Rotor of axial magnetic flux motor, axial magnetic flux motor and vehicle

Abstract

The utility model relates to a rotor of an axial magnetic flux motor, the axial magnetic flux motor and a vehicle, the rotor of the axial magnetic flux motor comprises an iron core, the iron core comprises a main body configured to be in an annular plate shape and a plurality of raised lines located on one side plate surface of the main body and extending from an inner ring to an outer ring, and the plurality of raised lines are arranged along the circumferential direction of the main body at intervals; a mounting groove is formed between every two adjacent raised lines; and the plurality of magnetic steel assemblies are respectively constructed into fan-shaped skewed pole structures and are arranged in the corresponding mounting grooves. And the mounting groove is designed, so that the magnetic steel assembly is more convenient to mount and more accurate to position. And the raised lines can form circumferential support for the magnetic steel assembly, so that the magnetic steel assembly is prevented from falling off in the high-speed movement process of the rotor, and the stability is better. The magnetic steel assemblies are arranged to be of a fan-shaped skewed pole structure, so that a plurality of magnetic steel assemblies can mutually counteract one or more harmonic waves of the composite torque, the space-time order and the force density of the electromagnetic force are improved, main harmonic waves are optimized, torque fluctuation is improved, and electromagnetic vibration and noise are reduced.

Description

Technical Field

[0001] This disclosure relates to the field of axial flux motor technology, and more specifically, to a rotor of an axial flux motor, an axial flux motor, and a vehicle. Background Technology

[0002] Axial flux motors, also known as "disc motors," are motors where the magnetic field is along the axial direction. Axial flux motors typically consist of a stator assembly and a rotor assembly. The rotor assembly includes a rotor core and a magnet structure mounted on the rotor core. In related technologies, the magnet structure is usually constructed as a standard sector-shaped structure and directly surface-mounted to the rotor core facing the stator assembly. However, surface-mounted magnet structures suffer from lower installation and positioning accuracy and the lack of circumferential support poses a risk of detachment. Furthermore, the standard sector-shaped magnet structure leads to significant torque pulsation and vibration noise during motor operation. Utility Model Content

[0003] The purpose of this disclosure is to provide a rotor for an axial flux motor, an axial flux motor, and a vehicle to at least partially solve the problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a rotor for an axial flux motor, comprising:

[0005] The iron core includes a main body constructed in the shape of an annular plate and a plurality of protrusions located on one side of the main body and extending from an inner ring to an outer ring. The plurality of protrusions are arranged circumferentially spaced along the main body, and mounting grooves are formed between adjacent protrusions; and

[0006] Multiple magnet components are each constructed as a fan-shaped oblique pole structure and are set in corresponding mounting slots.

[0007] Optionally, the surface of the protrusion away from the main body is flush with the surface of the plurality of magnet assemblies away from the main body.

[0008] Optionally, the plurality of magnet components are respectively bonded to the corresponding mounting grooves in a shape-matched manner.

[0009] Optionally, the core comprises silicon steel sheets wound layer by layer from the inner ring to the outer ring.

[0010] Optionally, the magnet assembly is constructed as a fan-shaped double-sided oblique pole structure.

[0011] Optionally, the magnet assembly includes a first arc segment and a second arc segment arranged concentrically, and a first broken line segment and a second broken line segment respectively connected between the corresponding ends of the first arc segment and the second arc segment.

[0012] Optionally, the magnet assembly includes a plurality of sub-magnets stacked radially in sequence, and the inclined sides of the plurality of sub-magnets on the same side together form the first or second broken line segment.

[0013] Optionally, a magnetic shielding layer is provided between adjacent pairs of the plurality of sub-magnets.

[0014] According to a second aspect of this disclosure, an axial flux motor is provided, including the rotor of the axial flux motor described above.

[0015] According to a third aspect of this disclosure, a vehicle is provided, including the aforementioned axial flux motor.

[0016] Through the above technical solution, the designed protrusions can form multiple mounting slots on the surface of the main body for installing magnet components, making the installation of magnet components more convenient and the positioning more precise. Furthermore, the protrusions located circumferentially on the magnet components provide circumferential support, preventing the magnet components from falling off during high-speed rotor movement and improving stability. Moreover, the mounting slots formed by two protrusions are simpler to manufacture than the traditional method of creating recesses on the surface of the main body. The outer contours of the protrusions are all straight lines, without involving fan-shaped arc segments, resulting in lower production costs. Furthermore, given the limited surface area of ​​the iron core, more of the plate can be used to arrange the magnet components. In addition, by setting the magnet components as a fan-shaped oblique pole structure, multiple magnet components can cancel out one or more harmonics of the combined torque, improving the spatiotemporal order and force density of the electromagnetic force, optimizing the main harmonics, improving torque fluctuations, and reducing electromagnetic vibration and noise.

[0017] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of a rotor structure exemplarily shown according to the present disclosure, wherein a magnet assembly is omitted;

[0020] Figure 2 yes Figure 1 The diagram shows the structure of the rotor's iron core;

[0021] Figure 3 yes Figure 1 The diagram shows the structure of the magnet assembly.

[0022] Explanation of reference numerals in the attached figures

[0023] 1-Iron core; 11-Main body; 12-Protruding strip; 13-Mounting groove; 2-Magnetic steel assembly; 21-First arc segment; 22-Second arc segment; 23-First broken line segment; 24-Second broken line segment; 201-Sub-magnet. Detailed Implementation

[0024] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0025] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" may be based on the structure of the relevant components themselves or on the orientation of the relevant components when they are used together. For example, multiple protrusions located on one side of the main body and extending from the "inner ring" to the "outer ring". Here, "inner" and "outer" are based on the radial direction of the iron core. "Inner" refers to the direction closer to the center of the iron core, and "outer" refers to the direction away from the center of the iron core.

[0026] In this disclosure, the terms "first," "second," etc., are used to distinguish one element from another and do not indicate any order or importance. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0027] Reference Figures 1-3 This disclosure exemplarily illustrates a rotor for an axial flux motor, including a core 1 and a plurality of magnet assemblies 2. The core 1 includes a main body 11 configured as an annular plate and a plurality of protrusions 12 located on one side of the main body 11 and extending from the inner ring to the outer ring. The plurality of protrusions 12 are arranged at intervals along the circumference of the main body 11, and a mounting groove 13 is formed between two adjacent protrusions 12. The plurality of magnet assemblies 2 are respectively configured as fan-shaped oblique pole structures and disposed in corresponding mounting grooves 13. Here, the magnet assemblies 2 can be fixed in the mounting grooves 13 by interference fit, or they can also be fixed by the adhesive method mentioned below, which is not limited in this disclosure.

[0028] In the embodiments of this disclosure, the protrusion 12 can be integrally formed with the main body 11. Alternatively, in some other embodiments, the protrusion 12 can also be integrally formed with the main body 11 by welding or other means. Or, the mounting groove 13 penetrating the main body 11 can be directly milled radially on the plate surface of the main body 11 using a lathe or other tools, and the portion between two adjacent mounting grooves 13 forms the protrusion 12.

[0029] It should be explained that the "fan-shaped oblique pole structure" here refers to the overall structure of the magnet assembly 2 being fan-shaped, with the two arc segments of the fan concentric with the main body 11, and the extension line of at least one of the two oblique sides connecting the two arc segments of the fan being offset from the center of the main body 11, i.e., not passing through the center of the main body 11. Since the oblique pole structure of the fan-shaped magnet is well known to those skilled in the art, it will not be explained in detail here. In this disclosure, the direction and size of the oblique pole angles corresponding to each oblique side are not limited. This disclosure aims to provide a novel shape of magnet assembly 2 to expand the selection and beneficial effects of magnet assembly 2. The size and direction of the oblique pole angles can be simulated using simulation software to ultimately obtain preferred embodiments.

[0030] By using the above technical solution, the protrusions 12 can form multiple mounting grooves 13 on the surface of the main body 11 for mounting the magnet assembly 2, making the installation of the magnet assembly 2 more convenient and the positioning more accurate. Furthermore, the protrusions 12 located circumferentially on the magnet assembly 2 can provide circumferential support, preventing the magnet assembly 2 from falling off during high-speed rotor movement, thus improving stability. Moreover, the mounting grooves 13 formed by two protrusions 12 are simpler to form than the traditional method of forming recesses on the surface of the main body 11. The outer contours of the protrusions 12 are all straight lines, without involving fan-shaped arc segments, resulting in lower production costs. Furthermore, given the limited surface area of ​​the iron core 1, more of the plate surface can be used to arrange the magnet assembly 2. In addition, by setting the magnet assembly 2 as a fan-shaped oblique pole structure, multiple magnet assemblies 2 can cancel out one or more harmonics of the combined torque, improving the spatiotemporal order and force density of the electromagnetic force, optimizing the main harmonics, improving torque fluctuations, and reducing electromagnetic vibration and noise.

[0031] In the embodiments of this disclosure, the surface of the protrusion 12 away from the main body 11 can be flush with the surface of the plurality of magnet assemblies 2 away from the main body 11, respectively. That is, the thickness of the magnet assembly 2 is equal to the thickness of the protrusion 12, thereby ensuring that the surface of the magnet assembly 2 is flush with the top surface of the protrusion 12, thus forming an air gap that is approximately a uniform ring between the stator of the motor and the magnet assembly 2, effectively reducing wind friction loss.

[0032] In the embodiments of this disclosure, multiple magnet assemblies 2 can be respectively bonded to corresponding mounting slots 13 in a shape-matching manner. This bonding method reduces the risk of the magnet assemblies 2 detaching from the mounting slots 13 during high-speed rotor operation. Here, "shape matching" refers to the fact that the structure of the two inclined sides of the magnet assembly 2 opposite to the convex strip 12 matches the structure of the convex strip 12, and the two arc-shaped segments of the magnet assembly 2 can match the structure of the inner and outer rings of the main body 11. This allows the magnet assembly 2 to "fill" the mounting slot 13, improving the stability and accuracy of the installation.

[0033] This disclosure does not limit the manufacturing method of the core 1. For example, in the embodiments of this disclosure, the core 1 may include silicon steel sheets wound layer by layer from the inner ring to the outer ring. Specifically, the core 1 can be formed by a silicon steel winding process, that is, a long strip of silicon steel is wound layer by layer from the inner layer to the outer layer according to the desired shape of the core 1. This process can produce more complex structures and has lower iron loss, thus improving efficiency. In addition, in some other embodiments, the core 1 can also be formed by stamping.

[0034] In the embodiments of this disclosure, the magnet assembly 2 can be constructed as a fan-shaped double-sided slanted pole structure. Here, "double-sided slanted pole structure" refers to the extension lines of the two slanted sides of the magnet assembly 2 connecting the two arc segments being offset from the center of the main body 11. This disclosure does not limit the size and direction of the slanted pole angles corresponding to the two slanted sides of the magnet assembly 2; they can be the same or different. With this design, the double-sided slanted pole can further improve torque ripple and reduce electromagnetic vibration and noise. Since the structure and effects of the double-sided slanted pole are well known to those skilled in the art, they will not be described in detail here.

[0035] It should be noted that in this disclosure, the size and direction of the slant angles of the two slant sides of the sector-shaped slant pole structure are not limited. The beneficial effects of each slant angle can be simulated and a more preferred embodiment can be selected. Those skilled in the art are familiar with the operation method and principle of this simulation experiment, and it will not be described in detail here.

[0036] Reference Figure 3 In embodiments of this disclosure, the magnet assembly 2 may include a first arc segment 21 and a second arc segment 22 arranged concentrically, and a first broken line segment 23 (hypotenuse) and a second broken line segment 24 (hypotenuse) respectively connected between the corresponding ends of the first arc segment 21 and the second arc segment 22. The two broken line segments may be respectively composed of… Figure 3 The magnet assembly 2 can be composed of two straight lines, or it can be composed of three or four straight lines, depending on the specific design requirements. By setting the two inclined sides of the magnet assembly 2 as broken line segments, the shape of the magnet assembly 2 can be further expanded. In simulation experiments, more options can be simulated to obtain a more preferred embodiment than one where the inclined sides are straight lines. This allows multiple magnet assemblies 2 to cancel out one or more harmonics of the combined torque, optimize the main harmonics, improve torque fluctuations, and reduce electromagnetic vibration and noise. On the other hand, when the inclined sides of the magnet assembly 2 are set as broken line segments, the protrusion 12 can also be constructed as the same broken line segment. This allows the magnet assembly 2 to form a radial limit by its own structure when installed in the mounting groove 13, avoiding the risk of radial detachment of the magnet assembly 2 when the rotor rotates at high speed.

[0037] In the embodiments provided in this disclosure, the extensions of the plurality of straight lines in each broken line segment may all be offset from the center of the body 11. Furthermore, in some other embodiments, the extensions of a portion of the plurality of straight lines in each broken line segment may pass through the center of the body 11, while the extensions of the remaining portions may be offset from the center of the body 11.

[0038] Reference Figure 1 and Figure 3 In embodiments of this disclosure, the magnet assembly 2 may include a plurality of sub-magnets 201 stacked radially in sequence. The inclined edges of the plurality of sub-magnets 201 located on the same side may jointly form a first broken line segment 23 or a second broken line segment 24. By designing the magnet assembly 2 as being composed of a plurality of sub-magnets 201 stacked in sequence, the plurality of magnet assemblies 2 can further cancel out one or more harmonics of the synthesized torque, optimize the main harmonics, improve torque ripple, and reduce electromagnetic vibration and noise.

[0039] This disclosure does not limit the number of submagnets 201, for example in Figure 3 In the illustrated embodiment, there are two sub-magnets 201, and the adjacent arc segments of the two sub-magnets 201 are of equal length and fit together. Furthermore, in some other embodiments, the number of sub-magnets 201 may be three, four, five, etc. When there are multiple sub-magnets 201, the two interconnected hypotenuses on the same side of two adjacent sub-magnets 201 may be parallel to each other or may be at an angle to each other.

[0040] It should be noted that before the multiple sub-magnets 201 are installed into the mounting slot 13, they can be bonded together to form a whole, thereby reducing the installation difficulty and the overall stability of the magnet assembly 2.

[0041] Furthermore, in embodiments of this disclosure, a magnetic shielding layer (not shown in the figure) may be provided between adjacent sub-magnets 201. The magnetic shielding layer, also called an insulating layer, is commonly made of resin. By providing the magnetic shielding layer, eddy current losses between the individual sub-magnets 201 of the magnet assembly 2 can be reduced.

[0042] According to a second aspect of this disclosure, an axial flux motor is provided, including the rotor of the axial flux motor described above. Since the axial flux motor has all the beneficial effects of the rotor of the axial flux motor described above, it will not be repeated here.

[0043] According to a third aspect of this disclosure, a vehicle is provided that includes the aforementioned axial flux motor, which, since the axial flux motor has all the beneficial effects of the aforementioned vehicle, will not be described in detail here.

[0044] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0045] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0046] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A rotor for an axial flux motor, characterized in that, include: The iron core includes a main body constructed in the shape of an annular plate and a plurality of protrusions located on one side of the main body and extending from an inner ring to an outer ring. The plurality of protrusions are arranged circumferentially spaced along the main body, and mounting grooves are formed between adjacent protrusions; and Multiple magnet components are each constructed as a fan-shaped oblique pole structure and are set in corresponding mounting slots.

2. The rotor of the axial flux motor according to claim 1, characterized in that, The surface of the protrusion away from the main body is flush with the surface of the plurality of magnet assemblies away from the main body.

3. The rotor of the axial flux motor according to claim 1, characterized in that, The plurality of magnet components are respectively bonded to the corresponding mounting slots in a shape-matched manner.

4. The rotor of the axial flux motor according to claim 1, characterized in that, The core comprises silicon steel sheets wound layer by layer from the inner ring to the outer ring.

5. The rotor of the axial flux motor according to any one of claims 1-4, characterized in that, The magnet assembly is constructed as a fan-shaped double-sided oblique pole structure.

6. The rotor of the axial flux motor according to claim 5, characterized in that, The magnet assembly includes a first arc segment and a second arc segment arranged concentrically, as well as a first broken line segment and a second broken line segment respectively connected between the corresponding ends of the first arc segment and the second arc segment.

7. The rotor of the axial flux motor according to claim 6, characterized in that, The magnet assembly includes multiple sub-magnets stacked radially, and the inclined sides of the multiple sub-magnets on the same side together form the first or second broken line segment.

8. The rotor of the axial flux motor according to claim 7, characterized in that, A magnetic shielding layer is provided between adjacent pairs of the plurality of sub-magnets.

9. An axial flux motor, characterized in that, The rotor of the axial flux motor included in any one of claims 1-8.

10. A vehicle, characterized in that, Including the axial flux motor as described in claim 9.

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