DEVICE FOR CONVERTING MECHANICAL ENERGY INTO ELECTRICAL ENERGY

摘要

The invention relates to an energy conversion device (10), comprising: - first (20) and second (30) electrodes intended to be connected to the terminals of an electrical load (60); - an electret (40) placed opposite the first electrode (20), mounted movably with respect to the first electrode (20) according to a degree of freedom in a plane, so that a relative movement between the electret and the first electrode induces a difference in potential between the electrodes. Moreover: - the electret (40) comprises a continuous layer exhibiting a series of projections (42) extending along a direction (z) perpendicular to said plane, the projections being distributed with a pitch (P) which is smaller than the travel between the first electrode and the electret; - the first electrode (20) exhibits faces (21) opposite the electret, these faces being distributed with an identical pitch to the pitch of the projections of the electret.