效率為98%的單相和三相單級交流-直流變換器拓撲結構

摘要：目前在電力電子技術研究領域，具有隔離和功率因數校正功能的單級AC-DC變換器，均是依賴于全橋整流的新型變換器。當前的單相AC-DC變換器是基于傳統的脈寬調制（PWM）變換方法實現的，它至少包括3個不同的功率信號處理級：全橋整流器、BOOST PFC變換器和串聯隔離式全橋DC-DC變換器，共用到14個開關器件和3個磁性元件，這些都對變換器的效率、尺寸和成本限制產生影響。 敘詞：混合變換方法 AC-DC變換器拓撲 三相整流器 效率 功率因數 Abstract：Single-stage AC-DC Converter having funcionts of isolation and correction of power factor currently used in power electro-magnetic research area rely completely on new converter with whole-bridge rectification. Current single-phase AC-DC converter is realized based on traditional PWM conversion, which includes at least three different power signal transcation rates: whole-bridge rectifier, BOOST PFC converter and in-series isolation whole-bridge DC-DC converter. It uses 14 switch components, and 3 magnetic elements, which affects the efficiency, size and cos of converters. Keyword：Mixed conversion approach, AC-DC Converter topology, Three-phase rectifier, efficiency, Power factor