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Hi Andy-san!

I am yes.

Thanks your kind help.

My old email address (mr.shigematsu@...) is blocked in yahoo system,
I think.
But I do not know the method of unblock.
Yahoo's explanation or sentence was not easy to understand it.

Shiggy



2012/8/30 Andy<Andrew.Ingraham@...>

**


Shiggy-san,

I am not sure, but I think you are now saying that you have solved the
problem and can download the files you want. Is that correct?

If yes, very good. I'm glad you solved the problem.

If not, please ask again.

Andy

------------------------------------

Yahoo! Groups Links

monettsys wrote:

--- In LTspice@..., rainbowsally<rainbowsally@> wrote:

Here's how to run ltspice on your windows partition from your linux
partition.
Go here.

Get this. HOW-TO-SCAD3-IN-LINUX.zip

Is there any reason you don't simply install LTspice using Wine?

Yeah. Didn't know you could do that. :-)

And I'm using dialup and only my widows modem works.

Good info tho. Thanks.

Maybe I'm misunderstanding what you are doing, but whenevr I need to run LTspice in Ubuntu, I simply download the latest executable and tell Wine to install it. I usually put it in C:&#92;SWCADIII in the Wine folder.

Everything goes exactly the same as in WinXP. There is no need to convert line endings, and I can copy ASC and PLT files back and forth from XP running in VirtualBox to LTspice running in Wine.

The only thing is I don't know where Mike puts the SCAD3.INI file when running in Wine. He moved it from C:&#92;WINDOWS to solve a permissions problem in Win7, and I haven't had the occasion to reinstall LTspice so I don't know where it goes now.

Mike

I'm working on cleaning up the libraries. It's MUCH easier to drop down
to a terminal and get all the utilities in the world in linux. Windows
is like "hands off, ye peasants!" and everything takes ten times as long.

I'll get high speed internet someday but we were supposed to have fiber
optics for all our telephones about ten years ago and instead the
telecomm companies decided (after Congress agreed to let them overcharge
us $5 a month for caller id which only costs them 5 cents) to run our
communications through sattelites where they can get knocked out by
terroristas or even a big solar flare, but then that's not really what
we were talking about, I guess.

The libraries are mixed case, difficult to read, parameters aren't in
any particular order, so picking a transistor or a diode in the parts
selectors is basically impossible.

It's not a problem when running other folks 'asc' files, but it's murder
when you want to find a part and check on its price when you're
designing from scratch.

Hi Vlad-san!

I am very happy, because I have a communications with you.
I will consider every possibilities, I think.
I must say thanks to your knowlege, your honesty.

About near the attached file, I can not go ahead or finish the "Get Web
Access to LTspice".

Any way, thanks your e-mail.

Shiggy





2012/8/29 imbvlad <imbvlad@...>

**


Shigematsu-san,

That seems strange, indeed. If you're sure you don't have some virus, try
cleaning your temporary files and cookies, Java related ones, too (there
should be an applet in the Control Panel), or try a different browser.
Another solution is to make another Yahoo user and register with that one,
see if it works. You may also want to call some friends and ask them if
they get the same thing. I'm sorry, but that's about all I can suggest
right now.

Good luck,
Vlad

In message<k1jfi6+3mtl@...>, dated Tue, 28 Aug 2012,
coldcolor0317<coldcolor0317@...> writes:

The inductance is also a frequency dependent component. Yes, I
understand if it'snot air-core, there are many other factors.But that's
what we want to achieve, to include the turn-to-turn capacitance,
turn-to-housing capacitance, and leakage resistance etc. I used other
EM software to compute the L, then trying to match it with an equation
variable freq), then connect with driving circuit.

I hope you succeed, but I don't think your approach is correct. In
saying that 'the inductance is frequency-dependent' I think you are
confusing measured values with the elements of the model. Also, you need
to be clear whether you are going to model losses as a parallel
resistor, a series resistor or both (or perhaps something more complex).
Inductors don't have anything normally called 'leakage resistance'.

If that wasn't enough, a practical inductor that has significant
impedance at 100 Hz will self-resonate well below 10 MHz unless you take
truly heroic constructional measures to control capacitance.

Hello Helmut:

Thanks so much. I downloaded your model and tried in my circuit model. I think it worked. Of course the expression needs to be refined.
So I take it that for inductance, if it's L=4u*(freq/2.5e6)^(-0.5),
then when I use G2 (voltage controlled current),
I should define the value as Laplace=1/(S*L),
is it correct?
In a similar way, capacitance can be defined as well.

Best regards

Summer

--- In LTspice@..., "Helmut" <helmutsennewald@> wrote:

--- In LTspice@..., "coldcolor0317" <coldcolor0317@> wrote:

Vlad:

Thanks so much for the response. I do want to simulate an AC analysis from 100Hz to 10MHz. The coil is essentially an inductor with a certain value. There's AC resistance too. SO R is increasing with freq, and L is decreasing with freq. I need to model this behavior.
Would you please specify more on how to do it?

Many thanks,

Summer

Hello Summer,

The formula with FREQ doesn't work. You should use a Laplace
function. Below is an example using a G-source.

Laplace=1/(0.95*(s/(2*pi*2.5e6))**0.3+0.1)

I have uploaded an example.

Files > Temp > freq_dep_res.asc

Best regards,
Helmut

--- In LTspice@..., "imbvlad" <imbvlad@> wrote:

Hello

R=0.95*(FREQ/2.5e6)^(0.3)+0.1.

This is the way to do it in LTspice, too, unless you want an .AC analysis. If "freq" is some external source, v(freq), it will work. You may need to add curled braces, though.


Good luck,
Vlad