本論文主要目的為設計一具自然箝位雙向全橋柔切轉換器之研製。該雙向轉換器主要用於直流電源與蓄電池之間具有雙向能量傳遞功能。於充電時，藉由相移控制達到零電流切換，再利用額外之箝位二極體與漏感達到自然箝位功能。於放電時，利用電流前饋方式將能量由電池傳送至直流電壓，並於電感儲能期間，對變壓器漏感加上一適當時間之直流電壓，以降低主功率開關的電壓應力而不需使用緩振電路。最後，由數位信號處理器TMS320F28035作為控制器，來實現實現一輸入電壓為400V，輸出電壓為350-400V，最大輸出功率為4kW的系統。於充電時，75%負載時系統之最高效率可達98.2%。

The main purpose of this thesis is to design and implement a bidirectional full-bridge phase shift converter with snubber-less natural clamping. In the charging stage, the phase shift control is used to achieve zero-voltage-switching and two additional clamping diodes and a small resonating inductance are used for natural clamping. In the discharging stage, the current fed technique is used for transferring energy between the battery and dc bus. By applying the dc bus voltage to the leakage inductance of the transformer for an appropriate time duration, during the inductance energy storing period in battery side, the voltage spike on main power switches can be reduced without snubber circuits. Finally, the digital signal processor, TMS320F28035, is used as the controller to realize the laboratory prototype with bus voltage 400 V, battery voltage 350-400 V and rated power 4kW. During the charging stage, the maximum efficiency is 98.2% at 75% load.

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