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Re: arbitrary solar cell model
--- In LTspice@..., "Hamed" <l0st_l0rd@...> wrote:
Is there some reason you model must be so complicated and do you really need to reinvent the diode model? Couldn't you do something like the following and put all us, your fellow group members and involuntary consumers of SPAM, out of our collective misery? [Or you could just feed us wafer-thin after-dinner mints... Gurgle, burp... Nah, I couldn't eat another thing, I'm absolutely stuffed! Now, SPAM off!] * Simple yet effective PV Array model (typical values) * * Rp sets voltage slope of curve * Rs sets current slope of curve * Isc is short circuit current * n = number of series cells * m = number of parallel strings .param Rp=1 Rs=3m Isc=10 n=60 m=1 I1 0 1 {Isc*m} D1 1 0 cell n={n} m={m} Rp 1 0 {Rp*n/m} .model cell d Rs={Rs} Is=315n n=1.26 Cjo=50u Tnom=25 Trs1=10m Trs2=0m1 |
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Re: arbitrary solar cell model
John Woodgate
In message <krgsbq+nfo3@...>, dated Tue, 9 Jul 2013, hamed <l0st_l0rd@...> writes:
Thanks friends for your responses but the point is that converting this circuit to schematics will make it more confusing.It couldn't possibly do so. If you want more help, please post the schematic. -- OOO - Own Opinions Only. See www.jmwa.demon.co.uk Why is the stapler always empty just when you want it? John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK |
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Re: arbitrary solar cell model
Thanks friends for your responses but the point is that converting this circuit to schematics will make it more confusing.
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actually the output should not have the distortion in -1.8kA ! and it should continue constant like a diode :) kind regards Hamed --- In LTspice@..., John Woodgate <jmw@...> wrote:
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Re: .measure script
--- In LTspice@..., "mbuni78" <mbuniltd@...> wrote:
Files > Tut > MEASURE 2) If there is a syntax error in the .meas file, does the whole script fail or only that particular .meas command?Only the commands which are wrong and of course the commands needing results from wrong previous commands. 3) Can I parameterize within a .meas command? E.g. canYes. Hello, Please try the mentioned examples. Best regards, Helmut |
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Re: A TVS does not work with load dump test??
Hi.
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You included TVS diode in parallel to the voltage source? Then, measure the diode current. If the source impedance is zero, the voltage limit is not. Put your project in the TEMP folder. Bordodynov. 09.07.2013, 14:38, "eqmqiq" <g9512728@...>: I try to create a general RC circuit with LED which is usually designed for car lamp use. A TVS(SMBJ24CA) is used for protect from voltage spike(parallel with input). I input a load dump voltage waveform into the circuit, but the voltage is not clamped by TVS, does anybody know what the problem is?? |
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A TVS does not work with load dump test??
I try to create a general RC circuit with LED which is usually designed for car lamp use. A TVS(SMBJ24CA) is used for protect from voltage spike(parallel with input). I input a load dump voltage waveform into the circuit, but the voltage is not clamped by TVS, does anybody know what the problem is??
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74F and 74ACT models
Hy guys
Does anybody know where it is possible to get some models of 74F and 74ACT units? I couldn't find anything in the group library. In a university project I should simulate and analyse the frequency spectrum and the cross talk characteristics by using these elements. In advance many thanks. Regards Misho |
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.measure script
Seems there has been quite a bit written about the .meas command which makes it hard to find specific information in previous posts.
Several questions that may have been already answered in the past: 1) Is there an example .meas script posted in the "Files" section that I may have missed? 2) If there is a syntax error in the .meas file, does the whole script fail or only that particular .meas command? 3) Can I parameterize within a .meas command? E.g. can I parameterize the start and end times for an average function. .param mbegin=5us mend=20us .meas Pout avg RLOAD6*I(R2)^2 from={mbegin} to={mend} Also "from=" and "to=" does not seem to be documented in any ltspice help documentation. I had to grab it off hspice documentation. Thanks. |
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Re: arbitrary solar cell model
John Woodgate
In message <krg4eh+9gdc@...>, dated Tue, 9 Jul 2013, sawreyrw <sawreyrw@...> writes:
No one is interested in a .cir file. If you want help, convert it to an .asc file and post that to the Files>Temp folder of this group.The file will run and 'Pick visible traces' allows output node voltages to be plotted. Both outputs have serious problems, output 2 is stuck at 0 V but output 1 'blows up' to quasi-infinite voltage. Some people can read netlists well, but I can't. -- OOO - Own Opinions Only. See www.jmwa.demon.co.uk Why is the stapler always empty just when you want it? John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK |
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Re: Possible to snap to lowest or highest point of plot?
--- In LTspice@..., "uoficowboy" <nleahcim@...> wrote:
Hello, You could use the MEASURE functions. The results will be in the log-file. View -> SPICE Error log .meas peak1 MAX V(..) .... There are many examples in the Files section. Files > Tut > MEASURE Best regards, Helmut |
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Re: inductance with a permeability in dependency of frequency
--- In LTspice@..., "Herbert" <afu@...> wrote:
Herbert, I'd like to help you, but I don't understand your question. What do you want to know? Rick |
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Re: arbitrary solar cell model
--- In LTspice@..., "hamed" <l0st_l0rd@...> wrote:
Hamed, No one is interested in a .cir file. If you want help, convert it to an .asc file and post that to the Files>Temp folder of this group. Rick |
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Re: OT/Left Field...
Nick:
I did not mean to be meen, I just presumed there had been no search done. I did also notice NGspice, and it does sound like a good option, especially in conection with google drive. It would allow you to design, simulate, and store results on line hopefully with minimal processing requirements. Tim On Mon, Jul 8, 2013 at 4:51 PM, Nick <nick@...> wrote: ** [Non-text portions of this message have been removed] |
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Possible to snap to lowest or highest point of plot?
Hi - I have been characterizing a couple circuits and have been manually trying to find the highest and lowest voltages and currents of a circuit I'm simulation. I'd love it if there was some sort of "snap" feature that would snap to the highest or lowest point. Or, similarly, if I could just get the highest/lowest points of waveforms to be displayed on the schematic itself.
Does anything like this exist? Thanks!! |
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Re: OT/Left Field...
--- In LTspice@..., Tim Jameson <tim@...> wrote:
I have found that Google is my friend. Anytime I start looking forGosh! I never thought of using Google or Wikipedia. Brilliant idea :) Sorry for the irony - I write Android apps and am a regular Wiki editor, so of course, I had done my research. Its personal recommendations that interest me, from people who understand SPICE and the technology that surrounds it... |
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Re: Feature Request: Option to preserve/reload plot settings after simulation run
And that is what I said I did. I did a cc to this thread to document that there is continuing interest in this thread and feature.
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--- In LTspice@..., "Helmut" <helmutsennewald@...> wrote:
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Re: OT/Left Field...
Ipad fans may be interested in Spicy. See:
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<> Howard On 7/8/2013 11:55 AM, Nick wrote:
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Re: OT/Left Field...
NGSpice Online looks like an interesting approach. See:
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<> The site provides the following sales pitch. This site allows you to run ngspice simulations from a web browser environment. Whether you are using a Windows, Linux, or Mac computer, a smart phone, or a tablet, you always should be able to run a SPICE simulation Howard On 7/8/2013 12:28 PM, Tim Jameson wrote:
Nick: |
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Re: OT/Left Field...
Nick:
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I have found that Google is my friend. Anytime I start looking for something, I start at google.com So, with that in mind, I went to google.com, and found Droid Tesla[1], another great place to look is wikipedia[2], the page on spice lists several implementations with source code[3]. These links were discovered in under 2 minutes. Please find the links as a great place to start. Tim [1] [2] [3] On Mon, Jul 8, 2013 at 11:55 AM, Nick <nick@...> wrote:
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Re: OT/Left Field...
Hi Nick
On 07/08/2013 12:55 PM, Nick wrote: I am getting fed up with lugging a laptop around when I also use a Yes, meetoo!!! As for an android "spice", theres Everycircuit: It works very well, though its not a traditional compatible spice. The gui is pretty slick. Other trade offs are that it has limited ckt space and its 10$ for the enhanced version. Its quite usable for smaller things. I do like it. Al D. -- 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 |
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