Motor winding, motor and movable platform

Abstract

The utility model provides a motor winding, a motor and a movable platform, the motor winding comprises an iron core, a first coil and a second coil, and the iron core comprises a plurality of winding arms. The first coil is wound on at least one winding arm in the multiple winding arms, the first coil comprises a first port, and the first port can be used for allowing current to flow in or out of the first coil; the second coil is wound on the side, away from the winding arm, of the first coil, the second coil comprises a second port, and the second port can be used for allowing current to flow in or out of the second coil; wherein the first port and the second port are connected in parallel. According to the motor winding provided by the invention, the total resistance of the first coil and the second coil which are connected in parallel is smaller than the resistance of only adopting the first coil or only adopting the second coil under the same winding condition, and the total heating value of the first coil and the second coil which are arranged on the winding arm in parallel is small; the working efficiency of the motor winding is improved, and the working safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to motor windings, motors, and movable platforms. Background Technology

[0002] The motor provides the power required for the movement of the mobile platform and the driving force required to perform actions. Therefore, the performance of the motor is related to the overall mobility and operational efficiency of the mobile platform.

[0003] In existing motors, the winding slots are not fully filled during winding, resulting in low space utilization within the slots. To improve the slot fill factor, thinner wires are typically used, which increases the resistance of the windings within the slots, leading to increased heat generation and reduced motor efficiency. Utility Model Content

[0004] In view of this, the present invention proposes a motor winding, a motor and a movable platform, which aims to achieve a certain slot fill factor for the entire motor winding while minimizing heat generation.

[0005] The first aspect of this utility model discloses a motor winding comprising: an iron core including a plurality of winding arms; a first coil wound on at least one of the plurality of winding arms, the first coil including a first port for supplying current into or out of the first coil; and a second coil wound on the side of the first coil away from the winding arms, the second coil including a second port for supplying current into or out of the second coil; wherein the first port and the second port are connected in parallel.

[0006] As can be seen from the above technical solution, in the motor winding proposed in the first aspect of this utility model, the first coil is wound tightly against the surface of the winding arm, while the second coil is wound and sleeved on the outside of the first coil, so that the required number of turns of coil are wound on the same winding arm, and the winding slots between adjacent winding arms have a certain slot fill factor. Since the first coil and the second coil are arranged in parallel, the total resistance of the first coil and the second coil after parallel arrangement is smaller than the resistance of using only the first coil or only the second coil under the same winding conditions. Therefore, the total heat generation of the first coil and the second coil arranged in parallel on the winding arm is small, which is beneficial to improving the working efficiency of the motor winding and improving the safety during operation.

[0007] The motor proposed in the second aspect of this utility model includes the motor windings described in any of the foregoing embodiments.

[0008] As can be seen from the above technical solution, the motor proposed in the second aspect of this utility model, having the aforementioned motor winding, also possesses the beneficial effects of a motor winding, which can improve the working efficiency of the motor and enhance the safety of the motor during operation.

[0009] The movable platform proposed in the third aspect of this utility model includes the motor of the aforementioned embodiments.

[0010] As can be seen from the above technical solutions, the movable platform proposed in the third aspect of this utility model, having the aforementioned motor, also possesses the beneficial effects of the aforementioned motor, and can improve the mobility efficiency of the movable platform or the execution efficiency of the execution components.

[0011] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the disclosure of the embodiments of this utility model. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the motor winding after the first coil is wound on each winding arm according to some embodiments of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of a motor winding after the first coil and the second coil are wound on each winding arm according to some embodiments of this utility model;

[0015] Figure 3 This is a schematic diagram of the transverse cross section of the winding arm after the first coil and the second coil are wound on it according to some embodiments of this utility model, wherein the cross-sectional area of ​​the second coil is larger than that of the first coil;

[0016] Figure 4 This is a schematic diagram of the transverse cross-section of the winding arm after the first coil and the second coil are wound on it according to some embodiments of the present invention, wherein the cross-sectional shape of the first coil is elliptical and the cross-sectional shape of the second coil is circular.

[0017] Figure 5 This is a schematic diagram of the transverse cross section of the winding arm after the first coil and the second coil are wound on it according to some embodiments of this utility model, wherein the first coil and the second coil are made of different materials;

[0018] Figure 6 This is a schematic diagram of the motor's structure;

[0019] Figure 7 This is a structural diagram of a mobile platform.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Motor windings;

[0022] 10. Iron core; 11. Winding arm;

[0023] 20. First coil;

[0024] 21. First port;

[0025] 211a, First inflow port; 211b, Second inflow port; 211c, Third inflow port;

[0026] 22. Third port;

[0027] 212a, First outgoing port; 212b, Second outgoing port; 212c, Third outgoing port;

[0028] 30. Second coil;

[0029] 31. Second port;

[0030] 311a, Fourth inflow port; 311b, Fifth inflow port; 311c, Sixth inflow port;

[0031] 32. Fourth port;

[0032] 312a, Fourth outgoing port; 312b, Fifth outgoing port; 312c, Sixth outgoing port;

[0033] 1000, Electric motor;

[0034] 4000, mobile platform; 4100, fuselage. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0036] In existing motors, during the winding process, taking copper wire as an example, the larger the diameter of the copper wire, the larger the gap between the copper wires, resulting in lower space utilization. A larger copper wire diameter also requires greater tension during winding, making tight arrangement more difficult. It is evident that thicker wire coils result in insufficient filling and low space utilization within the winding slots. To improve slot fill factor, thinner wire coils, such as thinner copper wire, are often used. This increases the overall resistance of the winding within the slot, leading to increased motor heat generation and reduced motor efficiency.

[0037] Therefore, this application proposes a motor winding 100 that achieves a certain slot fill factor while generating little heat.

[0038] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a motor winding 100, including: an iron core 10, a first coil 20, and a second coil 30. The iron core 10 in this application can be a rotor core or a stator core; no limitation is made here.

[0039] The iron core 10 includes multiple winding arms 11, which can be two or more. For example, it can have two winding arms 11, four winding arms 11, six winding arms 11, eight winding arms 11, twelve winding arms 11, eighteen winding arms 11, etc.

[0040] For example, such as Figure 1 As shown, there are a total of 12 winding arms 11. The first coil 20 is wound on at least one of the winding arms 11. The first coil 20 directly contacts the surface of the winding arm 11 and is wound on the winding arm 11. The winding method can be flexibly selected according to the situation.

[0041] Furthermore, such as Figure 1 As shown, the first coil 20 includes a first port 21, which can be used to allow current to flow into or out of the first coil 20. That is, the first port 21 can be connected to the power supply terminal of a power source to provide the current required for the first coil 20 to operate; alternatively, the first port 21 can also be connected to the loop end of a circuit to allow current to flow back in the first coil 20. In some embodiments, the first coil 20 may further include a third port 22, corresponding to the first port 21. When the first port 21 includes a current inflow port, the third port 22 includes a current outflow port; when the first port 21 includes a current outflow port, the third port 22 includes a current inflow port. In some examples in this application, such as... Figure 1As shown, the first coil 20 includes at least one port of the first port 21, such as the first inflow port 211a, and the first coil 20 also includes at least one port of the third port 22, such as the first outflow port 212a.

[0042] In some embodiments, the motor winding 100 may be divided into multiple sub-windings, each sub-winding including at least one winding arm 11. For example, please refer to... Figure 1 The motor winding 100 can be divided into three sub-windings, each including four winding arms 11. The first port 21 through which the current flows into the first sub-winding a is designated as the first inflow port 211a, and the third port 22 through which the current flows out of the first sub-winding a is designated as the first outflow port 212a. Similarly, the first port 21 through which the current flows into the second sub-winding b is designated as the second inflow port 211b, and the third port 22 through which the current flows out of the second sub-winding b is designated as the second outflow port 212b. Likewise, the first port 21 through which the current flows into the third sub-winding c is designated as the third inflow port 211c, and the third port 22 through which the current flows out of the third sub-winding c is designated as the third outflow port 212c. It should be understood that the number of sub-windings can be any suitable number, which will not be elaborated upon here.

[0043] like Figure 2 As shown, the second coil 30 is wound on the side of the first coil 20 away from the winding arm 11. That is, the second coil 30 is sleeved on the outer surface of the first coil 20. The second coil 30 is further away from the surface of the winding arm 11 in the axial direction of the iron core 10 than the first coil 20.

[0044] Furthermore, such as Figure 2 As shown, the second coil 30 includes a second port 31, which can be used to allow current to flow into or out of the second coil 30; that is, the second port 31 can be connected to the power supply terminal of a power source to provide the current required for the operation of the second coil 30, or the second port 31 can be connected to the return terminal of a line to allow the current in the second coil 30 to flow back. In some embodiments, the second coil 30 may also include a fourth port 32, corresponding to the second port 31. When the second port 31 includes a current inflow port, the fourth port 32 includes a current outflow port; when the second port 31 includes a current outflow port, the fourth port 32 includes a current inflow port. In some examples in this application, such as... Figure 2 As shown, the second coil 30 includes at least one port of the second port 31, such as the fourth inflow port 311a, and the second coil 30 also includes at least one port of the fourth port 32, such as the fourth outflow port 312a.

[0045] Furthermore, in some embodiments, similar to the case of the first coil 20 described above, the motor winding 100 can also be divided into multiple sub-windings for the second coil 30, each sub-winding including at least one winding arm 11. For example, please refer to... Figure 2 The motor winding 100 can be divided into three sub-windings, each including four winding arms. The second port 31 into which the current flows into the first sub-winding a is designated as the fourth inflow port 311a, and the fourth port 32 out of the first sub-winding a is designated as the fourth outflow port 312a. Similarly, the second port 31 into which the current flows into the second sub-winding b is designated as the fifth inflow port 311b, and the fourth port 32 out of the second sub-winding b is designated as the fifth outflow port 312b. Likewise, the second port 31 into which the current flows into the third sub-winding c is designated as the sixth inflow port 311c, and the fourth port 32 out of the third sub-winding c is designated as the sixth outflow port 312c. It should be understood that the number of sub-windings can be any suitable number, which will not be elaborated upon here.

[0046] The first port 21 and the second port 31 mentioned above are connected in parallel. That is to say, the first coil 20 and the second coil 30 are connected in parallel throughout the circuit.

[0047] As can be seen from the above technical solution, in the motor winding 100 proposed in the first aspect of this utility model, the first coil 20 is wound close to the surface of the winding arm 11, while the second coil 30 is wound and sleeved on the outside of the first coil 20, so that the required number of turns of the coil are wound on the same winding arm 11, and the winding slots between adjacent winding arms 11 have a certain slot fill factor.

[0048] Furthermore, since the first coil 20 and the second coil 30 of this application are connected in parallel, the total resistance of the first coil 20 and the second coil 30 after parallel connection is smaller than the resistance of using the first coil 20 alone or the second coil 30 alone under the same winding conditions. Therefore, the total heat generation of the first coil 20 and the second coil 30 connected in parallel on the winding arm 11 is smaller, which is beneficial to improving the working efficiency of the motor winding 100 and improving the safety during operation.

[0049] Understandably, compared to the prior art which uses fine wire diameter coils wound on the winding arm 11, resulting in greater resistance and more heat generation, the solution of this application, which uses the first coil 20 and the second coil 30 connected in parallel under the same winding conditions, can reduce the total resistance of the coils, thereby reducing the total heat generation and improving the working efficiency of the motor winding 100.

[0050] In the example of this application, the main body of both the first coil 20 and the second coil 30 includes a conductor and an insulator covering the outside, thereby avoiding short circuits between the two coils during the winding process and ensuring that the two coils are connected in parallel only at the first port 21 and the second port 31.

[0051] During use, when the first coil 20 and the second coil 30 connected in parallel are wound on the same winding arm 11, the first coil 20 located on the inner ring and the second coil 30 located on the outer ring may generate a certain circulating current due to the difference in resistance, which will aggravate the heat generation and loss of some coils, and thus affect the normal operation of the motor winding 100.

[0052] Therefore, in this application, the first coil 20 and the second coil 30 have the same resistance on the same winding arm 11. That is, the resistance of the first coil 20 located on the inner winding and the resistance of the second coil 30 located on the outer winding are the same, thereby reducing the generation of circulating current, reducing additional losses, and further improving the performance of the motor 1000. Since the first coil 20 and the second coil 30 are connected in parallel, the magnitude of the current passing through them is the same. And since the resistance of the first coil 20 and the second coil 30 located on the same winding arm 11 is the same, the voltage of the first coil 20 and the second coil 30 located on the same winding arm 11 is the same. This makes the difference in inductance between the first coil 20 and the second coil 30 small, the back electromotive force of each parallel branch small, and the current of each parallel branch relatively balanced.

[0053] In some embodiments, such as Figure 3As shown, the cross-sectional area of ​​the second coil 30 is larger than that of the first coil 20. Therefore, by using two coils of different diameters, the first coil 20 and the second coil 30 can have more turns wound on the winding arm 11 compared to using a thicker coil, thus increasing the slot fill factor of the winding slots between the winding arms 11. Furthermore, since the first coil 20 is wound on the surface of the winding arm 11, the winding path it traverses during winding is close to the outer circumference of the winding arm 11; while the second coil 30 is wound on the surface of the first coil 20, the winding path it traverses during winding is longer than that of the first coil 20. Each turn of the second coil 30 is close to the circumference of the sum of the outer diameter of the winding arm 11 and the outer diameter of the first coil 20. Therefore, after the second coil 30 has more turns, the second coil 30 located on the same winding arm 11 will have a longer conductor length. According to the law of resistance, in order to design the resistance of the second coil 30 to be the same as that of the first coil 20, in these examples where the first coil 20 and the second coil 30 are made of the same material, the cross-sectional area of ​​the second coil 30 located on the outer ring can be designed to be larger, while the cross-sectional area of ​​the first coil 20 located on the inner ring can be designed to be smaller. This allows the first coil 20 and the second coil 30 with the same or approximately the same resistance to be obtained on the same winding arm 11, thereby reducing the circulating current generated between the first coil 20 and the second coil 30 that are connected in parallel on the same winding arm 11.

[0054] In some embodiments, the cross-sectional shape of the first coil 20 and the second coil 30 includes at least one of circular, rectangular, elliptical or irregular shapes, which can be flexibly selected according to the actual situation; circular wires are convenient for winding; elliptical and rectangular wires can be regarded as flat wires, which can increase the number of turns when winding the coil.

[0055] For example, such as Figure 3 As shown, the cross-sectional shape of the first coil 20 and the second coil 30 are both circular, and the diameter of the second coil 30 is larger than the diameter of the first coil 20. In these examples, the first coil 20 and the second coil 30 with circular cross-sections are convenient to wind, and the second coil 30 with a larger diameter has a larger overall cross-section than the first coil 20 with a smaller diameter. It can also be regarded as the wire diameter of the second coil 30 being larger and the second coil 30 being thicker. According to the law of resistance, when the first coil 20 and the second coil 30 are made of the same material, the cross-sectional area of ​​the second coil 30 is larger and the wire length is longer during the winding process; the cross-sectional area of ​​the first coil 20 is smaller and the wire length is shorter during the winding process. Therefore, under certain equilibrium conditions, the resistance of the first coil 20 and the resistance of the second coil 30 wound on the same winding arm 11 will be the same.

[0056] For example, such as Figure 4As shown, the cross-sectional shape of the first coil 20 is elliptical, and the cross-sectional shape of the second coil 30 is circular. The radius of the cross-section of the second coil 30 is greater than the length of the major semi-axis of the cross-section of the first coil 20. Therefore, the cross-section of the second coil 30 will also be larger than that of the first coil 20, making the second coil 30 thicker. Similarly, according to the law of resistance, when the first coil 20 and the second coil 30 are made of the same material, the cross-sectional area of ​​the second coil 30 is larger and the wire length during winding is longer; the cross-sectional area of ​​the first coil 20 is smaller and the wire length during winding is shorter. Therefore, under certain equilibrium conditions, the resistance of the first coil 20 and the resistance of the second coil 30 wound on the same winding arm 11 will be the same.

[0057] Of course, in other examples, the materials used for the first coil 20 and the second coil 30 can be different. By simultaneously adjusting the cross-section of the second coil 30 and based on the winding length generated during its winding process and the resistivity of the selected material, the resistance of the second coil 30 can be obtained. Similarly, the resistance of the first coil 20 can be obtained in real time. By adjusting the resistance of the first coil 20 and the resistance of the second coil 30 to be the same, the resistance of the first coil 20 and the resistance of the second coil 30 wound on the same winding arm 11 in this application can be made the same, thereby reducing the circulating current phenomenon.

[0058] In some embodiments, such as Figure 5 As shown, the resistivity of the second coil 30 is less than that of the first coil 20. Therefore, with the cross-sectional areas of both coils remaining constant, choosing a material with lower resistivity when the wire length of the second coil 30 is longer can balance the resistance change caused by the increased wire length during winding. Of course, in other examples, the material and cross-section of the second coil 30 can be changed simultaneously to balance the resistance change caused by the change in wire length during winding.

[0059] In some embodiments, the first coil 20 and the second coil 30 are made of different materials, which results in different resistivities between them.

[0060] In optional examples, the materials of the first coil 20 and the second coil 30 are selected from two of aluminum, copper, silver, gold, and metal alloys. The resistivity of these materials is arranged in the following order: silver < copper < gold < aluminum. For metal alloys, readily available alloy wires can be used; there are no restrictions. For example, when the first coil 20 is made of copper, the second coil 30 can be made of silver or a copper-silver alloy. As another example, when the first coil 20 is made of aluminum, the second coil 30 can be made of copper. When selecting materials, factors such as cost and the metal's ductility for ease of winding must also be considered.

[0061] In order to further reduce the circulating current phenomenon between the first coil 20 and the second coil 30, in some embodiments of this application, the first coil 20 and the second coil 30 have the same number of turns wound on the same winding arm 11, so that the winding conditions of the first coil 20 and the second coil 30 are basically similar, and the wire length of the second coil 30 and the wire length of the first coil 20 will not be longer due to the different number of turns wound.

[0062] To further reduce the circulating current between the first coil 20 and the second coil 30, in some embodiments of this application, the first coil 20 and the second coil 30 extend in the same winding arm 11. Therefore, the potentials generated by the two coils are close, and the directions of the electromagnetic forces they produce are also close, which helps to further balance the electrical forces between the first coil 20 and the second coil 30, reducing the occurrence of circulating current. For example, in a specific example... Figure 1 As shown, the first coil 20 begins winding around the entire winding arm 11 from the side closest to the central axis of the iron core 10, until the first coil 20 has wound a predetermined number of turns, after which it enters another winding arm 11 to begin winding. The second coil 30 is wound on the surface of the first coil 20 following the winding direction of the first coil 20, thereby making the winding of the two coils as similar as possible. Of course, in other examples, the winding directions of the first coil 20 and the second coil 30 may differ slightly, which is not a limitation here.

[0063] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, multiple winding arms 11 are divided into multiple groups, such as two groups, three groups, or more groups. The number of first coils 20 and the number of second coils 30 are the same as the number of groups of winding arms 11. Multiple groups of first coils 20 are wound with a preset number of turns on different winding arms 11, and multiple groups of second coils 30 are wound with a preset number of turns on the surface of the corresponding first coil 20. The multiple groups of second coils 30 and the multiple groups of first coils 20 are set in a one-to-one correspondence. In these examples, the motor winding 100 can be used for a multi-phase motor by grouping the winding arms 11.

[0064] In a specific example, motor winding 100 is used in motor 1000, which is a three-phase motor. The three-phase motor includes three sets of coils, each set including a first coil 20 and a second coil 30. The first coil 20 and the second coil 30 in each set have the same number of turns, thus ensuring that the winding conditions of the first coil 20 and the second coil 30 in each set are approximately similar. Figure 2As shown, the iron core 10 includes 12 winding arms 11, labeled 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12. These 12 winding arms 11 are divided into three groups: A, a; B, b; and C, c. Each group has four winding arms 11, and each group's four winding arms 11 are further divided into two winding arms 11 for connecting to the power supply current terminal and two winding arms 11 for connecting to the output current terminal. The motor winding 100 is divided into three sub-windings: the first sub-winding a has four winding arms 11, labeled A, a, A, a; the second sub-winding b has four winding arms 11, labeled B, b, B, b; and the third sub-winding c has four winding arms 11, labeled C, c, C, c. Figure 1 As shown, the first group of first coils 20 is wound on the two winding arms 11 of A and a in the figure, and then wound around the middle of the iron core 10 on the other side of the two winding arms 11 of A and a. The second group of first coils 20 is wound on the two winding arms 11 of B and b in the figure, and then wound around the middle of the iron core 10 on the other side of the two winding arms 11 of B and b. The third group of first coils 20 is wound on the two winding arms 11 of C and c in the figure, and then wound around the middle of the iron core 10 on the other side of the two winding arms 11 of C and c. Thus, after the three groups of first coils 20 are wound, the first inflow port 211a, the second inflow port 211b, the third inflow port 211c, the first outflow port 212a, the second outflow port 212b, and the third outflow port 212c will be left open. Similarly, as... Figure 2As shown, the second coil 30 also employs three groups. Each group of second coils 30 follows the winding method of the first coil 20, being wound on the surface of the first coil 20 on each group of winding arms 11. Thus, after the three groups of second coils 30 are wound, a fourth inflow port 311a, a fifth inflow port 311b, a sixth inflow port 311c, a fourth outflow port 312a, a fifth outflow port 312b, and a sixth outflow port 312c will be left open. The first inflow port 211a and the fourth inflow port 311a are located on the same side and connected in parallel. The first outflow port 212a and the fourth outflow port 312a are located on the same side and connected in parallel, thereby enabling the first group of first coils 20 and second coils 30 to be wound in parallel. Coils 30 are connected in parallel within the motor winding 100; the second inflow port 211b and the fifth inflow port 311b are located on the same side and connected in parallel, and the second outflow port 212b and the fifth outflow port 312b are located on the same side and connected in parallel, thus achieving a parallel connection of the second group of first coils 20 and second coils 30 within the motor winding 100; the third inflow port 211c and the sixth inflow port 311c are located on the same side and connected in parallel, and the third outflow port 212c and the sixth outflow port 312c are located on the same side and connected in parallel, thus achieving a parallel connection of the third group of first coils 20 and second coils 30 within the motor winding 100. Therefore, three groups of first coils 20 and second coils 30 connected in parallel are obtained, enabling the operation of a three-phase motor after energization. Of course, in other examples, the winding arm 11 can be divided into other groups, and the motor 1000 can also be a single-phase motor or other types of motors, which will not be elaborated here.

[0065] In a specific example, the three-phase motor adopts the following structure and winding method: the structure adopted is that the first coil 20 and the second coil 30 are wound on the winding arm 11 using copper wires of different diameters, so that the parallel resistance of the two copper wires of different diameters is greater than the resistance of a single copper wire; the winding parameters are adjusted to achieve resistance balance, so that the total resistance R of the two copper wires R1 and R2 after parallel connection is less than the resistance R1 or R2 of a single thick wire.

[0066] The two coils, first coil 20 and second coil 30, are connected in parallel as follows:

[0067] 1. Use copper wire with a diameter of D1 for winding. Figure 1 The three sets of first coils 20 located in the inner layer are shown. They use a winding tension T1, a copper wire length of L1, a winding number of turns M, and a copper wire resistance of D1.

[0068] 2. Use copper wire with a diameter of D2 for winding. Figure 2 The three sets of second coils 30 located on the outer layer are shown. They use a winding tension T2, a copper wire length of L2, a winding number of turns M, and a copper wire resistance of D2.

[0069] 3. Keep the number of turns of copper wire with diameter D1 and copper wire with diameter D2 consistent. By adjusting the copper wire diameters D1 and D2, the copper wire lengths L1 and L2, and the winding tension T1 and T2, make the resistance R1 of the first coil 20 in the inner layer equal to the resistance R2 of the second coil 30 in the outer layer, so that the heat generation of the two layers of copper wire is the same.

[0070] 4. The resistance R of R1 and R2 connected in parallel is lower than the resistance R1 or R2 of a single copper wire. This results in a lower total resistance for motor 1000, lower heat generation after parallel connection, higher efficiency, higher slot fill factor, and a larger copper wire distribution area within the slots. Therefore, compared to traditional motor winding schemes that use thicker wire coils to reduce resistance, leading to a low slot fill factor, this embodiment solves the problem of insufficient slot filling and low space utilization in motor winding 100. It also addresses the issue of high winding resistance due to the inability to fill the slots with thicker, lower-resistance copper wire, thus reducing heat generation and improving working efficiency in motor 1000 using the motor winding 100 of this application.

[0071] The motor 1000 of this application will now be described.

[0072] Combination Figure 2 and Figure 6 As shown, this application proposes a motor 1000, including the motor winding 100 of the aforementioned embodiments.

[0073] As can be seen from the above technical solutions, the motor 1000 proposed in this application, having the aforementioned motor winding 100, also possesses the beneficial effects of the motor winding 100: reduced heat generation, improved working efficiency, and enhanced safety during operation.

[0074] The mobile platform 4000 of this application will now be described.

[0075] like Figure 7 As shown, this application proposes a mobile platform 4000, including the motor 1000 of the aforementioned embodiment. The mobile platform 4000 can be an aircraft (including but not limited to manned or unmanned aircraft), a vehicle, a ship, a robot, etc. The aircraft can include multi-rotor aircraft, fixed-wing aircraft, and aircraft combining rotor and fixed wings. The mobile platform 4000 can also be an amphibious mobile platform 4000, such as a flying car. The aircraft can include industrial aircraft, agricultural aircraft, logistics aircraft, aerial photography aircraft, etc.

[0076] As can be seen from the above technical solutions, the movable platform 4000 proposed in the third aspect of this application, having the aforementioned motor 1000, also possesses the beneficial effects of the aforementioned motor 1000, which can improve the mobility efficiency of the movable platform 4000 or the execution efficiency of the execution components.

[0077] When the mobile platform 4000 is a drone, the motor 1000 can be used as a component to drive the rotation of the propeller blades, thereby enabling the drone to take off, land, or change direction, and making the drone's flight efficiency higher and flight safer. In a specific example, the motor 1000 is located on the drone's fuselage 4100, for example, it can be located on the arm of the fuselage 4100. Multiple motors 1000 can be installed on the fuselage 4100.

[0078] When the mobile platform 4000 is a robot, the motor 1000 can be used to drive a component of the robot to operate, thereby improving the robot's execution efficiency and extending its continuous execution time.

[0079] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A motor winding, characterized in that, include: The iron core includes multiple winding arms; A first coil is wound on at least one of the plurality of winding arms, the first coil including a first port that can be used to allow current to flow into or out of the first coil. A second coil is wound on the side of the first coil away from the winding arm. The second coil includes a second port that can be used to allow current to flow into or out of the second coil. The first port and the second port are connected in parallel.

2. The motor winding as described in claim 1, characterized in that, The first coil and the second coil have the same resistance on the same winding arm.

3. The motor winding as described in claim 2, characterized in that, The cross-sectional area of ​​the second coil is greater than that of the first coil.

4. The motor winding as described in claim 3, characterized in that, The cross-sectional shape of the first coil and the second coil includes at least one of circular, rectangular, elliptical or irregular shapes.

5. The motor winding as described in claim 4, characterized in that, Both the first coil and the second coil have circular cross-sectional shapes, and the diameter of the second coil is larger than the diameter of the first coil.

6. The motor winding as described in claim 4, characterized in that, The first coil has an elliptical cross-section, the second coil has a circular cross-section, and the radius of the second coil's cross-section is greater than the length of the major semi-axis of the first coil's cross-section.

7. The motor winding as described in claim 2, characterized in that, The resistivity of the second coil is less than that of the first coil.

8. The motor winding as described in claim 7, characterized in that, The first coil and the second coil are made of different materials.

9. The motor winding as described in claim 8, characterized in that, The materials of the first coil and the second coil are selected from two of the following: aluminum, copper, silver, gold, and metal alloys.

10. The motor winding as described in claim 2, characterized in that, The first coil and the second coil have the same number of turns wound on the same winding arm.

11. The motor winding as described in claim 2, characterized in that, The first coil and the second coil extend in the same direction on the same winding arm.

12. The motor winding as described in claim 1, characterized in that, The multiple winding arms are divided into multiple groups, and the number of the first coil and the number of the second coil are the same as the number of groups of winding arms. The multiple groups of first coils are wound with a preset number of turns on different winding arms, and the multiple groups of second coils are wound with a preset number of turns on the surface of the corresponding first coil. The multiple groups of second coils and the multiple groups of first coils are arranged in a one-to-one correspondence.

13. The motor winding as described in claim 1, characterized in that, The motor winding is used in the motor, which is a three-phase motor. The three-phase motor includes three sets of coils, each set of coils including a first coil and a second coil, and the first coil and the second coil in each set have the same number of turns.

14. An electric motor, characterized in that, Includes the motor winding as described in any one of claims 1 to 13.

15. A mobile platform, characterized in that, Including the motor as described in claim 14.

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