Eco-conception en génie électrique : application du critère énergétique sur cycle de vie à la machine asynchrone triphasée à cage d'écureuil

In this paper, we propose a life cycle design methodology on energy adapted to three-phase squirrel cage induction machine with variable power supply (voltage and frequency). It is therefore an eco-design, but on a single criterion, that is global energy on life cycle. We proceed to the optimization of the geometry through a genetic algorithm minimizing two contradictory objectives, the mass of raw materials (active parts) and the gross energy requirement. We compare at first these results with more "traditional" or economic optimizations (where only the operating losses are considered). This leads us to identify under what circumstances the impact of life cycle assessment becomes significant on the design of electromechanical converters. We observe that this impact is even more significant that the time of use of the machine is low compare to his total time of use. Methodologically speaking, it becomes then necessary to take into account the thermal transitional regime in the global modeling. Finally, we present a sensitivity study of the results before the specific energy costs in the calculation of the gross energy requirement.