基于精密整流電路的無橋PFC的研究

摘要：本文研究了無橋Boost PFC電路，由于省略了整流橋，效率比傳統(tǒng)的Boost PFC高，但是由于其電感的特殊位置，給電感電流信號檢測帶來了困難，本文提出了一種基于精密整流電路的新型電流檢測，并研制了一臺300W的原理樣機，通過實驗驗證理論分析的正確性。 敘詞：功率因數(shù)校正；雙Boost PFC；精密整流電路 Abstract：paper focuses on Dual Boost PFC(DBPFC), it shows higher efficiency compared with traditional Boost PFC, but it is not very easy for current sensing because of the inductors location.A new current sensing is proposed in thi paper to solve this problem.Finally a 300W prototype is designed.Experimental results verify the correctness of the theoretical analysis. Keyword：power factor correction;Dual Boost PFC(DBPFC);exact rectifying