Axial flux motor and vehicle

Abstract

The utility model discloses an axial magnetic flux motor and a vehicle, and the axial magnetic flux motor comprises a housing which is internally provided with a motor mandrel; the stator and rotor modules are arranged in the shell, each stator and rotor module comprises a stator module and a rotor module, the stator module is connected with the rotor module, the rotor module is in transmission connection with the motor mandrel, the number of the stator and rotor modules is multiple, and the stator and rotor modules are arranged in the shell. And the plurality of stator and rotor modules are sequentially connected in series along the axis direction of the motor mandrel. Compared with the prior art, the stator and rotor modules which are sequentially connected in series along the axis direction of the motor mandrel are arranged in the shell, so that serial connection between a plurality of stators and rotors is realized, a multi-air-gap structure is formed, and the power torque density of the motor is improved; and meanwhile, the modular design has higher fault tolerance, the research and development period of a new product can be greatly shortened, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to an axial flux motor and a vehicle. Background Art

[0002] The axial flux motor, also known as the disc motor, is a motor in which the magnetic lines of force are distributed along the axial direction. Due to its small axial size, high efficiency, and high power density, it is perfectly suitable for new energy vehicle generators and hub motors, and is increasingly attracting the attention of automobile companies.

[0003] Disc motors are typically permanent magnet synchronous motors (PMSMs) with permanent magnets fixed to the rotor. Initially, disc motors consisted of a single stator and rotor. This topology creates significant unilateral axial magnetic pull, which results in excessive bearing loads and a significantly reduced lifespan. To address axial force imbalance, the current mainstream topologies in the automotive market are single-stator dual-rotor and single-rotor dual-stator configurations. While the current structure already provides disc motors with higher power density than radial motors of the same size, there is still room for improvement to further enhance their competitive advantage. Utility Model Content

[0004] The purpose of the utility model is to provide an axial flux motor and a vehicle, so as to further improve the power density of the disc motor.

[0005] In a first aspect, the present invention provides an axial flux motor, comprising:

[0006] a housing, wherein a motor core shaft is provided in the housing;

[0007] The stator-rotor module is arranged in the shell, and the stator-rotor module includes a stator module and a rotor module. The stator module is connected to the rotor module, and the rotor module is transmission-connected to the motor core shaft. There are several stator-rotor modules, and the several stator-rotor modules are connected in series in sequence along the axial direction of the motor core shaft.

[0008] An axial flux motor as described above, wherein preferably, the stator module includes an input-end stator assembly and an output-end stator assembly, the input-end stator assembly and the output-end stator assembly are respectively arranged on both sides of the rotor module, and the input-end stator assembly and the output-end stator assembly are both fixedly connected to the housing.

[0009] In the axial flux motor as described above, preferably, the sum of the number of the input-end stator assemblies and the output-end stator assemblies is twice the number of the rotor modules.

[0010] In the axial flux motor as described above, preferably, the rotor module includes a rotor disk, and the rotor disk is drivingly connected to the motor core shaft.

[0011] In the axial flux motor as described above, preferably, the input-end stator assembly and the output-end stator assembly are respectively arranged on opposite sides of the rotor disk, and the output-end stator assembly of one stator module is connected to the input-end stator assembly of an adjacent stator module.

[0012] In the axial flux motor as described above, preferably, a three-phase terminal block is provided on the housing, and the three-phase terminal block includes three-phase outlet terminals.

[0013] In the axial flux motor as described above, preferably, the input-end stator assembly includes an input-end winding, and the input-end winding is connected to the three-phase output terminal.

[0014] In the axial flux motor as described above, preferably, the output-end stator assembly includes an output-end winding, and the output-end winding is connected to the three-phase output terminal.

[0015] In the axial flux motor as described above, preferably, a resolver stator and rotor assembly is provided in the housing, and the resolver stator and rotor assembly is drivingly connected to the motor core shaft.

[0016] In a second aspect, the present invention provides a vehicle comprising the aforementioned axial flux motor.

[0017] Compared with the existing technology, the utility model realizes serial connection between multiple stators and rotors by arranging a number of stator and rotor modules in series along the axial direction of the motor core shaft in the housing, forming a multi-air-gap structure, thereby improving the power torque density of the motor; at the same time, the modular design has higher fault tolerance, which can significantly shorten the new product development cycle and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional diagram of an axial flux motor having a stator module provided by an embodiment of the present invention;

[0019] Figure 2 is a cross-sectional view of an axial flux motor having a stator module provided by an embodiment of the present utility model;

[0020] Figure 3 is a three-dimensional diagram of an axial flux motor with two stator modules provided by an embodiment of the present invention;

[0021] Figure 4 It is a cross-sectional view of an axial flux motor with two stator modules provided by an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 10-housing, 11-motor core shaft, 12-three-phase terminal block, 121-three-phase output terminal;

[0024] 20- stator-rotor module, 21- stator module, 211- input end stator assembly, 212- output end stator assembly, 213- input end winding, 214- output end winding, 22- rotor module, 221- rotor disk;

[0025] 30-Resolver stator and rotor assembly. DETAILED DESCRIPTION

[0026] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In a first aspect, the present invention provides an axial flux motor, comprising a housing 10 and a stator and rotor module 20, wherein:

[0028] A motor core shaft 11 is provided in the housing 10 . The motor core shaft 11 is a rotating shaft in the axial flux motor. The energy generated by the axial flux motor can be transmitted to other devices via the motor core shaft 11 .

[0029] The stator and rotor module 20 is arranged in the shell 10, and the stator and rotor module 20 includes a stator module 21 and a rotor module 22. The stator module 21 is connected to the rotor module 22, so as to work together to generate electrical energy. In the embodiment provided in the present application, in order to improve the power torque density of the axial flux motor, a plurality of stator modules 21 are arranged in the shell 10, and the number of rotor modules 22 is adapted to the number of stator modules 21. After each rotor module 22 is connected to a stator module 21 to form a stator and rotor module 20, the plurality of stator and rotor modules 20 are connected in series in sequence along the axial direction of the motor core shaft 11, and a multi-air gap structure is formed between adjacent stator and rotor modules 20, which is beneficial to improving the power torque density of the axial flux motor.

[0030] The rotor module 22 is in transmission connection with the motor core shaft 11. Under the joint action of the rotor module 22 and the stator module 21, the motor core shaft 11 rotates to convert the electrical energy generated between the stator module 21 and the rotor module 22 based on the principle of electromagnetic induction into mechanical energy and transmit it out.

[0031] A stator module 21 is connected to a rotor module 22 to form an independent stator-rotor module 20. When multiple stator-rotor modules 20 are installed within the housing 10, the stators and rotors within each independent stator-rotor module 20 are easily staggered at an appropriate angle along the motor shaft 11, thereby reducing cogging torque and torque ripple, and improving NVH performance. Furthermore, the controller can adjust the number of stator-rotor modules 20 required based on different load conditions to improve overall operating efficiency.

[0032] After connecting the stator module 21 and the rotor module 22 to form a modular structure, the axial flux motor has higher fault tolerance, which can significantly shorten the new product development cycle and reduce costs; the number of stator modules 21 and rotor modules 22 can be designed in combination according to product requirements to meet diverse product performance requirements, which is not limited here.

[0033] In a feasible embodiment, the stator module 21 includes an input-end stator assembly 211 and an output-end stator assembly 212. The input-end stator assembly 211 and the output-end stator assembly 212 are respectively arranged on both sides of the rotor module 22, so that a stator-rotor module 20 has a double stator and single rotor structure, which can avoid the occurrence of axial force imbalance and effectively avoid the problem of a sharp reduction in bearing life due to heavy bearing load.

[0034] Furthermore, the input-end stator assembly 211 and the output-end stator assembly 212 are both fixed in the housing 10 to ensure the stability of the stator module 21 in the housing 10 .

[0035] In the embodiment provided in the present application, the rotor module 22 includes a rotor disk 221, which is transmission-connected to the motor core shaft 11, and the input-end stator assembly 211 and the output-end stator assembly 212 are respectively arranged on opposite sides of the rotor disk 221. When multiple stator-rotor modules 20 are arranged in the shell 10, between the stator-rotor modules 20 connected in series in sequence, the output-end stator assembly 212 of the previous stator module 21 is connected to the input-end stator assembly 211 of the adjacent stator module 21.

[0036] Preferably, the input-end stator assembly 211 of the stator module 21 closest to one side of the shell 10 is fixedly connected to the shell 10 by bolts, the output-end stator assembly 212 of the stator module 21 closest to the other side of the shell 10 is fixedly connected to the shell 10 by bolts, and the output-end stator assembly 212 between adjacent stator modules 21 is connected to the next input-end stator assembly 211 by bolts, thereby achieving the fixation of multiple stator modules 21 in the shell 10.

[0037] In the embodiment provided in the present application, a three-phase terminal block 12 is further provided on the housing 10. The three-phase terminal block 12 includes a three-phase output terminal 121. The input-end stator assembly 211 and the output-end stator assembly 212 respectively include an input-end winding 213 and an output-end winding 214. The input-end winding 213 and the output-end winding 214 are both connected to the three-phase output terminal 121, so that the input-end winding 213 and the output-end winding 214 are brought together at the three-phase terminal block 12 to form a set of output wires. When multiple stator modules 21 are provided in the housing 10, the input-end windings 213 and the output-end windings 214 of all stator modules 21 are brought together at the three-phase terminal block 12. After being connected to the three-phase output terminal 121, each stator module 21 can form an independent set of output wires, making the internal wiring of the axial flux motor clear, thereby simplifying the structure of the axial flux motor.

[0038] The axial flux motor of the present application further includes a rotary stator and rotor assembly 30, which is transmission-connected to the motor core shaft 11. Figure 2 as well as Figure 4 As shown, when multiple stator-rotor modules 20 are connected to the motor core shaft 11, the resolver stator-rotor assembly 30 is transmission-connected to the end of the motor core shaft 11. When the motor core shaft 11 rotates, the resolver stator-rotor assembly 30 rotates synchronously with the rotation of the motor core shaft 11. During the rotation process, the position information of the rotor in the rotor module 22 can be reflected, and the staggered angle between the stator in the stator module 21 and the rotor in the corresponding rotor module 22 can be controlled to meet the requirements of reducing the cogging torque and torque fluctuation.

[0039] Reference Figure 1 as well as Figure 2 As described above, a stator and rotor module 20 is set in the housing 10. The input end stator assembly 211 and the output end stator assembly 212 of the stator module 21 are fixedly connected to the housing 10 respectively. The rotor module 22 is connected between the input end stator assembly 211 and the output end stator assembly 212. The axial flux motor has a one rotor and two stator structure. When it is necessary to add a stator module 21, refer to Figure 3 as well as Figure 4As shown, a rotor module 22 needs to be added simultaneously, and the motor core shaft 11 needs to be replaced at the same time. The input stator assembly 211 of the stator module 21 located on one side of the housing 10 and the output stator assembly 212 of the stator module 21 located on the other side of the housing 10 are both fixedly connected to the housing 10. The output stator assembly 212 of a stator module 21 located in the middle of the housing 10 is fixedly connected to the input stator assembly 211 of the adjacent stator module 21, thereby forming an axial flux motor with a two-rotor four-stator structure. As the number of stator modules 21 increases, the number of rotor modules 22 increases accordingly, and the motor core shaft 11 needs to be replaced accordingly. For an axial flux motor with multiple stator and rotor modules 20, the sum of the number of input stator assemblies 211 and output stator assemblies 212 in the stator module 21 should be twice the number of rotor modules 22.

[0040] In a second aspect, the present invention provides a vehicle comprising the aforementioned axial flux motor. The axial flux motor has a modular structure with multiple stators and rotors in series that can be flexibly designed, thereby improving vehicle performance while ensuring high operating efficiency under global operating conditions.

[0041] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the scope of implementation of the present invention is not limited to what is shown in the drawings. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which do not exceed the spirit covered by the description and drawings, should be within the scope of protection of the present invention.

Claims

1. An axial flux motor, characterized in that: include: a housing, wherein a motor core shaft is provided in the housing; The stator-rotor module is arranged in the shell, and the stator-rotor module includes a stator module and a rotor module. The stator module is connected to the rotor module, and the rotor module is transmission-connected to the motor core shaft. There are several stator-rotor modules, and the several stator-rotor modules are connected in series in sequence along the axial direction of the motor core shaft.

2. The axial flux motor according to claim 1, characterized in that The stator module includes an input-end stator assembly and an output-end stator assembly. The input-end stator assembly and the output-end stator assembly are respectively arranged on both sides of the rotor module. The input-end stator assembly and the output-end stator assembly are both fixedly connected to the housing.

3. The axial flux motor according to claim 2, characterized in that The total number of the input-end stator assemblies and the output-end stator assemblies is twice the number of the rotor modules.

4. The axial flux motor according to claim 3, characterized in that The rotor module includes a rotor disk, which is drivingly connected to the motor core shaft.

5. The axial flux motor according to claim 4, characterized in that The input-end stator assembly and the output-end stator assembly are respectively arranged on opposite sides of the rotor disk, and the output-end stator assembly of one stator module is connected to the input-end stator assembly of an adjacent stator module.

6. The axial flux motor according to claim 2, characterized in that A three-phase terminal block is provided on the housing, and the three-phase terminal block includes three-phase outlet terminals.

7. The axial flux motor according to claim 6, characterized in that The input-end stator assembly includes an input-end winding, and the input-end winding is connected to the three-phase output terminal.

8. The axial flux motor according to claim 6, characterized in that The output end stator assembly includes an output end winding, and the output end winding is connected to the three-phase output terminal.

9. The axial flux motor according to claim 1, characterized in that A rotary stator and rotor assembly is provided in the housing, and the rotary stator and rotor assembly is transmission-connected to the motor core shaft.

10. A vehicle, characterized in that: An axial flux motor comprising the one described in any one of claims 1 to 9.

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