| 摘要 |
A traction drive for an elevator comprises a sheave (5) for actuating a transmission means of the elevator and a synchronous motor, said synchronous motor comprising a stator (1) with at least one winding for generating a magnetic field rotating around a motor axis and a rotor (3) comprising at least one permanent magnet (7), the rotor being coupled to the sheave for transmitting a torque. The permanent magnet is longer in the motor axis direction than the stator core. The rotor is composed from a plurality of separate permanent magnets (7) and separate magnetic sectors (6) provided alternating in a circumferential direction perpendicular to the motor axis to concentrate the magnetic flux in axial and/or radial direction.
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