표제지
목차
Abstract 7
I. 서론 8
II. 3상 변압기의 기본 원리 10
III. 3상 주상변압기 사양 12
IV. 3상 주상변압기 제작 14
1. 철심 14
2. 권선 30
3. 절연물 32
V. 3상 주상변압기 개발 효과 34
1. 구조 및 외형 34
2. 시험 결과 35
3. 중량 및 부피 비교 35
4. 개발 효과 37
VI. 결론 38
VII. 참고문헌 39
Table 1. 3 Phase Pole mounted Transformer Specification 12
Table 2. Efficiency Level for 3 Phase Transformer 12
Table 3. DOE Efficiency Level for 3 Phase Transformer 13
Table 4. Flux Density of Exciting Force 15
Table 5-1. Compared to the winding core by Type (1) 17
Table 5-2. Compared to the winding core by Type (2) 17
Table 6. Y type Core(1) data 19
Table 7. △ type Core(Stacked core type) data 20
Table 8. Y type Core(2) data 21
Table 9. Y type Core(3) data 23
Table 10. Y type Core(1~3) data 24
Table 11. △ type Core data (Wounded core type) 25
Table 12. △ type Core(4) data 27
Table 13. △ type Core(5) data 28
Table 14. Transformer winding types and characteristics of the material 30
Table 15. Comparison by type of transformer winding material 31
Table 16. Comparison of transformer coil lamination factor 31
Table 17. Types and characteristics of the transformer oil 32
Table 18. Insulation class and the highest allowable temperature 26 33
Table 19. Insulating paper types and characteristics 34
Table 20. Test report 35
Table 21. Compare the efficiency and weight of transformers(50kVA) 36
Table 22. Compare the efficiency and weight of transformers(150kVA) 36
Fig. 1. The basic principle of shell type three phase transformer 10
Fig. 2. The shell type transformer 10
Fig. 3. The core type three phase transformer 11
Fig. 4. Variation of magnetic flux lines in transformer core 15
Fig. 5. Flux leakages at T-joint and Graph of power loss from measurement 16
Fig. 6. Step-lap joint 16
Fig. 7. Y type Core(1) 18
Fig. 8. △ type Core (Stacked core type) 19
Fig. 9. Y type Core(2) 20
Fig. 10. Y type Core(3) 22
Fig. 11. phase separated Y type Core 23
Fig. 12. △ type Core (Wounded core type) 24
Fig. 13. △ type Core(4) 26
Fig. 14. △ type Core(5) 27
Fig. 15. 1st~5th Core images 29
Fig. 16. 1st~5th Compared to the no load-losses curve 29
Fig. 17. The application of hybrid insulation 33
Fig. 18. 3 Phase pole mounted type transformer 34