CN214958924U

CN214958924U - Axial magnetic motor stator

Info

Publication number: CN214958924U
Application number: CN202121252529.4U
Authority: CN
Inventors: 李栋; 张梓梁; 童飞遥
Original assignee: Wuhan Polytechnic Tongyu Xinyuan Power Co ltd
Current assignee: Wuhan Polytechnic Tongyu Xinyuan Power Co ltd
Priority date: 2021-06-04
Filing date: 2021-06-04
Publication date: 2021-11-30
Anticipated expiration: 2031-06-04

Abstract

The utility model relates to an axial flux motor stator and a manufacturing method thereof, the axial flux motor stator comprises a fixed supporting component, a segmented iron core and a stator coil, the fixed supporting component comprises an upper plate, a lower plate and a connecting cylinder, one end of the connecting cylinder is fixedly connected with the lower plate, the other end is detachably connected with the upper plate, the lower plate is provided with a lower mounting groove, the upper plate is provided with an upper mounting groove in a one-to-one correspondence manner, two ends of the segmented iron core are respectively inserted into the upper mounting groove and the lower mounting groove, and the stator coil is wound on the side surface of the segmented iron core; each segmented iron core comprises a middle part and iron core segments fixedly connected with two side faces of the middle part respectively. Implement the embodiment of the utility model provides a, following beneficial effect has: the sectional iron core of the axial flux motor stator is manufactured in a combined mode, a silicon steel sheet and an SMC (sheet molding compound) material are used, the electromagnetic performance of the sectional iron core is higher than that of the sectional iron core which is made of the SMC material only, and the utilization rate of the iron core is higher than that of the laminated iron core which is made of the laminated iron core only.

Description

Axial magnetic motor stator

Technical Field

The utility model relates to a motor stator technical field especially relates to an axial flux motor stator.

Background

The stator core of the axial flux motor is divided into an integral core and a segmented core, wherein the segmented core is mainly used. At present, the segmented core is generally formed by stacking a plurality of silicon steel sheets with different cross-sectional sizes or by integrally forming SMC (Soft Magnetic Composites). The method of laminating the silicon steel sheets with different section sizes is adopted, and because more types of the silicon steel sheets with different specifications are needed, more molds with different specifications are needed, so that the process difficulty is increased; although the SMC integral forming method can meet the requirement of structural forming, the SMC material has poor electromagnetic performance, low magnetic conductivity and large loss.

A manufacturing method of segmentation iron core as in CN111756125A, this utility model provides a segmentation iron core forms the segmentation iron core appearance with two soft magnetic sleeves of SMC after piling up the silicon steel sheet through multiple different cross sectional dimensions, then a plurality of segmentation iron cores splice into complete stator core through fixture, though this method can effectively fix the segmentation iron core and satisfy the requirement of performance, but the structural component is too complicated, needs multiple different cross sectional dimensions's silicon steel sheet, and the technology degree of difficulty is great.

According to the manufacturing method of the segmented iron core disclosed in CN111181261A, the bottom plate, the stator teeth and the magnetic conduction blocks of the segmented iron core in the utility model can be independently manufactured and then assembled into the axial flux motor stator, the stator teeth can be formed by laminating multiple layers of silicon steel sheets or integrally formed by SMC materials, the manufacturing difficulty of the stator iron core is reduced by the method, but gaps among the segmented iron cores are distributed in a fan shape, the gaps are too large, and the motor process density is lower.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to provide an axial flux motor stator to solve the technical problems in the prior art that the manufacturing process of the stator manufactured by silicon steel sheets through lamination is complicated, and the electromagnetic performance of the stator manufactured by SMC through integral molding is poor.

The utility model provides an axial flux motor stator, this axial flux motor stator includes: the stator coil is wound on the side face of the segmented iron core; each segmented iron core comprises a middle part and iron core segments fixedly connected with two side faces of the middle part respectively.

Furthermore, both ends of the segmented iron core are fan-shaped, and the shape and the size of the upper mounting groove and the shape and the size of the lower mounting groove are respectively matched with those of both ends of the segmented iron core.

Furthermore, the cross section of the middle part is an isosceles triangle, the cross section of the iron core section is a rectangle, and the iron core section is attached to the side face where the waist of the isosceles triangle is located and is fixedly connected with the middle part.

Further, the intermediate member is bonded or riveted to the core segment.

Furthermore, the connecting cylinder is of a cylindrical structure, the upper plate and the lower plate are correspondingly provided with an upper circular through hole and a lower circular through hole, and two ends of the connecting cylinder are respectively communicated with the upper through hole and the lower through hole.

Further, the lower mounting grooves are arranged into a circle and are arranged around the connecting cylinder at equal intervals.

Further, the core segment is formed by stacking a plurality of silicon steel sheets.

Further, the material of the intermediate member is SMC.

Furthermore, the upper plate and the lower plate are provided with connecting holes for connecting with a motor shell.

Compared with the prior art, this axial flux motor stator's segmentation iron core adopts the silicon steel sheet pressfitting of same cross sectional dimension to form iron core section and SMC integrated into one piece's structure combination, cuts apart the appearance that will be difficult for processing, obtains complicated structure appearance through the form of combination, because the silicon steel sheet uses same cross sectional dimension, only needs the mould of a silicon steel sheet admittedly, greatly reduced the cost that the silicon steel sheet was made: the segmented iron core is simple in structure, and the manufacturing process difficulty of the segmented iron core is reduced;

the segmented iron core is manufactured in a combined mode, the silicon steel sheet and the SMC are used simultaneously, the electromagnetic performance of the segmented iron core is higher than that of the SMC material, and the utilization rate of the iron core is higher than that of the laminated iron core.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, and to implement the technical means according to the content of the description, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is an exploded view of an axial flux motor stator provided by the present invention;

fig. 2 is an exploded view of the segmented core of fig. 1;

fig. 3 is a flowchart of a method for manufacturing an axial flux motor stator according to the present invention.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

Referring to fig. 1 and 2, the axial flux motor stator includes a fixing support assembly, a segment core 2, and a stator coil 3, wherein the stator coil 3 is wound around the segment core 2 to form a winding core, and the fixing support assembly is used for connecting and fixing the winding core.

The fixed supporting component comprises an upper plate 11, a lower plate 12 and a connecting cylinder 13, one end of the connecting cylinder 13 is fixedly connected with the lower plate 12, and the other end of the connecting cylinder is detachably connected with the upper plate 11. Lower mounting grooves are formed in the lower plate 12, upper mounting grooves are formed in the upper plate 11 in a one-to-one correspondence mode, the two ends of the segmented iron core 2 are inserted into the upper mounting grooves and the lower mounting grooves respectively, and the fixed supporting assembly clamps the segmented iron core 2 from the two ends. The stator coil 3 is wound on the side surface of the segmented iron core 2 and forms a winding iron core with the segmented iron core 2. The upper plate 11 and the lower plate 12 are provided with connecting holes for connecting with a motor shell.

In this embodiment, in order to facilitate the installation of the rotor, the connecting cylinder 13 is preferably a cylindrical structure, and circular upper and lower through holes are correspondingly formed in the upper plate 11 and the lower plate 12, and two ends of the connecting cylinder 13 are respectively communicated with the upper and lower through holes to form a cylindrical cavity. For better electrical performance, the lower mounting grooves are arranged in a circle, equally spaced around the connecting cylinder 13. Namely, the distances from each lower mounting groove to the connecting cylinder 13 are equal, and the distances between two adjacent lower mounting grooves are also equal. Because the upper mounting grooves correspond to the lower mounting grooves one by one, the upper mounting grooves are also arranged into a circle and are arranged around the connecting cylinder 13 at equal intervals.

In order to make the gap between two adjacent segment cores 2 uniform, the segment cores 2 preferably have a sector structure in cross section, and are arranged around the connecting cylinder 13. Correspondingly, go up the mounting groove and also be fan-shaped down the mounting groove to the size respectively with 2 both ends phase-matchs of segmentation iron core, make 2 both ends of segmentation iron core can just in time install in last mounting groove and lower mounting groove.

In order to reduce the difficulty of the manufacturing process of the segmented cores 2, in the present embodiment, each segmented core 2 includes a middle member 21 and core segments 22 fixedly connected to two side surfaces of the middle member 21. Wherein the cross section of middle part 21 is isosceles triangle, and the cross section of iron core section 22 is the rectangle, and iron core section 22 laminates the side at isosceles triangle's waist place and is connected with middle part 21 fixed connection. The fixing connection mode can adopt bonding or riveting.

In the present embodiment, the intermediate member 21 is integrally formed by SMC, and the core segment 22 is formed by stacking a plurality of silicon steel sheets. The silicon steel sheet and the SMC are combined, so that better electromagnetic performance and iron core utilization rate can be obtained.

Referring to fig. 3, the method for manufacturing the stator of the axial-flux motor includes the following steps: s1, stacking the silicon steel sheets to obtain the core segment 22, and integrally molding the core segment 21 with SMC material.

And S2, attaching the iron core segments 22 to two sides of the middle part 21 in an abutting mode, and performing pre-fastening in a bonding or riveting mode to obtain the segmented iron core.

And S3, winding the stator coil 3 on the segmented iron core, and then performing potting treatment on the segmented iron core to obtain a winding iron core.

S4, assembling and fixing the supporting component, so that two ends of the winding iron core are inserted into the upper mounting groove and the lower mounting groove to obtain the axial flux motor stator.

Implement the embodiment of the utility model provides a, following beneficial effect has: this axial flux motor stator's segmentation iron core adopts the silicon steel sheet pressfitting of same cross sectional dimension to form iron core section and SMC integrated into one piece's structure combination, cuts apart the appearance that will be difficult for processing, obtains complicated structure appearance through the form of combination, because the silicon steel sheet uses same cross sectional dimension, only needs the mould of a silicon steel sheet admittedly, greatly reduced the cost that the silicon steel sheet was made: the segmented iron core is simple in structure, and the manufacturing process difficulty of the segmented iron core is reduced;

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. An axial flux machine stator, comprising: the stator coil is wound on the side face of the segmented iron core; each segmented iron core comprises a middle part and iron core segments fixedly connected with two side faces of the middle part respectively.

2. The axial-flux motor stator according to claim 1, wherein both ends of the segment core are fan-shaped, and the upper mounting groove and the lower mounting groove have shapes and sizes respectively matched to both ends of the segment core.

3. The axial flux motor stator of claim 2, wherein the cross-section of the intermediate member is an isosceles triangle, the cross-section of the core segment is a rectangle, and the core segment is attached to a side surface where a waist of the isosceles triangle is located and is fixedly connected to the intermediate member.

4. The axial-flux electric machine stator of claim 3, wherein the intermediate member is bonded or riveted to the core segment.

5. The axial flux motor stator of claim 1, wherein the connecting cylinder has a cylindrical structure, the upper plate and the lower plate are correspondingly provided with circular upper through holes and circular lower through holes, and two ends of the connecting cylinder are respectively communicated with the upper through holes and the lower through holes.

6. The axial-flux electric machine stator of claim 5, wherein the lower mounting slots are arranged in a circle, equally spaced around the connecting cylinder.

7. The axial-flux electric machine stator of claim 1, wherein the core segments are formed from a plurality of silicon steel sheet stacks.

8. The axial-flux electric machine stator of claim 6, wherein the material of the intermediate member is SMC.

9. The axial flux motor stator of claim 1, wherein the upper plate and the lower plate have attachment holes formed therein for attachment to a motor housing.