Solar cell Pspice

Bonjour Jo,

Can't write in French but understand it un petit peu. The only link that comes to mind is this, hopefully it helps a little:

Cordialement, Joerg

Use the model editor in PSpice

Regards

Klaus

Thanks a lot for your answer. I seen it before but what can I do with the netlist how can I use it. I would like to draw the same caracteristics and play with differents parameters. So I often saw netlist in forum telling about Pspice, but as I am a beginner I don't know what to do with this. May I use it in schematics and how? Usually I try to draw the same circuit and try to get the simulations I expect. The answer of Klaus show me a part of Pspice I had never used before. It will certainly help me but I have a problem for creating the .slb file. If ever you've got more links once again thank you.

Yours Sincerely

See "SUBCKT.SLB"

on the Subcircuits & Symbols page and

"SubcircuitImportByNetlist.pdf"

on the S.E.D/Schematics page of my website.

I use these techniques to import clients' circuits directly into my schematics rather than having to redraw circuitry that I'm not redesigning.

[CAUTION: I know it works with PSpice Schematics... wouldn't hold my breath trying to make OrCAD Capture do the same.]

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

Hello, I had never used it before. I tried to use it but now I have a new problem I modified the parameters of a 1N4002 diod and I changed the Rs param to 1e-6 but that's not enough to have a nice caract like this one

current ! ! ! ! ! ====== ---------!--------.voltage 0,7V Which param? which value?

Yours Sincerely

.

Yours Sincerely

What are you trying to do... make an IDEAL diode characteristic?

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

Great, I'm discovering the wide possibilities of Pspice I'll try this as soon as I can maybe after Easter. Each test is very difficult for me, I made many mistakes, sometimes it works but sometimes no and I don't know why.

Thanks.

Yes nearly I still want to have the voltage of 0,7 V because the model of a solar cell is this one:

and I think that the diod is just here for the non linearity of the I=f(U) caract. The ideal caract should look like a square but because of the differnt param of the diod I still have a slope in my model. ...Jo

Did you tried vinaiger to prepare a sausage Excuse me for the mistakes, It's a long time I didn't practice.

Jo, In your follow-up posts you need to leave some quoted text so we have a clue as to what you are talking about.

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

Hello Jo,

If you haven't worked with SPICE a lot it would make sense to subscribe to the Yahoo LTSpice group. It's free and over there in the file section you will find lots of information. There are many example projects where people made their own models, created sub-circuits and so on. Often there is more than one way to solve a particular problem in SPICE.

Regards, Joerg

"Joerg" a écrit dans le message de news:5ez%f.69534$ snipped-for-privacy@newssvr21.news.prodigy.com...

Sure. I already gave Jo 4 or 5 ways to create his almost ideal diode, but it seems he wants some more :-)

Apart from the obvious N/IS tweaking, a funny one was to put an ordinary diode on the secondary of an ideal transformer.

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Thanks,
Fred.

The diode should be a p-n diode characteristic where the voltage is something like I=Is*(e^(q*U/kT)-1), so it will not be really square. Solar cells ARE big diodes, so the diode is the right model, not some imaginary square function. If you make it really square then this will be a less accurate model. Also note that Is depends on temperature, and normally makes the temperature coefficient of the forward voltage have the opposite sign from what you would expect from just looking at the T in the formula.

Chris

No problem

The aim of my circuit is not to be a realistic model but a simple circuit easily understood by my students (16-18 year old). And they just know the ideal diode and don't understand the function e^. So I try to show them a model where they can measure the different parameters like loss of power in Rs and Rsh and when a cell is in the sadow. Jo