臺灣博碩士論文加值系統

本文提出一個應用於行波管的高壓電源供應器，它採用降壓電流饋入型全橋功率轉換器，以降低高壓變壓器高漏感對效率的影響，其降壓轉換器切換頻率為100 kHz，可以減少整個電源供應器的体積及重量。高壓變壓器繞線用19 kV絕緣線，另外利用高壓二次側分組倍壓整流濾波，以獲得行波管的陰極及兩組集極所需的高電壓。文中將提出高壓電源供應器分析和設計的方法，並以電腦模擬及以實驗室100 kHz、10 kV、1 kW原型電路，驗證所提方法的可行。

A high voltage power supply applied to the traveling wave tube (TWT) is proposed in this paper. A Buck current-fed full bridge converter is used to reduce the effect of leakage inductances of high voltage transformer for improving the performance. The switching frequency of the converter is chosen at 100 kHz to reduce the size and weight of power supply. The transformer windings utilize 19 kV insulation wire. The high voltage output rectifier and double voltage multiplier provided the need for multiple high voltage outputs for cathode, collector-1, collector-2 of the TWT, respectively. This paper mentioned the simply scheme to develop and design the high voltage power supply. Finally, computer simulation and experimental results of laboratory prototype with 100 kHz、10 kV and 1 kW output are presented to demonstrate the feasibility of circuit topology.

目錄
中文摘要 ……………………………………………………………………i
英文摘要……………………………………………………………………ii
目錄…………………………………………………………………………iv
表目錄 ……………………………………………………………………vii
圖目錄……………………………………………………………………viii
第一章 緒論…………………………………………………………………1
1.1摘要………………………………………………………………………1
1.2前言………………………………………………………………………1
1.3本文重點…………………………………………………………………2
1.4論文大綱…………………………………………………………………3
第二章 行波管介紹…………………………………………………………4
2.1行波管簡述………………………………………………………………4
2.2簡述行波管各部分功能介紹……………………………………………6
2.3行波管高壓電源與輻射相位角關係[11]………………………………7
2.4行波管應用於連續波(CW)之電氣規格簡述……………………………9
2.5本章結論…………………………………………………………………9
第三章行波管放大器電源系統及工作原理………………………………10
3.1電源系統方塊圖描述 …………………………………………………10
3.2工作原理 ………………………………………………………………10
3.2.1降壓電流饋入型全橋轉換器工作原理 …………………………13
3.3電源供應器EMI濾波與整流電路………………………………………18
3.3.1 電源供應器EMI簡述………………………………………………19
3.3.2 電源供應器EMI濾波電路零件設計………………………………23
3.3.3 共模濾波電路設計 ………………………………………………24
3.3.4 差模濾波電路設計 ………………………………………………25
3.4 行波管放大器電源電路分析與設計…………………………………26
3.4.1 行波管電源需求部分規格 ………………………………………26
3.4.2 高壓電源電路設計分析 …………………………………………26
3.4.2.1 降壓轉換器工作週期設計……………………………………27
3.4.2.2 高壓變壓器圈數比設計………………………………………28
3.4.2.3 降壓轉換器電感值設計………………………………………29
3.4.2.4 倍壓整流濾波與高壓分壓電路設計…………………………29
3.4.2.5 場效電晶体驅動電路設計……………………………………32
3.4.2.6 行波管放大器燈絲電壓電路設計……………………………33
3.4.2.7 行波管放大器高壓電源保護電路設計………………………33
3.5本章結論 ………………………………………………………………35
第四章緩衝電路(Snubber)設計 …………………………………………36
4.1前言 ……………………………………………………………………36
4.2被動式緩衝電路 ………………………………………………………36
4.2.1 RCD緩衝器電路設計………………………………………………41
4.2.2 RLD緩衝器電路設計………………………………………………41
4.3主動式緩衝電路 ………………………………………………………44
4.4本章結論 ………………………………………………………………46
笫五章 TWT驅動之高壓電源供應器閉迴路分析與設計…………………47
5.1閉迴路分析 ……………………………………………………………47
5.2 PWM控制策略的選取 …………………………………………………49
5.3 平均電流模式…………………………………………………………49
5.4 閉迴路電路設計[37]…………………………………………………51
5.5 電壓迴路零點、極點之決定…………………………………………52
5.6 電流迴路零點、極點之決定…………………………………………55
5.7 降壓型轉換器小信號分析[42]………………………………………57
5.8 PSpice 模擬比較迴路響應…………………………………………59
5.9本章結論 ………………………………………………………………61
第六章 模擬分析與實作量測結果 ………………………………………62
6.1 電腦模擬分析…………………………………………………………62
6.2 實測波形分析…………………………………………………………66
第七章 結論與建議 ………………………………………………………74
參考文獻……………………………………………………………………75
作者簡歷……………………………………………………………………82

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