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You have to use PSCD.
Question 1)
A boost converter intends to convert a 5 V input into a 10 V output. Rated output power is 50 W. The specifications call for an output voltage of 10 V ± 0.1%, and the input current variation of no more than ± 01%. The switching frequency is 20 kHz.
1. Select an inductor and capacitor to meet these specifications.
2. Simulate the circuit in PSCAD. Calculate input current and capacitor voltage ripple 3. Make comments on the results obtained. Is the current ripple and voltage ripple
under ± 1% and 0.1% respectively.?
Question 2)
(use PSCAD, not PSpice) (In PSCAD simulations, plot the switch signal q, vL, iL, and vo in the steady state for 3 cycles).
I will send you the picture for the question.
Unformatted Attachment Preview
7-24 Using PSpice, simulate the full-bridge dc-dc converter shown in Fig. P7-24 using (a) PWM bipolar
voltage switching and (b) PWM unipolar voltage switching.
id
A
B1
La
Ra
+
VEMF
B
A2
B2
去
N
Nominal values: Va - 200 V
VEMF = 79.5 V
Ra = 0.379
La = 1.5 mH
1. (avg) = 10 A
f, = 20 kHz
duty-ratio D1 of TAI and TB2 = 0.708
(... Vcontrol = 0.416 V with Veri = 1.0 V)
Figure P7-24 From
reference 5 of Chapter 4,
"Power Electronics: Computer
Simulation, Analysis and
Education Using PSpice
(evaluation, classroom
version)," on diskette with a
manual, Minnesota Power
Electronics, P.O. Box 14503,
Minneapolis, MN 55414.
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Explanation & Answer
Attached below are my completed answer and the 3 required .pscx files (contianed in compressed WINRAR file).
Question 1:
1) Firstly, the duty cycle
of the switch can be calculated by:
V0 =
Vi
1−
5V
1−
5V
1− =
10 V
1 − = 0.5
= 0.5
10 V =
Since the output power is given to be 50 W , it follows that the average output current I 0 can
be calculated as follow:
P = V0 I 0
I0 =
P
V0
50 W
10 V
I0 = 5 A
I0 =
Hence, the current I s of the source is calculated to be:
I0
1−
5A
Is =
1 − 0.5
5A
Is =
0.5
I s = 10 A
Is =
Since we have only 1% for ripple within the input current, it immediately implies the following
calculation for the ripple of the curren...
Review
Review
Anonymous
I was having a hard time with this subject, and this was a great help.
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