A 16 MJ compact pulsed power system for electromagnetic launch

Dai, Ling; Zhang, Qin; Zhong, Heqing; Lin, Fuchang; Li, Hua; Wang, Yan; Su, Cheng; Huang, Qinghua; Xu, Chen

doi:10.1063/1.4921910

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…Also, the discharge currents vary from several 100 kA (electrothermal guns) to several MA (rail guns) . Recently, a pulsed power system of 16 MJ for electromagnetic railgun is established that uses the capacitor having energy density of 1.5 J/cm 3 and life of ∼3 000 shot times . There are various manufacturers of film capacitors, like G.E.…”

Section: Applicationsmentioning

confidence: 99%

“…107 Recently, a pulsed power system of 16 MJ for electromagnetic railgun is established that uses the capacitor having energy density of 1.5 J/cm 3 and life of ∼3 000 shot times. 108 There are various manufacturers of film capacitors, like G.E. (U.S.A.), Nissei/Arcotronics (Japan), Matsushita (Japan), ABB (Europe), Aerovox (U.S.A.), Cooper Industry (U.S.A.), Vishay (Europe), Rubycon Corporation (Japan), KEMET Corporation (U.S.), etc.…”

Section: Applicationsmentioning

confidence: 99%

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Recent Progress on Ferroelectric Polymer-Based Nanocomposites for High Energy Density Capacitors: Synthesis, Dielectric Properties, and Future Aspects

2016

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Dielectric polymer nanocomposites are rapidly emerging as novel materials for a number of advanced engineering applications. In this Review, we present a comprehensive review of the use of ferroelectric polymers, especially PVDF and PVDF-based copolymers/blends as potential components in dielectric nanocomposite materials for high energy density capacitor applications. Various parameters like dielectric constant, dielectric loss, breakdown strength, energy density, and flexibility of the polymer nanocomposites have been thoroughly investigated. Fillers with different shapes have been found to cause significant variation in the physical and electrical properties. Generally, one-dimensional and two-dimensional nanofillers with large aspect ratios provide enhanced flexibility versus zero-dimensional fillers. Surface modification of nanomaterials as well as polymers adds flavor to the dielectric properties of the resulting nanocomposites. Nowadays, three-phase nanocomposites with either combination of fillers or polymer matrix help in further improving the dielectric properties as compared to two-phase nanocomposites. Recent research has been focused on altering the dielectric properties of different materials while also maintaining their superior flexibility. Flexible polymer nanocomposites are the best candidates for application in various fields. However, certain challenges still present, which can be solved only by extensive research in this field.

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Recent Progress on Ferroelectric Polymer-Based Nanocomposites for High Energy Density Capacitors: Synthesis, Dielectric Properties, and Future Aspects

2016

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Development of a pulsed power supply with tens of milliseconds flattop time

Ma¹,

Yu²,

Xiao³

et al. 2020

Review of Scientific Instruments

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In order to generate a current pulse with tens of milliseconds flattop time on an inductive load for pulse magnetic window technology research, a prototype of pulsed power supply is fabricated and tested. It is composed of several pulse forming units with capacitor banks and a thyristor switch and can generate a flattop current pulse by triggering sequentially the thyristor valve of pulse forming units at certain time or adjust a current waveform by altering triggering time of units. The results show that the prototype with four pulse forming units can generate a current pulse with 5 ms flattop time and 35 kA peak current, and its energy transfer efficiency is significantly higher than that of conventional circuits such as parallel capacitor banks or pulse forming networks.

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Development of a low voltage railgun in the context of a swept lightning stroke on an aircraft

Andraud

Martins

Zaepffel

et al. 2022

Review of Scientific Instruments

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When aircraft are struck by lightning, the aircraft’s structural fuselage and components are stressed by electrical and thermo-mechanical constraints, which imposes a need for reliable experimental test benches to design accurate and enhanced lightning protection. In order to reproduce the in-flight conditions of an aircraft in a laboratory, the aim of this work is to design and implement launch equipment able to propel aeronautical test samples at speeds characteristic of an aircraft— from 10 m/s for ultra-light gliders to 100 m/s for airliners—before striking it with an electric arc within the laboratory dimensions of several meters. After a comparison of several propulsion techniques, the selected solution is an augmented electromagnetic railgun launcher. Since it requires the injection of a high current to be efficient and a low voltage operative point for safety considerations, specific and original electric generator and rail structures have been designed and experimentally implemented. Particular attention has been paid to the experimental problems encountered and mainly the sliding contact, since almost no literature references are available for railgun equipment at this level of performance. Then, based on different experimental implementations, a dynamic and ballistic model of the projectile has been developed to evaluate and characterize friction forces with the aim of predicting launcher performances with different inputs. This serves to control the speed of the material test sample during the lightning strike. Finally, the railgun equipment has been coupled to a lightning generator to reproduce the lightning strike of an aircraft respecting in-flight conditions.

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A 16 MJ compact pulsed power system for electromagnetic launch

Cited by 6 publications

References 9 publications

Recent Progress on Ferroelectric Polymer-Based Nanocomposites for High Energy Density Capacitors: Synthesis, Dielectric Properties, and Future Aspects

Recent Progress on Ferroelectric Polymer-Based Nanocomposites for High Energy Density Capacitors: Synthesis, Dielectric Properties, and Future Aspects

Development of a pulsed power supply with tens of milliseconds flattop time

Development of a low voltage railgun in the context of a swept lightning stroke on an aircraft

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