High frequency impedance characteristics of a tunable microplasma device

2021 ◽  
Vol 129 (15) ◽  
pp. 153301
Author(s):  
Saurav Gautam ◽  
Gabriele Morra ◽  
Ayyaswamy Venkattraman
Keyword(s):  
High Frequency ◽  
Impedance Characteristics

Partial Impedance Spectroscopy Tests of a 6 kW Proton Exchange Membrane Water Electrolyzer Stack

2010 ◽  
Author(s):  
Taehee Han ◽  
Hossein Salehfar ◽  
Nilesh V. Dale ◽  
Mike D. Mann ◽  
Jivan N. Thakare
Keyword(s):  
High Frequency ◽  
Proton Exchange Membrane ◽  
Low Frequency ◽  
Proton Exchange ◽  
Operating Conditions ◽  
Frequency Range ◽  
Impedance Characteristics ◽  
Pem Electrolyzer ◽  
Exchange Membrane ◽  
Partial Current

Impedance characteristics of a 6 kW proton exchange membrane (PEM) electrolyzer stack are presented under various operating conditions. An electrolyzer stack was operated under room temperature and partial current range (0 to 80 A). The whole stack impedance spectrums were measured by three different power supply configurations. The total sweeping frequency range (0.5 Hz to 20 kHz) is divided into low frequency (0.5 to 20 Hz), middle frequency (20 Hz to 1 kHz), and high frequency (1 to 20 kHz). Each frequency range required a different measurement setup to measure the whole stack impedance data. In this study, the partial impedance spectrums at low and high frequency ranges are successfully measured and analyzed. The measured data is verified with Kramers-Kronig relations. Measurement issues at the middle frequency region are discussed.

scholarly journals Basic Study of High-Frequency Impedance Characteristics of Ground System

2008 ◽  
Vol 128 (11) ◽  
pp. 1239-1245 ◽  
Author(s):  
Takashi Tsuchida ◽  
Masaki Tsuneoka ◽  
Yoshinao Ohkawa ◽  
Yuuta Nakajima
Keyword(s):  
High Frequency ◽  
Basic Study ◽  
Impedance Characteristics ◽  
Ground System

Plasma Impedance Characteristics of Radio Frequency and Very High-Frequency Magnetron Discharges

2020 ◽  
Vol 48 (1) ◽  
pp. 99-103
Author(s):  
Xiyue Liu ◽  
Chao Ye ◽  
Xiangying Wang ◽  
Su Zhang ◽  
Min Zhu ◽  
...  
Keyword(s):  
Radio Frequency ◽  
High Frequency ◽  
Very High Frequency ◽  
Impedance Characteristics ◽  
Plasma Impedance ◽  
Very High

scholarly journals Modeling and Simulation of the Flyback Converter using SPICE Model

2019 ◽  
Vol 8 (3) ◽  
pp. 946-952
Keyword(s):  
High Frequency ◽  
Ground Plane ◽  
Power Electronic ◽  
Passive Components ◽  
High Frequencies ◽  
Flyback Converter ◽  
Spice Model ◽  
Impedance Characteristics ◽  
Power Electronic Circuits ◽  
Parasitic Impedance

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. Some sources of these oscillations include inter-component connections and their environment begin having electromagnetic significance, unmodeled characteristics in the semiconductor devices, Parasitic impedance characteristics of discrete passive components, Interference from an imperfect source and a ground plane and Interference from radiation. A simulation model involving most of these factors can prove valuable in distinguishing between the causes of parasitic oscillations. A designer can modify the parameters of a particular parasitic element, and observe its effect on the oscillations, hence seeing which factors are the most significant.

Suppression of High-Frequency Interference in Signal Loop

2015 ◽  
Vol 713-715 ◽  
pp. 1081-1085
Author(s):  
Guan Qun Zhao ◽  
Ze Zhong Wang ◽  
Bo Dong ◽  
Li Li Zhao ◽  
Ke Wang
Keyword(s):  
High Frequency ◽  
Inhibitory Effect ◽  
Experimental Results ◽  
Scheduling System ◽  
Important Index ◽  
Impedance Characteristics ◽  
Zn Ferrite ◽  
Before And After ◽  
Ferrite Ring

With the deep and promotion of unattended work in substations, the correct rate of remote signal becomes an important index in automation scheduling system. For remote signal false caused by high-frequency interferences in substation, we propose the use of Ni-Zn ferrite ring to suppress high-frequency interferences. The frequency-impedance characteristics of ferrite ring with different turns are tested. And the inhibitory effect of ferrite ring on interferences below and above 100MHz is measured separately. We installed ferrite rings in remote signal loops, and compared the voltage waveforms before and after installation. Experimental results provide some references to suppress high-frequency interferences by Ni-Zn ferrite ring.

A Family of Early-Time Approximations for Fluid-Structure Interaction

1980 ◽  
Vol 47 (4) ◽  
pp. 703-708 ◽  
Author(s):  
C. A. Felippa
Keyword(s):  
Plane Wave ◽  
Acoustic Impedance ◽  
High Frequency ◽  
Fluid Structure Interaction ◽  
Early Time ◽  
Surface Interaction ◽  
Structure Interaction ◽  
Differential Formulation ◽  
Impedance Characteristics ◽  
Acoustic Fluid

A hierarchical family of early-time, high-frequency asymptotic, surface interaction approximations is derived for a structure submerged in an infinite acoustic fluid. Kirchhoff’s retarded-potential integro-differential formulation is used as exact source formula. The well-known plane-wave and curved-wave approximations result as the first two members of the hierarchy. Acoustic impedance characteristics of the first four members are exhibited for several sample geometries.

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