本論文研究以數位單週期控制法研製一單電感無橋式昇壓型高功因交‐直流電源轉換器，其轉換器使用DSP實現數位單週期控制法來提高功率因數值，降低輸入電流諧波失真，並穩定輸出電壓。本數位單週期控制器無須檢測輸入電壓來做為電流命令值；另外，此電路根據不同輸出電壓狀態選擇不同的電壓迴路控制器，提供系統暫態電壓最佳輸出特性。此外，也濾除市電兩倍頻漣波對電壓迴路之影響。
最後，本研究實作一單電感無橋式昇壓型高功因交‐直流轉換器電路，輸入線電壓範圍85VAC~135VAC，輸出電壓400V，最大輸出功率750W。實驗結果顯示利用數位單週期控制的交-直流轉換器具有高功率因數，動態響應佳及降低總諧波失真之特性。

This thesis illustrates design and implementation of a single inductor based bridgeless boost AC-DC converter with power-factor-correction (PFC) , using the digital signal processor control. The converter has high power factor, low current distortion and output voltage regulation. Under the digital one-cycle control, the presented PFC controller does not require input AC voltage sensing for the controller loops reference. The digital one-cycle controller also consists of loop PI controller that can be selected according to different output voltage conditions to enhance dynamic responses of the output voltage, and reduce the impact of twice line frequency component on the output voltage loop.
Finally, an experimental test with input voltage ranging from 85VAC to 135VAC, 400V output voltage and 750W maximum output power is conducted to show that the implemented circuit achieves the expected specifications of high power factor, fast dynamic response and low total harmonic distortion.

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