The invention concerns a rotor arrangement for an electrical drive motor
of a compressor, particularly a refrigerant compressor, with a rotor
having a rotor lamination of stacked sheet plates, and a shaft, which is
inserted in an axial recess of the rotor lamination and is unrotatably
connected with the rotor lamination, the recess being formed by openings
in adjacent sheet plates. It is endeavoured to simplify the manufacturing
of such rotor arrangements. For this purpose, it is ensured that openings
of different sizes are provided in the sheet plates, at least two sheet
plates forming a first group, each having an opening, which is smaller
than the cross-section of the shaft, the remaining sheet plates forming a
second group, each having an opening, which is larger than the
cross-section of the shaft.