本論文提出一應用太陽能微型換流器之整合耦合電感與切換電容之升降/升壓電路架構。經由階段切換控制將太陽能輸出之直流電壓轉成半正弦波，再經市電頻率全橋換流器轉為交流。升降/升壓轉換器可升壓及降壓，所需之輸出為高壓時，切換成高升壓轉換器﹔所需之輸出為低壓時，切換成升降壓轉換器，使輸出電壓為半正弦波。本文首先針對升降/升壓轉換器的架構進行理論分析、穩態分析、弦波調變公式推導及升降/升壓轉換器的切換控制。最後研製一300 W微型換流器系統，驗證以上的理論分析。太陽能模擬器之輸出電壓20 ~ 40 V，微型換流器輸出為220 Vac / 60 Hz，系統最高效率在滿載且可達93%。

This thesis proposes a buck-boost / boost integrated converter with coupled inductor and switched capacitor for photovoltaic micro-inverter. The proposed stages control modulates the PV dc output to a positive sinusoidal waveform then a main frequency full-bridge inverter is used to generate AC output. To generate a sinusoidal output voltage, wide-ranged voltage gain is needed. The proposed converter is switched to high-boost stage when the output voltage is high, and is switched to buck-boost stage when the output voltage is low. The operating principles, steady-state analysis, sinusoidal modulating design, and stage control method are discussed. Finally, a 300 W prototype micro-inverter is implemented and verified. The PV simulator output voltage is 20 V to 40 V, and the output voltage is 220 Vrms/60 Hz. The maximum efficiency is 93% at the full load condition.

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