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 base, stator teeth and a stator yoke, the base is made of non-oriented silicon steel and is of an annular structure, and the base is provided with a plurality of protruding parts. The end parts, far away from the axis of the stator module, of the stator teeth are opposite to at least partial areas of the lug bosses, the stator teeth are connected with the base, the stator teeth are made of oriented silicon steel, and the rolling direction of the stator teeth is along the radial direction of the stator module; the stator yoke is located between the two adjacent protruding parts and connected with the base, the stator yoke is made of oriented silicon steel, and the rolling direction of the stator yoke is the connecting line direction of the two adjacent protruding parts. The magnetic force lines are bent in the base area made of the non-oriented silicon steel material, so that a large deflection angle between the magnetic force lines and the rolling direction of the stator teeth and the stator yoke made of the oriented silicon steel material is avoided, the iron loss of the stator module is reduced, the magnetic conductivity of the stator module is improved, and the efficiency of the motor is improved.

Description

Technical Field

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

[0002] In today's industrial sector, motors are the core driving components of industrial equipment. Grain-oriented silicon steel, as a new material, is gradually being used in motors. Grain-oriented silicon steel has better magnetic permeability in the rolling direction, lower iron loss than non-grain-oriented silicon steel, and can have a higher magnetic field strength, which can improve motor performance and increase motor power density.

[0003] In related technologies, in motor stators made of grain-oriented silicon steel, the teeth and yoke are directly connected, wherein the rolling direction of the grain-oriented silicon steel in the teeth is the radial direction of the stator, and the rolling direction of the grain-oriented silicon steel in the yoke is the circumferential direction of the stator.

[0004] The direct connection between the teeth and the yoke causes the magnetic lines of force to bend in a certain area of ​​the teeth or yoke made of oriented silicon steel. This results in poor magnetic conductivity and greater iron loss in the areas where the magnetic lines of force are bent. Summary of the Invention

[0005] This disclosure provides a stator module and a motor, which can solve the aforementioned technical problems existing in related technologies. The technical solution is as follows:

[0006] In a first aspect, a stator module is provided, the stator module comprising a base, stator teeth and a stator yoke;

[0007] The base is made of non-oriented silicon steel and has a ring structure, and the base has multiple protrusions;

[0008] The end of the stator tooth away from the axis of the stator module is opposite to at least a portion of the protrusion. The stator tooth is connected to the base. 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] The stator yoke is located between two adjacent protrusions and is connected to the base. The stator yoke is made of oriented silicon steel, and the rolling direction of the stator yoke is the direction of the line connecting the two adjacent protrusions.

[0010] Optionally, the stator tooth includes a tooth body and a tooth shoe, wherein the tooth shoe is located at the end of the tooth body near the axis of the stator module and is connected to the tooth body.

[0011] Optionally, the base also has multiple pairs of limiting plates, each limiting plate including a first sub-limiting plate and a second sub-limiting plate, the first sub-limiting plate and the second sub-limiting plate clamping and limiting the tooth body portion.

[0012] Optionally, the toothed shoe portion has a receiving groove, and the first sub-limiting plate and the second sub-limiting plate are respectively inserted into the receiving groove.

[0013] Optionally, the tooth body and the toothed shoe are integrally formed.

[0014] Optionally, the radial width of the stator yoke is less than or equal to the radial width of the base corresponding to the protrusion.

[0015] Optionally, the end of the stator yoke in the circumferential direction of the stator module is respectively fitted with the protrusion adjacent to the stator yoke.

[0016] Optionally, the axial cross section of the stator yoke perpendicular to the stator module is trapezoidal, rectangular, or arc-shaped.

[0017] Optionally, the rolling direction of the stator yoke is perpendicular to the radial direction corresponding to the center of the stator yoke.

[0018] In a second aspect, an electric motor is provided, the electric motor comprising the stator module described in any one of the first aspects.

[0019] The beneficial effects of the technical solutions provided in this disclosure include at least the following:

[0020] In this embodiment, the base is made of non-oriented silicon steel. One end of the stator teeth is opposite to the protrusions of the base. The stator teeth are made of oriented silicon steel, and the rolling direction of the stator teeth is along the radial direction of the stator module. The stator yoke is located between two adjacent protrusions. The stator yoke is made of oriented silicon steel, and the rolling direction of the stator yoke is the direction of the line connecting the two adjacent protrusions. Based on the characteristics of the magnetic field direction in the motor stator, this embodiment ensures that the magnetic field lines bend in the base region made of non-oriented silicon steel, avoiding a large angle between the magnetic field lines and the rolling direction of the oriented silicon steel stator teeth and stator yoke. This reduces the iron loss of the stator module, increases the magnetic permeability of the stator module, and improves the efficiency of the motor.

[0021] 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

[0022] 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.

[0023] Figure 1This is a schematic diagram of the structure of a stator module provided in an embodiment of this disclosure;

[0024] Figure 2 This is a partial schematic diagram of a stator module provided in an embodiment of this disclosure;

[0025] Figure 3 This is an exploded view of a stator module provided in an embodiment of this disclosure;

[0026] Figure 4 This is a schematic diagram of the magnetic field lines of an electric motor provided in an embodiment of this disclosure.

[0027] Figure label:

[0028] Base 1, protrusion 11, limiting plate 12, first sub-limiting plate 121, second sub-limiting plate 122, base body 13;

[0029] Stator tooth 2, tooth body 21, tooth shoe 22, receiving groove 221;

[0030] Stator yoke 3;

[0031] Rotor module 4, rotor body 41, magnetic element 42, first magnetic pole 42a, second magnetic pole 42b. Detailed Implementation

[0032] 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.

[0033] The following explains the terminology that may appear in the embodiments of this disclosure.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] This disclosure provides a stator module, referring to... Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a stator module provided in an embodiment of the present disclosure. The stator module may include a base 1, stator teeth 2 and stator yoke 3.

[0038] The following sections will introduce each component of the stator module:

[0039] 1. Base 1

[0040] The base 1 is made of non-oriented silicon steel. The base body 13 has a ring structure. The grains of non-oriented silicon steel have no obvious orientation and no obvious difference in magnetic permeability in various directions. This allows the magnetic field bending area between the stator teeth 2 and the stator yoke 3 made of oriented silicon steel to be located at the base 1 made of non-oriented silicon steel. This takes advantage of the isotropic nature of the base 1 made of non-oriented silicon steel and avoids a large deflection angle between the magnetic lines of force and the rolling direction of oriented silicon steel. This would prevent the iron loss and magnetic permeability of some areas of oriented silicon steel from increasing and decreasing, thus affecting the overall performance of the stator module.

[0041] The base 1 can increase the structural strength of the stator module and effectively limit the radial displacement of the stator teeth 2 under the action of electromagnetic force. At the same time, the base 1 also avoids the direct connection between the stator teeth 2 and the stator yoke 3, reducing the deformation and other adverse phenomena of the stator teeth 2 and the stator yoke 3, thereby improving the service life of the stator module.

[0042] 1.1. Protrusion 11

[0043] like Figure 3As shown, the base 1 may have multiple protrusions 11, which are connected to the base body 13. In the circumferential direction of the stator module, the protrusions 11 and stator yokes 3 are spaced apart. This disclosure does not specifically limit the shape of the protrusions 11; it can be matched and limited according to the end shapes of adjacent stator yokes 3. In the radial direction of the stator module, at least a portion of the protrusions 11 are opposite to the ends of the stator teeth 2 away from the axis of the stator module, thereby achieving that the magnetic field lines in the stator tooth 2 region are in the same direction as the rolling direction of the stator tooth 2, and the magnetic field lines in the stator yoke 3 region are in the same direction as the rolling direction of the stator yoke 3. The magnetic field lines in the protrusions 11 region are bent.

[0044] The protrusion 11 has a protrusion angle 111, and the stator yoke has a clearance angle 31. The protrusion angle 111 and the clearance angle 31 engage to restrict the displacement of the stator yoke 3 along the radial direction of the stator module and prevent the stator yoke 3 from falling out of the stator module. Other forms of engagement structures can also be used between the protrusion 11 and the stator yoke 3 to improve the connection strength between them.

[0045] 1.2. Limiting plate 12

[0046] The base 1 may also have multiple pairs of limiting plates 12, and the limiting plates 12 may include a first sub-limiting plate 121 and a second sub-limiting plate 122. This disclosure does not specifically limit the number of pairs of limiting plates 12, but can match and pre-set according to the number of stator teeth 2 in the stator module. For example, when the number of pairs of limiting plates 12 is equal to the number of stator teeth 2, each stator tooth 2 is engaged with a corresponding pair of limiting plates 12; or, for another example, when the number of pairs of limiting plates 12 is less than the number of stator teeth 2, one or more stator teeth 2 can be engaged with a corresponding pair of limiting plates 12 at intervals.

[0047] In some embodiments, such as Figure 3 As shown, the protrusion 11 and the stator tooth 2 are located on both sides of the base body 13, the protrusion 11 is connected to the base body 13, the first sub-limiting plate 121 and the second sub-limiting plate 122 are connected to the base body 13, and the space between the first sub-limiting plate 121 and the second sub-limiting plate 122 is used to accommodate the tooth body 21 of the stator tooth 2.

[0048] This disclosure does not specifically limit the connection relationship between the first sub-limiting plate 121 and the second sub-limiting plate 122 and the base body 13. 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, or integrated casting process to achieve the connection. The specific settings can be matched according to the usage scenario of the stator module and the strength requirements of the connection.

[0049] In some other embodiments, the protrusion 11 and the stator tooth 2 are located on the same side of the base body 13, the protrusion 11 is connected to the base body 13, the first sub-limiting plate 121 and the second sub-limiting plate 122 are connected to the protrusion 11, and the space between the first sub-limiting plate 121 and the second sub-limiting plate 122 is used to accommodate the tooth body 21 of the stator tooth 2.

[0050] Similarly, this disclosure does not specifically limit the connection relationship between the first sub-limiting plate 121 and the second sub-limiting plate 122 and the protrusion 11. 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, or integrated casting process to achieve the connection. The specific settings can be matched according to the usage scenario of the stator module and the strength requirements of the connection.

[0051] like Figure 3 As shown, the first sub-limiting plate 121 and the second sub-limiting plate 122 are respectively attached to the two side walls of the tooth body 21, thereby clamping and limiting the tooth body 21. The combined action of the first sub-limiting plate 121 and the second sub-limiting plate 122 can effectively limit the circumferential displacement of the stator tooth 2.

[0052] This disclosure does not specifically limit the shape and size of the first sub-limiting plate 121 and the second sub-limiting plate 122. They can be matched and set according to the extension direction, size, shape and other parameters of the two side walls of the tooth body 21 along the circumferential direction of the stator module. For example, the cross section of the tooth body 21 perpendicular to the axial direction of the stator module is rectangular, and the first sub-limiting plate 121 and the second sub-limiting plate 122 are arranged parallel to each other; as another example, the cross section of the tooth body 21 perpendicular to the axial direction of the stator module is trapezoidal, and the first sub-limiting plate 121 and the second sub-limiting plate 122 are arranged at a certain angle.

[0053] 2. Stator teeth 2

[0054] The end of the stator tooth 2 away from the axis of the stator module is opposite to at least a portion of the protrusion 11. In some embodiments, the end of the stator tooth 2 away from the axis of the stator module has the same shape and size as the end of the corresponding protrusion 11, and the end of the stator tooth 2 away from the axis of the stator module is opposite to the end of the corresponding protrusion 11.

[0055] In some other embodiments, the area of ​​the end of the stator tooth 2 away from the axis of the stator module is smaller than the area of ​​the end of the corresponding protrusion 11, and the entire end of the stator tooth 2 away from the axis of the stator module is opposite to a portion of the end of the corresponding protrusion 11.

[0056] like Figure 1As shown, stator teeth 2 are connected to the base 1. Stator teeth 2 are made of grain-oriented silicon steel, and their rolling direction is along the radial direction of the stator module. The radial direction of the stator module refers to the radial direction corresponding to the center position of stator teeth 2. Taking a rectangular stator tooth 2 at an interface perpendicular to the axial direction of the stator module as an example, the radial direction of this stator tooth 2 along the stator module is the radial direction corresponding to the center line equidistant from the two edges of the stator tooth 2 in the circumferential direction of the stator module. Therefore, the rolling direction of this stator tooth 2 is parallel to the radial direction corresponding to the center line. Other shapes of stator teeth 2 are similar to the rectangular stator teeth 2 described above, and will not be elaborated further here.

[0057] Based on the characteristics of grain-oriented silicon steel, at this time, the iron loss of stator tooth 2 along the radial direction of the stator module is small, and the magnetic permeability is good. The magnetic lines of force in the stator tooth 2 region are basically parallel to or have a small deflection angle with the rolling direction of stator tooth 2, so the overall magnetic permeability of the stator tooth 2 region is good.

[0058] Reference Figure 3 As shown, Figure 3 This is an exploded view of a stator module provided in an embodiment of this disclosure. The stator tooth 2 may include a tooth body portion 21 and a tooth shoe portion 22. The tooth body portion 21 and the tooth shoe portion 22 are integrally formed. The integrally formed stator tooth 2 reduces the gaps and seams generated by the connection between the tooth body portion 21 and the tooth shoe portion 22, improving the stability and strength of the overall structure of the stator tooth 2. At the same time, minimizing the gap between the tooth body portion 21 and the tooth shoe portion 22 can optimize the magnetic circuit of the stator tooth 2, reduce the magnetic reluctance of the stator tooth 2, and thus improve the efficiency and performance of the motor.

[0059] 2.1. Tooth body 21

[0060] In some embodiments, such as Figure 3 As shown, the protrusion 11 and the stator tooth 2 are located on both sides of the base body 13, and the tooth body 21 is connected to the base body 13. This disclosure does not specify the connection method between the tooth body 21 and the base body 13, such as: glue application, welding at the contact position, etc.

[0061] Meanwhile, the tooth body 21 can also be connected to the first sub-limiting plate 121 and the second sub-limiting plate 122 that are attached thereto, so as to further improve the connection strength between the stator tooth 2 and the base 1 and reduce the risk of the stator tooth 2 falling off the base 1. This disclosure does not specify the connection method between the tooth body 21 and the first sub-limiting plate 121 and the second sub-limiting plate 122, such as: glue application, welding at the contact position, etc.

[0062] In some other embodiments, the protrusion 11 and the stator tooth 2 are located on the same side of the base body 13, and the tooth body 21 is connected to the protrusion 11. This disclosure does not specifically limit the connection method between the tooth body 21 and the protrusion 11, such as glue application, welding at the contact position, etc.

[0063] Meanwhile, the tooth body 21 can also be connected to the first sub-limiting plate 121 and the second sub-limiting plate 122 that are attached thereto, so as to further improve the connection strength between the stator tooth 2 and the base 1 and reduce the risk of the stator tooth 2 falling off the base 1. This disclosure does not specify the connection method between the tooth body 21 and the first sub-limiting plate 121 and the second sub-limiting plate 122, such as: glue application, welding at the contact position, etc.

[0064] 2.2. Toothed Gear Section 22

[0065] like Figure 3 As shown, the toothed shoe portion 22 is located at the end of the toothed body portion 21 near the axis of the stator module and is connected to the toothed body portion 21. On one hand, the toothed shoe portion 22 helps to guide the magnetic field to concentrate at the stator teeth 2, thereby increasing 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 22 helps to reduce the magnetic reluctance between the stator teeth 2, allowing the magnetic field to pass through the stator teeth 2 more smoothly, thereby reducing the magnetic reluctance loss of the magnetic circuit and improving the magnetic permeability of the motor.

[0066] This disclosure does not specifically limit the shape of the toothed shoe portion 22, 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 22 can be trapezoidal, and the inclined surface of the trapezoidal toothed shoe portion 22 can restrict the movement of the wires wound on the tooth body portion 21, preventing the wires from falling off the tooth body portion 21; as another example, the toothed shoe portion 22 can be arc-shaped, and the arc-shaped toothed shoe portion 22 can distribute the magnetic field more evenly and improve the motor efficiency.

[0067] The toothed shoe portion 22 may have a receiving groove 221, and the first sub-limiting plate 121 and the second sub-limiting plate 122 are respectively inserted into the receiving groove 221. The insertion structure formed by the first sub-limiting plate 121, the second sub-limiting plate 122 and the receiving groove 221 can further restrict the circumferential movement and radial outward movement of the stator tooth 2, and further enhance the structural strength of the stator module.

[0068] This disclosure does not specifically limit the depth of the insertion structure, but can be matched and set according to factors such as the usage scenario of the stator module and the shape and size of the toothed shoe 22.

[0069] The bottom of the receiving groove 221 may also have a connecting substance such as glue. After the first sub-limiting plate 121 and the second sub-limiting plate 122 are inserted into the receiving groove 221, they come into contact with the glue, thereby realizing the glued connection between the first sub-limiting plate 121, the second sub-limiting plate 122 and the receiving groove 221. This can enhance the structural strength of the plug-in structure formed by the first sub-limiting plate 121, the second sub-limiting plate 122 and the receiving groove 221, and avoid the tendency of the stator teeth 2 to move circumferentially, which would cause the first sub-limiting plate 121 and the second sub-limiting plate 122 to deform or break.

[0070] 3. Stator yoke 3

[0071] like Figure 2 As shown, the stator yoke 3 is located between two adjacent protrusions 11 and is connected to the base 1. The stator yoke 3 is made of oriented silicon steel, and the rolling direction of the stator yoke 3 is the direction of the line connecting the two adjacent protrusions 11.

[0072] In some embodiments, the line connecting two adjacent protrusions 11 can be parallel to the extension direction of the stator yoke 3 at the two edges of the stator module in the radial direction. In this case, the magnetic lines of force can pass from the stator tooth 2 through the base 1 region corresponding to the protrusion 11, the stator yoke 3, the base 1 region corresponding to the adjacent protrusion 11, and then to the adjacent stator tooth 2 in sequence, thus avoiding the magnetic lines of force passing through the base body 13 corresponding to the stator yoke 3. Since the base body 13 is made of non-oriented silicon steel and has a small area, the magnetic resistance of the base body 13 is large, which affects the overall magnetic permeability of the stator module.

[0073] In some other embodiments, the line connecting two adjacent protrusions 11 may form a certain angle with the extension direction of the stator yoke 3 at the two radial edges of the stator module. Magnetic lines of force can sequentially pass from the stator tooth 2 through the base 1 region corresponding to the protrusion 11, the base body 13 corresponding to the stator yoke 3, the stator yoke 3, the base 1 region corresponding to the adjacent protrusion 11, and then to the adjacent stator tooth 2. Alternatively, magnetic lines of force can sequentially pass from the stator tooth 2 through the base 1 region corresponding to the protrusion 11, the stator yoke 3, the base body 13 corresponding to the stator yoke 3, the base 1 region corresponding to the adjacent protrusion 11, and then to the adjacent stator tooth 2. In this case, it is unavoidable that some magnetic lines of force pass through the base body 13, which has higher magnetic resistance and poorer magnetic permeability, thereby reducing the overall magnetic permeability of the stator module.

[0074] Unless otherwise specified, this disclosure will use the example of the stator yoke 3 being rolled in a direction parallel to the extension direction of the two edges of the stator yoke 3 in the radial direction of the stator module for subsequent explanation.

[0075] Reference Figure 2 As shown, Figure 2This is a partial schematic diagram of a stator module provided in an embodiment of the present disclosure, wherein the radial width L2 of the stator yoke 3 is less than or equal to the radial width L1 of the base 1 corresponding to the protrusion 11.

[0076] In some embodiments, such as Figure 3 As shown, the protrusion 11 and the stator teeth 2 are located on opposite sides of the base body 13. In this case, the radial width L2 of the stator yoke 3 is less than or equal to the radial width L1 of the base 1 corresponding to the protrusion 11, which prevents the stator yoke 3 from protruding excessively beyond the end of the protrusion 11 at the outer edge of the stator module's radial direction. This reduces damage to the stator yoke 3 from external objects and strengthens the connection between the stator yoke 3 and the base 1, preventing the stator yoke 3 from detaching from the base 1.

[0077] In some other embodiments, the protrusion 11 and the stator tooth 2 are located on the same side of the base body 13. In the radial direction of the stator module, the radial width L2 of the stator yoke 3 is less than or equal to the radial width L1 of the base 1 corresponding to the protrusion 11. This prevents a portion of the stator yoke 3 from directly contacting the tooth body 21 of the stator tooth 2, thus avoiding some magnetic lines of force directly entering the stator yoke 3 from the tooth body 21. In this case, in the area where the tooth body 21 contacts the stator yoke 3, the magnetic lines of force have a large angle with the rolling direction of the tooth body 21 or the stator yoke 3, resulting in increased iron loss and reduced magnetic permeability of the stator module.

[0078] The ends of the stator yoke 3 in the circumferential direction of the stator module are respectively fitted with the adjacent protrusions 11. When there is a gap between the end of the stator yoke 3 and the opposite protrusion 11, the air magnetic resistance at the gap is large, which is not conducive to the passage of magnetic lines of force, resulting in large iron loss and poor magnetic permeability of the stator module. When the end of the stator yoke 3 is tightly fitted with the opposite protrusion 11, the gap between the protrusion 11 and the stator yoke 3 is small, the magnetic resistance at the gap is reduced, which is conducive to the passage of magnetic lines of force, thereby achieving better magnetic permeability of the stator module.

[0079] The stator yoke 3 has a trapezoidal, rectangular, or arc-shaped cross-section perpendicular to the axial direction of the stator module. For example, if the stator yoke 3 has an arc-shaped cross-section, the outer edge of the stator module will have a circular ring structure, resulting in lower friction and making it less likely for foreign objects to accumulate. Alternatively, if the stator yoke 3 has a rectangular or trapezoidal cross-section, the manufacturing process is simpler, producing less waste and lower manufacturing costs. Furthermore, the space between the two protrusions 11 for accommodating the rectangular or trapezoidal stator yoke 3 is easier to process.

[0080] The stator yoke 3 has a rectangular or trapezoidal cross-section perpendicular to the axial direction of the stator module, and the rolling direction of the stator yoke 3 is perpendicular to the radial direction corresponding to the center of the stator yoke 3. At this time, the magnetic lines of force can pass from the stator teeth 2 sequentially through the base 1 region corresponding to the protrusion 11, the stator yoke 3, the base 1 region corresponding to the adjacent protrusion 11, and then to the adjacent stator teeth 2, thus avoiding the magnetic lines of force passing through the base body 13 corresponding to the stator yoke 3. Since the base body 13 is made of non-oriented silicon steel and has a small area, the magnetic resistance of the base body 13 is large, which affects the overall magnetic permeability of the stator module.

[0081] The cross sections of multiple stator yokes 3 in the same stator module can be the same or different. For example, some stator yokes 3 in the same stator module have a trapezoidal cross section perpendicular to the axial direction of the stator module, while other stator yokes 3 have a rectangular cross section perpendicular to the axial direction of the stator module.

[0082] 4. Stator windings

[0083] The stator module may also include stator windings (not shown in the accompanying drawings), which are made of wire. This disclosure does not specifically limit the type of stator windings, which can be matched and set according to the application scenario of the motor and factors such as the number of magnetic poles and the shape of the wire windings, such as: single-phase windings, three-phase windings, concentrated windings, distributed windings, etc.

[0084] The stator winding is wound around the outside of the tooth body 21. When the stator winding is energized, it can generate a corresponding rotating magnetic field. The rotor module 4 can generate high-speed rotation under the drive of the rotating magnetic field generated by the stator winding, thereby realizing the operation of the motor.

[0085] 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.

[0086] Reference Figure 4 As shown, Figure 4 This is a schematic diagram of the magnetic field lines of an electric motor according to an embodiment of the present disclosure. The motor may further include a rotor module 4, which includes a rotor body 41 and a magnetic element 42. The rotor body 41 can rotate along a preset axis of the motor, and the magnetic element 42 is located on the outer wall of the rotor body 41 and connected to the rotor body 41.

[0087] This disclosure does not specifically limit the material of the magnetic element 42, such as neodymium iron boron, ferrite, AlNiCo, cobalt samarium, etc.

[0088] Figure 4 This is a schematic diagram of the magnetic field lines of an electric motor provided in an embodiment of this disclosure, with reference to... Figure 4As shown, the magnetic field lines start from the first magnetic pole 42a, pass through the tooth shoe portion 22, tooth body portion 21, base 1, and stator yoke 3 of the stator tooth 2, and return to the second magnetic pole 42b and the third magnetic pole (not shown in the attached figure). The second magnetic pole 42b and the third magnetic pole are two adjacent magnetic poles of the first magnetic pole 42a, wherein the first magnetic pole 42a is the N pole, and the second magnetic pole 42b and the third magnetic pole are both the S poles.

[0089] In this embodiment, both the stator teeth 2 and the stator yoke 3 are made of grain-oriented silicon steel. The rolling direction of the stator teeth 2 is along the radial direction of the stator module, and the rolling direction of the stator yoke 3 is the direction of the line connecting two adjacent protrusions 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 the 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 the iron loss is greater.

[0090] Reference Figure 4 As shown, in the tooth shoe portion 22 and tooth body portion 21 of stator tooth 2, the magnetic lines of force are basically parallel to the rolling direction of the grain-oriented silicon steel stator tooth 2; based on the same principle, in the stator yoke 3 region, the magnetic lines of force are also basically parallel to the rolling direction of the grain-oriented silicon steel stator yoke 3; the magnetic lines of force are bent at a large angle in the base 1 region. In related technologies, the bending of the magnetic lines of force occurs in the vicinity of the connection between stator tooth 2 and stator yoke 3, resulting in a large angle between the magnetic lines of force in the bending region and the rolling direction in that region, leading to greater iron loss in that region and consequently weaker overall magnetic permeability of the stator module. Compared with related technologies, the base 1 in this embodiment is made of non-oriented silicon steel. The magnetic permeability of the base 1 is basically the same in all directions, so the magnetic lines of force are bent in the area of ​​the base 1, which makes the overall iron loss of the stator teeth 2 and stator yoke 3 areas smaller. The stator teeth 2 and stator yoke 3 made of oriented silicon steel achieve better magnetic permeability, and thus the stator module has better magnetic permeability.

[0091] 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.

[0092] The housing has a hollow cavity, within which the stator module and rotor module 4 are located and connected. In the axial direction of the motor, the lengths of the stator module and rotor module 4 are less than the length of the motor housing, and both ends of the stator module and rotor module 4 are located within the motor housing. The housing protects the stator module and rotor module 4 inside, preventing foreign objects (such as sand or water droplets) from entering their working areas and causing cracks or even breakage.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] It is further understood that the terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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 a base (1), stator teeth (2), and stator yoke (3); The base (1) is made of non-oriented silicon steel and has a ring structure. The base (1) has multiple protrusions (11). The end of the stator tooth (2) away from the axis of the stator module is opposite to at least a portion of the protrusion (11). The stator tooth (2) is connected to the base (1). The stator tooth (2) is made of oriented silicon steel, and the rolling direction of the stator tooth (2) is along the radial direction of the stator module. The stator yoke (3) is located between two adjacent protrusions (11) and is connected to the base (1). The stator yoke (3) is made of oriented silicon steel, and the rolling direction of the stator yoke (3) is the direction of the line connecting the two adjacent protrusions (11).

2. The stator module according to claim 1, characterized in that, The stator tooth (2) includes a tooth body (21) and a tooth shoe (22). The tooth shoe (22) is located at the end of the tooth body (21) near the axis of the stator module and is connected to the tooth body (21).

3. The stator module according to claim 2, characterized in that, The base (1) also has multiple pairs of limiting plates (12), each limiting plate (12) including a first sub-limiting plate (121) and a second sub-limiting plate (122), the first sub-limiting plate (121) and the second sub-limiting plate (122) clamping and limiting the tooth body (21).

4. The stator module according to claim 3, characterized in that, The toothed shoe portion (22) has a receiving groove (221), and the first sub-limiting plate (121) and the second sub-limiting plate (122) are respectively inserted into the receiving groove (221).

5. The stator module according to claim 2, characterized in that, The tooth body (21) and the toothed shoe (22) are integrally formed.

6. The stator module according to claim 1, characterized in that, The radial width L2 of the stator yoke (3) is less than or equal to the distance L1 from the top surface of the protrusion (11) to the corresponding stator tooth (2).

7. The stator module according to claim 1, characterized in that, The stator yoke (3) is attached to the protrusion (11) adjacent to the stator yoke (3) at its end in the circumferential direction of the stator module.

8. The stator module according to claim 1, characterized in that, The axial section of the stator yoke (3) perpendicular to the stator module is trapezoidal, rectangular or arc-shaped.

9. The stator module according to claim 8, characterized in that, The rolling direction of the stator yoke (3) is perpendicular to the radial direction corresponding to the center of the stator yoke (3).

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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