【摘要】 以临界导通模式(BCM)Boost PFC变换器为研究对象,分析了输入电流的过零畸变现象,并得到了输入电流时域模型以及该模型下功率因数的数字分析方法。制作了一台200W的PFC样机。实验结果显示,基于此数字化功率因数分析方法计算出来的结果和利用功率分析仪测出来的功率因数的相对误差在1%以内。更多还原

【Abstract】 The Boost PFC converter in Boundary Conduction Mode (BCM) was chosen as the study subject. Through analysis of zero crossing distortion of the input current, time domain model of the input current and corresponding digital method of power factor analysis were derived. A 200 watts PFC prototype was built. Experimental results show that the relative error between the calculated value of this method and the tested value of the power analyzer is below one percentage.更多还原