Energy-Efficient Motors

The problem of the increment of the equivalent efficiency of the huge electric motors family is very far from losing its increasing social importance [1]. We first refer to the natural ambition people have to increase the world's life quality. This is deeply dependent on the amount of the electrical energy at disposal per inhabitant, which is also strictly connected to the utilization of electric motors [2] (see Figure 1). In fact, such a parameter can be considered as a sort of "well-being" index, where more disposal of electric energy may allow for more richness and life quality. In Figure 1, the energy consumed per inhabitant per year is reported as a function of an index depending on the personal income; the results are sorted by nations and by continents. The diagrams clearly suggest that the gross domestic product (GDP) increment of a country is in correlation with the increase of the electric energy consumption (2006). © 2008 IEEE.