I need to design a controller that can switch On and Off a line conducting high currents. the power line: it is supplied by a banks of capacitors the switch: it must close the circuit when a signal is given and stop it when another one comes.
the circuit will give a burst of current that may be a lot under the 1second of time, the timescale is in deciseconds or centiseconds
I was thinking to use a button for engage it and a beam-interruction sensor for disengage it. Pushing the button will engage the capacitor banks that will magnetize a coil producing a high magnetic force over a piece of metal, when that piece moves in the tube an ir receiver will see that the ir led is covered by the metal and he will switch off the capacitors. The control of the logic isn't a big problem, I can just use 1-2 little relays for control the switch.
I thought at a GTO thyristors but creating a negative current will be a handicap. There are relays that can keep high currents? the cheapest way? (I don't trust a lot transistors, they may suffer from magnetic field...etcc) the capacitors will be 2-3 at 300-350 working volts at around 200-500 uF at the start, but they might be 3800uf at 68 V or lower.
I can use without any problems the GTO if the signals can come from a different power sources
what is the best way for solve that? tank you Giulio