Patent ID: 8975800
Filing Date: 2015-03-10
Classification: H02K,Y10T

Abstract:
1. A rotor for an electric motor, the rotor comprising: a rotor shaft; a rotor core attached on the rotor shaft and having a plurality of core laminations arranged along an axis of the rotor core, and having a plurality of poles of at least one pole pair, each core lamination having a central recess, the rotor shaft passing through the central recess, the central recess having a contour as well as adjacent areas, and each core lamination having a plurality of receiving structures arranged at peripheral angular positions in order to each form a receiving element for a pole-forming element of the rotor core, the rotor core having a surface facing the rotor shaft, the surface being formed together with the adjacent areas of the central recess of the plurality of core laminations, and having uneven areas crosswise to the axis of the rotor core formed by the contours of the respective central recesses of respective core laminations of the plurality of core laminations, the contours of the respective central recesses of respective at least a first core lamination and a second core lamination of the plurality of core laminations being arranged so as not to be congruent with each other; the contours of the respective central recesses of the core laminations having an odd-numbered rotational symmetry and the plurality of receiving structures having an even-numbered rotational symmetry.