提高日光灯电路的功率因数为什么要用并联电容器而不用串联 在日光灯电路中,并联一个适当的电容后,会不会提高功率因数?为...

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因为日光灯电路中有电感,并联电容可以提高功率因数.而串联电容会改变日光灯的工作电压可能使日光灯无法点亮.

串联电容提高功率因数会导致电源输出的电流变大,增加了输电线上的损耗,而并联电容会降低电源输出的无功电流成分,降低了输电线上的损耗,所以从输电损耗角度考虑,并联电容更合适。

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