| 摘要 |
Permanent magnets (4) in the rotor interior, extend parallel to its rotational axis (X). At the longitudinal edges (8) of the permanent magnets, near the outer circumference of the rotor, outwardly-open grooves (6) are formed in the rotor body. Each groove is slanted or curved circumferentially, up to the longitudinal edges of the permanent magnets. In new design, the center line of each groove crosses the longitudinal edge of the adjacent permanent magnet. The grooves have less width at the outside of the rotor, than at a smaller radius. The cross section of the grooves is constant over the length of the rotor. An independent claim is included for the corresponding method of manufacture. |
