CN220732439U - Concatenation formula external rotor stator and motor - Google Patents
Concatenation formula external rotor stator and motor Download PDFInfo
- Publication number
- CN220732439U CN220732439U CN202321774188.6U CN202321774188U CN220732439U CN 220732439 U CN220732439 U CN 220732439U CN 202321774188 U CN202321774188 U CN 202321774188U CN 220732439 U CN220732439 U CN 220732439U
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- stator
- silicon steel
- mounting
- steel sheets
- motor
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- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 41
- 238000003780 insertion Methods 0.000 claims abstract description 22
- 230000037431 insertion Effects 0.000 claims abstract description 22
- 238000010030 laminating Methods 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 230000005291 magnetic effect Effects 0.000 abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 29
- 229910052742 iron Inorganic materials 0.000 abstract description 12
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 11
- 238000005457 optimization Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to a spliced outer rotor stator and a motor, which comprise a stator core, wherein the stator core comprises a stator yoke and a plurality of stator teeth, and materials for forming the stator teeth comprise oriented silicon steel sheets. The stator yoke is connected with a plurality of mounting blocks, an insertion groove is formed in the mounting blocks, the mounting blocks and the stator yoke are integrally formed and form a stator frame, the insertion blocks are mounted in the insertion groove, and the insertion blocks and the mounting blocks jointly form stator teeth. The stator frame is formed by winding and laminating unoriented silicon steel sheets, the insertion block is formed by laminating the oriented silicon steel sheets, and the insertion block is fixed in the insertion groove in an interference manner. Compared with the prior art, the material for forming the stator teeth comprises the oriented silicon steel sheet, so that the saturation phenomenon of magnetic density of the stator teeth is solved, the magnetic permeability is enhanced, the iron loss is reduced, and the efficiency of the motor is improved; and the direction of magnetic force lines of the stator is consistent with the rolling direction of the oriented silicon steel sheet, the saturation working point of the motor is higher, the magnetomotive force of the motor is larger, and the torque density of the motor in unit volume is improved.
Description
Technical Field
The utility model relates to a spliced outer rotor stator and a motor, and belongs to the technical field of motor stators.
Background
The stator core material of the traditional motor generally adopts unoriented silicon steel sheets, and the saturated magnetic density of the unoriented silicon steel sheets is limited, so that the performance of the motor under some special working conditions is limited. For example, under the working condition of high rotation speed or high torque operation, the iron core of the motor stator, particularly the tooth part of the stator is limited by the size of the motor, and under the condition of a certain tooth width, the phenomenon of magnetic saturation of the stator iron core is caused by the rising of magnetic density. Once the magnetic flux density is saturated somewhere, a great amount of iron loss of the motor is liable to be caused, so that the efficiency of the motor is reduced.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art and provides a spliced outer rotor stator and a motor capable of reducing iron loss.
The technical scheme adopted for realizing the purpose is as follows:
the spliced outer rotor stator comprises a stator core, wherein the stator core comprises a stator yoke and a plurality of stator teeth, and materials for forming the stator teeth comprise oriented silicon steel sheets.
As a further optimization of the above technical solution: the material constituting the stator yoke includes unoriented silicon steel sheets.
As a further optimization of the above technical solution: the stator yoke is connected with a plurality of mounting blocks, an insertion groove is formed in each mounting block, the mounting blocks and the stator yoke are integrally formed and form a stator frame, the insertion blocks are mounted in the insertion grooves, and the insertion blocks and the mounting blocks jointly form stator teeth.
As a further optimization of the above technical solution: the stator frame is formed by winding and laminating unoriented silicon steel sheets, the insertion block is formed by laminating oriented silicon steel sheets, and the insertion block is fixed in the insertion groove in an interference mode.
As a further optimization of the above technical solution: the stator yoke is formed by winding and laminating unoriented silicon steel sheets, the stator teeth are formed by laminating oriented silicon steel sheets, a plurality of clamping structures are arranged at the end parts of the stator teeth, a plurality of clamping groove structures corresponding to the clamping structures are arranged on the outer peripheral surface of the stator yoke, and the clamping structures are clamped into the clamping groove structures after the stator yoke and the stator teeth are respectively molded.
As a further optimization of the above technical solution: the buckle structure comprises a groove, a first mounting foot and a second mounting foot, wherein the first mounting foot and the second mounting foot are positioned on two sides of the groove, the clamping groove structure comprises a protruding block, and a first mounting groove and a second mounting groove which are positioned on two sides of the protruding block, the protruding block is clamped into the groove, the first mounting foot is clamped into the first mounting groove, and the second mounting foot is clamped into the second mounting groove.
As a further optimization of the above technical solution: the second mounting leg is provided with a first arc notch, the bottom of the second mounting groove is provided with a first arc protrusion, and the first arc protrusion is positioned in the first arc notch.
As a further optimization of the above technical solution: the groove is in a dovetail shape, the first mounting foot and the second mounting foot are similar to the dovetail shape, the protruding block is in a dovetail shape, and the first mounting groove and the second mounting groove are similar to the dovetail shape.
As a further optimization of the above technical solution: the tail parts of the plurality of stator teeth are mutually connected through a connecting ring to form a stator outer ring, a stator inner ring is arranged in the connecting ring, and the connecting ring and the stator inner ring jointly form the stator yoke.
As a further optimization of the above technical solution: the stator outer ring is formed by winding and laminating oriented silicon steel sheets, the stator inner ring is formed by winding and laminating unoriented silicon steel sheets, and the stator outer ring is sleeved on the stator inner ring in an interference mode.
As a further optimization of the above technical solution: the inner peripheral surface of the stator outer ring is provided with a plurality of second arc-shaped notches, the outer peripheral surface of the stator inner ring is provided with a plurality of second arc-shaped bulges, and the second arc-shaped bulges are positioned in the second arc-shaped notches.
A motor comprises the spliced outer rotor stator.
As a further optimization of the above technical solution: the motor is used for an electric vehicle.
Compared with the prior art, the material for forming the stator teeth comprises the oriented silicon steel sheet, so that the saturation phenomenon of magnetic density of the stator teeth is solved, the magnetic permeability is enhanced, the iron loss is reduced, and the efficiency of the motor is improved; the direction of magnetic force lines of the stator is consistent with the rolling direction (high magnetic conductivity direction) of the oriented silicon steel sheet, the saturation working point of the motor is higher, the magnetomotive force of the motor is larger, and the torque density of the motor in unit volume is improved; and because of the high magnetic density of the oriented silicon steel sheet, under the condition of ensuring that the magnetic flux of the tooth part of the stator is enough, the tooth part width can be reduced, so that the area of a stator slot is increased, the power of the motor is greatly improved, and the temperature rise and copper loss are reduced; the stator splicing method provides a plurality of stator splicing modes, and ensures that the spliced stator has good connection rigidity.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of the present utility model.
Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.
Fig. 3 is a schematic structural view of a second embodiment of the present utility model.
Fig. 4 is a schematic structural view of a third embodiment of the present utility model.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
Hereinafter, terms that may appear in the embodiments of the present utility model will be explained.
The oriented silicon steel sheet means that the arrangement of grains inside the silicon steel sheet has a definite directionality.
Unoriented silicon steel sheet means that the arrangement of crystal grains inside the silicon steel sheet has no definite directionality.
Iron loss: the core loss refers to the sum of hysteresis loss and eddy current loss (the residual loss is negligible) per unit mass of ferromagnetic material in alternating and pulsating magnetic fields, in W/kg. The transformer, generator and motor all have core losses. The iron loss is one of the energy losses, and is called as an iron loss because eddy currents are generated in the iron core during operation, and when the eddy currents pass through the iron core, heat energy is generated in the iron core, and the heat energy is consumed. The core loss includes hysteresis loss, eddy current loss, and residual loss of the magnetic material.
Magnetic density: i.e. the magnetic flux density, also called the magnetic induction B, which indicates how much magnetic lines of force perpendicularly pass through a unit area, reflects the degree of density of the magnetic lines of force in terms of quantity. The strength of the magnetic field is generally indicated by the magnetic induction "B", and the stronger the magnetic field, the larger the value of B, and the denser the magnetic field lines.
The motor comprises a stator, wherein the stator is a spliced outer rotor stator. The stator includes a stator core and windings. The stator core comprises a plurality of stator teeth 1, stator grooves are formed between adjacent stator teeth 1, and stator yokes 2 are formed between the bottoms of the stator grooves and the inner peripheral surface of the stator core. The windings are wound around the stator teeth 1. The material constituting the stator teeth 1 includes oriented silicon steel sheets. The oriented silicon steel sheet has the characteristics of high magnetic density and low iron loss, and the stator teeth 1 comprise the oriented silicon steel sheet, so that the saturation phenomenon of magnetic density of the tooth parts of the stator is solved, the iron loss is reduced, and the efficiency of the motor is improved; and the direction of magnetic force lines of the stator is consistent with the rolling direction (high magnetic conductivity direction) of the oriented silicon steel sheet, the saturation working point of the motor is higher, the magnetomotive force of the motor is larger, and the torque density of the motor in unit volume is improved. And because of the high magnetic density of the oriented silicon steel sheet, under the condition of ensuring that the magnetic flux of the tooth part of the stator is enough at the same diameter of the stator, the width of the tooth part can be reduced, so that the area of a stator slot is increased, the power of the motor is greatly improved, and the temperature rise and copper loss are reduced. The motor is applied to the electric vehicle, and is an outer rotor motor.
First embodiment: as shown in fig. 1 and 2, the end of the stator tooth 1 is provided with a plurality of fastening structures 3, each fastening structure comprises a dovetail-shaped groove 31, a first mounting leg 32 and a second mounting leg 33 positioned at two sides of the groove 31, the first mounting leg 32 and the second mounting leg 33 are similar to the dovetail shape, and the second mounting leg 33 is provided with a first arc-shaped notch 34. The outer peripheral surface of the stator yoke 2 is provided with a plurality of clamping groove structures 4 corresponding to the clamping structures 3, each clamping groove structure 4 comprises a dovetail-shaped protruding block 41, a first mounting groove 42 and a second mounting groove 43 which are positioned on two sides of the protruding block 41, the first mounting groove 42 and the second mounting groove 43 are similar to the dovetail shape, and a first arc-shaped protrusion 44 is formed at the bottom of the second mounting groove 43.
The stator yoke 2 is formed by stamping, winding and laminating unoriented silicon steel sheets, and has low manufacturing cost. The stator teeth 1 are made of oriented silicon steel sheets through a high-speed stamping and laminating process. After the stator yoke 2 and the stator teeth 1 are respectively molded, the buckling structure 3 is clamped into the clamping groove structure 4, the protruding block 41 is clamped into the groove 31, the first mounting leg 32 is clamped into the first mounting groove 42, the second mounting leg 33 is clamped into the second mounting groove 43, and the first arc-shaped protrusion 44 is positioned in the first arc-shaped notch 34. The first arc-shaped protrusion 44 plays a role of fool-proofing, which means that an operator can directly complete correct operation without spending attention, experience and expertise, i.e. when the mounting position of the stator tooth 1 is wrong, for example, the first mounting foot 32 is clamped into the second mounting groove 43, and at this time, the stator tooth 1 cannot be mounted in place due to the existence of the first arc-shaped protrusion 44, so that the operator is reminded of the mounting position error. The first arc-shaped protrusion 44 ensures that the stator teeth 1 are installed accurately. The oriented stator teeth 1 are spliced to the unoriented stator yoke 2, so that the magnetic permeability is enhanced, the iron loss is reduced, and the performance of the motor is improved.
Second embodiment: as shown in fig. 3, the tail parts of a plurality of stator teeth 1 are mutually connected through a connecting ring 5 to form a stator outer ring, and a stator inner ring 6 is arranged in the connecting ring 5. The connecting ring 5 and the stator inner ring 6 together form the stator yoke 2. The inner peripheral surface of the stator outer ring is provided with a plurality of second arc-shaped notches 51, and the outer peripheral surface of the stator inner ring 6 is provided with a plurality of second arc-shaped protrusions 61. The stator outer ring is formed by stamping and forming oriented silicon steel sheets, and is formed by winding and laminating, so that the manufacturing cost is low. The stator inner ring 6 is formed by stamping and winding unoriented silicon steel sheets, and has low manufacturing cost. After the stator outer ring and the stator inner ring 6 are respectively molded, the stator outer ring is heated to increase the inner diameter of the stator outer ring, then the stator inner ring 6 is pressed into the stator outer ring, and the second arc-shaped bulge 61 is positioned in the second arc-shaped notch 51 to enable the stator outer ring and the stator inner ring 6 to be in interference fit to form a complete stator core. The stator outer ring with orientation is sleeved on the stator inner ring 6 without orientation, and the stator outer ring comprises stator teeth 1, namely, the stator teeth 1 are made of oriented materials, so that the magnetic conductivity is enhanced, the iron loss is reduced, and the performance of the motor is improved. The stator outer ring and the stator inner ring are both manufactured by a winding process, so that the manufacturing cost is greatly reduced. The second arc-shaped bulge 61 plays a foolproof role, and ensures that the stator inner ring 6 is installed accurately.
Third embodiment: as shown in fig. 4, a plurality of mounting blocks 7 are connected to the stator yoke 2, and insertion grooves are formed in the mounting blocks 7. The mounting block 7 and the stator yoke 2 are integrally formed and form a stator frame. An insert block 8 is installed in the insert groove. The insert block 8 and the mounting block 7 together form the stator tooth 1. The stator frame is formed by stamping and forming unoriented silicon steel sheets and then winding and laminating, and the manufacturing cost is low. The insert block 8 is formed by high-speed stamping and lamination of oriented silicon steel sheets, the insert block 8 is a part of the stator teeth 1, and the oriented insert block 8 enhances magnetic conductivity, reduces iron loss and improves the performance of the motor. After the stator frame and the insert block 8 are respectively molded, the stator frame is heated to enlarge the size of the insert groove, and then the insert block 8 is pressed into the insert groove to form a complete stator core by interference fit of the stator frame and the insert block 8.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical schemes which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the technical personnel in the field according to the conception of the utility model are within the protection scope of the utility model.
Claims (10)
1. The spliced outer rotor stator comprises a stator core, wherein the stator core comprises a stator yoke (2) and a plurality of stator teeth (1), and is characterized in that materials for forming the stator teeth (1) comprise oriented silicon steel sheets;
the material composing the stator yoke (2) comprises unoriented silicon steel sheets.
2. The spliced outer rotor stator according to claim 1, characterized in that a plurality of mounting blocks (7) are connected to the stator yoke (2), insertion grooves are formed in the mounting blocks (7), the mounting blocks (7) and the stator yoke (2) are integrally formed and form a stator frame, insertion blocks (8) are mounted in the insertion grooves, and the insertion blocks (8) and the mounting blocks (7) jointly form the stator teeth (1);
the stator frame is formed by winding and laminating unoriented silicon steel sheets, the insertion block (8) is formed by laminating oriented silicon steel sheets, and the insertion block (8) is fixed in the insertion groove in an interference mode.
3. The spliced outer rotor stator according to claim 1, wherein the stator yoke (2) is formed by winding and laminating unoriented silicon steel sheets, the stator teeth (1) are formed by laminating oriented silicon steel sheets, a plurality of clamping structures (3) are formed at the end parts of the stator teeth (1), a plurality of clamping groove structures (4) corresponding to the clamping structures (3) are formed on the outer peripheral surface of the stator yoke (2), and the clamping structures (3) are clamped into the clamping groove structures (4) after the stator yoke (2) and the stator teeth (1) are respectively molded.
4. A spliced outer rotor stator according to claim 3, characterized in that the fastening structure (3) comprises a groove (31) and a first mounting leg (32) and a second mounting leg (33) located at two sides of the groove (31), the fastening structure (4) comprises a protruding block (41) and a first mounting groove (42) and a second mounting groove (43) located at two sides of the protruding block (41), the protruding block (41) is fastened into the groove (31), the first mounting leg (32) is fastened into the first mounting groove (42), and the second mounting leg (33) is fastened into the second mounting groove (43).
5. The spliced outer rotor stator of claim 4, wherein the second mounting leg (33) is provided with a first arc-shaped notch (34), the bottom of the second mounting groove (43) is provided with a first arc-shaped protrusion (44), and the first arc-shaped protrusion (44) is positioned in the first arc-shaped notch (34).
6. A spliced outer rotor stator according to claim 4 or 5, characterized in that the recess (31) is dovetail-shaped, the first mounting leg (32) and the second mounting leg (33) are dovetail-shaped, the projection (41) is dovetail-shaped, and the first mounting groove (42) and the second mounting groove (43) are dovetail-shaped.
7. The spliced outer rotor stator according to claim 1, characterized in that the tail parts of a plurality of stator teeth (1) are connected with each other through a connecting ring (5) to form a stator outer ring, a stator inner ring (6) is arranged in the connecting ring (5), and the connecting ring (5) and the stator inner ring (6) jointly form the stator yoke (2);
the stator outer ring is formed by winding and laminating oriented silicon steel sheets, the stator inner ring (6) is formed by winding and laminating unoriented silicon steel sheets, and the stator outer ring is sleeved on the stator inner ring (6) in an interference mode.
8. The spliced outer rotor stator according to claim 7, wherein a plurality of second arc-shaped notches (51) are formed in the inner peripheral surface of the outer stator ring, a plurality of second arc-shaped protrusions (61) are formed in the outer peripheral surface of the inner stator ring (6), and the second arc-shaped protrusions (61) are located in the second arc-shaped notches (51).
9. An electric motor, characterized in that the motor comprises a spliced outer rotor stator according to any one of claims 1-8.
10. The electric motor of claim 9, wherein the electric motor is for an electric vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321774188.6U CN220732439U (en) | 2023-07-06 | 2023-07-06 | Concatenation formula external rotor stator and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321774188.6U CN220732439U (en) | 2023-07-06 | 2023-07-06 | Concatenation formula external rotor stator and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220732439U true CN220732439U (en) | 2024-04-05 |
Family
ID=90526252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321774188.6U Active CN220732439U (en) | 2023-07-06 | 2023-07-06 | Concatenation formula external rotor stator and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220732439U (en) |
-
2023
- 2023-07-06 CN CN202321774188.6U patent/CN220732439U/en active Active
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