As a first step in creating Electrochemical etching machine we need a proof-of-concept experimental platform. It should :
1)Provide pulses from 10us up to 10ms of DC current to load (U=15-40V, I=100A max)
2)Have all adjustments to change pulse time, pulse voltage
3)Have outputs for oscilloscope to detect real current and voltage forms
For the very beginning of the work, a circuit with rectifier, a mosfet, mosfet-driver, pulse time adjustment and inductive load overvoltage protection will be enough, so we can test your skills and get early concept.
The load is a gap between electrodes, filled with electrolyte (NaNO3 water solution), and has complex resistance (active, inductive, electrochemical + inductance of power wires)
If the proof-of-concept shows that the idea is right, we can offer long-term work for creating full power, complete etching machine