Stator structure of motor and motor
By designing a segmented iron core structure and magnetically conductive metal components, the bending stress problem caused by the winding of silicon steel sheets was solved, improving motor performance and strength while reducing iron loss.
Patent Information
- Application Number
- CN202422771298.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-13
AI Technical Summary
The stator core of an axial flux permanent magnet motor is made of silicon steel sheets wound together, which causes the silicon steel sheets to be subjected to bending stress, resulting in performance degradation and increased iron loss.
The structure employs multiple segmented iron cores, each segmented iron core including a first vertical arm structure, a second vertical arm structure, and a horizontal arm structure. The splicing gap is located in the middle of the toothed structure, and the horizontal arm structure forms the yoke. The magnetically conductive metal parts are installed in the cylindrical space and fixed by potting adhesive.
This reduces the impact of bending stress on silicon steel sheets, lowers iron loss, improves motor output performance, and enhances the overall strength of the stator structure.
Smart Images
Figure CN223583905U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field especially relates to a stator structure of motor and motor. BACKGROUND
[0002] Axial flux permanent magnet motor is a new type of motor, also known as diameter magnetic flux motor, is a kind of permanent magnet synchronous motor by the axial flux direction of inside and outside rotor and rotation shaft vertical.Axial flux motor inside and outside rotor is combined by a plurality of superimposed iron core and coil, works in the magnetic flux channel of high magnetic flux density.
[0003] However, axial flux permanent magnet motor stator core is made of silicon steel sheet winding, winding will make silicon steel sheet bear bending stress all the time, will cause silicon steel sheet performance deterioration.
[0004] The above content is only used to assist understanding the technical scheme of the utility model, and does not represent that the above content is prior art. UTILITY MODEL CONTENT
[0005] The main purpose of the utility model is to provide a kind of stator structure of motor and motor, to solve the above problems.
[0006] To achieve the above object, the utility model provides a kind of stator structure of motor, the stator structure of motor includes a plurality of spliced together block iron core, each block iron core includes two oppositely arranged and vertically extending first vertical arm structure and second vertical arm structure, and cross arm structure, the cross arm structure extends from the end of the first vertical arm structure to the end of the second vertical arm structure along the transverse direction, the first vertical arm structure and the second vertical arm structure are located at the same side of the cross arm structure, the first vertical arm structure and the second vertical arm structure are transversely spaced apart to form the tooth slot of stator structure, the width of the first vertical arm structure and the second vertical arm structure along the transverse direction is same;
[0007] Wherein, the first vertical arm structure and the second vertical arm structure of adjacent two block iron cores are spliced together to form the tooth structure of stator structure, the splicing gap is located at the intermediate position of the tooth structure, and the cross arm structure connected together forms the yoke structure of stator structure.
[0008] Preferably, in the stator structure of motor, the two sides of the cross arm structure are respectively provided with first concave-convex structure and first matching structure;
[0009] When adjacent two block iron cores are spliced together, the first concave-convex structure of one block iron core is inserted together with the first matching structure of another block iron core.
[0010] Preferably, in the stator structure of the motor, the first concave-convex structure is a concave part, and the first matching structure is a convex part.
[0011] Preferably, in the stator structure of the motor, the first concave-convex structure is a convex part, and the first matching structure is a concave part.
[0012] Preferably, in the stator structure of the motor, the width of the tooth slot is consistent in each tangential section.
[0013] Preferably, in the stator structure of the motor, the width of the first vertical arm structure is the same as the width of the second vertical arm structure in each tangential section.
[0014] Preferably, in the stator structure of the motor, the lateral arm structure is provided with a recess structure on both sides.
[0015] When two adjacent split iron cores are spliced together, the recess structure of one split iron core and the recess structure of the other split iron core form a cylindrical space.
[0016] The cylindrical space is provided with a magnetically conductive metal part.
[0017] Preferably, in the stator structure of the motor, the two ends of the magnetically conductive metal part respectively extend out of the cylindrical space, one end extends towards the inner ring of the stator structure and protrudes out of the inner ring of the stator structure, and the other end extends towards the outer ring of the stator structure and protrudes out of the outer ring of the stator structure.
[0018] Preferably, in the stator structure of the motor, the cylindrical space is a circular cylindrical space.
[0019] Correspondingly, the shape of the magnetically conductive metal part is a circular cylinder.
[0020] Preferably, in the stator structure of the motor, each split iron core includes a plurality of silicon steel sheets formed by radially stacking laminations, each silicon steel sheet includes two first and second sub-arm structures arranged opposite to each other and extending vertically, and a third sub-arm structure extending laterally from the end of the first sub-arm structure to the end of the second sub-arm structure, and the first and second sub-arm structures are located on the same side of the third sub-arm structure.
[0021] The plurality of first sub-arm structures are radially stacked together to form the first vertical arm structure, the plurality of second sub-arm structures are radially stacked together to form the second vertical arm structure, and the plurality of third sub-arm structures are radially stacked together to form the lateral arm structure.
[0022] Preferably, in the stator structure of the motor, the width of the splicing gap is A, and A≤0.2mm.
[0023] In order to achieve the above object, the utility model provides a motor, the motor includes the stator structure of above-mentioned motor.
[0024] The utility model at least has following beneficial effect:
[0025] The utility model discloses a motor's stator structure includes a plurality of spliced together's partial core, and each partial core includes two opposite and along vertical extension's first vertical arm structure and second vertical arm structure and cross arm structure, the cross arm structure from the end of first vertical arm structure extends to the end of second vertical arm structure along the transverse, first vertical arm structure and second vertical arm structure are located at the same side of cross arm structure, and first vertical arm structure and second vertical arm structure are arranged along the transverse interval to form the tooth slot of stator structure, and the width of first vertical arm structure and second vertical arm structure along the transverse is same, wherein, the first vertical arm structure and second vertical arm structure of adjacent two partial cores form the joint gap when splicing together, and the first vertical arm structure and second vertical arm structure of adjacent two partial cores form the tooth structure of stator structure in common, and the joint gap is located at the intermediate position of tooth structure, and the cross arm structure that is connected together forms the yoke structure of stator structure, and this can solve the problem that axial flux permanent magnet motor stator core is made of silicon steel sheet winding, and winding makes silicon steel sheet bear bending stress all the time, and can cause the performance deterioration of silicon steel sheet.
[0026] Further, through the stator structure includes a plurality of partial cores, the joint gap of adjacent two partial cores is located at the intermediate position of tooth structure, so on one hand can solve the influence that the conventional winding core makes silicon steel sheet bear bending stress all the time, and bending stress can cause the performance deterioration of silicon steel sheet, and iron loss increases, and on the other hand the influence of motor magnetic circuit is minimum.
[0027] Further, the utility model discloses two opposite and along vertical extension's first vertical arm structure and second vertical arm structure and cross arm structure through each partial core, the cross arm structure from the end of first vertical arm structure extends to the end of second vertical arm structure along the transverse, first vertical arm structure and second vertical arm structure are located at the same side of cross arm structure, and first vertical arm structure and second vertical arm structure are arranged along the transverse interval to form the tooth slot of stator structure, so form similar " U " type structure, and manufacturing process is simpler. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 It is the schematic diagram of the embodiment of the utility model provides motor's stator structure;
[0029] Figure 2 It is Figure 1 The schematic diagram of radial lamination;
[0030] Figure 3 It isFigure 1 Schematic view of a middle split core;
[0031] Figure 4 Schematic view of a middle split core; Figure 3 Schematic view of a middle split core from another perspective;
[0032] Figure 5 Schematic view of another embodiment of the stator structure of the motor.
[0033]
[0034]
[0035] The purposes, functional features and advantages of the motor will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0036] The technical solutions of the motor will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the motor, not all the embodiments. The motor will be described in detail below with reference to the accompanying drawings and the embodiments. It should be noted that the embodiments in the motor and the features in the embodiments can be combined with each other without conflict.
[0037] In the embodiments of the motor, the term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.
[0038] It should be noted that the terms "first", "second", and the like in the specification and claims of the motor and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.
[0039] In the embodiments of the motor, the term "multiple" means two or more, and other quantifiers are similar.
[0040] In the motor, the orientation words such as "up, down, top, bottom" are generally directed to the direction shown in the drawings, or directed to the vertical, perpendicular or gravity direction of the components themselves. Similarly, for the convenience of understanding and description, "inner, outer" means the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the motor.
[0041] Figure 1 The schematic view of the first embodiment of the stator structure of the motor is shown. Figure 2A schematic view of the radial laminations is shown. See Figure 1 and Figure 2 The stator structure 100 of the motor comprises a plurality of split cores 1 spliced together, each split core 1 comprises two oppositely arranged and vertically extending first and second vertical arm structures 11 and 12, and a horizontal arm structure 13 extending horizontally from the end of the first vertical arm structure 11 to the end of the second vertical arm structure 12, the first and second vertical arm structures 11 and 12 are located on the same side of the horizontal arm structure 13, and the first and second vertical arm structures 11 and 12 are spaced apart in the horizontal direction to form a tooth slot of the stator structure, and the first and second vertical arm structures 11 and 12 have the same width in the horizontal direction; wherein the first and second vertical arm structures 11 and 12 of the adjacent two split cores 1 form a splicing gap 2 when spliced together, the first and second vertical arm structures 11 and 12 of the adjacent two split cores 1 jointly form a tooth structure of the stator structure, the splicing gap 2 is located at the middle position of the tooth structure, and the horizontal arm structures 13 connected together form a yoke structure of the stator structure.
[0042] It should be noted that the middle position of the tooth structure in the utility model refers to the position of the center line of each tooth structure, which extends in the axial direction; rather than the approximate middle position of each tooth structure.
[0043] By arranging the splicing gap 2 at the middle position of the tooth structure, on the one hand, the problem that the conventional wound core causes the silicon steel sheet to always bear the bending stress, which can cause the performance of the silicon steel sheet to deteriorate and the iron loss to increase, can be solved, and on the other hand, the influence on the magnetic circuit of the motor is minimized.
[0044] The smaller the width of the splicing gap 2 is, the better; if the splicing gap 2 is too large, it is equivalent to increasing the air gap of the motor, which can affect the output performance of the motor, such as causing the output power of the motor to decrease, therefore, in the embodiment, the width of the splicing gap is A, and A≤0.2mm.
[0045] More specifically, each split core 1 is formed by radial laminations, each split core 1 comprises a plurality of silicon steel sheets formed by radial laminations, each silicon steel sheet comprises two oppositely arranged and vertically extending first and second sub-arm structures 111 and 121, and a third sub-arm structure 131 extending horizontally from the end of the first sub-arm structure 111 to the end of the second sub-arm structure 121, the first and second sub-arm structures 111 and 121 are located on the same side of the third sub-arm structure 131; a plurality of first sub-arm structures 111 are laminated together in the radial direction to form the first vertical arm structure 11, a plurality of second sub-arm structures 121 are laminated together in the radial direction to form the second vertical arm structure 12, and a plurality of third sub-arm structures 131 are laminated together in the radial direction to form the horizontal arm structure 13.
[0046] It is worth noting that the conventional winding core will make the silicon steel sheet always bear the bending stress, which will cause the performance of the silicon steel sheet to deteriorate and the iron loss to increase. The embodiment of the utility model divides the original silicon steel sheet winding core into blocks, and the block core 1 is formed in a radial lamination, which can reduce the influence of the stress.
[0047] Figure 3 And Figure 4 The schematic diagram of the splicing structure adopted by the stator structure 100 of the motor of the utility model is shown. As shown in Figure 3 And Figure 4 As shown, the first concave-convex structure 13a and the first matching structure 13b are arranged on the two sides of the cross arm structure 13 respectively; when the two adjacent block cores 1 are spliced together, the first concave-convex structure 13a of one block core 1 is inserted into the first matching structure 13b of the other block core 1.
[0048] Since the splicing gap 2 is arranged at the middle position of the tooth structure, that is, the splicing position of the first concave-convex structure 13a and the first matching structure 13b is located at the middle position of the tooth structure. More specifically, the first concave-convex structure 13a and the first matching structure 13b are arranged in the low magnetic density area of the stator structure, so that the influence on the performance of the motor is minimal. The shape of the first concave-convex structure 13a and the first matching structure 13b is not limited in particular, which can be a regular cylindrical structure or an irregular cylindrical structure, as long as the two can be inserted together. In this embodiment, the first concave-convex structure 13a can be a concave part, and the first matching structure 13b can be a convex part; or the first concave-convex structure 13a can be a convex part, and the first matching structure 13b can be a concave part. The concave part and the convex part are both arranged in the radial direction.
[0049] In addition, when the first concave-convex structure 13a is a concave part, one end of the concave part is provided with a stop portion 132, so that when the convex part is inserted into the concave part, it can be stopped at the stop portion 132, thereby prompting the installation to be in place.
[0050] It should be noted that the normal motor magnetic circuit goes down in the middle of the tooth structure, and the magnetic circuit moves to the two sides at the middle junction of the tooth structure and the yoke structure, and the bifurcation area formed in the middle is the low magnetic density area.
[0051] In addition, as shown in Figure 3 As shown, the width W3 of the tooth slot is consistent in each tangential cross section. Further, the width W3 of each tooth slot in the circumferential cross section is the same. In each tangential cross section, the width W1 of the first vertical arm structure 11 and the width W2 of the second vertical arm structure 12 are the same. Specifically, the width W1 of the first vertical arm structure 11 and the width W2 of the second vertical arm structure 12 in the same circumferential cross section are the same, so that the splicing gap of the two adjacent block cores 1 is located at the middle position of the tooth structure in the circumferential direction, so that the influence on the magnetic circuit is minimal.
[0052] It should be noted that the circumferential direction in the utility model refers to the circumferential direction of the stator structure 100 of the motor, and the radial direction in the utility model refers to the radial direction of the stator structure 100 of the motor.
[0053] Figure 5 A schematic diagram of the stator structure 100 of the motor in the utility model adopting another splicing structure is shown. Figure 5 As shown in the figure, the two sides of the cross arm structure 13 are each provided with a recess structure 13c; when two adjacent segment cores 1 are spliced together, the recess structure 13c of one segment core 1 and the recess structure 13c of the other segment core 1 surround to form a cylindrical space; a magnetically conductive metal piece 3 is installed in the cylindrical space. After the magnetically conductive metal piece 3 is installed, it is fixed by pouring sealant.
[0054] Specifically, the two ends of the magnetically conductive metal piece 3 respectively extend out of the cylindrical space, one end extends towards the inner ring of the stator structure and protrudes out of the inner ring of the stator structure, and the other end extends towards the outer ring of the stator structure and protrudes out of the outer ring of the stator structure. In this way, when the stator structure is installed into the shell of the motor, the two ends of the magnetically conductive metal piece 3 can respectively extend into the corresponding positions of the shell, playing a role of overall positioning and strengthening the overall structural strength. Since the stator structure is subjected to axial force and the other side is attracted by the magnetic steel, the magnetic steel will pull the positioning structure towards the magnetic steel surface, so the positioning structure will bear a force to separate from the shell. The utility model sets pouring sealant, so that the stator structure and the shell form a whole, and the force acting on the pouring sealant will also act on the magnetically conductive metal piece 3, so as to play a role of strengthening the overall structural strength.
[0055] The cross-sectional shape of the recess structure 13c can be set as needed, for example, the recess structure 13c can be a square groove or an arc-shaped groove. When the cross-section of the recess structure 13c is square, the cylindrical space is a square cylindrical space; when the cross-section of the recess structure 13c is semicircular, the cylindrical space is a cylindrical space. The cylindrical space is a cylindrical space; accordingly, the shape of the magnetically conductive metal piece 3 is cylindrical.
[0056] The utility model also provides a motor, which comprises the above-mentioned stator structure 100 of the motor. The embodiments of the motor include the embodiments of the above-mentioned stator structure 100 of the motor, and the beneficial effects of the above-mentioned stator structure 100 of the motor can be applied to the motor.
[0057] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, those skilled in the art can make other different forms of changes or modifications without creative labor, and all of them should belong to the protection scope of the utility model.
Claims
1. A stator structure for an electric motor, characterized in that, The motor comprises a plurality of spliced sub-core blocks, each of which comprises two first vertical arm structures and second vertical arm structures arranged oppositely and extending vertically, and a horizontal arm structure extending horizontally from the end of the first vertical arm structure to the end of the second vertical arm structure, the first vertical arm structure and the second vertical arm structure are located on the same side of the horizontal arm structure, and the first vertical arm structure and the second vertical arm structure are arranged horizontally to form a tooth slot of a stator structure, and the widths of the first vertical arm structure and the second vertical arm structure are the same. The first vertical arm structure and the second vertical arm structure of the adjacent two sub-core blocks form a tooth structure of the stator structure, and the spliced joint gap is located in the middle of the tooth structure.
2. The stator structure of the electric motor as recited in claim 1, wherein The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure. When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block.
3. The stator structure of the electric motor as claimed in claim 1, wherein In each tangential cross section, the width of the tooth slot is consistent.
4. The stator structure of the electric motor as recited in claim 1, wherein In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same.
5. The stator structure of the electric motor as recited in claim 1, wherein The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure. When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block. In each tangential cross section, the width of the tooth slot is consistent.
6. The stator structure of the electric motor as recited in claim 5, wherein In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same.
7. The stator structure of the electric motor as recited in claim 5, wherein The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure. When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block.
8. The stator structure of the electric motor as recited in claim 1, wherein In each tangential cross section, the width of the tooth slot is consistent. In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same.
9. The stator structure of the electric motor as recited in claim 1, wherein The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure.
10. An electric machine characterized by When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block. In each tangential cross section, the width of the tooth slot is consistent. In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same. The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure. When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block. In each tangential cross section, the width of the tooth slot is consistent. In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same. The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure. When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block. In each tangential cross section, the width of the tooth slot is consistent. In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same. The two sides of the horizontal arm structure are respectively provided with a first concave-convex structure and a first matching structure. When the adjacent two sub-core blocks are spliced together, the first concave-convex structure of one of the sub-core blocks is inserted into the first matching structure of the other sub-core block. In each tangential cross section, the width of the tooth slot is consistent. In each tangential cross section, the width of the first vertical arm structure and the width of the second vertical arm structure are the same. The motor comprises a stator structure of the motor as claimed in any one of claims 1 to 9.