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AC DC（三）：PFC_pfc电路-CSDN博客 PFC （P ower F actor C orrection），又称功率因数校正，指的是有效功率与视在功率（总耗电量）之间的比值。 PFC主要是对输入电流波形进行控制，使其与输入电压波形同步，功率因数可以衡量电力被有效利用的程度，值越大，利用率越高。
Power Factor Correction (PFC) Circuit Basics for CN A power factor correction (PFC) circuit intentionally shapes the input current to be in phase with the instantaneous line voltage and minimizes the total apparent power consumed While this is advantageous to utility companies, a PFC circuit also provides benefits in end applications