Electric machines and electric appliances

Abstract

The application provides a motor and an electrical appliance, wherein the motor comprises: a stator assembly, the stator assembly comprising: a stator yoke part; a stator tooth, one end of the stator tooth being connected with the stator yoke part; a winding, the winding being wound on the stator tooth; a rotor assembly, the rotor assembly comprising: a plurality of rotor cores, the plurality of rotor cores being arranged at intervals along the circumferential direction of the stator assembly; and a plurality of permanent magnets, the permanent magnets being arranged between two adjacent rotor cores; along the axial direction of the stator assembly, the length of the stator tooth is L1, the length of the stator yoke part is L2, the length of the rotor core is L3, and the length of the permanent magnet is L4, wherein L1 < L2, 1 < L2 / L1 < L4 / L3.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a motor and an electrical device. Background Technology

[0002] In related technologies, the windings of the motor stator generate a magnetic field after being energized. During the operation of the motor, the magnetic field generated by the windings will experience leakage, which will affect the performance and operating efficiency of the motor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] Therefore, the first aspect of the present invention provides an electric motor.

[0005] A second aspect of the present invention provides an electrical device.

[0006] The first aspect of the present invention provides an electric motor, comprising: a stator assembly, the stator assembly including: a stator yoke; stator teeth, one end of which is connected to the stator yoke; a winding wound on the stator teeth; and a rotor assembly including: a plurality of rotor cores, the plurality of rotor cores being arranged at intervals along the circumference of the stator assembly; and a plurality of permanent magnets, the permanent magnets being disposed between two adjacent rotor cores; along the axial direction of the stator assembly, the length of the stator teeth is L1, the length of the stator yoke is L2, the length of the rotor cores is L3, and the length of the permanent magnets is L4, wherein L1 < L2, and 1 < L2 / L1 < L4 / L3.

[0007] The stator assembly provided by the present invention includes a stator yoke and stator teeth, wherein one end of the stator teeth is connected to the stator yoke, and the other end of the stator teeth extends away from the stator yoke. Specifically, the stator yoke can be an annular structure, with multiple stator teeth arranged at intervals along the circumference of the annular stator yoke, and the multiple stator teeth extending toward the interior of the annular stator yoke.

[0008] Furthermore, the stator assembly also includes windings wound around stator teeth. These windings, when energized, engage with the magnetic field of the rotor permanent magnets in the rotor assembly, thereby enabling the rotor assembly to rotate. Specifically, the number of windings is the same as the number of stator teeth, and multiple windings are arranged in a one-to-one correspondence with multiple stator teeth; that is, each stator tooth is wound with a winding. This ensures that the windings of the stator assembly and the permanent magnets of the rotor assembly can effectively engage, guaranteeing the motor's operating efficiency.

[0009] Furthermore, along the axial direction of the stator assembly, the length of the stator teeth is L1, the length of the stator yoke is L2, the length of the rotor core is L3, and the length of the permanent magnet is L4, where L1 < L2. This means the length of the stator yoke is set greater than the length of the stator teeth. In other words, in the axial direction of the stator assembly, the end of the stator yoke can protrude beyond the end of the stator teeth. Thus, when the winding is wound on the stator, a portion of the winding end can coincide with the stator yoke, specifically, a portion of the winding end coincides with the stator yoke protruding beyond the stator teeth. By utilizing the portion of the stator yoke protruding beyond the stator teeth and coinciding with the winding, the leakage flux at the winding end can be utilized by the end of the stator yoke, thereby improving the operating efficiency of the motor. Specifically, along the axial direction of the stator assembly, the length of the stator teeth is L1, and the length of the stator yoke is L2, where L1 < L2.

[0010] In addition, when the stator teeth are wound with windings, the part of the stator yoke that protrudes from the stator teeth can fit in close contact with the windings. In this way, the part of the stator yoke that protrudes from the stator teeth can also be used to dissipate heat from the ends of the windings, thereby improving the heat dissipation effect of the windings during motor operation, and further improving the operating stability and efficiency of the motor.

[0011] Specifically, along the axial direction of the stator assembly, the length of the stator yoke is greater than the length of the stator teeth. One end of the stator yoke can be flush with the other end of the stator teeth, while the other end of the stator yoke protrudes beyond the other end of the stator teeth. Alternatively, both ends of the stator yoke can be set to protrude beyond the ends of the stator teeth, thereby utilizing the leakage flux at the winding ends through the portion of the stator yoke protruding beyond the stator teeth and improving motor efficiency.

[0012] Furthermore, along the axial direction of the stator assembly, the length of the stator teeth is L1, the length of the stator yoke is L2, the length of the rotor core is L3, and the length of the permanent magnet is L4, satisfying 1 < L2 / L1 < L4 / L3. Here, 1 < L2 / L1 means the length of the stator yoke is greater than the length of the stator teeth, allowing the portion of the stator yoke protruding from the stator teeth to utilize the leakage flux of the windings, thus improving motor efficiency. Furthermore, L2 / L1 < L4 / L3 means the length of the permanent magnet is greater than the length of the rotor core, meaning the permanent magnet protrudes from the rotor core, ensuring the magnetic strength of the permanent magnet and thus guaranteeing the motor's operating performance.

[0013] The stator assembly provided by this invention includes setting the length of the stator yoke portion in the axial direction of the stator assembly to be greater than the length of the stator teeth. This allows the end of the stator yoke portion to protrude beyond the end of the stator teeth in the circumferential direction of the stator assembly. When a winding is wound on the stator teeth, a portion of the end of the winding can coincide with the portion of the stator yoke portion protruding from the stator teeth in the axial direction of the stator assembly. On one hand, this allows the portion of the stator yoke portion protruding from the stator teeth to fully utilize the leakage magnetic flux at the winding end, that is, to utilize the leakage magnetic flux generated at the winding end through the protruding portion of the stator yoke. Combined with the permanent magnets of the rotor assembly of the motor, this reduces the magnetic force loss generated by the winding during motor operation, thereby improving the motor's operating efficiency. On the other hand, the portion of the stator yoke protruding from the stator teeth, in contact with the winding, can also achieve heat dissipation at the end of the winding, improving the heat dissipation effect of the winding. At the same time, L2 / L1 < L4 / L3, which means that the length of the permanent magnet is greater than the length of the rotor core. This means that the permanent magnet protrudes from the rotor core, ensuring the magnetic strength of the permanent magnet and thus ensuring the motor's operating performance.

[0014] In addition, the motor in the above-described technical solution provided by the present invention may also have the following additional technical features:

[0015] In the above technical solution, further, in the axial direction of the stator assembly, the length of the winding is greater than or equal to the length of the stator yoke.

[0016] In this technical solution, in the axial direction of the stator assembly, the length of the winding can be greater than the length of the stator yoke, that is, the end of the winding can protrude beyond the stator yoke. Alternatively, the length of the winding is equal to the length of the stator yoke, that is, the end of the winding is flush with the end of the stator yoke.

[0017] Specifically, along the axial direction of the stator assembly, when the length of the winding is greater than the length of the stator yoke (i.e., the end of the winding protrudes beyond the end of the stator yoke), the number of turns of the winding can be guaranteed, thereby ensuring the electromagnetic induction intensity generated by the winding during motor operation. This, in turn, ensures the effective engagement with the permanent magnets in the rotor assembly, thus guaranteeing the motor's operational performance. Simultaneously, the portion of the stator yoke protruding beyond the stator teeth utilizes the leakage flux generated at the winding ends, improving motor operating efficiency and simultaneously dissipating heat from the winding ends, enhancing the winding's heat dissipation effect.

[0018] Alternatively, along the axial direction of the stator assembly, when the length of the winding is equal to the length of the stator yoke (i.e., the ends of the winding and the stator yoke are flush), the ends of the winding will not protrude from the stator yoke. This reduces leakage flux at the winding ends, thereby further improving the utilization rate of the leakage flux at the winding ends by the portion of the stator yoke protruding from the stator teeth, and thus further improving the motor's operating efficiency. Simultaneously, by utilizing the leakage flux generated at the winding ends through the portion of the stator yoke protruding from the stator teeth, the motor's operating efficiency is improved, and heat dissipation at the winding ends is also enhanced, improving the winding's heat dissipation effect.

[0019] In any of the above technical solutions, the stator yoke further includes a plurality of stator yoke plates, which are stacked together.

[0020] In this technical solution, the stator yoke can be formed by stacking multiple stator yoke plates, that is, by stacking multiple stator yoke plates in the axial direction of the stator assembly to form the stator yoke. Correspondingly, the stator teeth can also be formed by stacking multiple stator tooth plates.

[0021] Specifically, the stator yoke laminations and stator teeth laminations can be integrally formed, thus creating multiple stator teeth within the stator yoke while stacking the stator yoke laminations to form the stator yoke portion. It is understood that, in the axial direction of the stator assembly, the length of the stator yoke portion is greater than the length of the stator teeth. Therefore, stator teeth laminations may not be provided on the stator yoke laminations located at the ends of the stator yoke portion, allowing the ends of the stator yoke portion to protrude beyond the ends of the stator teeth, thereby achieving the effect of utilizing the leakage magnetic flux at the winding ends through the protruding portion of the stator yoke portion.

[0022] In any of the above technical solutions, two adjacent stator yokes are further riveted together, and circular rivet points are formed on the two adjacent stator yokes; in the radial direction of the stator assembly, the width of the stator yoke is W, and the radius of the circular rivet point is d1, where W≥3d1.

[0023] In this technical solution, adjacent stator yokes can be connected to each other by riveting to achieve a stacked arrangement of multiple stator yokes. Simultaneously, when adjacent stator yokes are riveted together, a circular rivet point is formed on the stator yoke, with a radius of d1. Furthermore, the width of the stator yoke portion along the radial direction of the stator assembly is W, where the radius d1 of the rivet point and the width W of the stator yoke portion satisfy W ≥ 3d1.

[0024] By setting the radius d1 of the rivet point and the width W of the stator yoke to satisfy W≥3d1, the width of the part where the rivet point is located on the stator yoke can be guaranteed to be large enough, thereby ensuring the magnetic flux in the part where the rivet point is located. In other words, during the operation of the motor, the electromagnetic flow in the stator yoke can be guaranteed, thus ensuring the operating effect of the motor.

[0025] In any of the above technical solutions, two adjacent stator yokes are further riveted together, and rectangular rivet points are formed on the two adjacent stator yokes; in the radial direction of the stator assembly, the width of the stator yoke is W, and the width of the rectangular rivet point is d2, where W≥3d2.

[0026] In this technical solution, adjacent stator yokes can be connected to each other by riveting to achieve a stacked arrangement of multiple stator yokes. Simultaneously, when adjacent stator yokes are riveted together, a rectangular rivet point is formed on the stator yoke, the width of which is d2. Furthermore, the width of the stator yoke portion along the radial direction of the stator assembly is W, where the width d2 of the rivet point and the width W of the stator yoke portion satisfy W ≥ 3d2.

[0027] By setting the width d2 of the rivet point and the width W of the stator yoke to satisfy W≥3d1, it can be ensured that the width of the part where the rivet point is located on the stator yoke is large enough, thereby ensuring the magnetic flux in the part where the rivet point is located. In other words, during the operation of the motor, the electromagnetic flow in the stator yoke can be guaranteed, thus ensuring the operating effect of the motor.

[0028] In any of the above technical solutions, the winding further includes copper enameled wire.

[0029] In this technical solution, the winding is made of copper enameled wire, which can ensure the strength of the magnetic field generated by the winding after energization, that is, ensure the operating effect of the motor.

[0030] In any of the above technical solutions, further, along the axial direction of the stator assembly, the length of the stator yoke is greater than the maximum value among the length of the stator teeth, the length of the permanent magnet, and the length of the rotor core.

[0031] In this technical solution, the length of the stator yoke is greater than the maximum value among the lengths of the stator teeth, the permanent magnet, and the rotor core. In other words, the stator yoke protrudes beyond the lengths of the stator teeth, rotor core, and permanent magnet. This allows for full utilization of the protruding portion of the stator yoke to take advantage of leakage flux from the windings and permanent magnet, thereby further improving the motor's efficiency.

[0032] In any of the above technical solutions, the permanent magnet is further made of ferrite.

[0033] In this technical solution, the permanent magnet can be made of ferrite, thereby ensuring the magnetism and resistivity of the permanent magnet.

[0034] In any of the above technical solutions, the rotor assembly has P poles and the stator assembly has Ns stator slots, where P = Ns ± 2 or P = Ns ± 4.

[0035] In this technical solution, the stable operation of the motor and its operating efficiency are ensured by setting the relationship between the number of poles of the rotor assembly and the number of stator slots of the stator assembly.

[0036] In any of the above technical solutions, the motor further includes a fan motor, a permanent magnet synchronous motor, a servo motor, or a stepper motor.

[0037] According to a second aspect of the present invention, an electrical device is provided, comprising a motor as described in any of the above-described technical solutions.

[0038] The electrical device provided by this invention includes the motor described in the first aspect of this invention. Therefore, it possesses all the beneficial effects of the aforementioned motor, which will not be elaborated upon here.

[0039] Furthermore, electrical appliances include air conditioners, refrigerators, or washing machines.

[0040] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0042] Figure 1 A schematic diagram of the structure of a motor according to an embodiment of the present invention is shown;

[0043] Figure 2 A schematic diagram of the structure of a motor provided according to another embodiment of the present invention is shown.

[0044] Figure 3 It shows Figure 1 A schematic diagram of the stator assembly in an electric motor;

[0045] Figure 4 It shows Figure 3 A schematic diagram of the stator yoke and stator teeth in the stator assembly;

[0046] in, Figures 1 to 4 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0047] 100 stator assembly, 102 stator yoke, 104 stator teeth, 106 winding, 200 motor, 202 rotor assembly, 204 rotor core, 206 permanent magnet. Detailed Implementation

[0048] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0049] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0050] The following reference Figures 1 to 4 This describes stator assemblies, motors, and electrical devices provided according to some embodiments of the present invention.

[0051] The present invention proposes a first aspect, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a motor 200 is proposed, including: a stator assembly 100, including a stator yoke 102 and stator teeth 104; wherein one end of the stator teeth 104 is connected to the stator yoke 102; the stator assembly 100 also includes a winding 106, the winding 106 being wound on the stator teeth 104; a rotor assembly 202, the rotor assembly 202 including: a plurality of rotor cores 204, the plurality of rotor cores 204 being arranged at intervals along the circumference of the stator assembly 100; a plurality of permanent magnets 206, the permanent magnets 206 being disposed between two adjacent rotor cores 204; along the axial direction of the stator assembly 100, the length of the stator teeth 104 is L1, the length of the stator yoke 102 is L2, the length of the rotor cores 204 is L3, and the length of the permanent magnets 206 is L4, wherein L1 < L2, 1 < L2 / L1 < L4 / L3.

[0052] The stator assembly 100 provided by the present invention includes a stator yoke 102 and stator teeth 104, wherein one end of the stator teeth 104 is connected to the stator yoke 102, and the other end of the stator teeth 104 extends in a direction away from the stator yoke 102. Specifically, the stator yoke 102 can be an annular structure, and a plurality of stator teeth 104 are arranged at intervals along the circumference of the annular stator yoke 102, and the plurality of stator teeth 104 extend toward the interior of the annular stator yoke 102.

[0053] Furthermore, the stator assembly 100 also includes windings 106, which are wound around stator teeth 104. This allows them to engage with the magnetic field of the rotor permanent magnet in the rotor assembly when energized, thereby enabling the rotor assembly to rotate. Specifically, the number of windings 106 is the same as the number of stator teeth 104, and multiple windings 106 are arranged in a one-to-one correspondence with multiple stator teeth 104, meaning that each stator tooth 104 is wound with a winding 106. This ensures that the windings 106 of the stator assembly 100 can effectively engage with the permanent magnet of the rotor assembly, guaranteeing the motor's operating efficiency.

[0054] Furthermore, along the axial direction of the stator assembly 100, the length of the stator tooth 104 is L1, the length of the stator yoke 102 is L2, the length of the rotor core 204 is L3, and the length of the permanent magnet 206 is L4, wherein L1 < L2, that is, the length of the stator yoke 102 is set to be greater than the length of the stator tooth 104. In other words, in the axial direction of the stator assembly 100, the end of the stator yoke 102 can protrude beyond the end of the stator tooth 104. Thus, when the winding 106 is wound on the stator, a portion of the end of the winding 106 can coincide with the stator yoke 102, that is, a portion of the end of the winding 106 coincides with the stator yoke 102 that protrudes beyond the stator tooth 104. In this way, by utilizing the portion of the stator yoke 102 that protrudes beyond the stator teeth 104 and overlaps with the winding 106, the leakage flux at the end of the winding 106 can be utilized by the end of the stator yoke 102, thereby improving the operating efficiency of the motor. Specifically, along the axial direction of the stator assembly 100, the length of the stator teeth 104 is L1, and the length of the stator yoke 102 is L2, where L1 < L2.

[0055] In addition, when the stator teeth 104 are wound with the winding 106, the portion of the stator yoke 102 that protrudes from the stator teeth 104 can fit into the winding 106. In this way, the portion of the stator yoke 102 that protrudes from the stator teeth 104 can also dissipate heat from the end of the winding 106, thereby improving the heat dissipation effect of the winding 106 during motor operation, and further improving the operating stability and efficiency of the motor.

[0056] Specifically, along the axial direction of the stator assembly 100, the length of the stator yoke 102 is greater than the length of the stator tooth 104. One end of the stator yoke 102 can be flush with the other end of the stator tooth 104, while the other end of the stator yoke 102 protrudes beyond the other end of the stator tooth 104. Alternatively, both ends of the stator yoke 102 can be set to protrude beyond both ends of the stator tooth 104, so that the leakage flux at the end of the winding 106 can be utilized through the portion of the stator yoke 102 protruding from the stator tooth, thereby improving motor efficiency.

[0057] Specifically, as shown in Table 1, compared with motors in related technologies, under the same conditions of motor size, winding wire diameter, number of turns, and related parameters of permanent magnet, the motor 200 provided in this application achieves a body efficiency of 0.868 by setting the length of the stator yoke 102 in the axial direction of the stator assembly 100 to be greater than the length of the stator teeth 104. Compared with the body efficiency of 0.864 in related technologies, the motor 200 of this application achieves the technical effect of improving motor efficiency.

[0058] Table 1

[0059] Outer diameter / accumulated thickness / air gap (mm) 87 / 22 / 0.35 87 / 22 / 0.35 Stator slots / rotor poles 12 / 10 12 / 10 Wire diameter (mm) / number of turns 0.38 / 285 0.38 / 285 Slot fill rate (%) 81.3 81.3 silicon steel sheets 50W800 50W800 permanent magnet 6B 6B Phase resistance (Ω) 13.73 11.67 Phase current (A) 0.329 0.336 Torque ripple (%) 4.70 3.67 Copper loss (W) 4.45 3.94 Iron loss (W) 2.57 2.80 Mechanical loss (W) 0.41 0.41 On-body efficiency 0.864 0.868

[0060] Furthermore, the rotor assembly 202 of the motor 200 includes multiple rotor cores 204, which are arranged at intervals along the circumference of the stator assembly 100. At the same time, a permanent magnet 206 is provided between two adjacent rotor cores 204, thereby providing a magnetic field. When the winding 106 of the stator assembly 100 is energized, it can cooperate with the magnetic field generated by the winding 106 to realize the rotation of the rotor assembly 202, thereby realizing the operation of the motor 200.

[0061] Furthermore, along the axial direction of the stator assembly 100, the length of the stator tooth 104 is L1, the length of the stator yoke 102 is L2, the length of the rotor core 204 is L3, and the length of the permanent magnet 206 is L4, satisfying 1 < L2 / L1 < L4 / L3. Where 1 < L2 / L1, meaning the length of the stator yoke 102 is greater than the length of the stator tooth 104, this allows the utilization of leakage flux in the winding 106 through the portion of the stator yoke 102 protruding from the stator tooth 104, thereby improving the efficiency of the motor 200. Furthermore, L2 / L1 < L4 / L3, meaning the length of the permanent magnet 206 is greater than the length of the rotor core 204, and the permanent magnet 206 protrudes from the rotor core 204, ensuring the magnetic strength of the permanent magnet 206 and thus guaranteeing the operating performance of the motor 200.

[0062] The stator assembly 100 provided by the present invention sets the length of the stator yoke 102 in the axial direction of the stator assembly 100 to be greater than the length of the stator tooth 104, so that the end of the stator yoke 102 can protrude from the end of the stator tooth 104 in the circumferential direction of the stator assembly 100. In this way, when the winding 106 is wound on the stator tooth 104, a part of the end of the winding 106 can coincide with the part of the stator yoke 102 protruding from the stator tooth 104 in the axial direction of the stator assembly 100. On the one hand, the part of the stator yoke 102 protruding from the stator tooth 104 can make full use of the leakage magnetic field at the end of the winding 106, that is, the leakage magnetic field generated at the end of the winding 106 is utilized through the protruding part of the stator yoke 102. In conjunction with the permanent magnet of the rotor assembly of the motor, the loss of magnetic force generated by the winding 106 during the operation of the motor is reduced, that is, the operating efficiency of the motor is improved. On the other hand, the portion of the stator yoke 102 that protrudes from the stator teeth 104 can be used to fit against the winding 106 to dissipate heat at the end of the winding 106 and improve the heat dissipation effect of the winding 106.

[0063] In the above embodiments, further, as Figure 3 As shown, in the axial direction of the stator assembly 100, the length of the winding 106 is greater than or equal to the length of the stator yoke 102.

[0064] In this embodiment, in the axial direction of the stator assembly 100, the length of the winding 106 can be greater than the length of the stator yoke 102, that is, the end of the winding 106 can protrude from the stator yoke 102. Alternatively, the length of the winding 106 is equal to the length of the stator yoke 102, that is, the end of the winding 106 is flush with the end of the stator yoke 102.

[0065] Specifically, along the axial direction of the stator assembly 100, when the length of the winding 106 is greater than the length of the stator yoke 102 (i.e., the end of the winding 106 protrudes beyond the end of the stator yoke 102), the number of turns of the winding 106 can be guaranteed. This ensures the electromagnetic induction intensity generated by the winding 106 during motor operation, thereby guaranteeing the engagement effect with the permanent magnets in the rotor assembly, and thus ensuring the motor's operating performance. Simultaneously, the portion of the stator yoke 102 protruding beyond the stator teeth 104 utilizes the leakage flux generated at the end of the winding 106, improving the motor's operating efficiency and simultaneously dissipating heat from the end of the winding 106, thus enhancing its heat dissipation effect.

[0066] Alternatively, along the axial direction of the stator assembly 100, when the length of the winding 106 is equal to the length of the stator yoke 102 (i.e., when the end of the winding 106 is flush with the end of the stator yoke 102), the end of the winding 106 will not protrude from the stator yoke 102. This reduces the leakage flux at the end of the winding 106, thereby further improving the utilization rate of the leakage flux at the end of the winding 106 by the portion of the stator yoke 102 protruding from the stator teeth 104, and further improving the operating efficiency of the motor. Simultaneously, by utilizing the leakage flux generated at the end of the winding 106 through the portion of the stator yoke 102 protruding from the stator teeth 104, the operating efficiency of the motor is improved, and heat dissipation is also achieved at the end of the winding 106, improving the heat dissipation effect of the winding 106.

[0067] In any of the above embodiments, the stator yoke 102 further includes a plurality of stator yoke plates (not shown in the figure), which are stacked together.

[0068] In this embodiment, the stator yoke 102 can be formed by stacking multiple stator yoke plates, that is, by stacking multiple stator yoke plates in the axial direction of the stator assembly 100 to form the stator yoke 102. Correspondingly, the stator teeth 104 can also be formed by stacking multiple stator teeth 104 plates.

[0069] Specifically, the stator yoke laminations and stator teeth 104 can be integrally formed, thereby forming multiple stator teeth 104 within the stator yoke 102 while stacking the stator yoke laminations to form the stator yoke portion 102. It is understood that, in the axial direction of the stator assembly 100, the length of the stator yoke portion 102 is greater than the length of the stator teeth 104. Therefore, stator teeth 104 may not be provided on the stator yoke laminations located at the ends of the stator yoke portion 102, allowing the ends of the stator yoke portion 102 to protrude beyond the ends of the stator teeth 104, thereby achieving the effect of utilizing the leakage magnetic flux at the ends of the winding 106 through the protruding portion of the stator yoke portion 102.

[0070] Furthermore, two adjacent stator yokes are riveted together, and circular rivet points are formed on the two adjacent stator yokes; in the radial direction of the stator assembly 100, the width of the stator yoke 102 is W, and the radius of the circular rivet point is d1, where W≥3d1.

[0071] Specifically, adjacent stator yokes can be connected to each other by riveting to achieve a stacked arrangement of multiple stator yokes. Simultaneously, when adjacent stator yokes are riveted together, a circular rivet point is formed on the stator yoke, the radius of which is d1. Furthermore, the width of the stator yoke portion 102 along the radial direction of the stator assembly 100 is W, wherein the radius d1 of the rivet point and the width W of the stator yoke portion 102 satisfy W ≥ 3d1.

[0072] By setting the radius d1 of the rivet point and the width W of the stator yoke 102 to satisfy W≥3d1, the width of the part where the rivet point is located on the stator yoke 102 can be guaranteed to be large enough, thereby ensuring the magnetic flux in the part where the rivet point is located. In other words, during the operation of the motor, the electromagnetic flow in the stator yoke 102 can be guaranteed, thus ensuring the operating effect of the motor.

[0073] In any of the above embodiments, two adjacent stator yokes are further riveted together, and rectangular rivet points are formed on the two adjacent stator yokes; in the radial direction of the stator assembly 100, the width of the stator yoke 102 is W, and the width of the rectangular rivet point is d2, wherein W≥3d2.

[0074] In this embodiment, adjacent stator yokes can be connected to each other by riveting to achieve a stacked arrangement of multiple stator yokes. Simultaneously, when adjacent stator yokes are riveted together, a rectangular rivet point is formed on the stator yoke, the width of which is d2. Furthermore, along the radial direction of the stator assembly 100, the width of the stator yoke portion 102 is W, wherein the width d2 of the rivet point and the width W of the stator yoke portion 102 satisfy W ≥ 3d2.

[0075] By setting the width d2 of the rivet point and the width W of the stator yoke 102 to satisfy W≥3d1, it can be ensured that the width of the part where the rivet point is located on the stator yoke 102 is large enough, thereby ensuring the magnetic flux in the part where the rivet point is located. In other words, during the operation of the motor, the electromagnetic flow in the stator yoke 102 can be guaranteed, thus ensuring the operating effect of the motor.

[0076] Furthermore, winding 106 includes copper enameled wire.

[0077] Specifically, setting the winding 106 to copper enameled wire can ensure the strength of the magnetic field generated by the winding 106 after energization, which in turn ensures the operating effect of the motor.

[0078] In any of the above embodiments, further, as Figure 1 As shown, along the axial direction of the stator assembly 100, the length of the stator yoke 102 is greater than the maximum value among the lengths of the stator teeth 104, the permanent magnet 206, and the rotor core 204.

[0079] In this embodiment, the length of the stator yoke 102 is greater than the maximum value among the lengths of the stator teeth 104, the permanent magnet 206, and the rotor core 204. That is, the stator yoke 102 protrudes beyond the lengths of the stator teeth 104, the rotor core 204, and the permanent magnet 206. This allows for full utilization of the protruding portion of the stator yoke 102 to take advantage of the leakage flux of the windings 106 and the permanent magnet 206, thereby further improving the efficiency of the motor 200.

[0080] In any of the above embodiments, the rotor assembly 202 further has P poles and the stator assembly 100 has Ns stator slots, where P = Ns ± 2 or P = Ns ± 4.

[0081] In this embodiment, by setting the relationship between the number of poles of the rotor assembly 202 and the number of stator slots of the stator assembly 100, the stable operation of the motor 200 and the operating efficiency of the motor 200 are ensured.

[0082] Furthermore, the permanent magnet 206 is made of ferrite.

[0083] Specifically, the permanent magnet 206 can be made of ferrite to ensure the magnetism and resistivity of the permanent magnet 206.

[0084] Furthermore, the motor 200 includes a fan motor 200, a permanent magnet synchronous motor 200, a servo motor 200, or a stepper motor 200.

[0085] According to a second aspect of the present invention, an electrical device is provided, comprising a motor 200 as described in any of the above-described technical solutions.

[0086] The electrical device provided by this invention includes the motor 200 as described in the first aspect of this invention. Therefore, it possesses all the beneficial effects of the motor 200 described above, which will not be discussed in detail here.

[0087] In the description of this invention, the term "a plurality of" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0088] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. 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 any suitable manner in one or more embodiments or examples.

[0089] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electric motor, characterized in that, include: Stator assembly, the stator assembly comprising: stator yoke; Stator teeth, one end of which is connected to the stator yoke; A winding, the winding being wound on the stator teeth; Rotor assembly, the rotor assembly comprising: Multiple rotor cores are arranged at circumferential intervals along the stator assembly; Multiple permanent magnets are disposed between two adjacent rotor cores; Along the axial direction of the stator assembly, the length of the stator teeth is L1, the length of the stator yoke is L2, the length of the rotor core is L3, and the length of the permanent magnet is L4. Where L1 < L2, 1 < L2 / L1 < L4 / L3; Along the axial direction of the stator assembly, the length of the stator yoke is greater than the maximum value among the lengths of the stator teeth, the permanent magnet, and the rotor core, and the stator yoke protrudes from the stator teeth, the rotor core, and the permanent magnet.

2. The motor according to claim 1, characterized in that, In the axial direction of the stator assembly, the length of the winding is greater than or equal to the length of the stator yoke.

3. The motor according to claim 1 or 2, characterized in that, The stator yoke includes a plurality of stator yoke plates, which are stacked together.

4. The motor according to claim 3, characterized in that, Two adjacent stator yokes are riveted together, and circular rivet points are formed on the two adjacent stator yokes; In the radial direction of the stator assembly, the width of the stator yoke is W, and the radius of the circular rivet point is d1. Where W≥3d1.

5. The motor according to claim 3, characterized in that, Two adjacent stator yokes are riveted together, and rectangular rivet points are formed on the two adjacent stator yokes; In the radial direction of the stator assembly, the width of the stator yoke is W, and the width of the rectangular rivet point is d2. Where W≥3d2.

6. The motor according to claim 1 or 2, characterized in that, The winding comprises copper enameled wire.

7. The motor according to claim 1 or 2, characterized in that, The permanent magnet is made of ferrite.

8. The motor according to claim 1 or 2, characterized in that, The rotor assembly has P poles, and the stator assembly has Ns stator slots. Where P = Ns ± 2 or P = Ns ± 4.

9. The motor according to claim 1 or 2, characterized in that, The motor includes a fan motor, a permanent magnet synchronous motor, a servo motor, or a stepper motor.

10. An electrical appliance, characterized in that, include: The motor as described in any one of claims 1 to 9.

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