| 摘要 |
An air-gap diameter of a rotor of an electrical machine is arranged to have a con- cave axial profile or a bore diameter of a stator is arranged to have a convex axial profile so that the air-gap (107) of the electrical machine is substantially constant in the axial direction (z), even though the stator core is bent (130) by magnetic forces caused by a magnetic flux corresponding to the nominal use of the electrical machine. It is also possible to have both the concave rotor air-gap diameter profile and the convex stator bore diameter profile. Because of the concave rotor airgap diameter profile and/or convex stator bore diameter profile, a support structure (105) which is needed in large diameter electrical machines for supporting a stator core assembled of tangential segments can be allowed to be more flexible and thus savings in the weight of the support structure can be achieved. |
