Electric motors, powertrains and equipment

Abstract

Embodiments of the present application provide an electric motor, a power assembly, and equipment. By forming a plurality of first oil passages between the inner surface of the housing and the outer surface of the stator core, the stator core The second oil channel is formed at the root of the coil slot, which realizes the purpose of double-layer oil passage on the outer surface of the stator core and the root of the coil slot of the stator core, and ensures effective cooling of the stator core and coil windings. After the cooling oil is injected from the oil injection port, the flow direction of the cooling oil in part of the second oil passage is opposite to that of the remaining part of the second oil passage, which realizes the staggered reverse flow, makes the axial temperature of the stator core and the coil winding more uniform, and ensures that the motor operates at low speed. The heat dissipation requirement under the condition of high torque and high speed solves the problem of overheating of the coil winding caused by the poor heat dissipation of the stator core and coil winding in the existing motor under the condition of low speed, high torque and high speed.

Description

technical field [0001] The embodiments of the present application relate to the technical field of motors, and in particular to a motor, a power assembly and equipment. Background technique [0002] The motor is an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. Its main function is to generate driving torque as a power source for electrical appliances or various machines. With the miniaturization of the motor in the powertrain, the power density of the motor is gradually increasing, and with the increase of the power density of the motor, improving the heat dissipation efficiency and heat dissipation capacity of the motor has become an urgent technical problem to be solved. [0003] At present, the motor mainly includes a shell, a stator core, a rotor, and a coil winding. Usually, there are structural parts at both ends of the stator core. The structural parts and the shell form a seal...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a motor, power assembly and equipment, which achieves the purpose of double-layer oil passage on the outer surface of the stator core and the root of the coil slot of the stator core, and ensures effective cooling of the stator core and coil windings , so as to ensure the heat dissipation requirements of the motor under low-speed, high-torque and high-speed conditions, and solve the problem of poor heat dissipation of the stator core and coil winding in the existing motor, which causes the coil winding of the motor to be easily damaged under low-speed, high-torque and high-speed conditions overheating problem

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