臺灣博碩士論文加值系統

近年來電子產品的應用越來越廣泛，相對也越來越多的電源控制將由直流升降壓轉換器來管理。由於電流量測方法對於直流降壓轉換器的品質控管影響甚巨，因此本論文擬對現今電流量測方法的缺失，提出改善的對策。
本論文研究一種低成本、影響效率較低的量測方法，稱為電感內阻電流檢測法，並與檢測電阻電流檢測法比較其優缺點。電感內阻電流檢測法建置一組額外的電阻和電容的串聯電路與檢測電流的電感(寄生直流內阻)並聯，但不改變直流降壓轉換器的架構，且對轉換效率影響很小，適合於低損耗直流降壓轉換器電流量測電路，
實驗結果顯示，若是系統需要精準電流資訊，又能夠承受檢測時功率損耗，且使用空間夠大，檢測電阻電流檢測法就是最佳的選擇，但如果系統無法承受檢測電流時的額外功率損耗、且使用空間有很大的限制，並可接受電流精準度誤差內，電感內阻電流檢測技術就是最適合的選擇。

In recent years, the application of electronic devices is widely spread. DC-DC converters are increasingly important due to their use for power control of the electronic devices. Because current detection significantly affects the quality control of DC-DC buck converters, this thesis is aimed to research an improvement strategy on current detection to overcome the disadvantages of the commonly used current detection scheme.
The thesis focuses on finding a current detection scheme, named inductor DC resistance sensing , for the purposes of low cost and low power conversion loss, as well as its strength and weakness as compared to the resistor sensing method. The inductor DC resistance sensing method uses a series resister-capacitor circuit connected with an inductor (parasitic DC resistance) in parallel, which doesn’t alter the converter’s structure and affect little power conversion efficiency, thus is suitable for current detection of low power loss DC-DC converters.
Experimental results show that the resistor sensing method is better if system needs precise current detection, available space is large enough and power loss is endurable. Otherwise, the inductor DC resistance sensing method is the better choice for current detection.

論文摘要 I
ABSTRACT II
誌謝 III
目次 IV
圖目錄 VI
表目錄 VII
第一章、概論 1
1.1 研究動機 1
1.2 研究方法與目的 2
1.3 論文架構 3
第二章、直流電壓轉換器之回顧 5
2.1 直流轉換器種類 5
2.2 線性穩壓器 6
2.3電容儲能式切換穩壓器 6
2.4 電感儲能式切換穩壓器 7
2.4.1 非同步降壓型電感儲能式切換穩壓器 8
2.4.2同步降壓型電感儲能式切換穩壓器 9
第三章、電流檢測設計與原理 13
3.1檢測電阻器之電流檢測法 13
3.2電感直流內阻(DCR)電流檢測電路架構 14
第四章、實驗結果 17
4.1無電流檢測元件的實驗 17
4.2檢測電阻的電流檢測實驗 19
4.3電感內阻(固定值)的電流檢測實驗 20
4.4電感內阻(變動值)的電流檢測實驗 21
4.5電流檢測實驗結果分析 23
第五章、結論與未來展望 27
5.1結論 27
5.2 未來研究 27
參考文獻 28

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[8] 國立交通大學-陳世銘
具有高速電流感測器及晶片電感之極小尺寸直流對直流降壓式轉換器
[9] 國巨股份有限公司-YAGEO.
http://www.yageo.com/NewPortal/yageo?service=chipResistors&layer2=Thick%20Film%20General%20Purpose&lang=tw
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http://www.ti.com/product/TPS53318
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[12] 立錡科技-RichtekRT8884B規格書
http://www.richtek.com/assets/product_file/RT8884B