Inductive and capacitive means is a phase relationship between voltage and current in the circuit, the inductive current is the voltage phase advance, capacitive means voltage phase lagging current, the same load is purely resistive circuit phase voltage and current.
LC series resonant circuit, the frequency w> F resonance frequency, capacitance wc> inductive reactance 1 / wL, more capacitive division, the impedance is capacitive, inductive and vice versa more partial pressure, the impedance is inductive.
LC parallel resonant circuit, the frequency w> F resonance frequency, the inductive reactance 1 / wL <capacitance wc, more shunt inductance, the impedance is inductive, and vice versa more shunt capacitors, the impedance is capacitive.
Of PFC (Power Factor Correction) power factor correction.
ATX power supply passive PFC (usually a larger inductance) is to increase the inductive element in the circuit, the phase difference to a fundamental wave voltage and current of the AC input power factor is reduced to increase the inductance by a compensation method. Passive PFC low power factor, heat.
Reproduced in: https: //www.jianshu.com/p/c3379273c557