CN213341771U - Stator module and axial magnetic field motor - Google Patents

Stator module and axial magnetic field motor Download PDF

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Publication number
CN213341771U
CN213341771U CN202021904451.5U CN202021904451U CN213341771U CN 213341771 U CN213341771 U CN 213341771U CN 202021904451 U CN202021904451 U CN 202021904451U CN 213341771 U CN213341771 U CN 213341771U
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stator
core
block
coil
ring
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卞广伟
孙蕾
薛成勇
徐庆位
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Shandong Jingchuang Technology Research Institute Of Magnetoelectrics Industry Co ltd
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Shandong Jingchuang Technology Research Institute Of Magnetoelectrics Industry Co ltd
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Abstract

The utility model discloses a stator module and axial magnetic field motor, which belongs to the technical field of motors, the stator module comprises a stator support, a plurality of stator windings are arranged in the circumferential direction of the stator support, each stator winding comprises a stator core and a stator coil wound on the stator core, the stator core is in a block structure form and comprises two block-type core blocks, one end of each two core block is provided with a pole shoe, the other end is mutually abutted to form the stator core, and the stator coil is a forming coil; and inner fixing rings and outer fixing rings for fixing stator windings are arranged at the inner edge and the outer edge of the through hole on the two axial sides of the stator support. The utility model discloses can use the shaping coil, stator winding axial positioning is convenient, improves motor stator heat radiation structure, optimizes the radiating effect, promotes the sustained power.

Description

Stator module and axial magnetic field motor
Technical Field
The utility model relates to the field of electric machines, especially indicate a stator module and have this stator module's axial magnetic field motor.
Background
An axial magnetic field motor, also called an axial flux motor or a disc motor, has a stator assembly and a rotor assembly in a disc structure. The air gap of the axial magnetic field motor is planar, the air gap magnetic field is axial, and the axial magnetic field motor has the advantages of compact structure, small volume, light weight and high torque density.
Axial field motors generally have several configurations: 1. single rotor and single stator: a stator assembly and a rotor assembly (single sided air gap); 2. double-rotor single-stator: two rotor assemblies, one stator assembly (double-sided air gap) in the middle, also called an outer rotor axial magnetic field motor; 3. single rotor double stator: two stator assemblies, one rotor assembly in the middle (double-sided air gap); 4. multi-rotor multi-stator: a plurality of stator assemblies and a plurality of rotor assemblies are interleaved (multi-faceted air gap).
Fig. 1 shows a typical configuration of a yokeless, dual rotor, single stator, axial field machine comprising a stator assembly in the middle and rotor assemblies on either side, wherein: the stator assembly comprises a stator core 6', a stator coil 5' wound on the stator core 6', and a stator bracket 1' for fixing the stator core 6' and the stator coil 5', wherein the stator core 6' is usually made of Soft Magnetic Composite (SMC) to reduce eddy current loss; the rotor subassembly includes the magnet steel 4' that is located stator module both sides and sets up in pairs, sets up the rotor magnetic conduction board 3' at the magnet steel 4' back and sets up the rotor support 2' at rotor magnetic conduction board 3' back.
The conventional stator core of an axial magnetic field motor is generally in an integral structural form as shown in fig. 2, and the stator core is integrally formed in an i-shape by pressing an SMC material, and includes a core block located in the middle and pole shoes located at two ends of the core block. With respect to this integral structural form, the inventors found that the following technical problems exist:
(1) during winding, the stator core is required to be wound, and the formed coil and the stator core cannot be independently assembled, so that the assembly time is increased, the process is complex, and winding equipment is required to be added;
(2) the axial positioning of stator winding (stator core and stator coil promptly) need use the casting glue to fix in the external diameter department of stator support, and the casting glue coefficient of heat conductivity is low, can lead to the thermal resistance to increase, seriously influences the heat dissipation of motor to and under the equal insulating temperature resistant condition, continuous power can greatly reduced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can use the shaping coil, axial positioning is convenient, optimizes motor radiating effect's stator module and has this stator module's axial magnetic field motor.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
in one aspect, a stator assembly is provided, which includes a stator support, a plurality of stator windings are distributed in a circumferential direction of the stator support, each stator winding includes a stator core and a stator coil wound on the stator core, wherein:
the stator core is in a block structure form and comprises two block-type core blocks, one ends of the two block-type core blocks are provided with pole shoes, the other ends of the two block-type core blocks are mutually abutted to form the stator core, and the stator coil is a formed coil;
the stator support comprises an inner ring, an outer ring and a plurality of connecting parts positioned between the inner ring and the outer ring, through holes for placing the stator windings are formed between every two adjacent connecting parts, the shape and the size of each through hole are matched with those of the stator windings so that the stator windings are in contact with each other after being placed, and the depth of each through hole is consistent with the height of the stator windings; the inner ring, the outer ring and the connecting part are of an integrated non-ferromagnetic metal structure;
and inner fixing rings and outer fixing rings for fixing the stator winding are arranged at the inner edge and the outer edge of the through hole on the two axial sides of the stator support.
Furthermore, the inner annular surface and/or the outer annular surface of the pole shoe are/is provided with a first positioning protrusion, and a first notch matched with the first positioning protrusion is arranged in the through hole.
Furthermore, a first step part is arranged on the edge of the inner annular surface of the pole shoe, and an inner positioning spigot matched with the first step part is arranged on the end surface of the inner fixing ring;
and/or a second step part is arranged on the edge of the outer annular surface of the pole shoe, and an outer positioning spigot matched with the second step part is arranged on the end surface of the outer fixing ring.
Furthermore, two core blocks of the stator core are arranged on the end faces which are mutually abutted, one of the two core blocks is provided with a positioning column, and the other core block is provided with a positioning groove matched with the positioning column.
Further, the inner fixing ring and the outer fixing ring are fixed on the stator support through bolts.
Furthermore, heat-conducting glue is coated between the through holes and the stator winding, and the stator support is made of aluminum or copper.
In another aspect, an axial magnetic field motor is provided, which includes a stator assembly and two rotor assemblies located at two axial sides of the stator assembly, where the stator assembly is the above-mentioned stator assembly.
Furthermore, a stator shell is arranged outside the stator support, and a heat dissipation device is arranged on the stator shell.
Furthermore, a second positioning protrusion is arranged on the outer surface of the stator support, and a second notch matched with the second positioning protrusion is arranged on the inner surface of the stator shell.
Further, the inner ring part of the stator support is provided with a cooling channel.
The utility model discloses following beneficial effect has:
the utility model discloses a stator module and axial magnetic field motor can use the shaping coil, and stator winding axial positioning is convenient, improves motor stator heat radiation structure, optimizes the radiating effect, promotes continuous power.
Drawings
Fig. 1 is a schematic view showing a typical structure of a prior art yokeless type axial field motor;
fig. 2 is a schematic structural view of a stator core of a conventional axial-field motor, in which (a) is a side elevation view and (b) is a sectional view taken along a line a-a;
fig. 3 is a schematic structural view of a single segment of a stator core in a stator assembly according to the present invention, wherein (a) is a front view of one end face, (b) is a front view of the other end face, (c) is a sectional view taken along a direction of a-a, and (d) is a perspective view;
fig. 4 is a schematic view of the overall structure of the stator core in the stator assembly of the present invention, in which (a) is an end face elevation, (B) is a sectional view from a-a direction, (c) is a sectional view from B-B direction, and (d) is a perspective view;
fig. 5 is a schematic structural view of a stator winding in a stator assembly according to the present invention, wherein (a) is an end surface elevation, (b) is a sectional view taken along the direction a-a, and (c) is a perspective view;
fig. 6 is a schematic structural view of a stator bracket in a stator assembly according to the present invention, wherein (a) is an end surface elevation, (b) is a sectional view taken along the direction of a-a, and (c) is a perspective view;
fig. 7 is a schematic structural view of the single-sided inner and outer stator rings of the stator assembly of the present invention, wherein (a) is an end elevation, (b) is a sectional view taken along the direction a-a, (c) is a partial P1 enlarged view, (d) is a partial P2 enlarged view, and (e) is a perspective view;
fig. 8 is a schematic view of the overall structure of the stator assembly of the present invention, wherein (a) is an end face elevation, (b) is a sectional view taken along the direction of a-a, and (c) is a perspective view;
fig. 9 is a schematic view illustrating a connection structure of the stator assembly and the stator housing shown in fig. 8, in which (a) is an end surface elevation view and (b) is a sectional view taken along a-a direction.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
In one aspect, the utility model provides a stator module, as shown in fig. 3-8, including stator support 1, a plurality of stator winding 2 have been laid to the circumferencial direction of stator support 1, and stator winding 2 includes stator core 21 and the stator coil 22 of winding on stator core 21, wherein:
the stator core 21 is in a block structure form and comprises two block-type core blocks 211, one ends of the two block-type core blocks 211 are provided with pole shoes 212, the other ends of the two block-type core blocks 211 are mutually abutted to form the stator core 21, the two block-type core blocks 211 are preferably identical in size and symmetrical in shape, and the stator core 21 can be manufactured into blocks by pressing and integrally forming by using SMC materials in the prior art; the stator coil 22 is a molded coil;
the stator support 1 comprises an inner ring 11, an outer ring 12 and a plurality of connecting parts 13 (distributed along the radial direction) positioned between the inner ring 11 and the outer ring 12, through holes 14 (one stator winding is arranged in each through hole) for placing the stator windings 2 are formed between every two adjacent connecting parts 13, the shape and the size of each through hole 14 are matched with the shape and the size of each stator winding 2 (the shapes are the same, the sizes are the same or slightly larger than the stator windings), so that the stator windings 2 are mutually contacted after being placed, the depth of each through hole 14 is consistent with the height of each stator winding 2, the overall contact of the two is realized, and the heat conduction speed is improved; the inner ring 11, the outer ring 12 and the connecting part 13 are of an integrated non-ferromagnetic metal structure, and are preferably made of aluminum or copper and the like with good heat-conducting property and relatively low cost;
the inner fixing ring 3 and the outer fixing ring 4 for fixing the stator winding 2 are arranged at the inner edge and the outer edge of the through hole 14 on the two axial sides of the stator support 1, so that the stator winding 2 is axially fixed. The material of the inner fixing ring 3 and the outer fixing ring 4 is preferably the same as that of the stator support 1, and for the convenience of fixing, the inner fixing ring 3 and the outer fixing ring 4 can be fixed on the stator support 1 by bolts 5 (fig. 8), and 16 in fig. 6-7 are bolt holes for installing the bolts 5.
"interior" and "outer" be based on radially and decide with motor shaft's distance, radially be close to motor shaft and be "interior", radially keep away from motor shaft and be "outer".
When the stator core assembly is used, firstly, the two segmented core blocks of the stator core are inserted into two ends of the formed coil, so that the stator winding is assembled (figure 5), then the stator winding is inserted into the through hole of the stator support, and finally the stator winding is fixed on the stator support by the inner fixing ring and the outer fixing ring, so that the whole stator assembly is obtained (figure 8).
The utility model discloses following beneficial effect has:
(1) the utility model discloses can use the shaping coil to assemble, stator coil and stator core can separate the synchronous preparation, and assembly process is simple, reduces the automation equipment and uses, promotes production efficiency, reduce cost;
(2) the utility model adopts the inner fixing ring and the outer fixing ring to realize the axial fixation of the stator winding on the stator bracket, thus achieving the effect of fixing the stator winding without using pouring sealant or even using the pouring sealant very little, and being more environment-friendly; moreover, as no pouring sealant is used, the thermal resistance cannot be increased, so that the heat dissipation of the motor cannot be influenced;
(3) in the utility model, the stator support comprises an inner ring, an outer ring and a plurality of connecting parts positioned between the inner ring and the outer ring, a through hole for placing the stator winding is formed between two adjacent connecting parts, and the shape and the size of the through hole are matched with those of the stator winding, so that the stator winding is tightly matched with the through hole after the stator winding is installed in the through hole, thereby realizing the firm fixation of the stator winding; and because inner circle, outer lane and connecting portion formula metal construction as an organic whole, metal heat conduction is fast, so can take away the heat on the stator coil of stator winding fast.
To sum up, the stator assembly of the utility model can use the forming coil, the axial positioning of the stator winding is convenient, the heat dissipation structure of the motor stator is improved, the heat dissipation effect is optimized, and the continuous power is improved; and the stator support is the integral type metal material, and it is low to make the degree of difficulty, and the cost is controllable, and the technology is simple and convenient, and is fixed convenient to the stator winding, outwards conducts heat through metal itself, and the heat conduction is quick, takes away the heat on the stator coil more easily.
As shown in fig. 3 and 6, in order to prevent the stator winding 2 from being loosened and shaken in the circumferential direction in the through hole 14, the inner and/or outer annular surface of the pole piece 212 may be provided with first positioning protrusions 2121, 2122, and the through hole 14 is provided with first recesses 141, 142 which are engaged with the first positioning protrusions 2121, 2122. In order to fix the stator winding 2 in the radial direction, the inner annular surface edge of the pole shoe 212 may be provided with a first step part 2123, and the end surface of the inner fixing ring 3 is provided with an inner positioning spigot 31 matched with the first step part 2123; and/or, the outer annular surface edge of pole shoe 212 can be equipped with second step part 2124, the terminal surface of outer fixed ring 4 is equipped with outer location tang 41 with second step part 2124 matched with, like this through the extrusion fit of inside and outside location tang to step part, still can play the effect of adjusting the planar flatness and the depth of parallelism of pole shoe, but strengthening structure intensity guarantees that the air gap is in reasonable range, and then ensures motor stable performance.
As shown in fig. 3-4, the stator core 21 is in a form of a split structure, and in order to improve the combining firmness of the two core blocks 211, the two core blocks 211 are disposed on the end surfaces abutted against (i.e., opposite to) each other, one of the two core blocks 211 may be provided with a positioning post 2111, and the other one may be provided with a positioning groove 2112 matched with the positioning post 2111. Furthermore, as shown in the embodiment in the figure, positioning posts 2111 are provided on both the core blocks 211. In order to reduce the gap between the through hole 14 and the stator winding 2 and improve the heat conduction efficiency, heat-conducting glue can be coated between the through hole 14 and the stator winding 2.
On the other hand, the utility model provides an axial magnetic field motor, include a stator module and be located two rotor subassemblies of stator module axial both sides, stator module is foretell stator module, because the structure is the same with last, and here is no longer repeated.
The axial magnetic field motor of the utility model can use the formed coil, the stator winding is convenient to axially position, the heat dissipation structure of the motor stator is improved, the heat dissipation effect is optimized, and the continuous power is promoted; and the stator support is the integral type metal material, and it is low to make the degree of difficulty, and the cost is controllable, and the technology is simple and convenient, and is fixed convenient to the stator winding, outwards conducts heat through metal itself, and the heat conduction is quick, takes away the heat on the stator coil more easily.
In the utility model, the stator bracket can be used as the stator shell at the same time, and the stator shell does not need to be additionally arranged outside the stator bracket; in order to improve the manufacturing convenience, the stator frame may also be used as an element disposed in the stator housing, at this time, the stator housing 6 (as shown in fig. 9, an annular cylinder may be used to protect the internal devices and to perform a connection and fixing function to the outside) needs to be disposed on the stator frame 1, and a heat dissipation device (not shown) may be disposed on the stator housing 6, and after the heat is conducted to the stator frame 1, the heat is conducted to the heat dissipation device through the stator housing 6, so as to achieve heat dissipation. The heat sink can be air-cooled or oil-cooled. The outer surface of the stator frame 1 may be provided with a second positioning protrusion 15 (fig. 6), and the inner surface of the stator housing 6 may be provided with a second notch 61 matched with the second positioning protrusion 15, so as to facilitate the positioning connection of the stator frame 1 and the stator housing 6.
It will be appreciated that when the axial field motor is an internal rotor motor, the stator frame 1 may be arranged hollow within the inner ring 11 as shown in the embodiment of the figure; when the axial magnetic field motor is an outer rotor motor, an inner ring part of the stator support 1, namely the inner ring 11, may be thickened, and cooling channels (cooling medium may be oil, water, glycol, etc.) may be distributed in the thickened part, and the cooling channels may be arc-shaped and arranged in the stator support 1 in a reciprocating manner in the circumferential direction.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A stator component comprises a stator support, a plurality of stator windings are distributed in the circumferential direction of the stator support, the stator windings comprise a stator core and a stator coil wound on the stator core, and the stator component is characterized in that,
the stator core is in a block structure form and comprises two block-type core blocks, one ends of the two block-type core blocks are provided with pole shoes, the other ends of the two block-type core blocks are mutually abutted to form the stator core, and the stator coil is a formed coil;
the stator support comprises an inner ring, an outer ring and a plurality of connecting parts positioned between the inner ring and the outer ring, through holes for placing the stator windings are formed between every two adjacent connecting parts, the shape and the size of each through hole are matched with those of the stator windings so that the stator windings are in contact with each other after being placed, and the depth of each through hole is consistent with the height of the stator windings; the inner ring, the outer ring and the connecting part are of an integrated non-ferromagnetic metal structure;
and inner fixing rings and outer fixing rings for fixing the stator winding are arranged at the inner edge and the outer edge of the through hole on the two axial sides of the stator support.
2. The stator assembly of claim 1, wherein the inner annular surface and/or the outer annular surface of the pole piece is provided with a first locating projection, and wherein the through hole is provided with a first notch therein for mating with the first locating projection.
3. The stator assembly according to claim 1, characterized in that the inner annular surface edge of the pole shoe is provided with a first step part, and the end surface of the inner fixing ring is provided with an inner positioning spigot matched with the first step part;
and/or a second step part is arranged on the edge of the outer annular surface of the pole shoe, and an outer positioning spigot matched with the second step part is arranged on the end surface of the outer fixing ring.
4. The stator assembly of claim 1, wherein the two core blocks of the stator core are provided with positioning columns on the end surfaces which are abutted against each other, and the other core block is provided with positioning grooves matched with the positioning columns.
5. The stator assembly of claim 1, wherein the inner and outer stator rings are bolted to the stator frame.
6. The stator assembly according to any of claims 1-5, wherein a thermally conductive glue is applied between the through holes and the stator windings, and the stator frame is made of aluminum or copper.
7. An axial field machine comprising a stator assembly and two rotor assemblies axially disposed on opposite sides of said stator assembly, wherein said stator assembly is according to any one of claims 1 to 6.
8. The axial field electric machine of claim 7, wherein the stator frame is externally provided with a stator housing, and the stator housing is provided with a heat sink.
9. The axial field electric motor of claim 8, wherein the outer surface of the stator frame is provided with a second positioning protrusion, and the inner surface of the stator housing is provided with a second recess that mates with the second positioning protrusion.
10. The axial field electric machine of claim 7, wherein the inner ring portion of the stator frame is provided with cooling channels.
CN202021904451.5U 2020-09-03 2020-09-03 Stator module and axial magnetic field motor Active CN213341771U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021904451.5U CN213341771U (en) 2020-09-03 2020-09-03 Stator module and axial magnetic field motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021904451.5U CN213341771U (en) 2020-09-03 2020-09-03 Stator module and axial magnetic field motor

Publications (1)

Publication Number Publication Date
CN213341771U true CN213341771U (en) 2021-06-01

Family

ID=76102326

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021904451.5U Active CN213341771U (en) 2020-09-03 2020-09-03 Stator module and axial magnetic field motor

Country Status (1)

Country Link
CN (1) CN213341771U (en)

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