표제지
목차
Abstract 10
I. 서론 13
II. 직류전동기의 이론 및 수학적 전개 15
1. 직류전동기의 이론적인 전달함수와 Block선도의 고찰 15
2. Thyristor Leonard 속도제어계의 설계 20
3. Thyristor Melnard 속도제어계의 설계 예 36
4. Motor 역기전력 36
5. 정전류제어계 38
6. 직류전동기의 속도제어, 전류제어, 전압제어의 Block도 및 Bode 선도의 고찰 39
7. Converter부의 CL (Current Limiter)을 설정하기 위한 설계 44
III. 압연기용 Main Motor의 장한시 Limiter 고찰 및 고장 사례연구 46
1. Main Motor 과부하 Trip 발생시 적용방안에 대한 이론적 정립 46
2. 장한시 Limiter의 구조 및 동작 특성 47
3. 열연공장 Main Motor Drive OL의 기본적 사상 52
4. 연구결과 63
5. 연구결과 활용 66
IV. 결론 67
V. 참고 문헌 68
감사의 글 69
Table 1. No1 Hot Strip Mill Main Motor Time Delay Set Up one's… 57
Table 2. Hot Strip Mill deduction Parameter and application 63
Table 3. No2 Hot Strip Mill adjustment Parameter 64
Table 4. Set Up order Data Trend 65
Table 5. No1 Set Up order Trip Time conjugation 65
Table 6. No2 Set Up order Trip Time conjugation 65
Fig. 1. DC Motors Equivalent Circuit 15
Fig. 2. Fig. 2. DC Motors Block Diagram 18
Fig. 3. DC Motors field Control Block Diagram 19
Fig. 4. DC Reactor Connect Equivalent Circuit 19
Fig. 5. Thyristor Leonard Block Diagram 20
Fig. 6. Form I, II Control Distinctive 21
Fig. 7. Voltage Fluctuation 22
Fig. 8. Voltage Minor Loop 22
Fig. 9. Three-Pharse Rectifier a Parallel Circuit 24
Fig. 10. Rectifier Output Characteristic Curve 24
Fig. 11. Minor Loop Characteristic Curve 25
Fig. 12. Voltage Control Loop Delivery a Function 26
Fig. 13. Currunt Control Loop Block Diagram 27
Fig. 14. Close Loop Delivery a Function 28
Fig. 15. Voltage Control Close Loop Distinctive 28
Fig. 16. DC Motors Close Loop 29
Fig. 17. DC Motors Delivery a function Response 29
Fig. 18. Equivalent Feedback Signal 31
Fig. 19. Speed Control Loop 32
Fig. 20. Current Control Loop 32
Fig. 21. Current Control Loop Close Distinctive 32
Fig. 22. Speed & Current Control Loop Distinctive 1 34
Fig. 23. Speed & Current Control Loop Distinctive 2 34
Fig. 24. Speed & Current Control Loop Distinctive 3 35
Fig. 25. Speed & Current Control Loop Distinctive 4 35
Fig. 26. Voltage Blance Block Diagram 37
Fig. 27. Constant Current Block Diagram 38
Fig. 28. Speed and Current Control Diagram 39
Fig. 29. SC CC Pl Regulator 39
Fig. 30. Speed and Current Control Regulation Diagram 40
Fig. 31. Motor Side Block Diagram 41
Fig. 32. Motor Side Block Equivalent Circuit 41
Fig. 33. e1 ~ e2 Close Loop Bode 42
Fig. 34. Current Control Loop Block Diagram 43
Fig. 35. Current Control Loop Bode 43
Fig. 36. Converter Current Limiter Control Loop Block Diagram 44
Fig. 37. Converter Current Limitern Control Logic Diagram 44
Fig. 38. Time Belay Limiter Structure 48
Fig. 39. Time - Load Factor Characteristic 49
Fig. 40. Time Delay Limiter movement concept 51
Fig. 41. Time Delay Limiter movement concept An 52
Fig. 42. Over Load Set Up 54
Fig. 43. Over Load Set Up Interest 55
Fig. 44. Thyristor And Motor Over Load Set Up 56
Fig. 45. Main Motor Over Load Detection organization 57
Fig. 46. No1 Hot Strip Mill Main Motor Time Set Up Curve 58
Fig. 47. Maintenance Panel Data Reading 59
Fig. 48. Amature Main Thyristor Panel Check Point 61
Fig. 49. front of Rear 64
Fig. 50. Moment instant Time Delay Over Load Test 66