本論文主要探討與研製具主動功率因數修正電路(Power Factor Correction, PFC )之高壓電源供應器。此電路主架構為前級主動PFC，後級連接全橋相移換流器結合高昇壓變壓器及倍壓電路。全橋換流器之控制方式係採用相移式脈波寬度調變技術，利用改變相移角度以達到所需之高壓。本文針對所提出之電路架構，探討其動作原理分析與理論推導。最後，研製一輸入電壓85~270VAC，輸出電壓400V之功率因數修正電路，提供後級穩定之輸入電壓，經高壓電源轉換器升壓後達到輸出50kV～90kV，並以實驗結果驗證電路性能與可行性。

In this thesis, a high voltage power supply with power factor correction(PFC) is studied and implemented. The high voltage power supply consists of a PFC, a full-bridge converter, a series resonant tank, a high turn ratio transformer and a voltage doubler, which utilizes phase-shift control scheme to control the power supply for achieving high DC voltage output. Finally, this thesis implements a PFC with input voltage 85~270VAC and output voltage 400VDC to provide a stable input voltage Vbus for high voltage converter. The high voltage converter will then boost the voltage of Vbus to 50~90 kV as system DC output voltage. A laboratory prototype of the proposed high voltage power supply with PFC is implemented to verify the theoretical analysis.

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