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348documents trouvés

17294
01/09/2017

Multiobjective optimal design of Light Emitting Diode (LED) lightings

J.DULOUT, B.JAMMES, L.SEGUIER, A.BARROSO, P.DUPUIS, G.ZISSIS, C.ALONSO

ISGE, I2C, LAPLACE

Rapport LAAS N°17294, Septembre 2017, 9p.

Lien : https://hal.laas.fr/hal-01575731

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Abstract

In this paper, a Pareto multiobjective optimization is performed to design new luminaires, finding the optimal forward current, number of LEDs and proper heatsink by taking into account the cost, the energy consumption and the impact on the environment (life cycle analysis from cradle to grave). Three commercialized white LEDs have been studied and modelled in terms of optical, electrical, thermal and aging performances. The multiobjective methodology is also applied to other lamps (incandescent, halogen, fluorescent), indicating that LED lighting has a great potential of energy and cost savings with a minimization of environmental impacts on the long run.

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17156
17/08/2017

Ultra-rapid and fully integrated active pyrotechnic safety switches integrating nanothermites

A.NICOLLET, S.CHARLOT, V.BAIJOT, A.ESTEVE, C.ROSSI

NEO, TEAM

Rapport LAAS N°17156, Août 2017, 1p.

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17278
08/07/2017

Study of the thermal aging effect on the conducted emission of a synchronous buck converter

A.BOYER, M.GONZALEZ SENTIS, C.GHFIRI, A.DURIER

ESE, IRT

Manifestation avec acte : International Workshop on Electromagnetic Compatibility of Integrated Circuits ( EMC Compo ) 2017 du 04 juillet au 08 juillet 2017, St Petersbourg (Russie), Juillet 2017, pp.79-84 , N° 17278

Lien : https://hal.archives-ouvertes.fr/hal-01574379

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This paper studies the impact of the accelerated thermal aging on the conducted emission produced by a synchronous buck converter. The most degraded devices mounted on the DC-DC converter are identified and modeled in order to simulate the evolution of conducted emission and anticipate risks of non-compliance to emission requirements.

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17276
08/07/2017

Modeling methodology of the conducted emission of a DC-DC converter board

A.BOYER, M.GONZALEZ SENTIS, C.GHFIRI, A.DURIER

ESE, IRT

Manifestation avec acte : International Workshop on Electromagnetic Compatibility of Integrated Circuits ( EMC Compo ) 2017 du 04 juillet au 08 juillet 2017, St Petersbourg (Russie), Juillet 2017, pp.73-78 , N° 17276

Lien : https://hal.archives-ouvertes.fr/hal-01574376

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Abstract

This paper proposes a methodology to model an electronic board according to a bottom-up approach. This method is applied to build the model of a synchronous buck DC-DC converter board for conducted emission prediction purpose. The different steps to select the model terminals and the construction of the component and PCB interconnect models are described.

140662
17275
08/07/2017

Radiated suceptibility investigation of electronic board from near field scan method

N.LACRAMPE, S.SERPAUD, A.BOYER, S.TRAN

ISGE, Nexio, Toulouse, ESE, Airbus Operations

Manifestation avec acte : International Workshop on Electromagnetic Compatibility of Integrated Circuits ( EMC Compo ) 2017 du 04 juillet au 08 juillet 2017, St Petersbourg (Russie), Juillet 2017, pp.125-130 , N° 17275

Lien : https://hal.archives-ouvertes.fr/hal-01574389

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This paper aims at studying the near field measurement method in immunity to investigate the robustness of components and electronic boards. An ARINC receiver is used as case study. The experimental setup , the probe calibration method and the experimental results are presented. Investigation method and results are discussed and compared to normative measurement method like TEM cell measurement.

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17281
08/07/2017

Methodology of modeling of the internal activity of a FPGA for conducted emission prediction purpose

C.GHFIRI, A.DURIER, C.MAROT, A.BOYER, S.BEN DHIA

ESE, IRT, AIRBUS Groupe

Manifestation avec acte : International Workshop on Electromagnetic Compatibility of Integrated Circuits ( EMC Compo ) 2017 du 04 juillet au 08 juillet 2017, St Petersbourg (Russie), Juillet 2017, 6p. , N° 17281

Lien : https://hal.archives-ouvertes.fr/hal-01574384

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Abstract

This paper describes a new methodology of construction of the internal activity block of an ICEM-CE model of an FPGA based on a predictive approach using the estimation tools of the dynamic power and the static timing proposed by the manufacturer of the integrated circuit.

140714
17299
08/07/2017

Proposal for combined conducted and radiated emission modelling for Integrated Circuit

S.SERPAUD, C.GHFIRI, A.BOYER, A.DURIER

IRT, ESE

Manifestation avec acte : International Workshop on Electromagnetic Compatibility of Integrated Circuits ( EMC Compo ) 2017 du 04 juillet au 08 juillet 2017, St Petersbourg (Russie), Juillet 2017, pp.172-177 , N° 17299

Lien : https://hal.archives-ouvertes.fr/hal-01574387

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Abstract

This paper describes a methodology to build a combined conducted and radiated emission model for integrated circuits. The development of emission models of a FPGA extracted from two different approaches is presented and discussed. The first approach allows to build a predictable model from FPGA implementation and some passive measurement on FPGA device. The second approach allows to build a model from only the near field measurement. In conclusion, the accuracy of both models as well as the advantages and disadvantages are discussed.

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17223
06/07/2017

Optimal scheduling of a battery-based energy storage system for a microgrid with high penetration of renewable sources

J.DULOUT, A.LUNA, A.ANVARI-MOGHADDAM, C.ALONSO, J.GUERRERO, B.JAMMES

ISGE, Aalborg

Manifestation avec acte : ELECTRIMACS ( ) 2017 du 04 juillet au 06 juillet 2017, Toulouse (France), Juillet 2017, 6p. , N° 17223

Lien : https://hal.laas.fr/hal-01533070

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A new scheduling method is proposed to manage efficiently the integration of renewable sources in microgrids (MGs) with energy storage systems (ESSs). The purpose of this work is to take into account the main stress factors influencing the ageing mechanisms of a battery energy storage system (BESS) in order to make an optimal dispatch of resources in the microgrid and enhance the storage system lifetime while minimizing the cost of electric consumption. The load demand and generation profiles are derived from the analysis of consumption and renewable production (solar photovoltaic sources and wind turbines) of the Western Denmark electric grid. Thus, the proposed microgrid is mainly fed by renewable sources and few electricity is coming from the main grid (which helps operating costs minimization). In this respect, a cost analysis is performed to find the optimal hourly power output of the BESS as well as the purchased electricity from the utility.

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17178
06/07/2017

Development of a photovoltaic low voltage DC microgrid for buildings with energy storage systems

J.DULOUT, C.ALONSO, L.SEGUIER, B.JAMMES

ISGE, I2C

Manifestation avec acte : ELECTRIMACS ( ) 2017 du 04 juillet au 06 juillet 2017, Toulouse (France), Juillet 2017, 6p. , N° 17178

Lien : https://hal.laas.fr/hal-01526247

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Abstract

In order to develop a sustainable datacenter, which would help to validate energy management and task scheduling algorithms, a low voltage direct current (LVDC) microgrid (MG) has been deployed in the ADREAM Building-Integrated Photovoltaic (BIPV) of the LAAS-CNRS in Toulouse, France. This MG is composed of a 1 kWp PV source, 300 Ah – 36 V lead-acid batteries, 330 F – 48 V supercapacitor (SC) pack and DC loads (cloud servers, USB chargers, sensors monitoring an apartment…). A very simple and efficient energy flow management strategy, based on the " DC bus signaling " approach has been implemented. It takes advantage of the DC bus architecture and enables a scalable electrical structure constituted of several sources, loads and storage elements easy to connect/disconnect via their converters. The development of this MG put in evidence the need for future theoretical developments regarding the determination of optimal DC bus signaling thresholds.

140303
17287
05/07/2017

Atypical properties of FIB-patterned RuOx nanosupercapacitors

A.FERRIS, B.REIG, A.EDDARIR, J.F.PIERSON, S.GARBARINO, D.GUAY, D.PECH

ISGE, TEAM, IJL, INRS, Québec

Revue Scientifique : ACS Energy Letters, Vol.2, N°8, pp.1734-1739, Juillet 2017 , N° 17287

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Abstract

Small-scale electrochemical capacitors, also called microsupercapacitors, have been the subject of intense research in the past few years as miniaturized energy storage components for modern electronics. Although numerous microfabrication processes have been successfully assessed to achieve low-profile supercapacitors with submillimeter-scale features, several advances still need to be made in their performance characteristics to become industrially viable components. Here we report the occurrence of unexpected properties of on-chip supercapacitors when reducing interelectrode spacing down to the nanometer scale. An ultrahigh power concomitant with a high capacitance and energy density, an unforeseeable extended cell voltage, and an impressive lifetime were obtained at such small dimensions with a focused ion beam (FIB)-patterned nanosupercapacitor based on RuOx pseudocapacitive material. The scaling relationship between miniaturized supercapacitors and electrochemical responses leads to valuable understanding of electrode reactions and rate-limiting steps. This finding offers new opportunities in the design of integrated energy storage devices with improved properties.

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