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Power density

About: Power density is a research topic. Over the lifetime, 9534 publications have been published within this topic receiving 197264 citations. The topic is also known as: volumic power & volume power density.


Papers
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Journal ArticleDOI
09 Jul 2019
TL;DR: With the ultrahigh power density and fast charge-discharge capability, a dielectric capacitor is an important way to meet the fast increase in the demand for an energy storage system such as pulsed...
Abstract: With the ultrahigh power density and fast charge–discharge capability, a dielectric capacitor is an important way to meet the fast increase in the demand for an energy storage system such as pulsed...

79 citations

Patent
07 May 2001
TL;DR: In this paper, a double layer activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and, even when charge and discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density.
Abstract: Activated carbon adapted for electric double layer capacitors is provided, which capacitors can give a large power density per unit volume and which capacitors, even when charge-and-discharge cycle is repeated under a large current or a constant voltage is continuously applied for a long time, undergo less decrease in output density. That is, the present invention relates to the activated carbon manufactured by carbonization of coconut shell, which has a BET specific surface area of 2000 m2/g to 2500 m2/g, an average pore diameter of 1.95 nm (19.5 Å) to 2.20 nm (22 Å) and a pore volume of pores having a pore diameter calculated according to a Cranston-Inkley method of 5.0 nm (50 Å) to 30.0 nm (300 Å), of 0.05 cm3/g to 0.15 cm3/g.

78 citations

Journal ArticleDOI
TL;DR: In this article, the design and control of two hybrid source using supercapacitors, fuel cell, with and without batteries on the DC link are discussed. But the authors focus on the comparison of the two structures and on the principles of control of this two hybrid power sources.

78 citations

Journal ArticleDOI
TL;DR: In this article, polyaniline (PANI) has been potentiodynamically deposited on stainless steel substrate and characterized in a gel polymer electrolyte (GPE), which facilitates a voltage limit of the capacitor to 1 V instead of 0.75 V in aqueous electrolytes.
Abstract: Studies on redox supercapacitors employing electronically conducting polymers are of great importance for hybrid power sources and pulse power applications. In the present study, polyaniline (PANI) has been potentiodynamically deposited on stainless steel substrate and characterized in a gel polymer electrolyte (GPE). Use of the GPE facilitates a voltage limit of the capacitor to 1 V, instead of 0.75 V in aqueous electrolytes. From charge-discharge studies of the solid-state PANI capacitors, a specific capacitance of 250 F g(-1) has been obtained at a specific power of 7.5 kW kg(-1) of PANI. The values of specific capacitance and specific power are considerably higher than those reported in the literature. High energy and high power characteristics of the PANI are presented. (C) 2002 The Electrochemical Society.

78 citations

Proceedings ArticleDOI
18 Mar 2010
TL;DR: In this paper, a 5kW, 400V-48⋖56V phase-shift PWM converter with LC-output filter is designed for highest efficiency with a volume limitation and the consideration of the part-load efficiency.
Abstract: In the last decade power electronic research focused on the power density maximization mainly to reduce initial systems costs [1]. In the field of data centers and telecom applications, the costs for powering and cooling exceed the purchasing cost in less than 2 years [2]. That causes the changing driving forces in the development of new power supplies to efficiency, while the power density should stay on a high level. The commonly used DC-DC converter in the power supply unit (PSU) for data centers and telecom applications are full bridge phase-shift converters since they meet the demands of high power and efficient power conversion, a compact design and the constant operation frequency allows a simple control and EMI design. The development of the converter with respect to high efficiency has a lot of degrees of freedom. An optimization procedure based on comprehensive analytical models leads to the optimal parameters (e.g. switching frequency, switching devices in parallel and transformer design) for the most efficient design. In this paper a 5kW, 400V–48⋖56V phase-shift PWM converter with LC-output filter is designed for highest efficiency (η ≥99%) with a volume limitation and the consideration of the part-load efficiency. The components dependency as well as the optimal design will be explained. The realized prototype design reaches a calculated efficiency of η = 99.2% under full load condition and a power density of ρ = 36W/in3 (2.2 kW/liter).

78 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023652
20221,294
2021519
2020594
2019595
2018600