Rotor for electrical machine, comprises rotor laminations shaped to define hour glass shaped cavities in the rotor face which house laminated pole pieces and pairs of permanent magnets

摘要

The rotor of an electrical machine is made from laminations (4) each lamination having a central annular area (4e) and four peripheral sectors (4a,4b,4c,4d) which define hour glass shaped cavities (6). The cavities (6) house laminated pole pieces (7) and two pairs of flux concentrating permanent magnets (20a,20b,21a,21b) which are secured by the shape of the housing and pole piece