Annular winding, linear motor mover structure, linear motor and manufacturing process

Abstract

The application provides a kind of annular winding, linear motor moving structure, linear motor and manufacturing process, winding clamp with polygonal structure is provided, a boss is arranged on each side of the winding clamp, the bosses on multiple sides are connected to form a coil bearing surface, the bottom of the coil bearing surface extends axially to both sides to form opposite limit blocks; meanwhile, the coil is annularly wound on the coil bearing surface of the winding clamp by using the winding clamp to form a preformed winding, and a uniform potting adhesive layer is coated on the outside of the preformed winding; winding, packaging and assembly are carried out by using the positioning effect of the limit blocks of the winding clamp, the slot fill factor and the regularity of the main surface of the winding unit are ensured, and the stability of winding quality is improved; the setting of the potting adhesive layer can further ensure the consistency of the annular winding, and can also play the role of heat dissipation and insulation during motor operation.

Description

Technical Field

[0001] This invention relates to a linear motor, specifically to a ring winding, a linear motor mover structure, a linear motor, and a manufacturing process. Background Technology

[0002] Permanent magnet linear synchronous motors (PMSMs) possess advantages such as high thrust density, fast dynamic response, and high positioning accuracy, and have broad application prospects. A PMSM consists of a stator and a mover, with an air gap between them. The mover can move linearly relative to the stator on a cross-section perpendicular to its direction of motion. In practical applications, the toroidal winding, due to its coil plane being perpendicular to the motor's direction of motion, offers advantages such as no end crossing, small space occupation, and good mechanical strength, thus gaining widespread attention and application in PMSMs. Based on the relative positions of the toroidal winding and the magnet, PMSMs can be classified into external winding type and internal winding type. In the external winding type, the toroidal winding is located on the mover, and the magnet is located on the stator; in the internal winding type, the magnet is located on the mover, and the toroidal winding is located on the stator.

[0003] In the actual production and processing of motors, uniform air gap between the stator and rotor is a necessary condition for ensuring good motor operation. The air gap between the stator and rotor is essentially generated by the interaction of the ring winding and the magnet. It can be seen that the uniformity of the air gap between the ring winding and the magnet is determined by the accuracy of the entire assembly, which in turn depends on the accuracy of the parts. Therefore, ensuring the accuracy of each part is the key condition for ensuring the uniformity of the motor air gap.

[0004] In the manufacturing process of toroidal windings, when winding toroidal windings, it is required that the windings be arranged closely together and have a suitable winding preload to ensure a reasonable slot fill factor, so that the motor and other equipment have good output performance. However, traditional toroidal windings are mostly wound by hand, without giving the enameled wire sufficient tension, so it is impossible to guarantee a reasonable slot fill factor and winding flatness.

[0005] Meanwhile, to prevent interphase leakage current and current crossing between phases, traditional linear motors insert interphase insulation paper between the winding ends to enhance the insulation performance between phases. After inserting the interphase insulation paper, sealant also needs to be poured into the linear motor to dissipate heat, making the process complex.

[0006] In order to solve the above problems, people have been seeking an ideal technological solution. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a ring winding, a linear motor mover structure, a linear motor, and a manufacturing process.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a toroidal winding, comprising: The winding clamp has a polygonal structure, with a boss on each side of the polygonal structure. The bosses on multiple sides are connected to form a coil bearing surface. The bottom of the coil bearing surface extends axially to both sides to form opposing limiting blocks. The coil is wound in a ring around the coil bearing surface of the winding clamp; A potting compound layer is uniformly wrapped around the coil, with the two side edges of the potting compound layer vertically aligned with the two sides of the coil bearing surface.

[0009] The present invention also provides a manufacturing process for a toroidal winding, including a winding step and a potting step. The winding step includes: installing a left clamp and a right clamp on both sides of the winding clamp, and fastening the left clamp, the winding clamp and the right clamp together by a locking assembly, so that the right side wall of the left clamp, the left side wall of the right clamp and the coil bearing surface of the winding clamp form a winding groove. The coil is wound on the coil bearing surface to fill the winding groove until the height of the coil in the winding groove reaches the first preset height. Then the winding is stopped, and the locking assembly is opened to remove the left clamp and the right clamp to obtain the pre-made winding. Each side of the polygonal structure is provided with a boss, and the bosses on multiple sides are connected to form a coil bearing surface. The bottom of the coil bearing surface extends axially to both sides to form opposing limiting blocks. The right side of the left clamp is provided with a groove that matches the left limiting block of the winding clamp, and the left side of the right clamp is provided with a groove that matches the right limiting block of the winding clamp. The potting step includes: installing a left mold and a right mold on the outside of the prefabricated winding, and fastening the left mold, the prefabricated winding and the right mold together by a locking assembly, so that the prefabricated winding is located in the sealed cavity formed by the left mold and the right mold; The potting compound is injected from the potting port of the sealed cavity. When the liquid level of the potting compound reaches the second preset height, the injection of the potting compound is stopped, and the locking assembly is opened to remove the left clamp and the right clamp, thereby obtaining an annular winding covered with a potting compound layer. The right mold has a first receiving cavity, and the first receiving cavity has a groove that matches the right limiting block of the winding clamp; the left mold has a second receiving cavity, and the second receiving cavity has a groove that matches the left limiting block of the winding clamp; the first receiving cavity and the second receiving cavity cooperate to form a sealed cavity for accommodating the pre-made winding; the right mold or the left mold has a filling port.

[0010] The present invention also provides a linear motor mover structure, including a mover core, wherein a plurality of the aforementioned annular windings are installed on the inner wall of the mover core along the direction of motion, wherein the winding direction of any two annular windings is consistent, and every three adjacent annular windings are respectively connected to a three-phase power supply A, B, and C to form a winding unit.

[0011] The present invention also provides a linear motor, including a stator structure and a mover structure, wherein the mover structure is the aforementioned mover structure; the stator structure includes a stator core and magnets distributed on the stator core along the direction of motion.

[0012] This invention has significant substantive features and remarkable progress compared to existing technologies. Specifically, the toroidal winding in this invention includes winding clamps and a potting compound layer. The winding clamps play a positioning role during winding assembly, thereby ensuring uniform air gap between the toroidal winding and the stator magnet, which in turn ensures uniform air gap between the motor stator and rotor, enabling the linear motor to operate smoothly. The potting compound layer serves both as a heat dissipation layer during motor operation and as an insulation layer, eliminating the need for additional insulation paper during motor assembly and the subsequent overall potting process. Furthermore, the winding clamps and potting compound layer ensure consistent specifications for the toroidal winding, improving the precision of the toroidal winding components.

[0013] In the winding step of the toroidal winding, the present invention utilizes the positioning function of the winding clamp to form a winding slot with the coil bearing surface of the left clamp, the right clamp and the winding clamp. The coil is wound on the coil bearing surface to fill the winding slot. This winding method can ensure the slot fill factor and the regularity of the main surface of the winding unit, thereby improving the winding quality.

[0014] In the potting step of the toroidal winding, the positioning function of the winding clamp is used to securely connect the left mold, the toroidal winding, and the right mold, so that the toroidal winding is located in the sealed cavity formed by the left and right molds. Potting glue is injected from the potting port of the sealed cavity to add a potting glue layer to the outer layer of the prefabricated winding. The setting of the potting glue layer can further ensure the consistency of the specifications of the toroidal winding, and the potting glue layer of the toroidal winding can not only dissipate heat during motor operation, but also play an insulating role.

[0015] In this embodiment, during the assembly process, there is no need to place insulating paper between the two annular windings. Instead, the annular windings of the same specifications are directly assembled, which improves the accuracy of the entire assembly and ensures that the air gap between the annular windings and the magnet is uniform. This, in turn, ensures that the air gap between the stator and rotor of the motor is uniform, allowing the linear motor to operate well. Furthermore, there is no need to pot the motor with potting compound after the assembly is completed, which simplifies the assembly steps.

[0016] When the mover core is a quadrilateral mover base, the quadrilateral mover base is divided into two parts: a U-shaped base and an upper cover plate that mates with the U-shaped base. During assembly, the annular winding is first assembled into the U-shaped winding positioning groove in the U-shaped base. After assembly, the upper cover plate and the U-shaped base are fixed together. The above configuration realizes the modular assembly of the linear motor mover part, reduces the number of assembly parts and assembly steps, improves the accuracy of the entire assembly, and further realizes the uniformity of the air gap between the mover and the stator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the winding clamp of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of the left clamp of the present invention.

[0019] Figure 3 This is a cross-sectional view of the left and right sides of the present invention after assembly with the winding clamps.

[0020] Figure 4 yes Figure 3 Enlarged diagram in the image.

[0021] Figure 5 This is a perspective view of the left clamp, right clamp, and winding clamp of the present invention after assembly.

[0022] Figure 6 This is a schematic diagram of the structure of the left mold of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the right mold of the present invention.

[0024] Figure 8 This is an assembly cross-sectional view of the right mold, left mold, and annular winding of the present invention.

[0025] Figure 9 This is a cross-sectional view of a toroidal winding.

[0026] Figure 10 It is a 3D diagram of a toroidal winding.

[0027] Figure 11 This is a three-dimensional structural schematic diagram of the polygonal moving base described in Embodiment 2.

[0028] Figure 12 This is a schematic diagram of the toroidal winding distribution in Example 2.

[0029] Figure 13 This is a schematic diagram of the three-dimensional structure of the U-shaped seat described in Embodiment 3.

[0030] Figure 14 This is a three-dimensional structural diagram of the U-shaped seat described in Embodiment 5.

[0031] Figure 15 This is a three-dimensional structural schematic diagram of the polygonal moving base described in Embodiment 7.

[0032] Figure 16 This is a schematic diagram of the three-dimensional structure of the U-shaped seat described in Embodiment 7.

[0033] Figure 17 This is a three-dimensional structural diagram of the silicon steel sheet structure in Example 7.

[0034] Figure 18 This is a schematic diagram of the assembly of the U-shaped base and the three-sided silicon steel sheet structure in Example 7.

[0035] Figure 19 This is a cross-sectional schematic diagram of the upper cover plate in Embodiment 7.

[0036] Figure 20 This is a schematic diagram of the assembly of the upper cover plate and the silicon steel sheet structure in Example 7.

[0037] Figure 21 This is the overall assembly drawing of the linear motor described in Example 8.

[0038] Figure 22 This is a schematic diagram of the stator structure described in Example 8.

[0039] In the diagram, 1. Winding clamp; 2. Boss; 3. Limiting block; 4. Left clamp; 5. Groove; 6. Threaded hole; 7. Right clamp; 8. Nut; 9. Bolt; 10. Prefabricated winding; 11. Left mold; 12. First receiving cavity; 13. Filling port; 14. Right mold; 15. Annular winding; 16. Filling adhesive layer; 17. Mover core; 18. U-shaped seat; 19. Top cover plate; 20. Slot; 21. Limiting groove; 22. U-shaped winding positioning groove; 23. Silicon steel sheet slot; 24. Silicon steel sheet structure; 25. Stator core; 26. Magnet. Detailed Implementation

[0040] The technical solution of the present invention will be further described in detail below through specific embodiments. Example 1

[0041] The present invention discloses a manufacturing process for a toroidal winding, comprising a winding step and a potting step.

[0042] The winding process includes: installing a left clamp 4 and a right clamp 7 on both sides of the winding clamp 1, and fastening them together with a locking assembly; the right side wall of the left clamp 4 and the left side wall of the right clamp 7 together with the coil bearing surface of the winding clamp 1 form a winding groove; winding the coil onto the coil bearing surface to fill the winding groove until the height of the coil in the winding groove reaches a first preset height, stopping the winding, opening the locking assembly, and removing the left clamp 4 and the right clamp 7 to obtain the pre-made winding 10.

[0043] Among them, such as Figure 1 As shown, the winding clamp 1 has a polygonal structure, and a boss 2 is provided on each side of the polygonal structure. The bosses 2 on multiple sides are connected to form a coil bearing surface. The bottom of the coil bearing surface extends axially to both sides to form opposing limiting blocks 3.

[0044] like Figure 2 As shown, the right side of the left clamp 4 has a groove 5 that matches the left limiting block 3 of the winding clamp 1.

[0045] It is understood that the left side of the right clamp 7 is provided with a groove 5 that matches the right limiting block 3 of the winding clamp 1, and the specific structure is the same as... Figure 2 similar.

[0046] Furthermore, in specific implementation, the locking assembly includes a bolt 9 and a nut 8; correspondingly, the winding clamp 1, the left clamp 4, and the right clamp 7 are all provided with threaded holes 6. The bolt is passed through the threaded holes 6 and cooperates with the nut 8 to assemble the winding clamp 1, the left clamp 4, and the right clamp 7 together.

[0047] Specifically, the structural diagram of the assembled winding clamp 1, the left clamp 4, and the right clamp 7 is as follows: Figure 3-5 As shown, the winding clamp 1, the left clamp 4 and the right clamp 7 are fastened together to form a winding groove. The setting of the winding groove makes the coil winding arrangement more regular and dense, improving the slot fill factor. Moreover, since the winding groove formed before each winding is of the same size, it can ensure that the specifications of the formed annular winding are consistent and meet the winding quality, thus improving the stability of the winding quality.

[0048] After obtaining the pre-made winding 10, a potting compound layer 16 needs to be added to the outside of the pre-made winding 10. Specifically, the potting step includes: installing a left mold 11 and a right mold 14 on the outside of the pre-made winding 10 formed in the winding step, and fastening them together with a locking assembly, wherein the left mold 11 and the right mold 14 form a sealed cavity; injecting potting compound into the sealed cavity from the potting port 13, preferably, the potting compound is epoxy resin glue; when the liquid level of the potting compound in the sealed cavity reaches a second preset height, stopping the injection of the potting compound, opening the locking assembly, and disassembling the left clamp 4 and the right clamp 7, thereby obtaining an annular winding 15 covered with the potting compound layer 16.

[0049] The right mold 14 has a first receiving cavity 12, and the first receiving cavity 12 has a groove 5 that matches the right limiting block 3 of the winding clamp 1; the left mold 11 has a second receiving cavity, and the second receiving cavity has a groove 5 that matches the left limiting block 3 of the winding clamp 1; the first receiving cavity 12 and the second receiving cavity cooperate to form a sealed cavity for accommodating the pre-made winding; the right mold 14 or the left mold 11 has a filling port 13.

[0050] In practical implementation, the sizes of the first receiving cavity 12 and the second receiving cavity can be set according to requirements, such as... Figure 6 and Figure 7 The diagram shows a specific embodiment of the left mold 11 and the right mold 14. In this embodiment, the first receiving cavity 12 of the right mold 14 is much larger than the second receiving cavity of the left mold 11. During assembly, the pre-made winding 10 is first installed in the first receiving cavity 12 of the right mold 14, then the groove 5 of the left mold 11 is engaged with the left limiting block 3 of the winding clamp 1, and finally the locking assembly is used to fasten the left mold 11, the winding clamp 1, and the right mold 14.

[0051] In practical implementation, the locking assembly includes a bolt 9 and a nut 8; both the left mold 11 and the right mold 14 are provided with corresponding threaded holes 6. The bolt 9 is passed through the threaded holes 6 and cooperates with the nut 8 to assemble the prefabricated winding 10, the left mold 11, and the right mold 14 together. Specifically, the structural diagram of the prefabricated winding 10, the left mold 11, and the right mold 14 after assembly is shown below. Figure 8 As shown.

[0052] The winding clamp 1, the left mold 11, and the right mold 14 are fastened together to form a potting groove. Epoxy resin glue is injected into the potting groove through the potting port 13, thereby forming an insulating structure—the potting glue layer 16—on the outside of the prefabricated winding 10. The potting glue layer 16 can eliminate the need to place additional insulating paper between adjacent annular windings 15 for auxiliary insulation during the later assembly of the linear motor. At the same time, the potting glue layer 16 also has a heat dissipation function, which can reduce the need to fill the linear motor with sealant for heat dissipation after inserting interphase insulating paper.

[0053] like Figure 9-10 As shown, the toroidal winding 15 formed using the aforementioned manufacturing process includes: The winding clamp 1 has a polygonal structure. Each side of the polygonal structure is provided with a boss 2. The bosses 2 on multiple sides are connected to form a coil bearing surface. The bottom of the coil bearing surface extends axially to both sides to form opposing limiting blocks 3. The coil is wound in a ring around the coil bearing surface of the winding clamp 1; A potting compound layer 16 is uniformly wrapped around the coil, and the two side edges of the potting compound layer 16 are vertically aligned with the two sides of the coil bearing surface.

[0054] It is understandable that, depending on the performance requirements of the motor, the winding clamp 1 can be made of magnetic or non-magnetic material. When the winding clamp 1 is made of magnetic material, the motor thrust fluctuation is small. Example 2

[0055] This embodiment provides a linear motor mover structure, such as Figure 11 As shown; the linear motor mover structure includes a mover core 17, and the mover core 17 includes a polygonal mover base. Preferably, the polygonal mover base is assembled from multiple base plates. Figure 11 The image shown is of a quadrilateral moving base.

[0056] The inner wall of the polygonal moving base is equipped with the annular winding 15 described in Embodiment 1 along the direction of movement. The winding direction of any two annular windings 15 is consistent, and every three adjacent annular windings 15 are respectively connected to three-phase power supplies A, B, and C to form a winding unit. Figure 12 As shown.

[0057] It should be noted that, in actual implementation, any two adjacent annular windings 15 can be spaced apart or placed close together.

[0058] In this embodiment, the secondary winding of the mover structure adopts a ring winding 15, which effectively reduces the length of the end winding, reduces the end copper loss, and improves the motor efficiency.

[0059] In addition, the annular winding 15 in this embodiment has a winding clamp 1 and a potting compound layer 16. The winding clamp 1 and the potting compound layer 16 can ensure that the annular winding 15 has the same specifications, improve the component precision of the annular winding 15 and improve the precision of the entire linear motor assembly, ensure that the air gap between the annular winding 1 and the magnet 24 of the linear motor stator structure is uniform, and thus ensure that the air gap between the stator and rotor of the linear motor is uniform, so that the linear motor can operate well. Example 3

[0060] The difference between this embodiment and Embodiment 2 is that when the mover core is a quadrilateral mover seat, the quadrilateral mover seat can also be assembled from a U-shaped seat 18 with a concave groove and an upper cover plate 19; the structure of the U-shaped seat 18 is as follows: Figure 13 As shown.

[0061] During assembly, several annular windings 15 are first installed on the inner wall of the U-shaped seat 18 along the direction of movement, and then the upper cover plate 19 is installed on the U-shaped seat 18.

[0062] As can be seen, in this embodiment, the annular winding 15 is installed inside the mover seat in a slotless manner; and the U-shaped seat 18 enables modular assembly of the linear motor mover part, reduces assembly parts and assembly steps, improves the accuracy of the entire assembly, and further realizes uniform air gap between the linear motor mover structure and the stator structure. Example 4

[0063] The difference between this embodiment and embodiment 2 is that: the inner wall of the seat plate is provided with a plurality of slots 20 along the direction of movement, and the slots 20 cooperate with the slots 20 on other seat plates to form a winding positioning slot for limiting the annular winding 15.

[0064] As can be seen, in this embodiment, the annular winding 15 is installed inside the moving part in a slotted manner. The winding positioning slots ensure that the installed annular windings 15 are spaced evenly and prevent the annular windings 15 from moving during motor operation.

[0065] It is understood that each slot 20 has a limiting groove 21 on the top of its side wall corresponding to the limiting block 3 of the annular winding 15. During installation, the limiting groove 21 cooperates with the limiting block 3 of the annular winding 15 to lock the annular winding 15 and limit its movement. Example 5

[0066] The difference between this embodiment and embodiment 3 is that: Figure 14As shown, the inner wall of the U-shaped seat 18 is provided with a plurality of U-shaped winding positioning slots 22 along the direction of movement, and each U-shaped winding positioning slot 22 is equipped with one of the annular windings 15. The inner wall of the upper cover plate 19 is provided with a plurality of slots 20 corresponding to the U-shaped winding positioning slot 22. Each slot 20 cooperates with the corresponding U-shaped winding positioning slot 22 to fix one of the annular windings 15. During assembly, several annular windings 15 are first installed sequentially in the U-shaped winding positioning grooves 22 on the inner wall of the U-shaped seat 18. Then, several slots 20 on the upper cover plate 19 are aligned with the top of the annular windings 15 respectively. Finally, the upper cover plate 19 is fastened to the U-shaped seat 18. Example 6

[0067] The difference between this embodiment and embodiment 2 is that: a silicon steel sheet groove 23 is provided on the inner wall of the seat plate along the direction of movement, a silicon steel sheet structure 24 is installed in the silicon steel sheet groove 23, and several slots 20 are provided on one side of the silicon steel sheet structure 24; the slots 20 cooperate with the slots 20 on other seat plates to limit the position of the annular winding 15.

[0068] In a specific implementation, the silicon steel sheet structure 24 can be made by stacking multiple straight silicon steel sheets, and after it is made, several slots 20 are opened on one side of the silicon steel sheet structure 24. Of course, the silicon steel sheet structure 24 can also be directly formed by stacking multiple silicon steel sheets with several slots 20 punched on one side.

[0069] To resist the magnetic attraction of the stator section to the stator, the silicon steel sheet groove 23 is interference-fitted with the silicon steel sheet structure 24. Example 7

[0070] The difference between this embodiment and Embodiment 3 is as follows: like Figure 15-18 As shown, the three inner sidewalls of the U-shaped seat 18 are provided with a silicon steel sheet groove 23 along the direction of movement. A silicon steel sheet structure 24 is installed in the silicon steel sheet groove 23. Several slots 20 are provided on one side of the silicon steel sheet structure 24. The slots 20 on the U-shaped seat cooperate to form a U-shaped winding positioning groove 22 for limiting the position of the annular winding 15. One annular winding 15 is installed in each U-shaped winding positioning groove 22. like Figures 19-20 As shown, the inner wall of the upper cover plate 19 is provided with a silicon steel sheet groove 23 along the direction of movement. A silicon steel sheet structure 24 is installed in the silicon steel sheet groove 23. The slot 20 on the silicon steel sheet structure 24 cooperates with the corresponding U-shaped winding positioning slot 22 to fix one of the annular windings 15.

[0071] Specifically, the assembly method of the linear motor actuator structure includes the following steps: Obtain an annular winding 15, wherein the annular winding 15 is manufactured using the manufacturing process of the annular winding 15 described in Embodiment 1; To fabricate the silicon steel sheet structure 24, multiple straight silicon steel sheets are stacked to form the silicon steel sheet structure 24, and after fabrication, several slots 20 are opened on one side of the silicon steel sheet structure 24. A top cover plate 19 and a U-shaped seat 18 are fabricated. A silicon steel sheet groove 23 is formed on the inner wall of the top cover plate 19 along the direction of movement. A silicon steel sheet groove 23 is formed on each of the three inner side walls of the U-shaped seat along the direction of movement. The silicon steel sheet structure 24 is respectively installed into the silicon steel sheet groove 23 on the upper cover plate 19 and the U-shaped seat 18; Several annular windings 15 are sequentially installed in a U-shaped winding positioning groove 22 composed of multiple slots 20 on the inner wall of the U-shaped seat 18, wherein any two adjacent annular windings 15 have the same winding direction. Set up a three-phase power supply of A, B, and C. Connect each of three adjacent ring windings 15 to the three-phase power supply of A, B, and C respectively to form a winding unit. Finally, align the several slots 20 on the upper cover plate 19 with the top of the annular winding 15, and then fasten the upper cover plate 19 to the U-shaped seat 18 with bolts 9.

[0072] It is understood that, in order to facilitate the fixing of the upper cover plate 19 and the U-shaped seat 18, grooves are respectively opened on both sides of the inner wall of the upper cover plate 19, and bolt holes are opened in the grooves; correspondingly, the ends of the two vertical sides of the U-shaped seat 18 are also provided with corresponding bolt holes on the upper cover plate 19. In use, the upper cover plate 19 and the U-shaped seat 18 are fastened by bolts 9.

[0073] It can be seen that although the winding clamp 1 has a simple structure, it plays an extremely important role in the three processes of winding, potting and assembly. It is both a carrier and a medium. The limiting block 3 on the end face of the winding clamp 1 plays a positioning role in each link, ensuring the manufacturing accuracy of each process.

[0074] Furthermore, the annular winding 15 is placed directly in the U-shaped winding positioning groove 22 without the need for insulating paper to separate it, breaking the traditional assembly method and simplifying the assembly steps while ensuring insulation performance; at the same time, the potting adhesive layer 16 of the annular winding 15 can play a heat dissipation role, without the need to pot epoxy resin glue into the motor to increase heat dissipation components, thus simplifying the assembly steps. Example 8

[0075] This embodiment provides a linear motor, including a stator structure and a mover structure. The mover structure is the mover structure described in any one of embodiments 1-7. The stator structure includes a stator core 25 and magnets 26 distributed along the direction of motion on the stator core 25, such as... Figure 21-22 As shown.

[0076] In specific implementation, when the mover core 17 is a quadrilateral mover base, the stator core 25 is also a quadrilateral structure composed of an upper base plate, a lower base plate, a left base plate, and a right base plate. The magnets 24 on the upper base plate, the lower base plate, the left base plate, and the right base plate are all magnetized along the normal direction, and the magnetization directions of adjacent magnets 24 are opposite. Furthermore, the magnetization directions of the magnets 24 on the lower base plate are opposite to those of the magnets 24 on the upper base plate, and the magnetization directions of the magnets 24 on the left base plate are opposite to those of the magnets 24 on the right base plate.

[0077] It can be understood that the magnets 26 are fixed at equal intervals on the surface of the stator core 25, forming an air gap with the annular winding 15 in the mover core 17 with a rectangular cross-section, thereby directly driving the load to make linear motion, and has the advantages of high thrust density, high power density, low thrust fluctuation, and easy processing and assembly.

[0078] Furthermore, the stator core 25 is supported by silicon steel sheet magnetic material; the magnet 24 is made of permanent magnet materials such as rubidium iron boron, samarium cobalt, and ferrite.

[0079] The annular winding 15 of this invention has a winding clamp 1 and a potting compound layer 16. The winding clamp 1 can play a positioning role during the winding assembly process, thereby ensuring that the air gap between the annular winding 15 and the magnet 26 is uniform, which in turn ensures that the air gap between the stator and rotor of the motor is uniform, allowing the linear motor to operate well. The potting compound layer 16 can be used for heat dissipation during motor operation and also plays an insulating role, thereby eliminating the need for the step of setting insulating paper for auxiliary insulation and the step of potting the entire motor after setting insulating paper during motor assembly. In addition, the winding clamp 1 and the potting compound layer 16 can ensure that the specifications of the formed annular winding 15 are consistent, improving the component precision of the annular winding 15.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A toroidal winding, characterized in that, include: The winding clamp has a polygonal structure, with a boss on each side of the polygonal structure. The bosses on multiple sides are connected to form a coil bearing surface. The bottom of the coil bearing surface extends axially to both sides to form opposing limiting blocks. The coil is wound in a ring around the coil bearing surface of the winding clamp; A potting compound layer is uniformly wrapped around the coil, and the two side edges of the potting compound layer are vertically aligned with the two sides of the coil bearing surface, respectively. The annular winding is manufactured through the following winding and potting steps: The winding step includes: installing a left clamp and a right clamp on both sides of the winding clamp, and fastening the left clamp, the winding clamp and the right clamp together by a locking assembly, so that the right side wall of the left clamp, the left side wall of the right clamp and the coil bearing surface of the winding clamp form a winding groove; winding the coil on the coil bearing surface to fill the winding groove until the height of the coil in the winding groove reaches a first preset height, stopping the winding, and opening the locking assembly to remove the left clamp and the right clamp to obtain a pre-made winding; The left clamp has a groove on its right side that matches the left limiting block of the winding clamp, and the right clamp has a groove on its left side that matches the right limiting block of the winding clamp. The potting step includes: installing a left mold and a right mold on the outside of the prefabricated winding, and fastening the left mold, the prefabricated winding and the right mold together by a locking assembly, so that the prefabricated winding is located in the sealed cavity formed by the left mold and the right mold; The potting compound is injected from the potting port of the sealed cavity. When the liquid level of the potting compound reaches the second preset height, the injection of the potting compound is stopped, and the locking assembly is opened to remove the left clamp and the right clamp, thereby obtaining an annular winding covered with a potting compound layer. The right mold has a first receiving cavity, and the first receiving cavity has a groove that matches the right limiting block of the winding clamp; the left mold has a second receiving cavity, and the second receiving cavity has a groove that matches the left limiting block of the winding clamp; the first receiving cavity and the second receiving cavity cooperate to form a sealed cavity for accommodating the pre-made winding; the right mold or the left mold has a filling port.

2. A linear motor mover structure, comprising a mover core, characterized in that: The moving core includes a polygonal moving base, and a plurality of annular windings as described in claim 1 are installed on the inner wall of the polygonal moving base along the direction of movement. The winding directions of any two annular windings are consistent, and every three adjacent annular windings are respectively connected to the three-phase power supply A, B, and C to form a winding unit.

3. The linear motor actuator structure according to claim 2, characterized in that: The polygonal moving base includes multiple base plates, and each base plate has several slots on its inner wall along the direction of movement. The slots cooperate with the slots on other base plates to limit the position of the annular winding.

4. The linear motor actuator structure according to claim 3, characterized in that: Each seat plate has a silicon steel sheet groove on its inner wall along the direction of movement. A straight silicon steel sheet structure is installed in the silicon steel sheet groove. Several slots are opened on one side of the straight silicon steel sheet structure along the direction of movement. The slots cooperate with the slots on other seat plates to limit the movement of the annular winding.

5. The linear motor actuator structure according to claim 2, characterized in that: When the mover core is a quadrilateral mover seat, the quadrilateral mover seat includes a U-shaped seat with a concave groove and an upper cover plate that mates with and connects to the U-shaped seat; During assembly, several annular windings are first installed on the inner wall of the U-shaped seat along the direction of movement, and then the upper cover plate is installed on the U-shaped seat.

6. The linear motor actuator structure according to claim 2, characterized in that: When the mover core is a quadrilateral mover seat, the quadrilateral mover seat includes a U-shaped seat with a concave groove and an upper cover plate that mates with and connects to the U-shaped seat; The inner wall of the U-shaped seat is provided with a number of U-shaped winding positioning slots along the direction of movement, and each U-shaped winding positioning slot is equipped with one of the annular windings. The inner wall of the upper cover plate has several slots corresponding to the U-shaped winding positioning slot. Each slot cooperates with the corresponding U-shaped winding positioning slot to fix one of the annular windings.

7. The linear motor actuator structure according to claim 2, characterized in that: When the mover core is a quadrilateral mover seat, the quadrilateral mover seat includes a U-shaped seat with a concave groove and an upper cover plate that mates with and connects to the U-shaped seat; The three inner walls of the U-shaped seat have a silicon steel sheet groove along the direction of movement. A silicon steel sheet structure is installed in the silicon steel sheet groove. Several slots are opened on one side of the silicon steel sheet structure along the direction of movement. The slots cooperate with the slots on other seats to form a U-shaped winding positioning groove. A ring winding is installed in each U-shaped winding positioning groove. The inner wall of the upper cover plate has a silicon steel sheet groove along the direction of movement. A silicon steel sheet structure is installed in the silicon steel sheet groove. The slot on the silicon steel sheet structure cooperates with the corresponding U-shaped winding positioning slot to fix one of the annular windings.

8. The linear motor actuator structure according to any one of claims 3-7, characterized in that: Each winding positioning slot has a limiting slot on the top of its sidewall corresponding to the limiting block of the annular winding.

9. A linear motor, characterized in that: It includes a stator structure and a mover structure, wherein the mover structure is the linear motor mover structure according to any one of claims 2-8, and the stator structure includes a stator core and magnets distributed on the stator core along the direction of motion.

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