Online equivalent series resistance estimation method for condition monitoring of DC-link capacitors

Online equivalent series resistance estimation method for condition monitoring of DC-link capacitors

In this paper, a cost-effective and reliable equivalent series resistance (ESR) estimation method for aluminium electrolytic capacitors used as DC-link capacitors in front-end rectifier fed inverters is proposed. The proposed method is based on the extraction of switching frequency components of DC-...

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Bibliographic Details
Main Authors: Sundararajan Prasanth, Mohamed Halick Mohamed Sathik, Firman Sasongko, Tan, Chuan Seng, Mohd Tariq, Rejeki Simanjorang
Other Authors: School of Electrical and Electronic Engineering
Format: Conference or Workshop Item
Language:English
Published: 2018
Subjects:
Band-pass Filters
ESR Estimation
Online Access:https://hdl.handle.net/10356/88594
http://hdl.handle.net/10220/44698
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Institution: Nanyang Technological University
Language: English
Description
Summary:In this paper, a cost-effective and reliable equivalent series resistance (ESR) estimation method for aluminium electrolytic capacitors used as DC-link capacitors in front-end rectifier fed inverters is proposed. The proposed method is based on the extraction of switching frequency components of DC-link voltage and current using band-pass filters. A limiting value of switching frequency is identified, below which a new solution is proposed to achieve higher accuracy compared to the similar methods using band-pass filters. The proposed method is verified by both simulation and experimental results and it is shown that the estimation error is very low so that this method can be used for condition monitoring of DC-link capacitors.

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