Permanent magnet rotors

摘要

In a first aspect, the invention provides a permanent magnet rotor for an electrical machine having a stator and a rotor and an air gap arranged between the rotor and the stator. The rotor has a rotor body configured for rotating around a central rotational axis and further comprises permanent magnets that are inserted in a magnetic material. The magnets have an inner end and an outer end, the outer end of the magnet being arranged in the proximity of the air gap at the circumference of the rotor delimiting the air gap, and at least a portion of the outer end of the permanent magnets is not covered by the magnetic material.