ECE419/619
Spring2012
HW#3Solution
Problem #1:
Vm
120 2
(1 cos )
(1 cos 45) 46.1 V .
2
2
V2
V
sin 2
b) P rms ; Vrms m 1
2
2
R
a) Vo
120 2
0.785 sin(2(0.785)
1
80.9 V .
2
2
80.92
P
65.5 W .
100
P 65.5
80.9
c) S Vs ,rms I rms (120)
0.674
97.1 VA;
ECE419/619
Spring2012
HW#2Solution
Problem #1:
a ) i (t )
Vm
V
sin(t ) m (sin )e t /
Z
Z
Z R 2 ( L) 2 122 (377(0.012) 2 12.8
L
1 377(0.012)
tan
0.361 rad
12
R
L 377(0.012)
0.377
12
R
i (t ) 13.2sin(t 0.361) 4.67e t /0.377 : 3.50 rad 201
tan 1
ECE419/619
Spring2012
HW#1Solution
Problem #1:
0
a) p(t)=v(t)i(t)= 40
0
0<t<50ms
50ms<t<70ms
70ms<t<100ms
T
b)
P
70 ms
1
1
v(t )i(t )dt 100ms 50ms 40dt 8W
T0
T
70
0
c) W
50
p(t )dt 40dt 800mJ ; or W=PT=(8W)(100ms)=800mJ
Problem#2:
P Vdc I avg
a ) I avg
ECE419/619Spring2012
Assignment4
Due:TuesdayApril3,2012at3:30pm,inclass
Test 1 revealed that most of you have problem drawing different waveforms for power electronic
circuits taught in the class. The purpose of this assignment is to make you more famili
ECE419/619Spring2012
Assignment3
Due:MondayMarch5,2012at12pm,in221BRiggsHall
1. For the controlled halfwave rectifier with resistive load, the source is 120 V rms at 60 Hz.
The resistance is 100 , and the delay angle is 45. (a) Determine the average volt