本文主要針對因橋式整流所產生的電流失真進行改善,並運用UC3854N控制IC來驅動主動功因修正器(Active Power Factor Correction ),進行交流直流轉換提供給全橋反流器(Full Bridge Phase Shift Inverter)作為穩定的電壓輸入,當中使用UC3875控制IC作脈波寬度調變(PWM)控制,使換流器在切換過程達零電壓(Zero Voltage Switching, ZVS)切換,降低切換過程所產生應力及損失,達到能源傳輸的高效率。 新的系統架構(含功因修正器)與傳統式自偶變壓器作為系統提高電壓輸出作為量測的比較,藉此印證電源供應器具低諧波、高功因、高效率及體積小之原則,因此符合電力科技產品所要求的輕、薄、短、小、效率高的要求。
This paper presents the design, experimental results and analysis of an active power factor correction on full bride phase shift inverter, it gives a steady power, low harmonics and high power factor system. And the inverter achieves the Zero-Voltage Switching (ZVS) for reducing power lost. Finally, we could get the power system (include power factor correction) is better than one (include variable transformer) from experimental results, validate the feasibility of the implemented system in high power application.