I need to discharge a lot a energy in a short time from a capacitor, I don't have the numbers yet, but my question is if the power of a capacitor is limited for some others parameters of this.
Theoretically the energy stored depends of the capacity of the capacitor and the time of discharge can be adjusted with a resistance in order to change it. With this parameters I can obtain the power that the capacitor will give.
I'm trying to "power" a tungsten filament, like a light bulb, in order to transfer the energy for a chemical reaction, also I want to transfer a few Joules in a few nanoseconds.
Should I consider another parameters for this problem?
Best Answer
"I want to transfer a few Joules in a few nanoseconds."
This is going to pose some major obstacles.
In order to reduce the discharge time the capacitor should be as small as possible. To increase de level of energy storage I'd set the maximum voltage at 1000V, which is already hazardous.
C = 2E/V² or 2*5/(1000*1000) = 10μF
When loaded by resistor R, a capacitor could be considered fully discharged after 5*R*C secs. R = t/(5*C) = 5.10𐄐⁹/(5*10.10𐄐⁶) = 0.1mΩ.
This is about the resistance of 10cm of 15AWG copper wire and far below the ESR of a physical capacitor.