Disc type axial-flux motor with oil-immersed circularly cooled stator and segmented armatures

Abstract

The invention discloses a disc type axial-flux motor with an oil-immersed circularly cooled stator and segmented armatures. A framework with double rotors and single stator is adopted; and a main shaft is designed. Each rotor adopts a magnetic steel surface-mounting type structure; and a whole stator oil-immersion circulation cooling and heat dissipation mode is adopted for temperature rise management. The disc type axial-flux motor with the oil-immersed circularly cooled stator and the segmented armatures comprises a stator assembly, a driving end rotor assembly, a non-driving end rotor assembly, a wire outlet box assembly and a rotary transformer assembly. An engine base is provided with an oil inlet joint and an oil outlet joint, both of which can carry out oil-immersion circulation cooling for the stator and have the advantages such as high convective heat transfer efficiency, big heat exchange area and fast heat transfer speed. The disc type motor adopting such a heat dissipation structure can achieve higher power density and higher torque density, is more compact in structure and is suitable for the occasions with strict requirements on the motor mounting space in future.

Description

technical field [0001] The invention belongs to the driving field of pure electric and hybrid electric vehicles, and in particular relates to an axial magnetic flux disk motor with a stator immersed in oil for circulation cooling and a segmented armature. Background technique [0002] The motors used in the drive fields of pure electric and hybrid electric 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 biased. 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 inst...

AI Technical Summary

Problems solved by technology

[0002] The motors used in the drive fields of pure electric and hybrid electric 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 biased. 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 and other working conditions. , generating a large amount of heat, considering that the thermal conductivity of the air in the machine base is relatively poor, and there is an assembly gap between the water channel of the machine base or the water channel of the end cover and the stator core, resulting in a large thermal conduction resistance, sometimes only by the water cooling of the machine base or the end cover Water cooling for heat exchange often cannot be dissipated in time, which brings great challenges to the management of motor temperature rise

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