DC to DC step up
DC to DC step up
(OP)
I have been looking for a schematic for a DC to DC step up
I'm needing to go from 48v DC to 170v DC and probably over 6000 watt on the 170 side.
I'm hoping to stay away from transformers and tune it to be as efficient as possible.
I appreciate your help,
Dom
I'm needing to go from 48v DC to 170v DC and probably over 6000 watt on the 170 side.
I'm hoping to stay away from transformers and tune it to be as efficient as possible.
I appreciate your help,
Dom





RE: DC to DC step up
You will need a transformer. You should look at SEPIC designs.
By the way a 6kW supply like you're proposing is major league. I hope you've done a few 1 or 2 kW projects to warm up with.
If you need just one unit, buy a really big inverter and hack it. You will save a huge amount of time and money.
Keith Cress
kcress - http://www.flaminsystems.com
RE: DC to DC step up
And yeah I agree after hitting the submit button I did a little more research and was like yeah its going to need a
transformer.
I asked the question because I'm always under the impression
that transformers are parasitic up the voltage and the current goes down And obviously I need the current.
RE: DC to DC step up
TTFN
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RE: DC to DC step up
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: DC to DC step up
And true true so what you put in you basically get out
just higher voltage and lower amperage.
So it would be somewhat safe to say that the wattage would almost be the same on both sides?
RE: DC to DC step up
RE: DC to DC step up
Anyways I'm gathering I should be stepping this up with
High frequency transformer only problem is every one of these
transformers I look at are small I do not see how they could pass that much amperage. Or I'm looking at it in the wrong way.
RE: DC to DC step up
Just think about primary windings that look like battery jumper cables.
TTFN
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RE: DC to DC step up
Keith Cress
kcress - http://www.flaminsystems.com
RE: DC to DC step up
Having evperienced one myself as a frosh, it ultimately determined that I would graduate as a digital EE from college.
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: DC to DC step up
And no offense But little quick to assume I'm a beginner
specially considering you don't know my background.
But I understand what your saying
RE: DC to DC step up
The KVA capability of a core is roughly proportional to the frequency. The maximum Volts per turn is also roughly proportional to the frequency.
Now, you've found a core, but there is not enough space for your windings. Double the frequency and the Volts per turn. Now you need only half as many turns for the same result.
Bill
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"Why not the best?"
Jimmy Carter
RE: DC to DC step up
RE: DC to DC step up
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If we learn from our mistakes I'm getting a great education!
RE: DC to DC step up
208 RMS/(3^1/2) = 120 VAC RMS Phase to Neutral
120 VAC RMS x (2^1/2) =169 V Phase to Neutral Peak
Then 3 Phase half wave rectify and capacitor filter.
RE: DC to DC step up
So, I'll just make things easy. Use 110VAC with a redonkulously large capacity full bridge (or parallel them) and a bank of caps to match.
This will give you about 170VDC. Also buy health insurance.
dan
RE: DC to DC step up
We do not know what you'd do with the 170 VDC output. Are you trying to get 115 Vac from 48 VDC batteries? For telecomm?
If so, then the best way would be using an off-the-shelf inverter. There are plenty of commercial units available for converting 48 volt DC to 115/230 volt ac.
If your main business is not power electronics, then there is absolutely no benefit in developing a 6kW inverter by yourself.
RE: DC to DC step up