Dual-redundancy large-torque axial flux motor

Abstract

The utility model discloses a dual-redundancy large-torque axial flux motor. The dual-redundancy large-torque axial flux motor comprises a first axial flux motor unit and a second axial flux motor unit, the first axial magnetic flux motor unit comprises a first rotor assembly (1), a first stator assembly (2) and a second rotor assembly (3), and the first stator assembly (2) is located between the first rotor assembly (1) and the second rotor assembly (3); the second axial magnetic flux motor unit comprises a third rotor assembly (5), a second stator assembly (6) and a fourth rotor assembly (7), and the second stator assembly (6) is located between the third rotor assembly (5) and the fourth rotor assembly (7); the utility model has a wide application prospect in the aviation field, and is particularly suitable for aircrafts such as electric vertical take-off and landing aircrafts with higher requirements on reliability, safety and performance, such as the electric vertical take-off and landing aircrafts.

Description

Technical Field

[0001] The utility model relates to an axial flux motor, in particular to a dual-redundancy large-torque axial flux motor. Background Art

[0002] At present, axial flux motors have significant advantages in the application of electric vertical takeoff and landing (eVTOL) aircraft, including high efficiency, high power density, low noise, high reliability, small size, and electrification. These advantages make axial flux motors one of the indispensable key components in eVTOL aircraft.

[0003] Most of these axial flux motors adopt a structure of 2 outer stators and 1 inner rotor. This device has the following disadvantages: when the propeller of an eVTOL aircraft is driven by only one motor, if the motor overheats and fails, the propeller will no longer be able to provide power, which may lead to the loss of control or crash of the aircraft. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a dual-redundancy large-torque axial flux motor for the deficiencies of the prior art.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A dual-redundancy large-torque axial flux motor includes a first axial flux motor unit and a second axial flux motor unit; the first axial flux motor unit includes a first rotor assembly 1, a first stator assembly 2, and a second rotor assembly 3, and the first stator assembly 2 is located between the first rotor assembly 1 and the second rotor assembly 3; the second axial flux motor unit includes a third rotor assembly 5, a second stator assembly 6, and a fourth rotor assembly 7, and the second stator assembly 6 is located between the third rotor assembly 5 and the fourth rotor assembly 7; the control systems of the first axial flux motor unit and the second axial flux motor unit are independent of each other; the first rotor assembly 1, the first stator assembly 2, the second rotor assembly 3, the cooling fan 4, the third rotor assembly 5, the second stator 6, and the fourth rotor assembly 7 are sequentially installed on the rotating shaft 9, the first stator assembly 2 and the second stator assembly 6 are fixed to the motor housing together, and the first rotor assembly 1, the second rotor assembly 3, the cooling fan 4, the third rotor assembly 5, and the fourth rotor assembly 7 are fixed to the rotating shaft 9; the first stator assembly 2 and the second stator assembly 6 are both inner stators, and the first rotor assembly 1, the second rotor assembly 3, the third rotor assembly 5, and the fourth rotor assembly 7 are all inner rotors.

[0007] For the axial flux motor described above, the first rotor assembly 1, the first stator assembly 2, the second rotor assembly 3, the cooling fan 4, the third rotor assembly 5, the second stator assembly 6, and the fourth rotor assembly 7 are sequentially assembled on the same rotating shaft 9.

[0008] For the axial flux motor described above, the first stator assembly 2 and the second stator assembly 6 are fixed to the motor housing through the stator fixing plate 14 and remain stationary during operation.

[0009] For the axial flux motor described above, the first rotor assembly 1, the second rotor assembly 3, the cooling fan 4, the third rotor assembly 5, and the fourth rotor assembly 7 are successively fixed on the rotating shaft 9 and rotate with the rotating shaft 9 during operation.

[0010] For the axial flux motor described above, the first rotor assembly 1, the second rotor assembly 3, the third rotor assembly 5, and the fourth rotor assembly 7 all have the same inner rotor structure, including: a rotor disc 10, a plurality of rotor magnets 11 mounted on the rotor disc 10, a rotor fixing sleeve 13 at the center of the rotor disc 10, and a rotor fixing pin 12 provided inside the rotor fixing sleeve 13. The rotor assembly is fixed to the rotating shaft 9 through the rotor fixing pin.

[0011] For the axial flux motor described above, the first stator assembly 2 and the second stator assembly 6 have the same structure: including a stator core 15, a stator core winding 16, and a stator bearing 17. The outer edge of the stator core 15 is a stator fixing plate 14, and the stator core is fixed to the housing through the stator fixing plate 14.

[0012] For the axial flux motor described above, a heat dissipation port is provided on the motor housing 8.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. Efficient heat dissipation design: The cooling fan is placed between the second stator and the third stator to ensure that the heat generated during the operation of the motor can be effectively discharged, thereby avoiding overheating of the motor and extending the service life of the motor;

[0015] 2. Redundant design improves reliability: The motor is composed of two sets of independent axial flux motors assembled on the same rotating shaft, allowing independent control of the two motors. When one motor group fails or its performance deteriorates, the other motor can continue to operate, thus ensuring the continuous rotation and propulsion force of the propeller and significantly improving the reliability and safety of the system;

[0016] 3. Compact structure and small volume: The design of the axial flux motor enables the two motors to be compactly integrated into the same system, reducing the requirements for space and weight, which is particularly important for electric vertical takeoff and landing aircraft because aircraft have strict restrictions on weight and space;

[0017] 4. Heat dissipation holes on the housing enhance heat dissipation: The heat dissipation holes provided on the motor housing can further increase the heat dissipation effect and ensure that the motor can maintain stable performance even during long-term operation or high-load conditions;

[0018] 5. Reduced long-term maintenance costs: Although the dual-motor system may increase some weight compared to the single-motor system, due to its high reliability and redundant design, it can reduce the downtime and maintenance costs caused by motor failures during long-term operation. In the long run, the maintenance costs will be effectively reduced;

[0019] 6. Simple structure and easy assembly: The structure of the present utility model is designed simply. It only needs to arrange two groups of independent axial motors inside the flux motor and perform simple assembly, without the need for special design changes. This reduces the production and manufacturing costs, and at the same time improves the efficiency and reliability of assembly;

[0020] The present utility model has broad application prospects in the aviation field, and is particularly suitable for aircraft such as electric vertical takeoff and landing aircraft that have high requirements for reliability, safety, and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the internal structure of the dual-redundancy high-reliability high-torque axial flux motor of the present utility model;

[0022] 1. First rotor assembly, 2. First stator assembly, 3. Second rotor assembly, 4. Cooling fan, 5. Third rotor assembly, 6. Second stator assembly, 7. Fourth rotor assembly, 8. Motor housing, 9. Rotating shaft.

[0023] Figure 2 is a schematic diagram of the rotor assembly structure of the dual-redundancy high-reliability high-torque axial flux motor of the present utility model;

[0024] 10. The rotor assembly includes a rotor disc, 11. Rotor magnets, 12. Rotor fixing pins, 13. Rotor fixing sleeves

[0025] Figure 3 is a schematic diagram of the stator assembly structure of the dual-redundancy high-reliability high-torque axial flux motor of the present utility model;

[0026] 14. Stator fixing disc, 15. Stator iron core, 16. Stator iron core winding, 17. Stator bearing

[0027] Figure 4 is a schematic diagram of the cooling fan structure of the dual-redundancy high-reliability high-torque axial flux motor of the present utility model; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will describe the present utility model in detail with reference to specific embodiments.

[0029] Reference Figure 1, A dual-redundancy high-torque axial flux motor, comprising a first axial flux motor unit and a second axial flux motor unit; the first axial flux motor unit includes a first rotor assembly 1, a first stator assembly 2, and a second rotor assembly 3, and the first stator assembly 2 is sandwiched between the first rotor assembly 1 and the second rotor assembly 3; the second axial flux motor unit includes a third rotor assembly 5, a second stator assembly 6, and a fourth rotor assembly 7, and the second stator assembly 6 is sandwiched between the third rotor assembly 5 and the fourth rotor assembly 7; the control systems of the first axial flux motor unit and the second axial flux motor unit are independent of each other; the first rotor assembly 1, the first stator assembly 2, the second rotor assembly 3, the cooling fan 4, the third rotor assembly 5, the second stator assembly 6, and the fourth rotor assembly 7 are sequentially installed on the rotating shaft 9.

[0030] The above-mentioned rotor assemblies have the same structure, including: a rotor disc 10, a plurality of rotor permanent magnets 11 installed on the rotor disc 10, the center of the rotor disc 10 is a rotor fixing sleeve 13, and a rotor fixing pin 12 is arranged inside the rotor fixing sleeve 13, and the rotor assembly is fixed on the rotating shaft 9 through the rotor fixing pin.

[0031] The above-mentioned stator assemblies have the same structure: including a stator core 15, a stator core winding 16, and a stator bearing 17. The outer edge of the stator core 15 is a stator fixing disc 14, and the stator core is fixed to the outer shell through the stator fixing disc 14.

[0032] Axial flux motor assembly: The first rotor assembly, the first stator assembly, the second rotor assembly, the cooling fan, the third rotor assembly, the second stator assembly, and the fourth rotor assembly are assembled on the same rotating shaft. The first stator assembly and the second stator assembly are fixed to the motor housing through the stator fixing disc. The first rotor assembly, the second rotor assembly, the cooling fan, the third rotor assembly, and the fourth rotor assembly are sequentially fixed on the rotating shaft and rotate with the rotating shaft during operation, constituting a dual-redundancy and high-reliability axial flux motor;

[0033] Conversion of electrical energy to mechanical energy: The rotation of the rotor is driven by the interaction of the magnetic fields between the stator and the rotor, thereby realizing the conversion of electrical energy to mechanical energy;

[0034] Redundancy design and fault response: Since the motor internally contains two sets of independent axial flux motors, when one set fails, the other set can continue to work. When the monitoring system detects the failure of a certain set of axial flux motors through common detection methods (such as sensors or monitoring systems) currently, the control system will start the fault-free axial flux motor to work, and the faulty motor will rotate passively following the fault-free motor. In this way, the vertical aircraft can continue to maintain a stable lift and achieve safe flight. This design greatly improves the reliability and safety of the aircraft.

[0035] It should be understood that those of ordinary skill in the art can make improvements or modifications according to the above description, and all such improvements and modifications shall fall within the protection scope of the appended claims of this utility model.

Claims

1. A double-redundant high-torque axial flux motor, characterized in that: The invention comprises a first axial flux motor unit and a second axial flux motor unit; the first axial flux motor unit comprises a first rotor assembly (1), a first stator assembly (2) and a second rotor assembly (3), wherein the first stator assembly (2) is located between the first rotor assembly (1) and the second rotor assembly (3); the second axial flux motor unit comprises a third rotor assembly (5), a second stator assembly (6) and a fourth rotor assembly (7), wherein the second stator assembly (6) is located between the third rotor assembly (5) and the fourth rotor assembly (7); the control systems of the first axial flux motor unit and the second axial flux motor unit are independent of each other; the first rotor assembly (1), the first stator assembly (2) and the second stator assembly (6) are located between the third rotor assembly (5) and the fourth rotor assembly (7); the control systems of the first axial flux motor unit and the second axial flux motor unit are independent of each other; the first rotor assembly (1), the first stator assembly (2) and the second stator assembly (6) are located between the first rotor assembly (1) and the second stator ... The first rotor assembly (2), the second rotor assembly (3), the cooling fan (4), the third rotor assembly (5), the second stator assembly (6), and the fourth rotor assembly (7) are sequentially mounted on the rotating shaft (9); the first stator assembly (2) and the second stator assembly (6) are fixed to the motor housing; the first rotor assembly (1), the second rotor assembly (3), the cooling fan (4), the third rotor assembly (5), and the fourth rotor assembly (7) are fixed to the rotating shaft (9); the first stator assembly (2) and the second stator assembly (6) are both inner stators, and the first rotor assembly (1), the second rotor assembly (3), the third rotor assembly (5), and the fourth rotor assembly (7) are all inner rotors.

2. The axial flux motor according to claim 1, characterized in that: The first rotor assembly (1), the first stator assembly (2), the second rotor assembly (3), the cooling fan (4), the third rotor assembly (5), the second stator assembly (6), and the fourth rotor assembly (7) are sequentially assembled on the same rotating shaft (9).

3. The axial flux motor according to claim 1, characterized in that: The first stator assembly (2) and the second stator assembly (6) are fixed to the motor housing via a stator fixing plate (14) and remain fixed during operation.

4. The axial flux motor according to claim 1, characterized in that: The first rotor assembly (1), the second rotor assembly (3), the cooling fan (4), the third rotor assembly (5), and the fourth rotor assembly (7) are fixed on the rotating shaft (9) in sequence and rotate along with the rotating shaft (9) during operation.

5. The axial flux motor according to claim 1, characterized in that: The first rotor assembly (1), the second rotor assembly (3), the third rotor assembly (5) and the fourth rotor assembly (7) have the same internal rotor structure, comprising: a rotor disk (10), a plurality of rotor magnets (11) mounted on the rotor disk (10), a rotor fixing sleeve (13) at the center of the rotor disk (10), a rotor fixing pin (12) being arranged inside the rotor fixing sleeve (13), and the rotor assembly is fixed on the rotating shaft (9) by the rotor fixing pin.

6. The axial flux motor according to claim 1, characterized in that: The first stator assembly (2) and the second stator assembly (6) have the same structure: they include a stator core (15), a stator core winding (16), and a stator bearing (17); the outer edge of the stator core (15) is a stator fixing plate (14), and the stator core and the housing are fixed together via the stator fixing plate (14).

7. The axial flux motor according to claim 1, characterized in that: The motor housing (8) is provided with a heat dissipation opening.

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