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分别采用功率匹配的方法和等效电流源的方法，对含功率因数校正（ Ｐ Ｆ Ｃ） 环节的单位功率因数单相开关变换器的输出电压纹波进行了深入分析，得出对各种拓扑结构的单位功率因数单相开关变换器和各种控制方法均适用的统一表达式。结果表明：单位功率因数单相开关变换器的输出电压纹波取决于输出电流和输出滤波电容的大小，而与所采用的控制方式无关。
The method of power matching and the method of equivalent current source are respectively used to analyze the output voltage ripple of single-phase switching power converter with power factor correction (P F C) The unity of the unit power factor single-phase switching converter and control methods are applicable to a unified expression. The results show that the output voltage ripple of single-phase switching power factor converter depends on the output current and the output filter capacitor size, but has nothing to do with the control method adopted.