/diy/ - Do It Yourself

>>2703611
>SCR
I want to be able to turn it off. I will consider IGBTs, but honestly there are some bloody good MOSFETs out there these days. I can get the ASW65R072EFD for $2.90 each, which is a 700V FET with 72mΩ on resistance, and is capable of 162A pulsed. I have no qualms with designing a 10A gate driver.

>Don’t try and switch 480 V directly
I'm not. I'll be storing energy as a constant current in an inductor (something in the ballpark of 10A) using a half-bridge (Q1/Q2) while keeping the power transistor Q3 turned on. Then turning Q3 off will cause the current to spike and arc to the workpiece. Pic related, haven't worked out most of the details, the inductor could be anywhere from 100µH to 1mH. The initial power source is a 12V ATX PSU.
I'm copying the idea from this:
>https://tenebryo.github.io/posts/2021-04-07-edm-power-supply.html
He uses a full-bridge to get bipolar arcs, but I'm not really interested in that. He also uses rectified mains as his power supply, which feels overkill because resistor+capacitor methods work when they only run at 60-100VDC anyhow. It also seems kinda dangerous.