Stator structure of motor

Abstract

The invention discloses a stator structure of a motor, the stator structure of the motor comprises a plurality of block iron cores which are spliced together, each block iron core comprises a tooth part structure and a transverse arm, the transverse arm is located at the bottom of the tooth part structure, the transverse arm is provided with a first side surface and a second side surface along the two sides of the circumferential direction respectively, and the first side surface and the second side surface are arranged on the first side surface and the second side surface respectively. The first side face is located within the circumferential size of the tooth part structure, and the second side face is located outside the circumferential size of the tooth part structure; the first side face of the transverse arm of one iron core block is attached to the second side face of the transverse arm of the other iron core block. The transverse arms of the multiple block iron cores are attached to each other to form a yoke structure of the stator structure, and a tooth groove is formed between the tooth structures of every two adjacent block iron cores.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator structure of a motor. Background Art

[0002] Axial flux permanent magnet motor is a new type of motor, also known as diameter flux motor, which is a permanent magnet synchronous motor with the axial flux direction of the inner and outer rotors perpendicular to the rotation axis. The inner and outer rotors of the axial flux motor are composed of several superimposed cores and coils, and work in a flux channel with high flux density.

[0003] However, the stator core of the axial flux permanent magnet motor is made of wound silicon steel sheets, which will cause the silicon steel sheets to be constantly subjected to bending stress, causing the performance of the silicon steel sheets to deteriorate.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The main purpose of the present invention is to provide a stator structure of a motor, aiming to solve the above problems.

[0006] To achieve the above object, the present invention provides a stator structure of a motor, comprising a plurality of segmented iron cores spliced ​​together, each segmented iron core comprising a tooth structure and a transverse arm, the transverse arm being located at the bottom of the tooth structure, the transverse arm having a first side surface and a second side surface on both sides along the circumferential direction, the first side surface being located within the circumferential dimension of the tooth structure, and the second side surface being located outside the circumferential dimension of the tooth structure;

[0007] The first side surface of the transverse arm of one of the segmented iron cores is in contact with the second side surface of the transverse arm of the other segmented iron core;

[0008] The transverse arms of the plurality of segmented iron cores are attached to each other to form a yoke structure of the stator structure, and tooth slots are formed between the tooth structures of two adjacent segmented iron cores.

[0009] Preferably, in the stator structure of the motor, the first side surface and the second side surface are extended in the axial direction and are perpendicular to the top of the tooth structure.

[0010] Preferably, in the stator structure of the motor, the segmented iron core is formed by stacking a plurality of silicon steel sheets in a radial direction.

[0011] Preferably, in the stator structure of the motor, the tooth slot width is the same along the radial direction.

[0012] Preferably, in the stator structure of the motor, the first side surface is located below the circumferential center axis of the tooth structure.

[0013] Preferably, in the stator structure of the motor, a plug-in structure is provided between the first side surface and the second side surface, and the plug-in structure includes a concave-convex structure provided on the first side surface, and a matching structure provided on the second side surface;

[0014] When two adjacent segmented iron cores are spliced ​​together, the concave-convex structure on the first side of one of the segmented iron cores is plugged into the matching structure on the second side of the other segmented iron core; or, the matching structure on the second side of one of the segmented iron cores is plugged into the concave-convex structure on the first side of the other segmented iron core through the plug-in structure and then spliced ​​together.

[0015] Preferably, in the stator structure of the motor, the concave-convex structure is a concave portion, and the matching structure is a convex portion; or, the concave-convex structure is a convex portion, and the matching structure is a concave portion;

[0016] Wherein, the concave portion and the convex portion are extended in the radial direction.

[0017] Preferably, in the stator structure of the motor, one end of the recess is not completely penetrated in the radial direction and is formed with a stop portion, and the other end is completely penetrated;

[0018] When two adjacent segmented iron cores are spliced, the convex portion of one segmented iron core is inserted into the concave portion of the other segmented iron core and then abutted against the abutting portion.

[0019] Preferably, in the stator structure of the motor, when two adjacent segmented iron cores are spliced ​​together, a splicing gap is formed on the side of the transverse arm, and the width of the splicing gap is A, and A≤0.2 mm.

[0020] Preferably, in the stator structure of the motor, in the outer ring of the stator structure, the second side surface portion of the transverse arm exceeds the radial dimension setting of the tooth structure of the adjacent segmented iron core, and in the inner ring of the stator structure, the second side surface portion of the transverse arm is retracted into the radial dimension setting of the tooth structure of the adjacent segmented iron core.

[0021] The present invention has at least the following beneficial effects:

[0022] The present invention provides a motor stator structure including a plurality of block cores spliced ​​together, each block core including a tooth structure and a transverse arm, the transverse arm being located at the bottom of the tooth structure, the transverse arm having a first side surface and a second side surface on both sides along the circumferential direction, the first side surface being located within the circumferential dimension of the tooth structure, and the second side surface being located outside the circumferential dimension of the tooth structure;

[0023] The first side surface of the transverse arm of one of the segmented iron cores is in contact with the second side surface of the transverse arm of the other segmented iron core;

[0024] The lateral arms of multiple segmented iron cores fit together to form a yoke structure of the stator structure, and tooth slots are formed between the tooth structures of two adjacent segmented iron cores. This can solve the problem that the stator core of the axial flux permanent magnet motor is made of wound silicon steel sheets, and the winding will cause the silicon steel sheets to be constantly subjected to bending stress, which will cause the performance of the silicon steel sheets to deteriorate.

[0025] Furthermore, the present invention arranges a plurality of segmented iron cores by arranging a stator structure, each segmented iron core comprises a tooth structure and a transverse arm, and the transverse arm has a first side surface and a second side surface on both sides along the circumferential direction, respectively. The first side surface is located within the circumferential dimension of the tooth structure, and the second side surface is located outside the circumferential dimension of the tooth structure, presenting a "Z"-shaped structure. This solves the problem of bending stress in the traditional stator structure on the one hand, and facilitates the insertion of the coil on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of an embodiment of a stator structure of a motor provided by the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram from another perspective;

[0028] Figure 3 for Figure 1 Schematic diagram of the middle block core at one viewing angle;

[0029] Figure 4 for Figure 3 Schematic diagram of the middle block core from another perspective;

[0030] Figure 5 for Figure 3 Schematic diagram of the middle block core from another perspective;

[0031] Figure 6 for Figure 3 Process diagram of the middle-divided iron core being inserted into the coil.

[0032] Serial number name Serial number name 100 Motor stator structure 122 Second side 1 Segmented core 1221 Matching structure 11 Tooth structure 2 Tooth groove 12 Transverse arm 3 Stitching gap 121 First side 200 Coil 1211 Concave and convex structure

[0033] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0035] In the embodiments of the present invention, the term "and / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0037] In the embodiments of the present invention, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0038] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0039] Figure 1 and Figure 2 The schematic diagram of the stator structure of the motor provided by the present invention is shown as follows: Figure 1 and Figure 2 As shown, the present invention provides a stator structure 100 of a motor, and the stator structure 100 of the motor includes a plurality of segmented iron cores 1 spliced ​​together. Figures 3 to 5 Each segmented core 1 includes a tooth structure 11 and a transverse arm 12. The transverse arm 12 is located at the bottom of the tooth structure 11, and the transverse arm 12 has a first side surface 121 and a second side surface 122 on both sides along the circumferential direction, respectively. The first side surface 121 is located within the circumferential dimension of the tooth structure 11, and the second side surface 122 is located outside the circumferential dimension of the tooth structure 11; the first side surface 121 of the transverse arm 12 of one segmented core 1 is fitted with the second side surface 122 of the transverse arm 12 of another segmented core 1; the transverse arms 12 of multiple segmented cores 1 are fitted together to form a yoke structure of the stator structure, and a tooth slot 2 is formed between the tooth structures 11 of two adjacent segmented cores 1.

[0040] The present invention arranges a plurality of segmented cores 1 by arranging a stator structure, each segmented core 1 comprises a tooth structure 11 and a transverse arm 12, and the transverse arm 12 has a first side surface 121 and a second side surface 122 on both sides along the circumferential direction, respectively, the first side surface 121 is located within the circumferential dimension of the tooth structure 11, and the second side surface 122 is located outside the circumferential dimension of the tooth structure 11, presenting a similar "Z"-shaped structure, which solves the problem of bending stress of the traditional stator structure on the one hand, and can also facilitate the insertion of the coil 200 on the other hand. The segmented core 1 is formed by stacking a plurality of silicon steel sheets in the radial direction, which can further reduce the influence on the magnetic circuit.

[0041] More specifically, in the outer ring of the stator structure 100, the second side surface 122 of the transverse arm 12 partially exceeds the radial dimension setting of the tooth structure 11 of the adjacent segmented iron core 1, and in the inner ring of the stator structure 100, the second side surface 122 of the transverse arm 12 partially retracts into the radial dimension setting of the tooth structure 11 of the adjacent segmented iron core 1, thus presenting a "Z"-shaped structure.

[0042] The width of the tooth slot 2 is the same along the radial direction. It should be noted that the radial direction indicated in the present invention refers to the radial direction of the stator structure 100 of the motor.

[0043] It is worth noting that there is an installation space below the bottom of the tooth structure 11 on the opposite side of the transverse arm 12. When two adjacent segmented iron cores 1 are spliced, the transverse arm 12 of one segmented iron core 1 extends into the installation space of the other segmented iron core 1, and then is fixed together after being plugged in through the plug-in structure.

[0044] The first side surface 121 may extend from the approximately middle position of the bottom of the tooth structure 11 in a direction away from the tooth structure 11, or may extend from the middle position of the bottom of the tooth structure 11 in a direction away from the tooth structure 11 and perpendicular to the tooth structure 11. Since the first side surfaces 121 and the second side surfaces 122 of two adjacent segmented cores 1 are spliced, the second side surface 122 matches the first side surface 121, and the extension of the second side surface 122 may refer to the first side surface 121, which will not be described in detail here.

[0045] In this embodiment, the first side surface 121 and the second side surface 122 are arranged to extend along the axial direction and are arranged perpendicularly to the top of the tooth structure 11. In other embodiments, the first side surface 121 and the second side surface 122 may be arranged to be inclined relative to the axial direction. More specifically, the first side surface 121 is located below the circumferential center axis of the tooth structure 11, so that when two adjacent segmented cores 1 are spliced, the splicing gap is located on the center line of the tooth structure 11, which has less impact on the magnetic circuit.

[0046] It should be noted that no matter how the first side surface 121 and the second side surface 122 extend, as long as the plug-in structure provided on the first side surface 121 and the second side surface 122 is located in the middle position of the tooth structure 11 along the circumferential direction, the impact on the motor performance is minimized. More specifically, the plug-in structure is located in the low magnetic density area of ​​the stator structure, so that the impact on the motor performance is smaller.

[0047] Among them, the plug-in structure includes a concave-convex structure 1211 arranged on the first side 121, and a matching structure 1221 arranged on the second side 122; when two adjacent block cores 1 are spliced, the concave-convex structure 1211 on the first side 121 of one of the block cores 1 is plugged and matched with the matching structure 1221 on the second side 122 of the other block core 1; or, the matching structure 1221 on the second side 122 of one of the block cores 1 and the concave-convex structure 1211 on the first side 121 of the other block core 1 are spliced ​​together after being plugged through the plug-in structure.

[0048] The shapes of the concave-convex structure 1211 and the matching structure 1221 do not need to be specifically limited, and can be a regular cylindrical structure, an irregular cylindrical structure, or other pluggable structures. As long as the two can be plugged together. In this embodiment, the concave-convex structure 1211 can be a concave part and the matching structure 1221 can be a convex part; or the concave-convex structure 1211 can be a convex part and the matching structure 1221 can be a concave part. The concave part and the convex part are both extended radially.

[0049] The cross-sectional shape of the concave-convex structure 1211 can be set as required, and the cross-sectional shape of the matching structure 1221 matches the cross-sectional shape of the concave-convex structure 1211 .

[0050] In addition, in order to facilitate installation, one end of the recess is not completely penetrated in the radial direction and is formed with a stop portion, and the other end is completely penetrated; when two adjacent segmented cores 1 are spliced, the convex portion of one segmented core 1 is inserted into the recessed portion of the other segmented core 1 and then abutted against the stop portion. During installation, if the convex portion abuts against the stop portion, it is considered to be installed in place.

[0051] When two adjacent segmented cores 1 are spliced ​​together, a splicing gap 3 is formed on the side of the transverse arm 12. The smaller the width of the splicing gap 3, the better; if the splicing gap 3 is too large, it is equivalent to increasing the air gap of the motor, which will affect the output performance of the motor, for example, causing the output power of the motor to decrease. Therefore, in this embodiment, the width of the splicing gap is A, and A≤0.2mm.

[0052] In addition, the end of the transverse arm 12 away from the tooth structure 11 is arranged beyond the tooth structure 11 of the adjacent segmented iron core 1; in other embodiments, the end of the transverse arm 12 away from the tooth structure 11 may not exceed the tooth structure 11 of the adjacent segmented iron core 1, which can be specifically arranged according to the processing technology.

[0053] Figure 6 The schematic diagram shows the process of inserting the block core 1 provided by the present invention into the coil 200. Figure 6 As shown, the block core 1 provided by the present invention, each block core 1 includes a tooth structure 11, and a transverse arm 12 extending from the middle of the bottom of the tooth structure 11 to one side along the circumferential direction of the stator structure, so that the coil 200 can be directly inserted from the transverse arm 12 and then enter the tooth structure 11. The block core 1 provided by the present invention can not only solve the problem of bending stress of the traditional stator structure, but also facilitate the insertion of the coil 200.

[0054] The present invention further provides a motor, which includes the above-mentioned motor stator structure 100. The embodiment of the motor includes the embodiment of the above-mentioned motor stator structure 100, and the beneficial effects of the above-mentioned motor stator structure 100 can be applied to the motor.

[0055] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the present invention.

Claims

1. A stator structure of a motor, characterized in that: It comprises a plurality of segmented iron cores spliced ​​together, each segmented iron core comprises a tooth structure and a transverse arm, the transverse arm is located at the bottom of the tooth structure, and the transverse arm has a first side surface and a second side surface on both sides along the circumferential direction, the first side surface is located within the circumferential dimension of the tooth structure, and the second side surface is located outside the circumferential dimension of the tooth structure; The first side surface of the transverse arm of one of the segmented iron cores is in contact with the second side surface of the transverse arm of the other segmented iron core; The transverse arms of the plurality of segmented iron cores are attached to each other to form a yoke structure of the stator structure, and tooth slots are formed between the tooth structures of two adjacent segmented iron cores.

2. The stator structure of the motor according to claim 1, characterized in that: The first side surface and the second side surface are extended along the axial direction and are vertically arranged with respect to the top of the tooth structure.

3. The stator structure of the motor according to claim 1, characterized in that: The segmented iron core is formed by stacking a plurality of silicon steel sheets in a radial direction.

4. The stator structure of the motor according to claim 1, characterized in that: The tooth groove width is the same along the radial direction.

5. The stator structure of the motor according to claim 1, characterized in that: The first side surface is located below the circumferential center axis of the tooth structure.

6. The stator structure of the motor according to claim 1, characterized in that: A plug-in structure is provided between the first side surface and the second side surface, and the plug-in structure includes a concave-convex structure provided on the first side surface and a matching structure provided on the second side surface; When two adjacent segmented iron cores are spliced ​​together, the concave-convex structure on the first side of one of the segmented iron cores is plugged into the matching structure on the second side of the other segmented iron core; or, the matching structure on the second side of one of the segmented iron cores is plugged into the concave-convex structure on the first side of the other segmented iron core through the plug-in structure and then spliced ​​together.

7. The stator structure of the motor according to claim 6, characterized in that: The concavo-convex structure is a concave portion, and the matching structure is a convex portion; or, the concavo-convex structure is a convex portion, and the matching structure is a concave portion; Wherein, the concave portion and the convex portion are extended in the radial direction.

8. The stator structure of the motor according to claim 7, characterized in that: One end of the recessed portion is not completely penetrated in the radial direction and is formed with a stop portion, and the other end is completely penetrated; When two adjacent segmented iron cores are spliced, the convex portion of one segmented iron core is inserted into the concave portion of the other segmented iron core and then abutted against the abutting portion.

9. The stator structure of the motor according to claim 1, characterized in that: When two adjacent segmented iron cores are spliced ​​together, a splicing gap is formed on the side of the transverse arm, and the width of the splicing gap is A, and A≤0.2mm.

10. The stator structure of the motor according to claim 1, characterized in that: In the outer ring of the stator structure, the second side surface of the transverse arm exceeds the radial dimension setting of the tooth structure of the adjacent segmented iron core, and in the inner ring of the stator structure, the second side surface of the transverse arm is indented into the radial dimension setting of the tooth structure of the adjacent segmented iron core.

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