本論文實現變頻三角形電流模式圖騰柱無橋式功率因數修正器。在一個輸入電壓週期內，皆可實現零電壓切換。本文提出一種不需外部零電流偵測電路的三角形電流模式控制。利用平均電流控制法中的平均電流命令、輸入電壓、輸出電壓及電感等參數，計算可達零電壓切換的切換頻率。利用PSIM電路模擬軟體，驗證本文所提出控制方法之可行性，最終實現變頻範圍60 kHz~180 kHz、輸入電壓230 Vrms、輸出電壓400 V、輸出功率800 W，最高效率可達98.02%的圖騰柱無橋式功率因數修正器。
關鍵字：三角形電流模式、零電壓切換、圖騰柱無橋功率因數修正器、平均電流控制法、零電流偵測電路

This thesis presents a triangular current mode totem-pole PFC rectifier with variable frequency. It can achievd ZVS over the full input voltage range. This thesis proposes a triangular current-mode control without an external zero current detection circuit. In this thesis, average current-mode control is used to achived high power factor. The period of the duty cycle is calculated using the average current reference, input voltage, and output voltage. PSIM simulation is utilized to verify the feasibility of the proposed control method. Finally, the 800-W bridgeless TPPFC with the proposed control is implemented with the switch frequency around 60 kHz-180kHz, an input voltage of 230 Vrms, and an output voltage of 400 V. The maximum experimental efficiency is 98.02%.
Keywords: Triangular Current Mode, ZVS, Totem-pole PFC, average current control, zero current detection circuit

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