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Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
Finishing up my "ask the forums!" streak. All is working fine. now, seeing as my cam charger fails at life, i need a new design. I heard about Boost converters going for coilguns...
Whats the best schematic going around the web to make one?
Input voltage: I dk as long as its not 50K batterys Output voltage: 350 Volts
Id also need a lil tip on changing it to fit my required voltage divides..
Sry for all the questions / helps but the coilgun is a new thing to me. I know more the microcontroller programming section. LCD 20*4, graphical, sounds, keyboards, mechanics, etc..
Registered Member #1633
Joined: Tue Aug 12 2008, 04:21AM
Location:
Posts: 45
ok, so you first need an oscillator stage, you could use a 555 timer for this. then you need a Fet driver, something like the Texas instruments TL2812 should work. then you'll need either a high voltage Mosfet or IGBT, something like 1200v and 13 amps should do the trick. and you'll need two fast action diodes, rated for about the same parameters as your FET.
Registered Member #1497
Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
I just built this one myself and it works great
Just keep in mind that it does need heatsinking, and that the diode tab is at a different potential than the MOSFET tab (and failing to isolate the diode also means that the diode heatsink is at 400V!).
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
aonomus wrote ...
Silicone pad + nylon washer
Maybe you can help me then. The guy in my aim isn't on much...
Would it kill to post a list of parts that i can get of digikey or something? I've never made a boost converter so, My diodes are rated 1000V 10amps but not fast action...
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
rp181 wrote ...
its actually better and eaiser to understand the theory behind a boost converter and make your own.
Mmmk, All the parts i was told to get are just special higher power parts.. basic diodes but high power..I can prob. figure most of it, but i was told to get voltage divides, and stuff.. So its finding out what to use to GET a set power, and not climb to infinity. xD
Some places like wiki just show simple circuits. diode. powere source. switch. inductor.
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Finishing up - Boost question :)
