Block outer-wound inner stator for flat wire motor

Abstract

The application relates to a block outer-winding type inner stator for a flat wire motor, and belongs to the technical field of the flat wire motor. The stator core comprises a ring body and a plurality of winding blocks uniformly arranged on the circumferential side of the ring body. A plurality of dovetail grooves are uniformly arranged on the circumferential side of the ring body, the winding blocks are matched and arranged in the dovetail grooves, the winding blocks are wound with flat wire windings, and the flat wire windings can be movably arranged on the winding blocks. The stator core is assembled, the stator core is assembled by the ring body and the winding blocks, the winding blocks are arranged along the outer periphery of the ring body, the flat wire windings can be separately wound in the production process, and the flat wire windings can be mass-produced. When the whole is assembled, the flat wire windings only need to be sleeved on the winding blocks, then the winding blocks are sequentially inserted into the dovetail grooves of the ring body, finally, the flat wire windings are connected and welded together according to production requirements, the winding process is simple, and therefore the block outer-winding type inner stator can be applied to an outer rotor motor.

Description

Technical Field

[0001] This application relates to the technical field of flat wire motors, and in particular to a segmented externally wound inner stator for flat wire motors. Background Technology

[0002] Flat wire motors are a type of motor that uses flat copper wire windings instead of traditional round copper wire windings. Their structural design has significant advantages in many aspects, especially in high power density and high efficiency applications (such as drive motors for new energy vehicles).

[0003] Existing flat wire motors are generally used in internal rotor motors and are less commonly used in external rotor motors because of the difficulty in winding them. However, compared to motors with round wire windings, flat wire motors have a higher slot fill factor, which can improve motor efficiency and torque.

[0004] Therefore, in order to improve the efficiency and torque of hub motors, our company has made structural improvements to flat wire motors so that they can be used in external rotor motors. Utility Model Content

[0005] The purpose of this application is to provide a segmented externally wound inner stator for a flat wire motor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides a segmented externally wound inner stator for a flat wire motor, employing the following technical solution:

[0007] A segmented externally wound inner stator for a flat wire motor includes a stator core. The stator core includes an annular body and a plurality of winding blocks evenly arranged around the annular body. A plurality of dovetail grooves are evenly formed around the annular body. The winding blocks are fitted into the dovetail grooves. Flat wire windings are wound around the surface of the winding blocks and can be movably sleeved on the winding blocks. The cross-section of the winding blocks is T-shaped, and the side of the winding blocks away from the annular body is an arc-shaped surface.

[0008] Preferably, the annular body has symmetrical insulators on the upper and lower sides, which can wrap the upper and lower surfaces and sides of the annular body. The insulators also have grooves corresponding to the dovetail grooves, and the grooves have the same projected area as the dovetail grooves.

[0009] An insulating layer is provided on the surface of the winding block at the position corresponding to the flat wire winding.

[0010] By adopting the above technical solution, by setting an insulator and setting an insulating layer on the surface of the winding block, it is possible to ensure electrical insulation between the flat wire winding and the stator core, so as to prevent short circuit or electrical breakdown between the stator core and the flat wire winding. In addition, it can also reduce noise and vibration.

[0011] The insulator is provided with clearance grooves on its periphery corresponding to the positions of the dovetail grooves.

[0012] Rivet holes are correspondingly provided through the surfaces of the stator core and the insulator.

[0013] In summary, this application includes at least one of the following beneficial technical effects: the flat wire motor uses a segmented externally wound inner stator, which sets the stator core in an assembled manner. The stator core is assembled from an annular body and winding blocks. The winding blocks are arranged along the outer periphery of the annular body. During the manufacturing process, the flat wire windings can be wound individually and mass-produced. When assembling the whole, it is only necessary to put the flat wire windings on the winding blocks, and then insert the winding blocks into the dovetail slots of the annular body in sequence. Finally, according to the production requirements, the flat wire windings are connected in series or in parallel. The winding process is simple, so it can be applied to external rotor motors. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0015] Figure 2 This is an exploded structural diagram of an embodiment of this application.

[0016] Figure 3 This is an exploded schematic diagram used to illustrate the stator core in the embodiments of this application.

[0017] Figure 4 This is a schematic diagram illustrating the structure of the insulator in the embodiments of this application.

[0018] Explanation of reference numerals in the attached drawings: 1. Stator core; 11. Ring body; 111. Dovetail slot; 12. Winding block; 2. Flat wire winding; 3. Insulator; 31. Slot; 32. Relief slot; 4. Insulation layer; 5. Rivet hole. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0020] This application discloses a segmented externally wound inner stator for a flat wire motor, referring to... Figure 1-4 The stator core 1 includes an annular body 11 and several winding blocks 12 evenly arranged around the annular body 11. Several dovetail grooves 111 are evenly opened around the annular body 11. The winding blocks 12 are matched and inserted into the dovetail grooves 111. Flat wire windings 2 are wound on the surface of the winding blocks 12, and the flat wire windings 2 can be movably sleeved on the winding blocks 12. The cross-section of the winding blocks 12 is T-shaped, and the side of the winding blocks 12 away from the annular body 11 is an arc-shaped surface.

[0021] During the manufacturing process, the flat wire winding 2 can be wound individually and mass-produced. When in use, the flat wire winding 2 is simply placed on the winding block 12. Subsequently, each flat wire winding 2 can be connected in series or in parallel and welded together according to production requirements.

[0022] Reference Figure 3-4 The annular body 11 has symmetrical insulators 3 on its upper and lower sides. The insulators 3 on the upper and lower sides can wrap the upper and lower surfaces and sides of the annular body 11. The insulators 3 also have grooves 31 at the positions corresponding to the dovetail grooves 111. The grooves 31 and the dovetail grooves 111 have the same projected area. The insulators 3 have clearance grooves 32 at the positions corresponding to the dovetail grooves 111 on their periphery. The winding block 12 has an insulating layer 4 at the position corresponding to the flat wire winding 2.

[0023] By setting the insulator 3 and the insulating layer 4 on the surface of the winding block 12, it is possible to ensure electrical insulation between the flat wire winding 2 and the stator core 1, so as to prevent short circuit or electrical breakdown between the stator core 1 and the flat wire winding 2. In addition, it can also reduce noise and vibration.

[0024] Reference Figure 1 Rivet holes 5 are provided through the surfaces of the stator core 1 and the insulator 3 respectively.

[0025] The implementation principle of a segmented externally wound inner stator for a flat wire motor according to an embodiment of this application is as follows:

[0026] By setting the stator core 1 as an assembly type, the stator core 1 is assembled from an annular body 11 and winding blocks 12. During the manufacturing process, the flat wire windings 2 can be wound separately and mass-produced. When assembling the whole, simply put the flat wire windings 2 on the winding blocks 12, and then insert the winding blocks 12 into the dovetail grooves 111 of the annular body 11 in sequence (the winding blocks 12 and the annular body 11 are fixed by a bracket, which is not shown in the figure). Finally, according to the production requirements, the flat wire windings 2 can be connected in series or in parallel and welded together.

[0027] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A segmented externally wound inner stator for a flat wire motor, comprising a stator core (1), characterized in that: The stator core (1) includes an annular body (11) and several winding blocks (12) evenly arranged around the annular body (11). Several dovetail grooves (111) are evenly opened around the annular body (11). The winding blocks (12) are matched and inserted into the dovetail grooves (111). The surface of the winding blocks (12) is wound with flat wire windings (2), and the flat wire windings (2) can be movably sleeved on the winding blocks (12). The cross-section of the winding blocks (12) is T-shaped, and the side of the winding blocks (12) away from the annular body (11) is an arc-shaped surface.

2. The segmented externally wound inner stator for a flat wire motor according to claim 1, characterized in that: The annular body (11) has symmetrical insulators (3) on its upper and lower sides. The insulators (3) on the upper and lower sides can wrap the upper and lower surfaces and sides of the annular body (11). The insulators (3) also have grooves (31) at the positions corresponding to the dovetail grooves (111). The grooves (31) have the same orthographic projection area as the dovetail grooves (111).

3. The segmented externally wound inner stator for a flat wire motor according to claim 2, characterized in that: An insulating layer (4) is provided on the surface of the winding block (12) at the position corresponding to the flat wire winding (2).

4. The segmented externally wound inner stator for a flat wire motor according to claim 3, characterized in that: The insulator (3) has clearance grooves (32) on its periphery corresponding to the position of the dovetail groove (111).

5. The segmented externally wound inner stator for a flat wire motor according to claim 3, characterized in that: The stator core (1) and the insulator (3) have corresponding through-holes (5).

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