trying to use electricity to melt glass use a microwave. IF you want the heat to be generated specifically in the glass, tune the microwave to those specifically absorbed by the glass. Note: i am not sure what that is. probably something in the 1800 nm wavelength. you will have to do math the convert nm wavelength into microwave frequency.

@Tywais 7 лет назад

Sorry but will have to disagree. A microwave isn't going to do anything to glass. Think about it, glass is a common carrier in a microwave oven to put in to boil water plus the rotary plate is glass. If you look at my other video you will see that it worked very well and was included in a research publication. The capillary ID was less then 50 microns, the limit we could measure. BTW, 1800 nm (1.8um) is not microwave but infrared. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-s5XTeSIFtJM.html

@walterbunn280 7 лет назад

Yes... I see the other video and got from this one what you were trying to do. If you got paid for making the capillary tubes, more power to ya, but at it's most basic you're still getting something else super hot and then allowing convection to transmit that heat into the silica. I wasn't speaking out a place of ignorance. If you see increases in efficiency, it's because Iron is a major contaminant in silicon dioxide. Not because inductive heating is specifically good at heating silica, but because it's heating something that's hard to get rid of in glass. If you spend alot of money making iron free glass (which is a thing for medical applications), you're not going to melt your glass tube in an iron crucible. Standard Microwave ovens with little modification can be made to do something similar to what's being described above simply by using graphite and graphite paste on ceramic goods. It doesn't introduce iron and is comparable in efficiency and speed to what you're showing here. That said, glass is used in a standard microwave because the microwave isn't specifically tuned to interact with it, however, microwave emitters can be adjusted to output different frequencies which would interact with silicon dioxide. We simply don't use those frequencies in our home products so you'd have to construct the cavity magnetron from the ground up (a cavity magnetron is the easiest way to make a microwave emitting device).