CN214626539U - Stator core, stator winding and axial magnetic field motor - Google Patents
Stator core, stator winding and axial magnetic field motor Download PDFInfo
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- CN214626539U CN214626539U CN202120498237.2U CN202120498237U CN214626539U CN 214626539 U CN214626539 U CN 214626539U CN 202120498237 U CN202120498237 U CN 202120498237U CN 214626539 U CN214626539 U CN 214626539U
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Abstract
The utility model discloses a stator core, stator winding and axial magnetic field motor belongs to the motor technology field, stator core includes fan-shaped main part, the circumference both sides of fan-shaped main part bond and have the U-shaped board, the U-shaped board has the U-shaped groove that is used for holding stator coil, the U-shaped groove is followed the radial direction of fan-shaped main part extends. The utility model adopts the stator core with the split structure, which comprises a fan-shaped main body part and U-shaped plates adhered to the two sides of the circumference of the fan-shaped main body part, the fan-shaped main body part and the U-shaped plates have simple structures, can be manufactured by using simple dies, saves the die cost, has low cost and is very suitable for industrialization; compared with the prior art, the utility model, the thickness direction of its adhesive is perpendicular with the magnetic field direction, can not form second air gap, and then can not reduce performance such as efficiency, the torque of motor.
Description
Technical Field
The utility model relates to the technical field of electric machine, especially indicate a stator core, stator winding and 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 existing stator core of an axial magnetic field motor generally has the following two structural forms:
one form of construction is the one-piece form shown in fig. 2, which is generally i-shaped in its entirety and is typically pressed into one piece using SMC material, and includes a core block in the middle and pole pieces at either end of the core block. In the structure, a single stator tooth is of an integral structure, the geometric shape cannot be molded by using a simple die at one time, a more complex die is required for mold opening manufacturing, and the complex die is expensive; if a machining forming mode is adopted, the iron loss is greatly increased, and the performance of the motor is reduced.
The other structure form is a split structure form shown in fig. 3, namely, a single stator tooth is a (left and right) split combined structure, although the split structure form can be molded by a simple die at one time, the joint surfaces of the two split bodies are reinforced by using an adhesive, the adhesive is a non-magnetic conductive material, the thickness of the adhesive increases the axial air gap length of the motor, and further the efficiency of the motor is reduced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a can use simple and easy mould to make, with low costs, not reduce motor efficiency's stator core, stator winding and 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 core is provided, which includes a sector main body portion, and U-shaped plates are bonded to both circumferential sides of the sector main body portion, and each U-shaped plate has a U-shaped groove for accommodating a stator coil, and the U-shaped groove extends in a radial direction of the sector main body portion.
Furthermore, the edges of the left side and the right side of the plane opposite to the U-shaped plate of the fan-shaped main body part are provided with first step parts, and the U-shaped plate is provided with first seam allowances matched with the first step parts.
Further, the size of the first step part is 4-8mm multiplied by 35-40 mm.
Further, the depth of the U-shaped groove is 4-8 mm.
In another aspect, a stator winding is provided, which includes a stator core and a stator coil wound on the stator core, where the stator core is the above-mentioned stator core.
On the other hand, the axial magnetic field motor comprises a shell, wherein a stator assembly and two rotor assemblies positioned on two axial sides of the stator assembly are arranged in the shell, the stator assembly comprises a stator support, a plurality of stator windings are distributed in the circumferential direction of the stator support, and the stator windings are the stator windings.
Further, the stator support includes middle main part, is located integral type end cover of middle main part one side and is located the split type end cover of middle main part opposite side, wherein:
the middle main body part, the integrated end cover and the split end cover respectively comprise an inner ring, an outer ring and a plurality of connecting parts positioned between the inner ring and the outer ring, and through holes for placing the stator windings are formed between every two adjacent connecting parts;
the shape and size of the through hole of the middle main body part are matched with the shape and size of the stator winding so that the stator winding is in mutual contact with the stator winding after being placed, and the size of the through holes of the integrated end cover and the split end cover is smaller than that of the through hole of the middle main body part.
Furthermore, the size of the inner ring and the size of the outer ring of the middle main body part are the same as the size of the inner ring and the size of the outer ring of the integrated end cover, the width of the connecting part of the integrated end cover is larger than that of the connecting part of the middle main body part, so that second step parts are formed on two sides of the connecting part of the middle main body part, and a U-shaped plate of the stator core is provided with a second spigot matched with the second step parts.
Furthermore, the size of the inner ring and the size of the outer ring of the middle main body part are the same as the size of the inner ring and the size of the outer ring of the split type end cover, the width of the connecting part of the split type end cover is larger than the width of the connecting part of the middle main body part, so that the split type end cover is buckled on the middle main body part and then on the middle main body part, third step parts are formed on two sides of the connecting part of the middle main body part, and a U-shaped plate of the stator core is provided with a third spigot matched with the third step parts.
Furthermore, a plurality of first threaded holes are formed in the end faces of the inner ring and the outer ring of the middle main body part, first through holes matched with the first threaded holes are formed in the split type end cover, and first bolts are arranged in the first through holes.
The utility model discloses following beneficial effect has:
the stator core, the stator winding and the axial magnetic field motor of the utility model adopt the stator core with a split structure, which comprises the fan-shaped main body part and the U-shaped plates bonded on the two sides of the circumference of the fan-shaped main body part, the fan-shaped main body part and the U-shaped plates have simple structures, can be manufactured by using simple dies, saves the die cost, has low cost and is very suitable for industrialization; compared with the prior art, the utility model, the thickness direction of its adhesive is perpendicular with the magnetic field direction, can not form second air gap, and then can not reduce performance such as efficiency, the torque of motor.
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 in an integrated structure according to the prior art, in which (a) is a front view, (b) is a side view, and (c) is a perspective view;
fig. 3 is a schematic structural view of a stator core in a split structure form in the prior art, in which (a) is a front view, (b) is a side view, and (c) is a perspective view;
fig. 4 is a schematic structural view of a sector main body portion in a stator core according to the present invention, wherein (a) is a front view, (b) is a side view, (c) is a top view, and (d) is a perspective view;
fig. 5 is a schematic structural diagram of a U-shaped plate in a stator core according to the present invention, wherein (a) is a front view, (b) is a side view, (c) is a top view, and (d) is a perspective view;
fig. 6 is a schematic structural diagram of a stator core according to the present invention, in which (a) is a front view, (b) is a top view, and (c) is a perspective view;
fig. 7 is a schematic structural diagram of a stator winding according to the present invention, wherein (a) is a front view, (b) is a side view, (c) is a top view, and (d) is a perspective view;
fig. 8 is a schematic structural view of a stator assembly in an axial field motor according to the present invention, wherein (a) is a perspective view, (b) is a front view of one end face, (c) is a front view of the other end face, and (d) is a sectional view taken along a direction of a-a;
fig. 9 is a schematic structural view of the middle body portion (including the integral end cap) of the stator assembly shown in fig. 8, wherein (a) is a front view of one end face, (b) is a front view of the other end face, (c) is a cross-sectional view taken along the direction E-E, (d) is a perspective view, and (E) is a partially enlarged view in (b);
FIG. 10 is a structural schematic diagram of a split end cap of the stator assembly of FIG. 8, wherein (a) is a front view and (b) is a perspective view;
fig. 11 is a perspective view of the axial magnetic field motor of the present invention;
fig. 12 is a cross-sectional view of the axial field motor of the present invention.
In the figure, 1 stator iron core, 2 stator winding, 4 stator support, 5 locknut, 6 hollow shaft, 7 rotor disc, 71 rotor yoke, 72 permanent magnet, 8 front bearing, 9 rear bearing, 10 rotor disc connecting piece, 14 rotating assembly, 15 locknut, 16 water inlet and outlet, 17 three-phase binding post, 3121 fastening nut.
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 present invention provides a stator core 1, as shown in fig. 4 to 6, including the fan-shaped main body 11, the U-shaped plate 12 is bonded to both sides of the circumference of the fan-shaped main body 11, the U-shaped plate 12 has a U-shaped groove 121 for accommodating the stator coil, and the U-shaped groove 121 extends along the radial direction of the fan-shaped main body 11 (i.e., the length direction of the U-shaped groove 121 is parallel to the radial direction of the fan-shaped main body 11).
The stator core of the utility model adopts a split structure, which comprises a fan-shaped main body part and U-shaped plates adhered to the two sides of the circumference of the fan-shaped main body part, the manufacture of the fan-shaped main body part and the U-shaped plates is the same as the prior art, the SMC material is still adopted for press forming, the structure of the fan-shaped main body part and the U-shaped plates is simple, the simple mold can be used for manufacturing, the mold cost is saved, the cost is low, and the stator core is very suitable for industrialization; compared with the prior art, the utility model, the thickness direction of its adhesive is perpendicular with the magnetic field direction, can not form second air gap, and then can not reduce performance such as efficiency, the torque of motor.
In order to fix the sector-shaped main body 11 and the U-shaped plate 12, first step portions 111 may be disposed on left and right edges of a plane of the sector-shaped main body 11 opposite to the U-shaped plate 12, and the U-shaped plate 12 may be provided with first notches 122 engaged with the first step portions 111. The size of the first step portion 111 is preferably 4 to 8mm × 35 to 40mm, and specifically may be 4mm × 35 mm. The depth of the U-shaped groove 121 is preferably 4mm to 8mm, and specifically may be 4 mm.
On the other hand, the utility model provides a stator winding, as shown in fig. 4-7, including stator core 1 and the stator coil 2 of winding on stator core 1, stator core 1 is foretell stator core, because stator core's structure is the same with last, so no longer give consideration to here again.
The stator winding adopts the stator core with the split structure, and comprises the fan-shaped main body part and the U-shaped plates bonded on the two sides of the circumference of the fan-shaped main body part, the fan-shaped main body part and the U-shaped plates have simple structures, can be manufactured by using a simple die, saves the die cost, has low cost, and is very suitable for industrialization; compared with the prior art, the utility model, the thickness direction of its adhesive is perpendicular with the magnetic field direction, can not form second air gap, and then can not reduce performance such as efficiency, the torque of motor.
In another aspect, the utility model provides an axial magnetic field motor, as shown in fig. 8-12, including the shell, be equipped with a stator module in the shell and be located two rotor subassemblies of stator module axial both sides, stator module includes stator support 4, and a plurality of stator winding 2 have been laid to stator support 4's circumferencial direction, and stator winding 2 is foretell stator winding, because stator winding's structure is the same with last, and this is no longer repeated here.
The axial magnetic field motor adopts the stator core with a split structure, and comprises the fan-shaped main body part and the U-shaped plates bonded on the two sides of the circumference of the fan-shaped main body part, the fan-shaped main body part and the U-shaped plates have simple structures, can be manufactured by using a simple die, saves the die cost, has low cost, and is very suitable for industrialization; compared with the prior art, the utility model, the thickness direction of its adhesive is perpendicular with the magnetic field direction, can not form second air gap, and then can not reduce performance such as efficiency, the torque of motor.
In the prior art, the axial positioning of the stator winding (i.e. the stator core and the stator coil) usually needs to be fixed by using a pouring sealant at the outer diameter of the stator support, the heat conductivity coefficient of the pouring sealant is low, the thermal resistance is increased, the heat dissipation of the motor is seriously affected, and the continuous power can be greatly reduced under the same insulation and temperature resistance conditions. To avoid this problem, the stator frame 4 preferably adopts the following structure:
as shown in fig. 8 to 10, the stator holder 4 includes a middle body portion 41, an integrated end cover 42 on one side of the middle body portion 41, and a split end cover 43 on the other side of the middle body portion 41, wherein:
the middle main body part 41, the integrated end cover 42 and the split end cover 43 respectively comprise an inner ring, an outer ring and a plurality of connecting parts (distributed along the radial direction) positioned between the inner ring and the outer ring, and through holes for placing stator windings are formed between every two adjacent connecting parts (one stator winding is placed in each through hole);
the shape and size of the through hole of the middle main body part 41 are adapted to the shape and size of the stator winding (the shape is the same, the size is the same or slightly larger than the stator winding) so that the stator winding is placed in the middle main body part and the stator winding are in contact with each other, and the size of the through hole of the integrated end cover 42 and the size of the through hole of the split end cover 43 are smaller than that of the through hole of the middle main body part 41 so as to block the stator winding at the end face and prevent the stator winding from being separated.
Therefore, the stator winding is axially fixed on the stator support in an end cover mode, the effect of fixing the stator winding can be achieved without using pouring sealant or even with little pouring sealant, and the stator winding is more environment-friendly; and because no pouring sealant is used, the thermal resistance cannot be increased, and the heat dissipation of the motor cannot be influenced.
Preferably, as shown in fig. 7, the size of the inner ring and the outer ring of the middle body portion 41 is the same as the size of the inner ring and the outer ring of the integrated end cap 42, the width of the connecting portion of the integrated end cap 42 is greater than the width of the connecting portion of the middle body portion 41, so that second step portions 421 are formed at two sides of the connecting portion of the middle body portion 41, and the U-shaped plate 12 of the stator core 1 is provided with the second notches 123 matched with the second step portions 421, so that the stator winding can be prevented from coming off from the side of the integrated end cap 421 by matching the second step portions 421 with the second notches 123;
and/or the size of the inner ring and the size of the outer ring of the middle main body part 41 are the same as the size of the inner ring and the size of the outer ring of the split-type end cover 43, the width of the connecting part of the split-type end cover 43 is greater than the width of the connecting part of the middle main body part 41, so that third step parts (not shown) are formed on two sides of the connecting part of the middle main body part 41 after the split-type end cover 43 is buckled on the middle main body part 41, and a third spigot 124 matched with the third step parts is arranged on the U-shaped plate 12 of the stator core 1, so that the stator winding can be prevented from being separated from the side where the split-type end cover 43 is located by adopting the third step parts and the third spigot 124 to be matched.
Like this, through the extrusion fit of second step portion and third step portion respectively with second tang and third tang, still can play the effect of adjusting the planar flatness of pole shoe and depth of parallelism, but strengthening structural strength guarantees that the air gap is at reasonable within range, and then ensures motor stable performance.
In order to fix the split-type end cover 43 conveniently, a plurality of first threaded holes 411 may be formed in end faces of the inner ring and the outer ring of the middle main body portion 41, a first through hole 431 matched with the first threaded holes 411 is formed in the split-type end cover 43, and a first bolt 432 is arranged in the first through hole 431.
The utility model discloses well stator module's assembly process can refer to as follows:
firstly, the first step part of the fan-shaped main body part and the first spigot of the U-shaped plate are oppositely bonded, so that a stator core (figure 6) is assembled, then the stator coil is wound along the U-shaped groove, so that a stator winding (figure 7) is assembled, the stator winding is sequentially inserted into the through hole in the circumferential direction of the stator support, and finally the split type end cover is fixed, so that the whole stator assembly (figure 8) is obtained through assembly.
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 core is characterized by comprising a sector main body part, wherein U-shaped plates are bonded to two circumferential sides of the sector main body part, each U-shaped plate is provided with a U-shaped groove for accommodating a stator coil, and the U-shaped grooves extend in the radial direction of the sector main body part.
2. The stator core according to claim 1, wherein the fan-shaped main body portion and the U-shaped plate have first stepped portions at left and right edges of a plane opposite to each other, and the U-shaped plate has first notches fitted to the first stepped portions.
3. The stator core according to claim 2, wherein the first step portion has a size of 4-8mm x 35-40 mm.
4. The stator core according to claim 2, wherein the U-shaped slots have a depth of 4-8 mm.
5. A stator winding comprising a stator core and a stator coil wound around the stator core, wherein the stator core is the stator core according to any one of claims 1 to 4.
6. An axial magnetic field motor, comprising a housing, wherein a stator assembly and two rotor assemblies located at two axial sides of the stator assembly are arranged in the housing, the stator assembly comprises a stator support, a plurality of stator windings are distributed in the circumferential direction of the stator support, and the stator windings are the stator windings according to claim 5.
7. The axial field electric machine of claim 6, wherein the stator frame includes a middle body portion, an integral end cap on one side of the middle body portion, and a split end cap on the other side of the middle body portion, wherein:
the middle main body part, the integrated end cover and the split end cover respectively comprise an inner ring, an outer ring and a plurality of connecting parts positioned between the inner ring and the outer ring, and through holes for placing the stator windings are formed between every two adjacent connecting parts;
the shape and size of the through hole of the middle main body part are matched with the shape and size of the stator winding so that the stator winding is in mutual contact with the stator winding after being placed, and the size of the through holes of the integrated end cover and the split end cover is smaller than that of the through hole of the middle main body part.
8. The axial magnetic field motor of claim 7, wherein the inner ring and the outer ring of the middle main body portion have the same size as the inner ring and the outer ring of the integrated end cap, the connecting portion of the integrated end cap has a width greater than that of the connecting portion of the middle main body portion, so that second step portions are formed at both sides of the connecting portion of the middle main body portion, and a U-shaped plate of the stator core is provided with a second spigot which is matched with the second step portions.
9. The axial magnetic field motor of claim 8, wherein the inner ring and the outer ring of the middle main body portion have the same size as the inner ring and the outer ring of the split-type end cap, and the width of the connecting portion of the split-type end cap is greater than the width of the connecting portion of the middle main body portion, so that third step portions are formed on both sides of the connecting portion of the middle main body portion after the split-type end cap is fastened on the middle main body portion, and a U-shaped plate of the stator core is provided with a third spigot which is matched with the third step portions.
10. The axial magnetic field motor of claim 9, wherein the end faces of the inner ring and the outer ring of the middle main body portion are provided with a plurality of first threaded holes, the split end cover is provided with first through holes matched with the first threaded holes, and the first through holes are internally provided with first bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120498237.2U CN214626539U (en) | 2021-03-09 | 2021-03-09 | Stator core, stator winding and axial magnetic field motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120498237.2U CN214626539U (en) | 2021-03-09 | 2021-03-09 | Stator core, stator winding and axial magnetic field motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214626539U true CN214626539U (en) | 2021-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120498237.2U Active CN214626539U (en) | 2021-03-09 | 2021-03-09 | Stator core, stator winding and axial magnetic field motor |
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| Country | Link |
|---|---|
| CN (1) | CN214626539U (en) |
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2021
- 2021-03-09 CN CN202120498237.2U patent/CN214626539U/en active Active
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