CENTRALIZED HIGH FREQUENCY SUPPLY 
SYSTEM FOR LIGHTING SYSTEMS 
 
 
 
 
 
H. D. Anil Ranjith 
 
Project Supervisor: Dr. H. Y .R .Perera 
 
 
A Dissertation Submitted to the Electrical Engineering Department of the 
University of  Moratuwa  for the fulfillment of Master of Engineering In Electrical Engineering 
 
 
 
Department of the Electrical Engineering 
University of Moratuwa 
Sri Lanka 
December 2001 
 
 
 
74483 
  
CONTENTS 
Acknowledgement 
Introduction 
Methodology 
2.1 Objectives 
2.2 Procedure 
Implementation 
3.1 Testing of existing circuit 
3.2 Designing of power circuit 
3.3 Modification of control circuit 
3.4 Application of power factor correction IC 
Testing 
4.1 Driving of Several lamps c lose to the circuit 15 
4.2 Driving a lamp at a distance to the circuit 15 
4.3 Driving of several lamps at a distance to the circuit 15 
4.4 Driving of several lamps at a distance for a long time 16 
4.5 Checking for interference for radio transmission 16 
4.6 Comparison of Power consumption of following systems 16 
4.7 Comparison of the light output of a fluorescent lamp with a conventional 
magnetic ballast ' 19 
Problems Encountered 
Observations 
Cost Comparison 
Conclusions 
Discussion 
9 .I Importance of the project 
9.2 Possible future improvements 
9.3 Failure of power factor controlling 
References 
Appendix 
A Details ofUC3854 power Factor correction IC 
8 Data on IR215 7 Ballast Control IC 
C Details of Local Electronic Ballast Designed by NERD 
~ 
 
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ACKNOWLEDEMENT 
I followed a master of Engineering course in Electrical 
Engineering at University of Moratuwa. Completing of a 
research project and presenting a report was a part of the 
course. This report covers that part of the above course. 
My research was named "Centralized High Frequency 
Supply System for Lighting systems". The main objective 
of the research was to ascertain the feasibility of having a 
centralized high frequency supply system in place of 
Compact fluorescent Lamps (CFL) and thereby to evaluate 
the cost effectiveness of the system. 
The idea of designing of high frequency supply systc¢ was 
brought forward for the first time by Dr. H.Y.R.Perera, the 
project supervisor of this project. with the view of reducing 
the cost of the lighting. 
First I should place my grate gratitude to Or. H. Y.R. Perera 
for his excellence guiding and support extended to bring 
this project a success. As this was a new to me also he 
guided and encouraged me supplying various information 
on this from the beginning. 
Then I must place special thanks on Rrofcssor J.R.Lucas, 
The Head of the Department of Electrical Engineering, 
university of Moratuwa for his valuable support extended 
by suggesting numerous improvements that were later 
integrated into the system. 
Further I must thank to all the lecturers engaged in M.Eng 
course sessions who made our vision broad and try to 
improve our knowledge in various directions in the field of 
Electrical Engineering. 
Finally I should thank all my colleagues in M.Eng course 
for their support extended to complete this at the end. 
My special thanks goes to my wife, Champa and daughter, 
Mithara for tolerating of my engagement on this without 
looking after their needs. 
-
H.D.Anil Ranjith 
Cmtrllized Hill> Frcquenq Supplv S>·stem for loghung s,stem• 
CONTENTS 
Cha~?_ter Page 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
Acknowledgement 
Introduction 
Methodology 
2.1 Objectives 
2.2 Procedure 
Implementation 
3.1 Testing of existing circuit 
3.2 Designing of power circuit 
3.3 Modification of control circuit 
3.4 Application of power factor correction IC 
Testing 
./ 
1-4 
5-9 
5 
5 
10-14 
10 
12 
13 
14 
15-20 
4.1 Driving of Several lamps close to the circuit 15 
4.2 Driving a lamp at a distance to the circuit 15 
4.3 Driving of several lamps at a distance to the circuit 15 
4.4 Driving of several lamps at a distance for a long time 16 
4.5 Checking for interference for radio transmission 16 
4.6 Comparison of Power consumption of following systems 16 
4.7 Comparison of the light output of a fluorescent lamp with a conventional 
magnetic ballast ' 19 
Problems Encountered 
Observations 
Cost Comparison 
Conclusions 
Discussion 
9 .I Importance of the project 
9.2 Possible future improvements 
9.3 Failure of power factor controll ing 
References 
Appendix 
A Details ofUC3854 pO\\er Factor correction IC 
8 Data on IR2157 Ballast Control IC 
C Details of Local Electronic Ballast Designed by NERD 
~ 
21-22 
23-24 
25 
26-27 
28-33 
28 
28 
32 
34 
35