The invention relates to a traction
machine, in particular to a
magnetic gear speed-regulating permanent-
magnet synchronous traction
machine. The traction
machine comprises a base, a main shaft, an outer rotor motor
assembly, a
magnetism adjusting iron core and a
magnetism adjusting outer rotor, wherein the main shaft is arranged on the base, and the outer rotor motor
assembly is provided with anouter rotor motor
stator fixed on the main shaft and an outer rotor motor rotor arranged on the outer side of the outer rotor motor
stator and arranged on the main shaft through a first bearing; and the
magnetism adjusting iron core is arranged on the outer side of the outer wall of the outer rotor motor rotor, and the magnetism adjusting outer rotor is arranged on the outer side of the outer circumference of the magnetism adjusting iron core. According to the
magnetic gear speed-regulating permanent-
magnet synchronous traction machine, the motor and a
magnetic gear are both of an outer rotorstructure, so that the size of the
stator is reduced, and the use of an enameled wire is reduced; and meanwhile, the mandrel only plays a role of bearing and mounting, does not participate in
torque transmission, and the torque output by the motor is directly transmitted to a traction wheel through the magnetic gear rotor, so that the
torque transmission is more direct, the longitudinal length ofthe main shaft is reduced, and the overall size and weight are reduced.