EPE  Vol.5 No.4 B , July 2013
A Study on the Conducted Interference of Capacitor Charging Power Supply
Abstract: In this paper, a mathematical analysis of the EMI (Electromagnetic Interference) for a 20 kHz/10 kV capacitor charging power supply in frequency-domain is presented, and a related circuit model considering the transient switching interference is proposed. Due to the high working frequency and the device-switching transitions, the conducted EMI caused by the charging circuit which includes the harmonics of grid frequency, working frequency and device-switching transition frequencies. Thus under certain working situations or loads parallel power supply, the interference may cause charging failure. To solve this problem, a high frequency transformer modeled with stray capacitances and an approximation of the device-switching transition is applied in the Spice-based simulation model, and a mathematical analysis in frequency-domain is presented.
Cite this paper: X. Han, Y. Gao, Y. Sun and P. Yan, "A Study on the Conducted Interference of Capacitor Charging Power Supply," Energy and Power Engineering, Vol. 5 No. 4, 2013, pp. 1134-1138. doi: 10.4236/epe.2013.54B216.

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