A high power density permanent magnet motor for drones

Abstract

This invention relates to the field of motor technology and discloses a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs). The motor includes a stator with a winding section and a frequency conversion section. The winding section is arranged in a ring array around the center of the stator, allowing for different coil combinations on a single winding. The winding section includes slots A, B, and C. Slot A is located on the inner wall of the stator, while slots B and C are located on the stator itself. The inner wall of the stator also has inlet holes A, B, and C. Inlet holes A and B communicate with slot A, and inlet holes B and B communicate with slot B. The motor employs a wide-range speed control to adapt to UAV operating conditions, featuring a six-speed adjustment function. The rated speed ranges from 8 r / min (8 Hz) to 48 r / min (48 Hz), and the speed ratio can reach 1:8 during weak field operation. This allows for precise matching of the power requirements of different stages of UAV operation, such as takeoff, cruise, and high-speed flight, achieving full operating condition coverage without motor replacement.

Description

Technical Field

[0001] This invention relates to the field of motor technology, specifically to a high-power-density permanent magnet motor for use in unmanned aerial vehicles (UAVs). Background Technology

[0002] In the field of drones, high-power-density permanent magnet motors are one of the core power components, and their performance directly affects the drone's endurance, payload capacity, and flight stability. Traditional permanent magnet motors used in drones have significant limitations in terms of power density and speed adaptability.

[0003] From a power output perspective, the power and speed requirements of drones vary greatly depending on the operating conditions, such as takeoff, cruise, hovering, and high-speed flight. For example, high torque and low speed are needed to overcome gravity during takeoff, while medium-speed stable output is required during cruise to save energy. High-speed flight, on the other hand, requires high speed to improve propeller efficiency. Traditional single-speed or dual-speed permanent magnet motors are difficult to adjust with a wide range and precision on the same device, often requiring a sacrifice of some power density to meet basic speed requirements, resulting in a prominent contradiction between power performance and energy efficiency.

[0004] From a structural design perspective, to accommodate limited speed variations, traditional multi-speed drone motors often employ a multi-winding design. This results in a complex internal structure, cumbersome winding processes, and stringent insulation requirements. Furthermore, the multi-winding layout increases the motor's size and weight, contradicting the core requirement of "lightweight" drones. The added weight directly shortens flight time and reduces the maximum load capacity.

[0005] In terms of manufacturing costs and maintenance, the multi-winding design not only increases raw material consumption and labor assembly costs, but also increases the difficulty of troubleshooting. As high-altitude work equipment, the time and economic costs of repairing UAV motors are far higher than those of ground equipment. The increased number of failure points due to the complex structure further reduces the reliability and ease of use of the equipment. Therefore, a high-power-density permanent magnet motor for UAVs is proposed to solve the above-mentioned problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a high-power-density permanent magnet motor for drones, which solves the problems of insufficient power density, increased weight, and high maintenance costs caused by the limited speed range and complex structure of traditional permanent magnet motors used in drones, thus meeting the diverse power output needs of drones under different operating conditions.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution: a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs), comprising a stator, wherein a winding section and a frequency conversion section are provided on the stator, the winding section is arranged in a ring array with the center of the stator as the axis, for realizing different coil combinations on a single winding, the winding section includes an A-slot, a B-slot and a C-slot, the A-slot is formed in the inner wall of the stator, the B-slot and the C-slot are formed in the stator, the inner wall of the stator is also provided with an A-inlet hole, a B-inlet hole and a C-inlet hole, the A-inlet hole is connected to the A-slot, the B-inlet hole is connected to the B-slot, the C-inlet hole is connected to the C-slot, and the A-inlet hole, the B-inlet hole and the C-inlet hole are arranged alternately.

[0010] Preferably, the frequency converter includes a turntable disposed on the back of the stator. An insulating column is fixedly connected to the back of the turntable, and a worm gear is fixedly sleeved on the insulating column. The front of the turntable is provided with a U-phase positioning line, a V-phase positioning line, and a W-phase positioning line. A U-phase electrode is installed on the U-phase positioning line, a V-phase electrode is installed on the V-phase positioning line, and a W-phase electrode is installed on the W-phase positioning line. The U-phase electrode, V-phase electrode, and W-phase electrode are fixedly extended to the end of the insulating column. The U-phase positioning line, V-phase positioning line, and W-phase positioning line are all circumferentially distributed. The diameter of the circle containing the U-phase positioning line is smaller than the diameter of the circle containing the V-phase positioning line, and the diameter of the circle containing the V-phase positioning line is smaller than the diameter of the circle containing the W-phase positioning line. The A-slot is correspondingly arranged along the circumferential direction of the U-phase positioning line, the B-slot is correspondingly arranged along the circumferential direction of the V-phase positioning line, and the C-slot is correspondingly arranged along the circumferential direction of the W-phase positioning line.

[0011] Preferably, the B-slot is located between the A-slot and the C-slot, the A-slot, the B-slot, and the C-slot are on the same axis, the centers of the U-phase positioning line, the V-phase positioning line, and the W-phase positioning line are all aligned with the center of the stator, and the lines of the U-phase positioning line, the V-phase positioning line, and the W-phase positioning line are respectively aligned with the center of the A-slot, the center of the B-slot, and the center of the C-slot.

[0012] Preferably, there are six winding sections, and the distance between every two winding sections is sixty degrees. The center of the U-phase electrode, the center of the V-phase electrode, and the center of the W-phase electrode are respectively aligned with the center of the A-slot, the center of the B-slot, and the center of the C-slot in the same circumferential direction.

[0013] Preferably, a control unit is provided on the back of the stator. The control unit includes a chassis. An electrode connection port corresponding to an insulating post is opened on the front of the chassis. The insulating post is inserted into the electrode connection port. The U-phase electrode, V-phase electrode and W-phase electrode are all electrically connected to the electrode connection port. A power socket is provided on the side wall of the chassis. The power socket is electrically connected to the electrode connection port.

[0014] Preferably, the chassis is provided with a drive unit, the drive unit includes a frame, the frame is installed on the top of the outer wall of the chassis, a rotary motor is installed on the frame, the output shaft of the rotary motor is connected to a rotating shaft, two rods are symmetrically installed on the front of the chassis, a worm gear is rotatably connected between the two rods, and pulleys are fixedly sleeved on the ends of the worm gear and the rotating shaft, and a transmission belt is drivingly connected between the two pulleys.

[0015] Preferably, the insulating column is provided with a mounting part, the mounting part including a tail shell, the inner wall of the tail shell having a rotating groove, and the inner wall of the rotating groove having a rotating hole.

[0016] Preferably, the worm and the worm wheel mesh, the insulating column movably passes through the rotating hole and is rotatably connected to the inner wall of the rotating hole, the turntable is disposed in the tail housing and fits against the inner wall of the rotating groove, and a plug ring is fixedly connected to the back of the stator and the plug ring is inserted into the inner wall of the tail housing.

[0017] Preferably, the back of the stator is provided with an anti-interference part, which includes a C insulating cover, a B insulating cover, and an A insulating cover. The C insulating cover is fixedly connected to the outer wall of the C wire groove and has a notch corresponding to the C wire inlet hole. The B insulating cover is fixedly connected to the outer wall of the B wire groove and has a notch corresponding to the B wire inlet hole. The A insulating cover is fixedly connected to the outer wall of the A wire groove and has a notch corresponding to the A wire inlet hole. The inner walls of the C insulating cover, the B insulating cover, and the A insulating cover are all fixedly connected with positioning frames, and each positioning frame is fixedly connected with a winding post.

[0018] Preferably, there are six anti-interference parts, which are arranged in a ring array with the center of the stator as the axis. The distance between each pair of anti-interference parts is 60 degrees. The six anti-interference parts are aligned with the six winding parts. The turntable is attached to each C insulating cover, B insulating cover, and A insulating cover. The U-phase electrode, V-phase electrode, and W-phase electrode are in contact with the ends of the corresponding winding posts.

[0019] Preferably, the outer wall of the stator is fitted with a housing, the tail shell is fixedly connected to the back of the housing, the outer wall of the housing is integrally connected with a support leg, a base is fixedly connected to the support leg, and the chassis is mounted on the base.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides a high power density permanent magnet motor for drones, which has the following beneficial effects:

[0022] 1. This high-power-density permanent magnet motor for drones adopts a wide-range variable speed to adapt to the operating conditions of drones. It has a six-speed adjustment function, with a rated speed from 8r / min (8Hz) to 48r / min (48Hz). When the field is weakened, the speed ratio can reach 1:8. It can accurately match the power requirements of drones in different stages such as take-off, cruise, and high-speed flight, and can achieve full operating condition coverage without replacing the motor.

[0023] 2. This high-power-density permanent magnet motor for drones balances high power density with lightweight design. The single-winding design simplifies the internal structure, reduces the amount of winding material, and lowers the overall weight of the motor. At the same time, by optimizing the slot layout and coil combination, the power output is increased within the same volume, meeting the core requirements of "lightweight and high power" for drones.

[0024] 3. This high-power-density permanent magnet motor for drones adopts constant power and energy efficiency optimization, maintaining constant power at different speeds, avoiding the power loss of traditional motors when changing speeds. It can efficiently drive takeoff in the low-speed, high-torque stage, and reduce energy consumption by weakening the magnetic field to extend the drone's flight time in the high-speed stage.

[0025] 4. The high-power-density permanent magnet motor used in UAVs adopts an anti-interference design to ensure flight stability. The C-insulation cover, B-insulation cover and A-insulation cover of the anti-interference part can effectively suppress current interference between coils, ensuring stable operation of the motor in the complex electromagnetic environment at high altitudes and reducing the risk of flight failure caused by electromagnetic interference.

[0026] 5. The high-power-density permanent magnet motor used in UAVs adopts automated speed change to improve maneuverability. Through the coordination of the control unit, drive unit and frequency converter, automated speed switching is achieved. The UAV flight control system can automatically adjust the motor output according to real-time operating conditions, reducing the burden of manual operation and improving flight safety.

[0027] 6. This high-power-density permanent magnet motor for drones adopts low cost and high reliability. The single-winding design reduces manufacturing and maintenance costs and reduces failure points. Combined with the modular mounting structure, it facilitates quick inspection and replacement of drone motors, making it suitable for mass production and practical applications. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs) proposed in this invention.

[0029] Figure 2 This is a structural diagram of the winding section of a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs) proposed in this invention.

[0030] Figure 3This is a back structure diagram of a high power density permanent magnet motor stator for unmanned aerial vehicles proposed in this invention;

[0031] Figure 4 This invention proposes a high power density permanent magnet motor for unmanned aerial vehicles (UAVs). Figure 3 Enlarged view of A in the middle;

[0032] Figure 5 This is a connection diagram of a high-power-density permanent magnet motor chassis and mounting part for a drone proposed in this invention;

[0033] Figure 6 This is a connection diagram of the tail shell and frequency converter of a high power density permanent magnet motor for a drone proposed in this invention;

[0034] Figure 7 This is a rear view of a high-power-density permanent magnet motor frequency converter for an unmanned aerial vehicle (UAV) proposed in this invention.

[0035] Figure 8 This is an exploded view of the tail shell and frequency converter of a high-power-density permanent magnet motor for unmanned aerial vehicles proposed in this invention.

[0036] In the diagram: 1. Stator; 2. Control unit; 21. Chassis; 22. Power socket; 3. Drive unit; 31. Frame; 32. Rotary motor; 33. Shaft; 34. Worm gear; 35. Drive belt; 4. Mounting unit; 41. Tail housing; 42. Rotary groove; 43. Rotary hole; 5. Frequency converter; 51. Turntable; 52. Insulating column; 53. Worm gear; 54. U-phase positioning line; 55. V-phase positioning line; 56. W-phase Positioning line; 57. U-phase electrode; 58. V-phase electrode; 59. W-phase electrode; 6. Winding section; 61. A-slot; 62. B-slot; 63. C-slot; 64. A-inlet hole; 65. B-inlet hole; 66. C-inlet hole; 7. Insert ring; 8. Anti-interference section; 81. C-insulating cover; 82. B-insulating cover; 83. A-insulating cover; 84. Positioning frame; 85. Winding post; 9. Housing; 10. Base. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] Please see Figure 1-8This invention provides a technical solution: a high-power-density permanent magnet motor for unmanned aerial vehicles (UAVs), comprising a stator 1, a winding section 6 and a frequency conversion section 5. The winding section 6 is arranged in a ring array with the center of the stator 1 as the axis. In order to realize different coil combinations on a single winding, the winding section 6 includes an A-slot 61, a B-slot 62 and a C-slot 63. The A-slot 61 is formed on the inner wall of the stator 1, and the B-slot 62 and C-slot 63 are formed on the stator 1. The inner wall of the stator 1 is also provided with an A-inlet hole 64, a B-inlet hole 65 and a C-inlet hole 66. The A-inlet hole 64 is connected to the A-slot 61, the B-inlet hole 65 is connected to the B-slot 62, and the C-inlet hole 66 is connected to the C-slot 63. The A-inlet hole 64, the B-inlet hole 65 and the C-inlet hole 66 are arranged alternately.

[0039] In this invention, to provide two or more speeds while maintaining constant power, the frequency converter 5 includes a turntable 51. The turntable 51 is disposed on the back of the stator 1, and an insulating post 52 is fixedly connected to the back of the turntable 51. A worm gear 53 is fixedly sleeved on the insulating post 52. The front of the turntable 51 is provided with a U-phase positioning line 54, a V-phase positioning line 55, and a W-phase positioning line 56. A U-phase electrode 57 is installed on the U-phase positioning line 54, a V-phase electrode 58 is installed on the V-phase positioning line 55, and a W-phase electrode 59 is installed on the W-phase positioning line 56. The U-phase electrode 57, V-phase electrode 58, and W-phase electrode 59 are respectively installed on the W-phase positioning line 56. Electrode 58 and W-phase electrode 59 are fixedly inserted to the end of insulating post 52. U-phase positioning line 54, V-phase positioning line 55 and W-phase positioning line 56 are all circumferentially distributed. The diameter of the circle containing U-phase positioning line 54 is smaller than the diameter of the circle containing V-phase positioning line 55, and the diameter of the circle containing V-phase positioning line 55 is smaller than the diameter of the circle containing W-phase positioning line 56. A-line groove 61 is set along the circumferential direction of U-phase positioning line 54, B-line groove 62 is set along the circumferential direction of V-phase positioning line 55, and C-line groove 63 is set along the circumferential direction of W-phase positioning line 56.

[0040] In this embodiment, B groove 62 is located between A groove 61 and C groove 63. A groove 61, B groove 62 and C groove 63 are on the same axis. The centers of U-phase positioning line 54, V-phase positioning line 55 and W-phase positioning line 56 are all aligned with the center of stator 1. The lines of U-phase positioning line 54, V-phase positioning line 55 and W-phase positioning line 56 are respectively aligned with the centers of A groove 61, B groove 62 and C groove 63. There are six winding parts 6. The distance between every two winding parts 6 is 60 degrees. The centers of U-phase electrode 57, V-phase electrode 58 and W-phase electrode 59 are respectively aligned with the centers of A groove 61, B groove 62 and C groove 63 in the same circumferential direction.

[0041] It is worth noting that, in order to further automate the control of the output frequency, a control unit 2 is provided on the back of the stator 1. The control unit 2 includes a chassis 21. The front of the chassis 21 has an electrode connection port corresponding to the insulating post 52. The insulating post 52 is inserted into the electrode connection port. The U-phase electrode 57, V-phase electrode 58, and W-phase electrode 59 are all electrically connected to the electrode connection port. A power socket 22 is provided on the side wall of the chassis 21. The power socket 22 is electrically connected to the electrode connection port. A drive unit 3 is provided on the chassis 21. The drive unit 3 includes a frame 31. The frame 31 is installed on the top of the outer wall of the chassis 21. A rotary motor 32 is installed on the frame 31. The output shaft of the rotary motor 32 is connected to a rotating shaft 33. Two rods are symmetrically mounted on the front of the chassis 21. A worm gear 34 is rotatably connected between the two rods. Pulleys are fixedly fitted at the ends of the worm gear 34 and the shaft 33. A transmission belt 35 is connected between the two pulleys. An installation part 4 is provided on the insulating column 52. The installation part 4 includes a tail shell 41. A rotating groove 42 is opened on the inner wall of the tail shell 41. A rotating hole 43 is opened on the inner wall of the rotating groove 42. The worm gear 34 meshes with the worm wheel 53. The insulating column 52 movably passes through the rotating hole 43 and is rotatably connected to the inner wall of the rotating hole 43. The turntable 51 is set in the tail shell 41 and fits against the inner wall of the rotating groove 42. A plug ring 7 is fixedly connected to the back of the stator 1. The plug ring 7 is inserted into the inner wall of the tail shell 41.

[0042] It is worth noting that, in order to avoid electrical interference between different combinations of coils, an anti-interference part 8 is provided on the back of the stator 1. The anti-interference part 8 includes a C insulating cover 81, a B insulating cover 82, and an A insulating cover 83. The C insulating cover 81 is fixedly connected to the outer wall of the C wire groove 63 and has a notch corresponding to the C wire inlet hole 66. The B insulating cover 82 is fixedly connected to the outer wall of the B wire groove 62 and has a notch corresponding to the B wire inlet hole 65. The A insulating cover 83 is fixedly connected to the outer wall of the A wire groove 61 and has a notch corresponding to the A wire inlet hole 64. The inner walls of the C insulating cover 81, the B insulating cover 82, and the A insulating cover 83 are all fixedly connected to a positioning frame 84, and a winding post 85 is fixedly connected to each positioning frame 84.

[0043] There are six anti-interference units 8, which are arranged in a ring array with the center of the stator 1 as the axis. The distance between each pair of anti-interference units 8 is 60 degrees. The six anti-interference units 8 are aligned with the six winding units 6 one by one. The turntable 51 is attached to each of the C insulating cover 81, B insulating cover 82, and A insulating cover 83. The U-phase electrode 57, V-phase electrode 58, and W-phase electrode 59 are in contact with the ends of the corresponding winding posts 85. When each electrode contacts the corresponding winding post 85, the corresponding insulating cover will surround it, effectively suppressing the interference between currents and ensuring the stable operation of the motor. The outer wall of the stator 1 is equipped with a housing 9. The tail cover 41 is fixedly connected to the back of the housing 9. The outer wall of the housing 9 is integrally connected with a support foot, and a base 10 is fixedly connected to the support foot. The chassis 21 is mounted on the base 10.

[0044] Working principle: A coil A, coil B, and coil C are wound in each of the A-slot 61, B-slot 62, and C-slot 63 respectively. The end of each coil extends to the back of the stator 1 and is wound on the corresponding winding post 85. Taking the A-slot 61 at 12 o'clock on the stator 1 as A1, the remaining A-slots 61 arranged clockwise are A2, A3, A4, A5, and A6. Taking the B-slot 62 120 degrees clockwise from A1 as B1, the other B-slots 62 arranged clockwise from B1 are B2, B3, B4, B5, and B6. Taking the C-slot 63 120 degrees clockwise from B1 as C1, the remaining C-slots 62 arranged clockwise from C1 are... The other C-grooves 63 arranged in the needle arrangement are C2, C3, C4, C5, and C6 in sequence. At this time, when the U-phase electrode 57 is in contact with the winding post 85 at A1, the V-phase electrode 58 and W-phase electrode 59 at the corresponding positions must be in contact with the winding posts 85 of B1 and C1, respectively. At this time, A2-A6, B2-B6, and C2-C6 are not connected to the electrodes. The electrode connection port of the chassis 21 is connected through the three electrodes to form a circuit, thereby forming a speed regulation. At this time, the rated speed of the motor is 8 r / min (8 Hz), the rated torque is 65656 Nm, and it can be operated with weak field to 12 r / min (12 Hz, 43771 Nm).

[0045] The rotating motor 32 drives the rotating shaft 33 to rotate, and the transmission belt 35 drives the worm gear 34, causing the meshing worm wheel 53 to rotate for adjustment, causing the turntable 51 to rotate 60 degrees clockwise. At this time, the U-phase electrode 57, V-phase electrode 58, and W-phase electrode 59 contact the winding post 85 at A2, B2, and C2 respectively, thereby switching to two-speed adjustment. At this time, the rated speed is 12 r / min (12 Hz), the rated torque is 43771 Nm, and the field weakening operation is 16 r / min (16 Hz, 32828 Nm).

[0046] The drive unit 3 drives the frequency converter 5 to rotate by the aforementioned angle, and so on, thereby realizing multi-speed adjustment. The rated speed is 16 r / min (16 Hz), the rated torque is 32828 Nm, and the field weakening operation is 24 r / min (24 Hz, 21885 Nm).

[0047] The four-speed adjustable rated speed is 24 r / min (24 Hz) and the rated torque is 21885 Nm. The field weakening operation is up to 32 r / min (32 Hz, 16414 Nm).

[0048] The five-speed adjustable rated speed is 32r / min (32Hz) and the rated torque is 16414Nm. The field weakening operation is up to 48r / min (48Hz, 10943Nm).

[0049] The six-speed adjustable rated speed is 48 r / min (48 Hz) and the rated torque is 10943 Nm. The field weakening operation is 64 r / min (64 Hz, 8207 Nm).

[0050] By utilizing different coil combinations on the single winding of stator 1, different output speeds can be formed to meet the equipment operation requirements. At different speeds, the same power can still be maintained. Each speed forms a fixed frequency, and the frequency can be switched by rotating the turntable 51 to obtain different output speeds, thus meeting the different speed requirements of the equipment.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A high power density permanent magnet electric machine for drones comprising a stator (1) characterized by: The stator (1) is provided with a winding section (6) and a frequency conversion section (5). The winding section (6) is arranged in a ring array with the center of the stator (1) as the axis, and is used to realize different coil combinations on a single winding. The winding section (6) includes an A-slot (61), a B-slot (62) and a C-slot (63). The A-slot (61) is opened on the inner wall of the stator (1). The B-slot (62) and the C-slot (63) are opened on the stator (1). The inner wall of the stator (1) is also provided with an A-inlet hole (64), a B-inlet hole (65) and a C-inlet hole (66). The A-inlet hole (64) is connected to the A-slot (61). The B-inlet hole (65) is connected to the B-slot (62). The C-inlet hole (66) is connected to the C-slot (63). The A inlet hole (64), B inlet hole (65) and C inlet hole (66) are arranged alternately; The frequency converter (5) includes a turntable (51), which is located on the back of the stator (1). An insulating column (52) is fixedly connected to the back of the turntable (51). A worm gear (53) is fixedly sleeved on the insulating column (52). A U-phase positioning line (54), a V-phase positioning line (55), and a W-phase positioning line (56) are provided on the front of the turntable (51). A U-phase electrode (57) is installed on the U-phase positioning line (54), a V-phase electrode (58) is installed on the V-phase positioning line (55), and a W-phase electrode (59) is installed on the W-phase positioning line (56). The U-phase electrode (57), V-phase electrode (58), and W-phase electrode (59) are fixedly inserted through the end of the insulating column (52). The U-phase positioning line (54), V-phase positioning line (55), and W-phase positioning line (56) are all circumferentially distributed. The diameter of the circle containing the U-phase positioning line (54) is smaller than the diameter of the circle containing the V-phase positioning line (55), and the diameter of the circle containing the V-phase positioning line (55) is smaller than the diameter of the circle containing the W-phase positioning line (56). The A-line groove (61) is set in accordance with the circumferential direction of the U-phase positioning line (54), the B-line groove (62) is set in accordance with the circumferential direction of the V-phase positioning line (55), and the C-line groove (63) is set in accordance with the circumferential direction of the W-phase positioning line (56). The center of the U-phase electrode (57), the center of the V-phase electrode (58), and the center of the W-phase electrode (59) are respectively aligned with the center of the A-line groove (61), the center of the B-line groove (62), and the center of the C-line groove (63) in the same circumferential direction.

2. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 1, characterized in that: The B-slot (62) is located between the A-slot (61) and the C-slot (63). The A-slot (61), B-slot (62), and C-slot (63) are on the same axis. The centers of the U-phase positioning line (54), V-phase positioning line (55), and W-phase positioning line (56) are all aligned with the center of the stator (1). The lines of the U-phase positioning line (54), V-phase positioning line (55), and W-phase positioning line (56) are respectively aligned with the centers of the A-slot (61), B-slot (62), and C-slot (63).

3. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 2, characterized in that: There are six winding portions (6), and the distance between any two winding portions (6) is sixty degrees.

4. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 3, characterized in that: The back of the stator (1) is provided with a control unit (2), which includes a chassis (21). The front of the chassis (21) is provided with an electrode connection port corresponding to the insulating post (52). The insulating post (52) is inserted into the electrode connection port. The U-phase electrode (57), V-phase electrode (58) and W-phase electrode (59) are all electrically connected to the electrode connection port. The side wall of the chassis (21) is provided with a power socket (22), which is electrically connected to the electrode connection port.

5. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 4, characterized in that: The chassis (21) is provided with a drive unit (3), which includes a frame (31). The frame (31) is installed on the top of the outer wall of the chassis (21). A rotary motor (32) is installed on the frame (31). The output shaft of the rotary motor (32) is connected to a rotating shaft (33). Two rods are symmetrically installed on the front of the chassis (21). A worm gear (34) is rotatably connected between the two rods. Pulleys are fixedly sleeved on the ends of the worm gear (34) and the ends of the rotating shaft (33). A transmission belt (35) is connected between the two pulleys.

6. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 5, characterized in that: The insulating column (52) is provided with an installation part (4), the installation part (4) includes a tail shell (41), the inner wall of the tail shell (41) is provided with a rotating groove (42), and the inner wall of the rotating groove (42) is provided with a rotating hole (43).

7. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 6, characterized in that: The worm (34) meshes with the worm wheel (53), the insulating column (52) moves through the rotating hole (43) and is rotatably connected to the inner wall of the rotating hole (43), the turntable (51) is set in the tail shell (41) and fits against the inner wall of the rotating groove (42), and the back of the stator (1) is fixedly connected with a plug ring (7), which is inserted into the inner wall of the tail shell (41).

8. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 7, characterized in that: The back of the stator (1) is provided with an anti-interference part (8). The anti-interference part (8) includes a C insulating cover (81), a B insulating cover (82) and an A insulating cover (83). The C insulating cover (81) is fixedly connected to the outer wall of the C wire groove (63) and has a notch corresponding to the C inlet hole (66). The B insulating cover (82) is fixedly connected to the outer wall of the B wire groove (62) and has a notch corresponding to the B inlet hole (65). The A insulating cover (83) is fixedly connected to the outer wall of the A wire groove (61) and has a notch corresponding to the A inlet hole (64). The inner walls of the C insulating cover (81), the B insulating cover (82) and the A insulating cover (83) are all fixedly connected with positioning frames (84). Each positioning frame (84) is fixedly connected with a winding post (85).

9. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 8, characterized in that: There are six anti-interference parts (8). The six anti-interference parts (8) are arranged in a ring array with the center of the stator (1) as the axis. The distance between each pair of anti-interference parts (8) is sixty degrees. The six anti-interference parts (8) are aligned with the six winding parts (6). The turntable (51) is attached to each C insulating cover (81), B insulating cover (82), and A insulating cover (83). The U-phase electrode (57), V-phase electrode (58), and W-phase electrode (59) are in contact with the ends of the corresponding winding posts (85).

10. A high-power-density permanent magnet motor for unmanned aerial vehicles according to claim 9, characterized in that: The outer wall of the stator (1) is fitted with a housing (9), the tail shell (41) is fixedly connected to the back of the housing (9), the outer wall of the housing (9) is integrally connected with a support foot, the support foot is fixedly connected with a base (10), and the chassis (21) is mounted on the base (10).

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