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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Railgun capacitors

NsxAnJeL

New Member
Hey there,

I've been looking for capacitors that would be ideal for powering a Railgun. I need about 1.5k Amps running through my circuit to produce a powerful enough magnetic field to launch the projectile. At first I was thinking to put about 10 250V capacitors at about .5mF each in series so that the voltage would add up (and so would the amps I = V/R) but then I realized that the ESR of each capacitor would also add up, cancelling the increase in current. I'm now thinking of putting them in parallel to increase the amps (I = dq/dt or I = C*dv/dt). However, I'm afraid that passing such an enormous current through these capacitors will simply fry them. I only need the current for about 0.05 seconds. Is there a way I can find out the maximum amount of amps that can run through a capacitor?
 
Basically for a pulse you can usually run any current through the cap that it will supply.
 

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