An EMP gun question mark

255

02:16:08

I have a coil with a calculated inductance of 320.600mH, it's wire gauge can handle up to 2 amps. 

But my question, does this even  work as an EMP?

published 7 years ago

BillyT

7 years ago

Probably not, an EMP device requires hundreds, if not thousands of amps (it self-destructs in use).

hurz

7 years ago

Mr 2cent learned a few days ago how to calculate current over time in coils. So how many days it takes to ramp up several amps inside 320mH i think to long to be dangerous. Anyway, you are not the first one who tried that with such a high inductivity. You must go down in inductivity and/or go up in voltage to overcome the impedance of the coil.

sshsslfun

7 years ago

Huh, I guess that makes sense, I'll look into EMPs and when I get home on Sunday I got a lot of things to do, such as experiments and school work, so I got a pretty tight schedule. I have a 668 uH inductor back at home, it can handle 2 amps of continuous current, so a couple hundred amps for 50 milliseconds shouldn't be too bad right? Maybe a joule thief can solve the issue by utilizing some 100F caps to create a capacitor bank and be able to create around a few hundred amps aswell as extend the life of the capacitor bank

sshsslfun

7 years ago

If I do make it, I might need some sort of cooling mechanism, maybe an extrenal battery to power some 12V fans or transformer oil being pumped through a PCB pipe and back to a radiator, but I might be overdoing it with a radiator

sshsslfun

7 years ago

Ok, so scratch the joule thief idea, it isn't necessary as I do not need voltage but rather amperage

sshsslfun

7 years ago

Problem: There exists no NPN or N MOSFET that exists in the market that can handle 8kA, the only NPN capable of handling a high current is a BUTW92 , for loads of 60 A and 500 V, so yea thats a big no no

hurz

7 years ago

I said you need high voltage to overcome the inductivity. Inductivity must be as low as possible to maximis current. Anyway, if you talk about your coils you have, are they air coils? 320mH as air coil must be very hugh. Still 668uH is a big one. Do you know whats your target?

hurz

7 years ago

You said EMP, do you know what this mean. Ok for me, this should be in a small range not earth wide 😁. So destroy some electronic device e.g. calculator from a few centimeter distance with a single pulse! Or at least to confuse it, right?

sshsslfun

7 years ago

lol, yea. I read some laws on EMPs for the US, turns out, any EMP is super illegal. So thats another project down the drain

hurz

7 years ago

So how does your air coil look like? It need to pass high current in short time to buildup quickly a stong magnetic field. Low resistance and low inductivity, right? 321mH bye bye. 2A for constant current is also not low ohmic wiring

sshsslfun

7 years ago

Sorry hurz, I might have used the wrong formula, I dont exactly have my notebook on me rn. Ill tell you tomorrow once I arrive at home the proper inductance. Thanks for the help btw.

hurz

7 years ago

???

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