Reivindicaciones

1. CLAIMS1. Multi-rotor device with a polygonal structure for the utilization of marine currents, comprising a plurality of modular removable generating units (1) and a plurality of driving units (2) with floating and ballasting features, characterized in that the generating (1) and driving (2) units are supported by a three dimensional structure, consisting of lattice flat frames delimiting a polygonal profile in the sides and vertices of which the generating units and the driving units are provided, in alternate positions and separate to each other; the driving units of which feature enough floating and ballasting capability so as to generate the rotation of the three dimensional structure around a horizontal axis, by means of a ballasting variation of the driving units situated at each side of said horizontal axis. 2. 2. Device according to claim 1 characterized in that the driving units (2) are provided in the vertices (4) of the polygonal profile and the generating units (1) are provided in an intermediate point of the sides of the polygonal profile. 3. 3. Device according to claim 1 characterized in that the generating units (1) are provided in the vertices (4) of the polygonal profile and the driving units (2) are provided in an intermediate point of the profile sides 4. Device according to claim 1 characterized in that it comprises a central dome (7), situated in the geometrical centre of the polygonal profile, the dome of which is connected to the driving units (2) and/or to the generating units (1) by means of flat lattice structures.5. Device according to claims 1 and 4 characterized in that the central dome (7) and at least part of the driving units (2) and/or generating units (1) are provided with winches (9), whose anchoring cables (10) attach the device to the sea bed.6. Device according to claims 1 and 4 characterized in that at least part of the generating units (1) and/or driving units (2) are connected by means of respective cables (11) to a submerged rotating buoy (12) which, in turn, is attached to the sea bed through an anchoring system.7. Device according to claim 1 characterized in that the three dimensional structure has a hexagonal profile.8. Device according to claim 1 characterized in that the three dimensional structure has a square profile.