Rotor assembly for, e.g. rotary inner rotor permanent magnet machine, has pole piece held obliquely to radial direction extending web at rear end region while a web extends to magnetic yoke portion from radial center axis of pole piece

摘要

The rotor assembly (4) comprises two cylindrical segment pole pieces (42) for construction of the cylindrical rotor assembly by a magnetic yoke portion. A bag (6) for receiving a permanent magnet (7) is arranged between the pole shoes. One of the pole pieces is held obliquely to the radial direction extending web (43) at the rear end region (44), and at least one web extends to the magnetic yoke portion from the radial center axis of the pole piece. The pole pieces are held by the webs having successively tapering design and meet at the rear end region.