Rotor for an electric machine, electric machine for a vehicle, and vehicle

A rotor for an electric machine, comprising:

• a rotor lamination stack divided into a plurality of sectors;
• a permanent magnet assembly arranged in each of the plurality of sectors and including two permanent magnets positioned in a V-shape symmetrically with respect to a plane of symmetry dividing each of the plurality of sectors into two half-sectors,
• wherein an outer radius (r) of the rotor lamination stack in each of the plurality of sectors has a first pair of local minimum values, symmetrically to one another with respect to the plane of symmetry, at first positions,
• the outer radius (r) of the rotor lamination stack in each of the plurality of sectors increases from each of the first positions to a boundary between two of the plurality of sectors adjacent to one another and has a first local maximum value at the boundary between two of the plurality of sectors adjacent to one another,
• a maximum value (Rmax) of the outer radius (r) over each of the plurality of sectors is situated on the plane of symmetry,
• the outer radius (r) of the rotor lamination stack in each of the plurality of sectors has a second pair of local minimum values, symmetrically to one another with respect to the plane of symmetry, at second positions positioned between the first positions in a circumferential direction,
• the outer radius (r) of the rotor lamination stack in each of the plurality of sectors decreases from the plane of symmetry to each of the second positions to have each of the second pair of local minimum values, and
• the outer radius (r) of the rotor lamination stack in each of the plurality of sectors decreases from the boundary between two of the plurality of sectors adjacent to one another to each of the first positions to have each of the first pair of local minimum values.