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4hv.org :: Forums :: Electromagnetic Projectile Accelerators
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Charging Cap bank with Flyback Transformer

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aarpcard
Wed Apr 06 2011, 12:46AM
aarpcard Registered Member #2848 Joined: Tue May 04 2010, 05:19AM
Location:
Posts: 44
The schematic you showed is of a Flyback transformer connected to a bridge rectifier. Yet is would work, and that is what I'm doing, as the flyback I was using was already rectified.

Right now however, I'm in the process of building my own flycach transformer to custom fit my needs. I'll be passing that through a 1.2kv, 50A bridge rectifier as well.

You need a rectifier or else it won't charger the caps.
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Rustycan
Thu Apr 07 2011, 05:45PM
Rustycan Registered Member #3805 Joined: Sat Apr 02 2011, 09:06PM
Location: Jakarta, Indonesia
Posts: 14
wait, if you could provide sufficient voltage from the flyback itself, why use caps instead of use it directly to the coil?
Cmiiw


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Barry
Fri Apr 08 2011, 12:46AM
Barry Registered Member #90 Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301
Rustycan wrote ...

wait, if you could provide sufficient voltage from the flyback itself, why use caps instead of use it directly to the coil?
Cmiiw
Coilguns require very high current for a very short time. The flyback transformer could only be used directly if it could provide a few thousand amps for a few milliseconds time. Since it can't do that in a size and cost small enough to be practical, we just use them for relatively slow charging rate at a low current. Capacitors otoh are an excellent choice for extremely high current (low resistance) for a very short time.

Cheers, Barry
I went to a bookstore and asked the saleswoman, "Where's the self-help section?" She said if she told me, it would defeat the purpose.
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