Stator assembly, stator, motor and vehicle

Abstract

The invention discloses a stator assembly, a stator, a motor and a vehicle, the stator assembly 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; the head ends and the tail ends of the two branch circuits in each group of winding branch circuits are single coils, each branch circuit comprises a coil with a span of y, one branch circuit further comprises a coil with a span of y + 1, the other branch circuit further comprises a coil with a span of y-1, and the coils with the spans of y + 1 and y-1 are located at the midpoint positions of the two branch circuits respectively; and the coil with the span of y + 1 and the coil with the span of y-1 are arranged in the adjacent iron core groove on the outermost layer of the notch. 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

A stator assembly, stator, motor and vehicle technical field [0001] The present invention belongs to the technical field of electric motors, and in particular relates to a stator assembly, a stator having the same, an electric motor and a vehicle. Background technique With the rapid development of new energy vehicle technology, drive motor as the heart of electric vehicle, its performance requirements Higher and higher. At present, high speed, light weight and high efficiency have become the development trend of drive motors, which has a great impact on the power density, High-efficiency area and heat dissipation capacity have higher requirements. The stator assembly 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. It can reduce the copper consumption of the motor and improve the efficiency of the motor. At the same time, it can also reduce the height of the motor windin...

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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