Capacitor ESR measurement technique

Dolan, J.E.; Bolton, H.R.

doi:10.1109/ppc.1991.733274

Cited by 4 publications

(8 citation statements)

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“…The ESR estimation method proposed in [15] for boost converter uses the rms value of switching frequency components extracted using BPF to estimate the ESR. The ESR estimation method proposed in [15] and similar methods using (10) is based on the condition that the capacitive reactance "X C " is very small compared to the ESR. If that condition fails, the presence of appreciable capacitive reactance will increase the total impedance and introduce error in the ESR estimation.…”

Section: Esr Estimation Methodsmentioning

confidence: 99%

“…Therefore, the method proposed in [15] cannot be used. The theoretical condition to estimate the ESR using (10) with error less than 5% is derived and presented in ( 11)-( 14). The estimation error less than 5% can be achieved using (10), only if the total impedance is not greater than the ESR by 5%.…”

Section: Esr Estimation Methodsmentioning

confidence: 99%

“…Therefore, using (10) or the method proposed in [15] for the ESR estimation requires the following conditions to be satisfied 1) Inductive reactance due to the ESL is negligible at the frequency in which the ESR is estimated. 2) Capacitive reactance is negligible, which can be ensured by using (14).…”

Section: Esr Estimation Methodsmentioning

confidence: 99%

“…Several methods have been proposed in the literature regarding the estimation of ESR and capacitance, which can be categorized into online and offlin methods. In offlin methods, the system operation must be interrupted to disconnect the capacitor to measure the required parameters [10], [11]. Therefore, these methods cannot be applied to industrial power converters where the interruption of system operation and disconnection of the capacitor are not favored.…”

Section: Introductionmentioning

confidence: 99%

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Online Condition Monitoring System for DC-Link Capacitor in Industrial Power Converters

Sundararajan

Sathik

Sasongko

et al. 2018

IEEE Trans. on Ind. Applicat.

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This paper proposes an online condition monitoring system for aluminum electrolytic capacitors used as dc-link capacitors in industrial power converters. Electrolytic capacitors are one of the most fragile components of a power converter system because of their wear-out failures and short lifespan. Therefore, the use of condition monitoring systems for aluminum electrolytic capacitors allow preventive maintenance to be performed, thereby avoiding unexpected shutdown and downtime. The dominant wear-out mechanisms in aluminum electrolytic capacitors are characterized by the increase in equivalent series resistance. Hence, the condition monitoring system proposed in this paper is based on the online estimation of the capacitor's equivalent series resistance using the switching frequency components of the dc-link capacitor voltage and current. The equivalent series resistance estimation method is tested using the PSpice circuit simulator and is validated experimentally using a custom-made inverter. Finally, the equivalent series resistance estimation method is adapted for the condition monitoring of capacitors in industrial power converters and the proposed condition monitoring system is implemented in a commercial ac drive system to prove the applicability of the proposed method to industrial power converters.

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Section: Esr Estimation Methodsmentioning

confidence: 99%

Section: Esr Estimation Methodsmentioning

confidence: 99%

Section: Esr Estimation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Online Condition Monitoring System for DC-Link Capacitor in Industrial Power Converters

Sundararajan

Sathik

Sasongko

et al. 2018

IEEE Trans. on Ind. Applicat.

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“…Offline methods require the capacitor to be disconnected from the system to measure the parameters using a LCR meter or other simple measurement techniques. Several offline parameter estimation methods are proposed in [5] ̶ [7]. The need to disconnect the capacitor makes the offline methods inconvenient for many applications.…”

Section: Introductionmentioning

confidence: 99%

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

Sundararajan

Sathik

Sasongko

et al. 2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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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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Review of Passive Components and a Case Study in PC Board Layout

Thompson¹

2008

Analog Circuits

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Capacitor ESR measurement technique

Cited by 4 publications

References 1 publication

Online Condition Monitoring System for DC-Link Capacitor in Industrial Power Converters

Online Condition Monitoring System for DC-Link Capacitor in Industrial Power Converters

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

Review of Passive Components and a Case Study in PC Board Layout

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