Capactior and inductor math problem

I'm trying to create a 400 amp inverter welding machine, and may be using 4 aluminum electrolytic capacitors in parallel to provide the power(or whatever is needed). Main voltage is 120vdc. I need to know what size capacitor do I need and how large of mosfets do I need to get the job done? The reason for the mosfets is, in an inverter welder the capacitor bank is hooked up to a series of mosfets which are connected to a heatsink which the positive terminal of the welding machine is hooked up to. To my knowledge the metal plate on the back of the mosfet is connected to the drain pin which means its becomes a part of the circuit along with the heatsink that its attached to thus allowing current to flow to the terminal. I need someone to do the math involved in this operation to figure out how large of a capacitor I need along with the mosfet I also need to use an inductor to utilize the full potential of the capacitor this also needs to be calculated

Skills: Electrical Engineering, Electronics, Engineering, Matlab and Mathematica, Mathematics

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Hello. I read through your post, and found your project to be very interesting. 400 amp is pretty stout for 120v input! I wanted to provide some feedback that I think would help you with your project. With 120V (and as More

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Hello, what you are describing is a capacitive welder. This welder is used for spot welding not continuous bead welding. An inverter welder is a welder that uses a switch mode power supply to create the welding vo More

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