Stator block, motor stator, motor and electrical equipment

Abstract

The invention relates to a stator block, a motor stator, a motor and electrical equipment, and belongs to the technical field of motors. The stator block is made of oriented silicon steel and comprises stator teeth, a first stator yoke and a second stator yoke; the stator tooth comprises a main body part and a connecting part which are connected, the connecting part is provided with a first connecting surface and a second connecting surface which are deviated from each other, and the distance between the first connecting surface and the second connecting surface is gradually reduced in the direction that the main body part points to the connecting part; the first stator yoke and the second stator yoke are respectively connected with one end, far away from the main body part, of the connecting part, the first stator yoke is contacted with the first connecting surface, and the second stator yoke is contacted with the second connecting surface. According to the invention, the magnetic circuit length of the motor stator can be shortened, thereby reducing the overall magnetic resistance of a magnetic induction line passing through the stator, reducing the iron loss, improving the torque and efficiency of the motor, and achieving the improvement of the performance of the motor.

Description

Technical Field

[0001] This disclosure relates to the field of motor technology, and in particular to a stator block, a motor stator, a motor, and electrical equipment. Background Technology

[0002] Electric motors are the core driving components of industrial equipment. Nowadays, to improve motor performance, motor stators are typically made of grain-oriented silicon steel.

[0003] Currently, a stator typically consists of stator teeth and a stator yoke that are separated from each other. The stator yoke has dovetail grooves, and the stator teeth have protrusions that are adapted to the dovetail grooves. The stator yoke and the stator teeth are connected by the dovetail grooves and the protrusions.

[0004] However, with the above structure, the magnetic circuit length of the magnetic field lines in the stator is relatively large during the operation of the motor, which makes the overall magnetic reluctance of the stator high, resulting in lower motor torque and lower efficiency. Summary of the Invention

[0005] This disclosure provides a stator block, a motor stator, a motor, and electrical equipment, which can solve the technical problems existing in related technologies. The technical solutions of the stator block, motor stator, motor, and electrical equipment are as follows:

[0006] In a first aspect, this disclosure provides a stator block, the stator block including stator teeth, a first stator yoke, and a second stator yoke;

[0007] The stator tooth includes a connected main body and a connecting part. The connecting part has a first connecting surface and a second connecting surface that are opposite to each other. In the direction from the main body to the connecting part, the distance between the first connecting surface and the second connecting surface gradually decreases.

[0008] The first stator yoke and the second stator yoke are respectively connected to the end of the connecting portion away from the main body portion, the first stator yoke is in contact with the first connecting surface, and the second stator yoke is in contact with the second connecting surface;

[0009] Wherein, the rolling direction of the stator teeth is along the radial direction of the stator block; when the first stator yoke is in contact with the first connecting surface, the rolling direction of the first stator yoke is along the first tangential direction of the stator block; when the second stator yoke is in contact with the second connecting surface, the rolling direction of the second stator yoke is along the second tangential direction of the stator block, and the second tangential direction is the opposite of the first tangential direction.

[0010] In some possible implementations, the first connecting surface has a first snap-fit ​​structure, the first stator yoke has a second snap-fit ​​structure, and the second snap-fit ​​structure snaps into the first snap-fit ​​structure.

[0011] The second connecting surface has a third snap-fit ​​structure, and the second stator yoke has a fourth snap-fit ​​structure, which snaps into the third snap-fit ​​structure.

[0012] In some possible implementations, the first and third snap-fit ​​structures are both groove structures, while the second and fourth snap-fit ​​structures are both protrusion structures.

[0013] In some possible implementations, the end of the first stator yoke furthest from the connecting portion has a first connecting structure, and the end of the second stator yoke furthest from the connecting portion has a second connecting structure, the second connecting structure being able to engage with the first connecting structure.

[0014] In some possible implementations, both the first connecting surface and the second connecting surface are planar.

[0015] In some possible implementations, the first connecting surface and the second connecting surface are respectively concave arc surfaces or convex arc surfaces.

[0016] In some possible implementations, the first connecting surface has a first edge, and the first stator yoke has a first wall and a second wall facing away from each other. In the direction from the main body to the connecting portion, the distance from the first edge to the first wall is less than the distance from the first edge to the second wall. The first edge is the edge of the first connecting surface away from the main body, and the first wall is the wall of the first stator yoke away from the main body.

[0017] The second connecting surface has a second edge, and the second stator yoke has a third wall and a fourth wall that are opposite to each other. In the direction from the main body to the connecting part, the distance from the second edge to the third wall is less than the distance from the second edge to the fourth wall. The second edge is the edge of the second connecting surface away from the main body, and the third wall is the wall of the second stator yoke away from the main body.

[0018] In some possible implementations, the stator teeth, the first stator yoke, and the second stator yoke are integrally formed.

[0019] In a second aspect, this disclosure provides a motor stator, the motor stator comprising the stator block described in the first aspect and its possible implementations.

[0020] Thirdly, this disclosure provides an electric motor, which includes the motor stator described in the third aspect and its possible implementations.

[0021] Fourthly, this disclosure provides an electrical device, which includes a motor stator as described in the fourth aspect and its possible implementations.

[0022] The technical solution provided in this disclosure has at least the following beneficial effects:

[0023] This disclosure provides a stator block in which a connecting portion has a first connecting surface and a second connecting surface facing away from each other. The first connecting surface is used to contact a first stator yoke, and the second connecting surface is used to contact a second stator yoke. Furthermore, the distance between the first and second connecting surfaces gradually decreases in the direction from the main body to the connecting portion. Compared to related technologies that use dovetail grooves and trapezoidal protrusions to engage and fix the stator teeth and stator yoke, this method shortens the magnetic circuit length, thereby reducing the overall magnetic reluctance of the magnetic field lines passing through the stator, reducing iron losses, improving the motor's torque and efficiency, and ultimately enhancing the motor's performance.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a stator block according to an embodiment of the present disclosure;

[0027] Figure 2 This is a schematic diagram illustrating the processing of a stator block according to an embodiment of this disclosure;

[0028] Figure 3 This is a schematic diagram illustrating the processing of a stator block according to an embodiment of this disclosure;

[0029] Figure 4 This is a schematic diagram illustrating the processing of a stator block according to an embodiment of this disclosure;

[0030] Figure 5 This is a schematic diagram of the structure of a stator block according to an embodiment of the present disclosure;

[0031] Figure 6 This is a schematic diagram of the structure of a motor stator shown in an embodiment of this disclosure;

[0032] Figure 7 This is a schematic diagram of the structure of a stator block according to an embodiment of the present disclosure;

[0033] Figure 8 This is a schematic diagram of the magnetic field line distribution inside an electric motor, as shown in an embodiment of this disclosure.

[0034] Legend

[0035] 10. Axis; 20. Receiving cavity; 30. Clearance;

[0036] 01. Stator block;

[0037] 1. Stator teeth;

[0038] 11. Main body; 12. Connecting parts;

[0039] 111. Toothed shoe structure;

[0040] 121. First connecting surface; 122. Second connecting surface;

[0041] 121a, First edge; 122a, Second edge;

[0042] 1211, First snap-fit ​​structure; 1221, Third snap-fit ​​structure;

[0043] 2. First stator yoke;

[0044] 21. Second snap-fit ​​structure; 22. First connecting structure; 2a. First wall surface; 2b. Second wall surface;

[0045] 3. Second stator yoke;

[0046] 31. Fourth snap-fit ​​structure; 32. Second connection structure; 3a. Third wall surface; 3b. Fourth wall surface;

[0047] 02. Motor rotor;

[0048] 021. Rotor core; 022. Permanent magnet. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0050] Iron loss refers to the sum of hysteresis loss, eddy current loss, and residual loss per unit mass of ferromagnetic material in alternating and pulsating magnetic fields, measured in W / kg (watts per kilogram). Transformers, generators, and motors all experience iron loss. Iron loss is one aspect of their energy loss, caused by hysteresis and eddy current effects within the iron core during operation, generating heat energy that consumes energy, hence the term "iron loss." Grain-oriented silicon steel typically refers to silicon steel sheets with a clearly directional internal grain arrangement. Non-oriented silicon steel typically refers to silicon steel sheets without a clearly directional internal grain arrangement. Compared to non-oriented silicon steel, grain-oriented silicon steel exhibits better magnetic permeability along the rolling direction; that is, its permeability is higher and its magnetic reluctance is lower along the rolling direction. Accordingly, for the stator of the motor, the stator teeth can be made of oriented silicon steel with the rolling direction in the radial direction, and the stator yoke can be made of oriented silicon steel with the rolling direction in the tangential direction (i.e., the circumferential direction). This reduces the overall magnetic reluctance of the magnetic field lines passing through the stator, reduces iron loss, improves the torque and efficiency of the motor, and improves the performance of the motor.

[0051] In related technologies, a motor stator includes multiple stator tubes, and a stator block includes stator teeth and a stator yoke. The stator teeth and yoke are typically connected by a snap-fit ​​mechanism. Specifically, the stator yoke has dovetail grooves, and the stator teeth have trapezoidal protrusions that fit the dovetail grooves. The trapezoidal protrusions are inserted into the dovetail grooves to connect the stator teeth and the stator yoke. Further, one end of the stator yoke has a dovetail groove, and the other end has a trapezoidal protrusion. Multiple stator blocks are typically connected by the fit between the dovetail grooves and the trapezoidal protrusions. However, with this structure, during motor operation, the magnetic path length of the magnetic field lines in the stator is relatively large, resulting in high overall magnetic reluctance of the stator, leading to lower motor torque and lower efficiency.

[0052] To solve the above-mentioned technical problems, this disclosure provides a stator block 01, see [link to relevant documentation]. Figure 1 The stator block 01 includes stator teeth 1, a first stator yoke 2, and a second stator yoke 3. The stator teeth 1 include a connected main body portion 11 and a connecting portion 12. The connecting portion 12 has a first connecting surface 121 and a second connecting surface 122 that are opposite to each other. The first stator yoke 2 and the second stator yoke 3 are respectively connected to the end of the connecting portion 12 away from the main body portion 11. The first stator yoke 2 is in contact with the first connecting surface 121, and the second stator yoke 3 is in contact with the second connecting surface 122.

[0053] In the direction from the main body 11 to the connecting part 12, the distance between the first connecting surface 121 and the second connecting surface 122 gradually decreases. The rolling direction of the stator tooth 1 is along the radial direction of the stator block 01. When the first stator yoke 2 is in contact with the first connecting surface 121, the rolling direction of the first stator yoke 2 is along the first tangential direction of the stator block 01. When the second stator yoke 3 is in contact with the second connecting surface 122, the rolling direction of the second stator yoke 3 is along the second tangential direction of the stator block 01, and the second tangential direction is the opposite of the first tangential direction.

[0054] Specifically, the stator tooth 1, the first stator yoke 2, and the second stator yoke 3 can be integrally formed structures, see [reference]. Figure 2 In the upper part, the stator teeth 1, the first stator yoke 2, and the second stator yoke 3 can be formed from a single piece of grain-oriented silicon steel through a cutting process into an unbent stator block 01. This unbent stator block 01 is formed by stacking several grain-oriented silicon steel sheets in a "Y" shape. In this state, the rolling direction of the stator teeth 1, the first stator yoke 2, and the second stator yoke 3 is along the radial direction of the stator block 01, i.e., the vertically upward direction shown in the figure. (See also...) Figure 2 At the bottom, the stator block 01, which was not bent, is formed by a bending process, and this stator block 01 has a "T" shaped structure. For example... Figure 2 As shown, the rolling direction of this grain-oriented silicon steel is vertically upward as indicated in the figure. In the unbent stator block 01, the grain arrangement direction of stator teeth 1, the first stator yoke 2, and the second stator yoke 3 is vertically upward. After bending, in stator block 01, the grain arrangement direction of stator teeth 1 is vertical, while the grain arrangement direction of the first stator yoke 2 and the second stator yoke 3 is horizontal. Figure 1 As shown, after the bending process, the first stator yoke 2 contacts the first connecting surface 121, and the second stator yoke 3 contacts the second connecting surface 122. In this state, the rolling direction of the first stator yoke 2 is along the first tangential direction of the stator block 01, and the rolling direction of the second stator yoke 3 is along the second tangential direction of the stator block 01, which is the opposite of the first tangential direction. Since the bending process does not affect the stator teeth 1, the stator teeth 1 still maintain their original rolling direction, that is, along the radial direction of the stator block 01. It is easy to understand that magnetic field lines inside the stator block 01 always form a closed loop along the path of least magnetic resistance, while in the stator teeth 1, the first stator yoke 2, and the second stator yoke 3, the magnetic resistance is least along their grain arrangement direction. Therefore, the magnetic field lines in the stator teeth 1 are always distributed vertically, and in the first stator yoke 2 and the second stator yoke 3, they are always distributed horizontally.

[0055] Using the technical solution provided in this embodiment, the first stator yoke 2 and the second stator yoke 3 are respectively connected to the end of the connecting portion 12 away from the main body portion 11. The first stator yoke 2 is in contact with the first connecting surface 121, and the second stator yoke 3 is in contact with the second connecting surface 122. The distance between the first connecting surface 121 and the second connecting surface 122 gradually decreases along the direction from the main body portion 11 to the connecting portion 12. See [link to relevant documentation]. Figure 7 Compared to related technologies that use dovetail grooves and trapezoidal protrusions to fix the stator teeth and stator yoke (the dotted line without arrows in the figure represents the edge of the dovetail groove), this technology can shorten the magnetic circuit length (i.e., the dotted line with arrows in the figure), thereby reducing the overall magnetic resistance of the magnetic field lines passing through the stator, reducing iron loss, improving the torque and efficiency of the motor, and thus improving the performance of the motor.

[0056] Meanwhile, by machining oriented silicon steel to form an integral stator tooth 1, a first stator yoke 2, and a second stator yoke 3, and then forming a stator block 01 by bending, the process is simpler and the processing cost is lower than the technical solution of processing the stator tooth and stator yoke in steps and then pressing them together to form the stator block in related technologies.

[0057] In some possible embodiments, the first stator yoke 2 and the second stator yoke 3 are respectively reinforcedly connected to the stator teeth 1 by a snap-fit ​​connection.

[0058] like Figure 2 As shown, in the connecting part 12, the first connecting surface 121 has a first snap-fit ​​structure 1211, and the second connecting surface 122 has a third snap-fit ​​structure 1221. Correspondingly, a second snap-fit ​​structure 21 is provided on the surface of the first stator yoke 2 that is in contact with the first connecting surface 121, and a fourth snap-fit ​​structure 31 is provided on the surface of the first stator yoke 2 that is in contact with the second connecting surface 122.

[0059] In practice, the first snap-fit ​​structure 1211 and the second snap-fit ​​structure 21 are positioned and snap-fitted to each other so that the first stator yoke 2 can fit against the first connecting surface 121, and the third snap-fit ​​structure 1221 and the fourth snap-fit ​​structure 31 are snap-fitted to allow the second stator yoke 3 to fit against the second connecting surface 122.

[0060] In one example, see Figure 2 The first snap-fit ​​structure 1211 and the third snap-fit ​​structure 1221 are both groove structures, while the second snap-fit ​​structure 21 and the fourth snap-fit ​​structure 31 are both protruding structures.

[0061] For example, the cross-sections of the first snap-fit ​​structure 1211 and the third snap-fit ​​structure 1221 are both semi-circular, as are the cross-sections of the second snap-fit ​​structure 21 and the fourth snap-fit ​​structure 31. This prevents the second snap-fit ​​structure 21 and the fourth snap-fit ​​structure 31 from deforming during assembly, thereby improving the fit between the first stator yoke 2 and the first connecting surface 121, and improving the fit between the second stator yoke 3 and the second connecting surface 122. This avoids gaps within the stator block 01, thereby reducing the overall magnetic reluctance of the magnetic field lines passing through the stator, reducing iron losses, improving the motor's torque and efficiency, and ultimately enhancing motor performance.

[0062] It is easy to understand that both the first snap-fit ​​structure 1211 and the third snap-fit ​​structure 1221 can be groove structures, and correspondingly, both the second snap-fit ​​structure 21 and the fourth snap-fit ​​structure 31 can be protruding structures. Alternatively, one of the first snap-fit ​​structure 1211 and the third snap-fit ​​structure 1221 can be a protruding structure and the other a groove structure. For example, the first snap-fit ​​structure 1211 can be a protruding structure, the second snap-fit ​​structure 21 can be a groove structure, the third snap-fit ​​structure 1221 can be a groove structure, and the fourth snap-fit ​​structure 31 can be a protruding structure, and so on. Those skilled in the art can set it according to actual needs, and this disclosure does not limit it in this way.

[0063] Optionally, see Figure 2 Both the first snap-fit ​​structure 1211 and the third snap-fit ​​structure 1221 can be through-slot structures. This reduces the machining difficulty of the first snap-fit ​​structure 1211 and the third snap-fit ​​structure 1221.

[0064] In some possible embodiments, multiple stator blocks 01 are snap-fitted together.

[0065] like Figure 1 As shown, the first end of the first stator yoke 2 is integrally formed with the connecting portion 12, and the second end of the first stator yoke 2, that is, the end of the first stator yoke 2 away from the connecting portion 12, has a first connecting structure 22. Correspondingly, the first end of the second stator yoke 3 is integrally formed with the connecting portion 12, and the second end of the first stator yoke 2, that is, the end of the second stator yoke 3 away from the connecting portion 12, has a second connecting structure 32.

[0066] The second connecting structure 32 can be engaged with the first connecting structure 22.

[0067] Specifically, the first connecting structure 22 can be a protruding structure with a semi-circular cross-section, and the second connecting structure 32 can be a groove structure with a semi-circular cross-section.

[0068] In implementation, see Figure 6The first connecting structure 22 and the second connecting structure 32 serve to position each other. Multiple stator blocks 01 are engaged with each other through the cooperation of the first connecting structure 22 and the second connecting structure 32, forming a motor stator. A receiving cavity 20 is formed between two adjacent stator blocks 01, which is used to install and accommodate the windings of the motor stator. For each stator block 01, the first connecting structure 22 of the first stator yoke 2 accommodates the second connecting structure 32 of the adjacent stator block 01. Further, see... Figure 8 Taking a surface-mounted permanent magnet motor as an example, the motor rotor 02 includes a rotor core 021 and multiple permanent magnets 022, which are circumferentially distributed on the outer wall of the rotor core 021. Magnetic field lines start from the first side of the permanent magnet 022, and sequentially pass through the gap 30 between the motor stator and the motor rotor, the stator teeth 1 of the stator block 01, the first stator yoke 2, the second stator yoke 3 of the adjacent stator block 01, the stator teeth 1 of the adjacent stator block 01, the gap 30 between the motor stator and the motor rotor, the first side of the adjacent permanent magnet 022, the second side of the adjacent permanent magnet 022, and the second side of the rotor core 021 and the permanent magnet 022 to form a closed loop.

[0069] By adopting the technical solution provided in the embodiments of this disclosure, the distance between the first connecting surface 121 and the second connecting surface 122 is gradually reduced along the direction from the main body 11 to the connecting part 12. Compared with related technologies, the magnetic circuit length of the motor stator can be shortened, thereby reducing the overall magnetic resistance of the magnetic field lines passing through the stator, reducing iron loss, improving the torque and efficiency of the motor, and achieving performance improvement of the motor.

[0070] In some possible embodiments, both the first connecting surface 121 and the second connecting surface 122 are planar.

[0071] like Figure 1 and Figure 2 As shown, the first connecting surface 121 is a plane and is connected to the first side surface of the main body 11. The second connecting surface 122 is a plane and is connected to the second side surface of the main body 11. The first connecting surface 121 and the second connecting surface 122 are arranged in a "V" shape.

[0072] The first side and the second side are two sides of the main body 11 that are arranged opposite each other in the circumferential direction.

[0073] In one example, the included angle between the first connecting surface 121 and the second connecting surface 122 is located in the range of [60°, 90°].

[0074] In one example, see Figure 1 and Figure 6 The first connecting surface 121 and the second connecting surface 122 are perpendicular to and parallel to the axis 10 of the motor stator, respectively.

[0075] In some possible embodiments, both the first connecting surface 121 and the second connecting surface 122 are curved surfaces.

[0076] See Figure 3 or Figure 4 Both the first connecting surface 121 and the second connecting surface 122 are arc surfaces, and the distance between the first connecting surface 121 and the second connecting surface 122 gradually decreases along the direction from the main body 11 to the connecting part 12.

[0077] In one example, both the first connecting surface 121 and the second connecting surface 122 are concave arc surfaces. For example... Figure 3 As shown, both the first connecting surface 121 and the second connecting surface 122 are recessed towards the main body 11. Correspondingly, the surface of the first stator yoke 2 that is in contact with the first connecting surface 121 is a convex arc surface, and the surface of the second stator yoke 3 that is in contact with the second connecting surface 122 is a convex arc surface.

[0078] In one example, both the first connecting surface 121 and the second connecting surface 122 are convex arc surfaces. For example... Figure 3 As shown, both the first connecting surface 121 and the second connecting surface 122 protrude toward the main body 11. Correspondingly, the surface of the first stator yoke 2 that is in contact with the first connecting surface 121 is a concave arc surface, and the surface of the second stator yoke 3 that is in contact with the second connecting surface 122 is a concave arc surface.

[0079] Of course, the first connecting surface 121 and the second connecting surface 122 can also be one of concave arc surfaces and the other of convex arc surfaces. For example, the first connecting surface 121 is a concave arc surface and the second connecting surface 122 is a convex arc surface, or the first connecting surface 121 is a convex arc surface and the second connecting surface 122 is a concave arc surface.

[0080] When both the first connecting surface 121 and the second connecting surface 122 are curved surfaces, the radii of curvature of the first connecting surface 121 and the second connecting surface 122 can be set by the technicians according to actual needs and simulation results, and this disclosure does not limit this.

[0081] In some possible embodiments, such as Figure 5 As shown, the first connecting surface 121 has a first edge 121a, and the first stator yoke 2 has a first wall surface 2a and a second wall surface 2b that are opposite to each other. In the direction from the main body 11 to the connecting part 12, the distance from the first edge 121a to the first wall surface 2a is less than the distance from the first edge 121a to the second wall surface 2b. The second connecting surface 122 has a second edge 122a, and the second stator yoke 3 has a third wall surface 3a and a fourth wall surface 3b that are opposite to each other. In the direction from the main body 11 to the connecting part 12, the distance from the second edge 122a to the third wall surface 3a is less than the distance from the second edge 122a to the fourth wall surface 3b.

[0082] Wherein, the first edge 121a is the edge of the first connecting surface 121 away from the main body 11, the first wall surface 2a is the wall surface of the first stator yoke 2 away from the main body 11, the second edge 122a is the edge of the second connecting surface 122 away from the main body 11, and the third wall surface 3a is the wall surface of the second stator yoke 3 away from the main body 11.

[0083] Specifically, see Figure 2 After the first stator yoke 2 and the second stator yoke 3 are bent toward the stator tooth 1, the first stator yoke 2 fits into the first connecting surface 121, and the second stator yoke 3 fits into the second connecting surface 122. (Reference) Figure 5 In stator block 01, the first stator yoke 2 and the second stator yoke 3 form a stator yoke portion, which has inner and outer wall surfaces arranged opposite each other in the radial direction. The surface of the first stator yoke 2 that contacts the first connecting surface 121 and the surface of the second stator yoke 3 that contacts the second connecting surface 122 form a V-shaped groove on the inner wall surface of the stator yoke portion. The distance from the first edge 121a to the first wall surface 2a is less than the distance from the first edge 121a to the second wall surface 2b, and the distance from the second edge 122a to the third wall surface 3a is less than the distance from the second edge 122a to the fourth wall surface 3b. This means that the distance from the bottom of the V-shaped groove to the outer wall surface is less than the distance from the bottom of the groove to the inner wall surface. This increases the contact area between the connecting portion 12 and the stator yoke portion, thus increasing the cross-sectional area of ​​the stator's magnetic circuit. According to the magnetic reluctance calculation formula: R... m = L / (m*A), where R m Let R be the total magnetic reluctance of the closed loop, L be the magnetic path length, m be the permeability of the material, A be the cross-sectional area of ​​the magnetic path, and R be the total magnetic reluctance. m It is inversely proportional to the magnetic circuit length L. Therefore, reducing the overall magnetic reluctance of the magnetic field lines passing through the stator reduces iron loss, increases the motor's torque and efficiency, and improves the motor's performance.

[0084] For example, the distance from the first edge 121a to the first wall 2a can be L1, and the distance from the first edge 121a to the second wall 2b can be L2, where L2 > 5L1. The distance from the second edge 122a to the third wall 3a can be L3, and the distance from the second edge 122a to the fourth wall 3b can be L4, where L4 > 5L3.

[0085] In some possible embodiments, refer to Figure 2 and Figure 6As shown, the end of the main body 11 away from the connecting part 12 has a toothed shoe structure 111. There can be multiple toothed shoe structures 111, for example, two, distributed on the first and second sides of the main body 11. The toothed shoe structure 111, firstly, concentrates the magnetic field distribution at the ends of the stator teeth 1, reducing local concentration and distortion of the magnetic field, thereby reducing iron loss and eddy current loss, and improving the output power and efficiency of the motor; secondly, it increases the surface area at the ends of the stator teeth 1, improving heat dissipation efficiency, reducing the temperature of the motor stator, and improving the thermal stability of the motor; and thirdly, it facilitates the installation and fixing of the windings, improving the production and assembly efficiency of the stator module.

[0086] This disclosure does not specifically limit the shape of the toothed shoe structure 111, and it can be matched and set according to factors such as the application scenario and performance requirements of the stator module. For example, the toothed shoe structure 111 can be trapezoidal or arc-shaped.

[0087] The technical solutions provided in this disclosure have at least the following beneficial effects:

[0088] This disclosure provides a stator block 01 in which a connecting portion 12 has a first connecting surface 121 and a second connecting surface 122 facing away from each other. The first connecting surface 121 is used to contact a first stator yoke 2, and the second connecting surface 122 is used to contact a second stator yoke 3. Furthermore, in the direction from the main body 11 to the connecting portion 12, the distance between the first connecting surface 121 and the second connecting surface 122 gradually decreases. Compared to related technologies that use dovetail grooves and trapezoidal protrusions to engage and fix the stator teeth and stator yoke, this method shortens the magnetic circuit length, thereby reducing the overall magnetic reluctance of the magnetic field lines passing through the stator, reducing iron loss, improving the motor's torque and efficiency, and ultimately enhancing the motor's performance.

[0089] This disclosure provides a motor stator, which includes the aforementioned plurality of stator blocks 01, see [link to previous document]. Figure 6 The first stator yoke 2 and the second stator yoke 3 of multiple stator blocks 01 are connected end to end to form a stator core. A receiving cavity 20 is formed between two adjacent stator blocks 01, which can provide space for the installation and fixing of the winding.

[0090] This disclosure provides an electric motor, which includes the aforementioned motor stator. This disclosure does not limit the type of motor; it can be selected based on parameters such as the application scenario, power requirements, and available space. For example, the motor can be a permanent magnet synchronous motor, a permanent magnet DC motor, or a permanent magnet asynchronous motor. Correspondingly, the advantages of the aforementioned stator module, including the advantages of the motor with this stator module, are also present, and will not be elaborated further here.

[0091] This disclosure provides an electrical device that may include a motor or motor stator as described in any of the above embodiments. For example, the electrical device may be a washing machine, a fan, an electric drill, an electric bicycle, etc. Accordingly, the advantages of the motor or stator module described above are also present in the electrical device including such a motor or stator module, and will not be repeated here.

[0092] Based on the same concept, this disclosure provides a method for processing a stator block 01, the method comprising:

[0093] Step 1: Stamp the raw material plate to remove waste material and obtain the connected stator teeth 1, the first stator yoke 2, and the second stator yoke 3.

[0094] The raw material plate can be a rectangular plate, and the stamping tool is adapted to the outer contour shape of the stator block 01.

[0095] In practice, the raw material plate can be placed on the processing table, and the stamping tool stamps the raw material plate from top to bottom to cut the raw material plate. After the waste material is removed, the connected stator teeth 1, the first stator yoke 2 and the second stator yoke 3 can be obtained. At this time, the first stator yoke 2 and the second stator yoke 3 are not in contact with the first connecting surface 121 and the second connecting surface 122 of the connecting part 12.

[0096] Step 2: Bend the first stator yoke 2 toward the first connecting surface 121 of the stator tooth 1 so that the first stator yoke 2 contacts the first connecting surface 121. Bend the second stator yoke 3 toward the second connecting surface 122 of the stator tooth 1 so that the second stator yoke 3 contacts the second connecting surface 122, thus obtaining stator block 01.

[0097] The first connecting surface 121 and the second connecting surface 122 are two opposing surfaces in the connecting portion 12, and the distance between the first connecting surface 121 and the second connecting surface 122 gradually decreases in the direction from the main body portion 11 to the connecting portion 12.

[0098] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this disclosure. 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 a suitable manner in any 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.

[0099] It is understood that in this disclosure, "multiple" refers to two or more, and other quantifiers are similar. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The singular forms "a," "the," and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0100] It is further understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another, and do not indicate a specific order or degree of importance. In fact, the expressions "first," "second," etc., are completely interchangeable. For example, without departing from the scope of this disclosure, first information can also be referred to as second information, and similarly, second information can also be referred to as first information.

[0101] It is further understood that the terms "center," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In this invention, unless otherwise expressly 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. Moreover, "above," "on top," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0102] It is further understood that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the two components; they can refer to a direct connection between two components without the presence of other components, or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0103] It is further understood that although operations are described in a specific order in the accompanying drawings in the embodiments of this disclosure, this should not be construed as requiring these operations to be performed in the specific order or serial order shown, or requiring all of the shown operations to be performed to obtain the desired result. In certain environments, multitasking and parallel processing may be advantageous.

[0104] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the scope of the claims.

[0105] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A stator block (01), characterized in that, The stator block (01) is made of oriented silicon steel and includes stator teeth (1), a first stator yoke (2) and a second stator yoke (3). The stator tooth (1) includes a connected main body (11) and a connecting part (12), the connecting part (12) having a first connecting surface (121) and a second connecting surface (122) facing away from each other, wherein the distance between the first connecting surface (121) and the second connecting surface (122) gradually decreases in the direction from the main body (11) to the connecting part (12); The first stator yoke (2) and the second stator yoke (3) are respectively connected to the end of the connecting part (12) away from the main body part (11). The first stator yoke (2) is in contact with the first connecting surface (121), and the second stator yoke (3) is in contact with the second connecting surface (122). The rolling direction of the stator teeth (1) is along the radial direction of the stator block (01). When the first stator yoke (2) is in contact with the first connecting surface (121), the rolling direction of the first stator yoke (2) is along the first tangential direction of the stator block (01). When the second stator yoke (3) is in contact with the second connecting surface (122), the rolling direction of the second stator yoke (3) is along the second tangential direction of the stator block (01). The second tangential direction is the opposite of the first tangential direction.

2. The stator block (01) according to claim 1, characterized in that, The first connecting surface (121) has a first snap-fit ​​structure (1211), and the first stator yoke (2) has a second snap-fit ​​structure (21), which snaps into the first snap-fit ​​structure (1211). The second connecting surface (122) has a third snap-fit ​​structure (1221), and the second stator yoke (3) has a fourth snap-fit ​​structure (31), which snaps into the third snap-fit ​​structure (1221).

3. The stator block (01) according to claim 2, characterized in that, The first snap-fit ​​structure (1211) and the third snap-fit ​​structure (1221) are both groove structures, while the second snap-fit ​​structure (21) and the fourth snap-fit ​​structure (31) are both protrusion structures.

4. The stator block (01) according to claim 1, characterized in that, The first stator yoke (2) has a first connecting structure (22) at one end away from the connecting part (12), and the second stator yoke (3) has a second connecting structure (32) at one end away from the connecting part (12). The second connecting structure (32) can be engaged with the first connecting structure (22).

5. The stator block (01) according to claim 1, characterized in that, Both the first connecting surface (121) and the second connecting surface (122) are planar.

6. The stator block (01) according to claim 1, characterized in that, The first connecting surface (121) and the second connecting surface (122) are respectively concave arc surface and convex arc surface.

7. The stator block (01) according to claim 1, characterized in that, The first connecting surface (121) has a first edge (121a), and the first stator yoke (2) has a first wall surface (2a) and a second wall surface (2b) facing away from each other. In the direction from the main body (11) to the connecting part (12), the distance from the first edge (121a) to the first wall surface (2a) is less than the distance from the first edge (121a) to the second wall surface (2b). The first edge (121a) is the edge of the first connecting surface (121) away from the main body (11), and the first wall surface (2a) is the wall surface of the first stator yoke (2) away from the main body (11). The second connecting surface (122) has a second edge (122a), and the second stator yoke (3) has a third wall surface (3a) and a fourth wall surface (3b) facing away from each other. In the direction from the main body (11) to the connecting part (12), the distance from the second edge (122a) to the third wall surface (3a) is less than the distance from the second edge (122a) to the fourth wall surface (3b). The second edge (122a) is the edge of the second connecting surface (122) away from the main body (11), and the third wall surface (3a) is the wall surface of the second stator yoke (3) away from the main body (11).

8. The stator block (01) according to claim 1, characterized in that, The stator teeth (1), the first stator yoke (2), and the second stator yoke (3) are integrally formed.

9. A motor stator, characterized in that, The motor stator includes a stator block (01) as described in any one of claims 1 to 8.

10. An electric motor, characterized in that, The motor includes the motor stator as described in claim 9.

11. An electrical appliance, characterized in that, The electrical equipment includes the motor as described in claim 10.

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