power factor correction短语¹⁴⁴⁹⁷²⁺² 基本例句 功率因子校正 Passive Power factor correction circuit, two-stage and single-stage APFC circuits are researched, which applications are given by comparison of their performance. 对无源 PFC电路、有源两级 PFC 电路和有源单级 PFC电路进行了分析及性能比较，指出它们分别适用的场合。 iciba