主要介绍了有源功率因数校正（APFC）的工作原理、电路分类。
Principle and class of active power factor correction(APFC) are introduced.
文中详细分析了电感电流准连续模式的有源功率因数预校正电路的工作原理。
The principle of active power factor correction circuit operated in critical inductor current mode is analyzed in this paper in detail.
介绍用于无源和有源功率因数校正中电感材料的特性和选择。
The characteristic and selection of inductance material for use in PPFC and APFC are introduced.
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