On Sat, 10 Oct 2015 02:32:10 -0500 fmiser via Mercedes
wrote:
> They all do. At least all the recent ones. Switching mode
> power supplies promptly turn the AC into DC - at line
> voltage. That means about 120 VDC. This is then used to
> drive the DC-to-DC converters that result in +12, +5, +
They all do. At least all the recent ones. Switching mode
power supplies promptly turn the AC into DC - at line
voltage. That means about 120 VDC. This is then used to
drive the DC-to-DC converters that result in +12, +5, +3, -5,
etc. Feed it a steady DC in their voltage range and it
should b
> Meade wrote:
>
> Are there PC power supplies that accept DC power as well as
> AC power?
They all do. At least all the recent ones. Switching mode
power supplies promptly turn the AC into DC - at line
voltage. That means about 120 VDC. This is then used to
drive the DC-to-DC converters that
On Oct 7, 2015 11:52 PM, "Jim Cathey via Mercedes"
wrote:
>>
>
> Budget is essentially zero, as what we have serves the needs.
> We just charge UPS on rope-pull; heat water, cook, dry on BB.
May be time for an upgrade, that seems way too complicated. Andrew says
solar is a good deal; I'll bet yo
On Fri, 9 Oct 2015 10:40:53 -0400 Meade Dillon via Mercedes
wrote:
> And then your computer takes the 110-240V 50-60Hz and turns it back into
> DC...
Yup.
> A laptop needs a DC input, maybe some efficiency could be gained by
> simply converting the AC from the generator to DC once, and then on
And then your computer takes the 110-240V 50-60Hz and turns it back into
DC...
A laptop needs a DC input, maybe some efficiency could be gained by simply
converting the AC from the generator to DC once, and then only consuming DC
on that circuit? Lights and water heaters don't care about frequenc
G: No, I mean a 110v generator feeding an inverter that converts it to
DC.
Terminology. That's not an _inverter_! Converting AC to DC is
easy, cheap, and common. Inverting the process is not, relatively
speaking.
The inverter-based generators, like Honda's EU1000i, are DC generators
that fee
> On October 9, 2015 at 1:08 AM archer75--- via Mercedes
> wrote:
>
> G: No, I mean a 110v generator feeding an inverter that converts it to DC.
> Then, the inverter feeds the DC to another inverter that produces a 110v sine
> wave. Then, if the sine wave is now a steady 60hz but with a squirre
I have a brand new WEG VFD for sale. it is in the 10-20 amp range
for 3 phase 240 or 480, but I'd have to check the model number to be
sure of the ratings. It contains an inverter. it takes dirty sine
waves and you can adjust the output frequency.
> > Gerry wrote:
> I'm thinking two i
On Wed, Oct 7, 2015 at 9:35 AM, Curly McLain via Mercedes <
mercedes@okiebenz.com> wrote:
>
> Mostly Deutsch or Italian motors, and those like "clean" sine waves. THey
> tend not to fare well with dirty wave forms.
>
I'll just note in passing that I fried a modern transistorized Lionel model
trai
> > Gerry wrote:
> > I'm thinking two inverters back to back
> Craig wrote:
> You mean a DC power supply feeding an inverter ...
G: No, I mean a 110v generator feeding an inverter that converts it to DC.
Then, the inverter feeds the DC to another inverter that produces a 110v sine
wave. Then, i
But a DC power supply feeding an inverter is exactly what a certain
class of UPS is, though I forget the special name.
Me too, but all four of our big UPS's are that kind. APC's Smart-UPS
x2,
and Best Power's FerrUPS x2. We're using the small 2kVA APC. Backups?
We gotcher backups right here
On Wed, 7 Oct 2015 19:51:18 -0400 archer75--- via Mercedes
wrote:
>
> I'm thinking two inverters back to back
You mean a DC power supply feeding an inverter ...
> and a sine wave line conditioner feeding the computer equipment on a
> special circuit; assuming that the inverters can handle a s
Jim,
Your unit has a mechanical flyweight governor that is either belt or gear
driven. It's probably a Hoof, Pierce, or something comparable.
You can use the Google to get more information on the Hoof governors, as the
operation is pretty common amongst all mechanical governors.
You'll have a
> > Max wrote:
> >
> > In Jim's case, I don't think I'd want to compete against
> > your kid in making
> > _anything_!
> Jim wrote:
>
> These are not inherited traits. Kid can't make anything
> material. Not interested.
True. However, without environment it is less likely for
talent to develop
In Jim's case, I don't think I'd want to compete against your kid in
making
_anything_!
These are not inherited traits. Kid can't make anything material.
Not interested.
-- Jim
___
http://www.okiebenz.com
To search list archives http://www.okiebenz.com/a
Not sure if it's in the budget, but it could be retrofitted for an
electronic or "isochronous" governor for a few bucks. That keeps it
dead nuts at 60Hz no load to full load.
Budget is essentially zero, as what we have serves the needs.
We just charge UPS on rope-pull; heat water, cook, dry on
from the way things sound. A well adjusted mechanical governor
shouldn't vary more than 3Hz at load changes, and that would be heavy
loads. If it does, something is not adjusted properly or he's got fuel
system issues.
Yeah, that mechanical thingy has holes and springs. I have no
instruction
I'm thinking two inverters back to back and a sine wave line conditioner
feeding the computer equipment on a special circuit; assuming that the
inverters can handle a squirrelly sine wave. The DC coming into the second
inverter should be converted into reasonable good sine waves, and the line
Jim's issue is due to variations in the engine speed. No buck/boost transformer
will fix that.
He needs to get the sensitivity ("gain") on the governor adjusted properly,
from the way things sound. A well adjusted mechanical governor shouldn't vary
more than 3Hz at load changes, and that would
You need a "buck booster" in between. basically regulates the power
supply. takes crappy waves and makes nice sine waves.
Had that problem with helco in Hawaii. had to use a buck booster
between the building power and electronics not designed to handle
turd world power utilities.
but t
Jim,
You shouldn't be seeing that kind of variation in frequency unless
you're running really lightly loaded and/or your governor
sensitivity isn't set properly.
That unit has a mechanical or "droop" governor. It should be set for
around 63Hz at no load, with 60Hz at full load. You can adjus
Jim,
You shouldn't be seeing that kind of variation in frequency unless you're
running really lightly loaded and/or your governor sensitivity isn't set
properly.
That unit has a mechanical or "droop" governor. It should be set for around
63Hz at no load, with 60Hz at full load. You can adjust
In Jim's case, I don't think I'd want to compete against your kid in making
_anything_!
-
Max
Charleston SC
On Wed, Oct 7, 2015 at 9:53 AM, Jim Cathey via Mercedes <
mercedes@okiebenz.com> wrote:
> but they wouldn't recharge on my generator which tended to run
>> outside the 57-63 Hz
but they wouldn't recharge on my generator which tended to run
outside the 57-63 Hz UPS threshold for OK power.
IIRC, that is a bit of an issue. These things need a "Hey,
it's not _that_ bad" switch on them or something. Shut up
and eat your electrons...
Ironically, I have the worst problem w
25 matches
Mail list logo