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The sensitivity of a method to predict a capacitor's frequency characteristic

S. Avramov-Zamurovic, A.D. Koffman, N.M. Oldham, B.C. Waltrip
2000 IEEE Transactions on Instrumentation and Measurement  
The method depends on network analyzer impedance measurements at high frequencies (40 MH-200 MHz) and a regression of these measurements down to the frequency range of 10 MHz-1 kHz.  ...  Naval Academy and the National Institute of Standard and Technology (NIST) resulted in the development of a method to characterize the capacitance and dissipation factor of a set of commercial standard  ...  ACKNOWLEDGMENT The authors wish to thank K. Yokoi, Hewlett-Packard Japan, the original developer of the CFCP measurement system, for his assistance during this project, and T.  ... 
doi:10.1109/19.843085 fatcat:laapnmkucrfsnayb6qeaq6hxmu

The sensitivity of a method to predict a capacitor's frequency characteristic

S. Avramov-Zamurovic, A.D. Koffman, N.M. Oldham, B.C. Waltrip
IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309)  
The method depends on network analyzer impedance measurements at high frequencies (40 MH-200 MHz) and a regression of these measurements down to the frequency range of 10 MHz-1 kHz.  ...  Naval Academy and the National Institute of Standard and Technology (NIST) resulted in the development of a method to characterize the capacitance and dissipation factor of a set of commercial standard  ...  ACKNOWLEDGMENT The authors wish to thank K. Yokoi, Hewlett-Packard Japan, the original developer of the CFCP measurement system, for his assistance during this project, and T.  ... 
doi:10.1109/imtc.1999.776136 fatcat:svdvmoblpff7bl5rgt4h6oggbq

An on-line capacitor state identification method based on improved RLS

Shu Cheng, Chang Liu, Shengxian Xue, Maoyu Wang, Xun Wu, Yu Luo
2021 Transportation Safety and Environment  
Aiming at the shortcomings of existing methods, such as low dynamic sensitivity of data update and fluctuation of identification results, a capacitor state identification method based on improved RLS is  ...  Finally, we successfully verified the accuracy, robustness, and adaptability of the proposed method by a series of experimental tests on a dSPACE platform.  ...  Acknowledgement Project fund No: Natural Science Foundation of Hunan Province (2020JJ5757).  ... 
doi:10.1093/tse/tdab007 fatcat:ku4kvlfh2jhhpeciqsj6ivdwzm

A Vibration-Based MEMS Piezoelectric Energy Harvester and Power Conditioning Circuit

Hua Yu, Jielin Zhou, Licheng Deng, Zhiyu Wen
2014 Sensors  
A complete design flow of the vibration-based energy harvester using the finite element method (FEM) is proposed.  ...  The modal analysis is selected to calculate the resonant frequency of the harvester, and harmonic analysis is performed to investigate the influence of the geometric parameters on the output voltage.  ...  Jielin Zhou performed the analysis of PEH, conducted the FEM simulations, measured the characteristics of the MEMS PEH, and co-wrote the manuscript.  ... 
doi:10.3390/s140203323 pmid:24556670 pmcid:PMC3958224 fatcat:n43buxneabfxxd5agstbuh3wey

Wideband mechanical amplifiers for ``dual'' gw detectors

M Bignotto, the Dual collaboration
2006 Journal of Physics, Conference Series  
We report on the status of the R & D towards a dual detector.  ...  We discuss the experimental advances for a broadband mechanical amplifier equipped with a Fabry-Perot cavity and for an increase of the breakdown voltage in capacitive transducers.  ...  The predicted SQL sensitivity of LIGO advanced is also shown.  ... 
doi:10.1088/1742-6596/32/1/034 fatcat:w2yjqumagnexvowwj534fozfoe

Impact of Input Voltage Sag and Unbalance on DC-Link Inductor and Capacitor Stress in Adjustable-Speed Drives

Kevin Lee, Thomas M. Jahns, Thomas A. Lipo, Giri Venkataramanan, William E. Berkopec
2008 IEEE transactions on industry applications  
Simulations and experimental tests are used to verify the accuracy of predictions provided by closed-form analysis and simulation for a 5 hp ASD system.  ...  It is shown that the effects of voltage unbalances and sags on the dc link capacitor lifetime will be the same when either line inductors or a dc link choke inductor are used if the dc choke inductance  ...  It is important to recognize that the capacitor's ESR rises significantly at low frequencies so that the capacitor losses are particularly sensitive to the low-order rectifier ripple current frequency  ... 
doi:10.1109/tia.2008.2006308 fatcat:3yk5sqw4xbcm7cqnbnllvhxc3e

Towards a Dependable Cardiovascular Surveillance System [chapter]

Cristina C. Oliveira, José Machado da Silva
2014 International Federation for Medical and Biological Engineering Proceedings  
The monitoring system uses an inductive coupling interface to capture the pressures given by a cluster of sensors placed on the stent-graft's wall.  ...  However, in spite of major advances in the surgical techniques, complications are still likely to occur making it recommendable to maintain lifelong surveillance.  ...  ACKNOWLEDGEMENTS The authors acknowledge the support of the ERDF -European Regional Development Fund through the COMPETE Programme (operational programme for competitiveness) and National Funds through  ... 
doi:10.1007/978-3-319-03005-0_30 fatcat:dqxzq2cx5bglpdl2by5moyijwi

Health Monitoring of DC link Capacitors

M. Makdessi, A. Sari, P. Venet
2013 Chemical Engineering Transactions  
MPPF are a good alternative to electrolytic capacitors thanks to their high dielectric breakdown strengths, low dissipation factors and good stability over a wide range of frequencies and temperatures.  ...  This paper presents an approach for the monitoring of the capacitor's electrical parameters in function of the ageing time when used as DC-link capacitors.  ...  Accelerated Ageing tests Accelerated ageing tests methods are often used as a way to assess the effects of the degradation process through time.  ... 
doi:10.3303/cet1333185 doaj:4c83a713ef254b979f6ab799fffb733c fatcat:y2ctetbqqjdhzoia673caf6xn4

Nonlinear Dielectric Relaxation in Solutions of 6CHBT in Nonpolar Medium

P. Kędziora, J. Jadżyn, L. Hellemans
1999 Zeitschrift fur Naturforschung A-A Journal of Physical Sciences  
The frequency dependence of the nonlinear dielectric increment was studied for benzene solutions of the nematogenic molecule 4-(trans-4'-n-hexylcyclohexyl)isothiocyanatobenzene (C  ...  Acknowledgement This work was supported by the Fonds voor Wetenschappelijk Onderzoek -Vlaanderen, Belgium, in the framework of the agreement for scientific cooperation with the Polish Academy of Sciences  ...  However, the problem is worth the effort because the nonlinear dielectric spectroscopy, due to its exceptional sensitivity to the aggregation processes in liquids, is a unique method of detecting the intermolecular  ... 
doi:10.1515/zna-1999-10-1105 fatcat:oxucilluqvf4tp3nlxi7oz55ji

Modeling of a carbon nanotube ultracapacitor

Antonis Orphanou, Toshishige Yamada, Cary Y Yang
2012 Nanotechnology  
Using a molecular dynamics (MD) approach, the equilibrium positions of the electrode charges interacting through the Coulomb potential are determined, which in turn yield the equipotential surface and  ...  The modeling of carbon nanotube ultracapacitor (CNU) performance based on the simulation of electrolyte ion motion between the cathode and the anode is described.  ...  At higher OCVs, the electrolyte ions tend to maintain a close proximity to the electrodes, thus creating a larger DLC, which is less sensitive to frequency variations as shown in figure 1 .  ... 
doi:10.1088/0957-4484/23/9/095401 pmid:22322202 fatcat:il4pvdadubhetdtzcgljs7o65e

Analysis of DC-Link Current Influence on Temperature Variation of Capacitor in a Wind Turbine Application

Young jong Ko, Holger Jedtberg, Giampaolo Buticchi, Marco Liserre
2018 IEEE transactions on power electronics  
The experimental results confirm that the proposed power converter enables us to derive the correlation between the current frequency and the temperature variation of capacitor.  ...  This paper analyzes the actual current profile in the dc-link capacitor of a back-to-back converter for wind turbine application.  ...  part due to the characteristics of the employed electrolyte [17] , [28] .  ... 
doi:10.1109/tpel.2017.2704293 fatcat:wuqx25nb2jfrhazzuqjy77qdem

Modeling the Double Layer Capacitance Effect in Electrolyte Gated FETs with Gel and Aqueous Electrolytes

Roslyn S. Massey, Ravi Prakash
2021 Micromachines  
Our method predicts the input/output electrical behavior of bio-gel EDLC and EGOFET devices far more accurately than conventional DLC techniques, with less than 5% error.  ...  The effective reproduction of the transient response of the OEGFET equivalent system also predicts the transient capacitive effects observed in our previously reported label-free OEGFET biosensor devices  ...  The work acknowledges the financial support from the Natural Sciences and Engineering Research Council (NSERC) of Canada. Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/mi12121569 pmid:34945419 pmcid:PMC8704607 fatcat:np4vako6fff6feukgzvik5z3ca

Serum RANKL levels and bioelectric impedance assessments in knee osteoarthritis patients

Elif PALA, Tuba DENKÇEKEN, Türkan TURGAY
2020 Journal of Surgery and Medicine  
Conclusion: The phase angle values at 50 kHz and RANKL levels may not be used in predictive detection of knee OA.  ...  Concerning the RANKL levels, although it shows a relative increase in the study group, it did not reach a significant level (P=0.116).  ...  Therefore, it is necessary to explore quantitative and sensitive methods for the examination of this disease.  ... 
doi:10.28982/josam.697686 fatcat:yj5fwpvl6fhsrnwwfaqkacsm3m

Modeling and Simulation of the Flyback Converter using SPICE Model

2019 International journal of recent technology and engineering  
This paper presents to find a sufficient model of integrated passive structures for high frequency analysis and prediction in power electronic circuits.  ...  At high frequencies there are many parasitic oscillations that begin to circulate in the power circuits.  ...  The DC bus capacitor's function is to sink into the ground some high frequency content appearing at a node which is to hold constant (DC).  ... 
doi:10.35940/ijrte.c4109.098319 fatcat:nrtr5rovqjccnfnoqexaqoaiga

A capacitive sensor for non-contact nanoliter droplet detection

A. Ernst, W. Streule, N. Schmitt, R. Zengerle, P. Koltay
2009 Sensors and Actuators A-Physical  
Therefore, the calibrated sensor is able to determine the volume of dispensed droplets in the range from 20 to 65 nl with a resolution of less than 2 nl.  ...  In addition, the sensor signal is sensitive to the droplet's volume V, dielectric constant ε r (epsilon) and velocity v.  ...  Acknowledgment The Authors are thankful to BioFluidix GmbH for the provision of the PipeJet TM dispenser and the necessary dispenser equipment and know how.  ... 
doi:10.1016/j.sna.2009.04.023 fatcat:iinhqjeutzc7bh66tym4ng5dfy
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