Capacitors for high power electronics

Sarjeant, W.J.; MacDougall, F.W.

doi:10.1109/ppc.1997.679406

Cited by 11 publications

(6 citation statements)

References 9 publications

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“…[9][10][11][12] Capacitors based on dielectrics are conventionally parallelplate capacitors in which a dielectric is sandwiched by electrically conducting plates. The dielectric material can be paper, polymer, 13 a high dielectric constant ceramic such as barium titanate in thin film or thick film forms, or other electrically insulating materials. The most effective existing examples use epoxy as the structural component and an ionic liquid based electrolyte.…”

mentioning

confidence: 99%

A Structural Supercapacitor Based on Graphene and Hardened Cement Paste

Zhang

2015

J. Electrochem. Soc.

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This paper presents a novel structural supercapacitor based on graphene and hardened cement paste. The maximum specific capacitance is more than 10 F g −1 at the current density of 1A g −1 . The almost ideal rectangular cyclic voltammetry (CV) curve of the structural supercapacitors means that there is no pseudocapacitance effect. The triangular charge-discharge plots of the structural supercapacitor indicate an ideal double layer mechanism in the structural supercapacitor. Both the compressive strength and specific capacitance increase as the water-cement ratio decreases. But they don't change consistently with cement hydration time. As the cement hydrates, the strength increases, but the specific capacitance decreases and tends to a constant value.

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confidence: 99%

A Structural Supercapacitor Based on Graphene and Hardened Cement Paste

Zhang

2015

J. Electrochem. Soc.

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“…The B-PFL consists of a l = 1 m long, oil-filled, doublecoaxial cylindrical geometry, having an inner electrode with an outer radius r 1 (Fig. 6) was a tedious process, mainly related to finding the optimum diameter and position of the electric grading ring attached to the inner HV electrode in respect to a recess in the outer surface of that electrode (Fig.…”

Section: Design and Calculation Of Blumlein Pfl Paramet Ersmentioning

confidence: 99%

A 10 GW Tesla-Driven Blumlein Pulsed Power Generator

Novac

Wang

Smith

et al. 2014

IEEE Trans. Plasma Sci.

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“…There is a paucity of information and software tools focused on the internal conditions of the common capacitor with clear linkages to physical construction and metallic film parameters. Wound cylindrical capacitors are a common manifestation of low frequency metallized polypropylene (MPP) capacitors for low frequency and mains-voltage applications such as for electric motor circuits, power factor correction, bypassing and electrical noise suppression [10], [11].…”

Section: Introductionmentioning

confidence: 99%

“…Each strip has a very thin metallization layer on one side with a clear strip along one boundary [10]- [12]. The two strips are wound such that the clear margins are at opposite ends of the cylinder as depicted in Figs.…”

Section: Introductionmentioning

confidence: 99%

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Distributed Circuit Modeling of Multilayer Capacitor Parameters Related to the Metal Film Layer

Brown

2007

IEEE Trans. Comp. Packag. Technol.

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Linkage between the distributed-circuit capacitor model and multi-layer capacitor structures is demonstrated. Capacitor inductance leading to self-resonance in standard metallized polymer capacitors arises from lead and package inductance and can be represented by lumped inductance external to the capacitor modeling in this paper.Distributed internal capacitor inductance is negligible in metallized polymer capacitors for most applications and therefore is not considered in the analysis. Two different distributed-circuit topologies, both of which arise in practice-one by design and the other by degradation-are considered. One has the two connecting electrodes on opposite ends of the capacitor and the other has both input electrodes on the same end. The electrical performance of the two connection topologies is compared using numerical 10-stage lumped element modeling. Cross comparisons are made using diffusion equation modeling for the single-end connection topology. Strong correspondence between results from numerical lumped element distributed approximations and from diffusion equation analysis for the single-end connection is demonstrated up to 100 MHz, this inferring similar accuracy for lumped element modeling of the double-end connected capacitor topology. The results show that the two connection topologies exhibit similar behavior up to at least the typical self resonance frequency of the capacitor, except for the cross-dielectric voltage and cross-width power dissipation profiles which are fundamentally different. Voltage drop across the metallic films is shown to be small in normal steady state operation. The contribution of the metallic film to the equivalent series resistance is shown to be constant with frequency up to a frequency where distributed -filtering becomes significant. Beyond this, both equivalent series resistance and capacitance fall with the square root of frequency for the single-end connected capacitor. Similarly, the dissipation factor initially rises in direct proportion to frequency and power dissipated in the metal film increases with the square of frequency. Progressive disconnection of distant metal film with frequency, due to filtering, is shown to be responsible for the changes in these relationships and the parameters of the capacitor.

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Capacitors for high power electronics

Cited by 11 publications

References 9 publications

A Structural Supercapacitor Based on Graphene and Hardened Cement Paste

A Structural Supercapacitor Based on Graphene and Hardened Cement Paste

A 10 GW Tesla-Driven Blumlein Pulsed Power Generator

Distributed Circuit Modeling of Multilayer Capacitor Parameters Related to the Metal Film Layer

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