Recent content by Edy56

Please only respond if you know the node voltage method. I need to write equations for this circuit. My problem is that 1 has two paths towards 3, so when I write equations do I write both of those paths or only one. U30(1(-jXc1)+1/(jXl1+R1)+1/(jXl2)-U10((1/(-jXc1)+1/(R1+jXl1))-U20.... (the...

this is getting a bit too complex for my level lol

I am not too sure because we havent been taught that we can do that, but going from the videos I have seen, it would do the same thing

no Xm= X12 which is mutual coupling. to my knowledge, since this is coupled coils Ul1=jXl1*I1 +\- jXm*I2 Ul2=jXl2*I1 +\- jXm*I1

In the circuit determine the complex powers of the coupled coils.

So my attempt was I1*jXl1+I2*jXm=I2*(jXl2-jXc2) + I1*jXm because they are parallel so they should have the same voltage. I got I1=-3*I2. I know that J=6-j4 and that J=I1+I2 so I just plugged in what I got and I ended up getting the result for I2 and I1. But they are not correct. Why? I am given...

Okay i have another problem. I have to determine complex power of the Xc1. I have calculated that U10=5 (this Is correct) I know that Xc1=5 So logically I=U10/-jXc1=j Sc=1/2*-jXc1*|I|^2 Sc=1/2*-j5 Sc=1/2*-j5 - this Is not correct, whyy I am supposed to get 25*(-j)/2

solved it now, thank you

okay so I do have numerical values, I did not show them because I am just interested in just knowing how to solve for (Uab)0. As for the nodes, I don't know what to tell you. That's just how we are told to solve problems. Here is the "formula":

I might be making a mistake somewhere, but I do not see it nor do I understand it. So if you could tell me where I am wrong so I can try to see why I would be thankful because I had been at this problem for 5 hours now and I really do not see where I am making mistakes.

I am not guessing. I am using the node potential method.

U10*(1/(jXl1+R1)+1/(-jXc))-U20*(1/jXl1) = -E1/(jXl1+R1) U20(1/(R1+jXl1)+1/(-jXc2))-U30(1/-jXc2)-U10(1/(jXl1+R1)= J+ E1/(jXl1+R1) + E2/(-jXc2) are these correct then? I removed E3 and R3

I have seen that in similar cases when calculating (Uab)0 they also add the generator. But that doesn't make really sense to me. There is no current flowing through it, and I get that te generator doesn't necessarily need it, but where does the voltage come from? Voltage is current * resistance.

So I have calculated Zab which is 3-3j (it's correct). Now I have to calculate (Uab)0. This is where I just get completely lost. In my opinion: (Uab)0=E3+I3*R3+Ic1*Xc1+E4 Note: I recognize these currents are not shown in the picture, but based on their indexes and basic logic I hope you...

Zener Is because it requires 5.6 volts and sicillium one always does.