Rotor, Synchronous Machine And Hybrid Drive

A rotor for a three-phase permanent-magnet-excited synchronous machine, the synchronous machine having a stator, the rotor comprising:

• a circumferential face facing the stator;
• a plurality of magnetic poles disposed to induce a voltage in the stator upon rotation of the rotor;
• a magnetic field generated by said magnetic poles having a field strength, along a circumferential coordinate of the rotor, with a profile formed from a superimposition of a sinusoidal basic function and sinusoidal harmonics of the basic function, the sinusoidal basic function having a period corresponding to a pole pitch of the rotor;
• a plurality of features selected from the group consisting of slot recesses formed in said circumferential face of the rotor and cavities formed below said circumferential face of the rotor, said features having a longitudinal extent following an axial extent of the pole pitch of the rotor and extending transversely with respect to their longitudinal extent along the circumferential coordinate in a region of the maximum values of the third harmonic and outside a region of the maximum values of the basic function.