Vehicle and its aircraft, drive motor, motor stator

Abstract

The application discloses a vehicle and an aircraft, a driving motor and a motor stator thereof, and relates to the technical field of transportation. The motor rotor of the driving motor comprises a rotor shell and a plurality of permanent magnets with different magnetization directions, and the magnetization directions of the permanent magnets are sequentially arranged according to a preset orientation relationship. The motor stator comprises a stator yoke and a stator tooth, and the end of the stator tooth away from the motor rotor is separately arranged and connected with the stator yoke, which is beneficial to improving the installation convenience of the coil, the slot fill rate, the output power of the driving motor, the utilization rate of the core material of the motor stator and the selection range of the material. The magnetization directions of the permanent magnets are sequentially arranged according to the preset orientation relationship, which is beneficial to gathering the magnetic force lines on the motor stator side, increasing the magnetic field and improving the output power, and beneficial to the lightweight of the driving motor. Under the demand of the same outer diameter of the driving motor, the overall motor rotor can be arranged to be narrower, and the motor stator and the coil are beneficial to being larger to improve the output power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transportation, in particular to a vehicle and an aircraft, a driving motor and a motor stator thereof. BACKGROUND

[0002] With the development of transportation technology, the ordinary manned aircraft type of vehicle is becoming more and more popular. With the development of lithium battery technology, some aircraft are set as electric aircraft. With the increase of flight mileage demand, the total capacity of lithium battery becomes larger, and the total weight of the aircraft and the flight load also become larger.

[0003] In order to reduce the flight load, the aircraft usually needs to reduce the weight of the driving motor; but in the case of reducing the weight of the driving motor, the output power of the driving motor is usually reduced. SUMMARY

[0004] The main purpose of the present application is to provide a driving motor, which aims to improve the output power.

[0005] To achieve the above purpose, the driving motor provided by the present application is used for an aircraft, and the driving motor comprises a motor rotor, a motor stator and a coil. The motor rotor comprises a rotor shell and a plurality of permanent magnets with different magnetization directions, the permanent magnets are arranged on the surface of the rotor shell and are sequentially arranged along the circumferential direction of the rotor shell, and the magnetization directions of the permanent magnets are sequentially arranged according to a preset orientation relationship. The motor stator comprises a stator yoke and at least two stator teeth which are spaced apart along the circumferential direction of the stator yoke, the stator teeth are arranged between the stator yoke and the motor rotor, one end of the stator teeth away from the motor rotor is separately arranged with the stator yoke and connected with the stator yoke, and the coil is sleeved on the stator teeth.

[0006] Optionally, at least two flanges are arranged on one side of the stator yoke facing the stator teeth, the flanges are spaced apart along the circumferential direction of the stator yoke, one end of the stator teeth facing the stator yoke is provided with a notch, and the flanges extend into the notch and are fixedly connected with the notch.

[0007] Optionally, the side wall surface of the flange abuts against the side wall surface of the notch, and the end surface of the stator tooth away from the motor rotor abuts against the outer circumferential wall of the stator yoke.

[0008] Optionally, one end of the stator tooth away from the motor rotor is adhesively fixed with the stator yoke, and / or the two side wall surfaces of the flange arranged oppositely abut against the side wall surface of the notch.

[0009] Optionally, at least one of the stator teeth is provided with at least one notch, and a ratio of a total width of the notches on the same stator tooth to a width of the stator tooth is greater than or equal to 0.2 and less than or equal to 0.4.

[0010] Optionally, a magnetizing angle enclosed between a magnetizing direction of the permanent magnet and a direction of the permanent magnet radially inwardly; the preset orientation relationship is set to, along a circumferential direction of the rotor shell, the magnetizing angle of each of the permanent magnets sequentially increases by a preset incremental angle.

[0011] Optionally, the rotor shell is made of titanium alloy.

[0012] Optionally, the stator teeth and the stator yoke are made of different magnetic conductive materials.

[0013] Optionally, the magnetic permeability of the stator teeth is greater than the magnetic permeability of the stator yoke.

[0014] Optionally, the motor rotor is composed of the rotor shell and the permanent magnet.

[0015] Optionally, the motor rotor is sleeved outside the motor stator, the permanent magnet is arranged on the inner side of the rotor shell; one end of the stator tooth towards the motor rotor is provided with a lateral protrusion, the lateral protrusion is arranged on the side of the height direction of the stator tooth; the cross section of the wire body of the coil is rectangular or round rectangular or circular, and part of the wire body is arranged in the interval between the two adjacent stator teeth.

[0016] The application also provides an aircraft, which comprises a cabin body, a rotor mechanism and the driving motor.

[0017] The application also provides a vehicle, which comprises the aircraft.

[0018] The application also provides a motor stator for a driving motor of an aircraft, which comprises a stator yoke and at least two stator teeth arranged at intervals along the circumferential direction of the stator yoke; one end of the stator tooth is arranged separately from the stator yoke and connected thereto; the stator yoke is provided with at least two flanges on the side towards the stator tooth, and the flanges are arranged at intervals along the circumferential direction of the stator yoke; the stator tooth is provided with a notch at one end towards the stator yoke, and the flange extends into the notch and is fixedly connected thereto.

[0019] The technical scheme of the application is characterized in that the stator teeth are arranged separately from the stator yoke at one end away from the motor rotor and connected to the stator yoke, which is beneficial to improving the installation convenience of the coil, improving the slot fill rate and improving the output power of the driving motor; the separate arrangement of the stator teeth and the stator yoke is also beneficial to improving the utilization rate of the core material of the motor stator and increasing the selection range of the material. The permanent magnets are arranged on the surface of the rotor shell and arranged in sequence along the circumferential direction of the rotor shell, and the magnetization directions of the permanent magnets are arranged in sequence according to the preset orientation relationship, which is beneficial to making the motor rotor converge magnetic lines on the motor stator side to increase the magnetic field and thus improve the output power of the driving motor, and can reduce the use of the rotor core to reduce the weight of the driving motor, which is beneficial to the lightweight of the driving motor; in addition, under the demand of the same outer diameter of the driving motor, the motor rotor as a whole can be arranged to be narrower, and the motor stator and the coil are beneficial to being larger to improve the output power of the driving motor. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0021] Figure 1 The structural schematic diagram of an embodiment of the aircraft provided by the application is shown in the figure;

[0022] Figure 2 The axial schematic diagram of an embodiment of the driving motor provided by the application is shown in the figure;

[0023] Figure 3 The axial partial schematic diagram of an embodiment of the driving motor provided by the application is shown in the figure;

[0024] Figure 4 The axial partial schematic diagram of the motor rotor in an embodiment of the application is shown in the figure;

[0025] Figure 5 The use state schematic diagram of the permanent magnet in an embodiment of the application is shown in the figure;

[0026] Figure 6 The partial exploded schematic diagram of an embodiment of the motor stator provided by the application is shown in the figure;

[0027] Figure 7 The partial structural schematic diagram of an embodiment of the motor stator provided by the application is shown in the figure;

[0028] Figure 8 The axial partial schematic diagram of an embodiment of the motor stator provided by the application is shown in the figure;

[0029] Figure 9Fig. 2 is a schematic view of a partial structure of another embodiment of a motor stator provided in the present application;

[0030] Figure 10 Fig. 2 is a schematic view of a partial structure of another embodiment of a motor stator provided in the present application;

[0031] Figure 11 Fig. 2 is a schematic view of a partial structure of another embodiment of a motor stator provided in the present application;

[0032] Figure 12 Fig. 2 is a schematic view of a partial structure of another embodiment of a motor stator provided in the present application;

[0033] Figure 13 Fig. 2 is a schematic view of a partial structure of another embodiment of a motor stator provided in the present application.

[0034] Brief Description of the Drawings:

[0035] 10, aircraft; 11, cabin body; 12, rotor mechanism; 13, driving motor; 100, motor rotor; 110, rotor shell; 120, permanent magnet; 200, motor stator; 210, stator yoke; 211, flange; 212, solid inclined section; 213, first solid section; 214, second solid section; 215, expanded sub-section; 216, flat sub-section; 220, stator tooth; 221, notch; 222, mouth inclined section; 223, first mouth section; 224, second mouth section; 225, flat section; 226, end section; 227, first filling solidification layer; 228, second filling solidification layer; 230, lateral protrusion; 300, coil; 310, wire body.

[0036] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] It should be noted that if the directionality indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of the present application, the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directionality indication also changes accordingly.

[0039] In addition, if the description of "first", "second", etc. is involved in the embodiments of the present application, the description of "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope claimed by the present application.

[0040] With the development of transportation technology, the ordinary manned aircraft of this type of vehicle is becoming more and more popular. With the development of lithium battery technology, some aircraft are set as electric aircraft. With the increase of flight mileage demand, the total capacity of lithium battery becomes larger, and the total weight of the aircraft and the flight load also becomes larger.

[0041] In order to reduce the flight load, the aircraft usually needs to reduce the weight of the driving motor; but in the case of reducing the weight of the driving motor, the output power of the driving motor is usually reduced.

[0042] Reference Figure 1 In an embodiment of the present application, the driving motor 13 can be used for the aircraft 10 of the vehicle, the aircraft 10 includes a cabin body 11, a rotor mechanism 12 and a driving motor 13, the driving motor 13 is installed on the cabin body 11, and the driving motor 13 is in driving connection with the rotor mechanism 12 to drive the rotor mechanism 12 to rotate. Wherein, the cabin body 11 has a load cabin, which can be used to carry passengers or goods. In addition, the driving motor 13 can be set as an outer rotor motor or an inner rotor motor; wherein Figures 2 to 13 The related embodiments of the outer rotor motor are shown, Figure 13 The related embodiments of the inner rotor motor are shown.

[0043] Among them, the vehicle proposed by the present application can only include the above-mentioned aircraft; of course, the vehicle can also include a land vehicle, and the aircraft 10 can be movably installed on the land vehicle, and the present embodiment does not limit this.

[0044] In order to improve the output power of the driving motor, refer to Figure 2 and Figure 3The driving motor 13 in an embodiment of the present application comprises a motor rotor 100, a motor stator 200 and a coil 300. The motor rotor 100 comprises a rotor shell 110 and a plurality of permanent magnets 120 with different magnetization directions, which are arranged on the surface of the rotor shell 110 and sequentially arranged along the circumferential direction P of the rotor shell 110, wherein the permanent magnets 120 can be sequentially connected along the circumferential direction P of the rotor shell 110. The magnetization directions of the permanent magnets 120 are sequentially arranged according to a preset orientation relationship, which can be understood as that the magnetization directions of the permanent magnets 120 are arranged according to a preset rule.

[0045] Referring to Figure 2 and Figure 3 , the motor rotor 100 can be sleeved outside the motor stator 200, which can be understood as that the driving motor 13 is arranged as an external rotor motor, and the permanent magnets 120 are arranged on the inner side surface of the rotor shell 110. Of course, referring to Figure 13 , the motor rotor 100 can also be sleeved inside the motor stator 200, which can be understood as that the driving motor 13 is arranged as an internal rotor motor, and the permanent magnets 120 are arranged on the outer side surface of the rotor shell 110.

[0046] In some embodiments, the magnetization angle formed between the magnetization direction of the permanent magnet 120 and the direction of the permanent magnet 120 radially inward; the preset orientation relationship can be arranged as that along the circumferential direction of the rotor shell 110, the magnetization angle of each permanent magnet 120 increases by a preset incremental angle. For example, referring to Figure 4 , the motor rotor 100 comprises at least two groups of magnets, each group of magnets comprising at least two permanent magnets 120 described above, for example, comprising four permanent magnets 120 described above; for the driving motor 13 in the form of an external rotor motor, the group of magnets is arranged on the inner side surface of the rotor shell 110 and sequentially arranged along the circumferential direction P of the rotor shell 110; for the driving motor 13 in the form of an internal rotor motor, the group of magnets is arranged on the outer side surface of the rotor shell 110 and sequentially arranged along the circumferential direction of the rotor shell 110. Taking the driving motor 13 in the form of an external rotor motor as an example, and taking the group of magnets comprising Figure 4 four permanent magnets 120 as an example, the magnetization angles (referring to the solid arrows in Figure 4 ) of the four permanent magnets 120 formed between the magnetization directions of the four permanent magnets 120 and the directions R1, R2, R3, R4 of the four permanent magnets 120 radially inward are 0 degrees, 90 degrees, 180 degrees and 270 degrees, which can be understood as that the magnetization angles of the four permanent magnets 120 sequentially increase by a preset incremental angle of 90 degrees. In this embodiment, referring to Figure 5, the motor rotor 100 converges the magnetic force lines on the motor stator 200 side to increase the magnetic field, and relatively weakens the magnetic force lines on the rotor shell 110 side. Among them, the magnetization directions of the permanent magnets 120 are sequentially arranged according to the preset orientation relationship, which can reduce the use of the rotor core; for example, the rotor shell 110 is made of titanium alloy to reduce the magnetic permeability, reduce the overall weight and improve the structural strength of the rotor shell 110. Further, the motor rotor 100 can no longer be provided with a rotor core in addition to the rotor shell 110 and the permanent magnet 120; it can be understood that the motor rotor 100 is composed of the rotor shell 110 and the permanent magnet 120, and does not contain the rotor core in addition to the rotor shell 110, the permanent magnet 120 and the connecting structure such as the bonding therebetween.

[0047] Of course, the magnetization angles of each permanent magnet 120 can be sequentially increased by other preset incremental angles, and the preset orientation relationship of the magnetization directions of the permanent magnets 120 can also be set as other preset orientation relationships, which are not limited by the present embodiment.

[0048] Referring to Figure 3 , the motor stator 200 includes a stator yoke 210 and at least two stator teeth 220 spaced apart along the circumferential direction of the stator yoke 210, and the space between the two adjacent stator teeth 220 can form a stator slot; it can be understood that the number of stator teeth 220 can be determined according to electromechanical rules, and the present embodiment will not be described in detail. Among them, the stator teeth 220 are arranged between the stator yoke 210 and the motor rotor 100. Referring to Figure 3 , one end of the stator tooth 220 towards the motor rotor 100 can be provided with a lateral protrusion 230, for example Figure 3 , the right end of the stator tooth 220 is provided with the lateral protrusion 230; the lateral protrusion 230 is arranged on the side of the height direction of the stator tooth 220, wherein the height direction of the stator tooth 220 can be understood as parallel to the radial direction R0 of the driving motor 13 or the motor rotor 100, at this time the lateral protrusion 230 can be arranged on the left side, the right side or both sides of the R0 direction. Among them, the lateral protrusion 230 can form a boot-shaped part, which reduces the opening rate of the two adjacent stator teeth 220, which can be understood as reducing the opening rate of the above-mentioned stator slot. Of course, one end of the stator tooth 220 towards the motor rotor 100 can also not be provided with the lateral protrusion 230, which can be understood as the stator tooth 220 is relatively straight as a whole, thereby facilitating the installation of the coil 300.

[0049] Referring to Figure 3 and Figure 6, the one end of the stator tooth 220 away from the motor rotor 100 is provided separately from the stator yoke 210 and connected, for example, the one end of the stator tooth 220 in the figure towards the left is provided separately from the stator yoke 210 and connected; it can be understood that the stator tooth 220 and the stator yoke 210 can be manufactured separately, and after forming, they are connected through an assembly process, for example, fixed connection modes such as interference fit, industrial glue bonding, etc. Among them, the industrial glue can use epoxy resin glue and the like. In addition, the stator tooth 220 and the stator yoke 210 can be formed by stacking laminations respectively, and can be fixed by welding on the outside. In this embodiment, referring to Figure 7 , the coil 300 can be assembled with the stator tooth 220 first, and then the coil 300 is installed together with the stator tooth 200 on the stator yoke 210, which can be understood as reducing the hindrance of the above-mentioned lateral protrusion 230 to the coil 300 during the installation process. In addition, by providing the stator tooth 220 with a lateral protrusion 230 at one end towards the motor rotor 100, the lateral protrusion 230 is provided on the side of the height direction of the stator tooth 220, and the stator tooth 220 can improve the output power of the driving motor 13 by improving the absorption of the magnetomotive force through the lateral protrusion 230.

[0050] Of course, for the stator tooth 200 without the above-mentioned lateral protrusion 230, the coil 300 can also be assembled with the stator tooth 220 first, and then the coil 300 is installed together with the stator tooth 200 on the stator yoke 210, so as to improve the installation efficiency through the adjustment of this process.

[0051] In some embodiments, referring to Figure 3 , the stator yoke 210 can include an integrally provided yoke segment, which connects at least two stator teeth 220; for example, the stator yoke 210 only includes one yoke segment, and the central angle of the yoke segment is equal to 360 degrees; of course, the stator yoke 210 can also be provided to include other number of yoke segments, for example, two or four yoke segments, and the central angle of each yoke segment is set to 180 degrees or 90 degrees, and this embodiment does not limit this.

[0052] In this embodiment, since the stator yoke 210 can be provided to be narrower, the integrally provided yoke segment connects at least two stator teeth 220, which is beneficial to improve the installation stability of the stator tooth 220 installed on the stator yoke 210, improve the operation stability of the driving motor 13, and reduce the risk of damage to the protective paint of the coil 300.

[0053] Continuing to refer to Figure 3 and Figure 7The cross section of the wire body 310 of the coil 300 can be set as a rectangle, a rounded rectangle or a circle, and part of the wire body 310 is arranged in the interval between two adjacent stator teeth 220. It can be understood that the coil 300 can be formed by winding one or more wire bodies 310, and the wire body 310 with a rectangular or rounded rectangular cross section can be understood as a flat wire, and the wire body 310 with a circular cross section can be understood as a round wire. Referring to Figure 3 In the case of setting the driving motor 13 as an outer rotor motor under the same requirement of the outer diameter of the driving motor 13, the overall motor rotor 100 can be set to be narrower, and the outer diameter of the stator yoke 210 can be increased; at this time, the width uniformity of the stator yoke 210 can be improved, for example Figure 3 The width W11 of each position of the stator yoke 210 in the embodiment can be made closer. Meanwhile, referring to Figure 8 The surrounding angle A between the stator teeth 220 and the stator yoke 210 is smaller, and it can be understood that the local stator yoke 210 is relatively smoother, and the surrounding angle A between the stator teeth 220 and the stator yoke 210 is closer to 90 degrees, so that the space utilization of the wire body 310 with a rectangular or rounded rectangular or circular cross section at the surrounding angle A is higher.

[0054] Of course, for the driving motor 13 set as an outer rotor motor or an inner rotor motor, under the same requirement of the outer diameter of the driving motor 13 (it can be understood that under the same requirement of the overall size of the driving motor 13), the overall motor rotor 100 can be set to be narrower, and the motor stator 200 and the coil 300 are beneficial to be larger to improve the output power of the driving motor.

[0055] Therefore, it can be understood that in the embodiment, the one end of the stator tooth 220 away from the motor rotor 100 is arranged separately from the stator yoke 210 and connected, which is beneficial to improve the installation convenience of the coil 300 and improve the slot fill rate to improve the output power of the driving motor 13; the separate arrangement of the stator tooth 220 and the stator yoke 210 is also beneficial to improve the utilization rate of the core material of the motor stator 200 and increase the selection range of the material. The permanent magnet 120 is arranged on the surface of the rotor shell 110 and arranged in sequence along the circumferential direction of the rotor shell 110, and the magnetization direction of the permanent magnet 120 is arranged in sequence according to the preset orientation relationship, which is beneficial to make the motor rotor 100 gather magnetic field lines on the motor stator 200 side to increase the magnetic field and thus improve the output power of the driving motor 13, and can reduce the use of the rotor core to reduce the weight of the driving motor 13, which is beneficial to the lightweight of the driving motor 13; in addition, under the same requirement of the outer diameter of the driving motor 13, the overall motor rotor 100 can be set to be narrower, and the motor stator 200 and the coil 300 are beneficial to be larger to improve the output power of the driving motor 13.

[0056] For the form that the stator teeth 220 are separately arranged with the stator yoke 210 and connected with each other, in some embodiments, referring to Figure 6 and Figure 8 , the stator yoke 210 is provided with at least two flanges 211 on the side thereof facing the stator teeth, and the flanges 211 are arranged in the circumferential direction P of the stator yoke 210; referring to Figure 6 and Figure 8 , when the corresponding driving motor 13 is arranged as an external rotor motor, the outer periphery of the stator yoke 210 can be provided with the above-mentioned flanges 211; referring to Figure 13 , when the corresponding driving motor 13 is arranged as an internal rotor motor, the inner periphery of the stator yoke 210 can be provided with the above-mentioned flanges 211. The flanges 211 can be arranged in an integral manner with the stator yoke 210, for example, by stamping or punching. The stator teeth 220 are provided with a notch 221 on the end thereof facing the stator yoke 210, wherein the notch 221 can be processed by stamping, punching or the like; the flanges 211 extend into the notch 221 and are fixedly connected with the notch 221, for example, by interference fit or adhesive bonding, for example, the end of the stator teeth 220 facing the stator yoke 210 can be adhesively fixed with the stator yoke 210.

[0057] In this embodiment, the flanges 211 that need to extend into the notch 221 are relatively narrow (the flanges 211 are relatively narrow with respect to the stator teeth 220), which is beneficial to control the dimensional accuracy of the flanges 211 during the forming process, so that the tightness of the cooperation between the flanges 211 and the notch 221 can be better controlled within a predetermined range, thereby improving the overall dimensional accuracy of the driving motor 13 and improving the overall performance of the driving motor 13. On the other hand, by arranging the flanges 211 on the stator yoke 210, the overall structural strength of the motor stator 200 can be improved, and the stator yoke 210 can be made narrower while maintaining a certain structural strength under the condition that the outer diameter of the stator yoke 210 is increased.

[0058] In some embodiments, referring to Figure 6 , the side surface of the flange 211 and the top surface of the flange 211 are connected with a solid inclined section 212, which can be arranged in an arc shape or a flat surface, thereby reducing the risk of the corner of the flange 211 scratching the notch 221 and the stator teeth 220 during assembly, and reducing the foreign matter formed by scratching, thereby reducing the risk of foreign matter damaging the driving motor 13. Since the stator yoke 210, the flange 211 and the stator teeth 220 are usually made of silicon steel sheets or iron-cobalt alloy sheets, etc., the solid inclined section 212 is beneficial to reduce the metal foreign matter caused by scratching, thereby reducing the risk of metal foreign matter damaging the driving motor 13.

[0059] In some embodiments, referring to Figure 6The side surface of the notch 221 and the bottom surface of the notch 221 are connected with a mouth inclined section 222 corresponding to the solid inclined section 212; wherein the mouth inclined section 222 can be set as an arc shape or a flat surface. In this embodiment, the mouth inclined section 222 can improve the structural strength of the stator tooth 220 at the notch 221, reduce the risk of the stator tooth 220 being skewed and colliding with the protective paint of the coil 300 when the coil 300 is assembled, and is beneficial to improve the assembly yield and service life of the driving motor 13.

[0060] In some embodiments, referring to Figure 8 The side wall surface of the flange 211 abuts against the side wall surface of the notch 221, and the end surface of the stator tooth 220 abuts against the outer peripheral wall of the stator yoke 210, thereby respectively improving the connection stability between the stator tooth 220 and the stator yoke 210, respectively reducing the risk of the stator tooth 220 colliding with the protective paint of the coil 300, and respectively improving the assembly yield and service life of the driving motor 13.

[0061] Further, referring to Figure 8 The two oppositely arranged side wall surfaces of the flange 211 respectively abut against the side wall surface of the notch 221, thereby being beneficial to further improve the connection stability between the stator tooth 220 and the stator yoke 210, further reduce the risk of the stator tooth 220 colliding with the protective paint of the coil 300, and further improve the assembly yield and service life of the driving motor 13.

[0062] In some embodiments, referring to Figure 9 and Figure 10 The flange 211 comprises a first solid section 213 and a second solid section 214 arranged in sequence in the direction towards the motor rotor 100, for example Figure 9 and Figure 10 The first solid section 213 and the second solid section 214 are arranged in sequence in the right direction. The notch 221 comprises a first mouth section 223 and a second mouth section 224 arranged in sequence in the direction away from the stator yoke 210, for example Figure 9 and Figure 10 The first mouth section 223 and the second mouth section 224 are arranged in sequence in the right direction. Wherein, Figure 9 The dashed line in the above is used to show the boundary between the first solid section 213 and the second solid section 214, and the boundary between the first mouth section 223 and the second mouth section 224.

[0063] The first solid section 213 is arranged in the first mouth section 223, and the second solid section 214 is arranged in the second mouth section 224; the width of the first solid section 213 is smaller than the width of the second solid section 214, which can be understood as that the second solid section 214 is laterally protruding relative to the first solid section 213, for exampleFigure 9 and Figure 10 The average width of the first entity section 213 is less than the average width of the second entity section 214. The width of the first mouth section 223 is less than the width of the second mouth section 224, which can be understood as the second mouth section 224 protrudes laterally relative to the first mouth section 223, for example Figure 9 and Figure 10 The average width of the first mouth section 223 is less than the average width of the second mouth section 224. In addition, the second entity section 214 can be arranged to abut the second mouth section 224 on one side of the first entity section 213, for example Figure 9 The left side of the second entity section 214 abuts the second mouth section 224, which can reduce the risk of the stator tooth 220 coming outwards, and improve the operation stability of the drive motor 13.

[0064] In this embodiment, the notch 221 of the stator tooth 220 can be mounted on the flange 211 of the stator yoke 210 along the axial direction of the drive motor 13, for example, the notch 221 of the stator tooth 220 can be mounted on the flange 211 of the stator yoke 210 along the direction perpendicular to the plane of Figure 9 .

[0065] In some embodiments, referring to Figure 10 , the second entity section 214 includes an enlarged sub-section 215 connected with the first entity section 213, the width of the enlarged sub-section 215 increases in the direction away from the first entity section 213, for example, the outer side surface of the enlarged sub-section 215 is arranged as an inclined arc or a flat surface, for example Figure 10 The enlarged sub-section 215 is trapezoidal in shape. In this embodiment, the enlarged sub-section 215 reduces the stress concentration degree of the second entity section 214 on one side of the first entity section 213, reduces the risk of tearing and breaking of the flange 211, reduces the risk of the stator tooth 220 being skewed and hitting the protective paint of the coil 300, and is beneficial to improve the service life of the drive motor 13.

[0066] In some embodiments, referring to Figure 10 , the second entity section 214 further includes a flat sub-section 216, and the angle B formed by the flat sub-section 216 and the enlarged sub-section 215 on the outer side is greater than 180 degrees. The flat sub-section 216 can be understood as having a relatively flat outer side surface. The angle B formed by the flat sub-section 216 and the enlarged sub-section 215 on the outer side is greater than 180 degrees, which is beneficial to reduce the sharpness of the corners of the flange 211, reduce the foreign matter formed by scratching, and reduce the risk of foreign matter damaging the drive motor 13.

[0067] In the embodiment, the dashed line in Figure 10 is used to show the boundary between the first entity section 213 and the second entity section 214, and the boundary between the enlarged sub-section 215 and the flat sub-section 216.

[0068] In some embodiments, the stator teeth 220 and the stator yoke 210 are made of different magnetic conductive materials, thereby increasing the material selection range of the stator teeth 220 and the stator yoke 210, and improving the material selection convenience and overall manufacturing efficiency of the motor stator 200.

[0069] In some embodiments, the magnetic permeability of the stator teeth 220 is greater than that of the stator yoke 210. For example, the stator teeth 220 can be made of a soft magnetic material (such as iron-cobalt alloy instead of commonly used silicon steel sheet) with higher magnetic permeability but higher price, thereby improving the output torque of the driving motor 13; correspondingly, the stator yoke 210 can be made of a material with lower magnetic permeability but lower price, thereby reducing the overall cost of the driving motor 13.

[0070] In some embodiments, referring to Figure 11 , the number of the flanges 211 is greater than the number of the stator teeth 220, at least one stator tooth 220 is provided with at least two notches 221, and the at least two notches 221 on the same stator tooth 220 are respectively connected to the at least two flanges 211. For example, referring to Figure 11 , each stator tooth 220 is provided with two notches 221 corresponding to two flanges 211, which can be understood as that the ratio of the number of the flanges 211 to the number of the stator teeth 220 is equal to 2, thereby ensuring a certain structural strength of the stator teeth 220 at the notches 221 and improving the connection stability of the stator teeth 220. Of course, the ratio of the number of the flanges 211 to the number of the stator teeth 220 can also be set to other values greater than 1, which is not limited in the present embodiment.

[0071] In this embodiment, the at least two notches 221 on the same stator tooth 220 are respectively connected to the at least two flanges 211, thereby increasing the contact area of the stator teeth 220 and the flanges 211 and improving the connection stability of the stator teeth 220.

[0072] In some embodiments, referring to Figure 10 , at least one stator tooth 220 is provided with at least one notch 221, and the ratio of the total width of the notches 221 on the same stator tooth 220 to the width W21 of the stator tooth 220 is greater than or equal to 0.2 and less than or equal to 0.4. For example Figure 10 , the stator tooth 200 is provided with two notches 221, the total width of the notches 221 on the same stator tooth 220 is twice W22, and 0.2≤(2×W22) / W21≤0.4, thereby increasing the contact area of the stator teeth 220 and the flanges 211 and ensuring a certain structural strength of the stator teeth 220 at the notches 221, thereby further improving the connection stability of the stator teeth 220.

[0073] In some embodiments, referring toFigure 11 For at least two notches 221 on the same stator tooth 220, the ratio of the distance G between two adjacent notches 221 to the width W22 of the notch 221 is greater than or equal to 0.6 and less than or equal to 1.6, so that the solid part of the stator tooth 220 between the two adjacent notches 221 has higher structural strength, thereby further reducing the risk of the stator tooth 220 being skewed and hitting the protective paint of the coil 300, and facilitating to improve the service life of the driving motor 13.

[0074] In the related art, the end of the stator tooth 220 away from the motor rotor 100 is integrally arranged with the stator yoke 210, so that the connection between the end of the stator tooth 220 away from the motor rotor 100 and the stator yoke 210 usually needs to reserve a process fillet (the process fillet is shown by a dashed curve in Figure 11 ) or a process chamfer, thereby reducing the slot fill rate of the wire body 310 with a rectangular or rounded rectangular cross section.

[0075] In some embodiments, referring to Figure 11 , the side wall surface of the stator tooth 220 includes a flat section 225 and a terminal section 226 arranged in sequence in the direction away from the motor rotor 100 in the axial direction of the motor stator 200, wherein Figure 11 the dashed straight line in is used to represent the boundary line between the flat section 225 and the terminal section 226. The angle C formed by the tangent line of the end of the terminal section 226 toward the motor rotor 100 and the flat section 225 can be set to be less than or equal to 190 degrees.

[0076] In this embodiment, since the end of the stator tooth 220 away from the motor rotor 100 is separately arranged with the stator yoke 210, the end of the stator tooth 220 away from the motor rotor 100 can be processed to be relatively flat, which is conducive to improving the slot fill rate of the wire body 310 with a rectangular or rounded rectangular cross section, and is conducive to improving the output power of the driving motor 13.

[0077] Figure 12 In some embodiments, referring to , the ratio of the width W11 of the stator yoke 210 to the width W21 of the stator tooth 220 is greater than or equal to 0.4 and less than or equal to 1.3, thereby reducing the width of the stator yoke 210 to reduce the weight of the driving motor 13 while improving the structural strength of the stator yoke 210.

[0078] Figure 12 In some embodiments, referring to , the ratio of the width W11 of the stator yoke 210 to the width W12 of the flange 211 is greater than or equal to 1 and less than or equal to 5, thereby facilitating the flange 211 to have higher structural strength, thereby further reducing the risk of the stator tooth 220 being skewed and hitting the protective paint of the coil 300, and facilitating to improve the service life of the driving motor 13.

[0079] In some embodiments, referring to Figure 12 The two oppositely arranged side wall surfaces of the flange 211 abut against the side wall surfaces of the recess 221, and the recess 221 can move relative to the flange 211 in the radial direction of the rotor housing 110. It can be understood that the cooperation between the two oppositely arranged side wall surfaces of the flange 211 and the side wall surfaces of the recess 221 is relatively loose, and a slidable guide rail structure is formed between the flange 211 and the recess 221, thereby facilitating the adjustment of the installation position of the stator teeth 220 in the radial direction, reducing the installation error caused by the dimensional error of the stator teeth 220, and being beneficial to improve the motor performance of the drive motor 13.

[0080] In some embodiments, the top end of the flange 211 is spaced apart from the wall surface of the recess 221 and filled with a first filling and curing layer 227, thereby achieving the fixation between the stator teeth 220 and the stator yoke 210. In some embodiments, the stator teeth 220 and the stator yoke 210 are spaced apart and filled with a second filling and curing layer 228, thereby achieving the fixation between the stator teeth 220 and the stator yoke 210. The first filling and curing layer 227 and the second filling and curing layer 228 can be respectively set as the potting glue of the drive motor 13, thereby improving the connection stability between the stator teeth 220 and the stator yoke 210 through the curing of the potting glue, and simplifying the overall assembly process of the drive motor 13. Of course, the first filling and curing layer 227 and the second filling and curing layer 228 can also be set as industrial glue, etc., and the present embodiment does not limit this.

[0081] It can be understood that since the aircraft 10 and the vehicle adopt all the technical solutions of all the embodiments of the above-mentioned drive motor 13, at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments are possessed, which will not be repeated here.

[0082] The above only describes exemplary embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A drive motor, characterized in that, The drive motor is used in the aircraft, and the drive motor includes a motor rotor, a motor stator, and coils; The motor rotor includes a rotor housing and a number of permanent magnets with different magnetization directions. The permanent magnets are disposed on the surface of the rotor housing and arranged sequentially along the circumferential direction of the rotor housing. The magnetization directions of the permanent magnets are arranged sequentially according to a preset orientation relationship. The motor stator includes a stator yoke and at least two stator teeth spaced apart along the circumferential direction of the stator yoke. The stator teeth are disposed between the stator yoke and the motor rotor. The end of the stator tooth away from the motor rotor is separately disposed from and connected to the stator yoke. The coil is sleeved on the stator tooth. The stator yoke has at least two flanges on the side facing the stator teeth, and the flanges are spaced apart along the circumferential direction of the stator yoke; the end of the stator teeth facing the stator yoke has a notch, and the flange extends into the notch and is fixedly connected to the notch; At least one of the stator teeth is provided with at least one of the notches, and the ratio of the total width of the notches on the same stator tooth to the width of the stator tooth is greater than or equal to 0.2 and less than or equal to 0.4; The stator teeth and the stator yoke are made of different magnetically conductive materials.

2. The drive motor as described in claim 1, characterized in that, The sidewall of the flange abuts against the sidewall of the recess, and the end face of the stator tooth away from the motor rotor abuts against the outer peripheral wall of the stator yoke.

3. The drive motor as described in claim 1, characterized in that, The end of the stator tooth furthest from the motor rotor is bonded and fixed to the stator yoke; and / or The two opposite sidewalls of the flange abut against the sidewalls of the recess.

4. The drive motor as described in claim 1, characterized in that, The magnetization angle formed by the magnetization direction of the permanent magnet and the radial inward direction of the permanent magnet; the preset orientation relationship is set such that, along the circumferential direction of the rotor housing, the magnetization angle of each permanent magnet increases sequentially according to a preset incremental angle.

5. The drive motor as described in claim 4, characterized in that, The rotor housing is made of titanium alloy.

6. The drive motor as described in claim 1, characterized in that, The permeability of the stator teeth is greater than that of the stator yoke.

7. The drive motor as described in claim 1, characterized in that, The motor rotor is composed of the rotor housing and the permanent magnet.

8. The drive motor as described in claim 1, characterized in that, The motor rotor is sleeved outside the motor stator, and the permanent magnet is disposed on the inner surface of the rotor housing; the stator teeth have a lateral protrusion at one end facing the motor rotor, and the lateral protrusion is disposed on the side of the stator teeth in the height direction; The cross-section of the coil conductor is set as a rectangle, a rounded rectangle, or a circle, and part of the conductor is set in the interval between two adjacent stator teeth.

9. An aircraft, characterized in that, The aircraft includes a cockpit, a rotor mechanism, and a drive motor as described in any one of claims 1 to 8, the drive motor being mounted on the cockpit and being drively connected to the rotor mechanism to drive the rotor mechanism to rotate.

10. A means of transportation, characterized in that, The means of transportation includes the aircraft as described in claim 9.

11. A motor stator, characterized in that, The motor stator is used as a drive motor for an aircraft. The motor stator includes a stator yoke and at least two stator teeth spaced apart along the circumferential direction of the stator yoke. One end of each stator tooth is separately disposed from and connected to the stator yoke. The stator yoke has at least two flanges on the side facing the stator teeth, and the flanges are spaced apart along the circumferential direction of the stator yoke; the end of the stator teeth facing the stator yoke has a notch, and the flange extends into the notch and is fixedly connected to the notch; The stator yoke has at least two flanges on the side facing the stator teeth, and the flanges are spaced apart along the circumferential direction of the stator yoke; the end of the stator teeth facing the stator yoke has a notch, and the flange extends into the notch and is fixedly connected to the notch; At least one of the stator teeth is provided with at least one of the notches, and the ratio of the total width of the notches on the same stator tooth to the width of the stator tooth is greater than or equal to 0.2 and less than or equal to 0.4; The stator teeth and the stator yoke are made of different magnetically conductive materials.

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