Register to reply 
Capacitance of loops 
Share this thread: 
#1
Feb313, 06:32 PM

P: 79

Hi,
Does anybody know a nice formula for the capacitance of two metallic wire loops with equal radius R? (The center of the loops are above each other, their distance is d. The whole system is in vacuum) Thank you! 


#2
Feb313, 11:51 PM

P: 587

There will not be a nice formula for that.
If you just need the capacitance value of a specific geometry you can use the free field solver at http://www.fastfieldsolvers.com/. 


#3
Feb413, 06:28 AM

P: 3,135

Can you assume the radius R is >> d ?? In which case isn't this just the same as two parallel wires?



#4
Feb413, 06:46 AM

P: 79

Capacitance of loops
CWatters: yes, in that case it would be just two parallel wires. However I was looking for a general formula, that works when R ~ d as well. Actually, I'm trying to estimate the capacitance of a coil, because when you have a coil made of thick wire and you have just a few turns, it cannot be negected in general.
the_emi_guy: thank you very much for the software. It seems rather professional. It'll take some time to learn how to use it though. 


Register to reply 
Related Discussions  
Capacitance from capacitance matrix  Electrical Engineering  0  
Projected Capacitance Touchscreen, confused by how the capacitance is formed.  Electrical Engineering  4  
Capacitance of a body versus capacitance of inscribed and circumscribed spheres  Classical Physics  0  
Circuit with 2 loops, find the current in one of the loops  Introductory Physics Homework  2  
Loops '08 will be in the UK!  Beyond the Standard Model  13 