Title Page
Contents
Ⅰ. Introduction 11
1. Brief History of SRM 11
2. Configuration of SR Motor and Drive 14
3. Torque Production in SRM 17
4. Research Background and Scope 20
5. Contributions and Outline of Dissertation 21
Ⅱ. Design Parameters of SRM 23
1. Motor Sizing 24
2. Pole and Phase Numbers 30
3. Internal Design Parameters 32
3.1. Rotor Outer Diameter 32
3.2. Stator and Rotor Pole Arcs 33
3.3. Stator and Rotor Yokes 38
3.4. Shaft Diameter 40
3.5. Air-Gap Length 40
4. Winding Parameters 42
Ⅲ. Conventional Design Methodology of SRM 45
1. Performance Indicators 45
2. Conventional Design Methodology 47
3. Problems with Conventional Design Methodology 50
Ⅳ. Proposed Design Methodology of SRM 52
1. Importance of Saturation in SRM 52
2. Proposed Design Methodology 54
2.1. Initialization Stage 58
2.2. Parameter Modification Stage 62
2.3. Total Optimization Stage 69
Ⅴ. Design with Low Torque Ripple Requirement 70
1. Initialization Stage 70
2. Parameter Modification Stage - Level 1 75
3. Parameter Modification Stage - Level 2 78
4. Experiment Results 88
Ⅵ. Design with Low Radial Force Requirement 94
1. Initialization Stage 94
2. Parameter Modification Stage - Level 1 101
3. Parameter Modification Stage - Level 2 105
4. Experiment Results 116
Ⅶ. Discussions 120
Ⅷ. Conclusions 122
References 124
개요 134
Academic Achievements 136
Table Ⅱ-1. Various value of k based on the output and cooling method 27
Table Ⅱ-2. Commonly selected SRM pole and phase numbers 31
Table Ⅱ-3. Ratio of Dr/Ds for the commonly selected SRM types[이미지참조] 33
Table Ⅲ-1. Review of the sizing method of SRM 51
Table Ⅳ-1. Characteristics of different materials 53
Table Ⅳ-2. Initial parameter decision by ratios 59
Table Ⅳ-3. Set values of the 6 ratios 60
Table Ⅴ-1. Calculated parameters in the initialization stage 74
Table Ⅴ-2. Torque ripple comparison 88
Table Ⅵ-1. Sizing found in literatures 95
Table Ⅵ-2. Calculated parameters in the initialization stage 98
Table Ⅵ-3. Numerical comparison of force and torque 115
Table Ⅵ-4. Accelerometer output comparison 117
Table Ⅵ-5. Performance comparison 119
Figure Ⅰ-1. Number of IEEE publications on SRM design 13
Figure Ⅰ-2. Structure of SRM 14
Figure Ⅰ-3. Asymmetric half-bridge connection 15
Figure Ⅰ-4. SRM classification 16
Figure Ⅰ-5. Magnetization curve 17
Figure Ⅰ-6. Change of energy with rotor position 18
Figure Ⅱ-1. Geometrical design parameters of SRM 24
Figure Ⅱ-2. Effect of pole arcs on inductance profile 35
Figure Ⅱ-3. "Feasible triangle" indicating viable values for pole arcs 37
Figure Ⅱ-4. Magnetization curve of different materials 44
Figure Ⅲ-Ⅰ. Conventional design flow of SRM 49
Figure Ⅳ-1. Effect of saturation to mechanical work 52
Figure Ⅳ-2. Flux linkage curves for different materials 53
Figure Ⅳ-3. Popular optimization algorithms for electrical machine design 56
Figure Ⅳ-4. Outline of the proposed methodology 57
Figure Ⅳ-5. Diagram of the initialization stage 61
Figure Ⅳ-6. Dynamic characteristics of SRM 63
Figure Ⅳ-7. Static characteristics of SRM 64
Figure Ⅳ-8. Static air-gap flux density 65
Figure Ⅳ-9. Concept of radial force in SRM 65
Figure Ⅳ-10. Radial force of SRM during excitation 66
Figure Ⅳ-11. Static radial force of SRM for one-phase excitation 67
Figure Ⅳ-12. Dynamic flux distribution during excitation 68
Figure Ⅴ-1. Diagram of SBW actuator 71
Figure Ⅴ-2. Effect of khr and kDr on performance[이미지참조] 73
Figure Ⅴ-3. Static characteristic of the initial 12/8 SRM for SBW 75
Figure Ⅴ-4. Dynamic characteristic of the initial 12/8 SRM for SBW 76
Figure Ⅴ-5. Air-gap flux density of the initial 12/8 SRM for SBW 77
Figure Ⅴ-6. Design of rotor pole with non-uniform air-gap 79
Figure Ⅴ-7. Effect of βₙₒₙ on inductance and torque 80
Figure Ⅴ-8. Effect of βₙₒₙ on air-gap flux density 81
Figure Ⅴ-9. Design of rotor pole with non-uniform air-gap and holes 82
Figure Ⅴ-10. Comparison of the motor models 83
Figure Ⅴ-11. Flux density of conventional type 85
Figure Ⅴ-12. Flux density of proposed structure 86
Figure Ⅴ-13. Continuous torque 87
Figure Ⅴ-14. Manufactured motor 89
Figure Ⅴ-15. Experimental setup 90
Figure Ⅴ-16. Experimental results 91
Figure Ⅴ-17. Performance curves 92
Figure Ⅴ-18. Comparison of phase currents and estimated torque 93
Figure Ⅵ-1. Effect of khr and kDr on performance[이미지참조] 96
Figure Ⅵ-2. Effect of khr and kDr on phase current density[이미지참조] 98
Figure Ⅵ-3. Effect of kDr on performance (Dₛₕ value is known)[이미지참조] 99
Figure Ⅵ-4. Model comparison 100
Figure Ⅵ-5. Dynamic characteristics of the initial model 102
Figure Ⅵ-6. Dynamic flux density 103
Figure Ⅵ-7. Flux density distribution of the initial model 104
Figure Ⅵ-8. Proposed rotor with punch-through hole 105
Figure Ⅵ-9. Hole design parameters 106
Figure Ⅵ-10. Radial force of punch-through hole model 108
Figure Ⅵ-11. Torque of punch-through hole model 109
Figure Ⅵ-12. Flux density and vector at 28° 110
Figure Ⅵ-13. Flux density and vector at 45° 111
Figure Ⅵ-14. Proposed partial inner holes 112
Figure Ⅵ-15. Simulation result of changing Lin and Lₕ[이미지참조] 113
Figure Ⅵ-16. Flux density and vector of inner hole model 114
Figure Ⅵ-17. Final force and torque comparison 115
Figure Ⅵ-18. Manufactured motor 116
Figure Ⅵ-19. Experimental setup 116
Figure Ⅵ-20. No load experiment result at 18,000 RPM 118
Figure Ⅵ-21. Rated load experiment result at 18,000 RPM 118