Résumé
We extend to the linearly piezoelectric case the mathematical derivation of the linearly elastic behavior of a plateas the limit behavior of a three-dimensional solid whose thickness 2e tends to zero. Due to classical assumptionson the exterior loadings, a suitable scaling is defined by to study the limit behavior as e goes to 0. Note that theassumptions on the forces are those which provide Kirchhoff-Love limit plate theory while those on the electricalloading involve an index p running over 1, 2 that will imply two kinds of limit models according to the nature andthe magnitude of the data. We show that the scaled states converge in a suitable topology to the unique solutionof the limit problem indexed by p. These limit problems (p = 1 or 2) are connected with the physical situationswhere the thin plate acts as an actuator or a sensor.