CN210669650U - Tooth yoke separated permanent magnet motor stator core and permanent magnet motor - Google Patents
Tooth yoke separated permanent magnet motor stator core and permanent magnet motor Download PDFInfo
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- CN210669650U CN210669650U CN201921915035.2U CN201921915035U CN210669650U CN 210669650 U CN210669650 U CN 210669650U CN 201921915035 U CN201921915035 U CN 201921915035U CN 210669650 U CN210669650 U CN 210669650U
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Abstract
The utility model discloses a tooth yoke disconnect-type permanent-magnet machine stator core and permanent-magnet machine for it is not high to solve current tooth yoke disconnect-type closed slot motor groove fullness rate, must adopt purpose-built insulating skeleton to lead to motor manufacturing cost height and the inefficiency scheduling problem of motor preparation. The stator core comprises a stator yoke part and a stator tooth part, wherein the stator yoke part is composed of a plurality of stator yoke part modules; the stator tooth part comprises stator teeth and tooth shoes, two adjacent stator teeth are connected through tooth shoe shoulders, and a stator slot with a closed slot opening is formed between the two adjacent stator teeth and the tooth shoes; the stator yoke module is provided with convex teeth, the top surfaces of the stator teeth are provided with grooves, and the stator yoke is connected with the stator tooth part of the integrated structure through the convex teeth and the grooves in an embedded mode.
Description
Technical Field
The invention relates to the technical field of permanent magnet servo motors, in particular to a tooth yoke separated permanent magnet motor stator core and a permanent magnet motor.
Background
Because the permanent magnet motor has higher power density, the permanent magnet motor is widely applied to the field of servo. However, the mutual action of the magnetic steel and the cogging affects the torque performance and control accuracy of the motor, so the cogging torque is always a problem to be solved when designing the permanent magnet motor. The existing common method mainly comprises the steps of optimizing the structural size of the magnetic steel or the tooth space and the method of inclined pole of the inclined groove. For a servo motor with smaller capacity and volume, the structure size of the motor is limited, and a method of a closed slot can be adopted to restrain the cogging torque of the motor and improve the torque output performance of the motor and the user experience. According to the automation level of the current manufacturing industry, the traditional stator core integrated closed slot motor is obviously not beneficial to automation and large-scale production, so that a stator side core of the motor needs to be specially designed, the process is easy to realize, the automation large-scale production is easy, and the power density of the motor can be further improved.
The Riben Anchuan motor, as a globally known servo manufacturer, firstly provides a design scheme of a tooth yoke separation type closed slot product and shows excellent electromagnetic performance. As shown in fig. 1, the stator core 10 includes a stator yoke 11 and stator teeth 12, the stator yoke 11 and the stator teeth 12 are integrated with each other, and the upper portion of the stator teeth 12 is attached to the stator yoke 11, that is, so-called tooth yoke separation; the stator tooth portions 12 and the stator yoke portions 11 are respectively integrally punched and manufactured by a punch, and notches corresponding to armature grooves formed by adjacent teeth are closed. The scheme can effectively weaken the cogging torque and improve the output performance of the motor torque. However, this solution has the following problems: 1. the process is complex to realize, the assembly efficiency is low if manual assembly is adopted, and the manufacturing cost of the motor is obviously increased if automatic operation of a machine is adopted; 2. in order to facilitate nesting of iron cores of yoke parts of the rotor, the slot fullness rate of the motor cannot be very high, so that the space utilization rate of the slots of the stator of the motor is low; 3. in order to facilitate nesting of the iron cores of the yoke parts of the rotor, the insulating frameworks 14 of the windings 13 only can adopt special integrally formed frameworks, and other types of insulating frameworks cannot be adopted, so that the manufacturing cost of the motor is high.
After that, the japan sanyo motor is also gradually advancing a servo motor product of a similar tooth-yoke separation type closed slot design. At present, a domestic novel servo motor design scheme is developed and explored by depending on the domestic existing manufacturing level and processing technology, and the method has important significance for developing domestic servo products and improving the competitiveness of the domestic servo products.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the slot fullness rate of the existing tooth yoke separated closed slot motor is not high and the motor manufacturing cost is high due to the fact that a special insulation framework is required to be adopted, the application provides a tooth yoke separated permanent magnet motor stator core and a permanent magnet motor.
The technical scheme adopted by the application is as follows:
the application provides a tooth yoke separation type permanent magnet motor stator core which comprises a stator yoke part and a stator tooth part, wherein the stator yoke part is composed of a plurality of stator yoke part modules; the stator tooth part comprises stator teeth and tooth shoes, two adjacent stator teeth are connected through tooth shoe shoulders, and a stator slot with a closed slot opening is formed between the two adjacent stator teeth and the tooth shoes; the stator yoke module is provided with convex teeth, the top surfaces of the stator teeth are provided with grooves, and the stator yoke is connected with the stator tooth part of the integrated structure through the convex teeth and the grooves in an embedded mode.
Further, when k is 1, the stator yoke is composed of n yoke modules when k is 1; wherein, n is the motor tooth number, and k is the space mechanical angle ratio that motor stator yoke module and groove pitch angle correspond, satisfies n between n and the k and can be divided by k wholely, and n ≠ k.
Furthermore, the central part of the stator yoke module is provided with convex teeth, the stator yoke module is symmetrical about the central line of the stator slot, and the joint part of two adjacent stator yoke modules is the central line of the stator slot.
Furthermore, two ends of each stator yoke module are respectively provided with half convex teeth, the stator yoke modules are symmetrical about the central line of the stator teeth, the joint part of the adjacent stator yoke modules is the central line of the stator teeth, and the two half convex teeth form one convex tooth.
Further, when k >1, the stator yoke is composed of n/k yoke modules, each yoke module comprises k modular units with the same structure; wherein, n is the motor tooth number, and k is the space mechanical angle ratio that motor stator yoke module and groove pitch angle correspond, satisfies n between n and the k and can be divided by k wholely, and n ≠ k.
Furthermore, the center of the module unit is provided with a convex tooth, the module unit is symmetrical about the center line of the stator tooth, and the joint part of two adjacent stator yoke modules is the center line of the stator slot.
Furthermore, two ends of the module unit are respectively provided with half convex teeth, the two half convex teeth form one convex tooth, the module unit is symmetrical about the center line of the stator slot, and the joint part of two adjacent stator yoke modules is the center line of the stator tooth.
The application provides a radial permanent-magnet machine is equipped with above-mentioned tooth boots disconnect-type permanent-magnet machine stator core, stator core is arranged the stator yoke portion that constitutes and the radial gomphosis of the stator tooth portion of integral type structure by the radial annular of stator yoke portion module and is connected and constitute.
The application provides an axial permanent-magnet machine is equipped with above-mentioned tooth boots disconnect-type permanent-magnet machine stator core, stator yoke portion that stator core comprises stator yoke portion module axial annular range is connected with the stator tooth axial gomphosis of integral type structure and is constituteed.
The application provides a plane permanent-magnet machine is equipped with above-mentioned tooth boots disconnect-type permanent-magnet machine stator core, stator core is connected with the straight line form stator tooth portion gomphosis of integral type structure by the straight line form stator yoke portion that stator yoke portion module linear arrangement constitutes.
The utility model has the advantages that:
1. compared with an open slot permanent magnet motor, the motor of the topological scheme has smaller cogging torque and torque ripple and has good torque output characteristic;
2. compared with the integral tooth yoke separation topological design scheme, the motor of the topological scheme has the advantages that certain pressure is applied in the assembling process, the armature winding and arranging wire is more compact, the utilization rate of the slot space is higher, and the slot fullness rate and the power density of the motor can be further improved.
3. Compared with the integral tooth yoke separation topological design scheme, the motor adopting the topological scheme is convenient to install and high in efficiency in the assembling process, and can fill up the technical blank in the field in China.
Drawings
Fig. 1 is a schematic structural view illustrating a conventional ann-chuan-tooth-yoke split type permanent magnet motor stator core.
Fig. 2 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a first embodiment of the present application.
Fig. 3 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a second embodiment of the present application.
Fig. 4 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a third embodiment of the present invention.
Fig. 5 is a schematic view showing a structure of a stator core of a permanent magnet motor of a tooth-yoke separation type according to a fourth embodiment of the present invention.
Fig. 6 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a fifth embodiment of the present invention.
Fig. 7 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a sixth embodiment of the present invention.
Fig. 8 is a schematic view showing a structure of a stator core of a permanent magnet motor of a split tooth-yoke type according to a seventh embodiment of the present invention.
Fig. 9 is a schematic view showing a structure of a stator core of a permanent magnet motor of a tooth-yoke separation type according to an eighth embodiment of the present invention.
Fig. 10 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a ninth embodiment of the present application.
Fig. 11 is a schematic view showing a structure of a tooth-yoke split permanent magnet motor stator core according to a tenth embodiment of the present application.
Fig. 12 is a schematic view showing a structure of a stator core of a permanent magnet motor of a tooth-yoke separation type according to an eleventh embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the following description of the present invention will clearly and completely describe the technical solutions of the present invention by taking a three-phase motor as an example, in conjunction with the accompanying drawings and preferred embodiments.
In the following embodiments, m is the number of motor coil phases, n is the number of stator teeth, and k is the spatial mechanical angle ratio of the motor stator yoke module to the slot pitch angle.
Example one
Referring to fig. 2, a tooth yoke separated permanent magnet motor stator core includes a stator yoke 1 composed of a plurality of stator yoke modules and a stator tooth 2 of an integrated structure; the stator tooth portion 2 comprises stator teeth 21 and tooth shoes 22, two adjacent stator teeth are connected through tooth shoe shoulders 222, and a stator slot 3 with a closed slot opening is formed between two adjacent stator teeth 21 and tooth shoes 22. The stator yoke module 11 is provided with convex teeth 111, the top surfaces of the stator teeth 21 are provided with grooves 211, and the stator yoke 1 and the stator tooth part 2 of the integrated structure are connected through the convex teeth 111 and the grooves 211 in an embedded mode.
In this embodiment, m is 3, n is 12, and k is 1; the stator yoke 1 is formed of n/k 12, i.e. twelve radial annular arrangements of stator yoke modules 11, each occupying a 30 ° spatial angle. The bottom center of the stator yoke module 11 is provided with a convex tooth 111, and the stator yoke module 11 is symmetrical with respect to the tooth center line of the stator teeth 21. The symmetrically designed stator modules are stressed uniformly, and the assembled motor runs stably and has excellent performance. Twelve yoke modules 11 are spliced to form a stator core yoke 1 of the radial rotating motor, and two adjacent stator yoke modules 11 are attached to the center line of the stator slot 3. The depth of the groove 211 is less than half of the height of the stator teeth 21, and the convex teeth 111 are connected with the groove 211 in a shallow embedding manner.
In other embodiments, the stator yoke modules 11 may also be arranged axially and annularly, and are connected with the stator teeth 2 of the integrated structure through axial embedding to form a stator core of the axial rotating motor; alternatively, the stator yoke modules 11 are linearly arranged and are connected to the linear stator teeth 2 of the integrated structure in a fitting manner to form a stator core of the flat motor.
In this embodiment, the cross-sections of the teeth 111 and the grooves 211 are triangular, and in other embodiments, the cross-sections of the teeth and the grooves may also be trapezoidal, rectangular, or arc.
Example 2
Referring to fig. 3, the technical solution of embodiment 2 is substantially the same as that of embodiment 1, except that the cross sections of the protruding teeth 111 and the grooves 211 are rectangular, the depth of the grooves 211 is greater than one half of the height of the stator teeth 21, and the stator yoke 1 and the stator teeth 2 of the integrated structure are deeply inserted into the grooves 211 through the protruding teeth 111.
Example 3
Referring to fig. 4, the technical solution of embodiment 3 is substantially the same as that of embodiment 1, except that the stator yoke 1 is formed by radially and annularly arranging twelve stator yoke modules 12, two end portions of the bottom surface of each stator yoke module 12 are respectively provided with half convex teeth, the stator yoke modules 12 are symmetrical with respect to the slot center line of the stator slot 22, two half convex teeth form a convex tooth 111 after two adjacent stator yoke modules 12 are combined together, and the stator yoke 1 and the stator teeth 2 of the integrated structure are in shallow-fitting connection with the grooves 211 through the convex teeth 111.
Example 4
Referring to fig. 5, the technical solution of embodiment 4 is substantially the same as that of embodiment 1, except that m is 3, n is 12, and k is 2; the stator yoke portion 1 is 6 by n/k, six stator yoke portion modules 11 constitute promptly, and every yoke portion module accounts for 60 space angle, and is symmetrical about the stator slot central line, and two adjacent stator yoke portion modules are laminated at 60 stator slot central lines of striding mutually, form whole stator core yoke portion after six stator yoke portion modules splice is accomplished. Each stator yoke module 11 comprises two module units 110 with the same structure, a convex tooth 111 matched with a stator tooth top groove 211 is arranged at the center of the bottom surface of each module unit, and the stator yoke 1 and the stator tooth part 2 with the integrated structure are connected with the groove 211 in a shallow embedding manner through the convex tooth 111.
Example 5
Referring to fig. 6, the technical solution of embodiment 5 is substantially the same as that of embodiment 4, except that the stator yoke 1 is composed of six stator yoke modules 12, each stator yoke module 12 includes two module units 120 with the same structure, two ends of the bottom surface of each module unit are provided with half convex teeth, the two half convex teeth are combined together to form a convex tooth 111 matched with a groove 211 on the top surface of the stator tooth, and the stator yoke 1 and the stator teeth 2 with an integrated structure are in shallow-fitting connection with the groove 211 through the convex tooth 111.
Example 6
Referring to fig. 7, the technical solution of embodiment 6 is substantially the same as that of embodiment 1, except that m is 3, n is 12, and k is 3; the stator yoke portion 1 is 4 by n/k, and four stator yoke portion modules 11 constitute promptly, and every yoke portion module accounts for 90 space angle, and is symmetrical about the stator slot central line, and two adjacent stator yoke portion modules are in 90 stator slot central line department laminating of striding mutually, forms whole stator core yoke portion 1 after four stator yoke portion modules 11 splice are accomplished. Each stator yoke module 11 comprises three module units 110 with the same structure, a convex tooth 111 matched with a stator tooth top groove 211 is arranged at the center of the bottom surface of each module unit, and the stator yoke 1 and the stator tooth part 2 with the integrated structure are connected with the groove 211 in a shallow embedding manner through the convex tooth 111.
Example 7
Referring to fig. 8, the technical solution of embodiment 7 is substantially the same as that of embodiment 6, except that the stator yoke 1 is composed of four stator yoke modules 12, each stator yoke module 12 includes two module units 120 with the same structure, two ends of the bottom surface of each module unit are provided with half convex teeth, the two half convex teeth are combined together to form a convex tooth 111 adapted to a groove 211 on the top surface of the stator tooth, and the stator yoke 1 and the stator teeth 2 with the integrated structure are in shallow-fitting connection with the groove 211 through the convex tooth 111.
Example 8
Referring to fig. 9, the embodiment 8 is basically the same as that of embodiment 1, except that m is 3, n is 12, and k is 4; the stator yoke portion 1 is 3 by n/k, three stator yoke portion modules 11 constitute promptly, and every yoke portion module accounts for 120 space angle, and is symmetrical about the stator slot central line, and two adjacent stator yoke portion modules are in the laminating of striding 120 stator slot central lines mutually, forms whole stator core yoke portion 1 after three stator yoke portion modules 11 splice is accomplished. Each stator yoke module 11 comprises four module units 110 with the same structure, a convex tooth 111 matched with a stator tooth top groove 211 is arranged at the center of the bottom surface of each module unit, and the stator yoke 1 and the stator tooth part 2 with the integrated structure are connected with the groove 211 in a shallow embedding manner through the convex tooth 111.
Example 9
Referring to fig. 10, the technical solution of embodiment 9 is substantially the same as that of embodiment 8, except that the stator yoke 1 is composed of three stator yoke modules 12, each stator yoke module 12 includes two module units 120 with the same structure, two ends of the bottom surface of each module unit are provided with half convex teeth, the two half convex teeth are combined together to form a convex tooth 111 adapted to a groove 211 on the top surface of the stator tooth, and the stator yoke 1 and the stator teeth 2 with an integrated structure are in shallow-fitting connection with the groove 211 through the convex tooth 111.
Example 10
Referring to fig. 11, the embodiment 10 is basically the same as that of embodiment 1, except that m is 3, n is 12, and k is 6; the stator yoke 1 is composed of n/k 2, namely two stator yoke modules 11, each yoke module occupies 180 degrees of space angle, and is symmetrical about a stator slot center line, two adjacent stator yoke modules are attached at the position of crossing 180 degrees of the stator slot center line, and the two stator yoke modules 11 are spliced to form the whole stator core yoke 1. Each stator yoke module 11 comprises six module units 110 with the same structure, a convex tooth 111 matched with a stator tooth top groove 211 is arranged at the center of the bottom surface of each module unit, and the stator yoke 1 and the stator tooth part 2 with the integrated structure are connected with the groove 211 in a shallow embedding manner through the convex tooth 111.
Example 11
Referring to fig. 12, the technical solution of the embodiment 11 is substantially the same as that of the embodiment 10, except that the stator yoke 1 is composed of two stator yoke modules 12, each stator yoke module 12 includes two module units 120 with the same structure, two ends of the bottom surface of each module unit are provided with half convex teeth, the two half convex teeth are combined together to form a convex tooth 111 matched with a groove 211 on the top surface of the stator tooth, and the stator yoke 1 and the stator teeth 2 with the integrated structure are in shallow-fitting connection with the groove 211 through the convex tooth 111.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A tooth yoke separation type permanent magnet motor stator core is characterized by comprising a stator yoke part and a stator tooth part, wherein the stator yoke part is composed of a plurality of stator yoke part modules; the stator tooth part comprises stator teeth and tooth shoes, two adjacent stator teeth are connected through tooth shoe shoulders, and a stator slot with a closed slot opening is formed between the two adjacent stator teeth and the tooth shoes; the stator yoke module is provided with convex teeth, the top surfaces of the stator teeth are provided with grooves, and the stator yoke is connected with the stator tooth part of the integrated structure through the convex teeth and the grooves in an embedded mode.
2. The split-yoke permanent magnet motor stator core according to claim 1, wherein the stator yoke is composed of n yoke modules when k is 1; wherein, n is the motor tooth number, and k is the space mechanical angle ratio that motor stator yoke module and groove pitch angle correspond, satisfies n between n and the k and can be divided by k wholely, and n ≠ k.
3. The split-yoke permanent magnet motor stator core according to claim 1, wherein when k >1, the stator yoke is composed of n/k yoke modules, each yoke module comprising k identically structured module units; wherein, n is the motor tooth number, and k is the space mechanical angle ratio that motor stator yoke module and groove pitch angle correspond, satisfies n between n and the k and can be divided by k wholely, and n ≠ k.
4. The split-tooth-yoke permanent magnet motor stator core according to claim 2, wherein the central portion of the stator yoke module is provided with convex teeth, the stator yoke module is symmetrical about a stator slot center line, and the joint of two adjacent stator yoke modules is the stator slot center line.
5. The split-tooth-yoke permanent magnet motor stator core according to claim 2, wherein half teeth are respectively formed at both ends of the stator yoke module, the stator yoke module is symmetrical with respect to a stator tooth center line, a joint of adjacent stator yoke modules is the stator tooth center line, and one tooth is formed by two half teeth.
6. The split-tooth-yoke permanent magnet motor stator core according to claim 3, wherein the module units are provided with convex teeth at the central parts, the module units are symmetrical about the center line of the stator teeth, and the joint of two adjacent stator yoke modules is the center line of the stator slot.
7. The split-tooth-yoke permanent magnet motor stator core according to claim 3, wherein half teeth are respectively formed at both ends of the module unit, the half teeth form a tooth, the module unit is symmetrical with respect to a stator slot center line, and a joint of two adjacent stator yoke modules is a stator tooth center line.
8. A radial permanent magnet motor is characterized in that a tooth-shoe separation type permanent magnet motor stator core as claimed in any one of claims 1 to 7 is provided, and the stator core is formed by radially and annularly arranging stator yoke modules to form a stator yoke and radially embedding and connecting stator teeth of an integrated structure.
9. An axial permanent magnet motor, characterized in that, a tooth-shoe separation type permanent magnet motor stator core as claimed in any one of claims 1 to 7 is provided, the stator core is formed by axially and annularly arranging stator yoke modules and axially embedding and connecting stator teeth of an integrated structure.
10. A planar permanent magnet motor, characterized in that, a tooth-shoe separation type permanent magnet motor stator core as claimed in any one of claims 1 to 7 is provided, the stator core is formed by the jogged connection of a linear stator yoke part formed by the linear arrangement of stator yoke part modules and a linear stator tooth part of an integrated structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921915035.2U CN210669650U (en) | 2019-11-07 | 2019-11-07 | Tooth yoke separated permanent magnet motor stator core and permanent magnet motor |
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| CN201921915035.2U CN210669650U (en) | 2019-11-07 | 2019-11-07 | Tooth yoke separated permanent magnet motor stator core and permanent magnet motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366845A (en) * | 2020-12-17 | 2021-02-12 | 哈尔滨理工大学 | High-efficiency back-wound winding tooth-groove-free permanent magnet synchronous motor |
| CN114552808A (en) * | 2022-04-28 | 2022-05-27 | 佛山非夕机器人科技有限公司 | Stator core, stator and motor |
| WO2023097919A1 (en) * | 2021-12-03 | 2023-06-08 | 广东美芝制冷设备有限公司 | Stator, electric motor, compressor, and refrigeration apparatus |
-
2019
- 2019-11-07 CN CN201921915035.2U patent/CN210669650U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366845A (en) * | 2020-12-17 | 2021-02-12 | 哈尔滨理工大学 | High-efficiency back-wound winding tooth-groove-free permanent magnet synchronous motor |
| WO2023097919A1 (en) * | 2021-12-03 | 2023-06-08 | 广东美芝制冷设备有限公司 | Stator, electric motor, compressor, and refrigeration apparatus |
| CN114552808A (en) * | 2022-04-28 | 2022-05-27 | 佛山非夕机器人科技有限公司 | Stator core, stator and motor |
| CN114552808B (en) * | 2022-04-28 | 2022-07-19 | 佛山非夕机器人科技有限公司 | Stator core, stator and motor |
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