Rotor rotating electric machine provided with at least one cladding element of a magnet inside a corresponding cavity

The invention focuses on a rotor (10) rotating electric machine, particularly an electric turbo-charger, comprising: - a rotor body (11) defining a plurality of cavities (21), - a magnet assembly permanent (22) accommodated in said cavities (21), characterized in that: - at least one cladding element (51) is interposed between said rotor body (11) and a permanent magnet (22) corresponding to ensure maintenance a permanent magnet (22) and is arranged so that said plating element (51) is located in the passage of the magnetic flux generated by said permanent magnet (22) corresponding.