INE2601_MajorTest1_S2_2023_Question
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School
University of South Africa *
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Course
INE2601
Subject
English
Date
Nov 24, 2024
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Pages
2
Uploaded by DeanHippopotamus1341
INSTRUCTIONS TO ALL STUDENTS:
1.
Applicable Graduate Attribute:
Welcome to the School of Engineering.
NB you may download your paper from the myUNISA site!
MAJOR TEST: 1
2023 /Semester 2
Course: INE2601
INDUSTRIAL ELECTRONICS II
Examiner: Dr Etienne A Feukeu
Moderator: Mr K Reddy
External Moderator:
Marks: 50 MARKS
Weight of Assessment: 35
UNIVERSITY OF SOUTH AFRICA
SCHOOL OF ENGINEERING
CONTINUOUS ASSESSMENT
Question 1: [10 + 3 + 5 = 18]
1.1 - PE units can be classified in a variety of ways, one of the simplest being to classify them
according to their input /output requirements. Briefly describe and define the role of each
block [10]
1.2 -State the three conditions required by the thyristor to turn on [3]
1.3 -Clearly explain the concept of latching in the thyristor control circuit [4]. Also draw the
thyristor gate circuit [1].
Question 2: [8]
Name the advantages and disadvantages of the GTO [8]
Question 3: [14]
For the single-phase, full-wave, uncontrolled rectifier shown in Figure below, the supply
voltage is 200 Vac, 50 Hz. The load resistor is 33
Ω, calculate:
(a)
Draw the waveform of the supply current, the load current and the load voltage.
(b)
The average values of the output voltage and current.
(c)
The rms values of the output voltage and current.
(d)
The dc power consumed by the load (P
dc
) and the average values of the power delivered
to the load (P
ac
).
(e)
Sketch the load voltage and the diode waveforms
Question 4: [2.5 + (1.5x5) =10]
The single-phase half-wave-controlled rectifier supplies a resistive load with an average
current draw of 1.35 A. If the converter is operated from 190 Vac, 50 Hz supply and if the
average value of the output voltage is 65 Vdc, calculate:
a)
The firing angle alpha
b)
The load resistance
c)
The rms load voltage
d)
The rms load current
e)
DC power
f)
The ripple factor
[Total = 50]
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