Internal and external alternating type totally-closed water cooling structure applied to permanent magnet traction motor

Abstract

The invention relates to a totally-enclosed water cooling structure applied to a permanent magnet traction motor, and solves the heat dissipation problem of the motor when the boundary dimension is strictly limited and the torque output is large. According to the main scheme, a stator iron core of a full-lamination welding structure is adopted, and is composed of stator pressing rings at the two ends, a stator punching sheet and a pulling plate; cooling pipeline mounting holes are formed in four corners of the stator pressing rings and the stator punching sheet; and cooling pipelines are assembled in the mounting holes in the four corners of the corresponding stator iron core, are connected in series and welded, are arranged in a motor through specially designed gap bridge pipelines, and realize internal and external alternate transition connection of the motor so as to achieve the effect of cooling the stator iron core of the motor and the interior of the motor. According to the cooling structure, a traditional motor frame type engine base structure is canceled, the proportion and the arrangement position of a cooling water path are optimized, water paths are arranged at four corners without additionally increasing the boundary dimension of the motor, and under the condition that the boundary dimension of the motor is strictly limited, the armature diameter is effectively increased, the motor loss is reduced and the output torque is improved.

Description

technical field [0001] The invention relates to a cooling technology for a direct-drive permanent magnet traction motor in the rail transit field, in particular to an internally and externally alternating fully enclosed water-cooling structure applied to a permanent magnet traction motor. Background technique [0002] Compared with the traditional gearbox transmission technology, the direct drive technology of rail vehicles has the advantages of high transmission efficiency, simple transmission structure, and low maintenance cost. This technology connects the driving motor directly to the axle of the vehicle, and the traction motor directly drives the wheels, which reduces the transmission gearbox between the wheels and the axle, simplifies the driving structure of the locomotive, makes the vehicle more efficient, lighter in weight, and reduces noise. decrease. Therefore, direct-drive traction motors have gradually become one of the mainstream motors in the field of rail ve...

AI Technical Summary

Problems solved by technology

[0017] In order to solve the technical problem that the current motor has difficulty in heat dissipation when the external dimensions are strictly limited and the torque output is large, the present invention provides an internal and external alternating fully enclosed water cooling structure applied to permanent magnet traction motors

Images