Stator winding, stator with same, motor and vehicle

Abstract

The invention discloses a stator winding, a stator, a motor and a vehicle. The stator winding comprises a plurality of groups of winding branches. Each group of winding branches comprises two parallelbranches, and each branch comprises coils which are sequentially arranged on an iron core groove and are mutually connected in series. The coils between the two branches in each group of winding branches are arranged in the adjacent iron core grooves, each branch comprises a coil with a pitch of y + 1 and a coil with a pitch of y-1, and the pitches of the other coils are y. The coil with the pitch of y + 1 in one branch and the coil with the pitch of y-1 in the other branch in each group of winding branches are arranged in the adjacent iron core grooves and are located at the bottommost layerof the groove bottoms of the iron core grooves, and the coil with the pitch of y-1 in one branch and the coil with the pitch of y + 1 in the other branch in each group of winding branches are arranged in the adjacent iron core grooves and are located at the outermost layer of the groove openings of the iron core grooves. The stator winding has the advantages of ensuring the symmetry of each branch, simple and compact structure, simple assembly, small motor volume and the like.

Description

technical field [0001] The invention mainly relates to the technical field of motors, in particular to a stator winding, a stator having the same, a motor and a vehicle. Background technique [0002] With the rapid development of new energy vehicle technology, the drive motor, as one of the key executive components of electric vehicles, has higher and higher performance requirements. At present, high speed, light weight, and high efficiency have become the development trend of drive motors, and there are higher requirements for the power density, high efficiency area, and heat dissipation capacity of the motor. [0003] Among them, the stator winding can be divided into round wire and flat wire. Compared with the round wire winding, the flat wire winding can effectively improve the motor slot full rate, reduce the copper loss of the motor to improve the efficiency of the motor, and can also reduce the height of the end of the motor winding. , thereby reducing the size of th...

AI Technical Summary

Problems solved by technology

[0005] 1) There are many types of hairpin coils, and the arrangement method is complicated; a large number of bus bars and bus bars are required to connect the branches and center points of each phase winding, which will lead to the height of the winding end and increase the axial length of the motor;

[0006] 2) There are many special-shaped coils, and the existence of heterosexual coils will increase the difficulty of coil manufacturing, which is not conducive to mass production;

[0007]3) There is a problem of asymmetry in the winding branch, which will lead to differences in back EMF, resistance, inductance, etc., resulting in a decrease in motor performance, resulting in winding circulation, increasing Additional loss of the motor, causing local overheating of the motor

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