臺灣博碩士論文加值系統

本文主要目的為研製數位控制功率因數校正器和相移全橋轉換器。前級功率因數校正器的電流控制是採用平均電流控制法，使輸入電流能追隨正弦命令電流而提昇功率因數。後級相移全橋轉換器，其利用相移控制的方式，使轉換器開關達到零電壓導通的特性，進而減少開關上的切換損失；因輸出係低壓大電流，因此變壓器二次側採用電流倍增的架構，以提高轉換器效率。
本文使用德州儀器所生產之32位元TMS320F2812數位信號處理器做為控制平台，達到數位控制的目的。本文所研製的詳細規格如下：
輸入電壓：AC 110V
輸出電壓：DC 12V
輸出功率：360W
切換頻率：100 kHz
實驗結果證明，滿載時效率達到83%，功率因數可達到0.997。

The objective of this thesis is to design and implement digital-controlled power factor corrector and phase-shift full-bridge converter. Average current mode control method is used for the front-end control to achieve in-phase control between the current and its sinusoidal reference to improve the power factor. And phase-shift control is applied to the full-bridge converter to achieve ZVS feature and thereby increasing the efficiency. Since the output is with low output voltage and high output current, current doubler rectifier is used on the secondary side of full converter.

The digital signal processor, TMS320F2812, TI, is used as the controller for the realization. The specifications of the converter are as follows:
Input voltage = AC 110V
Output voltage = DC 12V
Output power = 360W
Switching frequency = 100kHz
Experimental results show that the efficiency can go up to 83 % and power factor is 0.997 under full load condition.

摘要 i
ABSTRACT ii
誌 謝 iii
目 錄 iv
表目錄 vi
圖目錄 vii
第一章 緒論 1
1.1 研究動機 1
1.2 研究目的 3
1.3 章節概述 4
第二章 功率因數校正器 5
2.1 昇壓型功率因數校正器的動作原理 5
2.2 昇壓型功率因數校正器的電路模型與轉移函數 7
2.3 昇壓型功率因數校正器元件的設計 13
2.3.1 電感設計 13
2.3.2 輸出電容設計 14
2.4 昇壓型功率因數校正器的控制法則 14
第三章 相移全橋轉換器 19
3.1 相移全橋轉換器的動作原&;#63972; 19
3.2 相移全橋轉換器的電路模型及轉移函數 25
3.2.1 傳統全橋轉換器小訊號模型 26
3.2.2 責任週期與有效責任週期的分析 32
3.2.3 相移全橋轉換器小信號電路模型 35
3.3 相移全橋轉換器元件的設計 37
3.3.1 變壓器設計 37
3.3.2 輸出電感設計 40
3.3.3 輸出電容設計 41
3.3.4 諧振電感設計 41
3.4 相移全橋轉換器的控制法則 42
第四章 實測系統與結果 44
4.1實驗系統 44
4.1.1 回授電壓隔離電路 45
4.1.2 開關啟動電路 46
4.2 程式設計 46
4.2.1 程式設計流程 46
4.2.2 軟體控制時序 48
4.3 實驗結果 49
4.3.1 實驗波形圖 50
4.3.2 整體電路之效率與諧波 56
第五章 結論與未來展望 59
5.1 結論 59
5.2未來展望 59
參考文獻 60
附錄一 實體電路圖 63

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