Eddy-Current Loss in a Conductive Material Inserted into a U-cored Electromagnet Device

International audienceThis paper deals with the measurement and estimation of eddy-current losses in conductive plate (e.g. Permanent Magnet (PM) or Aluminum) involved in machine in general and in those with permanent magnets in particular e.g. Permanent Magnet Synchronous Machine (PMSM). The authors presented an experimental device for evaluating eddy current losses generated in the conductive plates and in order to derive an equivalent circuit diagram leading to analytical and experimental model of by eddy currents losses in a conductive material herein the aluminum. This model based on the electrical equivalent circuit (EEC) is determined from different tests such as no-load and short-circuit tests and has allowed us to quantify the various losses created in the conductive material by using the method of separation of losses when the electromagnet is with and without the conductive plate

Réduction de la pauvreté par l'amélioration de la qualité de l'énergie électrique de la Société Béninoise d'Energie Electrique (SBEE)

International audienceLes auteurs ont étudié la qualité de l'énergie électrique au Bénin sous deux aspects, la forme d'onde et le taux d'harmoniques d'une part et l'énergie non distribuée d'autre part. Ces deux analyses sont faites à partir de mesures effectuées sur les réseaux de distribution de la SociétéBéninoise d'Energie Electrique (SBEE) à des moments critiques et précis de la journée sur une période relativement étendue. Au vu des résultats, les auteurs ont effectué des simulations, à l'aide du logiciel MATLAB, afin de dépolluer le réseau de la SBEE en vue de réduire les pertes sur le réseau et par voie de conséquence réduire le coût de consommation chez les abonnés. Une estimation de l'énergie non distribuée a été faite sur la région nord du Bénin. Les données recueillies auprès de la SBEE permettent d'apprécier ce point sur l'ensemble du pays. Réduire cette énergie non distribuée et améliorer la forme d'onde permettraient d'accroître la qualité du service et par voie de conséquence de contribuer à la réduction de la pauvreté du peuple béninois afin d'atteindre les Objectifs du Millénaire pour le Développement

Reduction of the losses on the electric distribution network Low tension of the Beninese Company of Electrical energy (SBEE)

International audienceThe authors approached in this article, the problems of the losses on the distribution network of electrical energy of the Beninese Company of Electrical energy more precisely in district NVENOUMEDE and various approaches for their minimization. According to the international standards in force, the maximum voltage drop of a network should not exceed 10% of the nominal voltage. At the conclusion of measurements taken by the authors, the voltage drop is about 79,52% between phase and neutral and of 68,42 between phases. Thus, the network causes enormous nuisances to the subscribers and maintains a permanent conflict between supplier and consumers. The various approaches simulated by the authors made passed the voltage drop fall of phase from 79,52% to 10,75% and the losses active from 243 kW to 33 kW respectively variations of 86,5% and 92,12%

Regenerative braking in a small low cost plug-in hybrid electric vehicle for urban use

International audienceThis paper presents the design, the control and the experimental tests of an ultra-capacitor pack used as an energy storage system in a small hybrid electric vehicle. This design consists in calculating the capacitance and the power of the capacitors, which are necessary to store kinetic energy during deceleration of the vehicle and then to accelerate the vehicle. NEDC driving cycle is considered to achieve a realistic design. Then a simple control of the UC energy is proposed and it is validated with simulations using Portunus software. Finally,experimental tests are achieved to verify the design and the control of the UC pack in the real plug-in hybrid electric vehicle