Keyboard Shortcuts
Likes
- LTspice
- Messages
Search
|
Henry's current transformer problem
Hello Henry,
From looking at the data sheet here are my guess for your CT core's physical parameters: Ae (core area) = 95mm**2 le (path length) = 66mm For LTspice the magnetic parameters are: Lm = 66m Lg = 5u (just a guess -- could be 1u to 20u -- adjust to match the inductance) For the magnetic parameters use (steel OR nickel-iron / permalloy): Bs = 1.8 or 0.8 Br = 0.5 or 0.5 (make this lower if there are convergence problems) Hc = 40 or 2.4 |
|
Re: LTspiceXVII released
¿ªÔÆÌåÓýWell, i tried to copy / rename my LTspiceIV.ini to LTspiceXVII.ini and XVII ignores it. Must be Some place else.
On 07/29/2016 05:56 PM, Andy
ai.egrps@... [LTspice] wrote:
-- AC2CL I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything. - Nikola Tesla |
|
Re: LTspiceXVII symbol import problem:
¿ªÔÆÌåÓýHi John I fingered it out. XVII puts em in a different location than IV: C:\users\username\My Documents\LTspiceXVII\lib\sym\ So, you can put your symbols folder below \sym there. I still havent found where is the .ini file. AFLC - another freakin learning curve! Al D. On 07/29/2016 05:00 PM, 'John Woodgate'
jmw1937@... [LTspice] wrote:
-- AC2CL I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything. - Nikola Tesla |
|
Re: Ferrite Beads
Hello,
The lib and sym files under "Program" are not used by LTspice. The real directory used by LTspiceXVII is in the personal folder "Documents". If a symbol is copied in this path, it's shown in the component selection without setting an extra path. C:\Users\Helmut\Documents\LTspiceXVII\lib\sym? C:\Users\Helmut\Documents\LTspiceXVII\lib\sub Best regards, Helmut |
|
Re: LTspiceXVII symbol import problem:
AL D wrote:
"...even copied just the files to the sym directory. XVII refuses to see them." That's because XVII doesn't pick the symbols and models from "c:\Program Files\LTC\LTspiceXVII\lib\..." any more. Instead, on installation, a job is run that creates a directory in "My Documents" called LTspiceXVII and the whole lib structure is just copied there. LTspice then picks all live lib information from there. The same batch job is run when you do a sync update. I guess I can understand why this is done, but for me, it's a real pain. The reason for my annoyance was that because I am running IV and XVII side by side, I wanted to sync the lib folders in each, so I symlinked the one under IV to XVII. When I realised what was happening when I did an update, I cancelled the update without letting it finish. I kinda wish I hadn't, because it left my entire lib directory structure full of 0byte files. Fortunately, because I do practice what I preach, I was able to restore everything easily from SVN. Personally, I find the new method of library management in XVII really inconvenient, but probably because I went against "conventional wisdom" in the first place. When I work out how to make it work for me, I'll let you know. In the meantime, I've reverted to IV until I figure it out. Regards, Tony |
|
Re: LTspiceXVII released
I am a work now, so I can't check home, but C:\Users\[me]\AppData\Roaming is where the LTspiceIV.ini has always been.? I make an edited, generic back up copy to store my settings because I always feared that a fresh install would overwrite whatever was there.? Sure enough, now that I've checked, LTspiceXVII.ini is there, too.
toggle quoted message
Show quoted text
I've had a problem at home with the ini file being trashed by during LTspiceXVII update attempts.? I can't remember where it is, though, without looking, which I can't do until later. ---In LTspice@..., <jmw1937@...> wrote : Analogspiceman says ?' I am running Windows 7 Home Premium 64 bit I-7.', so his .ini file is probably elsewhere. ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ? From: LTspice@... [mailto:LTspice@...]
Sent: Friday, July 29, 2016 8:55 PM To: [LTspice] group <LTspice@...> Subject: Re: [LTspice] Re: LTspiceXVII released ? ? ? ?"What is interesting is that my selection of this option managed to persist through a complete reinstall of the software.? The Control Panel's persistent settings must be stored in the registry or in a configuration file that does not get erased or overwritten.? I will have to go looking for where such items are stored with the new LTspice." ? All LTspice configuration settings are stored in the LTspice*.ini file where "*" = IV or XVII.? That file is in my user's AppData\Roaming directory. ?(There is a better pointer to that directory using environment variables, but I don't know it off-hand.) ?The file is NOT over-written by a re-install, so yes, it will retain your settings. ? LTspiceIV *can* store its settings in the Windows Registry instead, if you tell it to.? But by default, it doesn't touch the Registry. ? Regards, Andy ? ? |
|
Re: Ferrite Beads
? ?"It looks like added symbols to the installation folders will not be shown in the component-menu." I guess you are saying this is only an LTspiceXVII problem? When I add symbols to the library folders, LTspiceIV does see them.? I have not tried that with LTspiceXVII. I guess that from now on, we need to be clear which LTspice program we are talking about. ?:-) Andy ? |
|
Re: LTspiceXVII released
John Woodgate
¿ªÔÆÌåÓýAnalogspiceman says ?' I am running Windows 7 Home Premium 64 bit I-7.', so his .ini file is probably elsewhere. ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ? From: LTspice@... [mailto:LTspice@...]
Sent: Friday, July 29, 2016 8:55 PM To: [LTspice] group Subject: Re: [LTspice] Re: LTspiceXVII released ? ? ? ?"What is interesting is that my selection of this option managed to persist through a complete reinstall of the software.? The Control Panel's persistent settings must be stored in the registry or in a configuration file that does not get erased or overwritten.? I will have to go looking for where such items are stored with the new LTspice." ? All LTspice configuration settings are stored in the LTspice*.ini file where "*" = IV or XVII.? That file is in my user's AppData\Roaming directory. ?(There is a better pointer to that directory using environment variables, but I don't know it off-hand.) ?The file is NOT over-written by a re-install, so yes, it will retain your settings. ? LTspiceIV *can* store its settings in the Windows Registry instead, if you tell it to.? But by default, it doesn't touch the Registry. ? Regards, Andy ? ? |
|
Re: LTspiceXVII symbol import problem:
John Woodgate
¿ªÔÆÌåÓýWe VERY often tell people that this is usually due to Windows protection of files in the Program Files folder. Put your own stuff in the same folder as your schematic, or in a 'My Library' folder outside Program Files. ? With best wishes DESIGN IT IN! OOO ¨C Own Opinions Only J M Woodgate and Associates Rayleigh England ? Sylvae in aeternum manent. ? From: LTspice@... [mailto:LTspice@...]
Sent: Friday, July 29, 2016 9:10 PM To: LTspice@... Subject: [LTspice] LTspiceXVII symbol import problem: ? ? Ive discovered some odd behavior - |
|
Re: Ferrite Beads
Hello Andy,
I just repeated this case with the Laird-symbol. It looks like added symbols to the installation folders will not be shown in the component-menu. I have sent a message to Mike asking whether this is intended behavior. Let's see what Mike will answer. Alternatively one could copy the symbol and the model file to the schematic folder of course. Best regards, Helmut |
|
LTspiceXVII symbol import problem:
Ive discovered some odd behavior -
I had created a bunch of my own symbols in IV. Ive tried to copy my symbol directory to the sym dir. as well as to the Misc dir, and even copied just the files to the sym directory. XVII refuses to see them. Any of you experience this? Ive already emailed to "help" about this. Al D. |
|
Re: LTspiceXVII released
? ?"What is interesting is that my selection of this option managed to persist through a complete reinstall of the software.? The Control Panel's persistent settings must be stored in the registry or in a configuration file that does not get erased or overwritten.? I will have to go looking for where such items are stored with the new LTspice." All LTspice configuration settings are stored in the LTspice*.ini file where "*" = IV or XVII.? That file is in my user's AppData\Roaming directory. ?(There is a better pointer to that directory using environment variables, but I don't know it off-hand.) ?The file is NOT over-written by a re-install, so yes, it will retain your settings. LTspiceIV *can* store its settings in the Windows Registry instead, if you tell it to.? But by default, it doesn't touch the Registry. Regards, Andy ? |
|
Re: Ferrite Beads
bill.spence?wrote: ? ?"I have attempted to add the Laird Ferrite Bead Library to LTSpice without success." The ZIP file from Laird includes an LTspice symbol (.asy file), which differs from the one that comes with LTspice.? Make sure to use Laird's symbol. I think there are two things you need to do: .lib LairdTech_v2_0.lib (add that as a SPICE Directive to your schematic.) Then, edit "ModelName" on the symbol to be the name of the subcircuit you want to use.? For example: change it to?HI0805Q310R-10 if that is the bead model you wish to use. Also, make sure to have both the .asy file and the .lib file in the same directory with your schematic. This might not answer your question -- and there is more than one way to accomplish it.? If this doesn't help, it would help me if you show the error message(s) you got from LTspice.? It might point to the exact problem. ? ?"Looks like the Wurth ferrites in my LTSpice are encrypted." Are they encrypted for LTspice? Regards, Andy |
|
Re: Google groups
Helmut, As I remember the plans, it was to be held in reserve and inactive, until needed. The date of Apr 16 at 11:01 AM is near the end of a long discussion on Tekscopes. ? Leon Robinson ?? K5JLR Political Correctness is a Political Disease. From: "helmutsennewald@... [LTspice]" To: LTspice@... Sent: Friday, July 29, 2016 1:40 PM Subject: Re: [LTspice] Google groups Hello Leon, Have you ?looked at group.io? There is nothing to find about Tekscopes anymore in group.io. It seems they deleted this group. Best regards, Helmut |
|
Re: LTspiceXVII released
Hello Helmut,
I now understand the cause of the strange behavior.? I had "Enable beta circuit matrix operations" checked in the Hacks! tab of the Control Panel.? Apparently, among that option's various functions, it removes single component circuit islands. What is interesting is that my selection of this option managed to persist through a complete reinstall of the software.? The Control Panel's persistent settings must be stored in the registry or in a configuration file that does not get erased or overwritten.? I will have to go looking for where such items are stored with the new LTspice. ---In LTspice@..., <analogspiceman@...> wrote : Hello Helmut, V1 1 0 pulse(0 1 0 1u 1u .5m 1m) R1 2 0 1.5k *R2 2 0 1g .machine .output (2) V(1) < .5 .endmachine .tran 3m If I run the above netlist, it only produces 1mV on node 2, but the error log shows why: WARNING: Less than two connections to node 1.? This node is used by V1. WARNING: Less than two connections to node 2 of instance R1:? Node and device optimized out. If I un-comment R2, then it produces 1.5V on node 2.? This is unexpected.? Using the netlist exactly as shown in the Help file does not produce 1V as expected (at least for me). Your netlist shown below works as expected. ---In LTspice@..., <helmutsennewald@...> wrote : Hello analogspiceman, This works for me as I have expected. I don't see any mistake. V1 1 0 pulse(0 1 0 1u 1u .5m 1m) R1 2 00 1.5k .machine .output (2) V(1) < .5 .endmachine .tran 3m ? VX 00 0 0.1 Best ?regards, Helmut |
Tony Casey