本文的目的是研製數位化控制1kW之交錯式昇壓型功率因數修正器,輸入電壓為 下,其輸出直流電壓為390V。 本文控制兩相昇壓型轉換器功率開關訊號,並且以相差180度的交錯方式導通與截止,以達到減少輸入與輸出之漣波,並改善元件體積以及耐流,此外讓輸入電流與輸入電壓能夠同相位以及調整輸出電壓的功能。採用多迴路控制方式,包含電流內迴路與電壓外迴路,並藉由平均電流控制法實現輸入電流能追隨正弦波輸入電壓,達到功率因數校正目的。利用均流控制方式讓兩相電感電流操作在連續導通模式下,能確保兩相電路可以平均分配負載電流。 經實驗結果證實,在滿載的情況下,效率可達96%以上、功率因數可達0.98以上,而且都能符合IEC61000-3-2電流各次諧波規範。由以上結果驗證設計與實驗的正確性。
The objective of this thesis is to develop and implement a digital controlled 1kW interleaved boost converter with power factor corrector. The specifications are as follows: input voltage = and output voltage = 390V. Two MOSFETs are controlled with 180 degrees out of phase to provide interleaved on and off operation. Therefore, the input current ripple and output voltage ripple can be reduced and thereby improving the volume and current rating of power devices. Moreover, the input current can track its input voltage while regulate the output voltage. The controller consists of inner and outer loops. The inner loop is controlled using average current mode control to force the current following sinusoidal input voltage to achieve power factor correction purposes. And the outer loop is with voltage mode to control the DC-link voltage. Current sharing between two phase inductor currents with CCM is achieved by a simple current sharing control. Experimental results show that the efficiency is up to 96%, power factor is greater than 0.98 under full load conditions. These results meet the standard of IEC61000-3-2 harmonic current specifications and thereby confirming the design and implementation.