Title :
Analysis of ripple current of an electrolytic capacitor in power factor controller
Author :
Kurachi, Toshiaki ; Shoyama, Masahito ; Ninomiya, Tamotsu
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
Abstract :
A large electrolytic capacitor is usually used at the output terminal of power factor control circuits to suppress the high-frequency switching ripple voltage as well as the low-frequency ripple voltage. Due to the equivalent series resistance of the electrolytic capacitor, the capacitor current causes a power loss which increases its temperature and may shorten its life time. It is important therefore to estimate the effective value of the capacitor current accurately. This paper presents a detailed analysis of the ripple current of an electrolytic capacitor in a boost-type power factor control circuit. The ripple current is divided into two components, namely the low-frequency and the high-frequency components. The root-mean-square value of the capacitor current is derived for both components. The analytical results are confirmed by experiments
Keywords :
AC-DC power convertors; electrolytic capacitors; equivalent circuits; harmonic analysis; network analysis; power capacitors; power factor correction; power system harmonics; switching circuits; AC/DC power conversion; boost-type circuit; capacitor current estimation; electrolytic capacitor; equivalent series resistance; high-frequency switching ripple voltage; life time; low-frequency ripple voltage; power factor controller; power loss; root-mean-square; temperature; Harmonic analysis; Paramagnetic resonance; Power capacitors; Power generation; Reactive power; Switched capacitor circuits; Switching circuits; Switching frequency; Temperature; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 1995., Proceedings of 1995 International Conference on
Print_ISBN :
0-7803-2423-4
DOI :
10.1109/PEDS.1995.404949
