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Registered Member #3340
Joined: Wed Oct 20 2010, 07:28PM
Location:
Posts: 69
I was looking for a way to make a small voltage booster for a portable power suppy. I want to covert 3 volt dc to about 450 volt dc. While browsing the net for info i came across this video. What would the components be if i want to make something similar to his desing?
Registered Member #1667
Joined: Sat Aug 30 2008, 09:57PM
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Posts: 374
voltage multipliers and flyback / forward converters don't mix. The video you mention also suggests using a MOSFET. Since these devices need a few more volts as gate voltage to work properly, start with an LMC555 (C denotes CMOS version) that generates both the gate control clock and an output suitable for a charge pump. Then you may still consider a double-ended topology.
You could as well build a resonant royer-type converter (the urban language term for the MOSFET version is "ZVS") and supply >10V to the gate pull-ups from the charge pump.
Registered Member #3340
Joined: Wed Oct 20 2010, 07:28PM
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Posts: 69
This is for a small Marx Generator.
Hmm, i have 2 transformers right now, i think they were 220 to 3,7 so by using something like 7-8volts i would be able to attain the voltages i want. But what about the inverter circuit, how do i make it?
Registered Member #3340
Joined: Wed Oct 20 2010, 07:28PM
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Muttyfutty! wrote ...
450Vdc is really not suitable for a marx; your spark gaps will need to be ridiculously precise, you're better off using a HV transformer...
I am going to power an 18 stage cw voltage multiplier with the 450Vdc. Then the output of the multiplier is going to power the marx generator so i don't see why the spark gaps have to be so precise.
Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
For something like 300v or so I suggest using a boost converter a simple design will work fine follow the design like this , which includes a calculator to figure up the part values you need for desired supply and output parameters.
Registered Member #191
Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
Michalis.Biochem wrote ...
Muttyfutty! wrote ...
450Vdc is really not suitable for a marx; your spark gaps will need to be ridiculously precise, you're better off using a HV transformer...
I am going to power an 18 stage cw voltage multiplier with the 450Vdc. Then the output of the multiplier is going to power the marx generator so i don't see why the spark gaps have to be so precise.
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Voltage booster
