Author Topic: Ideas needed!  (Read 1306 times)

Offline oneKone

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Ideas needed!
« on: February 25, 2018, 07:31:40 AM »
hi,

i recently picked up a decommissioned mig welder from a mate. he said for some reason the case and handle was missing but the internals are all still good. so it got me thinking.... what could i use these cores for? i'm thinking as an inductor for a boost converter?  being a mig welder it would just be a big step down transformer with most likely a 12-40v output at 80 amps. 


Offline Hydron

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Re: Ideas needed!
« Reply #1 on: February 25, 2018, 11:18:59 AM »
From the picture those cores look like laminated steel. If they are designed for 50/60Hz then you won't be able to run them at the higher frequencies used in a switchmode (e.g. buck or boost) converter without huge losses in the cores.
Someone might have other suggestions for use though.

Offline AndreiRS

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Re: Ideas needed!
« Reply #2 on: February 25, 2018, 12:52:14 PM »
Well that's what he said. Works ok till only 400hz if I remember. Why not use it as a mig welder? ::)

Offline oneKone

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Re: Ideas needed!
« Reply #3 on: February 26, 2018, 12:32:38 AM »
@Hydron
I didn't even think about that. I just saw a big core and got excited!

@AndreiRS
I don't think I could justify the parts cost to get it running again, as well as I have a few other welders.

Offline Mads Barnkob

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Re: Ideas needed!
« Reply #4 on: February 26, 2018, 08:35:10 PM »
As you sit with 50 Hz parts it is hard to really reinvent it outside its original purpose.

One useful purpose, if you do not want a old welder, could be a spot welder for building prototype enclosure.

I actually also googled and found this from a welder manufacturer: https://www.everlastgenerators.com/blog/top-10-things-do-old-welder
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

Offline oneKone

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Re: Ideas needed!
« Reply #5 on: February 27, 2018, 01:59:01 AM »
Haha mads... I think I could use number 5 as an option! I think I'll see how much current the transformation draws when connected to mains, if it's not a lot I might just use it as a power supply if I get into high power zvs drivers

Offline kamelryttarn

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Re: Ideas needed!
« Reply #6 on: February 27, 2018, 09:48:28 AM »
Why not just convert it to a high current PSU? They can be very useful for driving induction circuits among other things. If it's a three phase transformer you would get a pretty low ripple voltage.

Offline MRMILSTAR

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Re: Ideas needed!
« Reply #7 on: June 20, 2019, 05:13:57 PM »
You might be able to use it as a ballast for a SGTC HV transformer.

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Re: Ideas needed!
« Reply #7 on: June 20, 2019, 05:13:57 PM »

 


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