Motor winding structure

Abstract

The utility model relates to the field of motors, and discloses a motor winding structure which comprises a stator core and a coil winding assembly, copper wires of the coil winding assembly are flat wires, the coil winding assembly is installed on the stator core, and the stator core comprises a middle fixing ring and positioning pieces evenly arranged in the circumferential direction of the outer side wall of the fixing ring. The coil winding assemblies are installed on the positioning piece, a wiring end is reserved on each coil winding assembly, the PCB is of an annular structure coaxial with the fixing ring, the PCB covers the coil winding assemblies, wiring holes connected with the wiring ends are formed in the PCB, the wiring ends are fixedly connected with the PCB through the wiring holes, and the PCB is fixedly connected with the coil winding assemblies through the wiring holes. And each coil winding assembly is fixedly connected with the PCB. The motor has the advantages of higher slot filling rate, higher power density and better heat dissipation performance.

Description

Technical Field

[0001] The utility model relates to the field of motors, and in particular to a motor winding structure. Background Art

[0002] A general stator core assembly will have a stator core, stator winding, end wiring, etc. Chinese patent application CN201810854318.4 discloses this stator winding method and stator core winding. The existing hub motor stator core winding assembly is a round wire winding installed on the stator core, and then the winding inlet and outlet ends are welded to the corresponding control panel. This structural design requires sufficient operating space for personnel, so the entire motor occupies a large space. In addition, the wiring is more complicated, easy to connect incorrectly, and inefficient. In addition, the entire motor slot fill rate is low. Utility Model Content

[0003] The utility model aims at the shortcomings of the prior art and provides a motor winding structure.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A motor winding structure comprises a stator core and a coil winding assembly, wherein the copper wire of the coil winding assembly is a flat wire, the coil winding assembly is mounted on the stator core, the stator core comprises a fixing ring in the middle and positioning pieces evenly arranged along the circumferential direction of the outer wall of the fixing ring, the coil winding assembly is mounted on the positioning pieces, each coil winding assembly is reserved with a wiring terminal, and further comprises a PCB board, the PCB board is an annular structure coaxial with the fixing ring, the PCB board covers the top of each coil winding assembly, the PCB board is provided with a wiring hole connected to the wiring terminal, the wiring terminal is fixedly connected to the PCB board through the wiring hole, and each coil winding assembly is fixedly connected to the PCB board.

[0006] Preferably, the coil winding assembly includes a winding core, an insulating shell and copper wire from the inside to the outside. The winding core and the insulating shell are fixedly connected. The inner side surface of the winding core is provided with a positioning groove for cooperating with the positioning plate. The winding core is connected to the stator core through the positioning groove and the positioning plate.

[0007] Preferably, the size of the flat wire is 0.5 mm*2.9 mm; the PCB board is composed of multiple PCB board components; and the wiring terminal is fixed to the PCB board by welding.

[0008] Preferably, the cross section of the winding core is fan-shaped, and the central angle of the winding core is 4° to 8°.

[0009] Preferably, both side surfaces of the winding core are plane.

[0010] Preferably, the fixing ring forms limiting grooves on both sides of the root of the positioning plate, and positioning parts matching the limiting grooves are provided on both sides of the inner end surface of the iron core; the limiting grooves are arranged along the axial direction of the fixing ring, and the length of the positioning parts matches the limiting grooves.

[0011] Preferably, a positioning hook is provided at the end of the positioning portion along its length direction, and a positioning groove is formed between the positioning hook and the side surface of the iron core. An installation cavity is provided inside the insulating shell, and grooves are provided on both sides of the inner end of the installation cavity. The grooves extend axially along the installation cavity, and the positioning hook cooperates with the grooves.

[0012] Preferably, a recessed groove is provided at the outer end of the insulating shell, and the recessed groove is located around the opening of the outer end of the mounting cavity. The mounting cavity is a channel penetrating inside and outside. The shape of the winding core is adapted to the shape of the recessed groove and the mounting cavity. The winding core is assembled in the mounting cavity and the outer end is limited by the recessed groove.

[0013] Preferably, the insulating shell and the winding core are an integral structure formed by injection molding.

[0014] Preferably, the insulating shell includes a shell body, an outer edge of the shell body has a rib 1 extending outward, an inner edge has a rib 2 extending outward, the upper ends of rib 1 and rib 2 are provided with a wire outlet groove, the outer edge of the PCB board is provided with a notch corresponding to the wire outlet groove, and the connecting hole is located around the notch; a fixing hole is also provided at the upper end of rib 2, the PCB board is supported on rib 1 and rib 2, and is fixedly connected to rib 2 through the fixing hole.

[0015] Due to the adoption of the above technical solution, the utility model has the following significant technical effects:

[0016] The utility model designs a motor winding structure, which is wound by flat wire, and cooperates with the designed winding core and insulating shell, so that the winding slot full rate can reach 74.4%. At the same time, it can reduce the winding resistance, reduce copper loss, have higher power density, better heat dissipation, and better NVH performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the device.

[0018] Figure 2 It is a structural diagram of the winding core.

[0019] Figure 3 yes Figure 2 A partial enlarged view of .

[0020] Figure 4 It is a schematic diagram of the structure of the coil winding assembly.

[0021] Figure 5It is a structural diagram of the stator core.

[0022] The technical names of the accompanying drawings are: 1-stator core, 2-coil winding assembly, 3-copper wire, 4-fixing ring, 5-positioning plate, 6-terminal, 7-PCB board, 8-wiring hole, 10-winding core, 11-insulating shell, 12-positioning groove, 13-limiting groove, 14-positioning part, 15-positioning hook, 16-groove, 17-sunk groove, 18-guard edge one, 19-guard edge two, 20-wire outlet groove, 21-notch, 22-fixing hole. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0024] Example 1

[0025] A motor winding structure includes a stator core 1 and a coil winding assembly 2. The copper wire 3 of the coil winding assembly 2 is a flat wire. The coil winding assembly 2 is mounted on the stator core 1. The stator core 1 includes a fixing ring 4 in the middle and positioning pieces 5 evenly arranged along the circumferential direction of the outer wall of the fixing ring 4. The coil winding assembly 2 is mounted on the positioning pieces 5. Each coil winding assembly 2 is reserved with a terminal. The PCB board 7 is also included. The PCB board 7 is an annular structure coaxial with the fixing ring 4. The PCB board 7 covers the top of each coil winding assembly 2. The PCB board 7 is provided with a wiring hole 8 connected to the terminal. The terminal is fixedly connected to the PCB board 7 through the wiring hole 8. Each coil winding assembly 2 is fixedly connected to the PCB board 7. When connecting, the end of the copper wire 3 of the winding coil assembly is directly inserted into the corresponding connection hole and then fixed by welding. The entire operation process is basically carried out on the outside of the PCB board 7, so there is no need to occupy too much internal space of the PCB board 7. The entire winding structure has a high degree of integration, is easy to install, has high efficiency, high yield rate, and saves material costs.

[0026] In this embodiment, the coil winding assembly 2 includes a winding core 10, an insulating shell 11 and a copper wire 3 from the inside to the outside. The winding core 10 and the insulating shell 11 are fixedly connected. The inner side surface of the winding core 10 is provided with a positioning groove 12 for cooperating with the positioning plate 5. The winding core 10 is connected to the stator core 1 through the positioning groove 12 and the positioning plate 5. In this embodiment, the insulating shell 11 and the winding core 10 are an integral structure of injection molding. The upper wall of the insulating shell 11 is provided with a mounting groove corresponding to the positioning groove 12, and the lower end of the insulating shell 11 does not have this structural design. The copper wire 3 is wound on the insulating shell 11, and the inner and outer ends of the insulating shell 11 are provided with ribs, and the inner and outer ends of the winding are limited by the ribs.

[0027] The size of the flat wire selected in this embodiment is 0.5mm*2.9mm; the PCB board 7 is composed of multiple PCB board 7 components, specifically in this embodiment, the PC board is composed of two boards, and the copper wire 3 terminal is welded and fixed to the PCB board 7. Specifically, the existing motor winding is inserted into the wiring hole 8 in the PCB board 7 at the corresponding position, and then welded and fixed.

[0028] The cross section of the winding core 10 described in this embodiment is fan-shaped, and the center angle of the winding core 10 is 4° to 8°. The winding core 10 and the fixing ring 4 are coaxially arranged. In this embodiment, the center angle is 6 degrees.

[0029] Both sides of the winding core 10 are flat, which is convenient for winding the flat wire in the later stage and ensures the fit.

[0030] The fixing ring 4 forms a limiting groove 13 on both sides of the root of the positioning piece 5, and positioning parts 14 matching the limiting groove 13 are arranged on both sides of the inner end surface of the core; the limiting groove 13 is arranged along the axial direction of the fixing ring 4, and the length of the positioning part 14 matches the limiting groove 13. In this embodiment, the limiting groove 13 is arranged along the axial direction.

[0031] In this embodiment, a positioning hook 15 is provided at the end of the positioning portion 14 along its length direction, and the positioning hook 15 forms a positioning groove 12 with the side surface of the iron core. An installation cavity 30 is provided inside the insulating shell 11, and grooves 16 are provided on both sides of the inner end of the installation cavity 30. The grooves 16 extend axially along the installation cavity 30, and the positioning hook 15 cooperates with the grooves 16.

[0032] The outer end of the insulating housing 11 is provided with a recessed groove 17, which is located around the outer end opening of the mounting cavity 30. The mounting cavity 30 is a channel that penetrates inside and outside. The shape of the winding core 10 is adapted to the shape of the recessed groove 17 and the mounting cavity 30. The winding core 10 is assembled in the mounting cavity 30 and the outer end is limited by the recessed groove 17.

[0033] In this embodiment, the insulating shell 11 and the winding core 10 are an integral structure formed by injection molding. The insulating shell 11 includes a shell body, the outer edge of the shell body has a flange 18 extending outward, and the inner edge has a flange 2 19 extending outward, the upper ends of the flange 18 and the flange 2 19 are provided with a wire outlet slot 20, the outer side of the PCB is provided with a notch 21 corresponding to the wire outlet slot 20, and the connection hole is located around the notch 21; the upper end of the flange 2 19 is also provided with a fixing hole 22, and the PCB board 7 is supported on the flange 1 18 and the flange 2 19, and is fixedly connected to the flange 2 19 through the fixing hole 22. The flange 1 18 and the flange 2 19 are both annular flanges arranged along the edge of the shell body, and the space between the flange 1 18 and the flange 2 19 is used to wind the copper wire 3.

[0034] The motor winding structure designed in this solution is wound by flat wire, and with the designed winding core 10 and insulating shell 11, the winding slot full rate can reach 74.4%. At the same time, it can reduce winding resistance, reduce copper loss, have higher power density, better heat dissipation, and better NVH performance.

[0035] Example 2

[0036] The difference from the first embodiment is that the insulating housing 11 and the winding core 10 are not injection molded, but assembled by snap-fitting.

[0037] Example 3

[0038] A motor is equipped with the above motor winding structure.

Claims

1. A motor winding structure, characterized in that: The invention comprises a stator core (1) and a coil winding assembly (2), wherein the copper wire (3) of the coil winding assembly (2) is a flat wire, the coil winding assembly (2) is mounted on the stator core (1), the stator core (1) comprises a fixing ring (4) in the middle and positioning plates (5) evenly arranged along the circumferential direction of the outer wall of the fixing ring (4), the coil winding assembly (2) is mounted on the positioning plates (5), each coil winding assembly (2) is provided with a connection terminal, and further comprises a PCB board (7), the PCB board (7) is an annular structure coaxial with the fixing ring (4), the PCB board (7) covers the top of each coil winding assembly (2), the PCB board (7) is provided with a connection hole (8) connected to the connection terminal, the connection terminal is fixedly connected to the PCB board (7) through the connection hole (8), and each coil winding assembly (2) is fixedly connected to the PCB board (7).

2. A motor winding structure according to claim 1, characterized in that: The coil winding assembly (2) comprises, from the inside to the outside, a winding core (10), an insulating shell (11) and a copper wire (3); the winding core (10) and the insulating shell (11) are fixedly connected; the inner side surface of the winding core (10) is provided with a positioning groove (12) for cooperating with a positioning piece (5); the winding core (10) is connected to the stator core (1) via the positioning groove (12) and the positioning piece (5).

3. The motor winding structure according to claim 1, characterized in that: The size of the flat wire is 0.5 mm*2.9 mm; the PCB board (7) is composed of a plurality of PCB board (7) components; and the wiring terminal is fixed to the PCB board (7) by welding.

4. The motor winding structure according to claim 1, characterized in that: The cross section of the winding core (10) is fan-shaped, and the center angle of the winding core (10) is 4° to 8°.

5. A motor winding structure according to claim 1, 2 or 3, characterized in that: Both sides of the winding core (10) are flat.

6. The motor winding structure according to claim 1, characterized in that: The fixing ring (4) forms limiting grooves (13) on both sides of the root of the positioning piece (5), and positioning parts (14) matching the limiting grooves (13) are arranged on both sides of the inner end surface of the iron core; the limiting grooves (13) are arranged along the axial direction of the fixing ring (4), and the length of the positioning parts (14) matches the limiting grooves (13).

7. A motor winding structure according to claim 6, characterized in that: A positioning hook (15) is provided at the end of the positioning portion (14) along its length direction, and the positioning hook (15) and the side surface of the iron core form a positioning groove (12). An installation cavity (30) is provided inside the insulating shell (11), and grooves (16) are provided on both sides of the inner end of the installation cavity (30). The grooves (16) extend axially along the installation cavity (30), and the positioning hook (15) cooperates with the grooves (16).

8. The motor winding structure according to claim 6, characterized in that: The outer end of the insulating shell (11) is provided with a recessed groove (17), the recessed groove (17) is located around the outer end opening of the mounting cavity (30), the mounting cavity (30) is a passage penetrating inside and outside, the shape of the winding core (10) is adapted to the shape formed by the recessed groove (17) and the mounting cavity (30), the winding core (10) is assembled in the mounting cavity (30) and the outer end is limited by the recessed groove (17).

9. The motor winding structure according to claim 2, characterized in that: The insulating shell (11) and the winding core (10) are an integral structure formed by injection molding.

10. The motor winding structure according to claim 2, characterized in that: The insulating shell (11) comprises a shell body, wherein the outer edge of the shell body has a first retaining edge (18) extending outwardly, and the inner edge of the shell body has a second retaining edge (19) extending outwardly, the upper ends of the first retaining edge (18) and the second retaining edge (19) are provided with a wire outlet groove (20), the outer side of the PCB board is provided with a notch (21) corresponding to the wire outlet groove (20), and the connection hole is located around the notch (21); the upper end of the second retaining edge (19) is also provided with a fixing hole (22), and the PCB board (7) is supported on the first retaining edge (18) and the second retaining edge (19), and is fixedly connected to the second retaining edge (19) through the fixing hole (22).

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