DIGITAL CONTROL OF A DC/DC CONVERTER WITH A DSPIC EVALUATION BOARD
By
Anthony Steven Setiawan 11112020
BACHELOR’S DEGREE in
MECHANICAL ENGINEERING – MECHATRONICS CONCENTRATION FACULTY OF ENGINEERING AND INFORMATION TECHNOLOGY
SWISS GERMAN UNIVERSITY EduTown BSD City
Tangerang 15339 Indonesia
August 2016
Revision after the Thesis Defense on 20 July 2016
In Cooperation With
Anthony Steven Setiawan STATEMENT BY THE AUTHOR
I hereby declare that this submission is my own work and to the best of my knowledge, it contains no material previously published or written by another person, nor material which to a substantial extent has been accepted for the award of any other degree or diploma at any educational institution, except where due acknowledgement is made in the thesis.
Anthony Steven Setiawan
____________________________________________
Student Date
Approved by:
Prof. Dr.- Ing Peter Thiemann
____________________________________________
Thesis Advisor Date
Erikson Ferry Sinaga, S.T. M.Kom.
____________________________________________
Thesis Co-Advisor
Date
Dr. Ir. Gembong Baskoro, M.Sc.
____________________________________________
Dean Date
DIGITAL CONTROL OF A DC/DC CONVERTER Page 3 of 102 WITH DSPIC-EVALUATION BOARD
Anthony Steven Setiawan ABSTRACT
DIGITAL CONTROL OF A DC/DC CONVERTER WITH A DSPIC EVALUATION BOARD
By
Anthony Steven Setiawan Prof. Dr.-Ing Peter Thiemann, Advisor Erikson Ferry Sinaga S.T. M.Kom. , Co-Advisor
SWISS GERMAN UNIVERSITY
DC/DC converters are widely used both in the commercial and industrial world.
DC/DC converters are used to change the voltage level of DC voltage to be used in various applications. This project aims to create a DC/DC converter that can be controlled by a dsPIC evaluation board. The dsPIC evaluation board will provide the PWM needed by the switching DC/DC converter and the result measurements of the system are displayed on the onboard LCD. Some adjustments both in hardware and software are made to interface both devices. The DC/DC converter used in this project is the QUINT Buffer 24VDC/24VDC/40A from Phoenix Contact. The buffer module consists of a buck and boost converter connected in series, and both of them are controlled by separate drivers. The dsPIC will replace the drivers of both buck and boost converters. With proper adjustments, the system of this project can control another DC/DC converter.
Keywords: Buck, Boost, dsPIC, DC/DC Converter, Power Electronics.
Anthony Steven Setiawan
© Copyright 2016 by Anthony Steven Setiawan
All rights reserved
DIGITAL CONTROL OF A DC/DC CONVERTER Page 5 of 102 WITH DSPIC-EVALUATION BOARD
Anthony Steven Setiawan DEDICATION
I dedicate this thesis works for both Indonesia and Germany in which I learned so many things.
Anthony Steven Setiawan ACKNOWLEDGEMENTS
I would like to express my deep gratitude for Prof. Dr.-Ing. Peter Thiemann, for your generous support and guidance. Without your guidance, I would not be able to finish this thesis. Also for Mr. Erikson Ferry Sinaga S.T. M.Kom, who spared time to answer my questions and provides me with insight despite his busy schedule. Mr. Marvin Cruse B.Eng., Mr. Karl-Heinz Weber, Mr. Tobias Müller M.Sc., and Mr. Rodrigo Guzman M.Sc. from the lab where I worked my thesis, provided me with continuous supports and advices in Prof. Thiemann’s absence. Endie Wibowo and Vincens Louis, with whom I shared an apartment during our stay in Germany, Mr. Leonard Priyatna Rusli, M.Sc., Ph.D. Who had confidence in me to be able to finish my thesis abroad, and gives me the push I needed when I doubt myself, thank you.
Also for Nicksen who helped me to print this thesis.
And finally, my beloved family for your emotional support throughout my thesis and for everybody involved in my thesis work, Thank you.
DIGITAL CONTROL OF A DC/DC CONVERTER Page 7 of 102 WITH DSPIC-EVALUATION BOARD
Anthony Steven Setiawan TABLE OF CONTENTS
Page
STATEMENT BY THE AUTHOR ... 2
ABSTRACT ... 3
DEDICATION ... 5
ACKNOWLEDGEMENTS ... 6
TABLE OF CONTENTS ... 7
LIST OF FIGURES ... 9
LIST OF TABLES ... 11
CHAPTER 1 - INTRODUCTION ... 12
CHAPTER 2 - LITERATURE REVIEW ... 14
2.1 Buck Converter ... 14
2.1.1 Continuous Mode Buck Converter ... 16
2.1.2 Discontinuous Mode Buck Converter ... 19
2.2 Boost Converter ... 22
2.2.1 Continuous Mode Boost Converter ... 24
2.2.2 Discontinuous Mode Boost Converter... 28
2.3 Pulse Width Modulation ... 30
2.4 Operational Amplifier ... 31
2.5 Voltage Divider ... 32
2.6 dsPIC Evaluation Board ... 33
2.7 Buffer Module ... 34
2.8 Metal Oxide Semiconductor Field Effect Transistor ... 40
2.9 PID Controller ... 41
CHAPTER 3 - RESEARCH METHODS ... 42
3.1 Materials and Equipment ... 42
3.2 Analytical Method ... 42
3.3 Software Modification ... 43
3.3.1 Switching Frequency ... 43
3.3.2 Voltage Reference ... 47
3.3.3 LCD ... 49
3.3.4 PID Tuning... 50
3.4 Hardware Modification ... 55
3.4.1 Components Removed ... 55
3.4.2 Voltage Feedback Circuit ... 60
3.4.3 Transistor Level Shifter Circuit ... 70
3.4.4 Separate Output Circuit ... 73
CHAPTER 4 - RESULTS AND DISCUSSIONS ... 75
4.1 Initial Evaluation ... 76
Anthony Steven Setiawan
4.1.1 Buck Converter Initial Evaluation ... 76
4.1.2 Boost Converter Initial Evaluation ... 79
4.1 System Test ... 81
4.2 Load Test ... 85
CHAPTER 5 - CONCLUSIONS AND RECCOMENDATIONS ... 87
5.1 Conclusions ... 87
5.2 Recommendations ... 88
CHAPTER 6 - ABBREVIATION ... 90
CHAPTER 7 - REFERENCES ... 91
CHAPTER 8 - APPENDIX... 92
CURRICULUM VITAE ... 102