(a) An ideal single-phase two-winding transformer with turns ratio a t = N 1 / N 2 is connected with a series impedance Z 2 across winding 2. If one wants to replace Z 2 , with a series impedance Z 1 across winding 1 and keep the terminal behavior of the two circuits to be identical, find Z 1 in terms of Z 2 . (b) Would the above result be true if instead of a series impedance there is a shunt impedance? (c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance by a t 2 ?
(a) An ideal single-phase two-winding transformer with turns ratio a t = N 1 / N 2 is connected with a series impedance Z 2 across winding 2. If one wants to replace Z 2 , with a series impedance Z 1 across winding 1 and keep the terminal behavior of the two circuits to be identical, find Z 1 in terms of Z 2 . (b) Would the above result be true if instead of a series impedance there is a shunt impedance? (c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance by a t 2 ?
Solution Summary: The author calculates the voltage and current for a conventional two-winding single-phase transformer.
(a) An ideal single-phase two-winding transformer with turns ratio
a
t
=
N
1
/
N
2
is connected with a series impedance
Z
2
across winding 2. If one wants to replace
Z
2
, with a series impedance
Z
1
across winding 1 and keep the terminal behavior of the two circuits to be identical, find
Z
1
in terms of
Z
2
.
(b) Would the above result be true if instead of a series impedance there is a shunt impedance?
(c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance
by
a
t
2
5. Determine an expression for vo as a function of vs in the circuit shown below.
Assume the operational amplifier is ideal
(10 pts)
162
+
+
212
10052} -j 100-52
No
4. A 120 volt rms voltage source supplies 20 Amps rms to a load. The load requires
2,078 watts. What is the reactive power (Vars) and the power factor of the load.
Assume the load is inductive.
(15pts)
6. Determine the rms value of the voltage cyclical waveform shown below.
(15 pts)
Zv
N
시
ما
Msec
8
Chapter 3 Solutions
Power System Analysis and Design (MindTap Course List)
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