CN112186916A - Sectional stator core with tooth part made of oriented silicon steel material - Google Patents
Sectional stator core with tooth part made of oriented silicon steel material Download PDFInfo
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- CN112186916A CN112186916A CN202011147691.XA CN202011147691A CN112186916A CN 112186916 A CN112186916 A CN 112186916A CN 202011147691 A CN202011147691 A CN 202011147691A CN 112186916 A CN112186916 A CN 112186916A
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- stator
- silicon steel
- tooth
- oriented silicon
- punching sheet
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention provides a segmented stator core with a tooth part made of oriented silicon steel material, which comprises a stator yoke, stator teeth and a stator inner ring; the stator yoke and the stator inner ring are made of non-oriented silicon steel materials, and the stator teeth are made of oriented silicon steel materials; the stator yoke is of a circular ring type structure, and a plurality of dovetail grooves are formed in the circular ring of the stator yoke; the upper end part of the stator tooth is provided with a convex end which is embedded with a dovetail groove of the stator yoke, and the lower end part of the stator tooth is provided with a square groove which is embedded with an inner circular ring of the stator; the stator inner circular ring comprises a closed slot punching sheet and an open slot punching sheet, and is formed by laminating spacers of a plurality of closed slot punching sheets and open slot punching sheets; the outer circle edges of the closed slot punching sheet and the open slot punching sheet are provided with a plurality of bosses which are embedded with the square slots. The invention has the advantages of higher structural performance, accurate assembly, simple structure, convenient installation, lower manufacturing cost and more reliable quality, and simultaneously solves the adverse effects of cogging torque and the like of the motor.
Description
Technical Field
The invention relates to a segmented stator core with a tooth part made of oriented silicon steel material, belonging to the technical field of motor stator core structures.
Background
The power-assisted steering device has the characteristics of exquisite and compact structure, energy conservation, environmental protection and the like, and is the most humanized product in the current power-assisted steering of the automobile.
The electric power steering system is additionally provided with a steering angle and torque sensor, an electronic controller system (ECU), a brushless motor and other components on the basis of the traditional mechanical power steering system to realize the function of auxiliary power assistance through electric drive, and is a new generation of electromechanical integrated automobile intelligent power steering system, and the motor is used as a key component of the power assembly.
Disclosure of Invention
In order to solve the technical problems, the invention provides the segmented stator core with the tooth part made of the oriented silicon steel material, and the segmented stator core with the tooth part made of the oriented silicon steel material improves the performance of the motor, and reduces the manufacturing cost and the precision requirement of the assembly process.
The invention is realized by the following technical scheme.
The invention provides a segmented stator core with a tooth part made of oriented silicon steel material, which comprises a stator yoke, stator teeth and a stator inner ring; the stator yoke and the stator inner ring are made of non-oriented silicon steel materials, and the stator teeth are made of oriented silicon steel materials; the stator yoke is of a circular ring type structure, and a plurality of dovetail grooves are formed in the circular ring of the stator yoke; the upper end part of the stator tooth is provided with a convex end which is embedded with a dovetail groove of the stator yoke, and the lower end part of the stator tooth is provided with a square groove which is embedded with an inner circular ring of the stator; the stator inner circular ring comprises a closed slot punching sheet and an open slot punching sheet, and is formed by laminating spacers of a plurality of closed slot punching sheets and open slot punching sheets; the outer circle edges of the closed slot punching sheet and the open slot punching sheet are provided with a plurality of bosses which are embedded with the square slots; and assembling the stator yoke, the stator teeth and the stator inner ring to form a complete stator core.
The dovetail grooves are evenly distributed along the inner edge of the circular ring of the stator yoke.
The number of the stator teeth is equal to that of the dovetail grooves.
The stator yoke is formed by laminating a plurality of stator yoke punching sheets.
The stator teeth are formed by laminating a plurality of stator tooth punching sheets.
And the punching sheet rolling direction of the stator tooth punching sheet is radially superposed with the stator tooth.
The number of the bosses is equal to that of the square grooves.
And processing and removing the connection part of the tooth tips at every interval of the punching sheets of the inner ring of the stator to form a closed slot punching sheet with the connection part of the tooth tips and an open slot punching sheet with the connection part of the tooth tips removed.
The invention has the beneficial effects that: the split structure of the tooth part and the yoke part is adopted, so that the high slot filling rate of the motor winding is ensured; the integral stator inner circle ring structure is adopted, the roundness of the stator inner circle is guaranteed to a certain extent, and the problem of overlarge tooth socket torque caused by non-concentricity between tooth blocks is solved; the inner circular ring of the stator adopts two groove structures, the closed groove can reduce the tooth space effect caused by the groove opening, the tooth space torque is reduced, and the open groove structure reduces the magnetic leakage effect; the stator teeth are made of oriented silicon steel materials, compared with non-oriented silicon steel materials, the magnetic materials have strong directionality, the material has excellent high magnetic conductivity and low loss characteristics in the easy-magnetization rolling direction, the knee point of a magnetization curve along the rolling direction can reach 1.8T, and the stator tooth punching plates are made of oriented silicon steel materials, so that the saturation magnetic density of the tooth parts can be effectively improved, and the cogging torque caused by the saturation of the tooth parts can be weakened while the torque density of the motor is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a stator yoke lamination of the present invention;
FIG. 3 is a schematic structural view of a stator tooth punching sheet according to the present invention;
FIG. 4 is a schematic view of a stator tooth according to the present invention;
FIG. 5 is a structural schematic view of the stator tooth orientation of the present invention;
FIG. 6 is a schematic structural view of a closed slot punching sheet according to the present invention;
FIG. 7 is a schematic structural diagram of an open slot punching sheet of the present invention;
FIG. 8 is a map of the distribution of spot welds of the present invention;
in the figure: 1-stator yoke, 11-dovetail groove, 2-stator tooth, 21-protruding end, 22-square groove, 3-stator inner circular ring, 31-closed groove punching sheet, 311-tooth tip connecting part, 312-boss, 32-open groove punching sheet and 5-spot welding.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, 4, 6 and 7, a segmented stator core with a tooth portion made of oriented silicon steel material includes a stator yoke 1, stator teeth 2 and a stator inner ring 3; the stator yoke 1 and the stator inner ring 3 are made of non-oriented silicon steel materials, and the stator teeth 2 are made of oriented silicon steel materials (such as grain-oriented silicon steel materials); the stator yoke 1 is of a circular ring structure, a plurality of dovetail grooves 11 are formed in a circular ring of the stator yoke 1, and the dovetail grooves 11 are embedded with the protruding ends 21 of the stator teeth 2 to form a complete iron core; the upper end part of the stator tooth 2 is provided with a convex end 21 which is embedded with the dovetail groove 11 of the stator yoke 1, so that the tooth part and the yoke part are embedded with each other conveniently, and the lower end part is provided with a square groove 22 which is embedded with the stator inner circular ring 3, so that the stator inner circular ring 3 is embedded conveniently; the stator inner circular ring 3 comprises a closed slot punching sheet 31 and an open slot punching sheet 32, the stator inner circular ring 3 is formed by laminating a plurality of closed slot punching sheets 31 and open slot punching sheets 32 by spacers, and the assembled complete stator core is in a structure that the open slot punching sheets and the closed slot punching sheets are alternately laminated; the outer circle edges of the closed slot punching sheet 31 and the open slot punching sheet 32 are provided with a plurality of bosses 312 which are used for being embedded with the square slots 22; and assembling the stator yoke 1, the stator teeth 2 and the stator inner ring 3 to form a complete stator core.
Furthermore, the stator yoke 1, the stator teeth 2 and the stator inner ring 3 are formed by laminating high-magnetic-conductance silicon steel sheets, so that eddy current loss is reduced.
Preferably, the stator teeth 2 are made of oriented silicon steel (such as grain-oriented silicon steel), and compared with non-oriented silicon steel, the material has strong magnetic properties, excellent high magnetic permeability and low loss characteristics in the easy-magnetization rolling direction, and the saturation magnetic density is generally higher than that of the non-oriented silicon steel; secondly, the non-oriented silicon steel sheet can be regarded as the same magnetic characteristic in all directions, the knee point of the magnetization curve is generally 1.6T, while the oriented silicon steel sheet is produced by orderly arranging the crystal grains of the material through a certain process, so that the rolling direction of the oriented silicon steel sheet is different from the magnetic characteristic perpendicular to the rolling direction (namely the shearing direction), the knee point of the magnetization curve along the rolling direction can reach 1.8T, and the shearing direction is about 1.4T.
The dovetail grooves 11 are uniformly distributed along the inner edge of the circular ring of the stator yoke 1.
The number of the stator teeth 2 is equal to that of the dovetail grooves 11.
The stator yoke 1 is formed by laminating a plurality of stator yoke punching sheets, as shown in fig. 2.
The stator teeth 2 are formed by laminating a plurality of stator tooth punching sheets, as shown in fig. 3.
The punching sheet rolling direction of the stator tooth punching sheet is radially superposed with that of the stator teeth 2, as shown in fig. 5, the direction of the magnetic force line on the stator teeth 2 is consistent with the high magnetic conductivity direction of the oriented silicon steel material, so that the aim of improving the saturation magnetic density of the stator teeth of the motor is achieved, the torque density of the motor in unit volume is further improved, the performance of the motor is improved, the usage amount of the stator core punching sheet is reduced, and the cost of the motor is reduced.
The number of the bosses 312 is equal to that of the square grooves 22.
The inner ring 3 of the stator is provided with punching sheets at intervals, the tooth tip connecting part 311 is machined and removed, and a closed slot punching sheet 31 with the tooth tip connecting part 311 and an open slot punching sheet 32 with the tooth tip connecting part 311 removed are formed.
Preferably, the complete annular structure of the closed slot punching sheet 31 ensures the inner circle roundness of the stator, but at the same time, the punching sheet is determined to be only made of non-oriented silicon steel material; after the ring 3 of the stator is laminated, the tooth point connecting part 311 is machined and removed from every other punching sheet to form an open slot punching sheet 32.
Further, the closed slot punching sheet 31 can avoid the cogging effect caused by the open slot, correspondingly weaken the cogging torque, and the open slot punching sheet 32 can reduce the magnetic leakage effect.
Specifically, the assembly process of the present invention is as follows:
firstly, respectively loading injection-molded slot insulation into two ends of a laminated stator tooth 2, wherein the slot insulation is divided into an upper interface and a lower interface;
secondly, winding enameled wires on the stator teeth 2 with the insulation, and embedding the stator teeth 2 subjected to coil inserting with a stator yoke 1 and a stator inner circular ring 3 by adopting a tool to form a complete stator core;
after the three parts are embedded, spot welding 5 is carried out on the central position of the joint of the tooth parts and the yoke parts of the upper end surface and the lower end surface of the stator core, as shown in fig. 8, the three parts are axially fixed and cannot fall off due to dislocation, the stator core is ensured to be tightly connected, and the connection strength between the stator core and the yoke parts is improved;
and fourthly, the stator core is arranged in the casing, and the core and the casing are in interference fit.
In conclusion, the invention changes the original block type iron core structure into the combined type stator iron core structure, ensures the roundness of the inner circle of the stator iron core, improves the performance of the motor by adopting the oriented silicon steel sheet, reduces the using amount of the stator iron core punching sheet, comprehensively utilizes the advantages of two groove structures, has the characteristics of higher structural performance, simple structure, convenient installation, accurate positioning, high performance, lower manufacturing cost and more reliable quality, and simultaneously solves the adverse effects of the cogging torque of the motor and the like.
Claims (8)
1. The utility model provides a tooth adopts sectional type stator core that has oriented silicon steel material, includes stator yoke (1), stator tooth (2), stator inner ring (3), its characterized in that: the stator yoke (1) and the stator inner ring (3) are made of non-oriented silicon steel materials, and the stator teeth (2) are made of oriented silicon steel materials; the stator yoke (1) is of a circular ring type structure, and a plurality of dovetail grooves (11) are formed in the circular ring of the stator yoke (1); the upper end part of the stator tooth (2) is provided with a convex end (21) which is embedded with the dovetail groove (11) of the stator yoke (1), and the lower end part is provided with a square groove (22) which is embedded with the stator inner circular ring (3); the stator inner circular ring (3) comprises a closed slot punching sheet (31) and an open slot punching sheet (32), and the stator inner circular ring (3) is formed by laminating a plurality of closed slot punching sheets (31) and open slot punching sheets (32) through spacers; the outer circle edges of the closed slot punching sheet (31) and the open slot punching sheet (32) are respectively provided with a plurality of bosses (312) which are used for being embedded with the square slots (22); and assembling the stator yoke (1), the stator teeth (2) and the stator inner ring (3) to form a complete stator core.
2. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 1, wherein: the dovetail grooves (11) are uniformly distributed along the inner edge of the circular ring of the stator yoke (1).
3. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 1, wherein: the number of the stator teeth (2) is equal to that of the dovetail grooves (11).
4. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 1, wherein: the stator yoke (1) is formed by laminating a plurality of stator yoke punching sheets.
5. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 1, wherein: the stator teeth (2) are formed by laminating a plurality of stator tooth punching sheets.
6. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 5, wherein: the punching sheet rolling direction of the stator tooth punching sheet is radially superposed with that of the stator teeth (2).
7. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 1, wherein: the number of the bosses (312) is equal to that of the square grooves (22).
8. The segmented stator core having an oriented silicon steel material for a tooth portion as claimed in claim 1, wherein: and processing and removing the tooth tip connection part (311) every time a punching sheet is arranged on the inner circular ring (3) of the stator at intervals to form a closed slot punching sheet (31) with the tooth tip connection part (311) and an open slot punching sheet (32) with the tooth tip connection part (311) removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147691.XA CN112186916A (en) | 2020-10-23 | 2020-10-23 | Sectional stator core with tooth part made of oriented silicon steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011147691.XA CN112186916A (en) | 2020-10-23 | 2020-10-23 | Sectional stator core with tooth part made of oriented silicon steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112186916A true CN112186916A (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011147691.XA Pending CN112186916A (en) | 2020-10-23 | 2020-10-23 | Sectional stator core with tooth part made of oriented silicon steel material |
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| Country | Link |
|---|---|
| CN (1) | CN112186916A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688445A (en) * | 2021-03-11 | 2021-04-20 | 江苏嘉轩智能工业科技股份有限公司 | Stator of outer rotor motor and assembling method thereof |
| CN112865467A (en) * | 2021-04-13 | 2021-05-28 | 山东大学 | Combined stator core claw pole transverse flux permanent magnet brushless motor structure and method thereof |
-
2020
- 2020-10-23 CN CN202011147691.XA patent/CN112186916A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112688445A (en) * | 2021-03-11 | 2021-04-20 | 江苏嘉轩智能工业科技股份有限公司 | Stator of outer rotor motor and assembling method thereof |
| CN112865467A (en) * | 2021-04-13 | 2021-05-28 | 山东大学 | Combined stator core claw pole transverse flux permanent magnet brushless motor structure and method thereof |
| CN112865467B (en) * | 2021-04-13 | 2022-08-02 | 山东大学 | Combined stator core claw pole transverse flux permanent magnet brushless motor structure and method thereof |
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