Please use this identifier to cite or link to this item: https://dspace.ctu.edu.vn/jspui/handle/123456789/5308
Title: Fault Diagnosis of DC-Link Capacitors in Three-Phase AC/DC PWM Converters by Online Estimation of Equivalent Series Resistance
Authors: Pu, Xing-Si
Nguyễn, Thanh Hải
Lee, Dong-Choon
Kim, Jang-Mok
Lee, Kyo-Beum
Keywords: AC/DC pulsewidth-modulation (PWM) convert-ers
Current measurement
Dc-link capacitor
Equivalent series re-sistance (ESR)
Estimation
Fault diagnosis
Monitoring
recursive least squares (RLS)
Temperature sensing
Issue Date: 2013
Series/Report no.: Industrial Electronics, IEEE Transactions on;60 .- p.4118-4127
Abstract: In this paper, a novel scheme for the estimation of the equivalent series resistance (ESR) of the dc-link electrolytic capacitor in three-phase ac/dc pulsewidth-modulation converters is proposed for condition monitoring. First, a controlled ac current component is injected into the input. Then, it induces ac voltage ripples on the dc output. By manipulating these ac voltage and current components with digital filters, the value of the ESR can be calculated, where the recursive least squares algorithm is used for reliable estimation results. In addition, the value of the ESR is corrected by considering the temperature effect, for which a simple temperature-sensing circuit has been designed. The simulation and experimental results show that the estimation error of the ESR is within a reasonable range, thereby enabling the determination of the appropriate time for the replacement of the capacitor.
URI: http://localhost:8080//jspui/handle/123456789/5308
Appears in Collections:Tạp chí quốc tế

Files in This Item:
File Description SizeFormat 
_file_2.86 MBAdobe PDFView/Open
Your IP: 18.227.46.54


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.