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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 顏家鈺 | |
dc.contributor.author | Cheng-Ju Wu | en |
dc.contributor.author | 吳政儒 | zh_TW |
dc.date.accessioned | 2021-06-16T23:19:06Z | - |
dc.date.available | 2022-07-31 | |
dc.date.copyright | 2012-08-10 | |
dc.date.issued | 2012 | |
dc.date.submitted | 2012-08-01 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/65051 | - |
dc.description.abstract | 電磁鋼片主要是用來作為電機機械中的導磁媒介,經過激磁之後就會產生良好的磁性。如何使電機機械達到高效能的使用是很重要的議題。鐵損值是電磁鋼片非常重要的品質管制項目,現今機械設備多操作在非正弦波下,這使得鐵損值的變化將不會像以往的單純。研究重點在於靜態電磁鋼片操作非正弦波電壓波形下的電磁特性分析,包括多功能量測系統軟硬體的建置、環形可拆式框架的設計以及電磁鋼片在非正弦波電壓波形下的電磁特性分析。
實驗上参照IEEE以及ASTM標準規範,開發完成電磁鋼片之自動化電磁特性量測系統。並在以環形電磁鋼片為實驗基礎下,設計一組環形重複可拆式量測框架。量測上適用於高頻率(50–5,000 Hz)、高磁通密度(0.2–1.9 T)、高溫度(25–300 oC)以及不同厚度電磁鋼片的量測。具有良好的鑑別性,且可操作在正弦波與非正弦波電壓波形下。 研究內容分為三個部分:(一)設計一套可重複使用的標準化環形框架量測治具,開發完成多功能電磁鋼片之自動化電磁特性量測系統。(二)討論不同操作電壓波形、調變參數以及形狀因子係數對於鐵損大小的影響。並且藉由分析感應電壓的總諧波失真因數THDV-R來衡量電磁鋼片能量損失的程度,得知操作波形與鐵損值大小的趨勢。(三)分析電磁鋼片操作在非正弦波下的磁滯曲線組成(主磁滯曲線Major loop、小磁滯迴圈 Minor loop),探討小磁滯迴圈所產生的原因以及所造成的影響。並且透過改變調變參數,計算小磁滯迴圈所產生的鐵損佔總鐵損的比例。使得在馬達控制與設計中,避開操作在不當的非正弦波電壓下而產生的額外能量損失。 本研究藉由一開始的基礎實驗之紮根,然後完成硬體量測設備的設計,到最後實驗的核心:電磁鋼片操作在非正弦波電壓下的能量損失之討論分析,做了深入的研究與分析。藉由上述實驗結果的分析,可以得到電磁鋼片的鐵損損失與操作波型、調變參數之間的聯結。以便將來應用在馬達或是變壓器的設計上,使其可以操作在較低能量損失的電壓波形下,而且在操作上顯得更為有效率。 | zh_TW |
dc.description.abstract | Electronic machinery such as motors, transformers, and power generators is essential and common in daily life. Such equipment generally employs silicon-steel sheets as the material for the iron core. The different thicknesses and types of silicon-steel sheets used in the manufacture of various types of electronic machinery results in significant differences in efficiencies, characteristics, and energy losses.
Motors are now often supplied with a sinusoidal pulse-width-modulation (SPWM) input from electronic controllers rather than with a traditional sinusoidal waveform input, which makes it necessary to characterize the electromagnetic properties of silicon-steel sheets under nonsinusoidal waveforms such as SPWM. In order to experimentally determine the iron losses and harmonic characteristics of silicon-steel sheets operating under nonsinusoidal waveforms, including in the research and development of a silicon-steel-sheet measurement system, a reusable and standardized toroidal test frame for testing toroidal laminated silicon-steel sheets was designed, and the electromagnetic properties of silicon-steel sheets operating under nonsinusoidal waveforms were analyzed. This study referred to IEEE and ASTM standards when self-designing a detachable standardized toroidal test frame for measuring the iron losses of toroidal laminated silicon-steel sheets and for determine the effects of winding tolerances to allow precise comparisons of the characteristics of similar devices. The test frame can be used to measure the electromagnetic characteristics of various thicknesses of laminated silicon-steel sheet at high frequencies (50–5,000 Hz) and high magnetic flux densities (0.2–1.9 T). Moreover, it can withstand high temperatures (25–300OC) for a short period and can be operated under both sinusoidal and nonsinusoidal voltage waveforms. The experimental content of this dissertation is divided into three parts: (1) research and development of a silicon-steel-sheet measurement system and the development and design of a reusable and standardized toroidal test frame; (2) analysis and discussion of the effects of the operating voltage waveform, modulation index, total harmonic distortion, and form-factor coefficient on the iron loss of silicon-steel sheets; and (3) analysis of the major and minor hysteresis loops when silicon-steel sheets are operating under nonsinusoidal waveforms. Moreover, the operation of laminated silicon-steel sheets under different modulation indexes and the excitation of secondary hysteresis curves relative to the total iron loss are discussed. The results obtained for the relationship between the iron loss and modulation index in current electrical-motor designs incorporating silicon-steel sheets and operating under nonsinusoidal voltage waveforms such as SPWM, pulse could help to identify motor designs and voltage waveforms that produce smaller iron losses and higher working efficiencies. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T23:19:06Z (GMT). No. of bitstreams: 1 ntu-101-D96522036-1.pdf: 6492448 bytes, checksum: 745b0d40060a9d1f55d0ddbca4c1d47d (MD5) Previous issue date: 2012 | en |
dc.description.tableofcontents | 審定書 iii
誌謝 v 摘要 vii Abstract ix 目錄 xi 圖目錄 xv 表目錄 xxi 符號表 xxiii 第一章 序論 1 1.1 研究動機與目的 1 1.2 文獻回顧 4 1.3 研究內容 15 1.4 論文架構 17 第二章 實驗原理 19 2.1 鐵損概述 19 2.2 鐵損的計算 20 2.2.1 磁場強度與磁通密度 20 2.2.2 鐵損 21 2.3 感應電壓的形狀因子係數 24 2.4 鐵損以及磁滯損的介紹 26 2.4.1 磁滯損 (Hysteresis Loss, Wh) 26 2.4.2 鐵損與磁滯損的差異與量測 27 第三章 量測系統架構與硬體開發 29 3.1 環形可拆式框架的設計 29 3.1.1 傳統環形變壓器 29 3.1.2 現有問題 31 3.1.3 問題改善 31 3.1.4 新環型結構設計與舊型結構差異比較 33 3.1.5 新環型結構標準製作流程 38 3.1.6 測試用電磁鋼片 41 3.1.7 空氣磁通補償線圈 42 3.1.8 環形測試器實驗結果 43 3.2 實驗架構與方法 49 3.2.1 實驗架構 49 3.2.2 波型產生 50 3.2.3 實驗儀器與設備 55 3.2.4 實驗環境與材料保存 55 3.3 多功能電磁鋼片之自動化電磁特性量測系統的開發 56 3.3.1 PWM換流器設計 58 3.3.2 多功能電磁鋼片量測系統電路控制板功用 63 3.3.3 電力量測規範 67 3.3.4 人機介面設計 69 3.3.5 量測系統重現性 72 第四章 鐵損討論 75 4.1 操作電壓波形與參數 75 4.2 形狀因子係數的影響 95 4.3 感應電壓頻譜與諧波 98 4.3.1 頻譜與諧波分析 98 4.3.2 由頻譜討論感應電壓所產生之諧波對於鐵損的影響 101 4.4 討論 112 4.4.1 振幅調變指數ma≦1.0(線性調變區) 112 4.4.2 振幅調變指數ma>1.0(過調變區) 112 4.4.3 頻率調變指數mf<20 113 4.4.4 頻率調變指數mf≧20 113 4.4.5 責任週期Duty cycle 114 第五章 PWM波形下的磁滯迴線分析 121 5.1 MAJOR LOOP以及MINOR LOOP的現象分析 121 5.2 MINOR LOOP的計算方法 126 5.3 實驗結果以及MINOR LOOP對於鐵損的影響 129 5.4 利用PWM電壓波形的頻譜分析估測鐵損(疊合PWM電壓下的諧波頻率對應到正弦波頻率的鐵損值估測PWM波形的鐵損值大小) 133 第六章 結論與未來展望 143 6.1 結論 143 6.1.1 基礎理論與實驗部分 143 6.1.2 在非正弦波電壓下的能量損失之結論 144 6.1.3 硬體量測設備 147 6.2 研究貢獻 148 6.3 未來展望 149 參考文獻 151 | |
dc.language.iso | zh-TW | |
dc.title | 電磁鋼片於非正弦波下之鐵損及諧波特性的量測與研究 | zh_TW |
dc.title | A Research in the Iron Loss and Harmonic Characteristics of Silicon Steel Sheets Operated Under Non-Sinusoidal Waveforms | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-2 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 黃議興,陽毅平,王富正,李綱 | |
dc.subject.keyword | 鐵損,電磁鋼片,環形電磁鋼片,Epstein測試器,脈寬調變,諧波分析,磁滯曲線, | zh_TW |
dc.subject.keyword | Iron loss,Silicon steel sheet,Toroidal silicon steel sheet,Epstein frame,PWM,Harmonic analysis,Hysteresis curve, | en |
dc.relation.page | 156 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2012-08-01 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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