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From: Alexandros K-K <nomorecolors@gm...> - 2007-04-30 11:14:44
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hello everyone. I am trying to use qucs (which in my mind seems to be the best of gui- driven, no hassle eda foss software) for a report i have. I hope you put up with my newbie questions a) Transient simulations. Dunno why i just cant make them work... even a simple one like http://users.ntua.gr/el04092/bah.sch b) I am also trying to make a dc analysis of the 741 opamp, but qucs doesn't like my voltage sweeping http://users.ntua.gr/el04092/1_2_apomonwths_dc.sch more to come :) any help highly appreciated alexandros |
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From: Stefan Jahn <stefan@gr...> - 2007-04-27 09:02:18
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Am Sa, 21.04.2007, 19:58, schrieb Hadi Esiely: Hello Hadi, > Do you Have any support for Thyristor components? You can build a Thyristor model on your own using two BJT's. Please see examples on: <http://qucs.sourceforge.net/download.html#example>; especially: <http://qucs.sourceforge.net/examples/sawtooth-discreet.sch>; Hope this helps, Stefan. |
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From: Hadi Esiely <hadesto@gm...> - 2007-04-26 22:54:41
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Do you Have any support for Thyristor components? thanks and great program! |
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From: Stefan Jahn <stefan@gr...> - 2007-04-25 11:25:27
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Am Mi, 25.04.2007, 10:06, schrieb Charles Joubert: > Hi all, Hello Charles, > I am trying to use qucs to simulate power electronics circuits with > very simplified models of "switches" (i.e. : diodes, thyristors, IGBTs, > MOSFETs...). Basically, in these models, the switch is either "on" > (constant resistance of low value) or "off" (constant resistance of high > value). The state of the component depends on its type and possibly > external conditions. > For example for a diode : > If Iak>0 => diode on > If Iak<0 => diode off > > This way of simulating components is classic in power electronics. It > is used for example in softwares like PSIM > (http://www.powersimtech.com/download.html). > > I tried to simulate a very simple rectifier. The "diode" is built with > a relay (files included). > > The problem is that I get this message : > WARNING: delta rejected at t = 1.001e-02, h = 1.000e-09 (no convergence) > > Is there a way to work around this ? Thanks ! Your diode model appears to be wrong. The non-grounded input terminal of the relay has to be connected with the A-port. Then it works fine. Cheers, Stefan. |
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From: Charles Joubert <charles.joubert@un...> - 2007-04-25 08:08:27
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Hi all, I am trying to use qucs to simulate power electronics circuits with very simplified models of "switches" (i.e. : diodes, thyristors, IGBTs, MOSFETs...). Basically, in these models, the switch is either "on" (constant resistance of low value) or "off" (constant resistance of high value). The state of the component depends on its type and possibly external conditions. For example for a diode : If Iak>0 => diode on If Iak<0 => diode off This way of simulating components is classic in power electronics. It is used for example in softwares like PSIM (http://www.powersimtech.com/download.html). I tried to simulate a very simple rectifier. The "diode" is built with a relay (files included). The problem is that I get this message : WARNING: delta rejected at t = 1.001e-02, h = 1.000e-09 (no convergence) Is there a way to work around this ? Thanks ! Charles JOUBERT |
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From: Tanguy Eric <eric.tanguy@un...> - 2007-04-23 21:31:33
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Le lundi 23 avril 2007 à 21:14 +0200, Stefan Jahn a écrit : > Am Mo, 23.04.2007, 20:52, schrieb : > > Hello! > > > I doon't know. Before qucs i used TKgate but i find out the in > > installation of fedora is qucs so i install whole development part(also > > qucs) > > How should i found my gcc/g++ and the libc headers are installed properly? > > I didn't package for Fedore and also have none at hand. > > Eric: Can you please help him to figure out what's missing? > > Thanks, Stefan. > Hello, if i remember well (i didn't use FC5 for a time) you have to install glibc-headers. Please don't hesitate to send mail to me if you still have problems. Thanks Eric |
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From: Stefan Jahn <stefan@gr...> - 2007-04-23 19:14:41
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Am Mo, 23.04.2007, 20:52, schrieb : Hello! > I doon't know. Before qucs i used TKgate but i find out the in > installation of fedora is qucs so i install whole development part(also > qucs) > How should i found my gcc/g++ and the libc headers are installed properly? I didn't package for Fedore and also have none at hand. Eric: Can you please help him to figure out what's missing? Thanks, Stefan. |
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From: Stefan Jahn <stefan@gr...> - 2007-04-23 16:40:21
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Am Mo, 23.04.2007, 13:44, schrieb : Hello! > I am just newbie with linux (fedora 5) and gucs. Analog cisrcuits are > fine bu i tried simulate any digital cir even simple AND it writes me > error during simulation > /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c > ++/4.1.1/i386-redhat-linux/bits/gthr.h:122: error: expected declaration > before end of line > > this is my .sch file > > <Qucs Schematic 0.0.11> > <Properties> > <View=0,0,800,800,1,0,0> > <Grid=10,10,1> > <DataSet=and.dat> > <DataDisplay=and.dpl> > <OpenDisplay=1> > <showFrame=0> > <FrameText0=N\x00E1zev> > <FrameText1=Nakresleno:> > <FrameText2=Datum:> > <FrameText3=Verze:> > </Properties> > <Symbol> > </Symbol> > <Components> > <AND Y1 1 270 180 -26 27 0 0 "2" 0 "1 V" 0 "0" 0 "old" 0> > <DigiSource S1 1 150 70 -35 16 0 0 "1" 1 "low" 0 "1ns; 1ns" 0 "1 V" 0> > <DigiSource S2 1 150 250 -35 16 0 0 "2" 1 "low" 0 "1ns; 1ns" 0 "1 V" > 0> > > please help It looks a bit like something is missing on your system. Is your gcc/g++ properly installed as well as the libc headers? Stefan. |
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From: <slimo@se...> - 2007-04-23 11:44:51
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I am just newbie with linux (fedora 5) and gucs. Analog cisrcuits are fine bu i tried simulate any digital cir even simple AND it writes me error during simulation /usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../include/c ++/4.1.1/i386-redhat-linux/bits/gthr.h:122: error: expected declaration before end of line this is my .sch file <Qucs Schematic 0.0.11> <Properties> <View=0,0,800,800,1,0,0> <Grid=10,10,1> <DataSet=and.dat> <DataDisplay=and.dpl> <OpenDisplay=1> <showFrame=0> <FrameText0=N\x00E1zev> <FrameText1=Nakresleno:> <FrameText2=Datum:> <FrameText3=Verze:> </Properties> <Symbol> </Symbol> <Components> <AND Y1 1 270 180 -26 27 0 0 "2" 0 "1 V" 0 "0" 0 "old" 0> <DigiSource S1 1 150 70 -35 16 0 0 "1" 1 "low" 0 "1ns; 1ns" 0 "1 V" 0> <DigiSource S2 1 150 250 -35 16 0 0 "2" 1 "low" 0 "1ns; 1ns" 0 "1 V" 0> please help |
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From: Stefan Jahn <stefan@gr...> - 2007-04-11 17:33:03
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Am Mi, 11.04.2007, 19:15, schrieb The Turner Family: Hi! > Interesting... So, I just placed a current probe on the line in myport2 > (see attachment) and everything works fine. I can deal with that. If I > want to stub out some functionality until it is defined, or perhaps create > a connector definition, I might just want some line passing through. Oh > well, I have my work around. You can disable components by selecting them, then press CTRL+D. A red cross indicates an open and a green cross indicates a short... So the gree one is your choice. :-) Cheers, Stefan. |
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From: Stefan Jahn <stefan@gr...> - 2007-04-11 16:52:27
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Am Mi, 11.04.2007, 17:10, schrieb The Turner Family: > Jahn, Hello Tim, > Thanks for the reply. Attached are the 2 sch files. I just took the sample > divider example and added the 2-port sub-circuit. I am not a EE, so it is > probably some simple concept that I am overlooking here. Hm. You hit a very special case. There are both ports the same node. Such a thing does not make any sense in fact. Putting a resistor with R=0 in between solves the problem. Currently I am unsure whether I should really modify the program code to fix this... Hope this helps, Stefan. |
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From: Stefan Jahn <stefan@gr...> - 2007-04-11 06:24:54
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Am Mi, 11.04.2007, 01:10, schrieb The Turner Family: > Hi, Hello! > I just tried creating and inserting my first sub-circuit - a 2-port where > p1 simple connects to p2. I donât get back a current in the simulation. > What am I missing here? Can you please send us the schematic as well as the expected output to demonstrate your problem? Thanks, Stefan. |
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From: The Turner Family <turner120995@ea...> - 2007-04-10 23:10:37
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Hi, I just tried creating and inserting my first sub-circuit - a 2-port where p= 1 simple connects to p2. I don=E2=80=99t get back a current in the simulati= on. What am I missing here? Thanks, Tim Turner =20 |
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From: Stefan Jahn <stefan@gr...> - 2007-04-10 06:52:49
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Am Mo, 9.04.2007, 21:00, schrieb Rick Spates: > Hello! Hi Rick, > One of my fellow developers is evaluating qucs for an upcoming project. > He is asking how a simple light bulb would be modeled or represented in > qucs. Can you provide some advice here? Please see: <http://sourceforge.net/mailarchive/message.php?msg_id=62642.62.245.209.118.1172054766.squirrel%40service.rules.org>; Hope this helps, Stefan. |
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From: Stefan Jahn <stefan@gr...> - 2007-04-05 05:31:30
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Am Do, 5.04.2007, 01:37, schrieb orbit: > Hi, Hello Paul, > I have tried to run some of the example schematics found on the qucs > website. I create a directory for them, put the .sch file there and it all > opens up > in qucs. When I try to open the .sch file, I get a "Wrong 'component' line > format!" > error. Hm. Which schematics did you try, and hich version of qucs are you using? > Also, can we use SPICE simulations with QUCS? I get the same error with > those too. Yes, you can use SPICE circuit to a limited extend. Please see: <http://qucs.sourceforge.net/docs/spicetoqucs.pdf>; <http://qucs.sourceforge.net/docs/S2Q_test1.pdf>; <http://qucs.sourceforge.net/docs/S2Q_test2.pdf>; <http://qucs.sourceforge.net/docs/S2Q_test3.pdf>; <http://qucs.sourceforge.net/docs/S2Q_test4.pdf>; All visisble at: <http://qucs.sourceforge.net/docs.html>; Cheers, Stefan. |
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From: orbit <orbital04@ya...> - 2007-04-04 23:37:25
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Hi, I have tried to run some of the example schematics found on the qucs website. I create a directory for them, put the .sch file there and it all opens up in qucs. When I try to open the .sch file, I get a "Wrong 'component' line format!" error. Also, can we use SPICE simulations with QUCS? I get the same error with those too. Thanks in advance, --Paul T. --------------------------------- Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. |
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