有源功率因數校正技術

摘要：應用有源功率因數校正（APFC）技術，可以控制整流器的輸入電流，使其具有所需的波形，提高了電網的功率因數，甚至接近1。應用APFC的整流器稱為高功率因數整流器，或輸入電流波形整形電路。APFC技術的另一重要的優點是，可有效控制其輸出電壓，并與輸入電壓的變動無關。 敘詞：AC-DC變換器 整流器 輸入電流（波形）整形電路 高功率因數 有源功率因數校正 Abstract：The input currents of the rectifiers can be corrected by the active power factor correction(APFC) technology to have desired waveforms,increasing the input power factor of the rectifiers,even to unity,which are called high power factor rectifiers or input current shapers.The another important advantage of APFC techniques is that their output voltage can be actively controlled and can be independent of the input voltage variations. Keyword：AC-DC converter rectifier input current shaper high power factor active power factor correction(APFC)