Split outer opening slot motor stator, motor and electrical equipment

Abstract

The utility model provides a kind of outer opening slot split type motor stator, motor and electrical equipment, the outer opening slot split type motor stator includes core, core includes fixed ring and multiple splicing blocks, splicing block has the yoke portion of being connected, winding portion and tooth portion, multiple splicing blocks are connected by yoke portion and present annular arrangement, yoke portion, winding portion and tooth portion are limited to form wire slot, the opening of wire slot is towards the side of back to core axis, fixed ring is attached in the axial end surface of splicing block, fixed ring is fixedly connected between with each splicing block.The utility model sequentially splices by multiple splicing blocks and is connected with each splicing block one by one by fixed ring, to form the stable structure of stator, it is helpful to promote the performance and service life of stator.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to an externally open slotted segmented motor stator, motor, and electrical equipment. Background Technology

[0002] In motor manufacturing, externally slotted segmented cores typically employ connecting slots and connecting blocks to achieve a stable connection between the segments. In some applications, motor miniaturization is required, leading to a significant reduction in the yoke size of the segmented core. However, due to limited space in the yoke, it is difficult to machine connecting slots or blocks within it. Even if connecting slots and blocks are forcibly incorporated, the continuity of the yoke is disrupted, creating localized stress concentration areas, reducing the mechanical strength of the yoke, and severely impacting the motor's lifespan and reliability. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this utility model propose an externally slotted segmented motor stator, a motor, and electrical equipment. This externally slotted segmented motor stator is constructed by sequentially splicing multiple splicing blocks and connecting each splicing block individually with a fixing ring, thereby forming a stable structure for the stator and helping to improve the stator's performance and service life.

[0004] The externally slotted segmented motor stator provided by this utility model includes an iron core, which includes a fixing ring and multiple splicing blocks. Each splicing block has a connected yoke, a winding part, and a toothed part. The multiple splicing blocks are connected by the yoke and arranged in a ring. The yoke, the winding part, and the toothed part define a wire receiving groove. The opening of the wire receiving groove faces the side opposite to the axis of the iron core. The fixing ring is fitted to the axial end face of the splicing block, and the fixing ring is fixedly connected to each splicing block.

[0005] In some embodiments, the fixing ring is disposed on the yoke of the splicing block, and the fixing ring and the yoke of each splicing block are laser welded together.

[0006] In some embodiments, the retaining ring is located at the center of the yoke in the radial direction of the iron core, and welding points are provided on both the outer and inner sides of the retaining ring.

[0007] In some embodiments, a plurality of fixing rings are provided, and the plurality of fixing rings are respectively located at both ends of the splicing block along the axial direction of the splicing block.

[0008] In some embodiments, the externally open slotted segmented motor stator further includes a wire, which is wound inside the wire groove, and the minimum gap between the wires in the wire grooves of two adjacent splicing blocks is set to 0.5 to 1 times the wire diameter.

[0009] In some embodiments, the gap between the teeth of two adjacent splicing blocks is less than or equal to the wire diameter.

[0010] In some embodiments, the splicing block includes a plurality of segmented punches, which are stacked on top of each other and connected in sequence.

[0011] In some embodiments, the segmented laminations are made of silicon steel sheets.

[0012] Based on the same inventive concept, this utility model also provides an electric motor, which includes the externally slotted segmented motor stator provided in any of the above embodiments. Furthermore, this utility model also provides an electrical device that includes the above-described electric motor. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of an externally slotted, segmented motor stator provided in an embodiment of this utility model.

[0014] Figure 2 This is a cross-sectional schematic diagram of an externally slotted, segmented motor stator provided in one embodiment of the present invention.

[0015] Figure 3 yes Figure 2 A magnified view of a portion of point C.

[0016] Figure 4 This is a schematic diagram of the winding of an externally slotted, segmented motor stator provided in one embodiment of the present invention.

[0017] Figure label:

[0018] 11. Iron core;

[0019] 12. Connecting block; 121. Yoke; 122. Winding part; 123. Toothed part; 124. Wire groove;

[0020] 13. Fixing ring; 14. Wire. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] like Figures 1 to 4As shown, one embodiment of this utility model provides an externally open slotted segmented motor stator, which includes an iron core 11. The iron core 11 includes a fixing ring 13 and a plurality of splicing blocks 12. The splicing blocks 12 have a yoke 121, a winding part 122 and a toothed part 123 connected to each other. The plurality of splicing blocks 12 are connected by the yoke 121 and arranged in a ring. The yoke 121, the winding part 122 and the toothed part 123 define a wire receiving groove 124. The opening of the wire receiving groove 124 faces the side opposite to the axis of the iron core 11. The fixing ring 13 is fitted to the axial end face of the splicing block 12 and is fixedly connected to each splicing block 12.

[0023] Specifically, multiple splicing blocks 12 are sequentially abutted by the yoke 121 and arranged in a ring to form the main body of the iron core 11. That is, during the winding process, each splicing block 12 can be wound independently. After the winding of each splicing block 12 is completed, all the splicing blocks 12 are precisely spliced ​​together to form a complete ring structure. Then, the fixing ring 13 is attached to the axial end face of the splicing block 12, and the fixing ring 13 is fixedly connected to each splicing block 12 one by one. This tightly binds the splicing blocks 12 together and prevents them from being relatively displaced or loosened due to complex forces such as electromagnetic force and centrifugal force during motor operation, which could affect the stator structure and reduce the performance and life of the motor.

[0024] In summary, the externally slotted segmented motor stator provided by this utility model is formed by sequentially splicing multiple splicing blocks 12 and connecting each splicing block 12 one by one with a fixing ring 13, thereby forming a stable structure of the stator, which helps to improve the performance and service life of the stator.

[0025] like Figure 2 and Figure 3 As shown, in some embodiments, a fixing ring 13 is disposed on the yoke 121 of the splicing block 12, and the fixing ring 13 and the yoke 121 of each splicing block 12 are connected by laser welding. Laser welding is a highly efficient welding technology that uses a high-energy-density laser beam as a heat source to rapidly melt and solidify a localized area of ​​material, thereby achieving a connection. The laser beam can be focused onto an extremely small area, generating extremely high energy density, which can avoid the possibility of an excessively large heat-affected zone in the connection between the fixing ring 13 and the yoke 121, which could potentially alter the material properties.

[0026] Furthermore, the retaining ring 13 is located in the middle of the yoke 121 in the radial direction of the iron core 11, and welding points are provided on both the outer and inner sides of the retaining ring 13 to form a stable connection.

[0027] Furthermore, multiple fixing rings 13 are provided, and the multiple fixing rings 13 are respectively located at both ends of the splicing block 12 along the axial direction of the splicing block 12. In this embodiment, two fixing rings 13 are provided, and the two fixing rings 13 are located opposite each other at both ends of the splicing block 12 along the axial direction of the splicing block 12, thereby clamping the splicing block 12 between the two fixing rings 13 and restricting the movement of the splicing block 12. Of course, in other embodiments of this utility model, the fixing rings 13 may also be set to 3, 4, etc., which will not be described in detail here.

[0028] like Figure 1 , Figure 4 As shown, in some embodiments, the externally slotted segmented motor stator further includes wires 14, which are wound within wire slots 124. The minimum gap between the wires 14 in the wire slots 124 of two adjacent splicing blocks 12 is set to 0.5 to 1 times the wire diameter. This minimum gap between the wires 14 in the wire slots 124 of two adjacent splicing blocks 12 allows for maximizing the filling amount of the wires 14 while ensuring sufficient space between them to avoid mutual interference, thereby maximizing the slot fill factor and effectively improving the motor efficiency. Figure 4 The gap referred to in B is the minimum gap between the conductors 14 in the slots 124 of two adjacent splicing blocks 12.

[0029] It should be noted that the minimum gap between the conductors 14 in the slots 124 of two adjacent splicing blocks 12, set to 0.5 to 1 times the wire diameter, is the optimal solution derived by technicians through extensive research and theoretical analysis. If the gap is too small, less than 0.5 times the wire diameter, the conductors 1412 may be squeezed together during motor operation due to thermal expansion, vibration, and other factors, leading to insulation damage and short-circuit faults, seriously affecting the service life and safety of the motor. On the other hand, if the gap is too large, exceeding 1 times the wire diameter, it may increase the risk of leakage flux in the motor, reduce motor efficiency, and also lead to an increase in motor size, which is not conducive to the compact design of the equipment.

[0030] In some embodiments, the gap between the teeth 123 of two adjacent splicing blocks 12 is less than or equal to the wire diameter of the conductor 14, thereby improving the NVH (Noise, Vibration, Harshness) performance of the motor. Specifically, the gap between the teeth 123 of two adjacent splicing blocks 12 affects the uniformity of the magnetic field and the stress state of the teeth 123. If the gap is too large, the teeth 123 are prone to vibration under the action of electromagnetic force, resulting in increased noise; while a gap ≤ wire diameter can limit the free vibration space of the teeth 123, reducing noise caused by vibration. Furthermore, a gap between two teeth 123 ≤ wire diameter can also reduce magnetic leakage in the magnetic circuit, making the magnetic field energy more concentrated in the interaction area between the teeth 123 and the rotor, improving energy conversion efficiency, and reducing vibration caused by magnetic leakage. Figure 4 The gap referred to in A is the gap between the teeth 123 of two adjacent splicing blocks 12.

[0031] In this embodiment, the tooth 123 has a smooth curved surface, which can avoid the risk of scratching the wire 14.

[0032] In some embodiments, the splicing block 12 includes multiple segmented laminations, which are stacked and connected sequentially. The stacking of these segmented laminations forms a more uniform and continuous magnetic circuit. During motor operation, the magnetic field can be smoothly conducted through these stacked segmented laminations, reducing magnetic leakage.

[0033] Furthermore, the segmented laminations are made of silicon steel sheets, which have excellent magnetic permeability, enabling the motor to generate a stronger magnetic field under the same current input, thereby improving the motor's torque output.

[0034] In this embodiment, as Figure 4 As shown, the area of ​​the groove 124 formed between the winding portions 122 of two adjacent splicing blocks 12 can reach 21.4 mm². 2 (square millimeters). Among them, the technicians found through experiments that the parameters of the externally open slotted segmented motor stator when wound with wires 14 of different diameters are shown in Table 1 below.

[0035]

[0036] Based on the same inventive concept, this utility model also provides an electric motor, which includes the externally slotted, segmented motor stator provided in any of the above embodiments. Furthermore, this utility model also provides an electrical device that includes the aforementioned electric motor.

[0037] It should be noted that the motor and electrical equipment provided in this application embodiment have the same implementation principle and technical effect as the aforementioned externally slotted split motor stator embodiment. For the sake of brevity, any parts not mentioned in the motor and electrical equipment embodiment can be referred to the corresponding content in the aforementioned externally slotted split motor stator embodiment.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] In this utility model, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A segmented motor stator with externally open slots, characterized in that, The device includes an iron core, which comprises a fixing ring and multiple splicing blocks. Each splicing block has a connected yoke, a winding portion, and a toothed portion. The multiple splicing blocks are connected by the yoke and arranged in a ring. The yoke, the winding portion, and the toothed portion define a wire receiving groove. The opening of the wire receiving groove faces away from the axis of the iron core. The fixing ring is fitted to the axial end face of the splicing block and is fixedly connected to each splicing block.

2. The externally slotted, segmented motor stator according to claim 1, characterized in that, The fixing ring is located on the yoke of the splicing block, and the fixing ring and the yoke of each splicing block are laser welded together.

3. The externally slotted, segmented motor stator according to claim 2, characterized in that, The fixing ring is located in the middle of the yoke in the radial direction of the iron core, and welding points are provided on both the outer and inner sides of the fixing ring.

4. The externally slotted, segmented motor stator according to claim 2, characterized in that, The fixing rings are provided in multiple ways, and the multiple fixing rings are respectively located at both ends of the splicing block along the axial direction of the splicing block.

5. The externally slotted, segmented motor stator according to claim 1, characterized in that, It also includes a wire, which is wound inside the wire groove, and the minimum gap between the wires in the wire grooves of two adjacent splicing blocks is set to 0.5 to 1 times the wire diameter.

6. The externally slotted, segmented motor stator according to claim 1, characterized in that, The gap between the teeth of two adjacent splicing blocks is less than or equal to the wire diameter.

7. The externally slotted, segmented motor stator according to claim 1, characterized in that, The splicing block includes multiple segmented punches, which are stacked on top of each other and connected in sequence.

8. The externally slotted, segmented motor stator according to claim 7, characterized in that, The segmented laminations are made of silicon steel sheets.

9. An electric motor, characterized in that, The stator of the externally open slotted motor as described in any one of claims 1 to 8.

10. An electrical appliance, characterized in that, It includes the motor as described in claim 9.

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