Re: Is direct contact okay?
Bordodynov and analogspiceman If you could please direct Email me at HKafeman@..., then I can give you some more details of the CT, etc.
Thanks and Regards
Henry Kafeman
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Re: Is direct contact okay?
Hello Henry Kafeman.
The primary winding of the current transformer comprises a single turn. The current transformer is loaded by a small impedance in magnitude (relative). The consequence of this effect strong demagnetization. Therefore, the effect of magnetic saturation of the core needs huge currents.
Bordodynov.
29.07.2016, 14:46, "4vl7aujnwrex7ropketfjd7le5afsie4zyue7rcb@... [LTspice]" <ltspice@...>:
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analogspiceman
Thank you for your reply.
Yes we want to avoid saturation, but we are using the Current Transformer in two modes, for Energy Harvesting and Measurement. To this end we are changing the load it is connected to between the Modes and also switching in varying Burden resistance values.
Hence we would like to try to model the behaviour across a wide range of Primary currents to see the effect and to make sure that we understand what is happening and whether saturation becomes an issue. Also we need to understand the effect of a wide range of operating temperatures....
I have asked the manufacturers if they can supply the relevant details for the model, but so far, they do not seem to be able to give me anything more than the basic details and a test result excitation curve!
Thanks and Regards
Henry Kafeman
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Re: Is direct contact okay?
analogspiceman
Thank you for your reply.
Yes we want to avoid saturation, but we are using the Current Transformer in two modes, for Energy Harvesting and Measurement. To this end we are changing the load it is connected to between the Modes and also switching in varying Burden resistance values.
Hence we would like to try to model the behaviour across a wide range of Primary currents to see the effect and to make sure that we understand what is happening and whether saturation becomes an issue. Also we need to understand the effect of a wide range of operating temperatures....
I have asked the manufacturers if they can supply the relevant details for the model, but so far, they do not seem to be able to give me anything more than the basic details and a test result excitation curve!
Thanks and Regards
Henry Kafeman
|
Hello Helmut, Try the second example from Help (just paste it into an empty schematic as SPICE text).? It is true that the outputs will sum together like current sources, but the value of the load resistors has no effect on the output amplitude.? Please try it and report back. ---In LTspice@..., <helmutsennewald@...> wrote : Hello analogspiceman, > The state machine appears to have a bug.?? > The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.?? > For example: ....
I have asked Mike about the 1mV.?
-- The state machine puts out milliamps, not amps.? That is the way it is supposed to work. --Mike
Best regards, Helmut
.?
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It's obviously a very small state, like Monaco or the Vatican. (;-) ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ?
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From: LTspice@... [mailto:LTspice@...]
Sent: Friday, July 29, 2016 11:42 AM
To: LTspice@...
Subject: [LTspice] Re: LTspiceXVII released? ? Hello analogspiceman, > The state machine appears to have a bug.?? > The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.?? I have asked Mike about the 1mV.? The state machine puts out milliamps, not amps.? That is the way it is supposed to work. --Mike Best regards,
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Hello analogspiceman,
> The state machine appears to have a bug.?? > The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.?? > For example: ....
I have asked Mike about the 1mV.?
-- The state machine puts out milliamps, not amps.? That is the way it is supposed to work. --Mike
Best regards, Helmut
.?
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Hello Fernando,
I guess ?the native Mac-version will lag the PC-version for quite some while.?
You could use the Windows LTspiceXVII with WINE or CrossOver on the MAC. ?
Best regards, Helmut
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Hi to all, LTspice XVII is for windows only. Will be compatible for Mac OS X???
Thanks. Fernando.
-- Un saludo. Fernando
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Re: LTspice XVII problems...
keantoken wrote:
"Also the Help dialog comes up but none of the help pages will show. I
think this could be a misconfiguration somewhere in Linux but I don't know
where."
If the Help doesn't load, you need to install wine-gecko into the same WINEPREFIX as LTspice. Wine-gecko implements a cut-down sort of Internet Explorer.
It used to be possible to force the LTspice CHM Help file to be displayed by a native Linux CHM viewer like kchm with a registry hack, but this stopped working a couple of years ago and I haven't tried it since. You can similarly coerce most applications running in WINE to use a native Linux application for specific file types, i.e. PDFs by a similar (WINE) registry hack.
Regards,
Tony
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Re: LTspice XVII problems...
keantoken wrote:
"Any thoughts on why it would not detect my 64-bit system?"
The 64bit LTspiceXVII will only be installed if you've taken the trouble to create a 64bit WINEPREFIX. Left to its own devices, WINEPREFIX will default to win32, therefore the X86 will be installed. If you just install all Windows application into default .wine environment, you will only get 32bit versions.
To create 64bit WINEPREFIX and install 64bit LTspiceXVII there, you type this in a terminal window:
env WINEPREFIX=$HOME/.ltspice64 WINEARCH=win64 wine "path-to-LTspiceXVII-installer"
I have noticed that even when the 64bit version is installed, a sync update pulls in the 32bit executable as well.
Regards,
Tony
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Hello Vlad
See the help with keyword "state"? [ .MACHINE -- Arbitrary State Machine ] in LTspice XVII
Regards
PhB
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> --- LTspice? Announcements ---
> LTspice XVII runs on 32- or 64-bit editions of Windows 7, 8 or 10.
> Windows XP is not supported. Windows XP users can run LTspice IV,
> which will still be available in observance of Linear Technology
> Corporation's zero obsolescence tradition.
> Mike Engelhardt
> Manager of Simulation Development
> Linear Technology Corporation
XVII runs fine in Wine 1.2.2 in Ubuntu 10.04. This version is from
April, 2010 and it only supports Win 95 to Win XP.
Mike
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Re: vc pot with internal resistance
Hello Vlad
You wrote :
"(it's unclear to me what that "p" means in A's formula, maybe 2 misspelled? "
Isn't it pi ?
Regards
PhB
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Hello analogspiceman
> The state machine appears to have a bug.? The nominal output amplitude is 1mV rather than 1V, so the output equations must be multiplied by 1k.? For example:
>
> .output (2) (V(1)<.5)*1k
> .output (3) (V(1)>.5)*1k
> .output (4) state*1k
What is this state machine? LTspice says "unknown control card .output...". I tried with a notmal voltage source, then with a NAND gate, the help has nothing on .output, the net seems to have no answers. How do I get there?
Vlad
______________________
-- holding, among others:
a universal analog/digital filter, block-level models
for power electronics (and not only), math blocks
with a more stream-lined approach, some digital
ADC, DAC, (synchronous-)counter, JKflop, etc.
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Re: vc pot with internal resistance
Hello Helmut
> Your example has roughly 1% of full scale non-linearity in the wiper-position versus control voltage.
>
>
What's necessary to modify in the atanh() function to get a
potentiometer which is exactly proportional to the control voltage?
I simply looked at the manual's expression for the level=2 switch which suggested that applying atanh() should correct it (it's unclear to me what that "p" means in A's formula, maybe 2 misspelled?). Still, note that, even if V(x) looks linear, the total resistance, as seen from V2's side, is simply awful. I'll be playing with this a bit, see where it goes, maybe the behavioural resistors can be avoided, after all? Wouldn't it have been nice to be able to specify your own transfer function, but have it calculated internally, something like Flux=f(x) or Q=f(x)...
Vlad
______________________
-- holding, among others:
a universal analog/digital filter, block-level models
for power electronics (and not only), math blocks
with a more stream-lined approach, some digital
ADC, DAC, (synchronous-)counter, JKflop, etc.
|
Re: LTspice XVII problems...
Hello
> Hello. I'm running 64-bit Linux, Debian.
> LTspice installs the x86 version, not the x64 version.
> The simulation command editor also mangles all the commands, replacing them with mangled copies of the .tran command.
>
Also the Help dialog comes up but none of the help pages will show. I
think this could be a misconfiguration somewhere in Linux but I don't
know where.
> Any thoughts on why it would not detect my 64-bit system?
Sounds like your wine install is incomplete, at least it seems to lack the mono package. Wine should have asked you to install it when running wine for the first time. Also, LTspice asks you which version you want to install, so it's a user choice. I'd recommend trying to force the installation in a new "wine bottle" (another WINEPREFIX and/or WINEARCH), then, if that fails, delete current wine configuration and installation (apt-get --purge autoremove) and clean reinstall. I'm not a guru, though, so take this with a tiny grain of salt.
Vlad
______________________
-- holding, among others:
a universal analog/digital filter, block-level models
for power electronics (and not only), math blocks
with a more stream-lined approach, some digital
ADC, DAC, (synchronous-)counter, JKflop, etc.
|
Hello Yann,
Please always download LTspiceXVII and LTspiceIV from the official web page.
Best regards, Helmut
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Hello Mike,
It looks really great. Just one question: where can we download this new version of LTspice, please?
Many thanks for your efforts to provide this wonderful tool ;-)
On 29 July 2016 at 00:07, panamatex@... [LTspice] <LTspice@...> wrote:
?
??????? --- LTspice? Announcements ---
The major new release of LTspice is today.
LTspice XVII is partial rewrite of LTspice IV with
a modern graphics library for native multi-monitor
support. XVII also includes:
? - 64-bit support
? - UNICODE (use any character of any living language)
? - New device equations(IGBT, diode soft recovery, and
??? an arbitrary state machine)
? - Improved GUI: Editors for most SPICE commands
? - Extensions to Microsoft Windows for schematic'
??? thumbnail previews
?
LTspice XVII runs on 32- or 64-bit editions of Windows 7,
8 or 10.? Windows XP is not supported. Windows XP users
can run LTspice IV, which will still be available in
observance of Linear Technology Corporation's zero
obsolescence tradition.
Also, I see what looks a malicious software distributed
using the Linear Technology Corporation trademark of
LTspice.? It purports to be a LTspice IV repair tool.
Please inform me at LTspice@... if you have been
impacted by this.
?? Mike Engelhardt
?? Manager of Simulation Development
?? Linear Technology Corporation
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Re: Storing and retrieving use symbols
Hello Gordc,
The solution is simple.?
Download the new LTspiceXVII and set the extra symbol directories in the "Control Panel".
Best regards, Helmut
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Hello Jim,
>?Any word about Mac version?
I guess ?the Mac version will lag the PC for quite some while.?
Best regards, Helmut
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Tony Casey
Yann Garcia