本論文提出一種用於高功率用途之三相三開關功率因數修正器,該功率因數修正器係由三個熟知的單相單開關功率因數修正電路所組成。高功率因數輸入能夠藉由此一具有簡單架構之功率因數修正器所達成,展頻技術被應用以降低該高頻功率因數修正器所產生之電磁干擾雜訊。該三相功率因數修正器之動作原理與設計考量均已詳細分析與討論,ㄧ部750W雛型電路被實現及測試,其實驗波形驗證了所提出方法的可行性。所研究之高效能三相功率因數修正器具有包括高功率因數、高效率、簡單架構與高可靠度的優點。
In this thesis, a three-phase three-switch power factor corrector (PFC) is presented for high power applications. The power factor corrector consists of three well-known single-phase single-switch circuits. High power factor input can be achieved by the adopted PFC circuit with a simple configuration. A spread spectrum frequency modulation technique is proposed to reduce the electromagnetic interference (EMI) emission caused by the high-frequency PFC circuit. Detailed operating principle and design consideration of the three-phase PFC circuit are analyzed and described. A 750W laboratory prototype was implemented and tested. The experimental waveforms verify the feasibility of the proposed design. The implemented three-phase power factor corrector exhibits merits such as high power factor, high efficiency, simple configuration and high reliability.