mark-wiring
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| posted on 1/1/08 at 09:43 PM |
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Anyone handy with circuits??
Right i know its poss but i dont know how to make a voltage doubler and then some to increase from 12v dc to 110v dc.
Anyone know how to make one?
Can it run at 15amp draw with a 40 amp spike capable?
Any help guys will be great
thanks
http://www.v10viento.co.uk
Have to recommend
http://www.extraefi.co.uk/
For all Megasquirt needs
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oadamo
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| posted on 1/1/08 at 09:52 PM |
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you can get inverters off the bay for about £5.
but for 15amp you will have to have a look at which one suits you.
adam
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mark-wiring
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| posted on 1/1/08 at 09:55 PM |
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dont inverters make it ac tho then i will have to rectifiy it to dc afterwards and i dont think i can get an inverter that will handle a continus
15amps without spending loads of cash and the idea is to spend as little as poss
http://www.v10viento.co.uk
Have to recommend
http://www.extraefi.co.uk/
For all Megasquirt needs
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stevetzoid
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| posted on 1/1/08 at 10:02 PM |
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What are you trying to do? there may be easier ways, but initially your 12 v dc supply must be able to deliver approx 150 amps how long will it last?.
Need more info.
Regards Steve Evans.
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mark-wiring
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| posted on 1/1/08 at 10:09 PM |
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Really is the power requirement that much?
As you can see i know little if nothing about this subject.
Its for a HO2 generation plant that will be used to power a stationary engine
Just toying really bored over christmas and all that
http://www.v10viento.co.uk
Have to recommend
http://www.extraefi.co.uk/
For all Megasquirt needs
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JoelP
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| posted on 1/1/08 at 10:20 PM |
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15A at 110v is roughly 150 at 12V, this is more than you altenator i think, though theres nothing to stop you adding a second.
Im a bit puzzled though, you want to make gasses to run an engine off, but you'd have to leave the car engine running to power the altenator?
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Macbeast
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| posted on 1/1/08 at 10:25 PM |
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The only practical way of getting 110 V from 12V is to chop it to ac and then either transformer it or voltage multiplier x 9. Another way would be to
use dynamotor where a 12V dc motor drives a 110V dynamo.
And yes, if you want 15A at 110 V you are going to pull 15 x 9A at 12V PLUS allowance for losses.
Be a lot cheaper and easier to buy your gases in cylinders 
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mark-wiring
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| posted on 1/1/08 at 10:26 PM |
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Yeh secondary battery second alternator if needed and then see how it goes really as i said bored over christmas palying around watching too much
youtube prob but the idea intrigued me enough to take a look for myself.
Managed to make a small cell that produced gas approx 1 litre every 36 seconds now i know that is not enough to power squat but with a bigger cell who
knows till i make it always worth a try
http://www.v10viento.co.uk
Have to recommend
http://www.extraefi.co.uk/
For all Megasquirt needs
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Bob C
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| posted on 1/1/08 at 10:30 PM |
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If you can't do the circuit, it's probably a helluva learning curve. Why not get DC motors of the right voltage & couple the 12V one
to the 110V one - make a motor generator set.
OK I've never seen a 110V permanent magnet DC motor (mind you I've never looked for one....), but you'd probably be better using a
DC brushless + bridge rectifier.
Bob
PS some kind of flywheel will give you the "ride through" capability
[Edited on 1/1/08 by Bob C]
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redscamp
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| posted on 2/1/08 at 01:44 AM |
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try this site
Alternator Secrets
www.1stconnect.com/anozira/SiteTops/energy/Alternator/alternator.htm
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joneh
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| posted on 2/1/08 at 06:57 AM |
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If this helps each side of a transformer must have the same total rms power.
Power = RMS current * RMS Voltage.
HTH.
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MikeRJ
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| posted on 2/1/08 at 09:19 AM |
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quote:
Originally posted by mark-wiring
Really is the power requirement that much?
Yes, and for your 40 Amp peak the 12 v current will be around 400 Amps or more with all the loses taken into account. This is certainly a very
non-trivial project!
Are you trying to electrolyse water to power an internal combustion engine? If so, don't bother, it won't work (unless you electrolyse
the water from e.g. mains electricty and store it, but this will be somewhat more expensive than petrol I suspect).
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Macbeast
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| posted on 2/1/08 at 10:00 AM |
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Don't forget - 110V and water is lethal combination. Be afraid - be very afraid
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matt_claydon
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| posted on 2/1/08 at 11:17 AM |
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I don't quite understand the point. You won't be able to generate the electricity using the engine you are running on Hydrogen - that
defies the laws of Thermodynamics (you are getting more energy out than you are putting in). You would need a separate engine running on petrol to
generate the hydrogen which could then be used in the hydrogen engine.
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martin1973
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| posted on 2/1/08 at 02:38 PM |
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why 110volt?
could you not use something like an RF generator?
martin
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t.j.
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| posted on 2/1/08 at 09:24 PM |
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It's probably the same idea: using the heat from the engine to bowl a secondary steam-engine.
That's Hybrid Petrol/Steam? 
Can someone try this?
I'm buzzy with my build 
[Edited on 2/1/08 by t.j.]
Please feel free to correct my bad English, i'm still learning. Your Dutch is awfull! :-)
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MikeRJ
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| posted on 2/1/08 at 09:47 PM |
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quote:
Originally posted by t.j.
It's probably the same idea: using the heat from the engine to bowl a secondary steam-engine.
That's Hybrid Petrol/Steam?
At least your scheme is using waste energy instead of the useful energy output of the engine! Applying the heat to a Stirling engine might work
better, as the coolant wouldn't normaly get hot enough to produce high pressure steam. Unless the headgasket has failed
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blueshift
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| posted on 3/1/08 at 12:46 AM |
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Why do you want to run it off 12V out of curiosity? Why not just run it off the mains? You could rectify mains and modify your design or run two in
series.
If it's so you can run your hydrogen engine where mains supply isn't available I'd suggest bottles, or a mains generator, rather
than trying to step up 12V -> 110V.
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t.j.
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| posted on 3/1/08 at 09:26 AM |
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quote:
Originally posted by MikeRJ
quote:
Originally posted by t.j.
It's probably the same idea: using the heat from the engine to bowl a secondary steam-engine.
That's Hybrid Petrol/Steam?
At least your scheme is using waste energy instead of the useful energy output of the engine! Applying the heat to a Stirling engine might work
better, as the coolant wouldn't normaly get hot enough to produce high pressure steam. Unless the headgasket has failed
The stirling is still patented?
Or may we ?
Please feel free to correct my bad English, i'm still learning. Your Dutch is awfull! :-)
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