12-slot 10-pole four-layer stator flat wire wave winding structure applied to unmanned aerial vehicle driving motor

Abstract

The utility model discloses a 12-slot 10-pole four-layer stator flat wire wave winding structure applied to a driving motor of an unmanned aerial vehicle. The 12-slot 10-pole four-layer stator flat wire wave winding structure comprises slots 1-12 and 24 coils, 24 coils are wound on a circular stator iron core punching sheet with slots 1 to 12 in the inner side in a three-phase parallel connection mode, the number of turns of the coils is 1, the number of conductor layers in each slot is 4, three phases are an A phase, a B phase and a C phase, and each phase winding is provided with a first branch, a second branch, a third branch and a fourth branch; according to the utility model, a four-layer stator flat wire wave winding structure is constructed by adopting two different pitch combination modes of spanning one slot and spanning four slots; the winding is simple and compact in form, good in process manufacturability, suitable for batch application, capable of effectively improving the utilization rate in the groove and the heat dissipation capability of the motor, and suitable for a high-power low-voltage large-current unmanned aerial vehicle driving motor.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor manufacturing, and particularly relates to a 12-slot 10-pole 4-layer stator flat wire wave winding structure applied to a driving motor of an unmanned aerial vehicle (UAV). Background Technique

[0002] As a new economic format, the low-altitude economy features core characteristics of new quality productivity such as high-tech leadership, high-efficiency operation, and high-quality development, and has broad development prospects. It is an important layout for China to seize development opportunities, promote high-quality development, and establish a modern industrial system.

[0003] UAVs will become the first low-altitude economic industrial chain to be implemented. The domestic industrial UAV market space is expected to reach 150 billion yuan in 2024, and the demand in fields such as express logistics is expected to increase rapidly. The drive motor system is a core performance component of UAVs. As performance indicators such as the maximum load and full-load flight range of UAVs continue to rise, the requirements for the drive motor in terms of output torque and space volume limitations are becoming increasingly stringent. Currently, UAV motors mainly adopt the design scheme of outer-rotor brushless motors, with power ranging from dozens of watts to thousands of watts. The stator winding generally adopts a left-right double-layer fractional-slot concentrated winding structure, and common slot-pole combinations include 12 / 10, 12 / 8, 12 / 14, 24 / 20, etc. However, the fractional-slot concentrated winding structure has a low slot fill factor, and the winding using round wire conductors has insufficient heat dissipation capacity.

[0004] Since flat wire wave winding motors can significantly improve the slot fill factor and heat dissipation capacity of motors, more and more flat wire motors are applied to new energy vehicle drive systems, but currently they are rarely used in UAV drive motors. With the increasing requirements for the space and volume of UAVs and the increasingly mature manufacturing process of flat wire wave windings, flat wire wave windings have broad application prospects in UAV drive motor systems. Therefore, it is necessary to provide a new 12-slot 10-pole stator flat wire wave winding structure. Content of the Utility Model

[0005] The utility model provides a 12-slot 10-pole 4-layer stator flat wire wave winding structure applied to a driving motor of an unmanned aerial vehicle, which overcomes the problems of low slot fill factor and insufficient heat dissipation capacity in the existing stator winding technology of UAV motors.

[0006] To solve the above problems, the technical solutions provided by the utility model are as follows:

[0007] An embodiment of the utility model provides a 12-slot 10-pole 4-layer stator flat wire wave winding structure applied to a driving motor of an unmanned aerial vehicle, which includes slots No. 1 to No. 12 and 24 coils;

[0008] Twenty-four coils are wound around a circular stator core punching sheet with slots numbered 1 to 12 on the inner side in a three-phase parallel connection manner. The number of turns of the coil is 1, the number of conductor layers in each slot is 4, the three phases are phase A, phase B, and phase C, and each phase winding has a first branch, a second branch, a third branch, and a fourth branch;

[0009] Among them, in the winding structure of the 4-layer coil, in the A-phase winding, on the first branch, the first-layer conductor in slot 1 straddles 1 slot and is combined with the second-layer conductor to form 1 coil, and the first-layer conductor in slot 6 straddles 1 slot and is combined with the second-layer conductor to form 1 coil. These two coils are connected together straddling 4 slots; on the second branch, the third-layer conductor in slot 1 straddles 1 slot and is combined with the fourth-layer conductor to form 1 coil, and the third-layer conductor in slot 6 straddles 1 slot and is combined with the fourth-layer conductor to form 1 coil. These two coils are connected together straddling 4 slots; on the third branch, the first-layer conductor in slot 7 straddles 1 slot and is combined with the second-layer conductor to form 1 coil, and the first-layer conductor in slot 12 straddles 1 slot and is combined with the second-layer conductor to form 1 coil. These two coils are connected together straddling 4 slots; on the fourth branch, the third-layer conductor in slot 7 straddles 1 slot and is combined with the fourth-layer conductor to form 1 coil, and the third-layer conductor in slot 12 straddles 1 slot and is combined with the fourth-layer conductor to form 1 coil. These two coils are connected together straddling 4 slots. One phase has 8 coils.

[0010] According to an optional embodiment of the present invention, the induced electromotive forces generated by the first branch, the second branch, the third branch, and the fourth branch are equal in magnitude and phase, and the head and tail of each branch are connected in series or in parallel.

[0011] According to an optional embodiment of the present invention, the B-phase winding is obtained by rotating 4 slot numbers in the direction of increasing slot numbers relative to the A-phase winding; the C-phase winding is obtained by rotating 8 slot numbers in the direction of increasing slot numbers relative to the A-phase winding.

[0012] Compared with the prior art, the embodiment of the present invention provides a 12-slot 10-pole 4-layer stator flat wire wave winding structure applied to a drone drive motor, which has the following beneficial effects: In the 12-slot 10-pole stator flat wire wave winding, the coils of the present invention adopt a combination of two different pitches of 1 slot and 4 slots. The winding adopts a four-layer flat wire structure, the number of conductor layers in each slot is 4, and the number of turns of the coil is 1. This winding significantly improves the slot fill factor and heat dissipation capacity of the motor. In addition, the winding structure is simple and compact, and has good process manufacturability, which is suitable for batch application of drone drive motors. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the conductor distribution in the slots of a 12-slot 10-pole 4-layer stator flat wire wave winding provided by an embodiment of the present application.

[0015] Figure 2 It is a schematic diagram of the four-branch windings of phase A of a 12-slot 10-pole 4-layer stator flat wire wave winding provided by an embodiment of the present application.

[0016] Figure 3 It is a schematic diagram of the structure of the four branches of phase A of a 12-slot 10-pole 4-layer stator flat wire wave winding provided by an embodiment of the present application.

[0017] Figure 4 It is a schematic diagram of the single-branch structure connection of the three-phase windings of a 12-slot 10-pole 4-layer stator flat wire wave winding provided by an embodiment of the present application. Detailed implementation manners

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0019] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the embodiment of the present utility model provides a 12-slot 10-pole 4-layer stator flat wire wave winding structure applied to an unmanned aerial vehicle drive motor, including slot No. 1, slot No. 2, slot No. 3, slot No. 4, slot No. 5, slot No. 6, slot No. 7, slot No. 8, slot No. 9, slot No. 10, slot No. 11, slot No. 12 and 24 coils.

[0020] As Figure 1 and Figure 2As shown, 24 coils are wound around a circular stator core punching sheet with slots numbered 1 to 12 on the inner side in a three-phase parallel connection manner. The number of turns of the coil is 1, and the number of conductor layers in each slot is 4. Among them, a, b, c, and d are the conductors of the first layer, the second layer, the third layer, and the fourth layer respectively. The conductors of the d layer are close to the inner edge of the stator. Insulating paint is applied to the outside of the four conductor layers, and a certain air gap is reserved between them to achieve the isolation purpose. The three phases are phase A, phase B, and phase C. Each phase winding has a first branch, a second branch, a third branch, and a fourth branch. Each phase winding can also have 1 or 2 branches.

[0021] In the winding structure of the 4-layer coil, in the phase A winding, on the first branch, the first-layer conductor in slot 1 spans 1 slot and forms 1 coil with the second-layer conductor, and the first-layer conductor in slot 6 spans 1 slot and forms 1 coil with the second-layer conductor. The two coils are connected together by spanning 4 slots. Specifically, as Figure 2 shown, the first branch: the first-layer conductor in slot 1, then spans 1 slot and forms 1 coil with the second-layer conductor in slot 2, and the first-layer conductor in slot 6 spans 1 slot and forms 1 coil with the second-layer conductor in slot 7. The two coils are connected together by spanning 4 slots (slot 2 / slot 3 / slot 4 / slot 5), that is, the first embedding section slot 1 - slot 2 + the second embedding section slot 6 - slot 7 + the spanning section slot 2 - slot 6, with the starting end A 1 and the ending end X 1 constituting the first branch:

[0022] A 1 1(a)-2(b)-6(a)-7(b)X 1 .

[0023] On the second branch, the third-layer conductor in slot 1 spans 1 slot and forms 1 coil with the fourth-layer conductor, and the third-layer conductor in slot 6 spans 1 slot and forms 1 coil with the fourth-layer conductor. The two coils are connected together by spanning 4 slots. Specifically, as Figure 2 shown, the second branch: the third-layer conductor in slot 1 spans 1 slot and forms 1 coil 1 with the fourth-layer conductor in slot 2, and the third-layer conductor in slot 6 spans 1 slot and forms 1 coil 2 with the fourth-layer conductor in slot 7. The two coils are connected together by spanning 4 slots, with the starting end A 2 and the ending end X 2 constituting the second branch;

[0024] A 2 1(c)-2(d)-6(c)-7(d)X 2 .

[0025] On the third branch, the first-layer conductor in slot 7 spans 1 slot and forms 1 coil with the second-layer conductor, and the first-layer conductor in slot 12 spans 1 slot and forms 1 coil with the second-layer conductor. The two coils are connected together by spanning 4 slots; specifically, as Figure 2As shown, the third branch: The first-layer conductor in slot 7 crosses 1 slot and forms 1 coil 1 with the second-layer conductor, and the first-layer conductor in slot 12 crosses 1 slot and forms 1 coil 2 with the second-layer conductor. The two coils are connected together across 4 slots, with the starting end A 3 and the ending end X 3 forming the third branch:

[0026] X 3 7(a)-8(b)-12(a)-1(b)A 3 .

[0027] On the fourth branch, the third-layer conductor in slot 7 crosses 1 slot and forms 1 coil with the fourth-layer conductor, and the third-layer conductor in slot 12 crosses 1 slot and forms 1 coil with the fourth-layer conductor. The two coils are connected together across 4 slots. Specifically, as Figure 2 shown, the fourth branch: The third-layer conductor in slot 7 crosses 1 slot and forms 1 coil with the fourth-layer conductor, and the third-layer conductor in slot 12 crosses 1 slot and forms 1 coil with the fourth-layer conductor. The two coils are connected together across 4 slots, with the starting end A 4 and the ending end X 4 forming the fourth branch:

[0028] X 4 7(c)-8(d)-12(c)-1(d)A 4 .

[0029] For the case of four branches per phase, there are 8 coils in one phase. Each branch of each phase includes a starting-end hairpin coil such as 1-2, an ending-end hairpin coil such as 6-7, and an intermediate connection section such as 2-6; for the case of one branch or two branches per phase, each branch of each phase includes a starting-end hairpin coil 1-2, an ending-end hairpin coil 12-1, and an intermediate hairpin coil 6-7 / 7-8; and an intermediate connection section 2-6 / 8-12.

[0030] As Figure 3 shown, according to the winding theory of electrical machinery and the principle of vector superposition, it can be known that the induced electromotive force magnitudes and phases generated by the first branch, the second branch, the third branch, and the fourth branch are the same, and each branch can be connected in series or in parallel at the head and tail.

[0031] Figure 3 Combined with Figure 2 , when the ending end X 1 is connected to the starting end A 2 , when the ending end X 2 is connected to the starting end A 3 , when the ending end X 3 is connected to the starting end A 4 , the starting end A 1 and the ending end X 4 form the single-branch structure of the A-phase winding.

[0032] Single branch: A 1 -X 1 -A 2 -X 2 -A 3 -X 3 -A 4 -X 4 , and the four branches are connected in series in sequence at the head and tail.

[0033] When the end X 1 is connected to the start end A 3 When the end X 2 is connected to the start end A 4 When the start end A 1 is connected to the start end A 2 When the end X 3 is connected to the end X 4 a 2-branch structure of the A-phase winding is formed.

[0034] Two branches: A 1 -X 1 -A 3 -X 3 ; A 2 -X 2 -A 4 -X 4 ; Then connect A 1 A 2 Connect X 3 and X 4 Connect the first branch and the third branch in series, the second branch and the fourth branch in series, A 1 / A 2 as the common input terminal, X 3 / X 4 as the common output terminal, forming two parallel branches.

[0035] When the start end A 1 、the start end A 2 、the start end A 3 and the start end A 4 are connected together, when the end X 1 、the end X 2 、the end X 3 and the end X 4 are connected together, a 4-branch structure of the A-phase winding is formed.

[0036] Four branches: A 1 -X 1 、A 2 -X 2 、A 3 -X 3 、A 4 -X 4The A terminals are connected together, the X terminals are connected together, and the first, second, third, and fourth branches are in parallel.

[0037] As Figure 2 and Figure 4 shown, the B-phase winding is obtained by rotating the A-phase winding 4 slot numbers in the direction of increasing slot numbers; the C-phase winding is obtained by rotating the A-phase winding 8 slot numbers in the direction of increasing slot numbers.

[0038] The B-phase winding is obtained by rotating the A-phase winding 4 slot numbers in the direction of increasing slot numbers;

[0039] B 1 5(a)-6(b)-10(a)-11(b)Y 1 ;

[0040] B 2 5(c)-6(d)-10(c)-11(d)Y 2 ;

[0041] Y 3 11(a)-12(b)-4(a)-5(b)B 3 ;

[0042] Y 4 11(c)-12(d)-4(c)-5(d)B 4 ;

[0043] The C-phase winding is obtained by rotating the A-phase winding 8 slot numbers in the direction of increasing slot numbers;

[0044] C 1 9(a)-10(b)-2(a)-3(b)Z 1 ;

[0045] C 2 9(c)-10(d)-2(c)-3(d)Z 2 ;

[0046] Z 3 3(a)-4(b)-8(a)-9(b)C 3 ;

[0047] Z 4 3(c)-4(d)-8(c)-9(d)C 4 ;

[0048] It can be seen that all 48 conductors in the 12 stator slots are used once, and each branch of each phase winding contains conductors in four different slots.

[0049] Similarly, the B-phase winding and the C-phase winding can also form one or two branches or four branches, but it is necessary to ensure that the winding structure is symmetrical and the number of branches of each phase winding is the same. A single-branch structure of the three-phase winding of a 12-slot 10-pole 4-layer stator flat wire wave winding is as Figure 4 shown.

[0050] In summary, although the present utility model has been disclosed above with the preferred embodiments, the above preferred embodiments are not intended to limit the present utility model. Those of ordinary skill in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A 12-slot, 10-pole, 4-layer stator flat-line wave winding structure used in a UAV drive motor, characterized in that: Including slots 1 to 12, 24 coils; 24 coils are wound in three-phase parallel on a circular stator core punching sheet with slots 1 to 12 on the inner side, the number of turns of the coil is 1, the number of conductor layers in each slot is 4, the three phases are phase A, phase B and phase C, and each phase winding has a first branch, a second branch, a third branch and a fourth branch; Among them, in the winding structure of 4-layer coils, in the A-phase winding, the first-layer conductor in slot No. 1 on the first branch spans 1 slot and forms a coil with the second-layer conductor, and the first-layer conductor in slot No. 6 spans 1 slot and forms a coil with the second-layer conductor, and the two coils are connected together across 4 slots; the third-layer conductor in slot No. 1 on the second branch spans 1 slot and forms a coil with the fourth-layer conductor, and the third-layer conductor in slot No. 6 spans 1 slot and forms a coil with the fourth-layer conductor, and the two coils are connected together across 4 slots; the first-layer conductor in slot No. 7 on the third branch spans 1 slot and forms a coil with the second-layer conductor, and the first-layer conductor in slot No. 12 spans 1 slot and forms a coil with the second-layer conductor, and the two coils are connected together across 4 slots; the third-layer conductor in slot No. 7 on the fourth branch spans 1 slot and forms a coil with the fourth-layer conductor, and the third-layer conductor in slot No. 12 spans 1 slot and forms a coil with the fourth-layer conductor, and the two coils are connected together across 4 slots, and there are 8 coils in one phase.

2. According to claim 1, a 12-slot, 10-pole, 4-layer stator flat-line wave winding structure applied to a UAV drive motor is characterized in that: The induced electromotive force generated by the first branch, the second branch, the third branch and the fourth branch is the same in magnitude and phase, and each branch is connected together in series or in parallel.

3. The 12-slot, 10-pole, 4-layer stator flat-line wave winding structure used in the driving motor of a drone according to claim 2 is characterized in that: The B-phase winding is obtained by rotating 4 slot numbers relative to the A-phase winding in the direction of increasing slot numbers; the C-phase winding is obtained by rotating 8 slot numbers relative to the A-phase winding in the direction of increasing slot numbers.

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