臺灣博碩士論文加值系統

矽鋼片的鐵損，對電機機械裝置的效率、特性與成本影響甚巨。不同的電壓輸入方式，也會改變矽鋼片的鐵損特性。本文主要控制不同的電壓訊號，輸入至依照ASTM標準所製做的鐵損測試器，量測分析矽鋼片的鐵損特性。研究內容分為三部份：(1).磁化曲線與鐵損量測-完成量測矽鋼片S50、K18的磁化曲線與鐵損特性曲線，並與矽鋼片S18的測試資料比較。(2).磁滯曲線與鐵損量測-利用兩個不同頻率的正弦波，以漸次疊加高次諧波方式來產生控制訊號，並改變兩個正弦波的強度比值、頻率比值和相位角，量測矽鋼片S18在非諧和波下的鐵損。(3).PWM訊號波下的鐵損量測-探討脈寬調變訊號下，不同的振幅調變指數與頻率調變指數，對矽鋼片S18所造成的鐵損影響。

Iron losses in silicon steel sheets significantly affect the efficiency, properties, and cost of electric machinery. Different kinds of input waveforms lead to different levels of iron loss. In this thesis, we study the iron losses of silicon steel sheets under different kinds of magnetizing waveforms by using a standard 25cm Epstein tester. This thesis can be divided into three parts. First, we measure the magnetization curves of three different kinds of silicon steels under sinusoidal waves. Secondly, the effects of flux harmonics on the iron losses are examined. To this end, we measure the hysteresis curves due to periodic flux waveforms composed of a 60 Hz fundamental and a single harmonic. The harmonic has different values of amplitude and phase relative to the fundamental component. Finally, we study the influence of PWM waveform parameters on the iron losses in silicon steels.

第一章 導論…………………………………………………………………1
1.1 研究動機……………………………………………………………1
1.2 文獻回顧……………………………………………………………2
1.3 研究內容……………………………………………………………3
第二章 實驗原理與控制……………………………………………………4
2.1 試驗器原理…………………………………………………………4
2.2 實驗架構……………………………………………………………6
2.2.1 Epstein鐵損測試器…………………………………………6
2.2.2 週邊儀器設備 ………………………………………………8
2.2.3 儀器配置 ……………………………………………………9
2.3 輸入電壓之控制方式 ……………………………………………12
2.3.1 一般信號輸入………………………………………………12
2.3.2 脈寬調變(PWM)信號輸入 …………………………………14
2.4 量測步驟與數值計算 ……………………………………………19
2.4.1 量測步驟……………………………………………………19
2.4.2 數值計算……………………………………………………25
第三章 實驗結果 …………………………………………………………30
3.1 磁化曲線與鐵損量測 ……………………………………………30
3.2 磁滯曲線與鐵損量測 ……………………………………………37
3.2.1 雙諧和波疊加訊號下之鐵損量測…………………………37
3.2.2 相位角之影響………………………………………………50
3.3 PWM訊號波下之鐵損量測…………………………………………56
3.4 實驗問題與解決方式 ……………………………………………60
第四章 結論 ………………………………………………………………61
參考資料……………………………………………………………………63
附錄A ………………………………………………………………………65
附錄B ………………………………………………………………………66

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