Motor stator winding, stator, motor and vehicle

Abstract

The invention discloses a motor stator winding, a stator, a motor and a vehicle, the motor stator winding comprises three phases of phase windings, each phase winding comprises a plurality of groups of parallel winding branches, each group of winding branches comprises two parallel branches, and each branch comprises a plurality of coils which are sequentially arranged on a circumferential iron core groove of a stator iron core and are mutually connected in series; each of the two branches comprises m coils with the span of y + 1 and n coils with the span of y-1, and the spans of the other coils are y; in the two branch circuits, the coil with the span being y + 1 and the coil with the span being y-1 are arranged on the outermost layer of the notch of the iron core groove, and the coil with the span being y + 1 in one branch circuit and the coil with the span being y-1 in the other adjacent branch circuit in each group of winding branch circuits are arranged in the adjacent iron core groove. The invention has the advantages of compact structure, balanced potential of each branch, no circulating current and the like, the line type is reduced, no special-shaped line exists, the complexity of the manufacturing process is reduced, and a series of problems caused by asymmetry of each branch are eliminated.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a stator winding of a motor, 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 the heart 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] The stator winding of the motor can be divided into round wire and flat wire. Compared with the round wire winding, the flat wire winding can effectively improve the full rate of the motor slot, reduce the copper loss of the motor and improve the motor efficiency, and can also reduce the height of the motor winding end. , thereby reducing the size of the motor and imp...

AI Technical Summary

Problems solved by technology

[0006] 1) There are many types of coils and the arrangement is complex; a large number of bus bars and bus bars are required to connect the branches and center points of the windings of each phase, resulting in an increase in the height of the winding ends and an extension of the axial length of the motor;

[0007] 2) More special-shaped coils are used, and the existence of special-shaped coils will increase the difficulty of coil manufacturing, which is not conducive to mass production;

[0008] 3) There is a problem of asymmetry in the winding branch, resulting in differences in back EMF, resistance, inductance, etc., resulting in reduced motor performance, winding circulation, increased additional loss of the motor, and easy to cause local overheating of the motor

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