ECE433, Homework 4
Due: April 19, 2013
1) Given a 3-phase rectifier that has = 100 rad /sec. The amplitude of the
source voltage is 220V, and L=1 mH. The average output voltage out of the
rectifier is 350V.
a) Determine the dc current out of the rectifier
ECE433-Exam 1, February 21, 2013, 6:30-8:00 PM
Name: PUID:
Note: For each question, you have to develop the mathematical equations and show the
comprehensive work to get the credit. Do not write any nal equation without showing the
procedure. Otherwise,
1,
ECE433-Exam L, February 22,2012,6:00-7:45
Name:
pM
PUID:
Note: For each question, you have to develop the mathematical equations and show
the comprehensive work to get the credit. Do not write any final equation without
showing the procedure. otherwise
ECE433 Quiz 1 January 30, 2013
Name: PUID:
1) Given the following converter, assume that at any instant the switch will move between
position 1 and 2, with a switching frequency of fSW and a duty cycle of 50%.
/ [4 )
(ii) Determine the average va
ECE 433 Homework #3
1) Given a boost converter with an input voltage of 5 volts and a desired output voltage of 10 V
with a load of 100 W. Assume the switching frequency is 100 kHz, L = 1.1 Lcrit, determine C so
that the ripple voltage is less than 1% of
ECE 433 Homework #2
1) Determine the switching characteristic (I versus V) for an IGBT, Thyristor, and GTO.
2) Prove that KVL and KCL hold for average values. Specifically, the averages of voltages in a
loop sum to zero and the averages of currents into/o
ECE 433 Quiz 1
1) A circuit with a series resistor (1 ) and inductor (1 H), has current through the elements of i(t) = 1 + cos(10t) A.
a) Determine the maximum instantaneous power delivered to the inductor.
b) Express the average power dissipated by the r
Lf a4tA
(
ff
c 4 D '-N o =a
brv
oFF
0L br '
4
Uu(ubtj
Dt"-o"M 7'at?'b
D
rP \)c(vubu+
tla
v-b
t 0t
Ps:f
DS
'-at -_4 d=W
P; 0;.":'fF
,C,
ouk
*o
W
sinu&+Y!u'*,:
W+. 'h"v\tn^ =hr+'Vf
N nt >' w(,&*\'
Three-Phase Full Brdge Rectifiel'with ldeal Source
ls =
0
:
F'u
.J
5
D5,D6
!
ii
Dl,vz
D2,D3
rlt
:
I
i D3,Dt 1,D5
D5.D6; D6.DI
't
I
Diode Currnt in Three-Phase Full Bridge Diode Rectfier
6
-i.
(-r
lr
f\
=l=-A'^r\-
\
'S^"1
-.r
S
\-r_t
\a
\
$\>$
P
.'NF
S
\
t
"
f\:.
5'
s-n'=
'rL-'
\r /,
=
r.F
'
C/J
^\s')' s
i!
c
g\
\
_)
fcfw_t ali' l-J
Lsf,
, cdnrry&r,rr,tr(rM
(*'
^ffi^
u nb"
rly!.r#,W\|,:ffi#:
I
l
s6o
Urh>q
w(wurt _l. or o q& on '
^ <ua'l, ,o#nn
D6,
conwahbn at urrl &ro^ D6ta aL
qj&b)'
rntrrrurP
,A
Wd(, 2/rt, sltrt 'frt
05, ob
:
,T,
Dh/D I
:
05, DL,DI
i qn'
on
'
len
hxp,(vn E qLuvdl,et u'ntv'1t aP ll.e
'4.-hft9
de-\'r'e
tLs -l- I ry
J
Ctf,f
t
WT
irs
?r l-^j
Vu.r
(vo,t>=
F
tn[ 'ro'l ]i:
C,Sy
.
.: | - )ut L 5'Lourt
.
16r^
4 4n,*),$m ur9
,4t,t/rilr(k
1rrt)
-*ok
sw
arCiaJc
a
s616
,
Lait
t
1Jcfw_t
-l
L oui
I
\
nn/e . the
1,
ECE433-Exam L, February 22,2012,6:00-7:45
Name:
pM
PUID:
Note: For each question, you have to develop the mathematical equations and show
the comprehensive work to get the credit. Do not write any final equation without
showing the procedure. otherwise
EcE433-Midterm#2, APril 11, 2011
Name:
PUID:
L) True/False (10 pts).
Briefly explain your answer and your judgment. Otherwise you do
not get the credit.
l-l)For a tolerance-band current controlle-d inverter, the switching frequency depends on the
;ni ux n
Project 2: Analysis of PWM Inverters
Due: April 6, 2012
NOTE: Sharing the codes or reports is prohibited. In Project 1, there were a few cases with
similar reports. You have to present your own work to get the credit for the project. In
case of plagiarism
ECE 433- Project 3
Project#3 is a team-work research project on one of the suggested topics. Each team consists of
3 students to do the following tasks:
1) Choose one of the topics
2) Understand the basics of operation of the chosen circuit and its corres
ECE433- Quiz 4 - March 23, Z0lz
Name:
PUID:
For a UNIPOLAR PWM H-bridge inverter, shown in Fig. I (sinusoidal and triangular waveforms
shown
in the next page):
a) Specify the modulation index and the frequency ratio.
'fa=
+
k
:
D,q+
@
= o'B =o,B
Vtrt
1f"*
ECE433, Homework 1
Due Monday Jan 28th, 2013
1) Given the following waveform:
Express f(t) as a Fourier Series. Then use MATLAB to construct the signal from the Fourier series you
derived to verify your result.
a) For the waveform shown, by providing enou
ECE433, Homework 2
Due: Feb. 18, 2013
1) In the converter of Fig. 3, the switches operate synchronously, each is in position 1 for
, and in position 2 for
. Derive an expression for the voltage conversion
ratio ( )
. Sketch M(D) vs. D and compare with tha