Stator liquid cooling structure for built-in disc type motor

Abstract

The invention discloses a stator liquid cooling structure for a built-in disc type motor. The stator liquid cooling structure includes a stator assembly, a stator core, a driving end bearing block, a non-driving end bearing block and a support skeleton, wherein the stator core is formed by radial overlying of silicon steel plates, and utilizes stator yoke-free design; stator windings sleeve the outer wall surface of the stator core, and plastically package epoxy resin; a snake-shaped coolant gallery is arranged between the support skeleton and the non-driving end bearing block; and a liquid coolant inlet and a liquid coolant outlet are also arranged between the support skeleton and the non-driving end bearing block. The stator liquid cooling structure for a built-in disc type motor enables the stator windings of the stator assembly to use epoxy resin to realize plastic packaging, so that the heat conduction coefficient is improved, and utilizes the snake-shaped coolant gallery to communicate with st115 liquid coolant to remove the heat. The disc type motor using the stator can have a higher grade of temperature rising resistance, and can bear greater overload and become more compact in the structure.

Description

technical field [0001] The invention relates to a motor in the field of pure electric and hybrid electric vehicles, in particular to a stator liquid cooling structure of a built-in disc motor. Background technique [0002] The motors used in the field of pure electric and hybrid vehicles are mostly AC permanent magnet synchronous motors, DC motors or AC asynchronous motors with radial flux. Due to the large axial installation size of traditional radial motors, the power density and efficiency are low. , which is not conducive to the application in the field of electric vehicles with strict space requirements and high efficiency requirements. [0003] Conventional water-cooled motors generally adopt a single cooling form such as water-cooled machine base or a small number of end cover water-cooled, while pure electric and hybrid electric motors require high protection levels, the chassis installation space is small, and the motor is used in acceleration, overtaking, climbing ...

AI Technical Summary

Problems solved by technology

[0002] The motors used in the field of pure electric and hybrid vehicles are mostly AC permanent magnet synchronous motors, DC motors or AC asynchronous motors with radial flux. Due to the large axial installation size of traditional radial motors, the power density and efficiency are low. , which is not conducive to the application in the field of electric vehicles with strict space requirements and high efficiency requirements

[0003] Conventional water-cooled motors generally adopt a single cooling form such as water-cooled machine base or a small number of end-cap water-cooled, while pure electric and hybrid electric motors require high protection levels, the chassis installation space is small, and the motors are used in acceleration, overtaking, climbing and other working conditions , generating a large amount of heat. Considering the relatively poor thermal conductivity of the air in the machine base, sometimes only relying on the water cooling of the machine base or the end cover to exchange heat often cannot be dissipated in time, which brings great challenges to the temperature rise of the motor.

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