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Boost converter- thinking big.

Discussion in 'Power Electronics' started by brian hughes, Nov 12, 2018.

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  1. brian hughes

    brian hughes

    Nov 12, 2018
    I want to build an off-grid MIG welder that can run from a vehicle electrical system. What's available in the vehicle is a nominal 12volt battery capable of delivering short bursts of several hundred amps, topped up by a 120 amp alternator. What I need to get to is a stabliised, adjustable voltage around 20 volts delivering bursts of around 100-120 amps.

    Is this feasible?

    What sort of challenges can I face when scaling up a switching regulator to this sort of power?

    To take a different approach, can smaller regulators be paralleled up to create a redundant array, or does bad stuff happen when you try this?

    Thanks for any help.
  2. kellys_eye


    Jun 25, 2010
    Paralleling is certainly an option and common for larger supplies.

    Have you seen Aldi's switching welder? Might be a place to start rather having reinventing the wheel.
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