Axial flux stator-water cooled disc type external rotor motor

Abstract

The invention provides an axial flux stator-water cooled disc type external rotor motor and relates to a motor for an automobile, in particular a pure electric and hybrid power automobile driving motor. The motor comprises a stator assembly st100, a driving end rotor assembly ro200, a non-driving end rotor assembly ro300, a rotary transformer re400 and a base fr500; a dual-rotor single-stator structure is adopted, wherein the rotors are of surface-mount structures; thermal management adopts a stator wheel hub liquid cooling and stator winding plastic encapsulation epoxy resin combined mode; and an electromagnetic scheme adopts an IP65 protection level. The axial flux stator-water cooled disc type external rotor motor of the invention has the advantages of high convection heat transfer efficiency, high heat transfer area, high thermal conduction speed, high power density, high torque density and compact structure, and is suitable for being used as a direct driver, matched differential mechanism or gearbox in fields such as pure electric and hybrid power automobiles. According to the axial flux stator-water cooled disc type external rotor motor, the power loss of a gearbox assembly and the complexity of a system can be decreased, and the efficiency and maintainability of the system can be improved.

Description

technical field [0001] The invention relates to an electric motor for automobiles, which is a drive electric motor for pure electric and hybrid electric automobiles. Background technique [0002] The motors used in the driving fields of pure electric vehicles 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. On the low side, it is limited to applications 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 vehicles and hybrid electric vehicles have high protection requirements for motors, and the installation space of the chassis is small. In this case, a large amount of...

AI Technical Summary

Problems solved by technology

[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 vehicles and hybrid electric vehicles have high protection requirements for motors, and the installation space of the chassis is small. In this case, a large amount of heat is generated. Considering the poor thermal conductivity of the air in the machine base, sometimes the heat exchange can not be dissipated in time only by the water cooling of the machine base or the water cooling of the end cover, which brings great challenges to the temperature rise of the motor.

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