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Running 3 Phase Welder on a VFD?

  • 27-08-2022 09:47PM
    #1
    SuperTortoise
    Registered Users, Registered Users 2, Paid Member Posts: 3,497 ✭✭✭


    Long story short my inverter stick welder recently stared leaking smoke, last year i bought a cheap Chinese MIG welder and i'm using it as a paperweight on my welding bench because that's all it's good for. I've been looking for a decent inverter based MIG welder for a couple of months now and i just can't seem to spec one that's single phase, 300amp, and a decent brand. (Lincolm, Miller, Fronius, Kemppi)

    A 250amp seems to be as big as a single phase MIG welder goes, while i would'nt be welding at those amps every day i'd like the option to if the need arose.

    I'm now seriously considering buying a 3 phase version and running it off a VFD. Getting 3 phase power into the workshop i'd imagine would cost an arm and a leg.

    I know Milling Machines,Lathes, Pillar drills etc can do just fine running on a VFD, but i don't know about welders.

    Questions:

    Is this a realistic option? I'd want to be absolutely sure this is going to work without frying a new €3k+ machine.

    Has anyone ran a welder off of one and was it a success.?

    Thanks.



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