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Power supply for micro TIG welder 0.1 - 80A?

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Sep 14, 2019
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I borrowed a MICRO-TIG DUAL ARC 82 HFP and somehow I fell in love.
Due to the price and availability in my country, I do not want to buy it, but I would like to take it as a toy and try my own design.
Last but not least, he can't do everything I could imagine.

My idea from the end
- I'll omit the burner and throttle control, it's actually just a servo valve and a float flow meter
- HF ignition high voltage source approx. 6000V and a large (HC) coil on which HV is mixed to the output voltage
- Pulse control and polarity rotation (aluminum welding) - Full H bridge controlled by a processor, DC input with today's transistors should not be too late to get to a resistance in the order of 2mOhms for the whole bridge. I don't see a problem with that.
-Current source 0.1-80A, approx. 2kW. Madness strikes me here, I sometimes panic to depression..
a) take 160A TIG Chinese source and use it as pruning source and do its own control
b) use a 400V / 80V transformer (I have it) and 3 to 4 step converters in parallel to it.
c) c) construct its own resource. I probably won't be able to do it without any clue, I have no experience with it and so I'm afraid that I will destroy many harsh MOSFETs or IGBTs. I have an EE100 core with G44 magnetics (Al 7100 [nH])
I welcome a link to some source and similar construction. On the other hand, I am afraid of this, I see structures built like willow nests, which switch even higher performances.
Simply advise

Here one madman built a welding inverter from waste, Use - forward converter with two switches max 100A.
Take this as a starting point for a discussion

Possible introductory questions.
1. Is there any more suitable switching power supply topology for TIG inverters?
2. If not, what switching frequency to use?
3. How can individual sections be improved? Input section with 230AC to 325DC conventer, Drive section etc.


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