本論文主要研製「X光機高壓電源供應器」。X光機電源係由高壓電源和燈絲電源兩部分所組成。高壓電源部分採用全橋相移轉換器結合高升壓變壓器及倍壓電路，其控制方式係採用相移式脈波寬度調變技術，利用改變相角度以達到所需之高壓；而燈絲電源係由推挽式轉換器產生之電源應用於燈絲預熱。藉由高壓輸出兩端分別接在陰極燈絲和陽極兩端與燈絲電流預熱，俾使X光機產生X光。
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，研製一輸出電壓50kV～100kV電路及燈絲輸出電壓3-5V之電路，並以實驗結果驗證電路性能與可行性。

關鍵字：X光機、全橋相移、倍壓電路、燈絲預熱、高壓電源供應器

In this thesis, a high voltage power supply for X-ray generator is studied and implemented. X-ray power supply is composed of high voltage power supply and filament circuit. The high voltage power supply consists of a full-bridge converter, a series resonant tank, a high step-up transformer and a voltage multiplier, which utilizes phase-shift control scheme to control the power supply for achieving high voltage output. The filament circuit employs push-pull topology to generate preheated power. When the filament is preheated and the high voltage output terminal is crossed on X-ray’s anode and cathode, the X-ray tubes is derived.
Finally, a laboratory full-bridge prototype of 50-100 kV with adjustable voltage output and a push-pull circuit for the filament circuit of output voltage 3-5 V has been implemented to verify the theoretical analysis.

Keywords：X-ray generator, full-bridge phase-shifted, voltage multiplier, filament preheater, high-voltage power supply

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