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Gallery, Projects and General => Gallery => Topic started by: ironman on August 03, 2012, 03:11:42 AM

Title: homemade induction heater
Post by: ironman 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.

[youtube]_nn5AVjKkjM[/youtube]

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

[youtube]X4zIO4zYSnk[/youtube]

edit: embeded links. Don
Title: Re: homemade induction heater
Post by: DICKEYBIRD 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:
Title: Re: homemade induction heater
Post by: HS93 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
Title: Re: homemade induction heater
Post by: PTsideshow on August 05, 2012, 08:56:14 AM: Here is the best source of information, on building an induction heater.
home built induction heater (http://www.richieburnett.co.uk/indheat.html)
Title: Re: homemade induction heater
Post by: Rob.Wilson on August 05, 2012, 09:23:44 AM: Cheers for the link Glen :zap:

Rob
Title: Re: homemade induction heater
Post by: shipto 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.
Title: Re: homemade induction heater
Post by: ironman 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.
Title: Re: homemade induction heater
Post by: PTsideshow on August 06, 2012, 06:43:59 AM: Quote from: ironman 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.
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.
Title: Re: homemade induction heater
Post by: ironman on August 07, 2012, 08:36:09 PM: The first video is my induction heater and yes I live in Australia
Title: Re: homemade induction heater
Post by: Ashlyn Katarzyna on August 20, 2012, 01:02:26 PM: Quote from: shipto 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.

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.
Title: Re: homemade induction heater
Post by: lordedmond 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
Title: Re: homemade induction heater
Post by: ironman 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
Title: Re: homemade induction heater
Post by: Clayton 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
Title: Re: homemade induction heater
Post by: awemawson 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
Title: Re: homemade induction heater
Post by: Joules 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 ?
Title: Re: homemade induction heater
Post by: drmico60 on October 09, 2014, 07:37:23 AM: Quote from: Clayton 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
Wound it not be easier to just use a resistance heater?
Mike
Title: Re: homemade induction heater
Post by: joshagrady 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.
Title: Re: homemade induction heater
Post by: lordedmond on October 09, 2014, 09:28:35 AM: Quote from: Joules 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 ?

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