Deciphering complex capacitor circuit

Thread Starter

maxn

Joined Dec 14, 2005
1
Would you please recomend a simple method for finding an equivalent capacitance of a complex circuit with capacitors only? I am having a hard time, knowing how to redraw the circuit diagram and establishing correct relationship between the capacitors(parallel vs series). Of course this causes me to get a wrong calculated value for equivalent capacitance. The example I have read so far, have few (5) or less capacitors, with capacitor relationship very obvious to a beginner like myself. My homework problems have more than 5 with lines going all kind of ways (clearly made this way to confuse us). How do I read the lines or diagram of complex circuit correctly. I thought I understood junctions splits of the circuit diagram. But I keep getting major errors.
Please help. Thank you much. Sincerely.
 

pavelari

Joined Jan 11, 2006
5
i can't understand your question very well but i think, you need from substitute diagrams like:

/c1, 1 μ F, 24v/ and /c2, 2 μ F, 24v/, series is equal to one capacitor /c, 1 μ F, 48v/
in parallel /c, 3 μ F, 24V/

principe: in paralel voltage is the lowest in series the capacitet is the lowest
in paralel sum the capacitet in series sum voltage
 

alim

Joined Dec 27, 2005
113
Originally posted by pavelari@Jan 11 2006, 06:21 AM
i can't understand your question very well but i think, you need from substitute diagrams like:

/c1, 1 μ F, 24v/ and /c2, 2 μ F, 24v/, series is equal to one capacitor /c, 1 μ F, 48v/
in parallel /c, 3 μ F, 24V/

principe: in paralel voltage is the lowest in series the capacitet is the lowest
in paralel sum the capacitet in series sum voltage
[post=13033]Quoted post[/post]​
What you have most likely is a series prallel circuit. identify the parallel circuit/s solve it/them and solve for a series cct. with resultant parallel value/s in place.
 

pavelari

Joined Jan 11, 2006
5
Originally posted by alim@Jan 11 2006, 09:57 AM
What you have most likely is a series prallel circuit. identify the parallel circuit/s solve it/them and solve for a series cct. with resultant parallel value/s in place.
[post=13041]Quoted post[/post]​
send to me a principal cct and what you want to know ...
 

chesart1

Joined Jan 23, 2006
269
Hi,

Like others have said, the actual circuit presented in the problem would help.

Here are a few ideas:

If your circuit or any portion of it resembles a wheatstone bridge, you could use the bridge formulae found in your text book.

Likewise, if a portion of the circuit resembles a T network or a PI network, you could use the corresponding formulae from your textbook.

John
 

DC2002

Joined Jan 24, 2008
1
Hmm , assuming that there are no simple series or parallel combinations that could be solved with the series,// formulas. like a bridge circuit made only of capacitors , you could give the circuit an operating frequency and then find the capacitive reactance (Xc=1/(2piFC) ) then use the delta to wye (pi to t) conversions ... solve for an equivalent reactance , then use the Xc=1/(2piFC) to find the C , I guess
hope it helps
DC
 
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