數位無橋功率因數修正器的研製

本論文研製一無橋功率因數修正器，主要目的為提高功率因數和轉換效率，並且提供後級穩定的直流電源。其切換頻率為50kHz，輸出電壓為400V。控制方法採用平均電流模式控制，改善其功率因數、增加轉換效率以及減少電流諧波。　　本論文研製的數位無橋功率因數修正器規格為：輸入電壓100V和200V，輸出電壓為400V及最大輸出功率為600W。利用數位控制器TMS320X28035PN來設計與實現無橋功率因數修正器，由實驗結果得知，當輸入電壓為100V最高效率可達94.85%，當輸入電壓為200V最高效率可達96.66%；其功率因數在半載以上均可達到0.95以上。

關鍵字

無橋轉換器；功率因數修正器

並列摘要

This thesis designs and implements a digital-controlled bridgeless power factor corrector in order to provide a well regulated DC voltage. The switching frequency = 50kHz and its output voltage = 400 V. The bridgeless PFC is with fixed switching frequency and average-current mode control to improve the power factor, increase the efficiency and lower the current harmonics. The specifications of implemented bridgeless PFC include: input voltage are 100V and 200V/50Hz, output voltage is 400V and maximum output power is 600W. The digital controller of bridgeless PFC is the DSP TMS320X28035PN. Experimental results show that the peak efficiency is up to 94.85% under input is 100V and 96.66% under input voltage is 200V. Moreover, the power factor is greater 0.95 as load is greater than 50%.

並列關鍵字

Bridgeless converter ； power factor corrector

參考文獻

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