Magnet assembly, rotor assembly, motor and vehicle

Abstract

The utility model discloses a magnet assembly, a rotor assembly, a motor and a vehicle, the magnet assembly comprises a plurality of magnet single bodies, the plurality of magnet single bodies are laminated in a magnetization direction, magnet grooves are formed in the magnet single bodies, the magnet grooves in the adjacent magnet single bodies are staggered in a first direction, and the magnet grooves in the magnet single bodies are staggered in a second direction. The first direction is perpendicular to the magnetization direction. According to the magnet assembly provided by the utility model, the magnet grooves are arranged on the magnet monomers, an eddy current loop can be disconnected at the magnet grooves, eddy current generation is reduced, eddy current loss in the working process of a motor is reduced, and the efficiency of the motor is improved; and the sizes and materials of the magnet monomers at different positions in the magnetization direction can be matched according to product design requirements, so that the design difficulty and the production cost of the motor can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially is related to a magnet assembly, a rotor assembly, a motor and a vehicle. BACKGROUND

[0002] The magnet is an important component in the motor, and the magnetic field in the motor changes in the process of motor operation, so that an induced electromotive force is generated in the magnet, and under the action of the induced electromotive force, eddy current is generated in the magnet, the magnet is heated, and eddy current loss is caused. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the prior art is solved, and for this purpose, the utility model provides a magnet assembly, which can reduce the eddy current loss of the motor.

[0004] The utility model further provides a rotor assembly with the magnet assembly.

[0005] The utility model further provides a motor with the rotor assembly.

[0006] The utility model further provides a vehicle with the motor.

[0007] According to the magnet assembly of the utility model first aspect, including: a plurality of magnet monomers, a plurality of magnet monomers are arranged in the magnetization direction and are stacked, the magnet monomer is formed with the magnet slot, the magnet slot on the adjacent magnet monomer is arranged in the first direction and is staggered, and the first direction is perpendicular to the magnetization direction.

[0008] According to the magnet assembly of the utility model first aspect, the magnet slot is arranged on the magnet monomer, the loop of eddy current can be disconnected at the magnet slot, the generation of eddy current is reduced, the eddy current loss in the process of motor operation is reduced, the efficiency of the motor is improved, a plurality of magnet monomers are arranged in the magnetization direction, the size and material of the magnet monomer at different positions in the magnetization direction can be matched according to the product design requirement in the process of product design, so that the design difficulty and production cost of the motor can be reduced, and the magnet slot on the adjacent magnet monomer is arranged in the first direction and is staggered, so that the structural strength of the magnet assembly can be improved.

[0009] According to some embodiments of the utility model, the magnet slot penetrates at least one end of the magnet monomer in the extension direction of the magnet slot.

[0010] According to some embodiments of the present application, the magnet monomer is provided with the magnet slot at at least one end in the second direction, the magnet slot extends along the magnetization direction and penetrates the magnet monomer in the magnetization direction, and the magnet slot is formed in the first direction, the second direction and the magnetization direction.

[0011] According to some embodiments of the present application, the magnet monomer is provided with the magnet slot at both ends in the second direction, and the magnet slots at both ends of the magnet monomer in the second direction are arranged staggered in the first direction.

[0012] According to some embodiments of the present application, the magnet monomer is provided with the magnet slot at both ends in the second direction, and the magnet slots at both ends of the magnet monomer in the second direction are arranged opposite in the second direction.

[0013] According to some embodiments of the present application, the magnet monomer is provided with the magnet slot at one end in the second direction, and the magnet slots on the adjacent magnet monomers are respectively arranged at two ends of the magnet monomers which are away from each other in the second direction.

[0014] According to some embodiments of the present application, the width of the magnet slot is 0.01mm-1mm.

[0015] According to some embodiments of the present application, the adjacent magnet monomers are connected by bonding.

[0016] According to some embodiments of the present application, the thickness of the bonding layer between the adjacent magnet monomers is 0.01mm-0.5mm.

[0017] According to some embodiments of the present application, the plurality of magnet monomers comprises at least one first monomer and at least one second monomer, and in the magnetization direction, the size of the first monomer is larger than that of the second monomer.

[0018] The rotor assembly according to the second aspect of the present application comprises: a rotor core, wherein an installation slot is formed in the rotor core; and the magnet assembly according to the first aspect of the present application, wherein the magnet assembly is arranged in the installation slot.

[0019] The rotor assembly according to the second aspect of the present application, by arranging the magnet assembly according to the first aspect of the present application, can improve the efficiency during the operation of the motor.

[0020] The motor according to the third aspect of the present application comprises: the rotor assembly according to the second aspect of the present application; and a stator assembly, wherein the stator assembly is arranged on the radially inner side or the radially outer side of the rotor assembly.

[0021] According to the motor of the third aspect of the present application, by setting the rotor assembly according to the second aspect of the present application, the efficiency of the motor can be improved, and the design difficulty and production cost of the motor are reduced.

[0022] According to the vehicle of the fourth aspect of the present application, the motor according to the third aspect of the present application is arranged.

[0023] According to the vehicle of the fourth aspect of the present application, by setting the motor according to the third aspect of the present application, the efficiency during the working process of the vehicle can be improved.

[0024] Additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a schematic view of a magnet assembly according to an embodiment of the present application;

[0026] Figure 2 is a schematic view of the magnet assembly shown in Figure 1 from another angle;

[0027] Figure 3 is a schematic view of a magnet assembly according to another embodiment of the present application;

[0028] Figure 4 is a schematic view of the magnet assembly shown in Figure 3 from another angle;

[0029] Figure 5 is a schematic view of a magnet assembly according to another embodiment of the present application;

[0030] Figure 6 is a schematic view of the magnet assembly shown in Figure 5 from another angle;

[0031] Figure 7 is a schematic view of a bonding layer according to an embodiment of the present application;

[0032] Figure 8 is a schematic view of a bonding layer according to another embodiment of the present application;

[0033] Figure 9 is a schematic view of a bonding layer according to another embodiment of the present application;

[0034] Figure 10 is a schematic view of a comparative example one of the present application;

[0035] Figure 11 is a schematic view of a comparative example two of the present application;

[0036] Figure 12 is a schematic view of comparative example three of the present application;

[0037] Figure 13 is a schematic view of a rotor assembly of an embodiment of the present application.

[0038] Reference signs:

[0039] 1000, rotor assembly;

[0040] 100, magnet assembly;

[0041] 10, magnet monomer; 11, magnet slot;

[0042] 20, adhesive layer;

[0043] 30, magnet segment;

[0044] 200, rotor core; 210, mounting groove. DETAILED DESCRIPTION

[0045] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0046] Reference is made below Figures 1-13 to describe the magnet assembly 100 according to the first aspect embodiment of the present application.

[0047] As shown in Figures 1-6 , the magnet assembly 100 according to the first aspect embodiment of the present application comprises: a plurality of magnet monomers 10, for example, the magnet monomers 10 can be two, three or four, the plurality of magnet monomers 10 are arranged in a stacking manner in a magnetization direction, the magnet monomers 10 are formed with magnet slots 11, the magnet slots 11 on adjacent magnet monomers 10 are arranged in a staggered manner in a first direction, and the first direction is perpendicular to the magnetization direction.

[0048] In the process of motor operation, under the action of electromagnetic induction, an electromotive force will be generated in the magnet monomer 10, so that eddy current is generated in the magnet monomer 10. It can be understood that by providing the magnet slots 11 on the magnet monomers 10, a break will be generated at the magnet slots 11. In this way, the magnet slots 11 can prevent the generation of part of the eddy current, thereby reducing the eddy current loss.

[0049] The motor has different requirements for the magnetic field at different positions of the motor, and the various action parameters of the magnet monomer 10 during the operation of the motor are also different at different positions of the motor, for example, the magnetic field force received by the magnetic field monomer is different at different positions of the motor, and the temperature of the magnetic field monomer is also different, so during the design of the motor, the magnet assembly 100 can be designed differently according to the needs of different positions of the motor.

[0050] In the embodiment, the plurality of magnet monomers 10 are arranged in a stacked manner in the magnetization direction to form the magnet assembly 100, and during the product design, the material or size of some magnet monomers 10 in the magnet assembly 100 can be adjusted according to the working needs of each position and the consideration of production cost, so that the magnet assembly 100 is more easily to meet the needs of product design.

[0051] By arranging the magnet grooves 11 on the adjacent magnet monomers 10 in the first direction, the distribution of the magnet grooves 11 in the magnet assembly 100 is more uniform, which can increase the uniformity of the magnetic field of the magnet assembly 100 on the one hand, and the structural damage in the magnet assembly 100 is more dispersed, which can increase the structural strength of the magnet assembly 100.

[0052] According to the magnet assembly 100 of the first aspect of the present application, by arranging the magnet grooves 11 on the magnet monomers 10, the loop of eddy current can be broken at the magnet grooves 11, reducing the generation of eddy current, thereby reducing the eddy current loss during the operation of the motor and improving the efficiency of the motor. By arranging a plurality of magnet monomers 10 in the magnetization direction, the size and material of the magnet monomers 10 at different positions in the magnetization direction can be matched according to the needs of product design during the product design, thereby reducing the design difficulty and production cost of the motor, and the magnet grooves 11 on the adjacent magnet monomers 10 are arranged in the first direction, which can increase the structural strength of the magnet assembly 100.

[0053] In some embodiments of the present application, as shown in Figures 1-6 That is, the magnet groove 11 can penetrate one end of the magnet monomer 10 in the extension direction of the magnet groove 11, or the magnet groove 11 can penetrate both ends of the magnet monomer 10 in the extension direction of the magnet groove 11. Therefore, during production, it is easier to form the magnet groove 11 on the magnet monomer 10, which can reduce the production difficulty.

[0054] In some embodiments of the present application, as shown in Figures 1-6As shown in the drawings, the magnet monomer 10 is formed with a magnet slot 11 at at least one end in the second direction, the magnet slot 11 extends along the magnetization direction and penetrates the magnet monomer 10 in the magnetization direction, and the magnet slot 11 is formed at the first direction, the second direction and the magnetization direction.

[0055] That is, the magnet monomer 10 can be formed with a magnet slot 11 at one end in the second direction, or the magnet monomer 10 can be formed with a magnet slot 11 at both ends in the second direction.

[0056] Therefore, the production difficulty can be further reduced, the magnet slot 11 is opened at the end of the magnet monomer 10, the structural damage of the magnet monomer 10 is low, and the structural strength of the magnet assembly 100 can be further improved.

[0057] In addition, according to the electromagnetic induction law and the Lenz law, eddy current is generated in a plane perpendicular to the magnetization direction, the magnet slot 11 penetrates the magnet monomer 10 along the magnetization direction, and the circuit is broken in multiple planes of the magnet monomer 10, thereby further reducing the eddy current loss and improving the efficiency of the motor.

[0058] In the process of product design, the number of magnet slots 11 or the distribution position of the magnet slots 11 on the magnet monomer 10 and the like can be adjusted to meet more product design needs.

[0059] In some embodiments of the utility model, as shown in Figure 5 and Figure 6 The magnet monomer 10 has a magnet slot 11 at both ends in the second direction, and the magnet slots 11 at both ends of the magnet monomer 10 in the second direction are arranged staggered in the first direction. Therefore, the eddy current loss can be further reduced, and the structural damage on the magnet monomer 10 is uniformly distributed, and it is easier to make the structural strength of the magnet monomer 10 meet the design needs.

[0060] In some embodiments of the utility model, as shown in Figure 1 and Figure 2 The magnet monomer 10 has a magnet slot 11 at both ends in the second direction, and the magnet slots 11 at both ends of the magnet monomer 10 in the second direction are arranged opposite in the second direction. Therefore, the eddy current loss can be further reduced, and the gravity distribution on the magnet monomer 10 is uniform, and the dynamic balance of the rotor assembly can be easily realized in the process of motor design.

[0061] In some embodiments of the utility model, as shown in Figure 3 and Figure 4As shown in the drawings, the magnet unit 10 has a magnet slot 11 at one end in the second direction, and the magnet slots 11 on the adjacent magnet units 10 are respectively arranged at the two ends of the magnet unit 10 away from each other in the second direction. Therefore, the distribution of the magnet slots 11 in the magnet assembly 100 is more uniform, and the structure of the magnet unit is less damaged, and it is easier to make the structural strength of the magnet assembly 100 meet the needs.

[0062] In some embodiments of the utility model, the width of the magnet slot 11 is 0.01mm-1mm. For example, the width of the magnet slot 11 can be 0.01mm, 0.05mm, 0.2mm, 0.5mm, 0.7mm, 0.8mm or 1mm, thereby the effect of the magnet slot 11 can meet the use needs, and in the process of product design, the width of the magnet slot 11 can be adjusted to meet more product design needs.

[0063] In some embodiments of the utility model, as shown in the drawings, Figures 1-9 The adjacent magnet units 10 are connected by bonding. The bonding connection can realize the insulation connection between the two adjacent magnet units 10, thereby further reducing the eddy current loss, and in the process of motor operation, shear force will be generated between the two adjacent magnet units 10, the bonding connection has high strength, and it is easier to make the connection strength between the two adjacent magnet units 10 meet the use needs.

[0064] As shown in the drawings, Figures 7-9 The bonding layer 20 can be a closed bonding area, the bonding layer 20 can also be an annular bonding area, and the bonding layer 20 can also be two strip-shaped bonding areas arranged oppositely in the first direction or the second direction.

[0065] In some embodiments of the utility model, the thickness of the bonding layer 20 between the adjacent magnet units 10 is 0.01mm-0.5mm. For example, the thickness of the bonding layer 20 between the adjacent magnet units 10 can be 0.01mm, 0.07mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm, thereby the connection strength between the magnet units 10 and the gap between the magnet units 10 can meet the use needs. In the process of product design, the thickness of the bonding layer 20 can be adjusted to meet more product design needs.

[0066] In some embodiments of the utility model, the magnet unit 10 is one of a neodymium iron boron material piece, a samarium cobalt material piece, a ferrite material piece, a samarium iron nitrogen material or an aluminum nickel cobalt material piece. In the process of product design, the material of the magnet unit 10 can be selected according to the product design needs, wherein the plurality of magnet units 10 in the magnet assembly 100 can be of the same material, and the plurality of magnet units 10 in the magnet assembly 100 can also be of a plurality of different materials respectively.

[0067] Preferably, the materials of at least two of the plurality of magnet units 10 are different. It can be understood that the performance requirements of the magnet units 10 are different at different positions of the motor, and thus different materials of the magnet units 10 can be used at different positions of the magnet assembly 100 according to the requirements of the motor. For example, when the magnet assembly 100 is radially magnetized, the magnet units 10 far from the stator assembly are more susceptible to the harmonic magnetic field of the stator assembly and are more likely to demagnetize first, and the magnet units 10 close to the stator assembly are less susceptible to the harmonic magnetic field of the stator assembly and are more likely to demagnetize later. Therefore, the magnet units 10 close to the stator assembly can be made of low-cost low-coercivity materials, for example, the magnet units 10 close to the stator assembly are made of samarium-iron-nitrogen materials, and the magnet units 10 far from the stator assembly are made of neodymium-iron-boron materials. Thus, the production cost of the motor can be reduced.

[0068] In addition, different magnet units 10 can also be made of different grades of the same material, for example, the magnet units 10 close to the stator assembly are made of high-cost high-coercivity N48UH neodymium-iron-boron materials, and the magnet units 10 far from the stator assembly are made of low-cost low-coercivity N48SH neodymium-iron-boron materials.

[0069] In some embodiments of the present application, the plurality of magnet units 10 includes at least one first unit and at least one second unit, and the size of the first unit is larger than that of the second unit in the magnetization direction.

[0070] That is, the sizes of at least two of the plurality of magnet units 10 are different in the magnetization direction.

[0071] Thus, during the design of the motor, the sizes of the magnet units 10 at different positions of the magnet assembly 100 can be matched according to the requirements of the motor, so that the production materials can be saved and the production cost can be further reduced.

[0072] The specific embodiments of the magnet assembly 100 according to the present application and the comparative embodiments of the conventional technology are described below.

[0073] Embodiment One

[0074] As Figure 1 and Figure 2As shown, the magnet assembly 100 includes two magnet units 10, which are stacked and bonded together in the magnetization direction. Each magnet unit 10 has multiple magnet slots 11 at both ends in the second direction. The magnet slots 11 at both ends of the magnet unit 10 in the second direction are arranged opposite to each other in the second direction. The magnet slots 11 extend along the magnetization direction and penetrate the magnet unit 10 in the magnetization direction. The magnet slots 11 on the two magnet units 10 are staggered in the first direction. The first direction, the second direction and the magnetization direction are perpendicular to each other.

[0075] The dimensions of each magnet unit 10 are 17.5mm*17.5mm*1.7mm. The thickness of the adhesive layer 20 is 0.1mm. The dimensions of the magnet assembly 100 are 17.5mm*17.5mm*3.5mm. The adhesive layer 20 is made of a mixture of high-temperature resistant epoxy AB glue and epoxy resin glue, wherein the ratio of AB glue to epoxy resin glue is 4:3. The depth of the magnet groove 11 is 5.8mm and the width of the magnet groove 11 is 0.2mm. Both magnet units 10 are N48UH grade sintered neodymium iron boron magnets.

[0076] Example 2

[0077] like Figure 3 and Figure 4 As shown, the magnet assembly 100 includes two magnet units 10, which are stacked and bonded together in the magnetization direction. Each magnet unit 10 has a plurality of magnet slots 11 at one end in the second direction. The magnet slots 11 on the two magnet units 10 are respectively located at opposite ends of the magnet units 10 in the second direction. The magnet slots 11 extend along the magnetization direction and penetrate the magnet unit 10 in the magnetization direction. The magnet slots 11 on the two magnet units 10 are staggered in the first direction. The first direction, the second direction and the magnetization direction are perpendicular to each other.

[0078] The dimensions of each magnet unit 10 are 17.5mm*17.5mm*1.7mm. The thickness of the adhesive layer 20 is 0.1mm. The dimensions of the magnet assembly 100 are 17.5mm*17.5mm*3.5mm. The adhesive layer 20 is made of a mixture of high-temperature resistant epoxy AB glue and epoxy resin glue, wherein the ratio of AB glue to epoxy resin glue is 4:3. The depth of the magnet groove 11 is 11.7mm and the width of the magnet groove 11 is 0.2mm. Both magnet units 10 are N48UH grade sintered neodymium iron boron magnets.

[0079] Example 3

[0080] like Figure 5 and Figure 6As shown, the magnet assembly 100 includes two magnet units 10, which are stacked and bonded together in the magnetization direction. Each magnet unit 10 has multiple magnet slots 11 at both ends in the second direction. The magnet slots 11 at both ends of the magnet unit 10 in the second direction are staggered in the first direction. The magnet slots 11 extend along the magnetization direction and penetrate the magnet unit 10 in the magnetization direction. The magnet slots 11 on the two magnet units 10 are staggered in the first direction, and the first direction, the second direction and the magnetization direction are perpendicular to each other.

[0081] The dimensions of each magnet unit 10 are 17.5mm*17.5mm*1.7mm. The thickness of the adhesive layer 20 is 0.1mm. The dimensions of the magnet assembly 100 are 17.5mm*17.5mm*3.5mm. The adhesive layer 20 is made of a mixture of high-temperature resistant epoxy AB glue and epoxy resin glue, wherein the ratio of AB glue to epoxy resin glue is 4:3. The depth of the magnet groove 11 is 11.7mm and the width of the magnet groove 11 is 0.2mm. Both magnet units 10 are N48UH grade sintered neodymium iron boron magnets.

[0082] Comparative Example 1

[0083] like Figure 10 As shown, the magnet assembly 100 includes only one magnet unit 10. The magnet unit 10 is a single piece and does not have a magnet slot. The size of the magnet unit 10 is 17.5mm*17.5mm*3.5mm. The magnet unit 10 is a N48UH grade sintered neodymium iron boron magnet.

[0084] Comparative Example 2

[0085] like Figure 11 As shown, the magnet assembly 100 includes four magnet segments 30 bonded together in a first direction, which is perpendicular to the magnetization direction. The magnet assembly 100 has dimensions of 17.5mm*17.5mm*3.5mm. The adhesive layer 20 is made of a mixture of high-temperature resistant epoxy AB glue and epoxy resin glue, wherein the ratio of AB glue to epoxy resin glue is 4:3. The thickness of the adhesive layer 20 is 0.1mm. The magnet segments 30 are N48UH grade sintered neodymium iron boron magnets.

[0086] Comparative Example 3

[0087] like Figure 12As shown, the magnet assembly 100 includes a magnet monomer 10, the magnet monomer 10 is provided with magnet grooves 11 at both ends in the second direction, the magnet grooves 11 are arranged at intervals in the first direction and penetrate the magnet monomer 10 in the magnetization direction, the magnet grooves 11 at both ends in the second direction are oppositely arranged in the second direction, and the first direction, the second direction and the magnetization direction are perpendicular to each other. The size of the magnet assembly 100 is 17.5mm*17.5mm*3.5mm, the depth of the magnet groove 11 is 5.8mm, the width of the magnet groove 11 is 0.2mm, and the magnet monomer 10 is a sintered neodymium-iron-boron magnet of N48UH brand.

[0088] The eddy current loss and the bending strength of the embodiment one, the embodiment two, the embodiment three, the comparative embodiment one, the comparative embodiment two and the comparative embodiment three are tested, and the following results are obtained.

[0089]

[0090]

[0091] From the above results, it can be concluded that the magnet grooves 11 are arranged on the magnet monomer 10, which can greatly reduce the eddy current loss, and compared with the single magnet monomer 10 arranged in the magnetization direction, the bending strength of the magnet assembly 100 is greatly improved.

[0092] According to the rotor assembly 1000 of the second aspect of the utility model, as shown, Figure 13 The rotor assembly 1000 includes a rotor core 200 and the above-mentioned magnet assembly 100 according to the first aspect of the utility model.

[0093] Specifically, the rotor core 200 is formed with a mounting groove 210, and the magnet assembly 100 is arranged in the mounting groove 210.

[0094] According to the rotor assembly 1000 of the second aspect of the utility model, by arranging the above-mentioned magnet assembly 100 according to the first aspect of the utility model, the eddy current loss in the working process of the motor can be reduced.

[0095] According to the motor of the third aspect of the utility model, the rotor assembly and the stator assembly according to the second aspect of the utility model are arranged, and the stator assembly is arranged on the radial inner side or the radial outer side of the rotor assembly.

[0096] According to the motor of the third aspect of the utility model, by arranging the above-mentioned rotor assembly according to the second aspect of the utility model, the eddy current loss in the working process of the motor can be reduced, the efficiency of the motor can be improved, and the design difficulty and production cost of the motor can be reduced.

[0097] The vehicle according to the fourth aspect of the present application comprises the motor according to the third aspect of the present application.

[0098] The vehicle according to the fourth aspect of the present application can improve the efficiency of the vehicle by setting the motor according to the third aspect of the present application.

[0099] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0100] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0101] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0102] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without mutual contradiction.

[0103] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A magnet assembly, characterized by, Comprising: a plurality of magnet units, the plurality of magnet units being arranged in a stacking manner in a magnetization direction, the magnet units being formed with magnet grooves, the magnet grooves on adjacent magnet units being arranged in a staggered manner in a first direction, the first direction being perpendicular to the magnetization direction.

2. The magnet assembly of claim 1, wherein, The magnet grooves extend through the magnet units in an extension direction of the magnet grooves.

3. The magnet assembly of claim 2, wherein, The magnet units are formed with the magnet grooves at at least one end in a second direction, the magnet grooves extending in the magnetization direction and extending through the magnet units in the magnetization direction, the first direction, the second direction and the magnetization direction being perpendicular to each other.

4. The magnet assembly of claim 3, wherein, The magnet units are formed with the magnet grooves at both ends in the second direction, and the magnet grooves at both ends in the second direction of the magnet units are arranged in a staggered manner in the first direction.

5. The magnet assembly of claim 3, wherein, The magnet units are formed with the magnet grooves at both ends in the second direction, and the magnet grooves at both ends in the second direction of the magnet units are arranged in a staggered manner in the second direction.

6. The magnet assembly of claim 3, wherein, The magnet units are formed with the magnet grooves at one end in the second direction, and the magnet grooves on adjacent magnet units are respectively arranged at two ends of the magnet units facing away from each other in the second direction.

7. The magnet assembly of claim 3, wherein, The width of the magnet grooves is 0.01mm-1mm.

8. The magnet assembly of any one of claims 1-7, wherein, Adjacent magnet units are connected by bonding.

9. The magnet assembly of claim 8, wherein, The thickness of the bonding layer between adjacent magnet units is 0.01mm-0.5mm.

10. The magnet assembly of claim 1, wherein, The plurality of magnet units comprises at least one first unit and at least one second unit, and in the magnetization direction, the size of the first unit is larger than the size of the second unit.

11. A rotor assembly characterized by, Comprising: a rotor core, the rotor core being formed with a mounting groove; The magnet assembly of any one of claims 1-10, the magnet assembly being arranged in the mounting groove.

12. An electric machine characterized by Comprising: The rotor assembly of claim 11; a stator assembly, the stator assembly being arranged radially inward or radially outward of the rotor assembly.

13. A vehicle characterized by comprising: Comprising: The motor of claim 12.

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