4 Chapter Four Modelling of Lspmsm Using Jmag ( Fem
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© ABDULAZIZ SALEH MILHEM 2017 iii This Thesis is dedicated to The soul of my Father My Dear Mother My Wife My Children Shahd, Omar and Noor My Holy Homeland Palestine iv ACKNOWLEDGMENTS All praise and glory to Allah the most merciful, the most beneficent, who gave me the health, strength, and courage to complete my Master’s degree. I would like to express my deep appreciation to my advisor Prof. Zakariya Al-Hamouz for giving me the opportunity to become one of his students. I thank him for his efficient and constant support, help, motivation, and immense knowledge. His precious advices and thorough guidance played a critical role in completing this thesis. I also would like to extend my appreciation to my dissertation committee members Prof. Mohammed Abido and Prof. Ibrahim El-Amin for their insightful comments, support, and profitable questions which incented me to enhance my work. I would like to thank our research group members supervised by Prof. Zakariya Al- Hamouz, they include Mr. Luqman Marraba for his massive support and help, Mr. Khalid Baradiah and Mr. Ibrahim Hussein. I am very grateful to Mr. Osama Hussain the General Manager and Mr. Samir Al-Hourani the Procurement Manager from Al-Osais Contracting Co. for their continuous support and understanding during the study period. I am thankful to the King Fahd University of Petroleum and Minerals (KFUPM) for providing me with the research facilities, precious resources and an environment conducive to intellectual growth for my master research v TABLE OF CONTENTS ACKNOWLEDGMENTS ........................................................................................................ V TABLE OF CONTENTS ........................................................................................................ VI LIST OF TABLES................................................................................................................... IX LIST OF FIGURES .................................................................................................................. X LIST OF ABBREVIATIONS ............................................................................................... XII NOMENCLATURE ............................................................................................................. XIII ABSTRACT ......................................................................................................................... XVI XVIII ....................................................................................................................... ﻣﻠﺨﺺ ﺍﻟﺮﺳﺎﻟﺔ CHAPTER ONE INTRODUCTION ....................................................................................... 1 1.1 Background ............................................................................................................................... 1 1.2 Thesis Motivations .................................................................................................................... 2 1.3 Thesis Objectives ....................................................................................................................... 4 1.4 Thesis Organization ................................................................................................................... 5 CHAPTER TWO LITERATURE REVIEW .......................................................................... 6 2.1 Configuration of LSPMSM .......................................................................................................... 6 2.2 B-H Curve of Permanent Magnet in LSPMSM .............................................................................. 6 2.3 Permanent Magnet Material ...................................................................................................... 8 2.4 LSPMSM Modelling Methods ..................................................................................................... 9 2.4.1 Two-axes Reference Frame Model ............................................................................................... 9 2.4.2 Equivalent circuit mathematical model ..................................................................................... 10 2.4.3 Finite Element Method (FEM) .................................................................................................... 10 2.5 Faults in LSPMSM .................................................................................................................... 10 vi 2.5.1 Stator Faults ............................................................................................................................... 11 2.5.2 Rotor Faults ................................................................................................................................ 11 2.6 Summary of Literature Review ................................................................................................. 16 CHAPTER THREE MATHEMATICAL MODELLING AND PARAMETER DETERMINATION OF LSPMSM ....................................................................................... 18 3.1 Introduction ............................................................................................................................ 18 3.2 Mathematical Model Description ............................................................................................. 18 3.2.1 Stator and Rotor Voltage Equations ........................................................................................... 1 9 3.3 Transformation to qd0 Reference Frame .................................................................................. 20 3.3.1 Stator and Rotor Voltage Equations in qd0 Reference Frame ................................................... 22 3.3.2 Flux Linkage Equations in qd0 Reference Frame: ....................................................................... 23 3.3.3 Equation of Motion and Electromagnetic Torque ...................................................................... 25 3.3.4 Healthy Model Summary ............................................................................................................ 26 3.4 Parameter Determination of LSPMSM ...................................................................................... 27 3.4.1 DC Test ....................................................................................................................................... 27 3.4.2 Open Circuit Test ........................................................................................................................ 28 3.4.3 Synchronous Speed Loading Test ............................................................................................... 2 8 3.4.4 Blocked Rotor Test ..................................................................................................................... 31 3.4.5 Single-phase AC Test .................................................................................................................. 32 3.5 Behavior of LSPMSM ............................................................................................................... 33 CHAPTER FOUR MODELLING OF LSPMSM USING JMAG ( FEM BASED SOFTWARE )........................................................................................................................ 39 4.1 Introduction ............................................................................................................................ 39 4.2 Modeling Demagnetization Fault ............................................................................................. 41 4.2.1 Healthy Model ............................................................................................................................ 42 4.2.2 Demagnetization Mechanism in LSPMSM ................................................................................. 47 4.2.3 Indexing of Demagnetization ..................................................................................................... 50 4.2.4 Demagnetization Through Three Phase Currents ...................................................................... 54 4.2.5 Sudden Rotation Reversal Model ............................................................................................... 5 5 4.2.6 Sudden increase in supply voltage Model .................................................................................. 58 CHAPTER FIVE PROPOSED DIAGNOSTICS TECHNIQUE FOR DEMAGNETIZATION FAULTS IN LSPMSM ........................................................................................................... 61 5.1 Introduction ............................................................................................................................ 61 vii 5.2 Artificial Neural Network (ANN) ............................................................................................... 61 5.3 Fault Detection ........................................................................................................................ 63 5.3.1 Features Extraction .................................................................................................................... 65 5.3.2 Features Selection ...................................................................................................................... 66 5.4 Possible Inputs ........................................................................................................................ 67 5.5 Feature Selection .................................................................................................................... 68 5.5.1 Transient