本文將對圖騰柱無橋式交直流功率因數修正器的動作原理、功率元件設計、回授電路設計、控制迴路分析、數位控制迴路分析、數位補償器設計以及諧波抑制方法作詳細探討，並以數學理論為基礎，與模擬和實測結果作驗證。另一方面，由於此架構沒有輸入整流二極體，使得共模電磁干擾比傳統功率因數修正器大；同時為了提高效率，在慢速臂開關的選擇上，會以低導通電阻做為主要考量，而此元件又以超級接面的結構為主，因輸出電容非線性的影響，在輸入電壓零交越後，產生電感電流突波和共模電流突波的問題，透過數學理論，從該架構電磁干擾模型推導出突波電流的關係式，並和套用零交越軟啟動的解決方案做比較，分析對總諧波失真和電磁干擾的影響，最後提出設計準則，以供不同的慢速臂開關使用。在最後的共模電磁干擾測量結果中，使用零交越軟啟動後，在頻率點1.7 MHz、2.6 MHz、5.4 MHz、14 MHz處，峰值下降幅度超過15 dB，因此證明零交越軟啟動能夠有效抑制共模電流突波。

This dissertation will based on mathematical to analysis Totem-Pole bridgeless ACDC PFC converter in detail. Which include operation principle, power component design, feedback circuit design, control loop analysis, digital control loop analysis, digital compensator design and harmonic suppression strategies. Then verify with simulation and experimental results. On the other hands, due to lack of rectifier. The common mode EMI is higher than conventional Boost PFC converter. In order to improve efficiency. The small RDS(on) MOSFET usually use as slow leg’s switch. The most of these are Super Junction structure. Because of its non-linear Coss characteristic. The common mode current spike will occur at every AC zero-crossing point. By derived this current spike’s equation from EMI model in mathematical theory. And then compare with adopt zero-crossing soft-start solution. Find the relationship in input current THD and EMI result. Then proposed a design procedure. In the CM-EMI experimental result, after use ZCSS. The frequency at 1.7 MHz, 2.6 MHz, 5.4 MHz, 14 MHz. These noise level are reduced over 15 dB. Therefore, the ZCSS can suppress CM-EMI significantly.

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