CN113872347B - Stator single tooth structure and assembled stator - Google Patents
Stator single tooth structure and assembled stator Download PDFInfo
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- CN113872347B CN113872347B CN202111131556.0A CN202111131556A CN113872347B CN 113872347 B CN113872347 B CN 113872347B CN 202111131556 A CN202111131556 A CN 202111131556A CN 113872347 B CN113872347 B CN 113872347B
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- 238000004804 winding Methods 0.000 claims abstract description 138
- 230000017105 transposition Effects 0.000 claims description 16
- 238000001125 extrusion Methods 0.000 claims description 15
- 230000015556 catabolic process Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 210000001503 joint Anatomy 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 238000009434 installation Methods 0.000 description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 7
- 238000003825 pressing Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
Abstract
The invention provides a stator single-tooth structure and an assembled stator, wherein the stator single-tooth structure comprises a fixing part, a winding part and a wire, wherein a connecting groove with an outward opening is formed in the fixing part, at least one side of the connecting groove is convexly provided with a protruding part, and the protruding part is used for limiting the position of the fixing part in the opening direction of the connecting groove; the winding part is arranged on the inner side of the fixing part and is used for winding; the wire is wound on the winding part to form a winding unit. The assembled stator comprises a plurality of stator groups forming an annular array structure, each stator group comprises two stator single-tooth structures, two stator single-tooth structures in one stator group are in butt joint along the axial path of the annular array structure, and connection is achieved through a connecting piece. The stator single-tooth structure and the assembled stator provided by the invention have the advantages that the production period is shortened during manufacturing, the cost of a die is greatly saved, and the winding accuracy is improved.
Description
Technical Field
The invention belongs to the technical field of permanent magnet motors, and particularly relates to a stator single-tooth structure and an assembled stator.
Background
The motor is a device for realizing electric energy and mechanical energy conversion, the stator is an important part in the motor, and the stator is stationary and mainly used for introducing three-phase symmetrical current into the three-phase symmetrical winding to generate a rotating magnetic field. The stator of the large motor is generally made into a sector structure, each sector is provided with a plurality of grooves, a stator core is formed by stacking one third of stator punching sheets or one half of stator punching sheets, for the ultra-high and ultra-large size of the stator of the large motor, the transportation and the installation are difficult, the manufacturing cost of the stator punching sheet mould is high, and the manufacturing period is long.
When the windings on the stator are multi-span windings, the upper and lower layer sides of the coil span a plurality of wire slots, in this case, the winding process is complex, and when the former winding is completed, interference can be generated on the latter winding process, and the use is affected by the error.
Disclosure of Invention
The embodiment of the invention provides a stator single-tooth structure and an assembled stator, which aim to simplify the winding process of the stator, improve the winding efficiency and the precision, and reduce the manufacturing cost and the manufacturing period of a die.
In a first aspect, an embodiment of the present invention provides a stator single tooth structure, including:
the fixing part is provided with a connecting groove with an outward opening, at least one side of the connecting groove is convexly provided with a protruding part, and the protruding part is used for limiting the position of the fixing part in the opening direction of the connecting groove;
the winding part is arranged on the inner side of the fixing part and is used for winding; and
and the wire is wound on the winding part to form a winding unit.
Compared with the prior art, the scheme disclosed by the embodiment of the application has the advantages that each stator single-tooth structure is independently manufactured, wound and installed, the production period is shortened during manufacturing, the production efficiency is improved, and the cost of a die is greatly saved; compared with the whole stator, the stator single-tooth structure is convenient to transport, space occupation is reduced, and transport cost is reduced; the installation sequence is not required to be limited during installation, so that the installation process is simplified; when in winding, each stator single-tooth structure is independently wound, the mutual winding process does not interfere, the stator single-tooth structure is connected with respective winding units after being installed, and the winding accuracy is improved.
With reference to the first aspect, in one possible implementation manner, the wire is wound in multiple turns along a radial direction of the stator to form a wire layer, and the wire layer is formed into multiple layers from inside to outside to form the winding unit;
the section of wire is rectangle, innermost the face that the long limit of section of wire corresponds laminating in the surface of wire winding portion, adjacent layer the face that the long limit of section of wire corresponds laminating each other.
In some embodiments, transposition portions are formed between adjacent wire layers, the transposition portions are uniformly distributed on a first side and a second side of the wire winding portion, the first side and the second side are oppositely arranged, and one of the first side and the second side is a lead-out side of the wire.
In some embodiments, transposition portions are formed between adjacent wire layers, and the transposition portions are located on a third side of the winding portion, wherein the third side is opposite to the wire leading-out side.
With reference to the first aspect, in one possible implementation manner, a breakdown preventing layer is disposed between adjacent wires.
With reference to the first aspect, in one possible implementation manner, a first insulating layer is wrapped on an outer surface of the winding unit, and a second insulating layer is covered on an outer ring surface of the winding unit, where the second insulating layer is located between the first insulating layer and the winding unit, or the first insulating layer is located between the second insulating layer and the winding unit;
the first insulating layer is used for insulating between the winding unit and the fixing part and between the winding unit and the winding part.
In a second aspect, an embodiment of the present invention further provides a split stator, including a plurality of stator groups that form an annular array structure, where each stator group includes two stator single-tooth structures described above, and two stator single-tooth structures in one stator group are butted along a circumferential path of the annular array structure, and are connected by a connecting piece;
the assembled stator is divided into two half parts, wherein the winding units on the stator single-tooth structure of one half part form a first wire group, the winding units on the stator single-tooth structure of the other half part form a second wire group, and the wire inlet end of the first wire group and the wire inlet end of the second wire group are mutually butted;
the connecting piece is provided with two extrusion parts which are oppositely arranged, one extrusion part is arranged in the stator group, the two extrusion parts are respectively arranged in the connecting grooves of the two fixing parts, and opposite extrusion forces are applied to the two fixing parts.
With reference to the second aspect, in one possible implementation manner, the stator single-tooth structure includes a plurality of sheet structures stacked in sequence along an axial direction of the annular array structure, two end plates are respectively disposed at two ends of the annular array structure in the axial direction, and two end plates are connected through a threaded connection member penetrating through a plurality of sheet structures.
In some embodiments, the end plate is an insulating member, and a round chamfer is arranged at an edge of the end plate corresponding to the position of the winding part.
With reference to the second aspect, in one possible implementation manner, in the same stator group, the protruding portion is disposed on a side surface of the connection slot near the abutting end of the two fixing portions, and the protruding portion is used for defining a position of the stator single-tooth structure in a radial direction of the annular array structure.
Drawings
Fig. 1 is a schematic perspective view of a stator single tooth structure according to a first embodiment of the present invention;
fig. 2 is a schematic cross-sectional view (front view) of a stator single tooth structure according to a first embodiment of the present invention;
FIG. 3 is a second schematic diagram of a winding process (side cross-sectional view) of a wire according to a first embodiment of the present invention;
fig. 4 is a schematic perspective view (without wires) of a stator single tooth structure according to a second embodiment of the present invention;
fig. 5 is a schematic front view of an assembled stator according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a front view of a stator assembly and a connector according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a prior art sequential connection method of stator wiring;
fig. 8 is a schematic diagram of reverse-order connection adopted by the split stator according to the embodiment of the present invention.
Reference numerals illustrate:
10-stator single tooth structure; 20-assembling type stators; 30-connecting piece;
11-a fixing part; 21-stator set; 31-an extrusion part;
111-connecting grooves; 22-a first wire set;
112-a projection; 23-a second wire set;
113-an avoidance space; 24-lamellar structure;
12-a winding part; 25-end plates;
13-conducting wires; 26-chamfering;
14-a winding unit;
15-line layers;
16-transposition part;
17-a first insulating layer;
18-a second insulating layer;
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to fig. 1 to 6, a stator single tooth structure 10 according to the present invention will be described. The stator single tooth structure 10 includes a fixing portion 11, a winding portion 12, and a wire 13, wherein the fixing portion 11 is provided with a connecting slot 111 with an opening facing outwards, at least one side of the connecting slot 111 is provided with a protruding portion 112 in a protruding manner, the protruding portion 112 is used for limiting the position of the fixing portion 11 in the opening direction of the connecting slot 111, and the winding portion 12 is arranged on the inner side of the fixing portion 11 and is used for winding; the wire 13 is wound around the winding portion 12 to form a winding unit 14.
Before the stator single-tooth structure 10 is installed, the wire 13 needs to be wound on each winding portion 12 to form a winding unit 14 on each stator single-tooth structure 10, then each stator single-tooth structure 10 is installed on the stator housing according to the winding unit 14 on the stator single-tooth structure 10, and a plurality of stator single-tooth structures 10 are distributed in an annular array to form a stator.
Referring to fig. 8, taking a 30-pole 36-slot winding as an example, the current inflow near the A1 end in the circumferential direction of A1, B1, and C1 is positive, and the current inflow near the X1 end is negative; a2, B2, and C2 are positive for current inflow near the A2 end and negative for current inflow near the X2 end in the circumferential direction:
A1:1,6，-7，-12，13,18；
A2：36,31，-30，-25,24,19；
B1:2，-3，-8,9,14，-15；
B2：-33,32,27，-26，-21,20；
C1：-4，5，10，-11，-16,17,；
C2：35，-34，-29,28,23，-22；
the winding of the wire 13 on each stator single tooth structure 10 is the same, then each stator single tooth structure 10 is mounted on the stator, the A1 corresponds to a winding unit 14 which needs to be connected at the positions of '1', '6', '7', '12', '13', '18', the right side of '1' is connected with the left side of '6', '6' is connected with the right side of '7', '12', '13', '18', and the other A2, B1, B2, C1 and C2 are all identical to the A1.
It will be appreciated that, in order to ensure the stability of the stator single tooth structure 10, the fixing portions 11 of two adjacent stator single tooth structures 10 are in contact with each other, but the winding portions 12 of two adjacent stator single tooth structures 10 are spaced apart, and the spacing between the two adjacent winding portions 12 is required to satisfy that after the winding units 14 are formed, the coils on the two winding portions 12 do not interfere (i.e. the coils wound by the winding units 14 with too little space are prevented from being insufficient).
Compared with the prior art, the stator single-tooth structure 10 provided by the embodiment is manufactured, wound and installed independently, so that the production period is shortened, the production efficiency is improved, and the cost of a die is greatly saved; compared with the whole stator, the stator single-tooth structure 10 is convenient to transport, reduces occupied space and lowers transport cost during transport; the installation sequence is not required to be limited during installation, so that the installation process is simplified; when in winding, each stator single-tooth structure 10 is independently wound, the winding processes of the stator single-tooth structure 10 are not interfered, the stator single-tooth structure 10 is connected with the winding units 14 after being installed, and the winding accuracy is improved.
In some embodiments, a specific wound form of the wire 13 may take the structure shown in fig. 2 to 3. Referring to fig. 2 to 3, the wire 13 is wound in a radial direction of the stator (i.e., hereinafter, the split stator 20) in a plurality of turns to form a wire layer 15, and the wire layer 15 is wound in a plurality of layers from inside to outside to form a winding unit 14; the cross section of the wire 13 is rectangular, and the surface corresponding to the long side of the cross section of the wire 13 of the innermost layer is attached to the outer surface of the winding part 12, and the surfaces corresponding to the long sides of the cross section of the wires 13 of the adjacent layers are attached to each other. When a copper wire (namely a lead 13 in the application) is wound, a surface corresponding to a short side on a section is generally attached to a winding part 12 for winding, the long side becomes the thickness of the copper wire in the winding process, the winding is inconvenient, and the compression effect between the copper wires is difficult to ensure; by winding the long side corresponding surface on the section of the wire 13 by the winding part 12, the wire 13 can be more regular during winding, the labor intensity of winding can be reduced, and the compression effect between the wires 13 is enhanced.
In this embodiment, the term "inner" is an inner ring of the winding portion 12, and the term "outer" is an outer ring of the winding portion 12.
In some embodiments, a modified winding manner of the wire 13 may be configured as shown in fig. 3. Referring to fig. 3, transposition portions 16 are formed between adjacent wire layers 15, the transposition portions 16 are uniformly distributed on a first side and a second side of the wire winding portion 12, the first side and the second side are oppositely arranged, and one of the first side and the second side is a lead-out side of the wire 13.
At present, when the copper wire is wound, the copper wire is led in and led out from the same side of each stator single-tooth structure 10, the transposition part 16 of the copper wire is also positioned at the same side of each stator single-tooth structure 10, the transposition part 16 can enable a gap between edges forming the top of the winding unit 14 and the bottom of the fixing part 11 to be smaller, so that the leading-in end and the leading-out end of the copper wire are clamped, the edge of the fixing part 11 is extruded on the copper wire, and when the motor works, the edge of the fixing part 11 continuously rubs and cuts the copper wire to cause damage of the copper wire.
Through equipartition in the first side and the second side of stator monodentate structure 10 with transposition portion 16, can effectually reduce the coiling and form the height at wire winding unit 14 top to guarantee wire winding unit 14 and the clearance of fixed part 11 upper edge, extension wire 13's life-span.
It should be noted that, the distribution paths of the first side and the second side are parallel to the axial direction of the stator, the lead-in side and the lead-out side of the wire 13 are the same, and when the first side corresponds to the left side in fig. 1, the second side corresponds to the right side in fig. 1. When the wire 13 is wound, a wire layer 15 is formed by winding a plurality of turns from bottom to top along the radial direction of the stator, then the wire 13 is led to the bottom periphery of the finished wire layer 15 (namely, a transposition part 16 is formed), the winding of the next wire layer 15 is continued, and the next wire layer 15 is wrapped on the periphery of the last wire layer 15 after the winding is finished (the 'upper', 'lower', 'left', 'right' in the section are all visual directions in fig. 1).
In some embodiments, an alternative winding manner of the wire 13 may be as shown in fig. 3. Referring to fig. 3, a transposition portion 16 is formed between adjacent wire layers 15, and the transposition portions 16 are located on a third side of the winding portion 12, the third side being opposite to the lead-out side of the wire 13.
At present, when the copper wire is wound, the copper wire is led in and led out from the same side of each stator single-tooth structure 10, the transposition part 16 of the copper wire is also positioned at the same side of each stator single-tooth structure 10, the transposition part 16 can enable a gap between edges forming the top of the winding unit 14 and the bottom of the fixing part 11 to be smaller, so that the leading-in end and the leading-out end of the copper wire are clamped, the edge of the fixing part 11 is extruded on the copper wire, and when the motor works, the edge of the fixing part 11 continuously rubs and cuts the copper wire to cause damage of the copper wire.
The height of the top of the winding unit 14 at the leading-out side of the wire 13 can be effectively reduced by arranging the transposition portion 16 on the third side of the stator single-tooth structure 10, so that the gap between the winding unit 14 and the upper edge of the fixing portion 11 is ensured, and the service life of the wire 13 is prolonged.
It should be noted that, the distribution paths of the third side and the lead-out side of the wire 13 are parallel to the axial direction of the stator, the lead-out side and the lead-in side of the wire 13 are the same side, referring to fig. 1, the left side of the stator single-tooth structure 10 is the lead-out side of the wire 13, and the right side of the stator single-tooth structure 10 is the third side (the "left" and the "right" in this section are both the intuitive directions in fig. 1).
In some embodiments, not shown in the drawings, a breakdown preventing layer is disposed between adjacent wires 13. Alternatively, the puncture-resistant layer may be glass wool. When the wire 13 is wound, if the deformation is severe during bending, commonly called bending is dead, the wire is easy to break down, the wire 13 is prevented from breaking down by arranging the anti-breakdown layer, and the service life of the wire 13 and the working quality of the motor are improved.
In some embodiments, a modified embodiment of the winding unit 14 may adopt the structure shown in fig. 1 to 2. Referring to fig. 1 to 2, the outer surface of the winding unit 14 is wrapped with a first insulating layer 17, the outer circumferential surface of the winding unit 14 is covered with a second insulating layer 18, and the second insulating layer 18 is located between the first insulating layer 17 and the winding unit 14, or the first insulating layer 17 is located between the second insulating layer 18 and the winding unit 14; the first insulating layer 17 serves to perform an insulating function between the winding unit 14 and the fixing portion 11, and between the winding unit 14 and the winding portion 12. The first insulating layer 17 plays an insulating role between the winding unit 14 and the fixing portion 11, and between the winding unit 14 and the winding portion 12; the second insulating layer 18 plays an insulating role between the adjacent winding units 14, and by providing two insulating layers, the insulating effect between the winding units 14 and the fixing portion 11, and between the adjacent winding units 14 is improved.
The specific process is as follows: laying a first insulating layer 17 on the winding part 12, and forming a winding space with an opening on the first insulating layer 17; winding the wire 13 within the winding space until the winding unit 14 is formed; turning over the opening of the first insulating layer 17 so that the two ends of the opening of the first insulating layer 17 overlap and wrap the winding unit 14 (or after the second insulating layer 18 is wound, the opening of the first insulating layer 17 is turned over); the second insulating layer 18 is wrapped around the outer periphery of the lap joint of the first insulating layer 17. In the winding process, the second insulating layer 18 is wound after the first insulating layer 17 is sealed, so that the effect of fixing the lap joint of the first insulating layer 17 can be indirectly achieved, and the operation process is simple.
Based on the same inventive concept, the embodiment of the present application further provides a split stator 20, including a plurality of stator groups 21 forming an annular array structure, where each stator group 21 includes two stator single-tooth structures 10 described above, and two stator single-tooth structures 10 in one stator group 21 are butted along a circumferential path of the annular array structure, and are connected by a connecting piece 30; the assembled stator is divided into two half parts, wherein a first wire group 22 is formed by the winding units 14 on the stator single-tooth structure 10 of one half part, a second wire group 23 is formed by the winding units 14 on the stator single-tooth structure 10 of the other half part, and the wire inlet end of the first wire group 22 and the wire inlet end of the second wire group 23 are mutually butted ends; the connecting member 30 has two pressing portions 31 disposed opposite to each other, and in one stator group 21, the two pressing portions 31 are respectively disposed in the connecting grooves 111 of the two fixing portions 11, and apply opposing pressing forces to the two fixing portions 11.
Before the stator single tooth structure 10 of the present embodiment is installed, the wire 13 needs to be wound on each winding portion 12 to form the winding unit 14 on each stator single tooth structure 10, and then each stator single tooth structure 10 is installed on the stator housing (each two stator single tooth structures 10 are installed in a group) according to the winding unit 14 on the stator single tooth structure 10 until the stator is formed.
Referring to fig. 7 and 8, A1-X1, B1-Y1 and C1-Z1 form a first wire set 22, A2-X2, B2-Y2 and C2-Z2 form a second wire set 23, A1 and A2 are connected, B1 and B2 are connected, C1 and C2 are connected, X1, Y1 and Z1 are connected, and X2, Y2 and Z2 are connected.
FIG. 7 shows a sequential wiring scheme, with a 30-pole 36-slot winding for example, with the current inflow near the A1 end being positive and the current inflow near the X1 end being negative in the circumferential direction of A1, B1 and C1; a2, B2, and C2 are positive for current inflow near the A2 end and negative for current inflow near the X2 end in the circumferential direction:
A1:1,6，-7，-12，13,18；
A2：-19，-24,25,30，-31，-36；
B1:2，-3，-8,9,14，-15；
B2：-20,21,26，-27，-32,33；
C1：-4，5，10，-11，-16,17,；
C2：22，-23，-28,29,34，-35；
it can be seen that the distribution of A1 and A2 in space is 180 degrees, the head ends of A1 and A2 are led out to the wire box, the A2 needs longer lead wires to cross the coil of A1 group to the head end position of A1 and the A1 is led out to the junction box in parallel, and the lead wire distance of A2 can be seen to be longer.
Fig. 8 shows a reverse connection method (connection method of the split stator 20 of the present application), taking a winding of 30 poles and 36 slots as an example, current inflow near the A1 end in the circumferential direction of A1, B1 and C1 is positive, and current inflow near the X1 end is negative; a2, B2, and C2 are positive for current inflow near the A2 end and negative for current inflow near the X2 end in the circumferential direction:
A1:1,6，-7，-12，13,18；
A2：36,31，-30，-25,24,19；
B1:2，-3，-8,9,14，-15；
B2：-33,32,27，-26，-21,20；
C1：-4，5，10，-11，-16,17,；
C2：35，-34，-29,28,23，-22；
thus, the head ends of A1 and A2 are relatively close, longer wiring is avoided, and in the case of 36, the current of A2 flows from the right side of 36 and flows from the left side of 36 in sequence; in the reverse order, the current of A2 still flows from the right side of 36 and flows from the left side of 36, and the use is not affected.
Compared with the prior art, the first wire group 22 or the second wire group 23 on the assembled stator 20 adopts a reverse wiring mode, so that the head end of the second wire group 23 is close to the head end of the first wire group 22, and when the head ends of the first wire group 22 and the second wire group 23 are connected, the lead wire can be relatively short, thereby greatly reducing the use of the length of the lead wire and reducing the consumption cost of the lead wire; the lead wire is shorter, and when the motor works, the lead wire is electrified, so that heating can be reduced, the overheating phenomenon is relieved, and the influence of an interference magnetic field generated by overlong lead wire on the motor work is avoided. Each stator single tooth structure 10 is manufactured, wound and installed independently, so that the production period is shortened, the production efficiency is improved, and the cost of a die is greatly saved; compared with the whole stator, the stator single-tooth structure 10 is convenient to transport, reduces occupied space and lowers transport cost during transport; the installation sequence is not required to be limited during installation, so that the installation process is simplified; when in winding, each stator single-tooth structure 10 is independently wound, the winding processes of the stator single-tooth structure 10 are not interfered, the stator single-tooth structure 10 is connected with the winding units 14 after being installed, and the winding accuracy is improved. The two stator single-tooth structures 10 are one stator group 21, the tensioning of the stator single-tooth structures 10 is realized through the extrusion part 31 on the connecting piece 30, and the last stator single-tooth structure 10 cannot be installed due to accumulated errors caused during installation.
In some embodiments, a specific implementation of the stator single tooth structure 10 may be as shown in fig. 4. Referring to fig. 4, the stator single tooth structure 10 includes a plurality of sheet structures 24 stacked in sequence along an axial direction of the annular array structure, two end plates 25 are respectively disposed at two ends of the annular array structure in the axial direction, and the two end plates 25 are connected by a threaded connection member penetrating the plurality of sheet structures 24. Optionally, the threaded connection is a screw and nuts connected to two ends of the screw. When the screw rod is installed, the screw rod sequentially penetrates through one end plate 25, the plurality of sheet structures 24 and the other end plate 25, and then nuts at two ends of the screw rod are fixed.
In some embodiments, a specific implementation of the end plate 25 may be configured as shown in fig. 4. Referring to fig. 4, the end plate 25 is an insulating member, and a rounded chamfer 26 is provided at an edge of the end plate 25 corresponding to the position of the winding portion 12. Optionally, the end plate 25 may be a wooden member, and may play an insulating role at two ends of the stator single tooth structure 10 along the axial direction of the stator, and since the wire 13 is mainly wound around the periphery of the winding portion 12, that is, the periphery of the end plate 25, the wire 13 needs to ensure a certain compression degree in the winding process, the end plate 25 corresponds to the edge of the winding portion 12, and is provided with a circular chamfer 26, so that the wire 13 can be prevented from being damaged at the edge of the winding portion 12 during compression, and the circular chamfer 26 can reduce abrasion to the wire 13 and prolong the service life of the wire 13.
In some embodiments, a specific implementation of the end plate 25 may be configured as shown in fig. 6. Referring to fig. 6, in the same stator group 21, a protruding portion 112 is provided on a side surface of the connecting groove 111 near the abutting end of the two fixing portions 11, and the protruding portion 112 is used for defining the position of the stator single tooth structure 10 in the radial direction of the annular array structure. The extrusion part 31 is adapted to the protruding part 112, and after the extrusion part 31 is positioned in the connecting groove 111, the extrusion part 31 and the protruding part 112 are mutually matched, so that one end of the extrusion part 31, which is opposite to the center of the annular array structure, plays a limiting role, prevents the extrusion part 31 from falling off, and the fixing effect of the stator single-tooth structure 10 is optimized.
In order to achieve the fixing effect of the two stator single tooth structures 10 in the same stator group 21, referring to fig. 6 (both the left and right in this section are the visual directions in fig. 6), in the same stator group 21, the protruding portion 112 of the left stator single tooth structure 10 is located on the right side of the connecting slot 111, and then the protruding portion 112 of the right stator single tooth structure 10 is located on the left side of the connecting slot 111, so that one pressing portion 31 presses left, the other pressing portion 31 presses right, and the two pressing portions 31 achieve clamping of the two stator single tooth structures 10.
In some embodiments, a modified implementation of the stator single tooth structure 10 described above may employ a structure as shown in fig. 6. Referring to fig. 6, the coupling groove 111 is formed with a relief space 113 at the opposite side of the protrusion 112. Alternatively, the side surfaces of the connection groove 111 on the opposite sides of the protrusion 112 may form an angle with the bottom surface of the connection groove 111, which may be a right angle or an obtuse angle. In this case, when the connecting member 30 is mounted, the pressing portion 31 of the connecting member 30 is mainly pressed toward the side provided with the protruding portion 112, and the abutting portion of the two stator single-tooth structures 10 in the same stator group 21 forms an abutting end, and the two stator single-tooth structures 10 are pressed against each other. The avoidance space 113 is arranged to facilitate the extension and the removal of the connecting piece 30, so that the position of the connecting piece 30 can be adjusted during installation, the clamping is prevented, the installation of the connecting piece 30 is facilitated, and the loading and unloading of the single-tooth structure are further facilitated.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. A stator single tooth structure, comprising:
the fixing part is provided with a connecting groove with an outward opening, at least one side of the connecting groove is convexly provided with a protruding part, and the protruding part is used for limiting the position of the fixing part in the opening direction of the connecting groove;
the winding part is arranged on the inner side of the fixing part and is used for winding; and
a wire wound around the winding portion to form a winding unit;
the wire is wound for a plurality of circles along the radial direction of the stator to form a wire layer, and the wire layer is formed into a plurality of layers from inside to outside to form the winding unit;
the section of the wire is rectangular, the surface corresponding to the long side of the section of the wire of the innermost layer is attached to the outer surface of the winding part, and the surfaces corresponding to the long sides of the section of the wire of the adjacent layers are attached to each other;
and transposition parts are formed between adjacent wire layers, and are positioned on a third side of the winding part, wherein the third side is the opposite side of the lead-out side of the wire.
2. The stator single tooth structure of claim 1 wherein a breakdown preventing layer is provided between adjacent ones of said conductors.
3. The stator single tooth structure according to claim 1, wherein the outer surface of the winding unit is wrapped with a first insulating layer, the outer circumferential surface of the winding unit is covered with a second insulating layer, the second insulating layer is located between the first insulating layer and the winding unit, or the first insulating layer is located between the second insulating layer and the winding unit;
the first insulating layer is used for insulating between the winding unit and the fixing part and between the winding unit and the winding part.
4. A split stator, characterized by comprising a plurality of stator groups forming an annular array structure, wherein each stator group comprises two stator single-tooth structures as claimed in any one of claims 1-3, and two stator single-tooth structures in one stator group are butted along a circumferential path of the annular array structure and are connected through a connecting piece;
the assembled stator is divided into two half parts, wherein the winding units on the stator single-tooth structure of one half part form a first wire group, the winding units on the stator single-tooth structure of the other half part form a second wire group, and the wire inlet end of the first wire group and the wire inlet end of the second wire group are mutually butted;
the connecting piece is provided with two extrusion parts which are oppositely arranged, one extrusion part is arranged in the stator group, the two extrusion parts are respectively arranged in the connecting grooves of the two fixing parts, and opposite extrusion forces are applied to the two fixing parts.
5. The split stator according to claim 4, wherein the stator single-tooth structure comprises a plurality of sheet structures stacked in sequence along an axial direction of the annular array structure, two end plates are respectively arranged at two ends of the annular array structure in the axial direction, and the two end plates are connected through a threaded connecting piece penetrating through the plurality of sheet structures.
6. The split stator of claim 5 wherein said end plates are insulating members and rounded corners are provided at edges of said end plates corresponding to the positions of said windings.
7. The split stator as claimed in claim 4 wherein said projection is provided in said connecting slot on a side of said connecting slot adjacent to the abutting ends of two of said fixed portions, said projection being adapted to define the location of said stator single tooth structure in a radial direction of said annular array structure.
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| CN202111131556.0A CN113872347B (en) | 2021-09-26 | 2021-09-26 | Stator single tooth structure and assembled stator |
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| CN202111131556.0A CN113872347B (en) | 2021-09-26 | 2021-09-26 | Stator single tooth structure and assembled stator |
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| JP2007089346A (en) * | 2005-09-26 | 2007-04-05 | Mitsubishi Electric Corp | Stator for rotary electric machine |
| CN207612134U (en) * | 2017-12-29 | 2018-07-13 | 新疆金风科技股份有限公司 | Monodentate module, stator modules and motor |
| CN109274189A (en) * | 2018-12-05 | 2019-01-25 | 浙江台运汽车科技有限公司 | The stator winding structure of axial-flux electric machine |
| CN209402278U (en) * | 2019-03-19 | 2019-09-17 | 广东美的环境电器制造有限公司 | A kind of block stator and block-stator motor |
| CN113039704A (en) * | 2018-12-13 | 2021-06-25 | 松下知识产权经营株式会社 | Stator and motor using the same |
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2021
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|---|---|---|---|---|
| CN1901328A (en) * | 2003-05-23 | 2007-01-24 | 本田技研工业株式会社 | Stator and insulating bobbin and a manufacturing method of the stator |
| JP2007089346A (en) * | 2005-09-26 | 2007-04-05 | Mitsubishi Electric Corp | Stator for rotary electric machine |
| CN207612134U (en) * | 2017-12-29 | 2018-07-13 | 新疆金风科技股份有限公司 | Monodentate module, stator modules and motor |
| CN109274189A (en) * | 2018-12-05 | 2019-01-25 | 浙江台运汽车科技有限公司 | The stator winding structure of axial-flux electric machine |
| CN113039704A (en) * | 2018-12-13 | 2021-06-25 | 松下知识产权经营株式会社 | Stator and motor using the same |
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| CN113872347A (en) | 2021-12-31 |
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