Coreless net-shaped (grating) brushless motor stator

Abstract

The invention provides a coreless net-shaped (grating) brushless motor stator, which comprises a cylindrical stator winding ring, the stator winding ring is formed by arranging and splicing a plurality of conductive rings at intervals along the circumferential direction, each conductive ring comprises a first conductive strip and a second conductive strip, the first conductive strips and the second conductive strips are mutually stacked along the radial direction of the stator winding ring, and the first conductive strips and the second conductive strips are mutually stacked along the radial direction of the stator winding ring. The first conductive strip and the second conductive strip are both of a non-straight-strip-shaped structure, the two ends of the first conductive strip are matched with the two ends of the second conductive strip respectively, and the first conductive strip and the second conductive strip are connected to form a semi-annular structure. According to the motor stator, an iron core and a tooth groove in a traditional stator are eliminated, so that the problems of non-uniform magnetic field distribution, large electromagnetic noise, high iron loss and the like are solved; the high-speed motor has the advantages of being smooth in starting, high in speed, stable in operation, low in noise, high in efficiency, large in power density, high in precision, small in size, light in weight, capable of saving more materials and the like, and a middle hole can be made to be larger so that thicker and more cables can penetrate through the middle hole conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly, to a coreless mesh (grille) brushless motor stator. Background Art

[0002] At present, the brushless motor stators on the market are usually composed of stators (silicon steel sheets) and enameled wires, forming a wound stator with a core. In this structure, the core is composed of various metal materials, and the enameled wires are embedded or directly wound into the stator manually and mechanically. The core and the enameled wires are combined into an integral component and then used in cooperation with the rotor. However, there are many problems in this traditional structure: First, the starting speed of the motor is slow and not smooth enough, and the speed regulation process is not smooth enough. This is mainly due to the uneven magnetic field distribution caused by the core structure. Second, the motor will generate a large amount of electromagnetic noise during operation, affecting the user experience and the working environment. In addition, there are many magnetic field harmonics, resulting in unstable operation of the motor, reduced efficiency, and increased energy loss.

[0003] The existence of the core tooth-slot structure also brings a series of problems. It not only causes a large rotational pulsation, affecting the smooth operation of the motor, but also limits the thickness of the enameled wires used. Most of these are production and processing problems caused by low slot fill factor or too high slot fill factor. Thus, it restricts the further improvement of the motor efficiency. At the same time, the stator is prone to magnetic leakage, further reducing the overall performance of the motor.

[0004] Iron loss is another problem that cannot be ignored. Due to the existence of the core material, the motor will generate a large amount of iron loss during operation, directly affecting the efficiency of the motor. This not only increases energy consumption, but also may cause the motor to overheat and shorten its service life.

[0005] From a structural perspective, the overall weight of the traditional core brushless motor stator is relatively large. This not only increases the material cost, but also limits the use of the motor in some weight-sensitive application scenarios. The relatively large weight also means a relatively large moment of inertia, which has an adverse impact on the starting characteristics and dynamic response of the motor. And the hidden energy consumption costs behind the production of coreless materials are much lower.

[0006] Finally, in terms of accuracy, the traditional structure also has deficiencies. Due to the existence of the tooth-slot structure, the overall accuracy of the motor is relatively low, especially in application scenarios that require precise control. Similarly, due to the tooth-slot structure, the braking accuracy of the motor is also relatively low, which may cause problems in some applications that require precise positioning.

[0007] At present, the winding equipment for coreless cup motors is also part of the technical barriers. The global leading manufacturers of winding machines are concentrated in Europe, America and Japan, including companies such as Swiss Meteor, Tanaka Precision Machinery of Japan, and Nitto Machinery of Japan. The equipment of overseas manufacturers is advanced, and the automation, intelligence and networking of winding equipment have been basically realized. The winding equipment is of reliable quality and high production efficiency. The automation degree of domestic winding equipment is low, and there is a gap in technology compared with overseas. This includes companies such as Zhongte Technology, Qinlian Technology, and Taili Electronics. The research and development of coreless cup motor winding machines in China started late, and the coil design is mainly in the form of winding, with relatively cumbersome processes. Some winding machines can achieve one-time forming winding, but for the thick wire diameter coils of larger power motors, there is still a large gap between domestic equipment and the world's advanced level in terms of reliability and winding accuracy. The brushless motor applied in the present invention avoids foreign technical barriers during production and can achieve complete independent and unrestricted product production. Summary of the Invention

[0008] The purpose of the present application is to provide a coreless mesh (grille) brushless motor stator, which has the advantages of smooth start, high speed, stable operation, low noise, high efficiency, large power density, high precision, a larger middle hole that can accommodate thicker and more wires, small volume, light weight, and saving more materials.

[0009] The present application provides a coreless mesh (grille) brushless motor stator, including a cylindrical stator winding ring. The stator winding ring is formed by splicing a plurality of conductive coils arranged at intervals in the circumferential direction. The magnetic flux direction generated by the conductive coils is arranged along the radial direction of the stator winding ring. The conductive coil includes a first conductive strip and a second conductive strip. The first conductive strip and the second conductive strip are stacked on top of each other along the radial direction of the stator winding ring. Both the first conductive strip and the second conductive strip are in a non-straight bar structure. The two ends of the first conductive strip are respectively arranged in a matching manner with the two ends of the second conductive strip. The first conductive strip and the second conductive strip are connected to form a semi-circular structure.

[0010] Compared with the prior art, the stator of the ironless mesh (grille) brushless motor of the present application has the following advantages: First, the conductive loop structure can significantly increase the current density and make up for the potential decrease in magnetic field strength after removing the iron core; Second, the cylindrical stator winding ring design can achieve a more uniform magnetic field distribution, which helps to reduce electromagnetic noise and improve operating stability; In addition, the present application also takes into account the convenience of manufacturing and assembly, that is, by designing the first conductive bar and the second conductive bar into a semi-ring structure and matching them at both ends to form a semi-ring shape, the production process can be simplified while ensuring the structural stability; Further, the first conductive bar and the second conductive bar are stacked radially along the stator winding ring, and this arrangement can make the adjacent conductive loops arranged more closely, increasing the density of the formed magnetic field, thereby achieving more efficient electromagnetic conversion; Finally, due to the absence of an iron core, the weight of the stator is greatly reduced, the power density of the motor is increased, the cogging effect is eliminated, and the electromagnetic noise and torque ripple are significantly reduced. Therefore, this structural design not only eliminates the limitations of the traditional iron core structure, but also achieves efficient electromagnetic conversion through an optimized conductive loop arrangement.

[0011] In a possible implementation manner, the first conductive bar includes a first upper end head, a first upper conductive section, a first middle conductive section, a first lower conductive section, and a first lower end head that are integrally connected in sequence from top to bottom. The first upper conductive section, the first middle conductive section, and the first lower conductive section form an outwardly protruding structure. The second conductive bar includes a second upper end head, a second upper conductive section, a second middle conductive section, a second lower conductive section, and a second lower end head that are integrally connected in sequence from top to bottom. The second upper conductive section, the second middle conductive section, and the second lower conductive section form an outwardly protruding structure. The first lower end head is connected to the second lower end head, and the first middle conductive section and the second middle conductive section are spaced apart. Compared with the prior art, the conductive loop is simple to manufacture and has a stable structure to ensure reliable electrical connection and mechanical strength.

[0012] In a possible implementation manner, the first upper end head and the first lower end head are both provided with first positioning holes, the second upper end head and the second lower end head are both provided with second positioning holes, and the first positioning hole of the first lower end head and the second positioning hole of the second lower end head are matched and positioned with each other. Compared with the prior art, the mutual matching and positioning of the positioning holes can ensure that the first conductive bar and the second conductive bar can be accurately aligned during assembly, thereby forming an accurate semi-ring structure and improving the connection accuracy and stability between the conductive bars.

[0013] In a possible implementation, the lengths of the first middle conductive section and the second middle conductive section are set to be greater than 2 mm. Compared with the prior art, by setting the length range of the middle conductive section, the overall size and shape of the conductive loop can be effectively controlled; a range above 2 mm can not only ensure sufficient magnetic field strength, which helps to optimize the overall structure and performance of the motor. A longer middle conductive section can increase the effective magnetic field area and improve the output power of the motor; while a shorter middle conductive section may be beneficial to reducing the volume and weight of the stator.

[0014] In a possible implementation, both the first upper end and the second upper end are connected to an external power supply through a conductor, and the first lower end and the second lower end are welded and electrically connected to each other. Compared with the prior art, it not only improves the stability and reliability of the connection, but also simplifies the assembly process, which is beneficial to improving production efficiency and product quality.

[0015] In a possible implementation, the outer surface of the conductive loop is coated with an insulating layer. Compared with the prior art, by coating the outer surface of the conductive loop with an insulating layer, electrical isolation between the conductive loops and between the conductive loop and other components can be ensured, preventing current leakage or short circuit caused by accidental contact.

[0016] In a possible implementation, the stator winding ring has a grid-like structure. Compared with the prior art, this structure not only increases the overall strength of the stator winding ring, improves the utilization rate of the magnetic field, but also can improve the uniformity of the magnetic field.

[0017] In a possible implementation, it further includes an insulating ring for coating the stator winding ring, and the insulating ring is made of epoxy resin or non-metallic heat-conducting material. Compared with the prior art, by adding the insulating ring, electrical contact between the stator winding ring and the external environment can be effectively prevented, and at the same time, the structural strength of the stator can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the stator winding ring of Embodiment 1; Figure 2 It is a schematic flattened diagram of the stator winding ring of Embodiment 1 after being unfolded; Figure 3 It is for Figure 2 partial schematic diagram of Figure 4 It is a schematic structural diagram of the conductive loop of Embodiment 1; Figure 5 It is a schematic structural diagram of the stator winding ring of Embodiment 2; Figure 6 It is a schematic flattened diagram of the stator winding ring of Embodiment 2 after being unfolded; Figure 7 It is forFigure 6 Partial schematic diagram; Figure 8 Schematic diagram of the conductive loop of Embodiment 2; Figure 9 Schematic diagram of the conductive loop of Embodiment 3; Figure 10 Schematic diagram of the conductive loop of Embodiment 4; Explanation of reference numerals: 1. Stator winding ring; 2. Conductive loop; 21. First conductive bar; 211. First upper end; 212. First upper conductive section; 213. First middle conductive section; 214. First lower conductive section; 215. First lower end; 216. First positioning hole; 22. Second conductive bar; 221. Second upper end; 222. Second upper conductive section; 223. Second middle conductive section; 224. Second lower conductive section; 225. Second lower end. Detailed implementation manners

[0019] First of all, those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0020] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0021] In the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0022] In traditional brushless motor designs, the motor stator typically consists of an iron core and enameled wire. Although this structure is widely used, it has some inherent technical limitations. Specifically, the combination of the iron core and enameled wire results in slow motor startup, unstable speed regulation, and significant electromagnetic noise. Additionally, due to the presence of magnetic field harmonics and cogging torque pulsations, the operating efficiency of the motor is affected. The leakage magnetic flux phenomenon and large iron losses in the stator further reduce the overall efficiency of the motor. Due to the limitations of the iron core slots, it is not possible to use overly thick or numerous enameled wires, which also restricts the improvement of motor performance to a certain extent.

[0023] If these technical problems are not solved, it will have a serious impact on the performance and reliability of the entire automation system. First, insufficient precision will directly lead to a decline in product quality, increasing the scrap rate and rework costs. Second, low energy efficiency will increase operating costs and may lead to a shortened system lifespan. In some noise-sensitive application environments, such as medical equipment or precision instrument manufacturing, the electromagnetic noise of the motor may interfere with the normal operation of other devices. In the long run, these problems may limit the application of automation technology in some high-demand fields and hinder the technological progress of related industries. Therefore, it is particularly important to develop a new motor structure that can overcome these limitations.

[0024] The following further elaborates on this application in detail with reference to the accompanying drawings and specific embodiments.

[0025] Embodiment 1 Refer to Figures 1 to 4 , this application embodiment discloses a coreless mesh (grille) brushless motor stator, including a cylindrical stator winding ring 1. The stator winding ring 1 is formed by splicing a plurality of conductive coils 2 arranged at intervals in the circumferential direction. The magnetic flux direction generated by the conductive coil 2 is arranged along the radial direction of the stator winding ring 1. The conductive coil 2 includes a first conductive strip 21 and a second conductive strip 22. The first conductive strip 21 and the second conductive strip 22 are stacked on top of each other along the radial direction of the stator winding ring 1. Both the first conductive strip 21 and the second conductive strip 22 are non-straight strip structures. The two ends of the first conductive strip 21 are respectively arranged in a matching manner with the two ends of the second conductive strip 22. The first conductive strip 21 and the second conductive strip 22 are connected to form a semi-circular structure.

[0026] As can be seen from the above, first, the structure of the conductive loop 2 can significantly increase the current density and compensate for the potential decrease in magnetic field strength after removing the iron core. Second, the design of the cylindrical stator winding ring 1 can achieve a more uniform magnetic field distribution, which helps to reduce electromagnetic noise and improve operating stability. In addition, this application also takes into account the convenience of manufacturing and assembly. That is, by designing the first conductive bar 21 and the second conductive bar 22 into a semi-circular structure and matching them at both ends to form a semi-ring shape, the production process can be simplified while ensuring the structural stability. Further, the first conductive bar 21 and the second conductive bar 22 are stacked radially along the stator winding ring 1. This arrangement can make the adjacent conductive loops 2 arranged more closely, enhancing the density of the formed magnetic field, thereby achieving more efficient electromagnetic conversion. Finally, due to the absence of an iron core, the weight of the stator is greatly reduced, the volume of the motor is decreased, the power density of the motor is increased, the cogging effect is eliminated, and the electromagnetic noise and torque ripple are significantly reduced. Therefore, this structural design not only eliminates the limitations of the traditional iron core structure but also achieves efficient electromagnetic conversion through the optimized arrangement of the conductive loops 2.

[0027] During operation, current passes through the conductive loop 2 to generate a magnetic field. Due to the special structure and arrangement of the conductive loop 2, the direction of the generated magnetic flux is set radially along the stator winding ring 1. This design makes the magnetic field distribution more uniform, effectively reducing electromagnetic noise and improving the operating stability of the motor.

[0028] Specifically, the material of the stator winding ring 1 is copper sheet (copper bar). Copper is selected as the conductive material because of its good electrical conductivity and heat dissipation. The design of the cylindrical stator winding ring 1 is conducive to achieving a more compact structure while ensuring a uniform magnetic field distribution. Designing the first conductive bar 21 and the second conductive bar 22 into a semi-circular structure and connecting them not only simplifies the manufacturing process but also ensures the structural stability and electrical conductivity.

[0029] In use, the stator winding ring 1 can be fixed inside the motor housing and used in cooperation with the rotor. When powered on, current passes through the conductive loop 2 to generate a radial magnetic field, which interacts with the permanent magnet on the rotor, thereby generating torque to drive the rotor to rotate. Due to the removal of the traditional iron core structure, this design can significantly reduce iron loss, improve the motor efficiency, and achieve a faster starting speed and a smoother speed regulation at the same time.

[0030] In this embodiment, the first conductive bar 21 includes a first upper end head 211, a first upper conductive section 212, a first middle conductive section 213, a first lower conductive section 214, and a first lower end head 215 that are integrally connected in sequence from top to bottom. The first upper conductive section 212, the first middle conductive section 213, and the first lower conductive section 214 form an outwardly protruding structure. The second conductive bar 22 includes a second upper end head 221, a second upper conductive section 222, a second middle conductive section 223, a second lower conductive section 224, and a second lower end head 225 that are integrally connected in sequence from top to bottom. The second upper conductive section 222, the second middle conductive section 223, and the second lower conductive section 224 form an outwardly protruding structure. The first upper end head 211 matches the second upper end head 221, the first lower end head 215 is connected to the second lower end head 225, and the first middle conductive section 213 and the second middle conductive section 223 are spaced apart. First, both the first conductive bar 21 and the second conductive bar 22 are in a semi-circular structure, and a semi-circular structure is formed through the connection of the lower end heads. Secondly, the upper conductive sections, middle conductive sections, and lower conductive sections of the first conductive bar 21 and the second conductive bar 22 form an outwardly protruding structure. This protruding structure increases the surface area of the conductive bar, which is beneficial to heat dissipation and the formation of a magnetic field. The outwardly protruding structure can also increase the rigidity of the conductive bar and improve the overall strength of the stator winding ring 1. Finally, the conductive loop 2 designed with this structure is simple to manufacture and has a stable structure. In practical applications, a pure copper material with high conductivity can be used to make the conductive bar to ensure good electrical conductivity.

[0031] In this embodiment, first upper end heads 211 and first lower end heads 215 are both provided with first positioning holes 216, and second upper end heads 221 and second lower end heads 225 are both provided with second positioning holes. The first positioning holes 216 and the second positioning holes are matched and positioned with each other. Specifically, the first positioning holes 216 are provided on the first upper end heads 211 and the first lower end heads 215, and the second positioning holes are provided on the second upper end heads 221 and the second lower end heads 225; the positions of these positioning holes are precisely calculated and designed to ensure perfect matching during assembly; when the first conductive bar 21 and the second conductive bar 22 are connected, the relative positions of the two conductive bars can be guided and fixed through these positioning holes. For example, a positioning pin or other appropriate connecting piece can be used to pass through these positioning holes to precisely fix the first conductive bar 21 and the second conductive bar 22 together; this method not only improves the assembly accuracy but also increases the connection stability. This positioning method can also simplify the assembly process; since the positioning holes provide clear reference points, assemblers or automated equipment can more easily align and connect the conductive bars; this not only improves production efficiency but also reduces assembly defects caused by human errors. As a preferred embodiment, the first positioning holes 216 and the second positioning holes can be designed to be circular, and the diameter can be selected according to actual needs; the edges of the positioning holes can be chamfered to facilitate the insertion of the positioning pins. Therefore, the design of the positioning holes enables precise positioning of each part of the stator, thereby reducing performance fluctuations caused by component position deviations.

[0032] In this embodiment, longer first middle conductive segments 213 and second middle conductive segments 223 are selected. The longer middle conductive segments can increase the effective magnetic field area, improve the output power of the motor, and at the same time increase the heat dissipation area, which helps to reduce the temperature of the stator during operation, and improve the reliability and service life of the motor.

[0033] In this embodiment, the first upper end heads 211 and the second upper end heads 221 are both connected to an external power source through a conductor, and the first lower end heads 215 and the second lower end heads 225 are welded and electrically connected to each other. Specifically, connecting the first upper end heads 211 and the second upper end heads 221 to an external power source through a conductor can ensure stable current input; at the same time, welding the first lower end heads 215 and the second lower end heads 225 and keeping them electrically connected can form a complete circuit loop, effectively reducing the contact resistance and improving the current conduction efficiency. Welding can form a metallurgical bond between metals, which is not easily affected by external factors such as vibration and temperature changes, thus ensuring long-term stable electrical connection, which is crucial for the long-term stable operation of the motor. Since the upper end heads are connected to an external power source through a conductor and the lower end heads are connected to each other by welding, the entire connection process can be simpler and more direct, reducing complex wiring steps, which is beneficial to improving production efficiency and reducing the risk of assembly errors.

[0034] In this embodiment, the outer surface of the conductive loop 2 is coated with an insulating layer. First of all, the insulating layer can protect the surface of the conductive loop 2 from oxidation and corrosion, extending the service life of the conductive loop 2; secondly, the insulating layer can reduce the electromagnetic interference between the conductive loops 2, improving the operating stability of the motor; in addition, the insulating layer can also reduce the surface temperature of the conductive loop 2 to a certain extent, contributing to improving the heat dissipation performance of the stator. Specifically, the design of the insulating layer can be achieved in various ways. For example, heat-resistant and wear-resistant insulating materials such as polyimide and polytetrafluoroethylene can be used; the thickness of the insulating layer can be adjusted according to actual needs, usually between 0.05 mm and 1 mm, to ensure sufficient insulation effect without significantly increasing the overall size of the conductive loop 2; the coating method of the insulating layer can also adopt processes such as impregnation, spraying or hot pressing.

[0035] In this embodiment, the stator winding ring 1 has a grid-like structure. The mesh structure endows the stator winding ring 1 with higher mechanical strength and anti-deformation ability; the grid structure increases the surface area, which is conducive to heat dissipation and improves the heat dissipation efficiency of the stator; the staggered arrangement of the conductive loops 2 helps to form a more uniform magnetic field distribution and reduce magnetic field distortion; the grid structure can reduce the material usage while maintaining the strength, optimizing the space utilization rate.

[0036] In this embodiment, the motor stator further includes an insulating ring for coating the stator winding ring 1, and the material of the insulating ring is epoxy resin or non-metallic heat-conducting material. Specifically, the insulating ring can be made of epoxy resin or non-metallic heat-conducting material; epoxy resin has excellent insulation performance and mechanical strength, which can effectively protect the stator winding ring 1 from the external environment; the non-metallic heat-conducting material can improve the heat dissipation effect of the stator while ensuring the insulation performance, contributing to reducing the temperature during the operation of the stator. During the manufacturing process, the stator winding ring 1 can be first placed in a mold, and then liquid epoxy resin or other selected non-metallic heat-conducting materials are injected; after the materials are cured, an insulating ring that tightly coats the stator winding ring 1 can be formed; this method can ensure that there is no gap between the insulating ring and the stator winding ring 1, thus maximizing the insulation and heat conduction effects.

[0037] This embodiment also provides a preparation process for the ironless mesh (grid) brushless motor stator as described above, including the following steps: The first step: Prepare high-purity electrolytic copper plates or aluminum plates; The second step: Use equipment and molds to process to form a plurality of required first conductive bars 21 and second conductive bars 22; The third step: Arrange a plurality of first conductive bars 21 horizontally to form a group; The fourth step: Insulate a group of first conductive bars 21; Step 5: Arrange multiple second conductive bars 22 horizontally to form a group; Step 6: Insulate a group of second conductive bars 22; Step 7: Stack a group of first conductive bars 21 on a group of second conductive bars 22 through positioning holes, and use a mold to splice them in the circumferential direction to form a cylindrical stator winding ring 1; Step 8: The lower ends of the conductive bars are welded and electrically connected to form a conductive ring 2, and the upper ends of the conductive bars are led out through conductors to form a star connection or a delta connection; Step 9: Use epoxy resin or other non-metallic materials with high thermal conductivity to pot the stator into a molded shape.

[0038] The ironless mesh (grille) brushless motor stator formed by the above preparation process can achieve the following technical effects: 1. Reduce iron loss: Due to the ironless structure, the iron loss caused by the iron core in the traditional stator is greatly reduced, thereby improving the overall efficiency of the motor, reducing the weight, shrinking the volume, and saving more materials.

[0039] 2. Reduce electromagnetic noise: The ironless structure reduces magnetic field harmonics, and at the same time, the special design of the conductive bars also helps to form a more uniform magnetic field distribution, thereby significantly reducing electromagnetic noise.

[0040] 3. Improve heat dissipation effect: The grille mesh structure of the stator increases the heat dissipation area, which is conducive to the rapid dissipation of heat, thereby improving the working efficiency and service life of the motor.

[0041] 4. Enhance mechanical strength: The special structural design of the conductive bars and the mesh structure enhance the overall rigidity and strength of the stator winding ring 1, improving the reliability of the motor.

[0042] 5. Optimize magnetic field distribution: The structural design of the conductive bars helps to form a more uniform magnetic field distribution, reducing magnetic field harmonics, thereby improving the running stability and efficiency of the motor.

[0043] 6. Achieve the advantages of small volume, light weight, high efficiency, high power density, high precision, large middle hole allowing thicker or more cables to pass through, improving the flexibility and safety of the motor layout, and making the overall product look more concise and fresh.

[0044] 7. Application fields: Suitable for high-end medical, robotics, automation, new energy vehicles, aerospace and other fields.

[0045] Embodiment 2 Such as Figures 5 to 8As shown in the figure, the difference between this embodiment and the first embodiment is that shorter first middle conductive segments 213 and second middle conductive segments 223 are selected. The shorter middle conductive segments can help reduce the volume and weight of the stator, which is beneficial to the miniaturization development of the motor.

[0046] Embodiment Three As Figure 9 shown in the figure, the difference between this embodiment and the first embodiment is that the first upper end heads 211 and the second upper end heads 221 of a conductive loop 2 are arranged at intervals, and the first upper end heads 211 of the conductive loop 2 are arranged in positioning and matching with the second upper end heads 221 of the adjacent conductive loop 2.

[0047] Embodiment Four As Figure 10 shown in the figure, the difference between this embodiment and the third embodiment is that shorter first middle conductive segments 213 and second middle conductive segments 223 are selected.

[0048] In the description of the embodiments of the present application, it should be noted that in the description of the present application, the terms indicating directions or positional relationships such as "inner" and "outer" are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, rather than indicating or implying that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0049] In the description of the present application, the descriptions referring to terms such as "one embodiment", "some embodiments", "in this embodiment", "specific examples", or "some examples" mean that the specific features, mechanisms, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0050] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A coreless mesh (grid) brushless motor stator, characterized in that: The invention comprises a cylindrical stator winding ring (1), the stator winding ring (1) comprising a plurality of conductive rings (2) arranged and spliced ​​at intervals in a circumferential direction, the magnetic flux direction generated by the conductive ring (2) being arranged in the radial direction of the stator winding ring (1), the conductive ring (2) comprising a first conductive strip (21) and a second conductive strip (22), the first conductive strip (21) and the second conductive strip (22) being stacked on each other in the radial direction of the stator winding ring (1), the first conductive strip (21) and the second conductive strip (22) both being non-straight strip structures, the two ends of the first conductive strip (21) being arranged to match the two ends of the second conductive strip (22), and the first conductive strip (21) and the second conductive strip (22) being connected to form a semi-annular structure.

2. The ironless mesh (grid) brushless motor stator according to claim 1, characterized in that: The first conductive strip (21) comprises a first upper end (211), a first upper conductive segment (212), a first middle conductive segment (213), a first lower conductive segment (214) and a first lower end (215) which are connected in sequence from top to bottom, wherein the first upper conductive segment (212), the first middle conductive segment (213) and the first lower conductive segment (214) form an outwardly protruding structure, and the second conductive strip (22) comprises a second upper end (211), a first upper conductive segment (212), a first middle conductive segment (213), a first lower conductive segment (214) and a first lower end (215) which are connected in sequence from top to bottom. (221), a second upper conductive segment (222), a second middle conductive segment (223), a second lower conductive segment (224) and a second lower terminal (225), wherein the second upper conductive segment (222), the second middle conductive segment (223) and the second lower conductive segment (224) form an outwardly protruding structure, the first lower terminal (215) is connected to the second lower terminal (225), and the first middle conductive segment (213) and the second middle conductive segment (223) are arranged at intervals.

3. The ironless mesh (grid) brushless motor stator according to claim 2, characterized in that: The first upper end (211) and the first lower end (215) are both provided with a first positioning hole (216), the second upper end (221) and the second lower end (225) are both provided with a second positioning hole, and the first positioning hole (216) of the first lower end (215) and the second positioning hole of the second lower end (225) are matched and positioned with each other.

4. The ironless mesh (grid) brushless motor stator according to claim 2, characterized in that: The lengths of the first middle conductive segment (213) and the second middle conductive segment (223) are greater than 2 mm.

5. The ironless mesh (grid) brushless motor stator according to claim 2, characterized in that: The first upper end (211) and the second upper end (221) are both connected to an external power source via a conductor, and the first lower end (215) and the second lower end (225) are welded and electrically connected to each other.

6. The coreless mesh (grid) brushless motor stator according to claim 1, characterized in that: The outer surface of the conductive ring (2) is covered with an insulating layer.

7. The ironless mesh (grid) brushless motor stator according to claim 1, characterized in that: The stator winding ring (1) has a grid-like structure.

8. The ironless mesh (grid) brushless motor stator according to claim 1, characterized in that: It also comprises an insulating ring for covering the stator winding ring (1), wherein the insulating ring is made of epoxy resin or non-metallic heat-conducting material.

9. The ironless mesh (grid) brushless motor stator according to claim 1, characterized in that: The material of the stator winding ring (1) is a copper plate (copper bar) or an aluminum plate (aluminum bar) or a highly conductive material.

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