Journal ArticleDOI
Use of ESR for deterioration diagnosis of electrolytic capacitor
TLDR
In this article, a new deterioration diagnosis method for the electrolytic capacitor is proposed for a forward-type converter and a buck-boost converter, which is valid for any load condition, no matter whether the circuit has feedback control.Abstract:
A new deterioration diagnosis method for the electrolytic capacitor is proposed for a forward-type converter and a buck-boost converter. It was observed that the ESR (equivalent series resistance) of the electrolytic capacitor increases as it deteriorates, and the knowledge that ripple varies proportionally to the ESR increase was used. With this method, the electrolytic capacitor life-cycle aging rate can be projected for the active circuit over the system life. This approach to deterioration is valid for any load condition, no matter whether the circuit has feedback control or not. >read more
Citations
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Journal ArticleDOI
Reliability of Capacitors for DC-Link Applications in Power Electronic Converters—An Overview
Huai Wang,Frede Blaabjerg +1 more
TL;DR: This review serves to provide a clear picture of the state-of-the-art research in this area and to identify the corresponding challenges and future research directions for capacitors and their dc-link applications.
Journal ArticleDOI
Failure prediction of electrolytic capacitors during operation of a switchmode power supply
TL;DR: In this paper, a new method to set a predictive maintenance is presented and tested on two types of converters, i.e., sound electrolytic filter capacitors and a reference system including all the converter parameters was built for the converter at its sound state, and the lifetime of these capacitors was computed.
Journal ArticleDOI
Life-Cycle Monitoring and Voltage-Managing Unit for DC-Link Electrolytic Capacitors in PWM Converters
TL;DR: In this paper, a low-cost microcontroller for dc-link electrolytic capacitors in pulsewidth modulation converters is presented, which performs online identification of the capacitor's equivalent series resistance (ESR) to detect the life-cycle status and permit preventive maintenance.
Journal ArticleDOI
A Real-Time Predictive-Maintenance System of Aluminum Electrolytic Capacitors Used in Uninterrupted Power Supplies
TL;DR: In this paper, a low-cost method to realize a real-time condition monitoring and a predictive maintenance system of an electrolytic capacitor used in uninterruptible power supplies (UPSs) is presented.
Journal ArticleDOI
Fault Diagnosis of DC-Link Capacitors in Three-Phase AC/DC PWM Converters by Online Estimation of Equivalent Series Resistance
TL;DR: 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, where the recursive least squares algorithm is used for reliable estimation results.
References
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Proceedings ArticleDOI
Deterioration diagnosis of electrolytic capacitor in a buck-boost converter
Harada Kousuke,A. Katsuki +1 more
TL;DR: In this article, a method for diagnosing the deterioration of an electrolytic capacitor with a finite life span used in the active circuit of a buck-boost converter is proposed based on the fact that the equivalent series resistance (ESR) of the electrolytic capacitance increases as it deteriorates, which causes an increased ripple in direct proportion to the ESR.