Isolated, regulated, toroidal step down transformer AC power supply design.

[Mark]

Ah, and here is Bob 'the decider'.

Simple judgements. No plausible arguments required.

Bob wishes you to know that he is 'the decider'.

The one who "get to decide what others should accept or believe".

By Order: 'Das Führer'.

 

[Brian g]

"Mark" [email protected] wrote:-


Chase it Kittty ...chase it!

****** Oh dear oh dear!!!

Wotta wanker!!

Brian g

 

[Mark]

I'd disagree with it, only because what you speak isn't true.

Here's one that sold on EBay for only $51.00, a few minutes ago:

http://cgi.ebay.com.au/LIEBERT-UPS-GXT700-Mini-Tower_W0QQitemZ230113036855

If you go to http://gxtwebdemo.liebert.com/ you can see from the simulation
of the GXT series UPS that it regulates, rectifies and inverts the output
24/7. The Bypass is only engaged during battery failure or replacement.

Yup, I'd say that qualifies. Online and near perfect sine wave output.

I would have bid but I don't feel like a drive up to Sydney to get it.

With a bit of patience I'll pick one up for even less. Fact.

But why don't we just pretend this never happened. A convenient <snip> and
it's all forgotten.

 

[Mark]

Kittty is only pretending ...chase it!

Get back under your bridge, troll.

 

[Mark]

"Brian gross-wit" <[email protected]> who coun't think of
anything cleaver, thus spake:

...a **** is a ****.

 

[jasen]

The plain ordinary sense of what I said and the truth of the matter are both
in my favour.

no matter,
no favour.

This was what seemed to be confusing "Swanny", originally. When he retorted
"No it isn't." to my claim that I had already given the explanation he
requested about 1/2 dozen times in the same thread. I had. Possibly all the
explanations (which are still there) appear BELOW this point. IE. 'Reader'
software does not necessarily present statements in chronological order.

true but there are optiona available to the author that can help.


Bye.
Jasen

 

[Mark]

In this case, as indeed in ALL cases, the topography I chose would have made
ABSOLUTELY NO DIFFERENCE to Swanny's dilemma.

ALL my explainations would STILL appear BELOW this point, irrespective of
the internal topography of the individual postings.

Is that clear?

makes absolutely no difference t

 

[Mark]

Kitty is just pretending. ..chase it, Kitty, chase it! ..Meow.

 

[swanny]

The specific voltage multiplier I am looking at is a Half-wave Voltage
Doubler, or more accurately, two of them.


Here is the general description of Voltage Multipliers from the Electrical
Engineering Training series: http://tpub.com/neets/book7/27m.htm

Yes, I know how they work. Are you sure they are going to work in your application?

As Phil mentioned, and as your article also mentions:

"Also any small fluctuation of load impedance causes a large fluctuation in the
output voltage of the multiplier. For this reason, voltage multipliers are used
only in special applications where the load is constant and has a high impedance
or where input voltage stability is not critical."

Will the input to your regulators always be above 17VDC for all load conditions
of your application?

It is TWO Half-wave Voltage Doublers. I have Emailed the schematic to
[email protected] in pdf format. I can't think of any easy way to
publish it here. Enjoy the Spam.

Gee, thanks [email protected], you really are a vindictive prick.

p.s. What does a wolf in sheep's clothing do over the Easter break?

I've no idea, maybe you could enlighten us?

 

[Mark]

What are you, fucking Irish as well as stupid?

If a question is borne NOT from ignorance (of the possible answers), THEN it
would be a TROLL by definition.

YOU are the **** who started removing the spam-blocker from my Email
address, and so I return the deed. Enjoy the spam, ****.

Your next witty response has me dangling on the edge of my seat. Brilliant
as usual, Brian.

 

[Mark]

Well apparently you do know how they work.

Phil had no idea. "Totally impossible bollocks
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" was his retort. 'Totally impossible' has
only ONE meaning.

...but that didn't stop him mouthing off about it AS IF he knew 'how they
work'. Never does, AFAICT.

What DID surprised me was just how many 'Phil-O-philes' were prepared to
'dig-in' with him in what became effectively, 'trench warfare'. Gives me the
IMPRESSION that they were as wrong about it as he was.

I have recorded at least three cases of contributors were OVERTLY wrong
about it, but nobody attacked them. Why? Perhaps it is a question that you
do not wish to address HONESTLY.

++++ OK, rant terminated here ++++

Will the input to my regulators always be above 17VDC for all load
conditions of my application? Yes, I believe so. Or at least close to that
mark.

I haven't been able to measure the input as yet. I go into town this Friday
to take my son in to hospital for his weekly physio session, I'll try to buy
a small set of alligator clips for my DMM from Dickie Smiths at that time.
The chances of shorting across any two of the Regs pins (with the power ON)
whilst probing amongst numerous obstacles is perilous and I won't do it
without the clips.

Sorry about the spam actually, but I did want you to know where I had sent
the schematic and I can't post a link to Picture Trail or My Space because
they don't host PDF formats.

If anyone can think of an easy way to publish a PDF file here, tell me and
I'll do it.

 

[swanny]

Will the input to my regulators always be above 17VDC for all load
conditions of my application? Yes, I believe so. Or at least close to that
mark.

I haven't been able to measure the input as yet. I go into town this Friday
to take my son in to hospital for his weekly physio session, I'll try to buy
a small set of alligator clips for my DMM from Dickie Smiths at that time.
The chances of shorting across any two of the Regs pins (with the power ON)
whilst probing amongst numerous obstacles is perilous and I won't do it
without the clips.

OK. Once you have done that the picture will be clearer. See if you can measure
the input to the regulators both at low or no load and then at your maximum
anticipated load.

 

[Bob Parker]

OK. Once you have done that the picture will be clearer. See if you can measure
the input to the regulators both at low or no load and then at your maximum
anticipated load.

This is going to drag on for months, isn't it? :-( Maybe I'll check
back here in about August and see if any sanity has returned to this
newsgroup.

Bob

 

[jasen]

In this case, as indeed in ALL cases, the topography I chose would have made
ABSOLUTELY NO DIFFERENCE to Swanny's dilemma.

ALL my explainations would STILL appear BELOW this point, irrespective of
the internal topography of the individual postings.

Is that clear?

top postings are rarely clear.

 

[jasen]

I'd disagree with it, only because what you speak isn't true.

Here's one that sold on EBay for only $51.00, a few minutes ago:

Yup, I'd say that qualifies. Online and near perfect sine wave output.

I would have bid but I don't feel like a drive up to Sydney to get it.

It might have gone to $55 or $60 if you had bid add shipping to that
and I wouldn't say it's around $30

Bye.
Jasen

 

[Mark]

Pussy 'Sponge-Bob' prancing about the feet of 'Das Führer' in the kingdom of
'Phil-O-phile' mewing "But where is the sanity?".

 

[Mark]

What utter, utter face saving piffle.

Every few months a FLOOD (dozens) of x-Govt UPS hits the EBay market,
driving the price down to the ground. A USED, sine wave output, online UPS
is CHEAP AS CHIPS because SUPPLY EXCEEDS DEMAND for them. Business and Govt.
Departments won't buy a used UPS.

The fact of the matter is that Online, sine wave output, UPS regularly sell
on EBay for ABOUT that price. In an AUCTION the price can go UP or DOWN
dependant only on supply and demand at that TIME.

Even if you are unlucky enough to buy one with dud batteries, they are
literally STUFFED with high value salvage parts.

 

[Bob Parker]

Pussy 'Sponge-Bob' prancing about the feet of 'Das Führer' in the kingdom of
'Phil-O-phile' mewing "But where is the sanity?".

Idiot troll.

 

[Mark]

Oh, we have Albert fucking Einstein here for sure. Read the thread.

 

[Poxy]

What utter, utter face saving piffle.

Every few months a FLOOD (dozens) of x-Govt UPS hits the EBay market,
driving the price down to the ground. A USED, sine wave output, online UPS
is CHEAP AS CHIPS because SUPPLY EXCEEDS DEMAND for them. Business and Govt.
Departments won't buy a used UPS.

The fact of the matter is that Online, sine wave output, UPS regularly sell
on EBay for ABOUT that price. In an AUCTION the price can go UP or DOWN
dependant only on supply and demand at that TIME.

Even if you are unlucky enough to buy one with dud batteries, they are
literally STUFFED with high value salvage parts.

Sorry, been away from this for a while - WTF are you talking about? Are you
still gabbing on about your "sick kid" or something? Why does he need a UPS
all of a sudden? And given you admittedly know SFA about electronics, what
value to you is a dead UPS "stuffed" with parts you wouldn't have a clue how
to use?