CN114825688A - Unequal-width slot stator assembly and motor - Google Patents
Unequal-width slot stator assembly and motor Download PDFInfo
- Publication number
- CN114825688A CN114825688A CN202210373827.1A CN202210373827A CN114825688A CN 114825688 A CN114825688 A CN 114825688A CN 202210373827 A CN202210373827 A CN 202210373827A CN 114825688 A CN114825688 A CN 114825688A
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- stator
- slot
- stator core
- rectangular
- slots
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- 238000004804 winding Methods 0.000 claims abstract description 26
- 239000004020 conductor Substances 0.000 claims description 49
- 238000002360 preparation method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/52—Fastening salient pole windings or connections thereto
- H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
Abstract
The invention relates to the technical field of motors, in particular to a variable-width slot stator assembly and a motor. Each stator slot is divided into N rectangular slots along the radial direction of the stator core, the width of the N rectangular slots is reduced in sequence from the outer side of the stator core to the inner side of the stator core, the cross section of each stator slot is in a symmetrical N-layer step shape, wherein N is more than or equal to 2 and less than or equal to 4, and N is an integer. According to the invention, the rectangular groove closest to the outer side of the stator core is provided with the two wires which are sequentially arranged along the circumferential direction of the stator core, so that the length-width ratio of the outermost wire is effectively reduced, the forming difficulty of the wire is reduced, the turning radius required by twisting the wire is reduced, and the space utilization advantage of the end winding is improved. And under the condition that the number of the stator slots of the stator assembly and the number of the wires in each slot are relatively small, the stator slots are divided into three rectangular slots, so that the utilization rate of the slots is improved, and meanwhile, the process difficulty and the economic cost of production and manufacturing can be effectively reduced.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a variable-width slot stator assembly and a motor.
Background
In order to improve the slot filling rate of the motor, more and more motor schemes select a square wire as a motor wire or a flat wire motor scheme. In order to further improve the space utilization rate of the motor, the design of unequal groove widths is provided. However, in the existing design schemes with unequal groove widths, the wire of the outer circular groove has the characteristic of overlarge width-to-width ratio. The difficulty of forming the wire with large width-to-width ratio is high, and the turning radius required by the wire twisting head is large, so that the space utilization advantage is lost due to the overlarge size of the winding end part.
Especially, when the width difference between the outer circular slot and the inner circular slot is large, the difficulty of winding design and wire forming is larger. The most prominent problem is the design of flat wires with relatively small number of stator slots and wires per slot, and the wires with too large width-to-width ratio are generally positioned on the layer close to the outer circle.
Disclosure of Invention
In order to solve the problems, the invention provides a slot stator assembly with unequal widths, which comprises a stator core and a stator winding, wherein a plurality of stator slots are arranged on the stator core, and are sequentially arranged along the circumferential direction of the stator core and are in an annular array shape; the winding of the stator winding adopts a rectangular wire, and the winding is uniformly and symmetrically arranged in the stator slot;
each stator slot is divided into N rectangular slots along the radial direction of the stator core, the width of the N rectangular slots is reduced in sequence from the outer side of the stator core to the inner side of the stator core, the cross section of each stator slot is in a symmetrical N-layer step shape, wherein N is more than or equal to 2 and less than or equal to 4, and N is an integer;
in the rectangular slot closest to the outside of the stator core, 1 layer of double-conductor layers are arranged along the radial direction of the stator core, 2 conductors are arranged in the double-conductor layers, and the 2 conductors are sequentially arranged along the circumferential direction of the stator core; in other rectangular slots, 3 or 5 single conductor layers are arranged along the radial direction of the stator core, and only 1 conductor is arranged in each single conductor layer.
Further, on the stator core, for two adjacent stator slots, the distance between any two rectangular slots in the same layer is not less than the distance between the rectangular slots closest to the center of the stator core.
Further, the width of the conducting wires in the same rectangular groove is the same.
Furthermore, in the same stator slot, the thickness of a single wire in the rectangular slot closest to the outer side of the stator core is larger than that of a single wire in the other rectangular slots; the width of the single wire in the rectangular groove closest to the outer side of the stator core is smaller than the width of the single wire in the other rectangular grooves.
Further, the width of a single wire in the rectangular groove closest to the outer side of the stator core is not less than 0.65 times of the thickness of the single wire.
Furthermore, in the same stator slot, for the sectional area of each single wire, the maximum sectional area is not more than 1.29 times of the average sectional area, and the minimum sectional area is not less than 0.79 times of the average sectional area.
The invention also provides a slot motor with unequal widths, which comprises the stator assembly.
The invention has the beneficial effects that: according to the invention, the rectangular groove closest to the outer side of the stator core is provided with the two wires which are sequentially arranged along the circumferential direction of the stator core, so that the length-width ratio of the outermost wire is effectively reduced, the forming difficulty of the wire is reduced, the turning radius required by twisting the wire is reduced, and the space utilization advantage of the end winding is improved. And under the condition that the number of the stator slots of the stator assembly and the number of the wires in each slot are relatively small, the stator slots are divided into three rectangular slots, so that the utilization rate of the slots is improved, and meanwhile, the process difficulty and the economic cost of production and manufacturing can be effectively reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a schematic diagram of a two-step stator slot configuration in an embodiment of the present invention;
FIG. 2 shows a schematic view of a three step stator slot configuration in an embodiment of the present invention;
fig. 3 shows a schematic view of a four-step stator slot configuration in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a slot motor with unequal widths, which comprises a stator assembly. The stator assembly comprises a stator core and a stator winding; the stator core is generally cylindrical in shape to facilitate receipt of the motor rotor assembly within the stator core. The stator core is provided with a plurality of stator slots, and the stator slots are sequentially arranged along the circumferential direction of the stator core and are in an annular array shape. The winding of the stator winding adopts a rectangular wire, and the winding is uniformly and symmetrically arranged in the stator slot.
Specifically, the stator winding can be divided into an in-slot winding and an end winding; the in-slot winding refers to a part of the rectangular conducting wire in the stator slot, and the end winding refers to a part of the rectangular conducting wire on two sides of the stator core. The end windings are used for connecting rectangular wires at different positions in different stator slots in a matched mode according to a certain span, and therefore internal connection of the stator windings is achieved. The end windings are distributed on two sides of the stator core and are respectively called a hairpin end and a welding end.
As shown in fig. 1-3, each stator slot is divided into N rectangular slots along the radial direction of the stator core, the widths of the N rectangular slots are sequentially reduced from the outer side of the stator core to the inner side of the stator core, the cross sections of the stator slots are in a symmetrical N-layer step shape, wherein N is greater than or equal to 2 and less than or equal to 4, and N is an integer.
Specifically, 1 layer of double-conductor layers are arranged in a rectangular groove closest to the outer side of the stator core along the radial direction of the stator core, 2 conductors are arranged in the double-conductor layers, and the 2 conductors are sequentially arranged along the circumferential direction of the stator core; in other rectangular slots, 3 or 5 single conductor layers are arranged along the radial direction of the stator core, and only 1 conductor is arranged in each single conductor layer.
The shape and size of the stator slot are determined by the shape and size of the wire in the slot. In addition, the width of the wires in the same rectangular groove is the same.
Furthermore, in the same stator slot, the thickness of a single wire in the rectangular slot closest to the outer side of the stator core is larger than that of a single wire in the other rectangular slots; the width of the single wire in the rectangular groove closest to the outer side of the stator core is smaller than the width of the single wire in the other rectangular grooves.
Preferably, the width of the single conductor in the rectangular slot closest to the outside of the stator core is not less than 0.65 times its thickness. This arrangement enables the slot utilization to be maximized.
The width is a length in the circumferential direction of the stator core, and the thickness is a length in the radial direction of the stator core.
Preferably, in the same stator slot, the maximum sectional area is not more than 1.29 times of the average sectional area, and the minimum sectional area is not less than 0.79 times of the average sectional area for the sectional area of each single wire. The problem that the size difference of the wires in the same stator slot is too large, the utilization rate of the slot is reduced, and the overall performance of the winding is influenced is solved.
Illustratively, as shown in fig. 1, the stator slots are arranged in four conductor layers along the radial direction of the stator core. The stator comprises a stator core, a stator core and a plurality of layers of double wires, wherein the layer closest to the outer side of the stator core is a double-wire layer, 2 wires are arranged in the double-wire layer, and the 2 wires are sequentially distributed along the circumferential direction of the stator core; all the other layers are single conductor layers, and only 1 conductor is arranged in each single conductor layer. The sizes of the single lead layers are the same, and the sizes of the inner leads are also the same; the width of the single conductor layer is smaller than that of the double conductor layer.
Two conductor layers with different layer widths are arranged to form two stator slotsThe layer is step-shaped and is divided into two rectangular grooves. Wherein, the layer of double conductor layer closest to the outer side of the stator core is arranged in the first rectangular groove, and the other three layers of single conductor layers are arranged in the second rectangular groove. The sectional area of the single stator slot is 54.7350mm 2 The cross-sectional area of the wire in the groove is 40.3635mm 2 The bare copper bath fullness rate was 73.74%.
Preferably, as shown in fig. 2, the stator slots are provided with four conductor layers in the radial direction of the stator core. The stator comprises a stator core, a stator core and a plurality of layers of double wires, wherein the layer closest to the outer side of the stator core is a double-wire layer, 2 wires are arranged in the double-wire layer, and the 2 wires are sequentially distributed along the circumferential direction of the stator core; all the other layers are single conductor layers, and only 1 conductor is arranged in each single conductor layer. The sizes of the middle two single conductor layers are the same, and the sizes of the inner conductors are also the same; the width of the middle two single conductor layers is smaller than that of the layer of double conductor layer closest to the outer side of the stator core and larger than that of the layer of single conductor layer closest to the center of the stator core.
And arranging three wire layers with different widths to enable the stator slots to form three layers of ladder shapes and be divided into three rectangular slots. The two layers of single conductor layers are arranged in the second rectangular groove, and the layer of single conductor layer closest to the center of the stator core is arranged in the third rectangular groove. The sectional area of a single stator slot is 55.5350mm 2 The cross-sectional area of the wire in the groove is 41.0755mm 2 The full rate of the bare copper groove reaches 73.96 percent.
Preferably, as shown in fig. 3, the stator slots are provided with four conductor layers along the radial direction of the stator core. The stator comprises a stator core, a stator core and a plurality of layers of double wires, wherein the layer closest to the outer side of the stator core is a double-wire layer, 2 wires are arranged in the double-wire layer, and the 2 wires are sequentially distributed along the circumferential direction of the stator core; all the other layers are single conductor layers, and only 1 conductor is arranged in each single conductor layer. And the width of each layer of conducting wire layer is reduced in sequence along the direction from the outer side of the stator core to the center of the stator core.
Four layers of wide conductor layers are arranged, so that the stator slots form four layers of ladder shapes and are divided into four rectangular slots. Each layer of wire layer is sequentially and independently arranged in the first rectangular groove, the second rectangular groove, the third rectangular groove and the rectangular grooveAnd fourthly. The sectional area of the single stator slot is 55.9359mm 2 The cross-sectional area of the wire in the groove is 41.4315mm 2 The bare copper bath fullness was 74.07%.
It should be noted that the three types of stepped stator slots described above satisfy: the three stator slots have the same slot depth; rectangular slots of the three stator slots, which are closest to the outer side of the stator core, and conductors in the slots are respectively the same; rectangular slots of the three stator slots, which are closest to the center of the stator core, and conductors in the slots are respectively the same; and in each case, for two adjacent stator slots, the distance between two rectangular slots in the same layer is not less than the distance between two rectangular slots closest to the center of the stator core.
According to the embodiment of the invention, the rectangular groove closest to the outer side of the stator core is provided with the two wires which are sequentially arranged along the circumferential direction of the stator core, so that the length-width ratio of the outermost wire is effectively reduced, the forming difficulty of the wire is reduced, the turning radius required by twisting the wire is reduced, and the space utilization advantage of the end winding is improved.
Under the condition that the number of stator slots of the stator assembly and the number of leads of each slot are relatively small, the slot utilization rate of the three-layer stepped stator slots and the four-layer stepped stator slots is obviously improved compared with that of the two-layer stepped stator slots in terms of the slot utilization rate, wherein the slot utilization rate can be increased to the maximum extent by the four-layer stepped stator slots; from the process perspective, the four-layer ladder-shaped stator slots need wires of four specifications, and the economic cost and the process difficulty are higher than those of the three-layer ladder-shaped stator slots, so that the three-layer ladder-shaped stator slots can effectively reduce the process difficulty and the economic cost of production and manufacturing while the slot utilization rate is improved.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A stator assembly with slots of unequal widths comprises a stator core and a stator winding, wherein a plurality of stator slots are arranged on the stator core, and are sequentially arranged along the circumferential direction of the stator core and are in an annular array shape; the winding of the stator winding adopts a rectangular wire, and the winding is uniformly and symmetrically arranged in the stator slot; it is characterized in that the preparation method is characterized in that,
each stator slot is divided into N rectangular slots along the radial direction of the stator core, the width of the N rectangular slots is reduced in sequence from the outer side of the stator core to the inner side of the stator core, the cross section of each stator slot is in a symmetrical N-layer step shape, wherein N is more than or equal to 2 and less than or equal to 4, and N is an integer;
in the rectangular slot closest to the outside of the stator core, 1 layer of double-conductor layers are arranged along the radial direction of the stator core, 2 conductors are arranged in the double-conductor layers, and the 2 conductors are sequentially arranged along the circumferential direction of the stator core; in other rectangular slots, 3 or 5 single conductor layers are arranged along the radial direction of the stator core, and only 1 conductor is arranged in each single conductor layer.
2. The unequal width slot stator assembly of claim 1 wherein the distance between any two like-layer rectangular slots on the stator core for two adjacent stator slots is no less than the distance between the rectangular slots closest to the center of the stator core.
3. The unequal width slot stator assembly of claim 1 wherein the wires in the same rectangular slot are of the same width.
4. The unequal-width slot stator assembly according to claim 3, wherein in the same stator slot, the thickness of a single wire in the rectangular slot closest to the outside of the stator core is greater than the thickness of a single wire in the remaining rectangular slots; the width of the single wire in the rectangular groove closest to the outer side of the stator core is smaller than the width of the single wire in the other rectangular grooves.
5. The unequal-width slot stator assembly of claim 4, wherein the width of the single wire in the rectangular slot closest to the outside of the stator core is no less than 0.65 times its thickness.
6. A variable width slot stator assembly according to claim 4 or 5 wherein the maximum cross-sectional area is no more than 1.29 times the average cross-sectional area and the minimum cross-sectional area is no less than 0.79 times the average cross-sectional area for the cross-sectional area of each individual wire in the same said stator slot.
7. A slot electrical machine of unequal width, the machine comprising the stator assembly of any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373827.1A CN114825688B (en) | 2022-04-11 | 2022-04-11 | Unequal-width slot stator assembly and motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373827.1A CN114825688B (en) | 2022-04-11 | 2022-04-11 | Unequal-width slot stator assembly and motor |
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| Publication Number | Publication Date |
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| CN114825688A true CN114825688A (en) | 2022-07-29 |
| CN114825688B CN114825688B (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210373827.1A Active CN114825688B (en) | 2022-04-11 | 2022-04-11 | Unequal-width slot stator assembly and motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116633059A (en) * | 2023-05-15 | 2023-08-22 | 浙江大学 | Motor forming winding structure and processing method thereof |
| CN116633059B (en) * | 2023-05-15 | 2024-05-14 | 浙江大学 | Motor forming winding structure and processing method thereof |
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| US20100320864A1 (en) * | 2009-06-19 | 2010-12-23 | Gm Global Technology Operations, Inc. | Methods and apparatus for a bar-wound stator with rotated conductors |
| CN111130233A (en) * | 2018-11-01 | 2020-05-08 | 福建省仙游电机股份有限公司 | Convex groove flat copper wire motor stator assembly |
| JP2020156298A (en) * | 2019-03-22 | 2020-09-24 | 日本電産株式会社 | Stator and manufacturing method of the stator |
| CN215452605U (en) * | 2021-11-08 | 2022-01-07 | 比亚迪股份有限公司 | Stator module and motor with same |
| CN114243962A (en) * | 2021-12-17 | 2022-03-25 | 上海易唯科电机技术有限公司 | Stator module and motor |
| CN114243961A (en) * | 2021-12-17 | 2022-03-25 | 上海易唯科电机技术有限公司 | Stator assembly with same groove layer and multiple lines and flat wire motor |
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2022
- 2022-04-11 CN CN202210373827.1A patent/CN114825688B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100320864A1 (en) * | 2009-06-19 | 2010-12-23 | Gm Global Technology Operations, Inc. | Methods and apparatus for a bar-wound stator with rotated conductors |
| CN101931275A (en) * | 2009-06-19 | 2010-12-29 | 通用汽车环球科技运作公司 | Be used to have the method and apparatus of the bar-wound stator of rotated conductors |
| CN111130233A (en) * | 2018-11-01 | 2020-05-08 | 福建省仙游电机股份有限公司 | Convex groove flat copper wire motor stator assembly |
| JP2020156298A (en) * | 2019-03-22 | 2020-09-24 | 日本電産株式会社 | Stator and manufacturing method of the stator |
| CN215452605U (en) * | 2021-11-08 | 2022-01-07 | 比亚迪股份有限公司 | Stator module and motor with same |
| CN114243962A (en) * | 2021-12-17 | 2022-03-25 | 上海易唯科电机技术有限公司 | Stator module and motor |
| CN114243961A (en) * | 2021-12-17 | 2022-03-25 | 上海易唯科电机技术有限公司 | Stator assembly with same groove layer and multiple lines and flat wire motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116633059A (en) * | 2023-05-15 | 2023-08-22 | 浙江大学 | Motor forming winding structure and processing method thereof |
| CN116633059B (en) * | 2023-05-15 | 2024-05-14 | 浙江大学 | Motor forming winding structure and processing method thereof |
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| CN114825688B (en) | 2024-01-09 |
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Address after: Room 102, 1st Floor, Building 1, No. 99 Weizhan Road, Lingang New Area, China (Shanghai) Free Trade Pilot Zone, Pudong New Area, Shanghai, November 2013 Applicant after: Shanghai YiWeiKe Motor Technology Co.,Ltd. Address before: 201306 building C, No. 888, Huanhu West 2nd Road, Lingang New District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Applicant before: Shanghai YiWeiKe Motor Technology Co.,Ltd. |
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