本論文主要在研製一「具零電流切換之電流饋入型推挽式高壓轉換器」。此電路之前級為降壓轉換器，利用定頻PWM控制技術，以調節輸出電壓；後級為推挽式轉換器，主要將能量由低壓側轉換至高壓側輸出。此外，將轉換器變壓器之雜散元件整合於共振槽中，利用共振的方式使推挽級開關達到零電流切換，也可避免電路發生非預期之共振現象。本論文首先針對各類相關之轉換器做一介紹，再對所提出之轉換器做動作原理敘述及穩態分析。最後，完成輸入電壓為400 V、輸出電壓為5 kV、輸出功率為1 kW之電路雛型，以驗證理論之可行性。

In this thesis, a current-fed push-pull high voltage converter with zero-current switching (ZCS) is studied and implemented. The first stage is a buck converter that utilizes pulse width modulation (PWM) to regulate the output voltage. The second stage is a push-pull converter which is used to transfer energy from low voltage side to high voltage side. Moreover, the stray components of the high voltage transformer are integrated into the resonant tank of the current-fed push-pull converter. Thus, the proposed converter can achieve ZCS operation of the active switches of the push-pull converter, and the unpredictable resonant phenomenon can be avoided. The characteristics of the various topologies are expressed. The operating principles of the proposed converter are presented, and the steady-state analysis is also discussed in this thesis. Finally, a laboratory prototype with 400 V input and 5 kV/1 kW output is implemented to verify the theoretical analysis.

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