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研究生:陳柄樺
研究生(外文):Bing-Hua Chen
論文名稱:變頻驅動器短路故障之馬達響應與保護
論文名稱(外文):Motor Response and Protection for Inverter Short-Circuit Faults
指導教授:楊士進
指導教授(外文):Shih-Chin Yang
口試委員:許煜亮劉承宗周柏寰賴炎生
口試日期:2018-07-16
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:機械工程學研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:106
語文別:中文
論文頁數:83
中文關鍵詞:永磁同步馬達對稱型短路非對稱型短路退磁
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本篇論文研究目的在於永磁同步馬達驅動器可能發生的故障,且將重點放在驅動端最危險的短路故障,當短路故障發生後,驅動器會產生比額定運轉更高的短路電流,不只破壞驅動電路系統,且極有可能損害馬達的磁鐵磁力。
兩種不同的驅動器短路故障將會被討論,分別為對稱型短路故障(Symmetric Short-Circuit Fault-SSC Fault)與非對稱型短路故障(Asymmetric Short-Circuit Fault-ASC Fault),針對對稱型短路故障,本研究試圖推導出故障後的數學模型,並研究不同類型的馬達設計參數對短路故障的影響,進而抑制穩態和暫態故障電流峰值。此外,非對稱型短路故障則被結論是最危險的短路故障,其峰值電流和退磁風險都遠比對稱型短路故障來得高,本研究提出硬體切換保護策略,當非對稱型短路發生時,驅動器會切換成對稱型短路控制,確保馬達在故障後,降低短路峰值電流造成的風險。
本研究所有短路故障的理論,將會藉由電路模擬來佐證,並建立有限元素法馬達模型來評估短路電流產生之退磁風險。最後會針對兩顆不同電氣常數的馬達進行實驗驗證
This paper aims to investigate potential fault characteristics for Permanent Magnet Synchronous Motors (PMSM). The inverter switch short-circuit is the primary focus. When the inverter short-circuit fault occurs, considerable short-circuit currents are induced. They not only damage inverter devices, but also results in the demagnetization in PM motors.
Two common inverter short-circuit faults are investigated. They are respectively Symmetric Short-Circuit (SSC) Fault and Asymmetric Short-Circuit (ASC) Fault. For SSC fault, an analytical model is developed for the faulty motor drive. The influence of fault reflected short-circuit currents on PM motors with different parameters are analyzed. It is shown that the short-circuit current can be suppressed by properly selecting the motor parameters. In addition for ASC fault, the fault reflected short-circuit currents are significantly higher than the currents under SSC fault. A hardware protection strategy based on the SSC operating mode is proposed to mitigate these dangerous short-circuit currents, avoiding the risks in PM motors once ASC fault occurs.
All the analytical models will be verified by the inverter circuit simulation. In addition, Finite Element Analysis (FEA) is performed to investigate the demagnetization of PM motor under either SSC or ASC fault. Finally, two PM motors with different time constants are experimental evaluated to verity electromagnetic responses after fault.
口試委員會審定書 3
致謝 5
中文摘要 7
ABSTRACT 9
目錄 11
圖目錄 14
表目錄 17
符號彙編 19
第 1 章 緒論 21
1-1 研究背景 21
1-2 文獻回顧 21
1-2-1 馬達與驅動器故障調查 22
1-2-2 驅動器開關故障 22
1-2-3 驅動器開路故障 23
1-2-4 驅動器短路故障 27
1-2-5 馬達繞線短路故障 29
1-3 馬達與驅動器故障保護 30
1-3-1 驅動器偵錯與保護 30
1-3-2 驅動器開關故障潛在原因 34
1-3-3 馬達偵錯與保護 35
1-4 研究目的 36
1-5 論文大綱 37
第 2 章 短路故障後馬達響應 40
2-1 馬達故障模型推導 40
2-1-1 健康永磁馬達與驅動模擬模型 40
2-1-2 馬達特徵電流定義 44
2-2 對稱型短路故障(Symmetrical Short-Circuit Fault-SSC) 45
2-2-1 無載情況下的數學模型 46
2-2-2 時間常數對於故障電流的影響 47
2-2-3 速度相依性 48
2-2-4 動態模擬 49
2-3 單相非對稱型短路(Asymmetrical Short-Circuit-ASC) 52
2-3-1 時間常數對於故障電流的影響 53
2-3-2 速度相依性 54
2-3-3 動態模擬 54
第 3 章 短路故障後馬達退磁影響 56
3-1 有限元素法模型介紹 56
3-2 SSC 退磁分析 57
3-3 ASC退磁分析 58
3-4 馬達保護設計建議 59
第 4 章 實驗結果 62
4-1 故障電流與力矩輸出 64
4-1-1 IPM馬達模擬和實驗比較 65
4-1-2 SPM馬達實驗結果 69
4-2 故障切換從ASC轉換SSC 73
第 5 章 結論與未來研究方向 76
5-1 三相對稱短路(SSC)故障 76
5-2 單相非對稱短路(ASC)故障 77
5-3 未來工作 77
參考文獻 80
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