My very first coil gun audioguru come

[robotgangsta]

i am building my very 1st coil gun it will use 10 450v 330uf caps wired in parallel 5 300amp scrs 1 diode and res. as needed i cannot find a 400v mains tranformer and if i dont my last option will be an inductor salvagd from a camera what kind of transformer can i use to get the necesary voltage beside 400v mains


limit $50 us currency 20 shall be spent on caps so that leaves 30 for everything else

 

[gramo]

The timing on coil guns has to be really good from what I've heard. Have you got a breif wiring diagram of what you want to do?

 

[RODALCO]

Bear in mind that the peak value of your 400 Volts transformer is 564 Volts dc when rectified.
You need a minimum of 600 Vdc rated caps.

a 230 Volts TX will give you 324 Vpk and 323 Vdc after rectification.

Get one from a surplus shop. see your other thread.

 

[audioguru]

Transformer manufacturers don't make high voltage transformers any more for the few kids who make coil guns.

 

[Hero999]

Also note that the back emf from the coil will destroy the capacitors so make sure it's either critically damped.

You need to ensure that the current as decayed when the projectile has been ejected. This isn't easy, you'll need to play around with the capacitor size and inductance of the coil to get it working properly.

I did have a spread sheet I downloaded but I can't remember where I got it from and it's on my work's computer so I'll get it to you tomorrow.

**broken link removed**

 

[robotgangsta]

thank you very much for your help