NDLI: Efficient method to investigate the equivalent series resistance of a capacitor in low frequency range

Content Provider	IET Digital Library
Author	Zhang, Hanlu Huang, Qiongdan Wang, Honggang Shi, Xinke
Abstract	The equivalent series resistance (ESR) is an important parameter for determining the quality of a capacitor. In general, the value of the ESR can be obtained only at a single frequency point during mass production testing, because obtaining the whole ESR curve by means of scanning the frequency range is time consuming. We present a novel method to investigate how the ESR varies with frequency during batch testing. We use the multi-frequency synthesis excitation waveform to obtain the ESR at multiple frequency points. This allows the entire ESR curve to be obtained during one measurement period, thus greatly improving the measurement speed. The mathematical principle, the circuit realisation and the signal processing algorithm are discussed. Furthermore, a principle verification test is conducted, and the ESR values at seven frequency points are synchronously measured. The obtained results are consistent with those acquired from a standard LCR meter, and the entire measurement is completed within 10 ms, which confirms that our method is efficient and suitable for measurements in the mass production testing.
Starting Page	494
Ending Page	498
Page Count	5
ISSN	17518822
Volume Number	14
e-ISSN	17518830
Issue Number	Issue 4, Jun (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/14/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2019.0131
Journal	IET Science, Measurement & Technology
Publisher Date	2020-01-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Batch Testing Capacitance Measurement Capacitor Electrolytic Capacitor Entire ESR Curve Entire Measurement Equivalent Series Resistance ESR Value Impedance And Admittance Measurement Low Frequency Range Mass Production Testing Moisture Measurement Multifrequency Synthesis Excitation Waveform Multiple Frequency Point Principle Verification Test Sensing Device And Transducers Seven Frequency Point Signal Processing Single Frequency Point Time 10.0 Ms
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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