| 摘要 |
The rotor (1) according to the invention has a cylindrical overall shape and comprises a plurality of north poles (N) and south poles (S) which alternate and are formed from a plurality of permanent magnets (3, 4). The magnets are arranged in recesses (5, 6) extending along an axis (XX') of the rotor and are evenly distributed between a circumferential part (7) and a central part (6) of the magnetic mass (2) of the rotor so as to define a plurality of circumferential polar sections (10). According to the invention, each of the permanent magnets is made up of a main magnet (3) and of at least two auxiliary magnets (4) and the auxiliary magnets are arranged only between the circumferential part and an intermediate part (9) of the rotor extending between the circumferential part and the central part. According to one embodiment, the main magnet and the auxiliary magnets have substantially rectangular radial sections. Figure 1 |
