2. Basic electromechanical energy conversion processes

2.1 Classification of usable interaction phenomena

Any electromechanical energy conversion process relies on the exploitation of one or more physical phenomena to ensure the interdependence of the mechanical and electrical quantities associated with the two forms of energy involved. Thus, in the general case of an electro-magnetic-mechanical system capable of storing energy in the three corresponding forms, the possibility of electromechanical interaction is formally reflected by the presence, in the development of the Lagrangian (function of generalized coordinates and velocities), of "mixed" terms dependent simultaneously on mechanical and electromagnetic variables. Mechanical forces or impulses, obtained respectively by deriving the Lagrangian from mechanical coordinates or velocities,...