A stator lamination, a stator core, a stator assembly, an electric machine and a fixed-wing aircraft

Abstract

The utility model discloses an embodiment relates to motor technical field, especially disclose a kind of stator punching sheet, including stator yoke and multiple stator teeth, multiple stator teeth are fixed to stator yoke along the circumferential spacing of stator yoke, stator yoke is provided with cooling hole, stator tooth includes crown and tooth portion, one end of tooth portion is fixed to stator yoke, the other end of tooth portion is connected with crown. Through the size design of each part of stator punching sheet, the utility model embodiment can make the size of stator punching sheet increase, but weight is reduced, so that the power of motor is higher, and does not affect the flight load of fixed-wing aircraft.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a stator lamination, stator core, stator assembly, motor, and fixed-wing aircraft. Background Technology

[0002] Fixed-wing aircraft are a crucial type of aircraft in the aviation field, and their power systems are essential for successful flight. With technological advancements and increased environmental awareness, electric motors have gradually replaced internal combustion engines as the energy system for fixed-wing aircraft. As a core power component, the electric motor directly affects the overall energy efficiency and flight stability of the aircraft. The larger the stator core size in the electric motor, the greater the output torque, thereby increasing the motor's power.

[0003] In the process of implementing the embodiments of this utility model, the inventors discovered that the larger the size of the stator core, the greater the weight of the motor, and an excessively heavy motor affects the flight time and energy consumption of the fixed-wing aircraft. Utility Model Content

[0004] The main technical problem solved by this utility model embodiment is to provide a stator lamination, which aims to solve the problem of the stator core composed of traditional stator laminations being too small in size.

[0005] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: providing a stator lamination, including a stator yoke and a plurality of stator teeth, wherein the plurality of stator teeth are fixedly fixed to the stator yoke at circumferential intervals, and each stator tooth includes a crown and a tooth, one end of the tooth is fixed to the stator yoke, and the other end of the tooth is connected to the crown.

[0006] Optionally, a stator slot is provided between two adjacent stator teeth, and the stator slot is used for winding the coil.

[0007] Optionally, the stator yoke is annular, and the thickness of the stator yoke along the radial direction of the stator yoke is T1, and 2.3mm≤T1≤2.7mm.

[0008] Optionally, the center of the stator yoke is RD1 from the top of the stator tooth, and 98mm≤RD1≤102mm; the center of the stator yoke is RD2 from the bottom of the stator tooth, and 66mm≤RD2≤70mm.

[0009] Optionally, the width of the tooth is W1 in a direction perpendicular to the tooth and toward the crown, and 3.9mm≤W1≤4.1mm.

[0010] Optionally, along a direction perpendicular to the tooth portion toward the crown portion, the thickness of the crown portion gradually decreases, and the end face of the crown portion near the tooth portion forms an angle X with the center line of two adjacent stator teeth, and 73°≤X≤77°.

[0011] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is: to provide a stator core, including a plurality of stator laminations as described above, wherein the stator laminations are provided with notches, the plurality of stator laminations are stacked along the axial direction of the stator yoke, and the notches of the plurality of stator laminations are aligned.

[0012] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is: to provide a stator assembly, including a stator base and the above-mentioned stator core, wherein the stator base is provided with a boss, the stator core is installed on the stator base, and the boss is engaged with the notch.

[0013] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is: to provide an electric motor, including a rotor assembly and the stator assembly described above, wherein the rotor assembly and the stator assembly are rotatably connected.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is to provide a fixed-wing aircraft, including the above-mentioned motor.

[0015] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment provides a stator lamination, including a stator yoke and multiple stator teeth. The multiple stator teeth are fixed to the stator yoke at circumferential intervals. The stator yoke is provided with cooling holes. Each stator tooth includes a crown and a tooth portion. One end of the tooth portion is fixed to the stator yoke, and the other end of the tooth portion is connected to the crown. Through the dimensional design of each part of the stator lamination, the size of the stator lamination is increased, but the weight is reduced, resulting in higher motor power without affecting the flight payload of the fixed-wing aircraft. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a stator lamination provided in an embodiment of the present invention; Figure 2 This is another schematic diagram of the stator lamination provided in this embodiment of the present invention; Figure 3This is a schematic diagram of the stator core provided in an embodiment of the present utility model; Figure 4 These are experimental data diagrams of the motor of this application provided in the embodiments of this utility model; Figure 5 This is an experimental data graph of the comparative motor provided in this embodiment of the utility model; Explanation of reference numerals in the attached figures: 100. Stator laminations; 10. Stator yoke; 11. Cooling hole; 12. Notch; 20. Stator tooth; 21. Crown; 22. Tooth; 30. Stator slots; 1000. Stator core. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1 The stator lamination 100 includes a stator yoke 10 and a plurality of stator teeth 20. The plurality of stator teeth 20 are fixed to the stator yoke 10 at circumferential intervals. A stator slot 30 is provided between two adjacent stator teeth 20. The stator slot 30 is used for winding coils.

[0021] For the stator yoke 10 mentioned above, please refer to... Figure 1 and Figure 2 The stator yoke 10 is provided with cooling holes 11 and notches 12. The cooling holes 11 can serve as a flow channel for the cooling medium, ensuring that the cooling medium can contact the stator laminations 100 to reduce the temperature of the stator laminations 100. The notches 12 are located on the inner wall of the stator yoke 10 and are used for the installation and positioning of the stator laminations 100.

[0022] In this embodiment, there are 24 stator teeth 20 and 24 stator slots 30.

[0023] The stator yoke 10 is annular, and its radial thickness is T1, with a range of 2.3 mm ≤ T1 ≤ 2.7 mm. Within this range, the stator yoke 10 does not experience magnetic saturation under rated operating magnetic flux density.

[0024] For the stator tooth 20 mentioned above, please refer to... Figure 1 and Figure 2 The stator tooth 20 includes a crown 21 and a tooth 22. One end of the tooth 22 is connected to the crown 21, and the other end of the tooth 22 is fixed to the stator yoke 10.

[0025] Along the direction perpendicular to the tooth portion 22 toward the crown portion 21, the width of the tooth portion 22 is W1, and 3.9mm≤W1≤4.1mm.

[0026] Along the direction perpendicular to the tooth 22 toward the crown 21, the thickness of the crown 21 gradually decreases. The end face of the crown 21 near the tooth 22 forms an angle X with the center line of the two adjacent stator teeth 20, and 73°≤X≤77°.

[0027] The thinnest part of the crown 21 has a thickness of S1, where 2.3 mm ≤ S1 ≤ 2.7 mm.

[0028] Along the direction perpendicular to the end face of the crown 21 near the tooth 22, the distance from the thinnest part of the crown 21 to the outer diameter surface of the stator yoke 10 is the depth L1 of the stator groove, and 13mm≤L1≤14mm.

[0029] The distance between the center of the stator yoke 10 and the top of the stator tooth 20 is RD1, and 98mm≤RD1≤102mm. The distance between the center of the stator yoke 10 and the bottom of the stator tooth 20 is RD2, and 66mm≤RD2≤70mm.

[0030] The end faces of the crowns 21 of two adjacent stator teeth 20 are W2 apart, and 2.0mm≤W2≤2.4mm.

[0031] It should be noted that in this embodiment, the stator yoke 10 and stator teeth 20 of the stator lamination 100 are geometrically designed. The width W1 of the tooth 22 affects the magnetic flux density of the stator teeth 20, and the thickness T1 of the stator yoke 10 affects the magnetic flux density of the stator yoke 10. By matching the geometric relationship between W1 and T1, the magnetic flux density of the stator teeth and the stator yoke is made approximately equal to achieve magnetic circuit balance.

[0032] Through calculation and model building, simulation and finite element analysis are performed. The dimensions of each part are optimized so that the stator laminations can achieve the target magnetic flux density, thereby increasing the efficiency of the motor.

[0033] In this embodiment of the invention, the stator lamination 100 includes a stator yoke 10 and a plurality of stator teeth 20. The plurality of stator teeth 20 are fixed to the stator yoke 10 at circumferential intervals. A stator slot is provided between two adjacent stator teeth 20 for winding coils. By designing the dimensions of each part of the stator lamination 100, this embodiment of the invention can increase the size of the stator lamination 100 while reducing its weight, resulting in higher motor power without affecting the flight payload of the fixed-wing aircraft.

[0034] This utility model provides an embodiment of stator core 1000. Please refer to [link / reference]. Figure 3 The stator core 1000 includes a plurality of stator laminations 100 as described above. The plurality of stator laminations 100 are stacked along the axial direction of the stator yoke 10, and the notches 12 of the plurality of stator laminations 100 are aligned. For the structure and function of the stator laminations 100, please refer to the above embodiments, which will not be repeated here.

[0035] In some embodiments, the stator core 1000 is coated with an insulating material on the slot wall of the stator slot 30.

[0036] This utility model provides an embodiment of a stator assembly (not shown), including a stator base (not shown) and the aforementioned stator core 1000. The stator base is provided with a boss (not shown), and the stator core 1000 is installed on the stator base. The boss is engaged with the notch 12.

[0037] This utility model provides an embodiment of a motor (not shown in the figure), including a rotor assembly and the stator assembly described above, wherein the rotor assembly and the stator assembly are rotatably connected.

[0038] Please see Figure 4 and Figure 5 , Figure 4 These are experimental data for a motor composed of stator laminations 100 according to an embodiment of the present invention. Figure 5 The experimental data is for motors of similar products used in fixed-wing aircraft, where the pull force is the dependent variable. By changing the pull force, the torque and efficiency of the motor can be changed. Thus, the torque and efficiency of the motor product of this application and the comparative product under the same pull force are compared. The comparison data shows that, under the same pull force, the torque and efficiency of the motor product of this application are higher than those of the comparative product.

[0039] Furthermore, since the overall size of the stator lamination 100 of this application is larger and the weight is smaller than that of the stator lamination 100 of the comparative product, the motor product of this application has stronger power and does not affect the payload of the fixed-wing aircraft, and has less impact on the flight time and energy consumption of the fixed-wing aircraft.

[0040] This utility model provides an embodiment of a fixed-wing aircraft (not shown), including the aforementioned motor.

[0041] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A stator lamination, characterized in that, include: The stator yoke is provided with several cooling holes; Multiple stator teeth are fixed to the stator yoke at circumferential intervals. Each stator tooth includes a crown and a tooth. One end of the tooth is fixed to the stator yoke, and the other end of the tooth is connected to the crown.

2. The stator lamination according to claim 1, characterized in that, A stator slot is provided between two adjacent stator teeth, and the stator slot is used for winding the coil.

3. The stator lamination according to claim 1, characterized in that, The stator yoke is annular, and the thickness of the stator yoke along the radial direction is T1, and 2.3mm≤T1≤2.7mm.

4. The stator lamination according to claim 3, characterized in that, The distance between the center of the stator yoke and the top of the stator tooth is RD1, and 98mm≤RD1≤102mm. The distance between the center of the stator yoke and the bottom of the stator tooth is RD2, and 66mm≤RD2≤70mm.

5. The stator lamination according to claim 1, characterized in that, Along the direction perpendicular to the tooth portion toward the crown portion, the width of the tooth portion is W1, and 3.9mm≤W1≤4.1mm.

6. The stator lamination according to claim 5, characterized in that, Along the direction perpendicular to the tooth portion toward the crown portion, the thickness of the crown portion gradually decreases, and the end face of the crown portion near the tooth portion forms an angle X with the center line of two adjacent stator teeth, and 73°≤X≤77°.

7. A stator core, characterized in that, It includes a plurality of stator laminations as described in any one of claims 1-6, wherein the stator laminations are provided with notches, the plurality of stator laminations are stacked along the axial direction of the stator yoke, and the notches of the plurality of stator laminations are aligned.

8. A stator assembly, characterized in that, It includes a stator base and a stator core as described in claim 7, wherein the stator base is provided with a boss, the stator core is installed in the stator base, and the boss is engaged with the notch.

9. An electric motor, characterized in that, It includes a rotor assembly and a stator assembly as described in claim 8, the rotor assembly and the stator assembly being rotatably connected.

10. A fixed-wing aircraft, characterized in that, Includes the motor as described in claim 9.

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