Laboratoire d’analyse et d’architecture des systèmes
J.DULOUT, B.JAMMES, L.SEGUIER, A.BARROSO, P.DUPUIS, G.ZISSIS, C.ALONSO
ISGE, I2C, LAPLACE
Rapport LAAS N°17294, Septembre 2017, 9p.
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.
A.NICOLLET, S.CHARLOT, V.BAIJOT, A.ESTEVE, C.ROSSI
Rapport LAAS N°17156, Août 2017, 1p.
A.BOYER, M.GONZALEZ SENTIS, C.GHFIRI, A.DURIER
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
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.
A.BOYER, M.GONZALEZ SENTIS, C.GHFIRI, A.DURIER
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
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.
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
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.
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
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.
S.SERPAUD, C.GHFIRI, A.BOYER, A.DURIER
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
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.
J.DULOUT, A.LUNA, A.ANVARI-MOGHADDAM, C.ALONSO, J.GUERRERO, B.JAMMES
Manifestation avec acte : ELECTRIMACS ( ) 2017 du 04 juillet au 06 juillet 2017, Toulouse (France), Juillet 2017, 6p. , N° 17223
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.
J.DULOUT, C.ALONSO, L.SEGUIER, B.JAMMES
Manifestation avec acte : ELECTRIMACS ( ) 2017 du 04 juillet au 06 juillet 2017, Toulouse (France), Juillet 2017, 6p. , N° 17178
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.
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
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.