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'[EE]: using 24V with 12V to 110VAC converter 300w'
2005\07\09@154223 by Gus Salavatore Calabrese

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I have a bus that runs a 24Volt system.  It is a pain to supply 12V
to accessories.  What recommendations would there be to adapt a
converter ( 12V to 110VAC converter 300watts ) to run on 24VDC ?
Any chance the the adapter would take the higher voltage directly ?

Thanks

Augustus Gustavius Salvatore Calabrese 720.222.1309    AGSC
http://www.omegadogs.com   Denver, CO


USA style democracy is mob rule

2005\07\09@162343 by D. Jay Newman

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> I have a bus that runs a 24Volt system.  It is a pain to supply 12V
> to accessories.  What recommendations would there be to adapt a
> converter ( 12V to 110VAC converter 300watts ) to run on 24VDC ?
> Any chance the the adapter would take the higher voltage directly ?

I use a 24V battery for the electronics for my robot. I get it down
to 12V with a 100 Watt 24V -> 12V switching converter.
--
D. Jay Newman           ! Polititions and civilations come and
spam_OUTjayTakeThisOuTspamsprucegrove.com     ! go but the engineers and machinists
http://enerd.ws/robots/ ! make progress

2005\07\09@174718 by Hopkins

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Why not fit a second alternator with 12v output and use this to charge a
12v battery.

_______________________________________

Roy
Tauranga
New Zealand
_______________________________________

> {Original Message removed}

2005\07\09@184145 by Martin Klingensmith

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Gus Salavatore Calabrese wrote:

> I have a bus that runs a 24Volt system.  It is a pain to supply 12V
> to accessories.  What recommendations would there be to adapt a
> converter ( 12V to 110VAC converter 300watts ) to run on 24VDC ?
> Any chance the the adapter would take the higher voltage directly ?


There are many inverters that run natively on 24v. I think I know the
"300W" inverter you speak of, it is a very cheap squarewave unit,
correct? It might take 24v if you were to analyze the circuit and
determine which parts would require modification. Otherwise you could do
like someone else said and create a separate 12v system. I would not tap
the 24v pack [2x12v batteries, right?]
You could easily make a buck SMPS to cut the 24v to 12v, it would
require some reading and experimentation if you have never done such a
thing though.
--
Martin Klingensmith

2005\07\10@223820 by Chen Xiao Fan

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I will guess the same as Martin that the 300W inverter may well be a
simple push-pull converter (square wave) with a step-up transformer
without the rectifier followed. However in this case, it is not so easy to
take 24V input since you need to modify the transformer turns ratio
to half of the original.

I think that Martin is correct that there will be plenty of inverters
that run natively on 24V. Anyway 24V bus is the standard in the
automation world. All of my DC design work with either 20-30V or
10-30V with 24V DC being the nominal value.

Regards,
Xiaofan

{Original Message removed}

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