PM ROTOR HAVING RADIAL COOLING SLOTS AND CORRESPONDING METHOD OF PRODUCTION

摘要

The invention relates to a PM rotor having radial cooling slots and to a corresponding method of production. The aim of the invention is to provide a structurally simple rotor which has a high degree of efficiency. According to the invention, the rotor consists a plurality of partial laminated stacks (20) that are interspaced in the axial direction at a defined distance, thereby defining radial cooling slots (22). Permanent magnets (24) are arranged in every partial laminated stack (20) in inner pockets (23). The dimensions of every permanent magnet (24) in the axial direction does not or only insignificantly exceed the axial dimensions of the respective partial laminated stack (20). During assembly, the permanent magnets (24) can be axially pushed through the inner pockets (23) to the respective partial laminated stack (20). The invention allows to provide a rotor comprising radial cooling slots and inner permanent magnets which has a very high degree of efficiency.