A STATOR AND A ROTOR FOR AN ELECTRIC MOTOR

摘要

A stator (2) and a rotor (4) suitable for use in an electric motor or generator. The stator comprises a plurality of stator coils (12) and a support (30) for holding the coils around a rotor of the motor. A cylindrical sleeve (16) is mounted radially inwardly on the support to form a barrier in use between cooling fluid passing over the coils and a rotor located within the stator. The rotor comprises a hub (73), a plurality of rotor segments (50,72), and a plurality of permanent magnets (56). The segments are arranged around the hub in a ring, with the permanent magnets disposed between the segments. A radially outwardly facing exposed surface (58)of each magnet is spaced radially inwardly from an outer cylindrical profile defined by the segments.