期刊名称：Carptahian Journal of Electronic and Computer Engineering
印刷版ISSN：1844-9689
电子版ISSN：2343-8908
出版年度：2012
卷号：5
期号：1
页码：8
语种：English
出版社：UT Press Publishing House, Technical University of ClujNapoca, Romania
摘要：The main goal of this paper is to present some experimental results regarding power factor (PF) and current total harmonic distortions (THDi) of some very common loads on low voltage a.c. lines i.e. the power supply of computers, monitors and TV sets. The causes of some unexpected values are investigated and some physically meaningful explanations are delivered. The impact of the output current value on PF is emphasized thus proving that one single PF value cannot fully qualify a SMPS. It is also proven that harmonic analysis based THDi values may be very misleading if inter-harmonic components are neglected. Finally an old concept, of renewed interest, the dependency of THDi on PF is revisited.
