Non-contact axial flux vector reluctance motor
Through split modular design and contactless drive technology, the non-contact axial flux vector reluctance motor is solved, and the problems of high manufacturing cost, heat accumulation and maintenance difficulties are achieved, and a motor design with high power density, low cost and easy maintenance are achieved.
Patent Information
- Application Number
- CN202422395272.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing axial flux motors have problems such as high manufacturing costs, complex processes, and difficulty in heat accumulation and maintenance.
A contactless axial flux vector reluctance motor with split modular design is adopted, combined with contactless drive technology, allowing radial jump between the rotor and the stator, and an axial flux structure is adopted to increase power density, and reduce torque pulsation through optimized magnetic circuit design.
It improves the stability and shock resistance of the motor, reduces manufacturing costs, enhances heat dissipation effect, simplifies the maintenance process, adapts to complex working conditions and has no mechanical losses.
Smart Images
Figure CN223156776U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and specifically relates to a non-contact axial flux vector reluctance motor. Background Technique
[0002] Traditional reluctance motors generally have a radial flux structure, and the magnetic field direction is perpendicular to the motor axis. However, with the increasing demand for higher power density and compact structure, axial flux disc motors have gradually attracted attention. Compared with the radial flux structure, the axial flux disc structure has the advantages of small volume, light weight, and easy cooling.
[0003] However, the existing axial flux motors have the following defects. First, axial flux motors usually use permanent magnetic materials or complex structural designs, resulting in high manufacturing costs and complex processes. Second, due to the magnetic flux path and structural design of the reluctance motor, heat accumulation is likely to occur, affecting the long-term stable operation of the motor. Third, due to the compact structure of traditional reluctance motors, difficulties are often faced in maintenance, disassembly, and assembly. Therefore, optimizing the axial flux motor to solve the above problems is exactly the technical problem to be solved by this application. Content of the Utility Model
[0004] In view of the deficiencies of the existing technology, the utility model proposes a non-contact axial flux vector reluctance motor. Its stator and rotor adopt a split modular design, and at the same time, a non-contact vector reluctance drive technology is adopted. The motor rotor assembly is connected to the equipment rotating shaft or coupling, allowing a certain amount of radial runout between the rotating shaft and the motor without affecting the normal operation of the motor, improving the stability of the motor operation and the service life of the equipment. By adopting axial flux, the power density of the motor is further improved. Through optimizing the magnetic circuit design and the multi-tooth structure of the motor, the torque ripple is reduced, the motor efficiency is improved, and the manufacturing cost is reduced at the same time.
[0005] The technical solution of the utility model is as follows:
[0006] A non-contact axial flux vector reluctance motor includes an end cover and a machine shell, and the end cover and the machine shell are separated.
[0007] A stator assembly is arranged inside the machine shell, and a plurality of winding coils arranged circumferentially are arranged on the stator assembly. Each winding coil is wound in a radial plane and is used to generate a magnetic field in the axial plane.
[0008] The end cover is in a cylindrical shape, and a rotor assembly is fixedly arranged inside the end cover. The rotor assembly is used to cooperate with the magnetic field in the axial plane and rotate around the central axis of the end cover. A connecting portion for connecting an external device is arranged on the side of the end cover facing away from the machine shell.
[0009] In summary, the above technical solution has the following beneficial effects: This patent proposes a non-contact axial flux vector reluctance motor. The rotor assembly is connected to an external device through a connecting part on the end cover. The housing is placed on one side of the end cover, aligning the central axes of the housing and the end cover. The winding coils in the housing generate a changing axial magnetic field, thereby driving the rotor assembly to rotate circumferentially. This application adopts a split modular design for the stator assembly and rotor assembly of the disc motor, and at the same time adopts a non-contact drive design, improving the seismic resistance of the motor, allowing a certain radial runout between the rotor and the stator during operation, and having no mechanical loss, making it more adaptable to complex working conditions. In addition, compared with traditional motors with a radial flux structure, the axial flux vector reluctance motor has a higher power density; it has no rare earth permanent magnets, is more resistant to high temperature and impact, has no demagnetization risk, and has a lower comprehensive cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 FIG. is a schematic cross-sectional view of a non-contact axial flux vector reluctance motor;
[0011] Figure 2 FIG. is an exploded view schematic of a non-contact axial flux vector reluctance motor;
[0012] Figure 3 FIG. is a schematic view of the rotor assembly of a non-contact axial flux vector reluctance motor;
[0013] Figure 4 FIG. is a schematic view of the end cover of a non-contact axial flux vector reluctance motor;
[0014] Figure 5 FIG. is a schematic view of the stator assembly of a non-contact axial flux vector reluctance motor;
[0015] Figure 6 FIG. is a schematic view of the small teeth of a non-contact axial flux vector reluctance motor.
[0016] Reference numerals: 10, end cover; 11, rotor slot; 12, connecting hole; 20, housing; 30, stator assembly; 31, inner stator shell; 32, stator yoke; 33, stator teeth; 34, small teeth; 40, winding coils; 50, rotor assembly; 51, rotor yoke; 52, rotor teeth; 60, external device. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The following further describes the present utility model in detail with reference to the drawings and embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.
[0018] As Figure 1 and Figure 2 shown, a non-contact axial flux vector reluctance motor includes an end cover 10 and a housing 20, which are separately arranged; a stator assembly 30 is arranged inside the housing 20, and a plurality of winding coils 40 arranged circumferentially are arranged on the stator assembly 30. Each winding coil 40 is wound in a radial plane and is used to generate a magnetic field in the axial plane; the end cover 10 is in a cylindrical shape, and a rotor assembly 50 is fixedly arranged inside the end cover 10. The rotor assembly 50 is used to cooperate with the magnetic field in the axial plane and rotate around the central axis of the end cover 10. A connection part for connecting an external device 60 is provided on the side of the end cover 10 facing away from the housing 20. This patent proposes a non-contact axial flux vector reluctance motor. The rotor assembly 50 is connected to the external device 60 through the connection part on the end cover 10. The housing 20 is placed on one side of the end cover 10, aligning the central axes of the housing 20 and the end cover 10. The winding coils 40 inside the housing 20 generate a changing axial magnetic field, thereby driving the rotor assembly 50 to rotate circumferentially. In this application, the stator assembly 30 and the rotor assembly 50 of the disc motor adopt a split modular design, and at the same time adopt a non-contact drive design, improving the seismic resistance of the motor, allowing a certain radial runout between the rotor and the stator during operation, and having no mechanical loss, making it more adaptable to complex working conditions. In addition, compared with the traditional motor adopting a radial flux structure, the axial flux vector reluctance motor has a higher power density; it has no rare earth permanent magnets, is more resistant to high temperature and impact, has no demagnetization risk, and has a lower comprehensive cost.
[0019] As Figure 3 and Figure 4 shown, one side of the end cover 10 has a rotor slot 11, which is used to arrange the rotor assembly 50. The connection part is arranged on the side of the end cover 10 facing away from the rotor slot 11, and the connection part is a plurality of connection holes 12. The connection part can be connected to the external device 60 through a rotating shaft or a coupling, or it can be the connection holes 12 opened on the end cover 10. Preferably, the connection part is the connection holes 12 opened on the end cover 10.
[0020] The connection holes 12 are evenly arranged around the circumference of the end cover 10. The connection holes 12 are evenly arranged along the circumference of the end cover 10, which can make the connection of the end cover 10 to the external component more firm. Correspondingly, the external component includes a connection disk, and a plurality of assembly holes corresponding to the connection holes 12 are opened on the connection disk.
[0021] The connection holes 12 are threaded holes or straight holes. With the design of threaded holes, the end cover 10 can be directly fixed to the connection disk with bolts. If the design of straight holes is adopted, bolts and nuts are needed to fix the end cover 10 and the connection disk together.
[0022] The rotor assembly 50 includes a rotor yoke 51 and a plurality of rotor teeth 52. The rotor yoke 51 is fixedly arranged in the end cover 10. Each rotor tooth 52 is arranged on one side of the rotor yoke 51 facing away from the end cover 10. The rotor teeth 52 are evenly arranged circumferentially on the rotor yoke 51 and all extend radially. The end cover 10 and the rotor assembly 50 can be provided in two sets, which are respectively arranged on both sides of the housing 20, so as to realize bidirectional power output.
[0023] The rotor yoke 51 is in the shape of a concentric circular ring, and the length of the rotor tooth 52 is equal to the width of the concentric circular ring-shaped rotor yoke 51. The rotor tooth 52 is a permanent magnet. The rotor tooth 52 extends radially in a strip shape, and the rotor tooth 52 rotates through a magnetic field with the change of the minimum reluctance away from the fit. The width of the concentric circular ring-shaped rotor yoke 51 is the radius of the large circle minus the radius of the small circle.
[0024] As Figure 5 shown, the stator assembly 30 includes a stator inner shell 31, a stator yoke 32 and a plurality of stator teeth 33. The stator inner shell 31 is arranged in the housing 20. The stator inner shell 31 is in the shape of a cylinder with stator slots. The stator yoke 32 is in the shape of a concentric circular ring. The stator yoke 32 is fixedly arranged in the stator slots. Each stator tooth 33 is arranged on one side of the stator yoke 32 facing away from the stator inner shell 31 and is evenly arranged circumferentially along the concentric circular ring-shaped stator yoke 32. The winding coil 40 is wound around each stator tooth 33, so as to form a coil in the radial plane and is used to generate a magnetic field in the axial plane. The stator inner shell 31 is used to fix the stator yoke 32 and the stator teeth 33 and fix the stator yoke 32 and the stator teeth 33 in the housing 20.
[0025] The height of the stator tooth 33 in the axial direction plus the height of the stator yoke 32 in the axial direction is equal to the depth of the stator slot.
[0026] The diameter of the stator inner shell 31 is equal to the diameter of the end cover 10. The width of the stator yoke 32 is equal to the width of the rotor yoke 51.
[0027] As Figure 6 shown, a plurality of small teeth 34 extending radially are arranged on each stator tooth 33.
[0028] A fan is arranged on the housing. A cooling system such as an air cooling system or a water cooling system can be externally connected to the housing to cool the motor.
[0029] In summary, the advantages of a non-contact axial-flux vector reluctance motor of the present application include: 1. Compared with traditional motors with a radial-flux structure, the axial-flux vector reluctance motor of the present application has a higher power density, enabling it to output higher power under the same volume, suitable for occasions with strict requirements for high power density such as electric vehicles and aerospace. It has no rare-earth permanent magnets, is more resistant to high temperature and impact, has no demagnetization risk, and has a lower overall cost. 2. By adopting the reluctance principle, the present patent simplifies the structural design of the motor, reduces the dependence on high-cost permanent magnet materials, thereby significantly reducing the manufacturing cost and process complexity. 3. The present patent can design an efficient air-cooling system on the motor housing. Through reasonably arranged air ducts and fans, the heat dissipation effect is enhanced, ensuring temperature management of the motor during high-load operation and extending the service life of the motor. 4. Through modular design, the stator and rotor parts of the motor can be easily disassembled, assembled, and maintained, reducing the maintenance cost and improving the reliability of the motor.
[0030] The above is only the preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.
Claims
1. A non-contact axial flux vector reluctance motor, characterized in that, It includes an end cover (10) and a housing (20), and the end cover (10) and the housing (20) are separately arranged; A stator assembly (30) is arranged in the housing (20), and a number of winding coils (40) arranged circumferentially are provided on the stator assembly (30). Each of the winding coils (40) is wound in a radial plane and is used to generate a magnetic field in the axial plane; The end cover (10) is in a cylindrical shape, and a rotor assembly (50) is fixedly arranged in the end cover (10). The rotor assembly (50) is used to cooperate with the magnetic field in the axial plane and rotate around the central axis of the end cover (10). A connection part for connecting an external device (60) is provided on the side of the end cover (10) facing away from the housing (20).
2. The non-contact axial flux vector reluctance motor according to claim 1, characterized in that, One side of the end cover (10) has a rotor slot (11), and the rotor slot (11) is used to arrange the rotor assembly (50). The connection part is arranged on the side of the end cover (10) facing away from the rotor slot (11), and the connection part is a number of connection holes (12).
3. The non-contact axial flux vector reluctance motor according to claim 2, characterized in that, The connection holes (12) are evenly arranged around the circumference of the end cover (10).
4. The non-contact axial flux vector reluctance motor according to claim 2, characterized in that, The connection holes (12) are threaded holes or straight holes.
5. A non-contact axial flux vector reluctance motor according to claim 1, characterized in that, The rotor assembly (50) includes a rotor yoke (51) and a number of rotor teeth (52). The rotor yoke (51) is fixedly arranged in the end cover (10). Each of the rotor teeth (52) is arranged on the side of the rotor yoke (51) facing away from the end cover (10). Each of the rotor teeth (52) is evenly arranged circumferentially on the rotor yoke (51) and extends radially.
6. The non-contact axial flux vector reluctance motor according to claim 5, characterized in that, The rotor yoke (51) is in a concentric circular ring shape, and the length of the rotor teeth (52) is equal to the width of the concentric circular ring-shaped rotor yoke (51).
7. The non-contact axial flux vector reluctance motor according to claim 1, characterized in that, The stator assembly (30) includes a stator inner shell (31), a stator yoke (32) and a number of stator teeth (33). The stator inner shell (31) is arranged in the housing (20). The stator inner shell (31) is in a cylindrical shape with stator slots. The stator yoke (32) is in a concentric circular ring shape. The stator yoke (32) is fixedly arranged in the stator slots. Each of the stator teeth (33) is arranged on the side of the stator yoke (32) facing away from the stator inner shell (31) and is evenly arranged along the circumference of the concentric circular ring-shaped stator yoke (32). The winding coils (40) are wound on each of the stator teeth (33) to form coils in the radial plane and are used to generate a magnetic field in the axial plane.
8. The non-contact axial flux vector reluctance motor according to claim 7, characterized in that The height of the stator teeth (33) in the axial direction plus the height of the stator yoke (32) in the axial direction is equal to the depth of the stator slots.
9. The non-contact axial flux vector reluctance motor according to claim 7, wherein The diameter of the stator inner shell (31) is equal to the diameter of the end cover (10).
10. A non-contact axial flux vector reluctance motor according to claim 7, characterized in that, A number of small teeth (34) extending radially are provided on each of the stator teeth (33).