Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 57, Problem 5SQ
To determine
Explain whether the direction of the DC motor is reversed or not when the AC driving motor of a self-excited motor-generator set is reversed.
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Q4. Determine the Y-parameters at a frequency of 100 MHz for the two-port network
shown in figure 4. Present your answer in matrix form.
R1
R-10 m
са
C-20F
11
R2
C1
CF
1-10 H
R
12
C4
C-100 OF
C-50 F
Figure 4
Q3.
a) For the circuit shown in figure 3, use nodal analysis to obtain a
complete set of circuit equations, presenting your answer in
matrix form. Compute the potential across and the current flowing
through the ZL element, given:
IS = 12sin(wt) A, R1 = 30, R2 = 50, L1 = j4 Q, L2 = j10 Q
and ZL = (2+2)
b)
IS
R1
L2
Figure 3
w
R2
ZL
Using equations and text, define the two-port impedance
parameters.
Q3.
The circuit to study is shown in figure below, where
V1 10040° V, V2=50260° V, and
R₁ =3Q, R₂ = 502, R3 = 2, R450, Rs 50, Ls = 12.8 mH. Ls = 6.4 mH,C2 796μF and
C3 =796µF . assume f=50Hz
V1
R1
R3
03
R2
R4
C2
RE
L5
Vx
a)
Apply the mesh current method to obtain a complete set of circuit equations,
presenting your answer in matrix form;
b) Compute the potential across and the current flowing through the L6 elements.
Chapter 57 Solutions
Electric Motor Control
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