Author Topic: homemade induction heater  (Read 24361 times)

Offline ironman

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homemade induction heater
« on: August 03, 2012, 03:11:42 AM »
Hi everyone

                  In a workshop I used work in had a induction heater to heat up bearings so I had a go at making my own click to see it working.


I also had a go at making one from a s.m.p.s it is low power but works well.


edit: embeded links. Don
« Last Edit: August 03, 2012, 12:15:30 PM by dsquire »

Offline DICKEYBIRD

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Re: homemade induction heater
« Reply #1 on: August 04, 2012, 10:23:08 AM »
Man that is amazing!  I wish I had the electronics knowledge to even slightly understand how you've made that device but thanks for posting!
   
Could you post a dumbed-down "Induction Heating for Dummies" description?:beer:
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Offline HS93

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Re: homemade induction heater
« Reply #2 on: August 04, 2012, 03:16:00 PM »
yes can we have some more information please

by the way is the first vid yours , are you in oz can hear the birds in background ? just beaing nosey

Peter
I am usless at metalwork, Oh and cannot spell either . failure

Offline PTsideshow

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Re: homemade induction heater
« Reply #3 on: August 05, 2012, 08:56:14 AM »
Here is the best source of information, on building an induction heater.
home built induction heater
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Rob.Wilson

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Re: homemade induction heater
« Reply #4 on: August 05, 2012, 09:23:44 AM »
Cheers for the link Glen  :zap: 


Rob

Offline shipto

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Re: homemade induction heater
« Reply #5 on: August 05, 2012, 10:45:48 AM »
I would really like to build one of these capable of melting about a litre crucible worth, must put it on my list for when the workshop is built.
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Offline ironman

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Re: homemade induction heater
« Reply #6 on: August 06, 2012, 12:25:26 AM »
Hello to DICKEYBIRD

                               Did you click onto the link given by the moderator? I bet that you were lost by reading the first few lines. There is no simple way of explaining of explaining it.  I don't know much about electronics but  it does'nt stop me from experimenting.

Offline PTsideshow

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Re: homemade induction heater
« Reply #7 on: August 06, 2012, 06:43:59 AM »
Hello to DICKEYBIRD

                               Did you click onto the link given by the moderator? I bet that you were lost by reading the first few lines. There is no simple way of explaining of explaining it.  I don't know much about electronics but  it does'nt stop me from experimenting.
He posted the question the day, before I posted the link.
You only appear, to post links to video's and don't seem willing or able to answer questions about your experiments, either here or on other forums.
"The internet just a figment, of my imagination!' 
 
 There are only 3 things I can't do!"
Raise the Dead!
        Walk on water!
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and I'm working on the first two!
glen

Offline ironman

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Re: homemade induction heater
« Reply #8 on: August 07, 2012, 08:36:09 PM »
The first video is my induction heater and yes I live in Australia

Offline Ashlyn Katarzyna

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Re: homemade induction heater
« Reply #9 on: August 20, 2012, 01:02:26 PM »
I would really like to build one of these capable of melting about a litre crucible worth, must put it on my list for when the workshop is built.

I'd like one to to be able to melt about 2lb of aluminum, that would solve many of my issues for lack of a furnace.

lordedmond

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Re: homemade induction heater
« Reply #10 on: August 21, 2012, 03:21:59 AM »
to muddy the waters

I used to install and maintain induction furnaces  from 56 pound  to 11 tons

the 11 ton ones were 1.5 mega watt units

we used to melt ferrous metals in all of them

but what I do know is that the smallest size one was run at a much higher frequency that the big ones  these ran at 50 hz  but the smaller one ran at 200 hz  this was done because as the size goes down the % goes with it hence the inc. in HZ

all of these furnaces were parallel resonant circuits with water cooled coils , I cannot remember the volts for the small ones but the big ones had a coils voltage of 1kv, the operators just adjusted the cap bank for unity PF


at a small scale you would need to go to a HF source  , heating is one thing melting is a different ball game , its the eddy currents that do the work nothing to do with the ferrous properties as iron/steel is none magnetic over a certain temp ( infact you use that property to establish the correct temp for hardening the metal when the magnet will not stick its hot enough )

Stuart

Offline ironman

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Re: homemade induction heater
« Reply #11 on: August 21, 2012, 08:37:08 PM »
To HS93

 Here are two links,

one is a forum about building homemade induction heaters  http://lists.neon-john.com/listinfo.cgi/induction-neon-john.com

The other has detailed info on how to build one  http://www.neon-john.com/Induction/Roy/Roy.htm

Offline Clayton

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Re: homemade induction heater
« Reply #12 on: October 09, 2014, 04:37:18 AM »
I am looking to build a oil heater, would just winding copper wire around a 2" pipe and plug into 220V 50Hz work? does not need to heat up fast or go above 300-400 C

Offline awemawson

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Re: homemade induction heater
« Reply #13 on: October 09, 2014, 06:44:29 AM »
It'll certainly BRIEFLY get hot, just before the fuse blows  :lol:

More constructively, 50 hz induction furnaces do exist in industry, the the charge has to be large to resonate at 50 hz and the circulating current, and hence the draw from the grid is huge, usually including dedicated sub station at the works
Andrew Mawson
East Sussex

Offline Joules

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Re: homemade induction heater
« Reply #14 on: October 09, 2014, 07:21:17 AM »
Just thinking out loud, but would a single phase to 3 phase inverter that can output upto 360hz be the basis for an HF power source ?
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Offline drmico60

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Re: homemade induction heater
« Reply #15 on: October 09, 2014, 07:37:23 AM »
I am looking to build a oil heater, would just winding copper wire around a 2" pipe and plug into 220V 50Hz work? does not need to heat up fast or go above 300-400 C
Wound it not be easier to just use a resistance  heater?
Mike

Offline joshagrady

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Re: homemade induction heater
« Reply #16 on: October 09, 2014, 07:47:54 AM »
Here's another link that might prove useful: http://www.rmcybernetics.com/projects/DIY_Devices/diy-induction-heater.htm
Some friends made a heater following the instructions on this page last weekend.  It only took them a couple of hours to get everything working.

lordedmond

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Re: homemade induction heater
« Reply #17 on: October 09, 2014, 09:28:35 AM »
Just thinking out loud, but would a single phase to 3 phase inverter that can output upto 360hz be the basis for an HF power source ?

The eddy currents from the resonant circuit would kill it

The best way is to use a rotary one say a two pole motor coupled to a eight pole alternator might do the job but it would have to be 10 hp

Then there is the problem of water cooling the coil and caps

You have to get a unity of on the coil

Stuart