Oil-cooled flat wire motor with cooling three-phase lead

Abstract

The invention discloses an oil cooling flat wire motor with a cooling three-phase lead, which comprises a casing, a front end cover and a rear end cover, the front end cover and the rear end cover are mounted at two ends of the casing, the front end cover and the rear end cover are hermetically connected with the casing to form a cooling oil cavity, a front bearing and a rear bearing are mounted on the front end cover and the rear end cover respectively, and a motor rotor penetrates into the front bearing and the rear bearing. An oil seal is arranged between the motor rotor and the front end cover, the stator iron core is fixed to the machine shell through interference and key groove positioning, the flat wire armature is embedded into the stator iron core, and the three-phase outgoing line and the flat wire armature guide ring are welded to the flat wire armature. According to the oil-cooled flat wire motor, the modes of cooling oil spraying, spraying, soaking and the like are adopted, the motor end winding, the motor stator iron core, the motor three-phase outgoing line and the high-speed bearing for the motor are cooled and lubricated, the cooling efficiency is improved, the product stability is improved, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of electric motors, and more specifically relates to an oil-cooled flat-wire electric motor with cooling three-phase lead wires. Background technique [0002] In the "New Energy Vehicle Industry Development Plan 2021-2035", by 2025, the power density of passenger car motors should reach >4kW / kg, and the torque density of commercial vehicle motors should reach >19N m / kg. To develop in the direction of high power density and high torque density, these are closely related to the heat dissipation method of the motor. Efficient heat dissipation can improve the continuous power, continuous torque, and peak torque duration of the motor. [0003] At present, the three-phase lead wires of motors on the market are mostly in the form of multi-strand round wires, round braided copper wires, and flat braided copper wires. The lead-out wires are all resistance-welded with the terminals, and the resistance of the we...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the above-mentioned deficiencies in the prior art, to provide an oil-cooled flat-wire motor with cooling three-phase leads, through cooling oil spraying, spraying, soaking, etc. , motor three-phase lead-out wires, and motor high-speed bearings for cooling and lubrication; at the same time, flat wire motors are used to make up for the defects of low filling rate of round wire coils, long winding ends, poor heat dissipation, large copper loss, and poor winding rigidity to achieve more High slot fill rate, higher efficiency, better heat dissipation performance, smaller size and lower cost

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