Stator module and motor

Abstract

The invention relates to a stator module and a motor, and belongs to the technical field of motors. The stator module comprises a plurality of stator units which are annularly distributed, each stator unit comprises stator teeth and two stator yokes, the stator teeth and the stator yokes are made of oriented silicon steel, and the rolling direction of the stator teeth is in the radial direction of the stator module; in the circumferential direction of the stator module, the two stator yokes are located on the two sides of the stator teeth respectively and connected with the stator teeth, the wall faces, away from the axis of the stator module, of the stator yokes and the wall faces, close to the axis of the stator module, of the stator yokes are both perpendicular to the rolling direction of the stator teeth, and the stator yokes are made of oriented silicon steel. The rolling direction of the stator yokes is perpendicular to the rolling direction of the stator teeth, and the stator yokes are connected with the stator yokes in the adjacent stator units. The two opposite wall faces of the stator yoke are parallel to each other and are parallel to the rolling direction of the oriented silicon steel, the stator yoke is machined on the oriented silicon steel raw material plate, the machining waste rate of the stator yoke is high, and the manufacturing cost of the stator module is high.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric machines, and in particular to a stator module and an electric machine. BACKGROUND

[0002] Electric machines are the core driving components of industrial equipment. Oriented silicon steel is gradually applied in electric machines as a new material. The oriented silicon steel has good magnetic conductivity in the rolling direction, smaller iron loss than non-oriented silicon steel, and higher magnetic field strength, which can improve the performance and power density of electric machines.

[0003] In the electric machine stator made of oriented silicon steel material, the rolling direction of the stator yoke oriented silicon steel is usually perpendicular to the rolling direction of the stator tooth connected thereto. Meanwhile, the stator yoke is an arc-shaped structure, and adjacent stator yokes are sequentially connected to form a ring-shaped structure.

[0004] Under the premise of ensuring the rolling direction of the stator yoke, the arc-shaped structure stator yoke is processed on the raw material plate. There is a large gap between adjacent stator yokes on the raw material plate. The raw material in the gap area is difficult to utilize, resulting in a high waste rate of the stator yoke processing, and further resulting in a high manufacturing cost of the electric machine stator. SUMMARY

[0005] Embodiments of the present disclosure provide a stator module and an electric machine, which can solve the above technical problems in the related art. The technical solution is as follows:

[0006] In a first aspect, a stator module is provided, which includes a plurality of stator units arranged in a ring shape.

[0007] The stator unit includes a stator tooth and two stator yokes.

[0008] The stator tooth is made of oriented silicon steel, and the rolling direction of the stator tooth is along the radial direction of the stator module.

[0009] In the circumferential direction of the stator module, the two stator yokes are respectively located on the two sides of the stator tooth and connected to the stator tooth. The wall surface of the stator yoke away from the axis of the stator module and the wall surface close to the axis of the stator module are both perpendicular to the rolling direction of the stator tooth. The stator yoke is made of oriented silicon steel, and the rolling direction of the stator yoke is perpendicular to the rolling direction of the stator tooth. The stator yoke is connected to the stator yoke in the adjacent stator unit.

[0010] Optionally, the stator tooth includes a tooth body and a protruding portion. The protruding portion is located at the end of the tooth body away from the axis of the stator module, and the protruding portion is connected to the tooth body and the two stator yokes, respectively.

[0011] Optionally, the protruding portion is an isosceles triangle or an isosceles trapezoid in the cross section perpendicular to the axial direction of the stator module.

[0012] Optionally, when the cross-section is an isosceles triangle, the two sidewalls of the protrusion corresponding to the two legs of the isosceles triangle are respectively connected to the two stator yokes;

[0013] When the cross-section is an isosceles trapezoid, the two sidewalls of the protrusion corresponding to the two legs of the isosceles trapezoid are respectively connected to the two stator yokes.

[0014] Optionally, when the cross-section is an isosceles triangle, the distance L1 from the edge of the protrusion away from the stator module axis to the stator module axis is greater than or equal to the distance L3 from the wall of the stator yoke away from the stator module axis to the stator module axis.

[0015] When the cross-section is an isosceles trapezoid, the distance L1 from the wall of the protrusion away from the axis of the stator module to the axis of the stator module is greater than or equal to the distance L3 from the wall of the stator yoke away from the axis of the stator module to the axis of the stator module.

[0016] Optionally, the distance L2 between the wall surface of the protrusion near the axis of the stator module and the axis of the stator module is less than or equal to the distance L4 between the edge of the stator yoke near the axis of the stator module and the axis of the stator module.

[0017] Optionally, when the cross-section is an isosceles triangle, the included angle at the end of the protrusion is 90°.

[0018] Optionally, the distance L3 from the wall surface of each stator yoke away from the stator module axis to the stator module axis is equal; the distance L4 from the wall surface of each stator yoke close to the stator module axis to the stator module axis is equal.

[0019] Optionally, the stator yoke includes multiple stator yoke units, each stator yoke unit having a sheet-like structure, and the multiple stator yoke units are stacked along the axial direction of the stator module and connected in sequence.

[0020] In a second aspect, an electric motor is provided, the electric motor comprising the stator module described in any one of the first aspects.

[0021] The beneficial effects of the technical solutions provided in this disclosure include at least the following:

[0022] In this embodiment, the stator unit includes stator teeth and two stator yokes. Both the stator teeth and stator yokes are made of grain-oriented silicon steel. The two stator yokes are located on both sides of the stator teeth and connected to them. The wall surface of the stator yoke away from the stator module axis and the wall surface near the stator module axis are both perpendicular to the rolling direction of the stator teeth, and the rolling direction of the stator yoke is perpendicular to the rolling direction of the stator teeth. The wall surface of the stator yoke away from the stator module axis and the wall surface near the stator module axis are parallel to each other and parallel to the rolling direction of the grain-oriented silicon steel. The stator yokes are processed on a grain-oriented silicon steel raw material plate in a linear rolling direction. There is less waste between adjacent stator yoke positions on the raw material plate, the raw material utilization rate of the stator yokes is high, and the manufacturing cost of the stator module is low.

[0023] 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

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the structure of a stator module provided in an embodiment of this disclosure;

[0026] Figure 2 This is a schematic diagram of the structure of a stator tooth provided in an embodiment of this disclosure;

[0027] Figure 3 This is a partial schematic diagram of a stator module provided in an embodiment of this disclosure;

[0028] Figure 4 This is a partial schematic diagram of another stator module provided in an embodiment of this disclosure;

[0029] Figure 5 This is a schematic diagram of the structure of a stator unit provided in an embodiment of this disclosure;

[0030] Figure 6 This is a schematic diagram of the machining position of an arc-shaped stator yoke in related technologies;

[0031] Figure 7 This is a schematic diagram of the processing position of a stator yoke monomer provided in an embodiment of this disclosure;

[0032] Figure 8 This is a schematic diagram of the magnetic field lines of an electric motor provided in an embodiment of this disclosure.

[0033] Figure label:

[0034] Stator unit 1;

[0035] Stator tooth 11, tooth body 111, protrusion 112, tooth shoe 113;

[0036] Stator yoke 12, stator yoke unit 120, arc-shaped stator yoke 12a;

[0037] Rotor module 2, rotor body 21, magnetic component 22, first magnetic pole 22a, second magnetic pole 22b. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0039] The following explains the terminology that may appear in the embodiments of this disclosure.

[0040] Grain-oriented silicon steel refers to silicon steel sheets with a clearly directional arrangement of internal grains, i.e., anisotropic. During the rolling process of grain-oriented silicon steel, a special treatment process ensures that all grains within the silicon steel sheet align in the same direction, which is the rolling direction. This arrangement significantly improves the magnetic permeability of the silicon steel sheet in the rolling direction; in other words, grain-oriented silicon steel exhibits superior high magnetic permeability and low iron loss characteristics in the rolling direction.

[0041] Non-oriented silicon steel: refers to silicon steel sheets whose internal grain arrangement does not have a clear directionality, that is, they are isotropic in all directions.

[0042] Iron loss: Iron loss refers to the sum of hysteresis loss and eddy current loss per unit mass of ferromagnetic material in alternating and pulsating magnetic fields (residual loss is negligible), and is measured in W / kg (watts per kilogram). Transformers, generators, and motors all exhibit iron loss. Iron loss is one of their energy losses, caused by eddy currents generated inside the iron core during operation. When these eddy currents pass through the iron core, they generate heat, which consumes energy, hence the term iron loss. Iron loss includes hysteresis loss, eddy current loss, and residual loss of the magnetic material.

[0043] In related technologies, the stator module has multiple arc-shaped stator yokes 12a. The wall surface of the arc-shaped stator yoke 12a near the axis of the stator module is a plane, which is perpendicular to the connected stator teeth. The wall surface of the arc-shaped stator yoke 12a away from the axis of the stator module is an arc surface. The rolling direction of the arc-shaped stator yoke 12a is perpendicular to the connected stator teeth, that is, the rolling direction of the arc-shaped stator yoke 12a is parallel to the wall surface of the arc-shaped stator yoke 12a near the axis of the stator module.

[0044] Reference Figure 6 As shown, Figure 6This is a schematic diagram of the processing position of an arc-shaped stator yoke in related technologies; the rolling direction of the grain-oriented silicon steel raw material plate is parallel to the X-axis direction, the rolling direction of the arc-shaped stator yoke 12a is parallel to the wall surface of the arc-shaped stator yoke 12a near the axis of the stator module, and the stamping position of the arc-shaped stator yoke 12a on the grain-oriented silicon steel raw material plate is as follows. Figure 6 As shown in the figure, in the X-axis direction, the ends of the stamping positions of adjacent arc-shaped stator yokes 12a form a certain angle and cannot be closely fitted. In the Y-axis direction, one side of the arc surface of the stamping position of adjacent arc-shaped stator yokes 12a is opposite to one side of the plane. To ensure a safe processing distance, the top of the arc surface is closest to the plane. This distance satisfies the minimum safe processing distance, resulting in a larger distance between other points on the arc surface and the plane. That is, in the Y-axis direction, there is a large amount of waste between adjacent arc-shaped stator yokes 12a, which leads to a higher manufacturing cost of the arc-shaped stator yokes 12a.

[0045] This disclosure provides a stator module, which may include a plurality of stator units 1 arranged in a ring. This disclosure does not specifically limit the number of stator units 1, and the number can be matched and set according to factors such as the application scenario and parameter requirements of the motor and the size of the stator module. This disclosure uses twelve stator units 1 as an example for illustration, and other cases are similar, and will not be described in detail here.

[0046] Reference Figure 1 As shown, Figure 1 This is a schematic diagram of a stator module provided in an embodiment of this disclosure; the stator unit 1 may include stator teeth 11 and two stator yokes 12. The various components of the stator unit 1 are described below:

[0047] 1. Stator teeth 11

[0048] The stator teeth 11 are made of grain-oriented silicon steel. The rolling direction of the stator teeth 11 is along the radial direction of the stator module, which corresponds to the radial direction of the center position of the stator teeth 11. Figure 2 As shown, taking a stator tooth 11 with a rectangular cross-section perpendicular to the axial direction of the stator module as an example, the radial direction of this stator tooth 11 along the stator module is the radial direction corresponding to the center line equidistant from the two edges of the stator tooth 11 in the circumferential direction of the stator module. Therefore, the rolling direction of this stator tooth 11 is parallel to the radial direction corresponding to the center line. Other shapes of stator teeth 11 are similar to the stator teeth 11 with a rectangular cross-section of the tooth body 111 described above, and will not be elaborated further here.

[0049] Reference Figure 5As shown, the stator tooth 11 may include multiple stator tooth units 110, each stator tooth unit 110 having a sheet-like structure. These multiple stator tooth units 110 are stacked along the axial direction of the stator module and connected sequentially. Each stator tooth unit 110 may have the same geometry and dimensions. Multiple stator tooth units 110 within a single stator tooth 11 may be formed using the same processing mold or stamping process, which simplifies the processing technology of the stator tooth 11 and reduces its processing cost.

[0050] Based on the same principle, the stator teeth 11 in multiple stator units 1 of the same stator module can also be stacked along the axial direction of the stator module by stator tooth units 110 with the same geometry and size, which helps to simplify the processing technology of the stator module and reduce the processing cost of the stator unit 1.

[0051] Based on the same principle, the stator teeth 11 in the stator modules of different motors can also be stacked along the axial direction of the stator module by stator tooth units 110 with the same geometry and size, which helps to simplify the motor processing technology and reduce the motor processing cost.

[0052] Reference Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a stator tooth provided in an embodiment of the present disclosure. The stator tooth 11 may include a tooth body portion 111 and a protrusion portion 112.

[0053] 1.1. Tooth body 111

[0054] The outer wall of the tooth body 111 of the stator tooth 11 is used for winding the coil. This disclosure does not specifically limit the dimensions of the tooth body 111; they can be matched and set according to factors such as the required winding space for the coil and the overall dimensions of the stator module. This disclosure also does not specifically limit the shape of the tooth body 111; it can be matched and set according to factors such as magnetic circuit optimization design and processing costs. For example, the cross-section of the tooth body 111 perpendicular to the axial direction of the stator module can be rectangular, trapezoidal, triangular, etc.

[0055] 1.2. Protrusion 112

[0056] The protrusion 112 is located at the end of the tooth body 111 away from the axis of the stator module, and the protrusion 112 is connected to the tooth body 111 and the two stator yokes 12. The protrusion 112 and the tooth body 111 can be integrally molded. The integral molding of the protrusion 112 and the tooth body 111 reduces the gaps and seams generated by the connection between the protrusion 112 and the tooth body 111, and improves the stability and strength of the overall structure of the protrusion 112 and the tooth body 111. At the same time, the minimum gap between the protrusion 112 and the tooth body 111 can reduce the magnetic resistance at the connection, thereby improving the efficiency and performance of the stator module.

[0057] This disclosure does not specifically limit the connection method between the protrusion 112 and the two stator yokes 12, such as glue application, welding, etc. Unless otherwise specified, the embodiments of this disclosure are described with the protrusion 112 and the two stator yokes 12 in close contact and welded at the contact seam.

[0058] The protrusion 112 has an isosceles triangle or isosceles trapezoid in cross section perpendicular to the axial direction of the stator module.

[0059] 1.2.1. The cross-section is an isosceles triangle.

[0060] When the cross-section is an isosceles triangle, refer to Figure 3 As shown, Figure 3 This is a partial schematic diagram of a stator module provided in an embodiment of this disclosure. The protrusion 112 and the two sidewalls corresponding to the two legs of the isosceles triangle are respectively connected to the two stator yokes 12. Since the angles between the two legs of the isosceles triangle and the base are equal, the angles between the sidewalls of the two stator yokes 12 that fit with the protrusion 112 and the two sidewalls of the stator yoke 12 in the radial direction of the stator module are also equal. This is beneficial for the batch processing of the stator yokes 12, thereby reducing the processing complexity of the stator module.

[0061] When the cross-section is an isosceles triangle, the distance L1 from the edge of the protrusion 112 away from the stator module axis to the stator module axis is greater than or equal to the distance L3 from the wall of the stator yoke 12 away from the stator module axis to the stator module axis.

[0062] In some embodiments, when the distance L1 from the edge of the protrusion 112 away from the stator module axis to the stator module axis is equal to the distance L3 from the wall surface of the stator yoke 12 away from the stator module axis to the stator module axis, the walls surface of the two stator yokes 12 away from the stator module axis are flush with the edge of the protrusion 112 away from the stator module axis, that is, the wall surface of the stator unit 1 away from the stator module axis is a plane.

[0063] The wall surface of stator unit 1, which is away from the axis of the stator module, is flush with the surface. On the one hand, this can reduce the noise and vibration generated during motor operation. Irregular or uneven outer edges can cause unstable airflow, resulting in additional noise and vibration, while flat outer edges can reduce this instability. On the other hand, it helps to improve the heat dissipation effect of the stator module. Heat can be evenly conducted to the surrounding air, thereby reducing the temperature during motor operation.

[0064] In some embodiments, when the distance L1 from the edge of the protrusion 112 away from the stator module axis to the stator module axis is greater than the distance L3 from the wall surface of the stator yoke 12 away from the stator module axis to the stator module axis, the protrusion 112 protrudes from the wall surface of the stator yoke 12 away from the stator module axis. In the circumferential direction of the stator module, the protrusion 112 separates the two stator yokes 12, preventing parts of the two stator yokes 12 from directly contacting each other, reducing the degree of magnetic field disorder in the contact area of ​​the two stator yokes 12 caused by mutual influence between the two stator yokes 12, and improving the magnetic permeability of the stator module.

[0065] In some embodiments, the distance L2 between the wall surface of the protrusion 112 near the stator module axis (i.e., the base of the isosceles triangle) and the stator module axis is less than or equal to the distance L4 between the edge of the stator yoke 12 near the stator module axis and the stator module axis. This avoids direct contact between the stator yoke 12 and the tooth body 111. If the stator yoke 12 and the tooth body 111 are directly in contact, some magnetic lines of force will directly enter the stator yoke 12 from the tooth body 111, causing the magnetic lines of force to bend in the contact area. This results in a large angle between the magnetic lines of force in the contact area and the rolling direction of the grain-oriented silicon steel, leading to greater iron loss in the contact area and a reduction in the magnetic permeability of the stator module.

[0066] In some embodiments, when the cross-section is an isosceles triangle, the included angle at the end of the protrusion 112 is 90°, and the distance L1 from the edge of the protrusion 112 away from the stator module axis to the stator module axis is equal to the distance L3 from the wall of the stator yoke 12 away from the stator module axis. In this case, the ratio of the width of the tooth body 111 (i.e., the extension length of the tooth body 111 perpendicular to the radial direction of the stator module) to the width of its adjacent stator yoke 12 (i.e., the extension length of the stator yoke 12 along the radial direction of the stator module) is 2:1. The magnetic field lines in the tooth body 111 region can be evenly distributed to the two adjacent stator yokes 12 via the protrusion 112, thereby ensuring a uniform distribution of magnetic field lines in the stator unit. Uniformly distributed magnetic field lines have higher stability and help reduce the overall energy consumption of the stator module, improving the motor's operating efficiency.

[0067] 1.2.2. The cross-section is an isosceles trapezoid.

[0068] When the cross-section is an isosceles trapezoid, refer to Figure 4 As shown, Figure 4This is a partial schematic diagram of another stator module provided in this embodiment. The protrusion 112 and the two sidewalls corresponding to the two legs of the isosceles trapezoid are respectively connected to the two stator yokes 12. Since the angles between the two legs of the isosceles trapezoid and the upper and lower bases are equal, the angles between the sidewalls of the two stator yokes 12 that fit with the protrusion 112 and the two sidewalls of the stator yoke 12 in the radial direction of the stator module are also equal. This is beneficial for the batch processing of the stator yokes 12, thereby reducing the processing complexity of the stator module.

[0069] The present disclosure does not specifically limit the angles between the two sides of the protrusion 112 of the isosceles trapezoidal cross section and the upper and lower bases, but can match and set them according to the dimensional parameters such as the width of the tooth body 111 corresponding to the protrusion 112 and the width of the adjacent stator yoke 12.

[0070] When the cross-section is an isosceles trapezoid, the distance L1 from the wall surface of the protrusion 112 away from the stator module axis to the stator module axis is greater than or equal to the distance L3 from the wall surface of the stator yoke 12 away from the stator module axis to the stator module axis.

[0071] In some embodiments, when the distance L1 from the wall surface of the protrusion 112 away from the stator module axis to the stator module axis is equal to the distance L3 from the wall surface of the stator yoke 12 away from the stator module axis to the stator module axis, the walls surface of the two stator yokes 12 away from the stator module axis are flush with the wall surface of the protrusion 112 away from the stator module axis, that is, the wall surface of the stator unit 1 away from the stator module axis is a plane.

[0072] The wall surface of stator unit 1, which is away from the axis of the stator module, is flush with the surface. On the one hand, this can reduce the noise and vibration generated during motor operation. Irregular or uneven outer edges can cause unstable airflow, resulting in additional noise and vibration, while flat outer edges can reduce the instability of airflow. On the other hand, it helps to improve the heat dissipation effect of the stator module. Heat can be evenly conducted to the surrounding air, thereby reducing the temperature during motor operation.

[0073] In some embodiments, when the distance L1 from the wall surface of the protrusion 112 away from the stator module axis to the stator module axis is greater than the distance L3 from the wall surface of the stator yoke 12 away from the stator module axis to the stator module axis, the protrusion 112 protrudes beyond the wall surface of the stator yoke 12 away from the stator module axis. In the circumferential direction of the stator module, the protrusion 112 separates the two stator yokes 12, preventing parts of the two stator yokes 12 from directly contacting each other, reducing the interference between the two stator yokes 12 and causing disordered magnetic lines in the contact area, thereby improving the magnetic permeability of the stator module.

[0074] In some embodiments, the distance L2 between the wall surface of the protrusion 112 near the stator module axis (i.e., the upper or lower base of the isosceles trapezoid) and the stator module axis is less than or equal to the distance L4 between the edge of the stator yoke 12 near the stator module axis and the stator module axis. In this case, direct contact between the stator yoke 12 and the tooth body 111 can be avoided. If the stator yoke 12 and the tooth body 111 are directly in contact, some magnetic lines of force will directly enter the stator yoke 12 from the tooth body 111, causing the magnetic lines of force to bend in the contact area. This results in a large angle between the magnetic lines of force in the contact area and the rolling direction of the grain-oriented silicon steel, leading to greater iron loss in the contact area and a reduction in the magnetic permeability of the stator module.

[0075] 1.3. Toothed part 113

[0076] Reference Figure 2 As shown, the toothed shoe portion 113 is located at the end of the toothed body portion 111 near the axis of the stator module and is connected to the toothed body portion 111. On the one hand, the toothed shoe portion 113 helps to guide the magnetic field to concentrate at the stator teeth 11, thereby enhancing the magnetic field density, which is beneficial to improving the magnetic field strength of the motor and increasing the output power and efficiency of the motor. On the other hand, the toothed shoe portion 113 helps to reduce the magnetic reluctance between the stator teeth 11, allowing the magnetic field to pass through the stator teeth 11 more smoothly, thereby reducing the magnetic reluctance loss of the magnetic circuit and improving the magnetic permeability of the motor.

[0077] This disclosure does not specifically limit the shape of the toothed shoe portion 113, 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 portion 113 can be trapezoidal, and the inclined surface of the trapezoidal toothed shoe portion 113 can restrict the movement of the wires wound on the tooth body portion 111, preventing the wires from falling off the tooth body portion 111; as another example, the toothed shoe portion 113 can be arc-shaped, and the arc-shaped toothed shoe portion 113 can distribute the magnetic field more evenly and improve the motor efficiency.

[0078] The tooth body 111 and the tooth shoe 113 can be integrally formed. The integrally formed stator tooth 11 reduces the gaps and seams caused by the connection between the tooth body 111 and the tooth shoe 113, and improves the stability and strength of the overall structure of the stator tooth 11. At the same time, the minimized gap between the tooth body 111 and the tooth shoe 113 can optimize the magnetic circuit of the stator tooth 11, reduce the magnetic reluctance of the stator tooth 11, and thus improve the efficiency and performance of the motor.

[0079] 2. Stator yoke 12

[0080] Reference Figure 1As shown, in the circumferential direction of the stator module, two stator yokes 12 are located on both sides of the stator teeth 11 and connected to the stator teeth 11. The wall surface of the stator yoke 12 away from the axis of the stator module and the wall surface close to the axis of the stator module are both perpendicular to the rolling direction of the stator teeth 11. The stator yoke 12 is made of grain-oriented silicon steel, and the rolling direction of the stator yoke 12 is perpendicular to the rolling direction of the stator teeth 11.

[0081] The wall surface of stator yoke 12 away from the stator module axis and the wall surface near the stator module axis are parallel to each other, and both walls are also parallel to the rolling direction of the grain-oriented silicon steel, such as... Figure 7 As shown, Figure 7 This is a schematic diagram of the processing position of a stator yoke unit according to an embodiment of this disclosure. The rolling direction of the grain-oriented silicon steel raw material plate is parallel to the X-axis direction. Since the wall surface of the stator yoke unit 120 away from the stator module axis and the wall surface near the stator module axis are parallel to the rolling direction of the grain-oriented silicon steel, the stamping position of the stator yoke unit 120 on the grain-oriented silicon steel raw material plate is as follows: Figure 7 As shown in the figure, in the X-axis direction, the ends of the stamping positions of adjacent stator yoke units 120 are parallel to each other and can be placed close together; in the Y-axis direction, the stamping positions of adjacent stator yoke units 120 are two planes facing each other, and the distance between the two planes meets the minimum safe processing distance. That is, in the Y-axis direction, there is less waste between adjacent stator yoke units 120, and thus the manufacturing cost of the stator yoke 12 in this embodiment of the present disclosure is lower.

[0082] The stator yoke 12 is connected to the stator yoke 12 in the adjacent stator unit 1. This disclosure does not specify the connection method between the stator yokes 12 in the adjacent stator unit 1. It can adopt detachable connection methods such as threaded fastening connection and snap-fit ​​connection, or non-detachable connection methods such as glue application and welding. The specific connection method can be matched and set according to the usage scenario of the stator module and the structural strength requirements of different motors for the stator module.

[0083] In some embodiments, the distance L3 from the wall surface of each stator yoke 12 away from the stator module axis is equal. The outer edges formed by the walls of the multiple stator yokes 12 away from the stator module axis are substantially flush, which can reduce the noise and vibration generated during motor operation. Irregular or uneven outer edges can cause unstable airflow, thereby generating additional noise and vibration, while the flush outer edges of the stator module can reduce the instability of airflow.

[0084] In some embodiments, the distance L4 from the wall surface of each stator yoke 12 near the stator module axis to the stator module axis is equal. In this case, it can be ensured that the tooth body portion 111 of adjacent stator teeth 11 forms the same accommodating space, which facilitates the wires to be uniformly wound on the outer wall of the tooth body portion 111 to form a stator winding.

[0085] The stator yoke 12 may include multiple stator yoke units 120, as shown in the reference. Figure 5 As shown, Figure 5 This is a schematic diagram of the structure of a stator unit provided in an embodiment of this disclosure. The stator yoke unit 120 has a sheet-like structure, and multiple stator yoke units 120 are stacked along the axial direction of the stator module and connected in sequence. Each stator yoke unit 120 can have the same geometry and size. Multiple stator yoke units 120 in a stator yoke 12 can be formed using the same processing mold or stamping, which helps to simplify the processing technology of the stator yoke 12 and reduce the processing cost of the stator yoke 12.

[0086] Based on the same principle, the stator yoke 12 in multiple stator units 1 of the same stator module can also be stacked along the axial direction of the stator module by stator yoke units 120 with the same geometry and size, which helps to simplify the processing technology of the stator module and reduce the processing cost of stator unit 1.

[0087] Based on the same principle, the stator yoke 12 in the stator module of different motors can also be made by stacking stator yoke units 120 with the same geometry and size along the axial direction of the stator module, which helps to simplify the motor processing technology and reduce the motor processing cost.

[0088] Based on the same concept, this disclosure also provides an electric motor, which may include a stator module as described in any of the above embodiments.

[0089] Reference Figure 8 As shown, the motor may also include a rotor module 2, which includes a rotor body 21 and a magnetic component 22. The rotor body 21 can rotate along a preset shaft of the motor. The magnetic component 22 is located on the outer wall of the rotor body 21 and is connected to the rotor body 21. This disclosure does not specifically limit the material of the magnetic component 22, such as neodymium iron boron, ferrite, AlNiCo, cobalt samarium, etc.

[0090] Reference Figure 8 As shown, Figure 8 This is a schematic diagram of the magnetic field lines of an electric motor according to an embodiment of the present disclosure. The magnetic field lines start from the first magnetic pole 22a, pass through the tooth shoe portion 113, tooth body portion 111, protrusion portion 112, and stator yoke 12 of the stator tooth 11, and return to the second magnetic pole 22b. The second magnetic pole 22b and the first magnetic pole 22a are two adjacent magnetic poles, wherein the first magnetic pole 22a is the N pole and the second magnetic pole 22b is the S pole.

[0091] In this embodiment, both the stator teeth 11 and the stator yoke 12 are made of grain-oriented silicon steel. The rolling direction of the stator teeth 11 is along the radial direction of the stator module, and the rolling direction of the stator yoke 12 is perpendicular to the rolling direction of the connected stator teeth 11. It should be noted that when the magnetic field direction is consistent with the rolling direction of the grain-oriented silicon steel, the grain-oriented silicon steel has a higher permeability, better magnetic conductivity, and lower iron loss. When the angle between the magnetic field direction and the rolling direction of the grain-oriented silicon steel gradually increases, the permeability of the grain-oriented silicon steel gradually decreases, the corresponding magnetic conductivity deteriorates, and iron loss increases. When the angle between the magnetic field direction and the rolling direction of the grain-oriented silicon steel increases to 90°, the permeability of the grain-oriented silicon steel is lower, the magnetic conductivity is worse, and iron loss is higher.

[0092] In the tooth body 111 and protrusion 112 regions of stator teeth 11, the magnetic lines of force are basically parallel to the rolling direction of the stator teeth 11 made of grain-oriented silicon steel. Based on the same principle, in the stator yoke 12 region, the magnetic lines of force are also basically parallel to the rolling direction of the stator yoke 12 made of grain-oriented silicon steel. This avoids a large skew angle between the magnetic lines of force and the rolling direction of the grain-oriented silicon steel, which is beneficial to improving the magnetic conductivity of the stator module and increasing the working efficiency of the motor.

[0093] In some embodiments, the motor may further include a housing (not shown) that may be fitted over the stator module and extend axially along the stator module.

[0094] The housing has a hollow cavity, within which both the stator module and rotor module 2 are located and connected. In the axial direction of the motor, the lengths of the stator module and rotor module 2 are less than the length of the motor housing, and both opposite ends of the stator module and rotor module 2 are located within the motor housing. The housing protects the stator module and rotor module 2 within it, preventing foreign objects (such as sand or water droplets) from entering the working area of ​​the stator module and rotor module 2, thus avoiding cracks or even breakage.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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 module, characterized in that, The stator module includes multiple stator units (1) arranged in a ring; The stator unit (1) includes stator teeth (11) and two stator yokes (12); The stator teeth (11) are made of oriented silicon steel, and the rolling direction of the stator teeth (11) is along the radial direction of the stator module; In the circumferential direction of the stator module, two stator yokes (12) are located on both sides of the stator teeth (11) and connected to the stator teeth (11). The wall surface of the stator yoke (12) away from the axis of the stator module and the wall surface near the axis of the stator module are both perpendicular to the rolling direction of the stator teeth (11). The stator yoke (12) is made of oriented silicon steel. The rolling direction of the stator yoke (12) is perpendicular to the rolling direction of the stator teeth (11). The stator yoke (12) is connected to the stator yoke (12) in the adjacent stator unit (1).

2. The stator module according to claim 1, characterized in that, The stator tooth (11) includes a tooth body (111) and a protrusion (112). The protrusion (112) is located at the end of the tooth body (111) away from the axis of the stator module. The protrusion (112) is connected to the tooth body (111) and the two stator yokes (12) respectively.

3. The stator module according to claim 2, characterized in that, The protrusion (112) has an isosceles triangle or isosceles trapezoid in cross section perpendicular to the axial direction of the stator module.

4. The stator module according to claim 3, characterized in that, When the cross section is an isosceles triangle, the two side walls of the protrusion (112) corresponding to the two legs of the isosceles triangle are respectively connected to the two stator yokes (12); When the cross-section is an isosceles trapezoid, the protrusion (112) and the two sidewalls corresponding to the two sides of the isosceles trapezoid are respectively connected to the two stator yokes (12).

5. The stator module according to claim 4, characterized in that, When the cross section is an isosceles triangle, the distance L1 from the edge of the protrusion (112) away from the axis of the stator module to the axis of the stator module is greater than or equal to the distance L3 from the wall of the stator yoke (12) away from the axis of the stator module to the axis of the stator module. When the cross-section is an isosceles trapezoid, the distance L1 from the wall surface of the protrusion (112) away from the axis of the stator module to the axis of the stator module is greater than or equal to the distance L3 from the wall surface of the stator yoke (12) away from the axis of the stator module to the axis of the stator module.

6. The stator module according to claim 4, characterized in that, The distance L2 between the wall surface of the protrusion (112) near the axis of the stator module and the axis of the stator module is less than or equal to the distance L4 between the edge of the stator yoke (12) near the axis of the stator module and the axis of the stator module.

7. The stator module according to claim 3, characterized in that, When the cross-section is an isosceles triangle, the included angle at the end of the protrusion (112) is 90°.

8. The stator module according to claim 1, characterized in that, The distance L3 from the wall surface of each stator yoke (12) away from the axis of the stator module is equal; The distance L4 from the wall of each stator yoke (12) near the axis of the stator module to the axis of the stator module is equal.

9. The stator module according to claim 1, characterized in that, The stator yoke (12) includes a plurality of stator yoke units (120), each stator yoke unit (120) having a sheet-like structure. The plurality of stator yoke units (120) are stacked along the axial direction of the stator module and connected in sequence.

10. An electric motor, characterized in that, The motor includes a stator module as described in any one of claims 1-9.

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