單開關三相昇壓式整流器以元件數少、控制電路簡單、相對的低電流失真及高效率獲得工業上廣泛的應用，然而整流器於較低之昇壓比，因5次諧波電流無法合乎IEC61000-3-2 Class A規範，影響其功率應用範圍。諧波注入技術，可減少整流器所產生之5次諧波電流，使整流器在較低之昇壓比，仍能合乎IEC61000-3-2 Class A規範，獲得較高之輸出功率。本文首先推導諧波注入技術降低電流諧波之理論分析，接著探討不同諧波注入技術應用於單開關三相昇壓式整流器，其昇壓比與輸入功率關係，最後並以實驗證明此方法的可行性。

The single-switch three-phase boost rectifier is an attractive solution because of its simplicity, relatively good performance and high efficiency. However the single-switch three-phase boost rectifier can not be pushed to high power levels due to the fifth harmonics of the input current. An approach employing harmonics injection is proposed to reduce the fifth harmonics to meet the IEC61000-3-2 class A requirement without significantly increasing the rectifier voltage output. In this thesis, the injection principle is analyzed firstly. Then, the relationships of the maximum rectifier input power and voltage gain with different harmonics injection are developed. At least, experimental results are performed to prove the proposed scheme.

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