本論文提出一植基於最大功率追蹤光伏系統可操作於廣域負載之具零電壓切換全橋相移式充電器電路，配合太陽能板之輸出特性，以類比電路控制太陽能板之輸出電流，達到太陽能板最大功率追蹤之目的，並利用可操作於廣域負載之零電壓切換充電器電路，提高系統輕載效率。其中，具臨界電流導通模式控制法之類比電路，係搭配太陽能電池操作在最大功率點時之特性，以調節太陽能電池之輸出電流，達成最大功率追蹤之目的。此外，藉由設定最大功率追蹤光伏系統定電流輸出，使全橋相移式電池充電器電路之功率開關達到廣域零電壓切換，實現輕重載高效率之目標。
最後，以一440 W雛型電路驗證所採用之臨界電流導通模式控制法，可使太陽能電池操作於最大功率點，並設定最大功率追蹤光伏系統輸出定電流，確保電路在廣域輕重載下皆有零電壓切換效果，達到電路高效率之目的。

In this thesis, the wide load-range ZVS phase-shift full-bridge (PSFB) charger with maximum power point tracking (MPPT) photovoltaic mechanism is developed in order to obtain high efficiency even at light load condition.
According to the output characteristics of the solar cell module, the proposed MPPT photovoltaic system can be implemented with available analog control ICs on the market. Besides, by regulating the input current for the phase-shift full-bridge charger circuit, the wide load-range ZVS of the employed power switches can be ensured.
Finally, the prototype circuit of the proposed wide load-range ZVS phase-shift full-bridge charger with MPPT photovoltaic mechanism is built in order to verify system efficiency at wide load-range.

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