Searching \ for '[EE]: slightly [OT]: 240 Vdc to 12 Vdc invertor' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/index.htm?key=240+vdc+vdc+invertor
Search entire site for: 'slightly [OT]: 240 Vdc to 12 Vdc invertor'.

Exact match. Not showing close matches.
PICList Thread
'[EE]: slightly [OT]: 240 Vdc to 12 Vdc invertor'
2002\09\19@175556 by 4HAZ

flavicon
face
We are in need of a 240 Volt DC to 12 Volt DC converter of some fashion,
this could be a 240 Volt DC to 240 or 120 Volt AC or Directly from DC to DC.
The 240 Volt DC source is a bit dirty, ranging around 250 Vdc with spikes
and surges both high and low due to the fact that it is being supplied
through 2 iron tracks + iron wheels and bearings (bit tough on the
bearings).
This is in an extremely hostile environment (molten iron being poured) so
the unit should either be capable of being mounted inside the air
conditioned cab, or capable of operating in an extremely hot environment.

Lonnie - KF4HAZ -

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2002\09\20@101230 by Ray Gallant

flavicon
face
source=What is your DC current consumption requirement.  What regulation accuracy is required?  Do you have inductive loads?   I have assumed that your primary source is 240VDC?

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\20@110155 by Mike Singer

picon face
KF4HAZ wrote:
> We are in need of a 240 Volt DC to 12 Volt DC converter
> of some fashion, this could be a 240 Volt DC to 240 or 120
> Volt AC or Directly from DC to DC.

Perhaps PC power supply would match.

Mike.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\20@114706 by mpoulton

flavicon
face
Yes!  Now that's good.  I had been watching this thread for
awhile, wondering what people would come up with and not
getting any good ideas myself.  That is great.

---- Original message ----
>Date: Fri, 20 Sep 2002 18:02:30 +0300
>From: Mike Singer <spam_OUTmikeTakeThisOuTspamPOLUOSTROV.NET>
>Subject: Re: [EE]: slightly [OT]: 240 Vdc to 12 Vdc
invertor
>To: .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
>
>KF4HAZ wrote:
>> We are in need of a 240 Volt DC to 12 Volt DC converter
>> of some fashion, this could be a 240 Volt DC to 240 or 120
>> Volt AC or Directly from DC to DC.
>
> Perhaps PC power supply would match.
>
> Mike.
--
Mike P.
MTP Technologies
KC0LLX

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\20@121256 by Ray Gallant

flavicon
face
source=Sorry, must be me, still don't understand the application.  Where is this 240 volts........DC coming from.  Are trying to regulate 240VDC to 12V?  Still don't know what your accuracy & consumption factors are!  As per the PC supplies, they work OK with nice current on +12V with line regulation of 5 to 7%.  If you ever need the 5VDC output, you'll need to satisfy the 5V sense on them so that the Main 5V doesn't clamp.  Just add a jumper.  I guess that's great!

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\20@175031 by Ray Gallant

flavicon
face
source=I know that you've got all the answers your looking for in regards to your inverter and the PC supply.  Here some additonal literature on inverters.  Try chapter #4 I think.
http://www.pwrx.com/pwrx/app/solid_st.pdf
Please let us know your final results.  It's a useful project.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\20@231154 by Mike Singer

picon face
Mike P.
> Yes!  Now that's good.  I had been watching this thread for
> awhile, wondering what people would come up with and not
> getting any good ideas myself.  That is great.
>
> >From: Mike Singer <mikespamKILLspamPOLUOSTROV.NET>
> >
> >KF4HAZ wrote:
> >> We are in need of a 240 Volt DC to 12 Volt DC converter
> >> of some fashion, this could be a 240 Volt DC to 240 or 120
> >> Volt AC or Directly from DC to DC.
> >
> > Perhaps PC power supply would match.
> >
> > Mike.
> --
> Mike P.

That may not be as great as you think.
Usually stabilized is the only 5v output, so you have to
provide some min load to 5v output. And then due to
12v loop internal resistance you may get 12v dropped
to ~11v at a max 12v load.

Mike.

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\20@234021 by mpoulton
flavicon
face
That depends on the supply.  Many nowdays do not require a
minimum load.  Besides, any switching power supply would
work on the same principle, and they are available with 12V
only outputs.

---- Original message ----
>Date: Sat, 21 Sep 2002 06:11:21 +0300
>From: Mike Singer <.....mikeKILLspamspam.....POLUOSTROV.NET>
>Subject: Re: [EE]: slightly [OT]: 240 Vdc to 12 Vdc
invertor
>To: EraseMEPICLISTspam_OUTspamTakeThisOuTMITVMA.MIT.EDU
>
>Mike P.
>> Yes!  Now that's good.  I had been watching this thread
for
>> awhile, wondering what people would come up with and not
>> getting any good ideas myself.  That is great.
>>
>> >From: Mike Singer <mikespamspam_OUTPOLUOSTROV.NET>
>> >
>> >KF4HAZ wrote:
>> >> We are in need of a 240 Volt DC to 12 Volt DC converter
>> >> of some fashion, this could be a 240 Volt DC to 240 or
120
{Quote hidden}

subtopics
>(like ads or off topics) for you. See
http://www.piclist.com/#topics
>
>
--
Mike P.
MTP Technologies
KC0LLX

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics


2002\09\23@182110 by 4HAZ

flavicon
face
Have found many for converting 12vDC to 240vAC but none for 240vDC to 12vDC
or 240vDC to 240vAC
am considering using a triangle wave driving a pair of H-bridges (one driven
through an inverting-op-amp) but of course I will have to build a suitable
supply for this to run from the 240Vdc.

We are in need of a 240 Volt DC to 12 Volt DC converter of some fashion,
this could be a 240 Volt DC to 240 or 120 Volt AC or Directly from DC to DC.
The 240 Volt DC source is a bit dirty, ranging around 250 Vdc with spikes
and surges both high and low due to the fact that it is being supplied
through 2 iron tracks + iron wheels and bearings (bit tough on the
bearings).
This is in an extremely hostile environment (molten iron being poured) so
the unit should either be capable of being mounted inside the air
conditioned cab, or capable of operating in an extremely hot environment.

Will require 10 amps average on the 12 volt DC side 20 amps peak.

P.S. actual readings show anywhere from 208 Vdc (when the motors are
loading-up to 277 Vdc when they first disengage.

Lonnie - KF4HAZ -

--
http://www.piclist.com hint: To leave the PICList
@spam@piclist-unsubscribe-requestKILLspamspammitvma.mit.edu


More... (looser matching)
- Last day of these posts
- In 2002 , 2003 only
- Today
- New search...