Magnetic gear composite motor

Abstract

The application provides a magnetic gear composite motor, which comprises a magnet adjusting assembly sleeved on the outside of a rotor assembly, and a stator assembly sleeved on the outside of the magnet adjusting assembly; the rotor assembly comprises a rotor core and a rotor permanent magnet, the rotor permanent magnet is arranged on the rotor core, and a plurality of groove groups extending along the axial direction of the rotor core are formed on the rotor core; each groove group is arranged at intervals along the circumferential direction of the rotor core; at least part of the groove groups are filled with a first filler; and the first filler is made of an electrically-conductive and magnetically-non-conductive material. According to the application, the groove groups are formed along the axial direction of the rotor core, and the first filler is filled in at least part of the groove groups; the first filler is made of an electrically-conductive and magnetically-non-conductive material; when the winding of the stator assembly is electrified, the first filler in the rotor core generates an induced current loop, so that the rotor assembly rotates under electromagnetic induction, the self-starting of the magnetic gear composite motor is realized, and the stable rotating speed is quickly reached without a complicated controller.

Description

Magnetic gear composite motor Technical Field

[0001] This invention belongs to the field of motor technology, specifically relating to a magnetic gear composite motor. Background Technology

[0002] Magnetic gears, as a novel non-contact gear structure that transmits torque via magnetic field coupling, offer advantages such as low noise, high efficiency, ease of maintenance, and high reliability. Combining coaxial magnetic gears with a permanent magnet synchronous motor and reusing the internal rotor results in a low-speed, high-torque motor. This motor enables dual-rotor rotation, has a specific speed ratio, and completes torque transmission, making it a suitable new type of motor for low-speed, high-torque direct-drive applications. However, existing low-speed, high-torque motors generally require complex controllers for starting and speed regulation, resulting in significant torque fluctuations and low torque density and efficiency. Summary of the Invention

[0003] Therefore, the present invention provides a magnetic gear composite motor that can solve the problem that existing low-speed, high-torque motors require complex controllers for starting and speed regulation.

[0004] To address the aforementioned problems, this invention provides a magnetic gear composite motor, comprising: a rotor assembly, a magnetic adjustment assembly, and a stator assembly. The magnetic adjustment assembly is mounted on the outside of the rotor assembly, and the stator assembly is mounted on the outside of the magnetic adjustment assembly. The rotor assembly includes a rotor core and a rotor permanent magnet. The rotor permanent magnet is disposed on the rotor core. The rotor core has a plurality of groove groups extending along its axial direction. Each groove group is spaced apart along the circumference of the rotor core. At least a portion of the groove groups is filled with a first filler material, the first filler material being a conductive but non-magnetic material.

[0005] In some embodiments, the portion of the first filler outside the rotor core is short-circuited.

[0006] In some embodiments, the groove group includes a first filling groove, which is close to the outer circumferential surface of the rotor core. At least one magnetic bridge is provided in the first filling groove, and each magnetic bridge divides the first filling groove into several independent spaces, each of which is filled with the first filler.

[0007] In some embodiments, the groove group further includes a second filling groove, and the second filling grooves are distributed on both sides of the first filling groove along the circumferential direction of the rotor core, and both second filling grooves are filled with the first filler.

[0008] In some embodiments, the groove group further includes a magnetic barrier groove along the radial direction of the rotor core, the magnetic barrier groove being located inside the first filling groove, and along the circumferential direction of the rotor core, two second filling grooves being located on both sides of the magnetic barrier groove, the magnetic barrier groove being filled with the first filler.

[0009] In some embodiments, the rotor permanent magnet is disposed on the outer circumferential surface of the rotor core, and the magnetic barrier groove is connected to the second filling groove.

[0010] In some embodiments, the groove group further includes a magnetic barrier groove along the radial direction of the rotor core, the magnetic barrier groove being located inside the first filling groove, and along the circumferential direction of the rotor core, two second filling grooves being located on both sides of the magnetic barrier groove, the rotor permanent magnet being assembled in the magnetic barrier groove, and the magnetic barrier groove being not connected to the second filling groove.

[0011] In some embodiments, the magnetizing assembly includes a magnetizing element that is fitted onto the outside of the rotor assembly.

[0012] In some embodiments, the magnetizer has a plurality of receiving slots arranged at intervals along the circumference of the magnetizer, and the receiving slots are filled with a second filler for enhancing the strength of the magnetizer.

[0013] In some embodiments, adjusting teeth are formed between two adjacent receiving slots, and the number of adjusting teeth is N; the stator assembly includes a stator core and stator permanent magnets, the stator core is fitted on the outside of the adjusting assembly, the number of stator permanent magnets is even, each stator permanent magnet is distributed at intervals along the inner peripheral wall of the stator core, and stator permanent magnets with different magnetic poles are arranged alternately, the number of pole pairs of the stator permanent magnets is N1; the rotor permanent magnets are even, each rotor permanent magnet is distributed at intervals along the circumference of the rotor core, the number of pole pairs of the rotor permanent magnets is N2, N = N1 + N2.

[0014] In some embodiments, the rotor assembly and the magnetizing assembly rotate in the same direction, the rotor assembly rotates at a speed of S1, the magnetizing assembly rotates at a speed of S2, and S1 / S2 = N / N2.

[0015] In some embodiments, when the rotor permanent magnet is disposed on the outer circumferential surface of the rotor core, the plane containing any cross-section of the rotor core is a reference plane, the vertical projection of the rotor core in the reference plane is a first projection plane, the first projection plane has a center point O, the vertical projection of the rotor permanent magnet in the reference plane is a second projection plane, the second projection plane and the first projection plane have a curve segment that coincides, the curve segment has an endpoint A and an endpoint B, the line connecting the endpoint A and the center point O is a first line segment, the line connecting the endpoint B and the center point O is a second line segment, the included angle formed between the first line segment and the second line segment is β, the vertical projection of each of the adjusting teeth in the reference plane is a third projection plane, each of the third projection planes has a line of symmetry, the center point O is located on the line of symmetry, the included angle formed between two adjacent lines of symmetry is α1, 0.7(N / 2N2)<β / α1<N / 2N2.

[0016] In some embodiments, the plane containing any cross-section of the rotor core is a reference plane, and the projections of the two second filling slots in the reference plane are both fourth projection planes. Each of the two fourth projection planes has a first side, which extends radially along the rotor core. The extensions of the two first sides intersect, and the included angle formed between the two first sides is α2, where 360° / 2N2≤α2≤180°.

[0017] In some embodiments, the vertical projection of the rotor core in the reference plane is a first projection plane, the first projection plane having a center point O and an outer contour line, the first side being the side of the fourth projection plane away from the magnetic barrier groove, the two first sides having endpoints C and D close to the outer contour line respectively, the line connecting the endpoint C and the center point O being a third line segment, the line connecting the endpoint D and the center point O being a fourth line segment, and the included angle formed between the third line segment and the fourth line segment being α3, 0.6(N / 2N2)<α3 / α1<N / 2N2.

[0018] In some embodiments, the magnetic barrier slots are constructed in at least two layers along the radial direction of the rotor core, with each magnetic barrier slot spaced apart, and the number of layers of the second filling slot is the same as the number of layers of the magnetic barrier slots.

[0019] In some embodiments, each of the magnetic barrier slots is equipped with a rotor permanent magnet. Along the radial direction of the rotor core, from the center of the rotor core to the outer surface of the rotor core, the width of the magnetic barrier slot gradually decreases. The width of the rotor permanent magnet in the outermost magnetic barrier slot is c, the width of the rotor permanent magnet in the innermost magnetic barrier slot is d, and the width of the stator permanent magnet (32) is b. (1 / 4)·(N1 / N2)<c / b<(1 / 3)·(N1 / N2), (1 / 3)·(N1 / N2)<d / b<(1 / 2)·(N1 / N2).

[0020] This invention provides a magnetic gear composite motor. By constructing a groove group along the axial direction of the rotor core and filling at least part of the groove group with a first filler material, the first filler material being a conductive but non-magnetic material, when the windings of the stator assembly are energized, the first filler material in the rotor core generates an induced current loop, causing the rotor assembly to rotate under electromagnetic induction, thus realizing the self-starting of the magnetic gear composite motor and quickly reaching a stable speed without the need for a complex controller. Attached Figure Description

[0021] Figure 1 is a schematic diagram of a magnetic gear composite motor according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of the stator assembly of the magnetic gear composite motor according to an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the magnetic adjustment component of the magnetic gear composite motor according to an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of rotor assembly type one of the magnetic gear composite motor according to an embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of rotor assembly type two of the magnetic gear composite motor according to an embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of a magnetic gear composite motor according to an embodiment of the present invention;

[0027] Figure 7 shows the self-starting effect of the magnetic gear composite motor according to an embodiment of the present invention.

[0028] The reference numerals in the attached figures are as follows:

[0029] 1. Rotor assembly; 11. Rotor core; 12. Rotor permanent magnet; 2. Magnetizing assembly; 21. Magnetizing element; 22. Second filler; 23. Screw; 3. Stator assembly; 31. Stator core; 32. Stator permanent magnet; 4. First filling slot; 5. Second filling slot; 6. Magnetic barrier slot. Detailed Implementation

[0030] Referring to Figures 1 to 6, according to an embodiment of the present invention, a magnetic gear composite motor is provided, comprising: a rotor assembly 1, a magnetic adjustment assembly 2, and a stator assembly 3. The magnetic adjustment assembly 2 is fitted outside the rotor assembly 1, and the stator assembly 3 is fitted outside the magnetic adjustment assembly 2. The rotor assembly 1, the magnetic adjustment assembly 2, and the stator assembly 3 are concentrically nested and separated from each other by air gaps. The rotor assembly 1 includes a rotor core 11 and a rotor permanent magnet 12. The rotor permanent magnet 12 is disposed on the rotor core 11. The rotor core 11 has a plurality of groove groups extending along its axial direction. Each groove group is spaced apart along the circumference of the rotor core 11. At least a portion of the groove groups are filled with a first filler material. The first filler material is made of a conductive but non-magnetic material, such as aluminum or copper. In this technical solution, a groove group is constructed along the axial direction of the rotor core 11, and at least part of the groove group is filled with a first filler material. The first filler material is a conductive but non-magnetic material. When the windings of the stator assembly 3 are energized, the first filler material in the rotor core 11 generates an induced current loop, causing the rotor assembly 1 to rotate under electromagnetic induction. This achieves self-starting of the low-speed, high-torque motor and rapid attainment of a stable speed without the need for a complex controller. The rotor permanent magnet 12 can be formed by magnetizing a magnet.

[0031] Preferably, the first filler has a portion extending beyond the two end faces of the rotor core 11 in the axial direction, and the extended portion short-circuits itself. This can further improve the motor's self-starting and rapid achievement of a stable speed.

[0032] In this embodiment, the groove assembly includes a first filling groove 4 with a trapezoidal cross-section. The first filling groove 4 is located near the outer surface of the rotor core 11. At least one magnetic bridge is provided within the first filling groove 4, dividing it into several independent spaces, each filled with a first filler. The proximity of the first filling groove 4 to the outer surface of the rotor core 11 and the presence of magnetic bridges within it help reduce magnetic leakage, improve magnetic field harmonics, and increase the torque of the rotor assembly 1.

[0033] Referring to Figures 4 and 5, the groove assembly also includes a second filling groove 5. Along the circumference of the rotor core 11, second filling grooves 5 are distributed on both sides of the first filling groove 4, and both second filling grooves 5 are filled with the first filler material. This increases the amount of the first filler material, further ensuring that the rotor core 11 can start automatically and quickly reach a stable speed.

[0034] Referring to Figures 4 and 5, the groove assembly also includes a magnetic barrier groove 6. Along the radial direction of the rotor core 11, the magnetic barrier groove 6 is located inside the first filling groove 4. Along the circumferential direction of the rotor core 11, two second filling grooves 5 are located on either side of the magnetic barrier groove 6. The magnetic barrier groove 6 is filled with the first filler or fitted with the rotor permanent magnet 12. This combination of the magnetic barrier groove 6 and the first filler or the rotor permanent magnet 12 allows the motor to operate stably at the required speed.

[0035] Specifically, when the rotor permanent magnet 12 is disposed on the outer surface of the rotor core 11, the magnetic barrier groove 6 is connected to the second filling groove 5, and the magnetic barrier groove 6 is filled with the first filler, as shown in Figure 4. This is the first embodiment of the rotor assembly 1 of this application. In this embodiment, the amount of the first filler is further increased, further ensuring the self-starting performance of the rotor core 11.

[0036] Specifically, when the rotor permanent magnet 12 is assembled in the magnetic barrier slot 6, the magnetic barrier slot 6 is not connected to the second filling slot 5, as shown in Figure 5. This is the second embodiment of the rotor assembly 1 of this application. In this embodiment, the combination design of the magnetic barrier slot 6 and the rotor permanent magnet 12 can increase the reluctance torque of the rotor core 11, increase the starting torque, improve the starting capability, and increase the torque transmitted by the magnetic adjustment assembly 2, thereby achieving low-speed, high-torque output and overall high efficiency. Both of the above embodiments, while ensuring the self-starting performance and large reluctance torque of the motor, allow for the selection of surface-mounted or built-in rotor permanent magnets 12 according to requirements, thus having wider applicability.

[0037] Referring to Figures 1, 3, and 5, the magnetic adjustment assembly 2 includes a magnetic adjustment body 21, which is a hollow cylindrical structure fitted onto the outside of the rotor assembly 1. The magnetic adjustment body 21, also known as a magnetic gear, is used to adjust and improve the magnetic field. Combined with the rotor assembly 1, and with both rotating in the same direction, the magnetic adjustment body 21 enables torque transmission and amplification. As a high-torque output terminal, the magnetic adjustment body 21 achieves dual-speed operation and low-speed high-torque output for the motor. In fixed-frequency applications, this reduces the size of the motor system and lowers system costs; in variable-frequency applications, only a simple frequency adjustment device is needed to achieve motor speed regulation.

[0038] In this embodiment, the magnetizer 21 has multiple receiving grooves arranged at intervals along its circumference. The cross-section of each groove is U-shaped, and the grooves are filled with a second filler 22. The second filler 22 can be a high-strength, high-hardness epoxy resin. Filling the grooves with epoxy resin significantly enhances the structural strength of the magnetizer 21, making it less prone to deformation during operation. A screw 23 penetrates the second filler 22 and connects to the front and rear end plates of the magnetizer 21, thereby achieving overall fixation of the magnetizer assembly 2.

[0039] Referring to Figure 2, the stator assembly 3 includes a stator core 31 and a stator permanent magnet 32. The stator core 31 is fitted onto the outside of the magnet adjusting assembly 2, and the stator permanent magnet 32 ​​is disposed on the inner peripheral wall of the stator core 31. The stator permanent magnet 32 ​​is formed by radially magnetizing steel, which increases the magnetic field strength and improves the output torque of the motor. The magnet adjusting assembly 21 can simultaneously generate magnetic fields for both the rotor permanent magnet 12 and the stator permanent magnet 32, thereby regulating and improving their magnetic fields.

[0040] In one specific implementation, magnetic adjustment teeth are formed between two adjacent receiving slots, and the number of magnetic adjustment teeth is N; the number of stator permanent magnets 32 is even, and each stator permanent magnet 32 ​​is distributed at intervals along the inner peripheral wall of the stator core 31, with stator permanent magnets 32 of different magnetic poles arranged alternately, and the number of pole pairs of the stator permanent magnets 32 is N1; the number of rotor permanent magnets 12 is even, and each rotor permanent magnet 12 is distributed at intervals along the circumference of the rotor core 11, and the number of pole pairs of the rotor permanent magnets 12 is N2. When N = N1 + N2, the magnetic field modulation principle of the magnetic adjustment body 21 can be satisfied, so that the magnetic adjustment body 21 can exert the best magnetic adjustment effect. In particular, regardless of whether the rotor permanent magnets 12 are set on the outer surface of the rotor core 11 or assembled in the magnetic barrier slot 6, the number of pole pairs of the rotor permanent magnets 12 is the same. For example, in Figures 4 and 5, the number of pole pairs of the rotor permanent magnets 12 is two pairs.

[0041] In this embodiment, the rotor assembly 1 and the magnetizing assembly 2 rotate in the same direction. After the motor runs stably, assuming the rotational speed of the rotor assembly 1 is S1 and the rotational speed of the magnetizing assembly 2 is S2, then S1 / S2 = N / N2. This makes the speed ratio fixed, allowing control of the rotational speed of the rotor core 11, so that the magnetizing element 21 outputs torque at the required speed.

[0042] Referring to Figures 3 and 4, when the rotor permanent magnet 12 is disposed on the outer surface of the rotor core 11, the plane containing any cross-section of the rotor core 11 is the reference plane. The vertical projection of the rotor core 11 in the reference plane is the first projection plane, which has a center point O. The vertical projection of the rotor permanent magnet 12 in the reference plane is the second projection plane. The second projection plane and the first projection plane have a curve segment that coincides. The curve segment has an endpoint A and an endpoint B. The line connecting the endpoint A and the center point O is the first line segment, and the line connecting the endpoint B and the center point O is the second line segment. The angle formed between the first line segment and the second line segment is β. The vertical projection of each adjusting tooth in the reference plane is a third projection plane. Each third projection plane has a line of symmetry, and the center point O is located on the line of symmetry. The angle formed between two adjacent lines of symmetry is α1. When 0.7(N / 2N2)<β / α1<N / 2N2 is satisfied, the pole arc angle of the rotor permanent magnet 12 can be limited to ensure the magnetic field distribution range of the rotor permanent magnet 12 in the circumference of the rotor core 11 under different ratios of the number of adjusting teeth, the number of pole pairs of the stator permanent magnet 32, and the number of pole pairs of the rotor permanent magnet 12, thereby increasing torque output and reducing speed fluctuation.

[0043] Referring to Figures 4 and 5, the projections of the two second filling slots 5 onto the reference plane are both fourth projection planes. Each of these four projection planes has a first side extending radially along the rotor core 11. The extensions of the two first sides intersect, forming an angle α2 between them. When 360° / 2N2 ≤ α2 ≤ 180°, the polar arc angle of the second filling slots 5 in the circumferential direction of the rotor core 11 can be limited. This is beneficial for the interaction between the rotor magnetic field and the modulated magnetic field of the tuner 21, increasing the torque transmission effect.

[0044] Referring to Figures 3 to 5, the vertical projection of the rotor core 11 onto the reference plane is the first projection plane, which has a center point O and an outer contour line. The first side is the side of the fourth projection plane away from the magnetic barrier slot 6. The two first sides have endpoints C and D, respectively, close to the outer contour line. The line connecting endpoint C and the center point O is the third line segment, and the line connecting endpoint D and the center point O is the fourth line segment. The included angle between the third and fourth line segments is α3. When 0.6(N / 2N2) < α3 / α1 < N / 2N2 is satisfied, the distribution range of the groove group in the circumferential direction of the rotor core 11 can be limited, thereby reducing harmonics, shortening the time for the rotor assembly 1 and the magnetic adjustment assembly 2 to reach a stable speed from self-starting, and reducing the speed fluctuation of the rotor assembly 1 and the magnetic adjustment assembly 2.

[0045] Referring to Figures 5 and 6, the magnetic barrier slots 6 are constructed in at least two layers along the radial direction of the rotor core 11, with each magnetic barrier slot 6 spaced apart. The number of layers of the second filling slot 5 is the same as the number of layers of the magnetic barrier slots 6. The multi-layer structure of the magnetic barrier slots 6 ensures that the rotor core 11 has a large reluctance torque. Furthermore, regardless of whether the rotor permanent magnets 12 are disposed on the outer surface of the rotor core 11 or assembled within the magnetic barrier slots 6, the opposing rotor permanent magnets 12 are all centrally symmetrical with respect to the central axis of the rotor core 11. This arrangement helps to reduce air gap magnetic flux density harmonics, increase the torque transmission effect, and enable the magnetizing assembly 2 to output a larger torque.

[0046] Referring to Figures 2 and 5, when rotor permanent magnets 12 are assembled in each magnetic barrier slot 6, the width of the magnetic barrier slot 6 gradually decreases along the radial direction of the rotor core 11 from the center of the rotor core 11 to the outer surface of the rotor core 11. The width of the rotor permanent magnet 12 in the outermost magnetic barrier slot 6 is c, the width of the rotor permanent magnet 12 in the innermost magnetic barrier slot 6 is d, and the width of the stator permanent magnet 32 ​​is b. When (1 / 4)·(N1 / N2)<c / b<(1 / 3)·(N1 / N2) and (1 / 3)·(N1 / N2)<d / b<(1 / 2)·(N1 / N2) are satisfied, the width of the rotor permanent magnet 12 can be limited at different layers to ensure that the rotor permanent magnet 12 is used in sufficient quantities and has a large torque output and torque transmission capability under different ratios of the number of tuning teeth, the number of pole pairs of stator permanent magnet 32, and the number of pole pairs of rotor permanent magnet 12.

[0047] Figure 7 shows the self-starting effect of the magnetic gear composite motor according to an embodiment of the present invention. The horizontal axis represents time, and the vertical axis represents speed. The high-speed rotor is the rotor assembly 1 of the present invention, and the low-speed rotor is the magnetic adjustment assembly 2 of the present invention. After the magnetic gear composite motor starts, in the initial stage, the speed fluctuations of the high-speed rotor and the low-speed rotor are large. As time goes by, when the high-speed rotor and the low-speed rotor run stably, their speed fluctuations gradually decrease and tend to stabilize.

[0048] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A magnetic gear composite motor, characterized in that, The system includes a rotor assembly (1), a magnetizing assembly (2), and a stator assembly (3). The magnetizing assembly (2) is fitted onto the outside of the rotor assembly (1), and the stator assembly (3) is fitted onto the outside of the magnetizing assembly (2). The rotor assembly (1) includes a rotor core (11) and a rotor permanent magnet (12). The rotor permanent magnet (12) is disposed on the rotor core (11). The rotor core (11) has a plurality of groove groups extending along its axial direction. Each groove group is spaced apart along the circumference of the rotor core (11). At least a portion of the groove groups are filled with a first filler material, which is a conductive but non-magnetic material. Each groove group includes a first filling groove (4), which is close to the outer circumferential surface of the rotor core (11). The slot group also includes a second filling slot (5). Along the circumferential direction of the rotor core (11), the second filling slot (5) is distributed on both sides of the first filling slot (4). The rotor permanent magnet (12) has an even number. Each rotor permanent magnet (12) is distributed at intervals along the circumferential direction of the rotor core (11). The number of pole pairs of the rotor permanent magnet (12) is N2. The plane where any cross section of the rotor core (11) is located is the reference plane. The projections of the two second filling slots (5) in the reference plane are both fourth projection planes. Both of the second fourth projection planes have a first side. The first side extends radially along the rotor core (11). The extension lines of the two first sides intersect. The included angle formed between the two first sides is α2, 360° / 2N2≤α2≤180°.

2. The magnetic gear composite motor according to claim 1, characterized in that, The portion of the first filler outside the rotor core (11) is short-circuited.

3. The magnetic gear composite motor according to claim 1, characterized in that, At least one magnetic bridge is provided in the first filling groove (4), and each magnetic bridge divides the first filling groove (4) into several independent spaces, and each independent space is filled with the first filler.

4. The magnetic gear composite motor according to claim 3, characterized in that, Both of the second filling slots (5) are filled with the first filler.

5. The magnetic gear composite motor according to claim 4, characterized in that, The groove group also includes a magnetic barrier groove (6) along the radial direction of the rotor core (11). The magnetic barrier groove (6) is located inside the first filling groove (4). Along the circumferential direction of the rotor core (11), two second filling grooves (5) are located on both sides of the magnetic barrier groove (6). The magnetic barrier groove (6) is filled with the first filler.

6. The magnetic gear composite motor according to claim 5, characterized in that, The rotor permanent magnet (12) is disposed on the outer circumferential surface of the rotor core (11), and the magnetic barrier groove (6) is connected to the second filling groove (5).

7. The magnetic gear composite motor according to claim 4, characterized in that, The groove group also includes a magnetic barrier groove (6). Along the radial direction of the rotor core (11), the magnetic barrier groove (6) is located inside the first filling groove (4). Along the circumferential direction of the rotor core (11), two second filling grooves (5) are located on both sides of the magnetic barrier groove (6). The rotor permanent magnet (12) is assembled in the magnetic barrier groove (6). The magnetic barrier groove (6) is not connected to the second filling groove (5).

8. The magnetic gear composite motor according to claim 6 or 7, characterized in that, The magnet adjustment assembly (2) includes a magnet adjustment body (21), which is fitted onto the outside of the rotor assembly (1).

9. The magnetic gear composite motor according to claim 8, characterized in that, The magnetizer (21) has a plurality of receiving slots arranged at intervals along the circumference of the magnetizer (21). The receiving slots are filled with a second filler (22) to enhance the strength of the magnetizer (21).

10. The magnetic gear composite motor according to claim 9, characterized in that, A magnetic adjustment tooth is formed between two adjacent receiving slots, and the number of the magnetic adjustment tooth is N; the stator assembly (3) includes a stator core (31) and a stator permanent magnet (32). The stator core (31) is fitted on the outside of the magnetic adjustment assembly (2). The number of the stator permanent magnet (32) is an even number. Each stator permanent magnet (32) is distributed at intervals along the inner peripheral wall of the stator core (31). The stator permanent magnets (32) with different magnetic poles are arranged alternately. The number of pole pairs of the stator permanent magnet (32) is N1; N = N1 + N2.

11. The magnetic gear composite motor according to claim 10, characterized in that, The rotor assembly (1) and the magnetic adjustment assembly (2) rotate in the same direction. The rotational speed of the rotor assembly (1) is S1, and the rotational speed of the magnetic adjustment assembly (2) is S2. S1 / S2=N / N2.

12. The magnetic gear composite motor according to claim 10, characterized in that, When the rotor permanent magnet (12) is disposed on the outer circumferential surface of the rotor core (11), the vertical projection of the rotor core (11) in the reference plane is the first projection plane, the first projection plane has a center point O, the vertical projection of the rotor permanent magnet (12) in the reference plane is the second projection plane, the second projection plane and the first projection plane have a curve segment that coincides, the curve segment has an endpoint A and an endpoint B, the line connecting the endpoint A and the center point O is the first line segment, the line connecting the endpoint B and the center point O is the second line segment, the included angle formed between the first line segment and the second line segment is β, the vertical projection of each of the magnetic adjustment teeth in the reference plane is the third projection plane, each of the third projection planes has a symmetry line, the center point O is located on the symmetry line, the included angle formed between two adjacent symmetry lines is α1, 0.7(N / 2N2) < β / α1 < N / 2N2.

13. The magnetic gear composite motor according to claim 12, characterized in that, The first projection surface also has an outer contour line. The first side is the side of the fourth projection surface away from the magnetic barrier groove (6). The two first sides have endpoints C and D close to the outer contour line. The line connecting the endpoint C and the center point O is the third line segment. The line connecting the endpoint D and the center point O is the fourth line segment. The included angle between the third line segment and the fourth line segment is α3, 0.6(N / 2N2) < α3 / α1 < N / 2N2.

14. The magnetic gear composite motor according to claim 10, characterized in that, Along the radial direction of the rotor core (11), the magnetic barrier groove (6) is constructed in at least two layers, and each magnetic barrier groove (6) is spaced apart. The number of layers of the second filling groove (5) is the same as the number of layers of the magnetic barrier groove (6).

15. The magnetic gear composite motor according to claim 14, characterized in that, Each of the magnetic barrier slots (6) is equipped with a rotor permanent magnet (12). Along the radial direction of the rotor core (11), from the center of the rotor core (11) to the outer surface of the rotor core (11), the width of the magnetic barrier slot (6) gradually decreases. The width of the rotor permanent magnet (12) in the outermost magnetic barrier slot (6) is c, the width of the rotor permanent magnet (12) in the innermost magnetic barrier slot (6) is d, and the width of the stator permanent magnet (32) is b. (1 / 4)•(N1 / N2)<c / b<(1 / 3)•(N1 / N2), (1 / 3)•(N1 / N2)<d / b<(1 / 2)•(N1 / N2).

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