CN219843472U

CN219843472U - Hairpin motor stator

Info

Publication number: CN219843472U
Application number: CN202321126054.3U
Authority: CN
Inventors: 叶新
Original assignee: Yueke Intelligent Manufacturing Wuxi Co ltd
Current assignee: Yueke Intelligent Manufacturing Wuxi Co ltd
Priority date: 2023-05-10
Filing date: 2023-05-10
Publication date: 2023-10-17
Anticipated expiration: 2033-05-10

Abstract

The utility model relates to a hairpin motor stator, which comprises a stator body, wherein a plurality of iron core slots are annularly arranged in the stator body, a winding positioned in each iron core slot is arranged in the stator body, the winding consists of a plurality of wires, each wire comprises a plurality of straight-line segments, the number of the wires of the winding is the same as that of the iron core slots, and the number of the straight-line segments of each wire is the same as that of the straight-line segments required to be placed in each iron core slot; the utility model has the advantages of reducing welding spots and reducing the height of the welding end.

Description

Hairpin motor stator

Technical Field

The utility model belongs to the technical field of hairpin motor stators, and particularly relates to a hairpin motor stator.

Background

Compared with the traditional wound motor, the Hairpin permanent magnet synchronous motor is gradually applied on a large scale in the domestic driving motor market, and the motor is smaller in size and higher in power under the same power due to the flat characteristic of the Hairpin copper wire, so that the motor is the development direction of the next generation new energy driving motor.

The Chinese patent with the bulletin number of CN217935250U discloses a stator winding, a stator and a motor, wherein the stator winding comprises a stator and a stator winding, a stator core of the stator is provided with 48 conductor grooves along the circumferential direction, the pole number of the stator is 8 poles, the phase number is three, each phase is provided with two branches and the two branches are connected in parallel, the stator winding comprises a first wire hairpin and a second wire hairpin with the same pitch, the two branches of each phase adopt the second wire hairpin as the starting position of winding, the first wire hairpin is used for winding in a wave winding mode, and the winding direction is along; when the stator winding is used, the stator winding only adopts the first wire hairpin and the second wire hairpin, so that the stator winding is easy to distinguish in the winding process of the stator winding; and pitch that first wire hairpin and second wire hairpin are the same, and consequently be difficult for makeing mistakes when the wire winding can reach the purpose that improves machining efficiency, but first wire hairpin and second wire hairpin among this technical scheme still need be through welded connection formation return circuit because one end, and the high ratio of its welded end send out card end height and can be more than 10mm for the higher of welded end height.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the hairpin motor stator with reduced welding spots and reduced welding end height.

The technical scheme of the utility model is as follows:

the stator of the hairpin motor comprises a stator body which is annularly provided with a plurality of iron core grooves, wherein a winding positioned in each iron core groove is arranged in the stator body and consists of a plurality of wires, each wire comprises a plurality of straight-line sections, two ends of each wire are provided with open sections positioned on the straight-line sections, the number of wires of the winding is the same as that of the iron core grooves, and the number of the straight-line sections of each wire is the same as that of the straight-line sections inserted into the iron core grooves;

the number of slots of each pole of the stator body is taken as the pitch of the straight-line segments of the same wire, the slot layers of the straight-line segments of the same wire positioned in the iron core slots are added one by one in the circumferential direction, the straight-line segments at two ends of the wire are respectively arranged at the innermost layer and the outermost layer of the iron core slots, two open segments of the wire with the number of slots of the iron core slots at intervals are welded, and two straight-line segments connected with the two open segments welded together are respectively positioned at the outermost layer and the innermost layer of the iron core slots.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model adopts the wire composed of a plurality of straight line segments to form the winding, and the two straight line segments of the wire with the same winding and the interval of the slot number of the iron core are welded, thereby forming the winding of one phase of the hairpin motor, reducing the welding spots of the winding and lowering the height of the welding end;

in a word, the utility model has the advantages of reducing welding spots and reducing the height of welding ends.

Further, the stator body comprises a shell, an outer iron core and an inner iron core, wherein the outer iron core and the inner iron core are arranged in the shell, the iron core groove is formed in the outer iron core, and the winding is arranged in the iron core groove and is in contact with the inner iron core.

Further, the outer iron core is divided into a plurality of block-type iron cores along the axial direction of the outer iron core from the middle position of the iron core groove, and each block-type iron core side is provided with an iron core groove.

Further, the wire is wavy.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view illustrating a structure in which the outer core of fig. 1 is not mounted in a housing according to the present utility model;

FIG. 3 is a schematic view of the outer core and windings of FIG. 2 according to the present utility model;

FIG. 4 is a schematic diagram of the wire of FIG. 3 according to the present utility model;

FIG. 5 is a schematic top view of the structure of FIG. 1 of the present utility model;

FIG. 6 is a U-phase winding diagram of FIG. 1 according to the present utility model;

FIG. 7 is a diagram of the V-phase winding of FIG. 1 in accordance with the present utility model;

FIG. 8 is a diagram of a W-phase winding of FIG. 1 in accordance with the present utility model;

FIG. 9 is a diagram of the overall winding of FIG. 1 in accordance with the present utility model;

FIG. 10 is a 48 slot 8 layer 8 pole winding diagram of the present utility model;

FIG. 11 is a 48-slot 10 layer 8 pole winding diagram of the present utility model;

FIG. 12 is a 54 slot 6 layer 6 pole winding diagram of the present utility model;

FIG. 13 is a 54 slot 8 layer 6 pole winding diagram of the present utility model;

FIG. 14 is a 54 slot 10 layer 6 pole winding diagram of the present utility model;

FIG. 15 is a 72 slot 6 layer 8 pole winding diagram of the present utility model;

FIG. 16 is a 72 slot 8 layer 8 pole winding diagram of the present utility model;

fig. 17 is a 72 slot 10 layer 8 pole winding diagram of the present utility model.

In the figure, 1, a shell, 2, an outer iron core, 3, an inner iron core, 4, a winding, 5, a wire, 51, a straight line segment, 52, an open segment, 6, an iron core slot, 7, a loop, 8, a welding point, 9 and a lead-out wire.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-17, a hairpin motor stator comprises a stator body which is annularly provided with a plurality of iron core slots 6, wherein a winding 4 positioned in each iron core slot 6 is arranged in the stator body, each winding 4 consists of a plurality of wires 5, each wire 5 comprises a plurality of straight-line sections 51, both ends of each wire 5 are provided with open sections 52 positioned on the straight-line sections 51, the number of the wires 5 of each winding 4 is the same as that of the iron core slots 6, and the number of the straight-line sections 51 of each wire 5 is the same as that of the straight-line sections 51 to be placed in each iron core slot 6;

the straight line sections 51 of the same wire 5 are arranged on the innermost layer and the outermost layer of the iron core slot 6 respectively by taking the slot number of each pole of the stator body as the pitch, the straight line sections 51 of the same wire 5 are arranged on the slot layer of the iron core slot 6 one by one in the circumferential direction, the straight line sections 51 at the two ends of the wire 5 are respectively arranged on the innermost layer and the outermost layer of the iron core slot 6, two open sections 52 of the wire with the slot number of the iron core slot 6 at intervals are welded, and the two straight line sections 51 connected by the two welded open sections 52 are respectively arranged on the outermost layer and the innermost layer of the iron core slot 6;

the three-phase windings of the motor are U, V, W three phases respectively, taking the U-phase as an example (as shown in fig. 6), and the arrangement positions of the straight line segments 51 of one wire 5 in the U-phase windings are as follows: layer 1 of slot 1, layer 2 of slot 7, layer 3 of slot 13, layer 4 of slot 19, layer 5 of slot 25, layer 6 of slot 31,

the two straight line segments 51 of the wires with the number of slots 6 of the iron core slot of the same winding 4 are welded, for example, the straight line segment 51 of the 6 th layer of the 31 st slot where one wire 5 is positioned is welded with the straight line segment 51 of the 1 st layer of the 37 th slot of the other wire 5;

as shown in fig. 6-17, the stator body may specifically be a 48-slot 6-layer 8-pole, a 48-slot 8-layer 8-pole, a 48-slot 10-layer 8-pole, a 54-slot 6-layer 6-pole, a 54-slot 8-layer 6-pole, a 54-slot 10-layer 6-pole, a 72-slot 6-layer 8-pole, a 72-slot 8-layer 8-pole, and a 72-slot 10-layer 8-pole, and the stator body may also be other non-specified slot numbers and layer numbers.

In this embodiment, the stator body includes a housing 1, an outer core 2 and an inner core 3 disposed in the housing 1, a core slot 6 is located on the outer core 2, the outer core 2 is separated into a plurality of segmented cores along the axial direction of the outer core 2 from the middle position of the core slot 6, and each segmented core side is provided with a core slot 6, and a winding 4 is disposed inside the core slot 6 and contacts with the inner core 3;

the specific processing process is as follows:

1. taking out the copper wire from the coil, and processing the copper wire into a wire 5 through the working procedures of straightening, paint removing, cutting, forming and the like, wherein if m layers of copper wires are arranged in each iron core slot 6 of the outer iron core 2, the single wire 5 is provided with m straight-line segments 51;

2. when the product has n iron core slots 6, n wires 51 are sequentially placed on an arc-shaped tool, and the straight line segments of each wire 5 are sequentially stacked at intervals of 1 slot;

3. winding all the wires 5 on the inner core by a winding device;

4. the outer iron core 2 is inserted into the winding 4 along the radial direction, the outer iron core 2 is a segmented iron core, and n/2 segmented iron cores are combined into a complete circular outer iron core 2;

5. the shell 1 is thermally sleeved on the outer iron core 2, so that the outer iron core 2 is firmly fixed due to thermal expansion and cold contraction after the shell 1 is cooled;

6. the lead wires 5 of the inner and outer rings are bent outwards along the radial direction, only the part of the outgoing line 9 is left to be vertical, and the lead wires 5 of the inner and outer rings are welded together through welding after bending, so that a loop is formed.

Through the process, each wire only needs to weld the straight line segments at the two ends with the straight line segments at the two ends of the adjacent wires, so that welding spots are reduced, and the height of a welding end is reduced.

In this embodiment, the wire 5 is formed into a cambered wavy wire by a die or other forms;

in this embodiment, the loop in fig. 6 represents 1 pole and the winding in fig. 6 represents 8 poles.

Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing embodiments, or equivalents may be substituted for elements thereof; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a hairpin motor stator, includes the stator body that annular is provided with a plurality of iron core grooves, its characterized in that: the stator body is internally provided with a winding positioned in the iron core groove, the winding consists of a plurality of wires, each wire comprises a plurality of straight-line segments, both ends of each wire are provided with open segments positioned on the straight-line segments, the number of the wires of the winding is the same as that of the iron core groove, and the number of the straight-line segments of each wire is the same as that of the inserted straight-line segments of the iron core groove;

2. The hairpin stator of claim 1 wherein: the stator body comprises a shell, an outer iron core and an inner iron core, wherein the outer iron core and the inner iron core are arranged in the shell, the iron core groove is formed in the outer iron core, and the winding is arranged in the iron core groove and is in contact with the inner iron core.

3. The hairpin stator of claim 2 wherein: the outer iron core is divided into a plurality of block type iron cores along the axial direction of the outer iron core from the middle position of the iron core groove, and each block type iron core side is provided with an iron core groove.

4. The hairpin stator of claim 1 wherein: the lead is wavy.