Supercapacitor + Solenoid + MOSFET? Answered
I am designing a coilgun with three stages. Each stage has 1mm thick copper wire, with 32 turns across 32mm of length (1000 turns / meter). There are 4 layers with the same wire, length, and number of turns on each stage. Each coil will be powered by a 100F 2.7V supercapacitor (assume charging circuitry has been implemented).
With those values, I have calculated that the resistance of the coils is about 0.1 ohms. With a 2.7V capacitor, I can get almost 25 amps of current through the coils, resulting in a total magnetic field of about 0.1 tesla. If I wire the coils in parallel, I get a resistance of 0.05 ohms and 420 amps through the coil, resulting in a field of strength 2 tesla.
Now, the problem I am running into is shutting off the current at the right time. I found a MOSFET used for 3D printers that says it can handle up to 280A (360W at 12V or 720W at 24V). If I use thinner wire, I can decrease the current to below 280A which I suppose is powerful enough for the coilgun.
Since I will be using an Arduino or similar microcontroller to manage the timing for the coilgun, would I be able to use this MOSFET (linked below) to shut off the current using a signal from the Arduino?