The results obtained show that the passive approach described here can comply with the required specifications if a proper inductor value of the filter is selected.
结果表明，如果设计适当的滤波电感值，本文所述的无源功率因数校正方法可以满足标准所要求的规定。
In the low frequency range (1 Hz to 1 MHz), however, the inductor value becomes very large and the inductor itself gets quite bulky, economical production difficult.
然而，在低频范围(1hz至1mhz)中，电感器值变得非常大，并且电感器本身变得非常庞大，经济的生产困难。
By analyzing the current ripple of the inductor and voltage stress of switches at the same conditions, the reduced value of the current ripple and voltage stress with three-level topology can be got.
通过三电平拓扑和传统两电平拓扑电路的对比分析，得出了相同先决条件下这两种拓扑中开关管电压应力和电感电流可减小的幅度。
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