The invention relates to a permanent
magnetism motor and concretely relates to a permanent
magnetism traction motor for subway. The problems of poor cooling performance, a limited range of application, poor
operational reliability, a complex structure and a large column of a present permanent
magnetism motor are solved. The permanent magnetism
traction motor for subway comprises a front end cover, a back end cover, a front bearing, a back bearing, a front bearing cover, a back outer bearing cover, a
stator structure, and a rotor structure. The rotor structure comprises a rotation shaft, a rotor iron core, a front rotor clamping ring, a back rotor clamping ring, a circular nut, a front permanent
magnet baffle plate, a back permanent
magnet baffle plate, a front permanent
magnet baffle plate clamping ring, and a back permanent magnet baffle plate clamping ring. A main cooling air path structure is formed by an axial direction air inlet, an axial direction air vent, an axial direction exhaust vent. An auxiliary cooling air path structure is formed by a ventilation chamber. A leading-out wire, horizontal heat radiating ribs are a
rotary transformer are also comprised. The invention is suitable for a subway driving
system.