2021 IEEE Pulsed Power Conference (PPC)最新文献

Dielectric Elastomers: An Investigation in the Electromechanical Response to Different Ratios of Active and Passive Regions of Dielectric Elastomers 介电弹性体:介电弹性体有源区和无源区不同比例下的机电响应研究

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733151

B. Onyenucheya, M. Ashford, J. Zirnheld, K. Burke

{"title":"Dielectric Elastomers: An Investigation in the Electromechanical Response to Different Ratios of Active and Passive Regions of Dielectric Elastomers","authors":"B. Onyenucheya, M. Ashford, J. Zirnheld, K. Burke","doi":"10.1109/PPC40517.2021.9733151","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733151","url":null,"abstract":"Dielectric elastomers can exhibit load deformation of more than 1692% percent. The deformation is made possible when an external electric field interacts with the dielectric elastomer material, this leads to electrical polarization within the bulk media of the material and charge accumulation on a compliant electrode. This action causes a compressive force that squeezes the film thickness and expands the surface area leading to actuation of the material. The geometric configuration of the complaint electrode on the surface area of the dielectric elastomer can directly influence the electromechanical response of the film. The surface of the dielectric elastomer can be divided into two regions: the active region, which is the surface area of the film that is covered by the compliant electrode, and the passive region, which is the area of the film that remains uncovered. The purpose of this research is to determine the optimal ratio of active vs passive regions and its impact on the electromechanical performance (actuation, dielectric and electromechanical breakdown).","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"95 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116645732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dielectric Elastomers: An Investigation in the Thermal Effects on Compliant Electrode Composition 介电弹性体:柔性电极组成的热效应研究

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733133

B. Onyenucheya, M. Ashford, J. Zirnheld, K. Burke

{"title":"Dielectric Elastomers: An Investigation in the Thermal Effects on Compliant Electrode Composition","authors":"B. Onyenucheya, M. Ashford, J. Zirnheld, K. Burke","doi":"10.1109/PPC40517.2021.9733133","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733133","url":null,"abstract":"Dielectric Elastomers (DE) are soft polymers sandwiched between two electrodes that have the unique ability to exhibit large strains when exposed to an external electric potential. This property makes these polymers popular candidates for applications in soft robotic, actuators, and energy harvesting. However, it is the applied electrodes that govern this phenomenon, for this reason it is important for research to be done on the characterization of these electrodes’ properties. Environmental parameters such as varying temperature have the potential to alter material characteristics which can cause disruption of the device intended performance. The goal of this research is to investigate thermal effects on the electromechanical properties of DE’s electrodes. Four carbon grease electrode samples were created using a mixture of high vacuum grease (Dow Corning, USA), Ketjen black carbon powder, and carbon graphite (Asbury Carbons, USA). The electrical percolation threshold was met at a ratio of 0.5:7g and 1:7 g of Ketjen black carbon black samples, while the threshold was met at a ratio of 5:7 g and 6:7g of graphite samples. Three sets of experiments were conducted to investigate the thermal effects the carbons samples produce in voltage induced actuation, max breakdown voltage, and elongation breakpoint tests where the four samples are subjected to various temperatures. From these experiments, a comparative analysis on parameters like young’s modulus, induced actuation displacement, breakdown voltage, and applicable force are tabulated and presented.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125431845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The shock wave configuration used in nonlinear transmission lines to improve the voltage modulation depth 在非线性输电线路中采用激波结构来提高电压调制深度

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733052

L. P. Silva Neto, V. C. Santos Junior, J. O. Rossi, J. Barroso, E. Schamiloglu, E. Rangel, G. Lima, L. F. Santos

{"title":"The shock wave configuration used in nonlinear transmission lines to improve the voltage modulation depth","authors":"L. P. Silva Neto, V. C. Santos Junior, J. O. Rossi, J. Barroso, E. Schamiloglu, E. Rangel, G. Lima, L. F. Santos","doi":"10.1109/PPC40517.2021.9733052","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733052","url":null,"abstract":"Nonlinear transmission lines (NLTLs) using varactor diodes can produce high-frequency waves on the order of some tens of megahertz. They reach only low power signals, and a way to improve the voltage modulation depth (VMD) without employing semiconductor devices is by using shock wave configuration. The shock wave configuration consists of several lines in parallel connected to the same source and the load. The main electrical parameters analyzed in these lines are frequency, VMD, power, and the number of lumped-element sections. This work proposes the shock wave configuration for improving the VMD using multiple NLTLs. NLTLs in the shock wave configuration were implemented on printed circuit boards and simulated by using the LT-Spice software. Simulation and tests of a single line with 7 lumped-sections produced an RF signal at a frequency of about 30 MHz, VMD around 0.79 V. On the other hand, by using a shock wave configuration with four lines, the VMD increased to 3.73 V, which means a gain of 4.72. Other parameters remained unchanged under the shock wave configuration.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122578505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GFP Introduction for RAW264.7 Cells by Combining Nanosecond High Voltage Pulse and Millisecond pulse 基于纳秒高压脉冲和毫秒脉冲组合的RAW264.7细胞GFP介绍

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733150

S. Kono, N. Tominaga

引用次数: 0

Computational Studies on an Induction Coilgun 感应线圈枪的计算研究

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733155

Ranashree Ram, M. J. Thomas

{"title":"Computational Studies on an Induction Coilgun","authors":"Ranashree Ram, M. J. Thomas","doi":"10.1109/PPC40517.2021.9733155","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733155","url":null,"abstract":"Induction coilgun works on the principle of electromagnetic induction between an array of coils, which are wound on a long insulating barrel of appropriate length, and an electrically conducting projectile placed inside the barrel. Previously charged high voltage capacitor banks are sequentially discharged into the coils through high voltage solid-state switches leading to the generation and flow of high magnitude impulse currents through the coils. Time-varying magnetic flux thus produced by the pulsed currents through the coils interact with the projectile inside and induce a resultant current on it. The electromagnetic force exerted on the projectile is a product of the excitation current through the coil (ic), induced current on the projectile (ip), and the mutual inductance gradient (dMcp/dx, i.e., the change in mutual inductance between the coil and the projectile as the projectile travels through the coil). The induced current on the projectile depends on the level of magnetic coupling between the coil and the projectile, which is governed by their geometric property, viz., diameter, number of winding layers in the coils, and number of winding turns per layer of the coils; diameter, length, shape, and material of the projectile as well as the projectile’s position w.r.t. the coils as it moves along the barrel. In this paper, the following parameters, viz., number of winding layers of the coil, number of winding turns per layer of the coil, and the projectile length are varied, keeping the pulsed power source (PPS) parameters as well as the projectile’s outer diameter and mass fixed. The analysis is performed using a commercially available Finite Element Method (FEM)-based software, Ansoft Maxwell. Results obtained from the analysis are used to design and develop a two-stage induction coilgun in the author’s laboratory.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131714423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Maximum Power Point Tracking of Inductive Resonant Wireless Power Transfer Systems Using a Buck Converter on the Receiving Side to Mitigate the Effects of Coil Misalignment 电感谐振无线电力传输系统的最大功率点跟踪在接收侧使用Buck变换器以减轻线圈错位的影响

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733153

A. Bilbao, S. Bayne

引用次数: 1

Development and test of two high power conventional pulsers for radiography application 两种用于放射照相的大功率常规脉冲机的研制和试验

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733140

F. Bayol, A. Coe, Clément Gaston, P. Mouly, Arthur Piaser, K. Van de Wiel, Mathieu Vaurs, Aled Jones, M. Evans, J. Haynes, J. Rutledge, Phil R. Williams

{"title":"Development and test of two high power conventional pulsers for radiography application","authors":"F. Bayol, A. Coe, Clément Gaston, P. Mouly, Arthur Piaser, K. Van de Wiel, Mathieu Vaurs, Aled Jones, M. Evans, J. Haynes, J. Rutledge, Phil R. Williams","doi":"10.1109/PPC40517.2021.9733140","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733140","url":null,"abstract":"This work concerns the development and testing of 2 radiography pulsers (~2MV, 650kA, ~100ns) to enhance the hydrodynamic testing capabilities of the Atomic Weapons Establishment (AWE) in Aldermaston (UK). The generators have to fire on a Plasma Filled Rod Pinch diode (PFRP) to provide two ultra-bright X-ray sources on 2 radiography axis separated by 45°. The design uses a high voltage high-energy 20-stage balanced Marx charged up to +/-100kV. It uses specifically developed switches operating under pressurized dry air. The machines do not use any SF6. This Marx is fired with a small jitter to charge a ~50ns deionized water Pulse Forming Line (PFL) up to an operating voltage of ~4.3MV (at +/-90kV Marx charge). The discharge of this line occurs thanks to a multi-channel triggered oil switch providing a low inductance and associated fast switching. The ~100ns width pulse generated is transmitted by a water transmission line to a vacuum chamber using a radial monolithic interface. This output is similar to the Naval Research Laboratory Gamble II generator on which was developed and tested the AWE’s PFRP diode. Initially, the generator fired on a resistive load prior to using a Large Area Diode (LAD) providing the ~3Ohm expected impedance. The Marx tank has a hydraulically operated side door under which the Marx can slide out and hang for ease of assembly and maintenance. So, the 2 machines have a handed design to accommodate their installation in a refurbished building. The general electrical and mechanical design of these generators, as well as the main problems encountered during the testing phase, have already been presented in [1]. This publication will therefore just remind the definition of the system and focus on the latest optimizations and results of the 2 machines, both on the resistive load and on the LAD. The operation of the main oil switch will also be described in detail.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124117732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Attempts at optimization and analysis of C armatures using action parameters 尝试使用动作参数对C电枢进行优化和分析

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733132

G. Goyal, J. P. Khatait, S. Mukherjee

引用次数: 1

Modelling and Design of Halbach Array PM Excited Steel Core Outer Rotor Compulsator∗ Halbach阵列永磁励磁钢芯外转子强制器的建模与设计*

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733123

Priyvrat Vats, Bhim Singh

{"title":"Modelling and Design of Halbach Array PM Excited Steel Core Outer Rotor Compulsator∗","authors":"Priyvrat Vats, Bhim Singh","doi":"10.1109/PPC40517.2021.9733123","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733123","url":null,"abstract":"Conventionally, railgun uses a capacitor-based source, which cannot provide the sinusoidal nature of the current. This creates a large muzzle arc due to the immediate discontinuation of the large current. This naturally leads the compulsator to be the best alternative for railgun supply. The compulsator's energy and power density are also large compared to the capacitor-based supply. Therefore, in this paper, a 10 MJ, 4-phase, 4-pole, 15000 rpm steel core stator, Halbach array permanent magnet (PM) excitation compulsator for target performance is investigated in detail. The steel core stator and air-core rotor combination are considered for the design to reduce the permanent magnet material. The PM excitation in the compulsator leads to a reduction in voluminous design and removes slip-ring arrangement. This also reduces the chance of mechanical failure. The electromagnetic analysis for specified compulsator is performed in Ansys electromagnetic suite with a magneto-static solver for excitation design and transient co-simulation with simplore for circuit discharge analysis. The mathematical modelling of the designed compulsator is also presented in detail. To design more realistic practical design factors like temperature rise, PM demagnetization effect, eddy current distribution in compensating shield, are also considered. According to results, the newly designed compulsator achieves the target objectives and is comparable to all air-core compulsator.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125038649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hybrid Armature Design Based on Compliance Matching with C Armatures 基于C型电枢柔度匹配的混合电枢设计

2021 IEEE Pulsed Power Conference (PPC) Pub Date : 2021-12-12 DOI: 10.1109/PPC40517.2021.9733137

G. Goyal, J. P. Khatait, Shubhabrata Mukherjee

{"title":"Hybrid Armature Design Based on Compliance Matching with C Armatures","authors":"G. Goyal, J. P. Khatait, Shubhabrata Mukherjee","doi":"10.1109/PPC40517.2021.9733137","DOIUrl":"https://doi.org/10.1109/PPC40517.2021.9733137","url":null,"abstract":"The most common metal armatures used in an Electro-Magnetic Launcher (EML) are the C-armatures and the multi-fiber brush armatures. A brush armature has a shorter current path and thus has a less ohmic loss. Nevertheless, brush armatures lack compressive stiffness to provide mechanical contact forces at the current ramp-up and ramp-down periods. Also, by construction, brush armatures lack the mechanical strength to accept extreme mechanical loads during operation. This article presents a hybrid armature design that incorporates qualities of both C-armature and brush armature projectile technologies. The design starts with a monolithic solid block armature to provide a short current path. Compliant mechanism design methods are then applied to provide mechanical compliance at the contact surface equal to a C-armature. The resulting hybrid armature provides mechanical pressure for current conduction when electromagnetic (EM) forces are insufficient, but the current path inside the armature is also minimum to reduce Ohmic loss. Plots are provided that compares contact pressure distribution, contact surface current density, muzzle velocity, and efficiency of the hybrid armature and a C-armature. The resulting hybrid armature has 33% less parasitic mass that delivers 22% higher kinetic energy to the payload.","PeriodicalId":307571,"journal":{"name":"2021 IEEE Pulsed Power Conference (PPC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121443130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0