Maker Pro
Maker Pro

Where can I simulate AC circuits?

eehelp150

Oct 9, 2016
5
Joined
Oct 9, 2016
Messages
5
Is there a program or website I can use to double check my AC circuit work?
 

eehelp150

Oct 9, 2016
5
Joined
Oct 9, 2016
Messages
5
hi
welcome to EP

tell us more about the circuit ... voltages etc ?

The circuit looks similar to this. I am going to do it by hand to find Va and Vb but would like to use a solver or program to make sure I got the right values.
CGjynHR.png
 

Alec_t

Jul 7, 2015
3,587
Joined
Jul 7, 2015
Messages
3,587
LTspice (a free download from Linear Technology).
 

hevans1944

Hop - AC8NS
Jun 21, 2012
4,878
Joined
Jun 21, 2012
Messages
4,878
Use Xc = 1 / jωC and Xl = jωL. Pick a frequency for ω and solve for C and L using the specified reactances on your diagram. Plug the values into the LTSpice program.
 

eehelp150

Oct 9, 2016
5
Joined
Oct 9, 2016
Messages
5
Use Xc = 1 / jωC and Xl = jωL. Pick a frequency for ω and solve for C and L using the specified reactances on your diagram. Plug the values into the LTSpice program.
Does this look right?
W = 100 rad/s
-j2 -> 0.005F
-j10 -> 0.001F
j4 -> 0.04H
GTyhaAg.png
 

hevans1944

Hop - AC8NS
Jun 21, 2012
4,878
Joined
Jun 21, 2012
Messages
4,878
What does the LTSpice simulation say, compared to your paper calculations? Do the two node voltages agree? How about the loop currents?
 

eehelp150

Oct 9, 2016
5
Joined
Oct 9, 2016
Messages
5
What does the LTSpice simulation say, compared to your paper calculations? Do the two node voltages agree? How about the loop currents?
I simulated the circuit and get this: (I have no idea how to read this)
AbU7maa.png

I've only gotten this far in my paper calculations:
40j + 20 - 12Va*j + 2Vb *j +4Va - 4Vb = 0
and
2Vb - 2Va - 6Vb*j - 4Va*j-10-20j
 
Last edited:
Top