Recent content by willDavidson

Did you ever get this figured out?

I should've posted a sample of the circuit schematic. I've attached it here.

I am interested in modeling a battery charging/discharging. I am starting off with a simple model using a voltage source in series with a parallel RC branch which is in series with a resistor. I will be measuring the open circuit voltage between the last series resistor and the bottom of the...

Ok so the solution to this is the Lambert function. https://www.physicsforums.com/threads/solving-y-exp-y-constant.1001440/

Ahh thanks. I really wanted to know how to actually solve this thing so this will help a lot.

Ok thanks. I think my question from here may be more math related so I'll take continue the math topic there. I'm not sure how to link the thread in case anyone else is interested, but I'm really curious how to solve that thing. Even if I make some highly inaccurate assumptions to simplify it as...

I am trying to solve for J in the equation attached. I've also posted a link to the equation. The equation is to solve for J but both the left and right sides have J. I'm not quite sure how to solve that and it looks really messy so I simplified. Letting all of the terms equal either 0 of 1, I...

I was hoping to model a PV cell to look at the transient performance due to changes in irradiance due to issues like rapid shading since the response time of a PV panel is pretty much instant. I'll be using Matlab for this part which is why I'm interested in solving the equation referenced...

Yes, basically I would like to find a value along that curve. Looking at the equations for the single and double diode model, The equation for I has I wrapped up in the exponential as well. I'm not sure how to solve that or if I in the exponentials are a different I than the output current.

I would like to find the current at a given voltage.

Thanks, PVEducation is a useful. One of the parts that's got me on all of the equations is they seem to use the current (or current density) that you're looking for in the equation. Here I see J defined as the current density. There's also J01 and J02. I understand that I'm looking for J and J01...

I am looking at modeling a PV cell and I'm trying to understand the real difference between the single diode and double diode mode. I now realize that I don't fully understand the purpose of the diode in the model in the first place. I've just learned that it was there and went with it. I...

I was thinking it would be to limit the discharge current to the rest of the circuit. Placing multiple capacitors in parallel doesn't increase the charge each capacitor can/will store, so I don't understand how placing 1000 capacitors in parallel will effect the operation of one of the...

Ok will do. I just submitted a request so I'll let you know when I find out.

Good point on the discharging. Just out of curiosity, I think I'll contact them. Thanks again.