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HID ballast for a spot welder

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  • HID ballast for a spot welder

    I'd like input on using a large ballast from a HID lighting system as the power source for a spot welder. The one I came across is 20 lbs and 1000 watts. I'm confused about the multiple input taps and the huge size of the secondary. Any help is appreciated.

  • #2
    What you have will give you high voltage at low current. What you need is low voltage at high current. Something along the line of a microwave oven transformer rewound for the high current/low voltage output is what you want.

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    • #3
      I did plan on rewinding this large transformer secondary as is done with the MOT.

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      • #4
        Originally posted by challenger View Post
        I did plan on rewinding this large transformer secondary as is done with the MOT.
        Then a 1000 watt transformer should be able to do what you want.

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        • #5
          Originally posted by SLK001 View Post

          Then a 1000 watt transformer should be able to do what you want.
          When I made my spot welder, I found that a 1200w MOT wasn't enough power and used 2 of them to get enough.

          The OP's 20lb, 1000w doesn't seem right. A 1200w MOT is only 5lb or so. The MOT's duty cycle is way less than an HID's ballast, but still.

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          • #6
            HID ballasts have extra steel for a partial magnetic shunt, etc. They are not like a standard choke coil.
            4357 2773 5150 9120 9135 8645 1007 1190 2133 9120 5942

            Keep eye on ball.
            Hashim Khan

            Everything not impossible is compulsory

            "There's no pleasing these serpents"......Lewis Carroll

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            • #7
              If you own a good brand MIG welder, they do make an add-on for a spot welder.
              That was true for my Hobart and I don't mean some Eastwood product.

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