How To Make A Simple Induction Heater ~ FULL explanation & schematic
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- Опубліковано 25 сер 2024
- Learn how to make a nice, and fairly simple Induction Heater that can be used to heat treat tools and much more. See the link below for the schematic. Enjoy!
This device will heat a screwdriver tip to glowing red in approximately 30 seconds. The coil design can also be modified to a pancake style just like what is used in modern electric induction cooktops. Follow ALL instructions in the video, and link below. Depending on how your unit is made, results may vary.
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Resonant Frequency Calculator is here:
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Use this tool here to calculate your working coil inductance value:
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12ga copper wire is 2.03mm.
*Watch PART 2 which shows a spiral coil and current measurements!*
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Try and keep the design UNDER 225khz to help avoid heating problems. Increasing input voltage speeds up heating, but also causes the capacitor and other components to heat up faster as well. If you can only locate a current limiting inductor(toroid) greater than 2mH, then pull off a few turns of wire to lower the value.
BE SURE TO CHECK OUT PART 2 HERE:
(Shows a Spiral/Pancake Coil in Operation)
ua-cam.com/video/8WzoRYUOrxc/v-deo.html
*****
Unfortunately I cannot assist you with such a dangerous project. 3Ph/380V is deadly. I suggest you stick with what I show in the video. If you wanted to use a transformer with more current output, or slightly higher voltage, that would be fine. Make sure the components are rated to handle the higher level of current / voltage.
Thanks For Watching!
*****
You are only 1/3 right. I am from Long Island, but 100% Italian, not Jewish, and the video was filmed on an island in the Bahamas. I have no idea how you arrived at me being Jewish because my hands are tan and I was inside a bright room. LOL
+PrognatusSeptem
Yeah, I can usually nail down that LI accent as well. I can even get Suffolk and Nassau differences most of the time.
Don't forget to check out my extensive video list.
Thanks For Watching!
what happens if you stick your finger in?
LOL. As long as your finger does not have a ring on it, nothing.
Aayam Sharma You're finger won't melt. Unless you have metal attached in it.
what about the metals in our blood, like iron?
It's not affected, even it's iron because blood is not made up of just iron. But red blood cells and plasma dominates inside our bloodstream
En una oportunidad vi un inductor para derretir oro,lo hacia en menos de un minuto,no tenia idea como funcionaba,ahora con tu brillante explicacion estoy claro como funcionaba,muchas gracias.
On one occasion I saw an inductor to melt gold did in under a minute, I had no idea how it worked, now with your brilliant explanation I am clear how it worked, thank you very much.
I used to work for Pillar Industries. We built custom induction power supplies and robotic handling systems for everything from bolt hardening to steel melting and annealing to growing of silicon for silicon chips. This is a great small scale induction heat treating device. Thank you very much for the build, demo, and your time and effort to bring this to all of us.
+MisterFreedom
You're welcome! Please be sure to share my channel with others, rate thumbs up, and check out my video playlists. Thank You
These things are great for getting a small metal shard out of your finger. I maintained a 400 amp unit in a machine shop. That thing was a hard worker, Had to use 2 $2800 vacuum tubes for the high frequency generator. Very good video! Thanks
Thanks For Watching!
I love to be able to design electronics as these guys make it look too easy.
Well done.There is another variant of this circuit that uses no center tap. A lot of the Ebay ones are like that. It makes it a lot easier to swap coils, especially if you want to use litz wire for the coil and wind it around a frozen tie rod nut. I like your power supply. MOTs are getting to be like duct tape; they use them for everything from spot welders to power supplies.
Ive wandered onto the part of UA-cam with intelligent life... Greetings.
Excellent project: perfectly explained and good steady camera shots.!!!
For a person (me) who does not know electronics -you showed the details well- thanks.
I'm interested in making a induction type water heater for home hot water- for efficiency
reasons.
Thanks again, look forward to more. Three cheers, many posters could learn from your excellent demonstration style. !!
Thanks Greg.
Although I got here too late. I still appreciate this information.
Please, how can I use such induction for dc cooker?
Induction heating like this, but on a significantly larger scale, is used commercially for hardening metals such as steel. If done correctly, your induction heater could be used to case harden all your screwdriver tips. Great video as usual.
After a lot of Searching I got This & What, I loved it.
kiran ranjitkar Great to hear! :-)
Brilliant explanation and video! I really enjoy this allot!!
Glad you enjoyed it!
nice :) Hardened screwdriver's tips in every home :)
CRACK !!! BANG !!! WONDERFUL !!
Congratulations on your video. You are very confident of what you say, your voice indicates that you are still very young and already have a lot of experience. Your sequence is logical and well projected. You will make an excellent power conversion lecturer. I see that you are so conscious of the punishment that capacitor takes.
Congratulations once gain.
The other day I asked my students how come a switching device with a low output impedance when switched on, can match an parallel LC circuit which has a high output impedance when resonating which this circuit is doing. NOt a simple answer!
Thanks for watching. I appreciate the kind words. I'm not exactly young. :-). I have very good genes(look much younger than my age, act young, sound young), but I am 41.
nice build , good clean work, looks like a very neat little unit. did you no farm suppye stores sell 1/8 inch copper tubing niot nominal size but actual 1/8 inch diameter , super small but it would allow ypu to pump water threw your antenna
The best DIY induction heating video i've seen. It is the proove you don't need fancy blown cameras, video edditing software and plenty of time to make a piece of GOOD VID!:) Thank you.
Glad to hear that! Be sure to share my channel with others, rate thumbs up, and check out my video playlists. Thanks
Very interesting. You did a great job presenting this
Thanks Richard! Be sure to share my channel with others, and rate thumbs up, :-)
I've watched several videos about things like this, and they all are fascinating and informative. But I think this one sounds the most useful for understanding the principals of it. I want to do certain kinds of craft work involving metals, and I think it would be very useful to have one of these. I look forward to putting this information to use. Thank you for sharing.
I finally got mine to work, to some extent. The first try failed because I made the mistake of mounting both transistors to the same heat sink, which shorted them out. I have it rebuilt using IRF3205 mosfets. But it's really hard on power supplies. I burned out one, and then tried to connect it to my arc welder, which has a bridge rectifier attached. That was too much, it melted the feed wires I used. But before it did, I stuck a screwdriver in the working coil, and I could feel it humming, and that seemed to increase the power draw until my wires melted. I'm putting together a smaller power supply, I can't wait to see what this thing will do.
UNITED POLICE STATES OF AMERICA Sounds like you are certainly having fun experimenting. :-)
Great video! I do automotive work. Occasionally I'll need to heat nuts or bolts to get them loose. My propane w/ oxygen torch works but things close by or next to the fastener being heated sometimes gets melted or damaged. I'm going to try building one of these instead of purchasing a $500 to $2000 unit that's already made. Thank you for sharing.
Glad you enjoyed the video! Just make sure you center the bolt in the coil. Be careful not to hit the coil with the bolt you are heating.
electronicsNmore Can you give me the specs of the capacitor and rectifier after the microwave oven transformer and a diagram or explanation of how it's connected? Thanks.
Yes. as I stated in the video. :-)
I admire the effort you put into making your circuits and also the way you explain the theory.behind the operation. You could teach in any military electronic school. You present the material clearly and evenly. Thanks for your videos. I always look forward to them.
Thank you very much Allan. I'm glad you like the videos. Please be sure to share my channel with others. :-)
Great video thanks
Your Welcome. Be sure to check out my video playlists.
is it true that these coils are very size and frequency depended as far as optimum performance goes?
Outstanding video.
+Gary Doss
Glad you enjoyed it! Be sure to check out all my other videos(Including Part 2), rate thumbs up, and share my channel with others. Thank You
Glad you like it. Tell your friends, share the link, and subscribe.
Thank You.
Using Litz wire, if you can find it, or just bundled fine-guage enameled magnet wire, rather than solid wire will reduce heating of the coil and increase efficiency. It will also allow for higher frequency. Search 'skin effect'.
Thanks you
You're welcome! Check out my other video showing a store bought version in action. Thank you
ua-cam.com/video/wUS6wBxJd0A/v-deo.html
If you put a conductive pipe inside the coil, and another conductive wire inside the pipe, would the wire be heated?
can we directly operate it on solar panel without batteries, charge controllers, transformers, inverters?
Okay, I hope that you can help diagnose this problem. The following is a list of what I have done and the issues I have had:
1) PS (MOT) puts out 24VAC once new secondary is wound. Add the rectifier and I get roughly 24VDC. I added the capacitor (3300uF/25V) and when I went to read voltage it blew. I assume this was due to the voltage limit.
2) Unwound some coils from secondary to drop voltage to 19VAC. With rectifier I get roughly 19VDC. This time, I put 3 1000uF/50V caps in parallel under the rectifier. Read voltage and was getting in the range of 30VDC. You mention that you get 19VDC and that get sent directly to the working coil.
3) In the same set up from number 2 I decided to test the voltage coming out of the 7812 and I got 24VDC. I should be getting 12, correct? This blew a mosfet and a diode.
I am sure I am making some novice mistake here, bit I just can;'t quite put my finger on it. Please note that I am being safe and taking the precautionary steps. I would appreciate any advice. Thank you!
+jesse harris
Hi Jesse. Your MOT output voltage is too high. Please watch my other video below to understand why converting from AC to DC raises the voltage output.
Thanks
ua-cam.com/video/9GvlGUbiPRo/v-deo.html
I have noticed that the center tap of the work coil seems to make a bit of difference in heating time. The time seems to be a few seconds slower when it is wound as yours is i.e. not soldered near the coil surface, but twisted, giving loop(s) in the connection from the work coil to the circuit (stray inductance due to a 'third' stray coil)?? I am not sure.
Unusual, don't know why.
Thanks very much for a very good and informative video. The circuit looks like those that drives flyback transformer for creating high voltage. Can probably buy the same parts and build two things at the same time :)
very nice technology for heating and melting
Sure is. :-) Thanks for watching! Be sure to check out my video playlists, rate thumbs up, and share.
I'm looking for the most efficient way to keep 20 litres of water to about 40C for about 8 hours. Any help would be appreciated. the water will already be 40C to start with and the water container is highly insulated.
It's great video
Glad you enjoyed it
Can I use npn transistors with this circuit? I have a few 2sc2526.
could you consolidate alot with 1 diode rectify, 1 heatsink and resistance wire? On a different note, the yellow cap at .47 works great to send a good small signal to a cars tachometer, off a big coil (they are found in computer power supplies) ;o)
I save my junk too, learning as I go along, great video.
i only got a thoroid 23m outside dia. 13mm inside and depth of 10mm and scrap of IRF740
How many turns of wire and what gauge should i use.. i am not an electronics guy.. just a fan of DIYers
i am a mechanical contractor usually fabricates anything that burns and heats and this would be a good tool for me... thank you for sharing.. more power to you
very good
Excellent!
Paul Skvorc Thanks Paul. Glad you enjoyed the video. Please share my channel with others, and rate Thumbs Up. Thank You!
What would you do to incorporate the induction heater for use in heating a large room ??? Maybe you could send your idea would be appreciated.
A couple questions if I may: How many amps are you drawing on the low voltage side of the supply? And have you checked the frequency when you were heating an object? It should change.. Im curious to how much change... one last question... the circuit is self-oscillating... what if you were to use an audio frequency generator to vary the frequency manually? I will be building this experiment soon and trying these ideas.. but was curious if you have already tried them? Tnx and Merry Christmas
could u just run the coil from the transformer or do u need all the other parts?
great job
Thank You! Be sure to share my channel with others and rate Thumbs Up.
How much is the consumption of both Mosfet at the moment they are working?, I get the IRFP064N, it is 55 volts/110 Amps, and I get another IRF740 with 400 volts/10 Amps, what do you recommend me to use?
IRFP064N should be fine.
Nice. Thanks.
+I.C. Sezdablindman
You're welcome! I have lots of excellent videos on my channel. Be sure to check out my video playlists, rate thumbs up, and share.
Thank You
good job
+Joaquim Matias
Thanks! Please share and rate thumbs up.
This looks really cool, useful, and easy to make. I don't have a lot of electronics experience and wonder if there are any safety issues to be aware of when building and using this. thanks. great video
Thanks For Watching. If using a 120V transformer as a power supply, then a potential shock hazard exists, you can also cause a fire with the heating, possibly short out the working coil, or possibly explode your capacitor due to excessive operation time/heating.
would this principal be efficient enough to make a induction style water heater? I realize the pipe would have to be made out of iron or Ferris material, just a thought
Thanks for sharing
thanks for sharing this video, you make great tutorials!
Glad you liked it. Be sure to share with others. Thanks.
Great Vid. Thx.
Your welcome! Please be sure to rate "Thumbs Up", share with others, and check out my other videos as well.
Fantastic. Thank you very much for this tutorial. Keep them coming.
Do the 2 halves of the working coil, (the portions above and below the center tap), have to be wound in the same direction, or could one of the halves be wound the opposite direction than the other?
+uiticus
Wind exactly as shown in the video, or how it is shown at the link in the video description area. Thank you
thanks for fantastic video.
how big was the eddy current on the work coil?
thanks for sharing...
this is awesome.
Hi sir.
I try to build the sample of you. I use mosfet 50N06, cap 105. But mosfet die and very hot. Bum. Power supply is acquy 12V 100Ah
Can you help me?. error where ?
brilliant...
Thanks.
In your video, I sow the two capacitor & the total three mosfets.. But in the schematics you use C1 one capacitor. Where i connect the C2 & T3..pl reply
No. Only 2 Mosfets. The other one is a VREG. The other capacitor is used in the rectifier circuit from the power transformer.
the heat in the cap is because it have a resistor or a diode built in. try with. mica=plate capacitor. they are made for rf and high voltage.
thus the circuit work in optimal conditions. heating the metal faster and more
Damian Molina sorry for my english is lame
The capacitor has no resistor in it. Your thinking of oil filled run capacitors. The current and frequency is causing it to heat up.
nope. this yellow capacitor are mpx or rc. just tell me the model and the letters. some have a little diagram showing the inside of the component. mica capacitor is the chosen one. you can find this in old tv or vacuum tubes radio electronicsNmore
I just tested that exact capacitor. If there is a resistor inside it, it is extremely high in value. OVER 20M. I also pulled up the spec sheet. There is no internal resistor. I have no idea why you think there is an internal resistor. The heating is caused by frequency and current.
pls Mr. electronicsNmore, i really need help. i need to pass an induction heater for my electromagnetics course. im a student. im having trouble with the capacitors...what are the ratings??? and i could hardly find a polypropylene capacitor....
Very cool ;)
Hello how can I get the wiring diagram of the forge?
we can produce endless amount of energy and clean water by electrolysis of sea water then take the hydrogen alone to high attitude where we combine it with atmospheric oxygen and drop the water on hydraulic generator from this high attitude as in dams
I wonder if it's possible to use a larger diameter coil, or do I need to use different parts for a larger coil? any suggestions? I enjoy watching your videos, keep it up.
+Jeffrey Yeager
Hi Jeff. Yes, you can. Please refer to the link in the video description area. Thanks.
+Jeffrey Yeager
Hi Jeff. Yes, you can. Please refer to the link in the video description area. Thanks.
+electronicsNmore great thanks
I wonder how far this would transmit on longwaves if you substituted the coil for a much larger diameter one on a wood frame with only 2 turns. This then would form a magnetic loop antenna excited by the oscillator which would have its frequency of operation determined by the magnetic loop resonant frequency. You could even change the capacitor to bring it up into the am broadcast band. After trying 300kHz LW I would try 800khz MW just to compare the difference. I also have receiving mag loops I have made... Hmmm I feel an experiment coming on :)
Nice quality video easy to follow.Thanks.
Thank You!
Can this heat up iron rebar so it will bend without breaking the rebar?
Sure, but with modifications. The gauge of the working coil needs to be much heavier(probably #8 or #6 for 1/2" or 5/8" rebar). You also have to make sure all your circuit wiring can handle the current being delivered. I would use IRF3205's.
Thanks For Watching!
If I use the same circuit with a working coil that is half the size will it have half the power?
+seth If you change the frequency what will happen?
I wonder if that would work for soldering copper pipe?
yeah, they make small portable ones that are made just for that
why would any one dislike this video.
So...why not a large coil inside the walls of a cylindrical room filled with sea water heating an element within which boils the water producing steam for power? The electricity necessary to do so greater than what would be produced?
Entropy
Hello! i see in comentaries there is more people who asked but in the part 2 of this video. Is possible to make a forge for knive making with this induction heater?
+Abel Villarreal
Depends on the unit you make. Larger coil, more current, yes.
So the output from the transformer or input into the induction apparatus in DC. Right?
Yes. The mosfets create pulses in the working coil.
could you please specify how did u calculated L & C for the required application
Refer to the link in the video description area.
electronicsNmore thank u
Hello! Could you please explain how you center-tapped the working coil? I'm unable to figure it out. Thanks!
Very simple to do. Have you visited the website in the video description area? If you visit that link, you will see how each 1/2 of the coil looks.
Thanks For Watching!
hey! thanks a lot!
Your welcome
always enjoy your videos. thank you for sharing
Thanks for watching! Be sure to rate thumbs up and share.
Thank you, great explanation and detailed.
Glad you enjoyed the video!
Hi copper pipping with water flowing through it (placed in the centre of this modual. use for hot water for shower. Guessing i may need more than one of these. new to this type of electronics. any tips or advice. Thanks in advance .
You would need a flow switch sensor. I would find a broken tankless water heater and play around converting it to induction instead of resistive heating.
Fascinating stuff. Good work.
+Graham McDonald
Thanks! Be sure to share my videos with others and rate thumbs up.
Could I use a car battery as a power source? How much current does it draw?
+Aleksandar Šuković
Yes. Please watch Part 2 for current measurements and more. Thanks!
it is called the yellow box and I ask how or where, in order to get one?
Can I use this to heat my lunch?
If your lunch is made of metal. But if you really wanted to. Yeah
You are Real Steel, lol
It doesnt matter that the copper wire have or NOT isolated with resine in the moment when twist the wire?
You use a copper wire WITHOUT insulation. The insulation would likely burn off if you did use the induction heater for a longer period of time.
Thanks For Watching!
Os homens sabem bem pouco do que a energia eletrônica é capaz, a energia está em tudo oque oscila vibra e treme com frequência. A energia elétrica; montada adequadamente é capaz de se auto sustentar.
Is it possible to substitute a couple of those 100A IGBT transistors for the mosfets in order to scale it up?
UNITED POLICE STATES OF AMERICA Even though IGBT's have similar characteristics to mosfets, I would stick with the mosfet. You can use IRF3205's which are rated 110A.
electronicsNmore Great idea, I just ordered 10 of them! Another little question, can I use the capacitors from microwave ovens? I have a bunch of those. Or how about a motor startup capacitor? I built an arc welder out of four microwave transformers, that I run through an MDQ200A bridge rectifier since I have a bunch of d/c only rod around. It makes about 49 volts d/c, and well over 100A, I intend to use that to power the ZVS, I have a 100A circuit breaker around here, too, I'll include that to keep it from overloading anything. This is going to be interesting.
No, they heat up much faster. I already tested it. Stick to what I suggest in the video.
thanks...
do you think a camera flash circuit would work as an induction heater if you could keep it from burning up?
I was curious, as to what the actual voltage would be when powered up across the induction coil itself? That is, from the mid-tap to each leg out to the mosfets?
Also, great job on this video!
+Mysimplefix
Hi there. Please watch Part 2. I give current measurements, as well as use a flat spiral working coil.
Thanks
electronicsNmore thanks for responding. Yes, I did watch the second video too, but there were no "voltage" readings for the secondary winding. . I was curious as to what voltage there may be from the midtap to the mosfet connected ends?
Unfortunately this device is in storage, so I cannot give you a reading. I would say around 14.5-18V.
+electronicsNmore ok, thank you very much for the quick response! I like your channel.
Hello
I have been tryin for some time now to build one of these and I either can not find all the parts or dont have the time, I need one about this size for heat treat parts any chance of me buying one from you ? or sending you the money thru pay pal to build one for me?Just a thought I have all but given up on the idea to honest with you
Great video
Do you remember how many amps the circuit was drawing when the screw driver heated?
+uiticus
Please refer to part 2 for an answer. :-)
+electronicsNmore Okay great! Thank you ~
Is it possible to heat treat or temper knife/tool blades with this set up? If so this would create a much smaller footprint/bench space in a small workshop like mine, in which case I would consider making up a small station for the process in lieu of a forge/oven. I'm all eyes and ears if you have any other projects that can potentially save space in a microshop or small workshop. Good stuff!
Hi Jonto. If the working coil was made longer, then you could temper a short knife blade. As long as you know what metal is being heat treated, and the proper color to stop heating and quench, then you should be fine.
Thanks For watching. Be sure to share, and check out my other videos as well.
Thanks. Keep it up, i love this content!
Wow... Your such a very rare person to have explained this so well... Bravo!!!.. Bravo!!!
Thanks!. Be sure to check out my video playlists. :-)
Thanks!! That gave me a lot of ideas!!
Your welcome. Just experiment with different coils/capacitors/input voltages.
Do you have any plans to scale this up using dual mots? I think induction melting would be much safer than the scariac melter grant thorton did.
No. Too busy with many other projects.
What is the max. Temp the object can attain in your circuit?
Kartikeya Lonikar Hi there. As shown in the video using an object of similar diameter, I can expect around 1600 Deg F. By increasing the input power, I can attain higher levels. Ideally you would need to increase the diameter of the working coil wire, place a 2-3 capacitors in parallel, and use IRF3205's with a larger heat sink.
Late to the game here... but could you put a thermoelectric generator inside the coil?
Peltier junction?