A Numerical and Experimental Analysis on the Thermal Characteristics of a Direct-Oil-Cooled Traction Motor
- 주제어 (키워드) Electric Vehicle , Traction Motor , Direct-Oil-Cooled , Motor Loss , Inverse Distance Weighting , CFD , Volume of Fluid , Motor Dynamometer Test
- 발행기관 서강대학교 일반대학원
- 지도교수 손기헌
- 발행년도 2025
- 학위수여년월 2025. 2
- 학위명 박사
- 학과 및 전공 일반대학원 기계공학과
- 실제 URI http://www.dcollection.net/handler/sogang/000000079852
- UCI I804:11029-000000079852
- 본문언어 영어
- 저작권 서강대학교 논문은 저작권 보호를 받습니다.
목차
1 Introduction 1
1.1 Background 1
1.1.1 Electric vehicles 1
1.1.2 Traction motors 2
1.2 Thermal Aspect of Traction Motor 4
1.2.1 Motor characteristics 4
1.2.2 Motor loss and thermal aspect 5
1.2.3 Motor cooling systems 10
1.2.4 Direct-Oil-Cooled system 11
1.3 Research Objective 13
1.3.1 Problem statements 13
1.3.2 Research goals 14
2 Numerical Approaches 26
2.1 Direct-Oil-Cooled Traction Motor 26
2.2 Numerical Methodologies 29
2.2.1 Electromagnetic loss analysis methods 30
2.2.2 Thermal analysis methods 31
2.2.3 Numerical analysis process 32
2.3 Electromagnetic Loss Analysis 33
2.3.1 Governing equations of motor loss 34
2.3.2 Electromagnetic simulations 40
2.3.3 Motor loss simulation results 41
2.4 CFD Based Motor Heat Analysis 44
2.4.1 Governing equations of fluid flow 44
2.4.2 Fluid modelling 50
2.4.3 Volume meshing 58
2.4.4 Electromagnetic-thermal coupling 60
2.4.5 Thermal Properties Modeling 61
2.4.6 Boundary conditions 67
2.4.7 Mesh sensitivity test 68
2.4.8 Classification of motor heat analysis cases 70
2.4.9 Simulation environments 71
2.4.10 Simulation results 72
3 Experimental Approaches 152
3.1 Experimental Setup 152
3.2 Motor Characteristics Test 153
3.2.1 Test results under CL 154
3.2.2 Test results under IL 156
3.3 Validations 158
3.3.1 Back electromotive force comparison 159
3.3.2 Motor power and efficiency comparison 160
3.3.3 Thermal behavior comparison 161
4 Discussions 194
4.1 IDW Motor Loss Interpolation 194
4.2 Pseudo-transient VOF 195
5 Concluding Remarks 196
Bibliography 198
