Ineprac2 TL - 2021

INEPRA2/101/0/2021
Tutorial letter 101/0/2021
Industrial Electronics II (Practical)

INEPRA2
Year Module
Department of Electrical and Mining

Engineering
IMPORTANT INFORMATION:
This tutorial letter contains important

information about your module.
BARCODE
CONTENTS
Page
1 INTRODUCTION ..........................................................................................................................3
2 PURPOSE OF AND OUTCOMES ................................................................................................3
2.1 Purpose ........................................................................................................................................3
2.2 Outcomes .....................................................................................................................................3
3 LECTURER(S) AND CONTACT DETAILS ...................................................................................3
3.1 Lecturer(s) ....................................................................................................................................3
3.2 Department ...................................................................................................................................4
3.3 University ......................................................................................................................................4
4 RESOURCES ...............................................................................................................................4
4.1 Prescribed books ..........................................................................................................................4
4.2 Recommended books ...................................................................................................................4
4.3 Electronic Reserves (e-Reserves) .................................................................................................4
4.4 Library services and resources information ...................................................................................4
5 STUDENT SUPPORT SERVICES ................................................................................................5
6 STUDY PLAN ...............................................................................................................................5
7 PRACTICAL WORK .....................................................................................................................5
8 ASSESSMENT .............................................................................................................................5
8.1 Assessment criteria .......................................................................................................................5
8.2 Assessment plan ...........................................................................................................................5
8.3 Assignment numbers ....................................................................................................................6
8.3.1 General assignment numbers .......................................................................................................6
8.3.2 Unique assignment numbers.........................................................................................................6
8.4 Assignments due dates .................................................................................................................6
8.5 Submission of assignments...........................................................................................................6
8.6 The assignments ...........................................................................................................................8
8.7 Other assessment methods ........................................................................................................13
8.8 The examination .........................................................................................................................13
9 FREQUENTLY ASKED QUESTIONS.........................................................................................14
10 SOURCES CONSULTED ...........................................................................................................14
11 IN CLOSING ...............................................................................................................................14
12 ADDENDUM ...............................................................................................................................14
2
INEPRA2/101/0/2020
1 INTRODUCTION
Dear Student
Welcome to the subject Industrial Electronics II (Practical) (INEPRA2) at UNISA. This tutorial
letter serves as a guideline to this subject. It provides you with general administrative
information as well as specific information about the subject. Read it carefully and keep it safe
for future reference. We trust that you will enjoy this course.
2 PURPOSE OF AND OUTCOMES

2.1 Purpose
The future will see exciting developments in the generation of electrical power. Renewable
energy sources such as electrical solar panels, wind generators and fuel cells will become more
and more part of the landscape where humans are active. The power from these sources are all
dependant on environmental conditions (sunlight, wind, load variations and temperature) and
require the storage of power in various storage technologies during times of excess generation,
so that the power can be used at times when the generation is inadequate. Co-generation of
power, where all of the different technologies generate power into a common grid that is also
supplied from conventional generation technologies such as coal, gas, hydro and nuclear power
stations, presents special problems of its own. The various power generation technologies
produce power ranging in frequency from DC to higher than 60 Hz. Loads are motors, chemical
processes, IT equipment, telecommunication equipment, furnaces, illumination, heating, etc.
Some loads require DC, others a varying frequency, different voltage levels, high currents, etc.
Power electronics is the interface between all of the various components mentioned above and
is tasked to convert energy from the available form to the form that the load requires. This has
to be done as efficiently as possible. Industrial Electronics 2 serves as an introduction into this
world of power conversion, enabling a student to become knowledgeable about components,
topologies and techniques that are used in power electronics.
2.2 Outcomes
• An understanding of the principles of power electronic converters.

• An understanding of power electronics devices and their application in
power electronic converters.
• Ability to analyse and synthesise simple power electronic converters.
• Ability to select active power electronic devices against a specification.
3 LECTURER(S) AND CONTACT DETAILS

3.1 Lecturer(s)
Your Lecturer for Industrial Electronics II is Ms N Nqukwe. She can be contacted at the
following number for any subject related questions:
3
e-mail: nqukwnq@unisa.ac.za
Contact Times: Mon – Fri: 08h00 – 21h00
Sat: 09h00 – 21h00
3.2 Department
Department of Electrical and Mining Engineering: electrical&mining@unisa.ac.za
3.3 University
If you need to contact the University about matters not related to the content of this module,
please consult the publication My studies @ Unisa that you received with your study material.
This brochure contains information on how to contact the University (e.g. to whom you can write
for different queries, important telephone and fax numbers, addresses and details of the times
certain facilities are open).Always have your student number at hand when you contact the
University.
4 RESOURCES
4.1 Prescribed books
The prescribed book is the same as for INE2601. Industrial Power Electronics 2nd or 3rd edition
by Janse van Rensburg
4.2 Recommended books
There are no recommended books for this module.
4.3 Electronic Reserves (e-Reserves)
There are no electronic reserves for this module.

4.4 Library services and resources information
For brief information, go to www.unisa.ac.za/brochures/studies
For detailed information, go to the Unisa website at http://www.unisa.ac.za/ and click

on Library.
For research support and services of personal librarians, go to

http://www.unisa.ac.za/Default.asp?Cmd=ViewContent&ContentID=7102.
The library has compiled a number of library guides:
• finding recommended reading in the print collection and e-reserves –

http://libguides.unisa.ac.za/request/undergrad
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INEPRA2/101/0/2020
• requesting material – http://libguides.unisa.ac.za/request/request

• postgraduate information services – http://libguides.unisa.ac.za/request/postgrad
• finding, obtaining and using library resources and tools to assist in doing research –
http://libguides.unisa.ac.za/Research_Skills
• how to contact the Library/finding us on social media/frequently asked questions –
http://libguides.unisa.ac.za/ask
5 STUDENT SUPPORT SERVICES
Important information appears in your my Studies @ Unisa brochure.
6 STUDY PLAN
Use your my Studies @ Unisa brochure for general time management and planning skills.
7 PRACTICAL WORK
This module covers the practical part.
8 ASSESSMENT
8.1 Assessment criteria
Your final mark will be calculated by using a ratio of 10% year mark and 90% Portfolio mark.
8.2 Assessment plan
The assignments are as follows:

• Assignment 1:Registration Form for INDUSTRIAL ELECTRONICS II (Annexure
A)
• Assignment 2:Send in your portfolio or attend a practical workshop.
Submission of both assignments is compulsory.
The final mark is based on all the assignment marks obtained and their contribution
towards the final mark are as shown in the table below:
ASSIGNMENT NUMBER CONTRIBUTION TOWARDS FINAL SUBJECT

MARK
1 (Compulsory) 10 %
2 (Compulsory) 90%
TOTALS =100%
5
Submission of Assignment 1 “allows” you to complete a practical assignment, which is the
examination for this subject.
Ensure that you understand this principle. Failure to submit Assignment 1 by the due date, will
result in you being barred from handing in a practical assignment and you will have to reregister
for this subject. If in doubt, contact your lecturer before the submission date!!!!
8.3 Assignment numbers
8.3.1 General assignment numbers

Assignments are numbered consecutively per module, starting from 01.
8.3.2 Unique assignment numbers
Assignment 1: 549133
(Compulsory)
Portfolio: 729466
(Compulsory)
8.4 Assignments due dates

THE CUT-OFF SUBMISSION DATES FOR THE ASSIGNMENTS ARE :
Assignment 1 (Annexure A- 16 April 2021

Registration form) (Compulsory)
Assignment 2 – Results of experiments 15 September 2021

Portfolio(Compulsory)
If you submit an assignment online, please submit in PDF-format.

8.5 Submission of assignments
A practical assignment must be submitted or a practical workshop must be attended. The

dates on which the workshops will be held will be included in tutorial letter 301. The
practical experiments, which much be completed if you do not attend a workshop, is
included in this tutorial letter. A mentor must be chosen and the mentor form must
accompany the assignment when it is sent in. (See ANNEXURE B)
If you have submitted your registration form without a date being selected, please
contact Ms L Visser URGENTLY via e-mail lvisser@unisa.ac.za or 011 471 2854
with a date, if a date is not provided you will NOT be scheduled for a workshop.
NO EXCEPTIONS OR CHANGES WILL BE MADE

WITHOUT A VALID PROOF AS TO WHY YOU COULD
NOT ATTEND THE WORKSHOP, AS EXAMINATION
RULES APPLY!!
Please make sure to write your student number in the space provided on the form.
6
INEPRA2/101/0/2020
For detailed information and requirements as far as assignments are concerned, see the
brochure my Studies @ Unisa that you received with your study material.
Your e-mail address should also be provided in clear and neat handwriting, as
communication might be sent to from time to time.
Tutorial letter 301, with the workshop dates, will be uploaded onto myUnisa:
• Go to myUnisa.
• Log in with your student number and password.
• Select the module.
• Click on official study material
• Go to Tutorial letter 301.
To submit an assignment via myUnisa:

• Go to myUnisa.
• Log in with your student number and password.
• Select the module.
• Click on assignments in the menu on the left-hand side of the screen.
• Click on the assignment number you wish to submit.
• Follow the instructions.
To complete a module both the theory and practical must be passed. You have the
following options available to do the practicals:
• You can attend the practicals arranged by UNISA. These are only available at certain
venues and you have to book a spot by submitting assignment 1 as stipulated in the
tutorial letter, or
• You can complete the practicals at your workplace or another suitable training facility
on your own, with a suitable mentor (preferably ECSA registered). You need to
submit a portfolio for assessment with the Mentor’s Form.
Assignment 1 must be submitted by all students, whether you want to attend a

workshop or not.
7
8.6 The assignments
REGISTRATION FORM FOR INDUSTRIAL ELECTRONICS II

PRACTICAL WORKSHOP/COMPLETION OF PRACTICAL
ASSIGNMENT 2020
PLEASE COMPLETE IN CLEAR BLOCK LETTERS & SEND IN AS A

NORMAL ASSIGNMENT
FROM Surname/Initials
STUDENT NUMBER
POSTAL ADDRESS
POSTAL CODE
TEL NO (WORK)
TEL NO (HOME)
MOBILE
e-mail
Indicate preference with an X:
I want to attend the practical workshop
I want to do the practical assignment on my

own
The date, according to the workshop

schedule, on which I will attend the _________________________________
workshop?
ONCE A STUDENT WAS ALLOCATED TO A SPECIFIC DATE, NO CHANGES WILL BE

MADE.
SIGNATURE OF LEARNER …………………….. DATE: …………………….
8
INEPRA2/101/0/2020
ANNEXURE B
1. POLICY FOR PRACTICAL ASSIGNMENTS
a. All experiments have to be performed.
b. In order to receive a pass mark, the student need to receive a sub-minimum of 50%.
c. All students must have their own practical guide and components.
d. Every student must do his own practical, however students are allowed to receive help in a constructive
manner.
e. Practical experiments must be built by the student himself and the relevant answers supplied on the
respective answer sheet for that experiment.
f. Use standard symbols and notation, as used in the theoretical notes and practical guide, on the answer
sheet.
g. Where applicable, the construction of your practical assignment will be evaluated on the following criteria:
i) neatness;
ii) correct layout of components;
iii) correct wiring techniques;
iv) correct operation of circuit;
v) student's knowledge of the circuit; and
vi) insight into the practical work.
h. All the experiments need to be certified by the student's mentor (see the form attached), as the student's
own work. Refer to paragraph 3 for the very important information regarding the appointment of your
mentor.
i. Students need to take every safety precaution (especially where the experiment involves 220-V and 380-V
alternating current). UNISA cannot be hPCE responsible for any damage to equipment or harm to any
person. In cases where the student is in doubt about any safety aspect, contact Unisa for assistance.
2. INTERACTION WITH THEORETICAL WORK
You are advised to conduct the experiments only after the relevant theory has been covered.
3. APPOINTMENT OF MENTOR
Your mentor plays a very important role in the successful completion of your assignment. The functions of
your mentor are the following:
(a) help you in a constructive manner and

(b) verify that it is your own work.
Your mentor should thus be appointed in order to fulfill the above mentioned task.
Your mentor must preferably be professionally registered with ECSA (Engineering Counsel of
South Africa) for us to accredit his authorisation of your work. If the person acting as your mentor is not
registered with ECSA, then someone who is professionally registered with ECSA, should also authorise
your assignment. The mentor must supply his particulars as requested on the authorisation form attached
to each experiment, for us to accept his authorisation.
9
UNISA, Programme Group Engineering,
SUBMIT THIS FORM WITH THE RESULTS OF YOUR PRACTICAL

EXPERIMENTS
Industrial Electronics II - PRACTICAL
Mentor Appointment
Student number: ................................................
Student name: ....................................................
Employer: ..........................................................
Particulars of mentor:
Name: ...........................................
Address: ........................................
.........................................
.........................................
.........................................
Employer: .........................................................
Telephone number:.............................................. (W)
............................................... (H)
Qualifications:.....................................................................................
Capacity at work:................................................................................
10
INEPRA2/101/0/2020
Assignment 2
Instructions
All text in the practical must be done in your own handwriting. No typed assignments are
acceptable. Simulation measurements and schematics are to be pasted into each practical
report. The simulation must be done with the aid of SIMetrix Elements which is available at
www.simetrix.co.uk. If no proof of actual simulation is submitted a failure mark will be awarded.
Scan the complete document to a pdf format.
Each practical report must be done following this format:
1. Aim
2. Mathematical
Modelling Circuit
Waveforms
Derivation
Results
3. Simulation Modelling
Schematic
Waveforms with Annotated Measurements
4. Tabulated results
Results must be tabulated and with % errors between mathematical and simulation
modelling calculated and indicated.
5. Discussion
Discuss the method followed, results obtained and reason for error percentage.
6. Conclusion
The conclusion must be erudite and must refer to the aim.
Practical 1
Aim: Determine the true power dissipated in the load of a single-phase half-wave rectifier
fed from a 220 V 50 Hz supply. The load resistor is equal to the last two numbers of your
student number + 10 ohm. [25]
Practical 2
Aim: Determine the true power dissipated in the load of a single-phase bridge rectifier fed
from a 220 V 50 Hz supply. The load resistor is equal to the last two numbers of your
student number + 10 ohm. [25]
Practical 3
Aim: Determine average voltage over the load of a single-phase half-wave rectifier fed
from a 22 V 50 Hz supply. The load consists of a 100 mH inductor with a 10 Ω internal
resistance. [25]
Practical 4
Aim: Determine the relationship of the average output voltage against the delay angle of
a single-phase half-wave controlled rectifier fed from a 22 V 50 Hz supply. The load consists of
a 100 mH inductor with a 10 Ω internal resistance with a commutating diode in parallel to the
load. Use a thyristor as the rectifying element. Install scr.txt into Simetrix
following the instructions below. [25]
/100/
11
Installing thyristors into SIMetrix
SIMetrix does not have the models for thyristors installed all ready. The user must import
them. To install thyristors into SIMetrix, download the file scr.txt or contact Dr. van Rensburg
via email and request the file. (You can also use the information following these instructions
to create your own scr.txt file using Notepad.) Save the file on the desktop of the computer.
Minimize all other windows except the SIMetrix Command Shell window. Position the
Command Shell window in such a position that the file scr.txt is visible (see screen shot
below). Drag and drop it into the Command Shell window. Click <OK> in the pop up window
to install the models.
Selection of a thyristor model is done as follows: Select Place<From Model Library>. A

window with models opens. In the right hand pane select the XC106D. Click on <Place>.
A window similar to the one below (Associate Symbol with Model) opens up to allow
association with a symbol. Choose a New Category and type “Thyristors”. Click <OK>.
Use the drop down list to define a symbol for XC106D. Although XC106A is shown below,
XC106D must be used in 220 V circuits since it has a higher PIV rating.
12
INEPRA2/101/0/2020
Click <OK>.
8.7 Other assessment methods
None
8.8 The examination
No examination but for above portfolio / practical report.
13
9 FREQUENTLY ASKED QUESTIONS
The my Studies @ Unisa brochure contains an A-Z guide of the most relevant study
information.
10 SOURCES CONSULTED
None
11 IN CLOSING
Please ensure that you have all the tutorial letters and prescribed book available before starting
with your studies.
12 ADDENDUM
Scr.txt
*Default SCR - pin order: A G K
.SUBCKT XSCR 1 2 3
Q1 2 4 1 QPSCR AREA=.67 OFF
Q2 4 2 3 QNSCR AREA=.67
Q3 5 4 1 QPSCR AREA=.33 OFF
Q4 4 5 3 QNSCR AREA=.33
RBN2540
.MODEL QNSCR NPN(TF=400NS TR=1.6US CJC=75PF CJE=175PF
XTB=2.5 + IS=1E-14 ISE=3E-9 NE=2 BF=100 BR=25 ISC=3E-9 NC=2)
.MODEL QPSCR PNP(TF=90NS TR=180NS CJC=75PF CJE=80PF XTB=2.5
+ IS=1E-14 ISE=3E-9 NE=2 BF=50 BR=25 ISC=3E-9 NC=2 RE=.03)
.ENDS XSCR
* IR 1200V If=110A tq=16us: A G K

.SUBCKT XS19CF 1 3
2 S11562SMOD
RG3450
VX42DC0
VY57DC0 DT
7 2 DMOD
RT621
CT 6 2 10UF
BF1 2 6 I=50*I(VX)+11*I(VY)
.MODEL SMOD SW(VT=1 RON=0.0105 ROFF=100E5)
.MODEL DMOD D(IS=2.2E-15 BV=1200 TT=0 CJO=0)
.ENDS XS18CF
*Motorola 200V If=1.6A Igt=.2mA Vgt=.8V: A G K

.SUBCKT X2N2326 1 2 3
QP 6 4 1 POUT OFF
QN 4 6 5 NOUT OFF
RF 64 40MEG
RR 14 26.6MEG
RGK65 2.25k
RG 26 51.9
14
INEPRA2/101/0/2020
RK 35 43.3M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL ZF D (IS=.64F IBV=1U BV=200 RS=6MEG)
.MODEL ZR D (IS=.64F IBV=1U BV=266)
.MODEL ZGK D (IS=.64F IBV=1U BV=5)
.MODEL POUT PNP (IS=640F BF=1 CJE=1.34N)
.MODEL NOUT NPN (IS=640F BF=100 RC=.173
+ CJE=1.34N CJC=268P TF=80.1N TR=11.4U)
.ENDS X2N2326
*300V 8A
.SUBCKT X2N4171 1 2 3
* TERMINALS: A G K
QP 6 4 1 POUT OFF
QN 4 6 5 NOUT OFF
RF 6 4 600K
RR 1 4 400K
RGK65 112
RG 26 4.61
RK 35 8.13M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL ZF D (IS=3.2F IBV=100U BV=300 RS=90K)
.MODEL ZR D (IS=3.2F IBV=100U BV=400)
.MODEL ZGK D (IS=3.2F IBV=100U BV=5)
.MODEL POUT PNP (IS=3.2P BF=1 CJE=670P)
.MODEL NOUT NPN (IS=3.2P BF=100 RC=32.5M
+ CJE=670P CJC=134P TF=179N TR=25.5U)
.ENDS X2N4171
* C106A SCR A G K MCE 7-17-95

*MCE 100V 4A pkg:TO-225AA
.SUBCKT XC106A 1 2 3
QP 6 4 1 POUT OFF QN
4 6 5 NOUT OFF RF 6 4
22.2MEG
RR 1 4 14.8MEG
RGK65 1.12K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL ZF D (IS=1.6F IBV=900N BV=100 RS=3.33MEG)
.MODEL ZR D (IS=1.6F IBV=900N BV=133)
.MODEL ZGK D (IS=1.6F IBV=900N BV=6)
.MODEL NOUT NPN (IS=1.6P BF=100 RC=65M
+ CJE=418P CJC=83.7P TF=214N TR=68U)
.ENDS XC106A
* C106B SCR A G K MCE 7-17-95

.SUBCKT XC106B 1 2 3
4 6 5 NOUT OFF
15
RF 64 44.4MEG
RR 14 29.6MEG
RGK65 1.12K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
+ CJE=418P CJC=83.7P TF=214N TR=68U)
.ENDS XC106B
* C106D SCR A G K MCE 7-17-95

.SUBCKT XC106D 1 2 3
88.9MEG
RR 1 4 59.2MEG
RGK65 1.12K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
+ CJE=418P CJC=83.7P TF=214N TR=68U)
.ENDS XC106D
* C106F SCR A G K MCE 7-17-95

.SUBCKT XC106F 1 2 3
11.1MEG RR 1 4
7.4MEG
RGK65 1.12K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL ZR D (IS=1.6F IBV=900N BV=66.6)
+ CJE=418P CJC=83.7P TF=214N TR=68U)
.ENDS XC106F
* C106M SCR A G K MCE 7-17-95

16
INEPRA2/101/0/2020
.SUBCKT XC106M 1 2 3
QP 6 4 1 POUT OFF
QN 4 6 5 NOUT OFF
RF 64 133MEG
RR 14 88.9MEG
RGK65 1.12K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL ZF D (IS=1.6F IBV=900N BV=600 RS=20MEG)
+ CJE=418P CJC=83.7P TF=214N TR=68U)
.ENDS XC106M
*GE A G K
.SUBCKT XC149M10 1 2 3
RGATE 2 5 20
VGS510
SCRSW 3 4 6 1 SWMOD
CSWITCH 3 4 450PF
VAS410
FSENSE 1 6 POLY(2) VGS VAS 0 50 11
RSENSE 6 1 1
CR 6 1 10UF
.MODEL SWMOD SW RON=0.0125 ROFF=103000 VT=1 VH=0
*.MODEL SSCR VSWITCH (RON=0.0125 ROFF=103000 VON=1 VOFF=0)
.ENDS XC149M10
* MCR100-3 SCR A G K MCE 7-17-95

*MCE MCR100-3 100V 800mA pkg:TO-226AA
.SUBCKT XMCR1003 1 2 3
QP 6 4 1 POUT OFF
QN 4 6 5 NOUT OFF
RF 64 20MEG
RR 14 13.3MEG
RGK65 6.25K
RG 26 9.17
RK 35 81.3M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL POUT PNP (IS=320F BF=1 CJE=67P)
+ CJE=67P CJC=13.4P TF=56.6N TR=8.06U)
.ENDS XMCR1003
* MCR100-4 SCR A G K MCE 7-17-95

QP 6 4 1 POUT OFF
17
QN 4 6 5 NOUT OFF
RF 64 40MEG
RR 14 26.6MEG
RGK65 6.25K
RG 26 9.17
RK 35 81.3M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
+ CJE=67P CJC=13.4P TF=56.6N TR=8.06U)
.ENDS XMCR1004
* MCR100-6 SCR A G K MCE 7-17-95

QP 6 4 1 POUT OFF
QN 4 6 5 NOUT OFF
RF 64 80MEG
RR 14 53.3MEG
RGK65 6.25K
RG 26 9.17
RK 35 81.3M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
+ CJE=67P CJC=13.4P TF=56.6N TR=8.06U)
.ENDS XMCR1006
* MCR100-8 SCR A G K MCE 7-17-95

* TERMINALS: A G K
* 600 Volt .8 Amp SCR 07-17-1995
QP 6 4 1 POUT OFF
QN 4 6 5 NOUT OFF
RF 6 4 120MEG RR 1
4 80MEG
RGK65 6.25K
RG 26 9.17
RK 35 81.3M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
+ CJE=67P CJC=13.4P TF=56.6N TR=8.06U)
.ENDS XMCR1008
18
INEPRA2/101/0/2020
* MCR106-2 SCR A G K MCE 7-17-95

*MCE MCR106-2 60V 4A pkg:TO-225AA
.SUBCKT XMCR1062 1 2
3 QP 6 4 1 POUT OFF QN
4 6 5 NOUT OFF
RF 6 4 15MEG
RR 1 4 10MEG
RGK65 6.25K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL POUT PNP (IS=1.6P BF=1 CJE=60.3P)
+ CJE=60.3P CJC=12P TF=126N TR=18U)
.ENDS XMCR1062
* MCR106-3 SCR A G K MCE 7-17-95

4 6 5 NOUT OFF
RF 6 4 25MEG RR
1 4 16.6MEG
RGK65 6.25K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.ENDS XMCR1063
* MCR106-4 SCR A G K MCE 7-17-95

4 6 5 NOUT OFF
RF 6 4 50MEG RR
1 4 33.3MEG
RGK65 6.25K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
19
.ENDS XMCR1064
* MCR106-6 SCR A G K MCE 7-17-95

.SUBCKT XMRC1066 1 2
4 6 5 NOUT OFF
RF 6 4 100MEG
RR 1 4 66.6MEG
RGK65 6.25K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.MODEL ZF D (IS=1.6F IBV=800N BV=400 RS=15MEG)
.ENDS XMRC1066
* MCR106-8 SCR A G K MCE 7-17-95

.SUBCKT XMRC1068 1 2
4 6 5 NOUT OFF
RF 6 4 150MEG
RR 1 4 100MEG
RGK65 6.25K
RG 26 46.2
RK 35 16.2M
DF 64 ZF
DR 14 ZR
DGK65 ZGK
.ENDS XMRC1068
20

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INEPRA2/101/0/2021

Tutorial letter 101/0/2021

Industrial Electronics II (Practical)

Department of Electrical and Mining

This tutorial letter contains important

2 PURPOSE OF AND OUTCOMES

• An understanding of the principles of power electronic converters.

3 LECTURER(S) AND CONTACT DETAILS

4.2 Recommended books

There are no recommended books for this module.

4.3 Electronic Reserves (e-Reserves)

There are no electronic reserves for this module.

For brief information, go to www.unisa.ac.za/brochures/studies

For detailed information, go to the Unisa website at http://www.unisa.ac.za/ and click

For research support and services of personal librarians, go to

The library has compiled a number of library guides:

• finding recommended reading in the print collection and e-reserves –

• requesting material – http://libguides.unisa.ac.za/request/request

5 STUDENT SUPPORT SERVICES

Important information appears in your my Studies @ Unisa brochure.

8.1 Assessment criteria

8.2 Assessment plan

The assignments are as follows:

Submission of both assignments is compulsory.

ASSIGNMENT NUMBER CONTRIBUTION TOWARDS FINAL SUBJECT

8.3 Assignment numbers

8.3.1 General assignment numbers

8.3.2 Unique assignment numbers

8.4 Assignments due dates

Assignment 1 (Annexure A- 16 April 2021

Assignment 2 – Results of experiments 15 September 2021

If you submit an assignment online, please submit in PDF-format.

A practical assignment must be submitted or a practical workshop must be attended. The

NO EXCEPTIONS OR CHANGES WILL BE MADE

To submit an assignment via myUnisa:

Assignment 1 must be submitted by all students, whether you want to attend a

REGISTRATION FORM FOR INDUSTRIAL ELECTRONICS II

PLEASE COMPLETE IN CLEAR BLOCK LETTERS & SEND IN AS A

Indicate preference with an X:

I want to attend the practical workshop

I want to do the practical assignment on my

The date, according to the workshop

ONCE A STUDENT WAS ALLOCATED TO A SPECIFIC DATE, NO CHANGES WILL BE

1. POLICY FOR PRACTICAL ASSIGNMENTS

a. All experiments have to be performed.

2. INTERACTION WITH THEORETICAL WORK

(a) help you in a constructive manner and

SUBMIT THIS FORM WITH THE RESULTS OF YOUR PRACTICAL

Industrial Electronics II - PRACTICAL

Selection of a thyristor model is done as follows: Select Place<From Model Library>. A

8.7 Other assessment methods

No examination but for above portfolio / practical report.

* IR 1200V If=110A tq=16us: A G K

*Motorola 200V If=1.6A Igt=.2mA Vgt=.8V: A G K

* C106A SCR A G K MCE 7-17-95

* C106B SCR A G K MCE 7-17-95

* C106D SCR A G K MCE 7-17-95

* C106F SCR A G K MCE 7-17-95