- #1
degs2k4
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Hello,
I have some doubts in the following problem of a transformer, specially on parts 2 and 4.
I would be very grateful if someone could please give me any ideas specially about those parts...
1)
Applying KVL in each mesh:
Mesh 1: V1 = jwL1I1 - jwMI2
Mesh 2: V2 = jwMI1 - jwL2I2
2)
power for RL?
First, apply KVL in each mesh:
Mesh 1 : V1 = jwL1I1 - jwMI2
Mesh 2 : 0 = jwMI1 - (jwL2 + RL) I2
get I2, and substitute it in the power function below:
P = V I2 = RL I2^2
Regarding M, I only know the formula of M = k sqrt(L1 L2).
I wonder if there is another way to get M...Any ideas ?
3) Z1?
V1 = Z1 I1
Z1 = V1 / I1
First, apply KVL in each mesh:
Mesh 1 : V1 = jwL1I1 - jwMI2
Mesh 2 : 0 = jwMI1 - (jwL2 + jwL) I2
get I2 from equation of Mesh 2, and substitute it in Mesh 1 equation.
After that, substitute V1 from Mesh 1 equation into the equation below:
Z1 = V1 / I2 =
So the result is:
Z1 = jwL1 + (w^2 M^2)/(jwL2 + jwL)
4) w?
I have absolutely no idea on how to do this part.
V and I in phase means : V = Vm cos(wt + 0), I = I am cos(wt + 0)
and an ideal trasnformer means that k =1 from the equation for M...
Any ideas for this part?
Thanks in advance!
I have some doubts in the following problem of a transformer, specially on parts 2 and 4.
I would be very grateful if someone could please give me any ideas specially about those parts...
Homework Statement
The Attempt at a Solution
1)
Applying KVL in each mesh:
Mesh 1: V1 = jwL1I1 - jwMI2
Mesh 2: V2 = jwMI1 - jwL2I2
2)
power for RL?
First, apply KVL in each mesh:
Mesh 1 : V1 = jwL1I1 - jwMI2
Mesh 2 : 0 = jwMI1 - (jwL2 + RL) I2
get I2, and substitute it in the power function below:
P = V I2 = RL I2^2
Regarding M, I only know the formula of M = k sqrt(L1 L2).
I wonder if there is another way to get M...Any ideas ?
3) Z1?
V1 = Z1 I1
Z1 = V1 / I1
First, apply KVL in each mesh:
Mesh 1 : V1 = jwL1I1 - jwMI2
Mesh 2 : 0 = jwMI1 - (jwL2 + jwL) I2
get I2 from equation of Mesh 2, and substitute it in Mesh 1 equation.
After that, substitute V1 from Mesh 1 equation into the equation below:
Z1 = V1 / I2 =
So the result is:
Z1 = jwL1 + (w^2 M^2)/(jwL2 + jwL)
4) w?
I have absolutely no idea on how to do this part.
V and I in phase means : V = Vm cos(wt + 0), I = I am cos(wt + 0)
and an ideal trasnformer means that k =1 from the equation for M...
Any ideas for this part?
Thanks in advance!