Issue |
JNWPU
Volume 37, Number 3, June 2019
|
|
---|---|---|
Page(s) | 594 - 600 | |
DOI | https://doi.org/10.1051/jnwpu/20193730594 | |
Published online | 20 September 2019 |
A Design of Online Fault Diagnosis System Based on ESR for Electrolytic Capacitors
基于ESR的电解电容器在线故障诊断系统设计
1
School of Automation, Central South University, Changsha 410075, China
2
School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China
3
Unique Railway Transport Technology Co., Ltd, Changchun 130000, China
Received:
21
May
2018
ESR(Equivalent Series Resistance) is one of the important indicators for evaluating health status of electrolytic capacitors. Due to the structural specificity of the electrolytic capacitors, ESR is difficult to measure directly. In order to monitor the health status of the electrolytic capacitor in real time, an equivalent model for the electrolytic capacitor is established. The ESR frequency characteristics and temperature characteristics are analyzed and tested. The method of online fault diagnosis by evaluating the health status of the electrolytic capacitor with online calculation of ESR is proposed. Comparing the calculated value of ESR real-time with the initial value, when the former increases to a certain threshold value with respect to the latter under the same working condition, the electrolytic capacitor can be considered as failed, and the observer can perform replacement processing according to this mechanism in time. Finally, the effectiveness of the method was verified by using the dSPACE semi-physical experimental platform.
摘要
ESR(等效串联电阻)是评估电解电容器健康状态的重要指标之一,而由于电解电容器结构特殊性,ESR值很难直接测量。为了实时监测电解电容器的健康状态,建立了电解电容器等效模型,分析并测试了ESR频率特性与温度特性,提出一种通过在线计算ESR评估电解电容器健康状态以实现在线故障诊断的方法。该方法将ESR实时计算值和初始值作比较,在同等工作条件下当前者相对于后者增加至一定数值时,可认为该电解电容器已失效,观测者可根据此机理及时进行更换处理。最后通过dSPACE半实物实验平台对新方法的有效性进行了实验验证。
Key words: electrolytic capacitor / equivalent series resistance(ESR) / online / fault diagnosis
关键字 : 电解电容器 / 等效串联电阻(ESR) / 在线 / 故障诊断
© 2019 Journal of Northwestern Polytechnical University. All rights reserved.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.