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vii TABLE OF CONTENTS CHAPTER TITLE PAGE DECLARATION ii DEDICATION iii ACKNOWLEDGEMENTS iv ABSTRACT v ABSTRAK vi TABLE OF CONTENTS vii LIST OF TABLES ix LIST OF FIGURES x LIST OF SYMBOLS xii LIST OF ABBREVIATIONS xiii 1 INTRODUCTION 1.1 Project Background 1 1.2 Objectives 3 1.3 Scope of Works 3 1.4 Methodology 4 1.5 Dissertation Overview 4 2 LITERATURE REVIEW 2.1 Literature Review of dissertation 6 2.2 Matrix Converter 10 2.2.1 Introduction 10 2.2.2 Matrix converter operation principle 12 viii 2.3 3 4 Electro Mechanical Actuator (EMA) 14 2.3.1 Introduction 14 2.3.2 EMA operation concept 15 RESEARCH METHODOLOGY 3.1 Introduction 18 3.2 Classification and advantages of PMSM 18 3.3 Structure design for the PMSM 20 3.4 Vector control theory 23 3.5 Mathematical model for PMSM 27 3.5.1 Dynamic Equation 27 3.5.2 Steady state equation 31 3.5.3 Power and Torque in terms of load angle 34 3.5.4 Maximum Torque Condition 36 3.5.5 Torque control loop 37 DESIGN, RESULTS AND ANALYSIS 4.1 Introduction 39 4.2 Direct Current id design 40 4.3 Quadrature Current iq design 43 4.4 Speed ωm loop design 45 4.5 Analysis on current and speed loop 46 4.6 Adjustment of the gain value for the id, iq 48 and speed loop 4.7 5 Fuzzy Logic Controller 51 CONCLUSION AND SUGGESTION 5.1 Conclusion and recommendation 56 5.2 Suggestion 57 REFERENCES 58 ix LIST OF TABLES TABLE NO. TITLE PAGE 4.1 Choice of sampling times 39 4.2 Comparison id result between theoretical and simulation 42 result 4.3 Comparison iq result between theoretical and simulation 44 result 4.4 Knowledge base for output single 51 4.5 Linguistic term 52 4.6 Comparison between Trimf & Gaussmf type in fuzzy logic 55 4.7 Comparison between PI controller & fuzzy logic 55 x LIST OF FIGURES FIGURE NO. 2.1 TITLE PAGE Conventional current regulate torque control strategy in the rotor reference frame 09 2.2 Basic matrix converter circuit 11 2.3 Simplified basic matrix converter circuit 13 3.2 Classification of AC motor 19 3.3 Structure of surface mounts PMSM 21 3.3(i) Configuration of rotor design in PMSM 22 3.4 Sum of the vector for three-phase to two phase 24 3.4(i) Three phase and stationary frame ( ) 25 3.4(ii) Stationary frame ( ) to field oriented frame (d-q) 26 3.5 Synchronous motor schematic and equivalent circuit 27 per phase 3.5(i) Two poles and two conductor’s synchronous motor 28 schematic 3.5(ii) Equivalent circuit per phase for quadrature axis 29 3.5(iii) Equivalent circuit per phase for quadrature axis 30 3.6 Per phase phasor diagram 32 3.7 Torque versus Load angle curve for non-salient machine 35 xi 3.8 Loci current id vsiq for non salient and salient machines 36 respectively 3.9 Maximum torque per current id and iq 37 3.10 Diagram of general arrangement of Torque control 38 4.1 Model for open loop transfer function of id 40 4.2 Model for close loop transfer function of id 41 4.3 Response of the direct current id loop 43 4.4 Model for close loop transfer function of iq 44 4.5 Response of the quadrature current iq loop 44 4.6 Model for close loop transfer function of speed, ωm 45 4.7 Response of the speed ωm loop. 46 4.8 Model for speed loop with PMSM (PI Controller) 47 4.9 Response of the current id, iq and ωm 48 4.10 Response of the current id, iq and ωm with the new k values. 50 4.11 Model for speed loop with PMSM (Fuzzy Logic) 52 4.12(i) Response of the current id 53 4.12(ii) Response of the current iq 53 4.12(iii) Response of the speed ωm 54 4.13(i) Response of the current id 54 4.13(ii) Response of the current iq 54 xii LIST OF SYMBOLS Lq - Quadrature inductance Ld - Direct inductance θ - Angle of the pendulum with respect to vertical axis TL - External load torque J - Motor shaft inertia D - Damping coefficient of viscous friction ωn - Natural frequency - Damping ratio Ki - Controller gain ai - Controller zero xiii LIST OF ABBREVIATIONS PMSM - Permanent Magnet Synchronous Motor EMA - Electro Mechanical Actuator DC - Direct Current FLC - Fuzzy Logic Controller PI - Proportional Integral AC - Alternating Current RFO - Rotor Flux Oriented PWM - Pulse Width Modulation SPVM - Space Vector Modulation EMF - Electromagnetic Force EHA - Electro-Hydrostatic Actuator VSI - Voltage Source Inverter IGBT - Isolate Gate Bi-polar Transistor SVM - Space Vector Modulation MEA - More Electric Aircraft CSE - Ground Support Equipment IM - Induction Motor PM - Permanent Magnet