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Re: [OT] Re: LTspice Install problem under linux

 

¿ªÔÆÌåÓý

Business Kid,
Yes: You are very OT as you don¡¯t answer to questions.
Sorry if you had never could understand W 98.
Don¡¯t you know that W 7 is just like Vista SR2?
I don¡¯t agree with you at all. Could you have a look on your very first question on this thread?
For me this topic is closed. I thought that this thread was about updating LTspice under Unix.Will Install Needless Data On Whole System
Ph.
Please: could? write something like Unix in the object of your mails about Unix? Not Linux or Unix and linux.
Subject: Re:[OT] [LTspice] Re: LTspice Install problem under linux

This problem in the topic is long solved, but . . .

The last windows I ran and maintained was windows 98. If one reinstalled or updated like that, junk seemed to collect, such that such that one smartalec explained windows as "Will Install Needless Data On Whole System."
I parted company with win98 & the BSOD about 2006. But I do believe windows does many things well these days, and one or two much better than linux (Graphics, for instance). I half liked XP and windows 7, but when I was buying laptops, they stuck me with vista and windows 8 :-((. Not much encouragement, I think you'll agree.
?


On 19 December 2013 15:08, Philippe Basier <basier.philippe@...> wrote:

?
Hello Business Kid,
?
You wrote:
¡°... that was a great way to clog up a registry with junk,
and end up with random files on your drive.¡±
?
I¡¯m not interested in Unix problems for many years.
But:
1/ How was it :
??? a ¡°...a great way to clog up a registry with junk¡± ?
?
2/ and why :
?? ¡° [that] end up with random files on your drive ¡° ?
Regards,
Philippe Basier.
?
?
Subject: Re: [LTspice] Re: LTspice Install problem under linux
?
?
> I have never EVER gotten the LTSpice web update to work in Linux, in any
> distribution. It may have worked a long time ago, but I just download the new
>.exe when I want to update.
>

It's the sort of thing I wouldn't try, as that was a great way to clog up a registry with junk, and end up with random files on your drive. Windows has got less inefficient, but old habits die hard.
?
?
--- In LTspice@..., <keantoken@...> wrote:
> I have never EVER gotten the LTSpice web update to work in Linux, in any distribution. It may have worked a long time ago, but I just download the new .exe when I want to update.
>

?
?
?
?
Re: A three Phase question please

John Woodgate
 

In message <l8vtuh+10srk7j@...>, dated Thu, 19 Dec 2013, smalcolmbrown@... writes:

The three phase is 36Vac 500Hz which really chucks a spanner in the transformer design.
The main issue is to get the thin laminations you need for 500 Hz. I suppose they are available, as used in aircraft transformers, but maybe really difficult to get in small quantities.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Re: A three Phase question please

 

¿ªÔÆÌåÓý


Le 20/12/2013 00:02, smalcolmbrown@... a ¨¦crit?:
?

Thank you John

The three phase is 36Vac 500Hz

Then you have got the voltage wrong. 36V ac translates as 50.9V amplitude.

which really chucks a spanner in the transformer design.

Does it?

Doubly so as I have no component values to go on from the schematics and the descriptive text is in German. I'm just having some fun guestimating values and seeing what happens. with the values i used and a SCR instead of a thyratron.

The example circuit was the minimum needed to demonstrate the problem.

Modify the simulate statement for .tran 0 100 99.98
You will see that all the problems you see in the first seconds, due to the initial current surge have disappeared.
Re: A three Phase question please

 

¿ªÔÆÌåÓý


Le 19/12/2013 23:02, John Woodgate a ¨¦crit?:
?

In message , dated Thu, 19 Dec 2013,
sawreyrw@... writes:


>Whether the magnetizing inductance is too low depends on the VA rating
>of the transformer.

500 mA with no load is too much anyway, I think,

In the absence of VA rating, it is presomptuous to venture a judgement whether the magnetizing current is too high or too small.

even if the full load current is 50 A.

Making the magnetizing current only 1/100th of the load current is a respectable performance

Also, the primary r.m.s. voltage is 56.6 V, not 62.3 V.

48.(1.732)/1.414=58.8


Still, never mind, eh?

With so many errors and uncertainties in the proposed circuit, it is difficult to have a sound judgement.

--
OOO - Own Opinions Only. With best wishes. See
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Re: A three Phase question please

 

Thank you John

The three phase is 36Vac 500Hz which really chucks a spanner in the transformer design. Doubly so as I have no component values to go on from the schematics and the descriptive text is in German. I'm just having some fun guestimating values and seeing what happens. with the values i used and a SCR instead of a thyratron.

The example circuit was the minimum needed to demonstrate the problem.
Re: A three Phase question please

John Woodgate
 

In message <l8vmqj+1p9b1hj@...>, dated Thu, 19 Dec 2013,
sawreyrw@... writes:

That current is correct.? It is due to the start up transient and the
DC component will eventually go to 0.?
I mean the 500 mA, not the 400 A in the original simulation. And the 'DC
component' doesn't go away entirely. The main transient is over by 1.4
s, but the positive peaks are 280 mA and the negative peaks are 240 mA
even up to 10 s.

Whether the magnetizing inductance is too low depends on the VA rating
of the transformer.
500 mA with no load is too much anyway, I think, even if the full load
current is 50 A. Also, the primary r.m.s. voltage is 56.6 V, not 62.3 V.

Still, never mind, eh?
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Re: A three Phase question please

 

John,


That current is correct.? It is due to the start up transient and the DC component will eventually go to 0.? Whether the magnetizing inductance is too low depends on the VA rating of the transformer.


Rick
Re: A three Phase question please

John Woodgate
 

In message <l8vjeg+tmtpa2@...>, dated Thu, 19 Dec 2013,
smalcolmbrown@... writes:


Thank you John?
I didn't realise that by 'lopsided' you meant that the waveform appeared
to have a large DC component.

There is still something not too good; your transformer inductance is
very low. Look at the primary current; 500 mA with no load. An
inductance of 10 H would be reasonable. Also note that the current is
'lop-sided' even with UIC. You actually have only a 2-phase system (V3
does nothing), with a non-optimum angle between the phases.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Re: A three Phase question please

 

Thank you sawreyrw


That really solved that one. I am glad that it is a simple fix :)



Thank you John?


For confirming what I thought was correct. :)


Thank you?Jerry Lee Marcel


For also confirming another rule of life :)

Suusi M-B
Re: A three Phase question please

John Woodgate
 

In message <l8vch8+10ue8vj@...>, dated Thu, 19 Dec 2013,
smalcolmbrown@... writes:

The question is is the lopsided waveform between ~A and ground an
accurate representation of a winding connected across a?

across any two of the phases?
There should not be a 'lop-sided' waveform anywhere. Whatever you do
with adding and subtracting sine-waves of the same frequency but
whatever phase, the result is another sine wave or zero.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
Re: A three Phase question please

 

Suusi,


What is happening is the voltage across the primary is not 0 at time=0, so you have a huge primary current at time=0.? Due to the long time constant it takes a long time for the primary imbalance to settle out.? You can avoid this problem by specifying UIC is the transient command.? Check Skip Initial operating point solution in the .tran window.


Rick
OT test

 

Sri, just a test, i don't see my messages.
Rudi

---
Ce courrier ¨¦lectronique ne contient aucun virus ou logiciel malveillant parce que la protection avast! Antivirus est active.
Re: A three Phase question please

 

¿ªÔÆÌåÓý

What do you mean "lopsided waveform"?
The traces I see are perfectly correct.
Indeed you can't take what happens at time-zero for granted, it could never happen in real life. Nature hates discontinuity.

Le 19/12/2013 19:05, smalcolmbrown@... a ¨¦crit?:

?

The question is is the lopsided waveform between ~A and ground an accurate representation of a winding connected across a?

across any two of the phases?

?

I was under the impression that the output was supposed to be symmetrical. That said it just an assumption, As I have not?dared put an oscilloscope on to the three phase to check. Or for that matter had access to the three phase either.


The file is in Files > TEMP >?3 Phase question > 3 phase query.asc


Any enlightenment and or help will be gratefully received. Thank you


Suusi M-B
A three Phase question please

 

The question is is the lopsided waveform between ~A and ground an accurate representation of a winding connected across a?

across any two of the phases?

?

I was under the impression that the output was supposed to be symmetrical. That said it just an assumption, As I have not?dared put an oscilloscope on to the three phase to check. Or for that matter had access to the three phase either.


The file is in Files > TEMP >?3 Phase question > 3 phase query.asc


Any enlightenment and or help will be gratefully received. Thank you


Suusi M-B
Re: [OT] Re: LTspice Install problem under linux

Business Kid
 

This problem in the topic is long solved, but . . .

The last windows I ran and maintained was windows 98. If one reinstalled or updated like that, junk seemed to collect, such that such that one smartalec explained windows as "Will Install Needless Data On Whole System."
I parted company with win98 & the BSOD about 2006. But I do believe windows does many things well these days, and one or two much better than linux (Graphics, for instance). I half liked XP and windows 7, but when I was buying laptops, they stuck me with vista and windows 8 :-((. Not much encouragement, I think you'll agree.



On 19 December 2013 15:08, Philippe Basier <basier.philippe@...> wrote:
?

Hello Business Kid,
?
You wrote:
¡°... that was a great way to clog up a registry with junk,
and end up with random files on your drive.¡±
?
I¡¯m not interested in Unix problems for many years.
But:
1/ How was it :
??? a ¡°...a great way to clog up a registry with junk¡± ?
?
2/ and why :
?? ¡° [that] end up with random files on your drive ¡° ?
Regards,
Philippe Basier.
?
Sent: Thursday, December 19, 2013 10:34 AM
Subject: Re: [LTspice] Re: LTspice Install problem under linux
?
?

> I have never EVER gotten the LTSpice web update to work in Linux, in any
> distribution. It may have worked a long time ago, but I just download the new
>.exe when I want to update.
>

It's the sort of thing I wouldn't try, as that was a great way to clog up a registry with junk, and end up with random files on your drive. Windows has got less inefficient, but old habits die hard.


--- In LTspice@..., wrote:
>
>
> I have never EVER gotten the LTSpice web update to work in Linux, in any distribution. It may have worked a long time ago, but I just download the new .exe when I want to update.
>

?

?
Re: Membership renewal problem ....

 

for aurora_viii,

I did, and the administrator merged my complaint to an existing
similar complaints (a lot, not just my) on their website. That means,
it is not a scam, it is a real issue. ... How I mentioned in my previous
e-mail? I could activate my membership throgh my second e-mail
address, sbcglobal. Now, everything is okay.

Thanks,
Peter
Re: Membership renewal problem ....

 

Martin,

Not really, I could not access to the group anymore through my old yahoo account. But I could activate my group's membership through
my existing sbcglobal account ... Thanks for advices guys.

Merry Christmas ...
Peter
Re: Odd behaviour when attempting to simulate an LTC3633 switching regulator.

 

I do not understand how a 1uH can be too large.? according to the formula provided in the datasheet (for an output current ripple of ~40):

l=(vout/(f*ripple curent))*(1-(vout/vin))
l=(1.1/(4*0.039))*(1-(1.1/12))
l=6.39uH

Can anyone shed some light on this?
Re: LTspice Install problem under linux

 

¿ªÔÆÌåÓý

Hello Business Kid,
?
You wrote:
¡°... that was a great way to clog up a registry with junk,
and end up with random files on your drive.¡±
?
I¡¯m not interested in Unix problems for many years.
But:
1/ How was it :
??? a ¡°...a great way to clog up a registry with junk¡± ?
?
2/ and why :
?? ¡° [that] end up with random files on your drive ¡° ?
Regards,
Philippe Basier.
?

Sent: Thursday, December 19, 2013 10:34 AM
Subject: Re: [LTspice] Re: LTspice Install problem under linux
?
?

> I have never EVER gotten the LTSpice web update to work in Linux, in any
> distribution. It may have worked a long time ago, but I just download the new
>.exe when I want to update.
>

It's the sort of thing I wouldn't try, as that was a great way to clog up a registry with junk, and end up with random files on your drive. Windows has got less inefficient, but old habits die hard.


--- In LTspice@..., wrote:
>
>
> I have never EVER gotten the LTSpice web update to work in Linux, in any distribution. It may have worked a long time ago, but I just download the new .exe when I want to update.
>

?
?
Switch ... on - Switch... off

 

I cannot understad the functionality of this statements. Nothing from help, could someone explain that?
Many thanks, Enrico
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