Core assemblies, rotors, stators and motors

Abstract

The present invention provides an iron core assembly, a rotor, a stator, and a motor, wherein the iron core assembly includes: a plurality of first iron cores, the plurality of iron cores being distributed circumferentially, and any first iron core including at least two first mating surfaces; and / or a plurality of first magnetic steels, the plurality of magnetic steels being distributed circumferentially, and any first magnetic steel including at least two second mating surfaces; the distance between two adjacent first mating surfaces changes along the axial direction or along the radial direction of the iron core assembly to reduce the secondary air gap around the first iron cores; and / or the distance between two adjacent second mating surfaces changes to reduce the secondary air gap around the first magnetic steels. By adopting the above structure, the secondary air gap in the iron core assembly can be reduced, magnetic voltage drop in the stator or rotor can be avoided, the saturation coefficient of the motor can be reduced, and the performance of the motor can be improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of industrial equipment, and in particular relates to an iron core assembly, a rotor, a stator and a motor. Background Art

[0002] In the motor of the prior art, after the iron core and the magnet are installed, a secondary air gap caused by assembly is often easily present between the iron core and the magnet. The secondary air gap is located in the magnetic circuit of the magnetic flux lines and will produce a magnetic voltage drop, affecting the performance of the motor. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first object of the present invention is to provide an iron core assembly.

[0005] The second object of the present invention is to provide a rotor.

[0006] The third object of the present invention is to provide a stator.

[0007] A fourth object of the present invention is to provide a motor.

[0008] To achieve at least one of the above-mentioned purposes, according to a first aspect of the present invention, a core assembly is proposed, comprising: a plurality of first cores, the plurality of cores being distributed circumferentially, and any first core including at least two first mating surfaces; and / or a plurality of first magnetic steels, the plurality of magnetic steels being distributed circumferentially, and any first magnetic steel including at least two second mating surfaces; in the axial direction or radial direction of the core assembly, the distance between two adjacent first mating surfaces changes to reduce the secondary air gap around the first core; and / or the distance between two adjacent second mating surfaces changes to reduce the secondary air gap around the first magnetic steel.

[0009] The core assembly proposed in the present application can be used in a stator or a rotor. The core assembly includes multiple first cores and / or multiple first magnetic steels. The multiple first cores and the multiple first magnetic steels are all distributed along the circumferential direction, wherein any first core includes at least two first mating surfaces, and any first magnetic steel includes at least two second mating surfaces.

[0010] In a possible technical solution, the iron core assembly is not provided with a first magnetic steel, and only includes a plurality of iron cores, wherein the plurality of iron cores include a plurality of first iron cores.

[0011] In another possible technical solution, the core assembly does not include the first core, but only includes a plurality of magnetic steels, wherein the plurality of magnetic steels include a plurality of first magnetic steels.

[0012] In another possible technical solution, the core assembly includes both a first core and a first magnetic steel.

[0013] Understandably, during the assembly process of the iron core and the magnet, gaps are likely to appear between the iron cores, between the iron cores and the magnets, and between the magnets, thereby forming secondary air gaps, which can lead to a decrease in motor performance. In order to reduce the secondary air gap, the present application sets two adjacent mating surfaces (i.e., two adjacent first mating surfaces, or two adjacent second mating surfaces) as a non-parallel structure, that is, the distance between the two adjacent mating surfaces will change. In this way, when installing the magnet or the iron core, as the magnet or the iron core moves, the distance between the magnet or the iron core and the adjacent components becomes smaller and smaller until the magnet or the iron core is tightly fitted to the mating surface.

[0014] In one possible technical solution, the core assembly comprises a plurality of cores. During assembly of the core assembly, an operator inserts a core between two adjacent first cores. As the core is inserted, the distance between the inserted core and the first mating surface gradually decreases until the core is fully seated and fits snugly with the first cores on both sides, reducing the secondary air gap.

[0015] In one possible technical solution, the core assembly comprises a plurality of magnets. During assembly, an operator inserts the magnet between two adjacent first magnets. As the magnet is inserted, the distance between the inserted magnet and the second mating surface gradually decreases until the magnet is fully seated, affixing the magnet to the first magnets on either side and reducing the secondary air gap.

[0016] In one possible technical solution, the core assembly comprises a plurality of first magnetic steels and a plurality of first cores. During assembly of the core assembly, an operator inserts the first magnetic steels between two adjacent first cores. As the first magnetic steels are inserted, the distance between the inserted first magnetic steels and the first mating surface gradually decreases until the first magnetic steels are fully seated. The first magnetic steels are in contact with the first cores on both sides, thereby reducing the secondary air gap.

[0017] Specifically, the distance between two adjacent mating surfaces changes along the axial direction or the radial direction of the core assembly. The following is an example of a core assembly including a first core and a first magnetic steel:

[0018] In one possible technical solution, the distance between two adjacent first mating surfaces gradually decreases in a direction away from the core assembly's axis, i.e., along the core assembly's radial direction. In this case, the first magnetic steel is moved from the core assembly's axis toward the outside of the core assembly, i.e., the first magnetic steel is inserted at the point where the distance between the two first mating surfaces is greatest. As the first magnetic steel moves, the distance between the first mating surfaces gradually decreases until the first magnetic steel abuts against the first mating surfaces, and the first magnetic steel is tightly attached to the first core.

[0019] In another possible technical solution, the distance between two adjacent first mating surfaces gradually decreases along the axial direction of the core assembly. In this case, the first magnetic steel is inserted at the point where the distance between the two first mating surfaces is greatest. The first magnetic steel is moved along the axial direction of the core assembly. As the first magnetic steel moves, the distance between the first mating surfaces gradually decreases until the first magnetic steel abuts against the first mating surfaces, and the first magnetic steel is tightly fitted to the first core.

[0020] Furthermore, the multiple iron cores may be independent parts, or two adjacent iron cores may be connected into one by a connector.

[0021] In one possible technical solution, the core assembly is further provided with a plurality of connectors, each disposed between two adjacent first cores, to integrally connect the two adjacent first cores. The connectors are flexible and do not affect the position adjustment of the first cores when the positions of the first cores are adjusted. Specifically, the connectors may be chains.

[0022] In another possible technical solution, no connecting parts are provided in the core assembly, and each first core is an independent part. After the position of the first core is adjusted, the first cores are sealed to fix the position of the first core.

[0023] By setting the distance between two adjacent first mating surfaces or two second mating surfaces to change along the axial direction or radial direction of the core assembly, the first magnet or the first core can be tightly fitted with the adjacent magnet or core, so as to reduce the secondary air gap in the core assembly, avoid magnetic voltage drop in the stator or rotor, reduce the saturation coefficient of the motor, and thus improve the performance of the motor.

[0024] The core assembly according to the present invention may also have the following distinguishing technical features:

[0025] In any of the above technical solutions, further, the core assembly also includes: a plurality of second cores, the plurality of second cores are distributed along the circumferential direction, the first cores and the second cores are spaced apart, and the second cores are in contact with the first mating surface.

[0026] In this technical solution, the core assembly is composed of multiple cores. In addition to multiple first cores, the core assembly also includes multiple second cores. The multiple second cores are distributed along the circumference, and the first cores and second cores are spaced apart. When assembling the core assembly, the multiple first cores are first positioned, and then the second core is inserted between two adjacent first cores. The distance between the first mating surfaces of the two adjacent first cores changes along the axial or radial direction of the core assembly. Therefore, during the insertion of the second core, the distance between the second core and the first mating surface gradually decreases until the second core and the first core are in contact. In this way, the secondary air gap between the first core and the second core can be reduced, improving the performance of the motor.

[0027] Furthermore, the minimum distance between two adjacent first matching surfaces is smaller than the maximum cross-sectional dimension of the second core.

[0028] In any of the above technical solutions, further, the core assembly also includes: a plurality of second magnetic steels, the plurality of second magnetic steels are distributed along the circumferential direction, the first magnetic steels and the second magnetic steels are arranged at intervals, and the second magnetic steels are in contact with the second mating surface.

[0029] In this technical solution, the core assembly is composed of multiple magnetic steels. In addition to multiple first magnetic steels, the core assembly also includes multiple second magnetic steels. The multiple second magnetic steels are distributed along the circumference, with the first and second magnetic steels spaced apart. During assembly of the core assembly, the multiple first magnetic steels are first positioned, and then the second magnetic steels are inserted between two adjacent first magnetic steels. The distance between the second mating surfaces of the two adjacent first magnetic steels varies along the axial or radial direction of the core assembly. Therefore, during the insertion of the second magnetic steels, the distance between the second magnetic steels and the second mating surfaces gradually decreases until the second magnetic steels are in contact with the first magnetic steels. This reduces the secondary air gap between the first and second magnetic steels, improving motor performance.

[0030] Furthermore, the minimum distance between two adjacent second matching surfaces is smaller than the maximum cross-sectional dimension of the second magnetic steel.

[0031] In any of the above technical solutions, further, the first iron core and the first magnetic steel are spaced apart and the first iron core and the first magnetic steel are in contact with each other.

[0032] In this technical solution, the core assembly includes multiple first cores and multiple first magnetic steels, with the first cores and first magnetic steels spaced apart. During assembly, the multiple first cores are first positioned, and then the first magnetic steels are inserted between two adjacent first cores. The distance between the first mating surfaces of the two adjacent first cores varies along the axial or radial direction of the core assembly. Therefore, during insertion, the distance between the first magnetic steels and the first mating surfaces gradually decreases until the first magnetic steels are in contact with the first cores. This reduces the secondary air gap between the first magnetic steels and the first cores, improving motor performance.

[0033] Furthermore, the minimum distance between two adjacent first matching surfaces is smaller than the maximum cross-sectional dimension of the first magnetic steel.

[0034] In the above technical solution, further, along the radial direction from the axis of the core assembly to the outer circumference of the core assembly, the distance between two adjacent first matching surfaces and the cross-sectional size of the first magnetic steel gradually decrease.

[0035] In this technical solution, the structure of the core assembly is defined. Specifically, multiple first magnetic steels are spaced apart from multiple first cores, meaning that any first magnetic steel is located between two adjacent first cores. To ensure that any first magnetic steel can fit tightly with the two first cores located on either side, this application defines the first mating surface as follows: specifically, along the radial direction from the core assembly's axis to the outer circumference of the core assembly, the distance between two adjacent first mating surfaces and the cross-sectional dimensions of the first magnetic steel gradually decrease.

[0036] Understandably, in a core assembly with multiple first magnetic steels spaced apart from multiple first cores, the first mating surfaces are side walls of the first cores, and two adjacent first mating surfaces are correspondingly two opposing side walls of two adjacent first cores. During assembly of the first magnetic steels, the first cores are first positioned, and then the first magnetic steels are inserted one by one between the two adjacent first cores.

[0037] Furthermore, in order to enable the first magnetic steel to fit tightly with the first iron core, the first mating surfaces on the two adjacent first iron cores are defined. Specifically, the distance between the two adjacent first mating surfaces gradually decreases from the radial direction along the axis of the iron core assembly to the outer circumference of the iron core assembly. The first magnetic steel can be inserted between the two adjacent first iron cores along the radial direction of the iron core assembly. During the process of inserting the first magnetic steel between the two adjacent first iron cores, as the first magnetic steel moves, the distance between the first magnetic steel and the first mating surfaces of the first iron cores on both sides gradually decreases until the first magnetic steel fits with the first mating surfaces and the first magnetic steel is installed in place. At this time, the first magnetic steel fits tightly with the first iron core.

[0038] Furthermore, in order to avoid the formation of a secondary air gap between the first magnetic steel and the first iron core, the cross-sectional dimensions of the first magnetic steel are also set to gradually decrease along the radial direction from the axis of the iron core assembly to the outer circumference of the iron core assembly. In this way, the side wall of the entire first magnetic steel can be fitted with the first iron core without the phenomenon of partial fitting and partial secondary air gap.

[0039] By setting the distance between two adjacent first mating surfaces and the cross-sectional size of the first magnetic steel to gradually decrease along the radial direction from the axis of the core assembly to the outer circumference of the core assembly, on the one hand, the first magnetic steel can be limited by the first mating surfaces so that the first magnetic steel can be installed in a position that fits the first core; on the other hand, the entire side wall of the first magnetic steel can be tightly fitted with the first core, avoiding the phenomenon of partial fit and partial secondary air gap.

[0040] In the above technical solution, further, along the radial direction of the iron core assembly, both ends of the first magnetic steel are recessed into the edge of the first iron core.

[0041] In this technical solution, the relative position of the first magnetic steel and the first core is further defined. Specifically, when the first magnetic steel is spaced apart from the first core, the ends of the first magnetic steel are recessed into the edges of the first core along the radial direction of the core assembly. In other words, neither end of the first magnetic steel protrudes beyond the first core. This provides a certain degree of protection for the first magnetic steel, preventing damage to the first magnetic steel and also reduces the space occupied by the core assembly.

[0042] By setting the first magnetic steel so that its two ends are recessed in the edge of the first iron core, on the one hand, it can provide a certain degree of protection for the first magnetic steel, avoid damage to the first magnetic steel, extend the working life of the first magnetic steel, and improve the reliability of the product; on the other hand, it reduces the space occupied by the iron core assembly, which is conducive to the miniaturization design of the product.

[0043] In the above technical solution, further, the plurality of first magnetic steels are spaced apart from the plurality of first iron cores, and along the axial direction of the iron core assembly, the distance between two adjacent first matching surfaces and the cross-sectional dimensions of the first magnetic steels change.

[0044] This technical solution defines the structure of the core assembly. Specifically, multiple first magnetic steels are spaced apart from multiple first cores, meaning that any first magnetic steel is located between two adjacent first cores. To ensure that any first magnetic steel can closely mate with the two first cores located on either side, this application defines the first mating surface as follows: specifically, along the axial direction of the core assembly, the distance between two adjacent first mating surfaces and the cross-sectional dimensions of the first magnetic steel vary.

[0045] Understandably, in a core assembly with multiple first magnetic steels spaced apart from multiple first cores, the first mating surfaces are side walls of the first cores, and two adjacent first mating surfaces are correspondingly two opposing side walls of two adjacent first cores. During assembly of the first magnetic steels, the first cores are first positioned, and then the first magnetic steels are inserted one by one between the two adjacent first cores.

[0046] Furthermore, in order to enable the first magnetic steel to fit tightly with the first iron core, the first mating surfaces on the two adjacent first iron cores are defined. Specifically, the distance between the two adjacent first mating surfaces changes along the axial direction of the iron core assembly. The first magnetic steel can be inserted between the two adjacent first iron cores along the axial direction of the iron core assembly. During the process of inserting the first magnetic steel between the two adjacent first iron cores, as the first magnetic steel moves, the distance between the first magnetic steel and the first mating surfaces of the first iron cores on both sides gradually decreases until the first magnetic steel fits with the first mating surfaces and the first magnetic steel is installed in place. At this time, the first magnetic steel fits tightly with the first iron core.

[0047] Furthermore, in order to avoid the formation of a secondary air gap between the first magnetic steel and the first iron core, the cross-sectional dimensions of the first magnetic steel are also set to gradually change along the axial direction of the iron core assembly, and the changing trend of the cross-sectional dimensions of the first magnetic steel is the same as the changing trend of the distance between the two first mating surfaces. In this way, the side wall of the entire first magnetic steel can be fitted with the first iron core without the phenomenon of partial fitting and partial secondary air gap.

[0048] By setting the distance between two adjacent first mating surfaces and the cross-sectional size of the first magnetic steel to gradually change along the axial direction of the core assembly, on the one hand, the first magnetic steel can be limited by the first mating surfaces so that the first magnetic steel can be installed in a position that fits the first core; on the other hand, the entire side wall of the first magnetic steel can be tightly fitted with the first core, avoiding the phenomenon of partial fit and partial secondary air gap.

[0049] In the above technical solution, further, along the axial direction of the core assembly, the distance between two adjacent first matching surfaces and the cross-sectional size of the first magnetic steel gradually increase.

[0050] In this technical solution, the structure of another core assembly is defined. Specifically, along the axial direction of the core assembly, the distance between two adjacent first mating surfaces and the cross-sectional dimensions of the first magnetic steel gradually increase. That is, the distance between any two adjacent first mating surfaces and the cross-sectional dimensions of any first magnetic steel gradually increase along the axial direction of the core assembly. When assembling the first magnetic steel, all first magnetic steels are inserted between two adjacent first cores in the same direction to complete the assembly of the core assembly. This structure enables the one-time assembly of multiple first magnetic steels, resulting in high assembly efficiency.

[0051] In any of the above technical solutions, further, along the axial direction of the core assembly, the distance between at least part of the two adjacent first mating surfaces and the cross-sectional size of at least part of the first magnetic steel gradually increase, and the distance between at least part of the two adjacent first mating surfaces and the cross-sectional size of at least part of the first magnetic steel gradually decrease.

[0052] In this technical solution, the structure of another core assembly is defined. Specifically, along the axial direction of the core assembly, the distance between at least partially adjacent two first mating surfaces and the cross-sectional size of the first magnet gradually increases, and the distance between at least partially adjacent two first mating surfaces and the cross-sectional size of the first magnet gradually decreases. That is to say, when assembling the first magnet, the insertion directions of the multiple first magnets are not the same. In a possible technical solution, along the axial direction of the core assembly, the two first mating surfaces whose distance gradually increases and the two first mating surfaces whose distance gradually decreases are spaced apart, and along the axial direction of the core assembly, the first magnet whose cross-sectional size increases and the first magnet whose cross-sectional size decreases are spaced apart. In this way, it is beneficial to the axial dynamic balance of the rotor where the core assembly is located and the consistent saturation level of the first core.

[0053] In any of the above technical solutions, further, along the axial direction of the core assembly, a plurality of first cores are stacked and a plurality of first magnetic steels are stacked.

[0054] This technical solution defines another core assembly structure. Specifically, along the axial direction of the core assembly, multiple first cores are stacked, and multiple first magnetic steels are stacked. Understandably, when applied to large motors, stacking the core assemblies and first magnetic steels improves the performance of the core assembly to meet the requirements of large motors.

[0055] In any of the above technical solutions, further, along the axial direction of the iron core assembly, the cross-sectional size of the first end of the first magnetic steel is smaller than the cross-sectional size of the second end of the first magnetic steel, the first ends of any two adjacent first magnetic steels are arranged facing each other, or the first ends of any two adjacent first magnetic steels are arranged away from each other, and a distance is left between any two adjacent first magnetic steels.

[0056] This technical solution further defines the structure of the core assembly. When the first magnetic steel and the first core are stacked, the multiple first magnetic steels can adopt the following different structures. Specifically, along the axial direction of the core assembly, the cross-sectional dimensions of the first ends of the first magnetic steels are smaller than the cross-sectional dimensions of the second ends of the first magnetic steels, and any adjacent first ends are arranged facing each other or facing away from each other.

[0057] Specifically, when any adjacent first ends are arranged facing each other, the two adjacent layers of first iron cores can be positioned first, and then the two first magnets are respectively inserted into the two layers of first iron cores facing each other, with a distance left between the two adjacent first iron cores in each layer of first iron cores. The first magnet is inserted between the two adjacent first iron cores, and the two first magnets adjacent to each other along the axial direction are inserted facing each other.

[0058] Specifically, when any adjacent first ends are arranged facing away from each other, one layer of first cores can be positioned first, and then the first magnetic steel can be inserted into the spaces between the first cores in that layer. After the first magnetic steel and the first cores in that layer are assembled, another layer of first cores can be positioned, and then the first magnetic steel can be inserted into the spaces between the first cores in the second layer, completing the assembly of the second layer of first cores and the first magnetic steel. The two assembled layers of first magnetic steel and the first cores can then be assembled.

[0059] Furthermore, a distance is left between any two adjacent layers of first magnetic steel to avoid interference.

[0060] In any of the above technical solutions, further, along the axial direction of the core assembly, the cross-sectional size of the first end of the first magnetic steel is smaller than the cross-sectional size of the second end of the first magnetic steel, and the first end of any first magnetic steel is offset against the second end of the adjacent first magnetic steel.

[0061] In this technical solution, the structure of another core assembly is defined. When multiple first magnetic steels and multiple first cores are stacked, along the axial direction of the core assembly, the cross-sectional size of the first end of the first magnetic steel is smaller than the cross-sectional size of the second end of the first magnetic steel, and the first end of any first magnetic steel abuts against the second end of the axially adjacent first magnetic steel. Specifically, in the process of assembling the first magnetic steel and the first core, the multiple first cores of a layer can be positioned first, and then the multiple first magnetic steels arranged in the layer can be sequentially inserted into the gaps between the first cores of the layer to complete the assembly of the first magnetic steel and the first core of the layer. After completing the assembly of multiple layers of first magnetic steel and first cores of this structure, the first magnetic steel and core assemblies of each layer are stacked to complete the overall installation of the core assembly.

[0062] In the above technical solution, further, any first iron core also includes at least two slot surfaces, at least two first mating surfaces and at least two slot surfaces together form an installation groove, and the installation groove is located on the side of the first iron core close to the axis of the iron core assembly, and the cross-sectional size of the installation groove gradually decreases along the direction from the center of the installation groove to the two ends of the installation groove.

[0063] This technical solution defines the structure of another core assembly. Specifically, any first core includes at least two slot surfaces, which, together with at least two first mating surfaces, form a mounting slot for mounting a first magnetic steel. Specifically, the mounting slot is located on a side of the first core that is closest to the core assembly's axis.

[0064] Furthermore, the mounting slot is a slot body with a variable cross-sectional size. Specifically, the cross-sectional size of the mounting slot gradually decreases from the center of the mounting slot to the ends of the mounting slot. When assembling the first magnet, the first magnet is first inserted axially into the mounting slot, and then the first magnet is moved toward either end of the mounting slot until the first magnet abuts the first mating surface. Since the cross-sectional size of the mounting slot gradually decreases from the center of the mounting slot to the ends of the mounting slot, the distance between the first magnet and the first mating surface gradually decreases as the first magnet moves until the first magnet abuts the first mating surface and the first magnet is installed in place.

[0065] By adopting the above structural design, the first magnetic steel can be limited by the first matching surface, and the first magnetic steel can be closely fitted with the first matching surface, thereby making the first magnetic steel closely fit with the first iron core.

[0066] In the above technical solution, further, two first magnets are provided in any installation slot, the cross-sectional size of the first end of the first magnet is smaller than the cross-sectional size of the second end of the first magnet, and the second ends of the two first magnets located in the same installation slot are arranged facing each other.

[0067] In this technical solution, the structure of the core assembly is further defined. Specifically, two first magnets are disposed within any mounting slot. The cross-sectional dimensions of the first end of each first magnet are smaller than the cross-sectional dimensions of the second end of the first magnet. The second ends of the two first magnets within the same mounting slot are disposed facing each other. When installing the two first magnets, the two first magnets are first inserted into the mounting slot along the axial direction of the core assembly. Force is then applied to each of the two first magnets toward the ends of the mounting slot, causing each first magnet to move toward the end of the mounting slot until the first magnet abuts against the mounting surface. At this point, the first magnet is tightly fitted to the first core.

[0068] By arranging the second ends of the two first magnets located in the same mounting slot toward each other, the first magnet can be pushed toward the end of the mounting slot so that the first magnet and the first iron core are tightly fitted, thereby reducing the secondary air gap between the first magnet and the first iron core.

[0069] The second aspect of the present invention further provides a rotor, comprising the core assembly provided by the first aspect of the present invention.

[0070] The rotor provided in the second aspect of the present invention includes the core assembly provided in the first aspect of the present invention, and thus has all the beneficial effects of the core assembly.

[0071] The third aspect of the present invention further provides a stator, comprising the core assembly provided in the first aspect of the present invention.

[0072] The stator provided in the third aspect of the present invention includes the core assembly provided in the first aspect of the present invention, and thus has all the beneficial effects of the core assembly.

[0073] The fourth aspect of the present invention further provides an electric motor, comprising the core assembly provided in the first aspect of the present invention, or the rotor provided in the second aspect of the present invention, and / or the stator provided in the third aspect of the present invention.

[0074] The motor provided in the fourth aspect of the present invention includes the core assembly proposed in the first aspect of the present invention, or the rotor proposed in the second aspect of the present invention, and / or the stator proposed in the third aspect of the present invention, and therefore has all the beneficial effects of the core assembly, rotor and / or stator.

[0075] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0077] Figure 1 One of the structural schematic diagrams of the core assembly according to one embodiment of the present invention is shown;

[0078] Figure 2 A second structural diagram of an iron core assembly according to an embodiment of the present invention is shown;

[0079] Figure 3 The present invention is shown Figure 2 a cross-sectional view of section AA of the illustrated embodiment;

[0080] Figure 4 A third structural diagram of an iron core assembly according to an embodiment of the present invention is shown;

[0081] Figure 5 A fourth structural diagram of an iron core assembly according to an embodiment of the present invention is shown;

[0082] Figure 6 A fifth structural diagram of an iron core assembly according to an embodiment of the present invention is shown;

[0083] Figure 7A sixth structural diagram of an iron core assembly according to an embodiment of the present invention is shown;

[0084] Figure 8 FIG7 shows a seventh structural diagram of an iron core assembly according to an embodiment of the present invention;

[0085] Figure 9 FIG8 is a structural schematic diagram of an iron core assembly according to an embodiment of the present invention;

[0086] Figure 10 FIG9 shows a ninth structural diagram of an iron core assembly according to an embodiment of the present invention.

[0087] in, Figures 1 to 10 The corresponding relationship between the reference numerals and component names is as follows:

[0088] 100 iron core assembly, 110 first iron core, 111 first matching surface, 112 slot surface, 113 mounting slot, 120 first magnetic steel. DETAILED DESCRIPTION

[0089] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0090] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0091] Refer to the following Figures 1 to 10 The core assembly 100 , rotor, stator, and motor provided according to some embodiments of the present invention are described.

[0092] Example 1:

[0093] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 9 and Figure 10As shown, the first aspect of the present invention proposes a core assembly 100, comprising: a plurality of first cores 110, the plurality of cores being distributed circumferentially, and any first core 110 including at least two first mating surfaces 111; and / or a plurality of first magnetic steels 120, the plurality of magnetic steels being distributed circumferentially, and any first magnetic steel 120 including at least two second mating surfaces; in the axial direction of the core assembly 100 or in the radial direction of the core assembly 100, the distance between two adjacent first mating surfaces 111 changes to reduce the secondary air gap around the first core 110; and / or the distance between two adjacent second mating surfaces changes to reduce the secondary air gap around the first magnetic steel 120.

[0094] The core assembly 100 proposed in the present application can be used in a stator or a rotor. The core assembly 100 includes a plurality of first cores 110 and / or a plurality of first magnetic steels 120. The plurality of first cores 110 and the plurality of first magnetic steels 120 are all distributed along the circumferential direction, wherein any first core 110 includes at least two first mating surfaces 111, and any first magnetic steel 120 includes at least two second mating surfaces.

[0095] In a possible embodiment, the core assembly 100 does not include the first magnetic steel 120 , but only includes a plurality of cores, wherein the plurality of cores include a plurality of first cores 110 .

[0096] In another possible embodiment, the core assembly 100 does not include the first core 110 , but only includes a plurality of magnetic steels, wherein the plurality of magnetic steels include a plurality of first magnetic steels 120 .

[0097] In another possible embodiment, the core assembly 100 includes both the first core 110 and the first magnetic steel 120 .

[0098] Understandably, during the assembly process of the iron core and the magnet, gaps are likely to appear between the iron cores, between the iron cores and the magnets, and between the magnets, thereby forming secondary air gaps, which can lead to a decrease in motor performance. In order to reduce the secondary air gap, the present application sets two adjacent mating surfaces (i.e., two adjacent first mating surfaces 111, or two adjacent second mating surfaces) as a non-parallel structure, that is, the distance between the two adjacent mating surfaces will change. In this way, when installing the magnet or the iron core, as the magnet or the iron core moves, the distance between the magnet or the iron core and the adjacent components becomes smaller and smaller until the magnet or the iron core is tightly fitted to the mating surface.

[0099] In one possible embodiment, the core assembly 100 is composed of multiple cores. During the assembly of the core assembly 100, the operator inserts the core between two adjacent first cores 110. As the core is inserted, the distance between the inserted core and the first mating surface 111 gradually decreases until the core is fully installed. The core fits closely with the first cores 110 on both sides, reducing the secondary air gap.

[0100] In one possible embodiment, the core assembly 100 is composed of multiple magnets. During assembly of the core assembly 100, the operator inserts the magnet between two adjacent first magnets 120. As the magnet is inserted, the distance between the inserted magnet and the second mating surface gradually decreases until the magnet is fully seated. The magnet fits snugly against the first magnets 120 on both sides, reducing the secondary air gap.

[0101] In one possible embodiment, the core assembly 100 comprises a plurality of first magnetic steels and a plurality of first cores. During assembly of the core assembly 100, an operator inserts the first magnetic steel 120 between two adjacent first cores 110. As the first magnetic steel 120 is inserted, the distance between the inserted first magnetic steel 120 and the first mating surface 111 gradually decreases until the first magnetic steel 120 is fully seated. The first magnetic steel 120 is in close contact with the first cores 110 on both sides, reducing the secondary air gap.

[0102] Specifically, the distance between two adjacent mating surfaces changes along the axial direction or radial direction of the core assembly 100. The following is an example of the core assembly 100 including the first core 110 and the first magnetic steel 120:

[0103] In one possible embodiment, the distance between two adjacent first mating surfaces 111 gradually decreases in a direction away from the axis of the core assembly 100, that is, along the radial direction of the core assembly 100. In this case, the first magnetic steel 120 is moved from the axis side of the core assembly 100 toward the outside of the core assembly 100, that is, the first magnetic steel 120 is inserted at the point where the distance between the two first mating surfaces 111 is the largest. As the first magnetic steel 120 moves, the distance between the first mating surfaces 111 gradually decreases until the first magnetic steel 120 and the first mating surfaces 111 abut against each other, and the first magnetic steel 120 and the first core 110 are tightly fitted.

[0104] In another possible embodiment, the distance between two adjacent first mating surfaces 111 gradually decreases along the axial direction of the core assembly 100. In this case, the first magnetic steel 120 is inserted at the point where the distance between the two first mating surfaces 111 is the largest. The first magnetic steel 120 moves along the axial direction of the core assembly 100. As the first magnetic steel 120 moves, the distance between the first mating surfaces 111 gradually decreases until the first magnetic steel 120 abuts against the first mating surfaces 111, and the first magnetic steel 120 and the first core 110 are tightly fitted.

[0105] Furthermore, the multiple iron cores 110 may be independent parts, or two adjacent iron cores 110 may be connected into one by a connector.

[0106] In one possible embodiment, the core assembly 100 is further provided with a plurality of connectors, which are disposed between two adjacent cores 110. The connectors can be used to connect the two adjacent first cores 110 into one. The connectors are flexible and do not affect the position adjustment of the first cores 110 when the position of the first cores 110 is adjusted. Specifically, the connectors can be chains.

[0107] In another possible technical solution, no connecting parts are provided in the core assembly 100, and each first core 110 is an independent part. After the position adjustment of the first core 110 is completed, the first cores 110 are sealed to fix the position of the first core 110.

[0108] By setting the distance between two adjacent first mating surfaces 111 or two second mating surfaces to change along the axial direction of the core assembly 100 or along the radial direction of the core assembly 100, the first magnetic steel 120 or the first core 110 can be tightly fitted with the adjacent magnetic steel or core, so as to reduce the secondary air gap in the core assembly 100, avoid magnetic voltage drop in the stator or rotor, reduce the saturation coefficient of the motor, and thus improve the performance of the motor.

[0109] Example 2:

[0110] like Figure 1 As shown, in a specific embodiment based on the first embodiment, the core assembly 100 further includes: a plurality of second cores, the plurality of second cores are distributed along the circumferential direction, the first core 110 and the second cores are spaced apart, and the second cores are in contact with the first mating surface 111 .

[0111] In this embodiment, the core assembly 100 is composed of a plurality of cores. In addition to a plurality of first cores 110, the core assembly 100 also includes a plurality of second cores. The plurality of second cores are distributed circumferentially, and the first cores 110 and the second cores are spaced apart. When assembling the core assembly 100, the plurality of first cores 110 are first positioned, and then the second core is inserted between two adjacent first cores 110. The distance between the first mating surfaces 111 of the two adjacent first cores 110 changes along the axial or radial direction of the core assembly 100. Therefore, during the insertion of the second core, the distance between the second core and the first mating surface 111 gradually decreases until the second core fits the first core 110. In this way, the secondary air gap between the first core 110 and the second core can be reduced, thereby improving the performance of the motor.

[0112] like Figure 1 As shown, further, the minimum distance D1 between two adjacent first matching surfaces 111 is smaller than the maximum cross-sectional dimension D2 of the second core.

[0113] Example 3:

[0114] like Figure 1 As shown, in a specific embodiment based on the first embodiment, the core assembly 100 further includes: a plurality of second magnetic steels, the plurality of second magnetic steels are distributed along the circumferential direction, the first magnetic steel 120 and the second magnetic steels are spaced apart, and the second magnetic steel is in contact with the second mating surface.

[0115] In this embodiment, the core assembly 100 is composed of multiple magnetic steels. In addition to multiple first magnetic steels 120, the core assembly 100 also includes multiple second magnetic steels. The multiple second magnetic steels are distributed along the circumference, with the first magnetic steels 120 and the second magnetic steels spaced apart. During assembly of the core assembly 100, the multiple first magnetic steels 120 are first positioned, and then the second magnetic steels are inserted between two adjacent first magnetic steels 120. The distance between the second mating surfaces of the two adjacent first magnetic steels 120 varies along the axial or radial direction of the core assembly 100. Therefore, during the insertion process, the distance between the second magnetic steels and the second mating surfaces gradually decreases until the second magnetic steels and the first magnetic steels 120 are in contact. This reduces the secondary air gap between the first and second magnetic steels 120, improving motor performance.

[0116] Furthermore, the minimum distance between two adjacent second matching surfaces is smaller than the maximum cross-sectional dimension of the second magnetic steel.

[0117] Example 4:

[0118] like Figure 1 As shown, in a specific embodiment based on the first embodiment, the first iron core 110 and the first magnetic steel 120 are spaced apart and the first iron core 110 and the first magnetic steel 120 are in contact with each other.

[0119] In this embodiment, the core assembly 100 includes multiple first cores 110 and multiple first magnetic steels 120, wherein the first cores 110 and the first magnetic steels 120 are spaced apart. When assembling the core assembly 100, the multiple first cores 110 are first positioned, and then the first magnetic steels 120 are inserted between two adjacent first cores 110. The distance between the first mating surfaces 111 of the two adjacent first cores 110 changes along the axial or radial direction of the core assembly 100. Therefore, during the insertion process of the first magnetic steels 120, the distance between the first magnetic steels 120 and the first mating surfaces 111 gradually decreases until the first magnetic steels 120 and the first cores 110 are in contact. This reduces the secondary air gap between the first magnetic steels 120 and the first cores 110, thereby improving motor performance.

[0120] Furthermore, the minimum distance between two adjacent first matching surfaces 111 is smaller than the maximum cross-sectional dimension of the first magnetic steel 120 .

[0121] Embodiment 5:

[0122] like Figure 1 As shown, in a specific embodiment based on any of the above embodiments, along the radial direction from the axis of the core assembly 100 to the outer circumference of the core assembly 100, the distance between two adjacent mating surfaces 111 and the cross-sectional size of the first magnetic steel 120 gradually decrease.

[0123] In this embodiment, the structure of the core assembly 100 is defined. Specifically, the plurality of first magnetic steels 120 are spaced apart from the plurality of first cores 110, that is, any first magnetic steel 120 is located between two adjacent first cores 110. To ensure that any first magnetic steel 120 can closely mate with the two first cores 110 located on either side, the present application defines the mating surface 111 as follows: specifically, along the radial direction from the axis of the core assembly 100 to the outer circumference of the core assembly 100, the distance between two adjacent mating surfaces 111 and the cross-sectional dimensions of the first magnetic steel 120 gradually decrease.

[0124] It is understood that in the core assembly 100 in which the plurality of first magnetic steels 120 are spaced apart from the plurality of first cores 110, the mating surfaces 111 are the side walls of the first cores 110, and two adjacent mating surfaces 111 are the opposite side walls of two adjacent first cores 110. During assembly of the first magnetic steels 120, the first cores 110 are first positioned, and then the first magnetic steels 120 are inserted one by one between two adjacent first cores 110.

[0125] Furthermore, in order to enable the first magnetic steel 120 to fit tightly with the first core 110, the mating surfaces 111 on the two adjacent first cores 110 are defined. Specifically, the distance between the two adjacent mating surfaces 111 gradually decreases from the radial direction along the axis of the core assembly 100 to the outer circumference of the core assembly 100. The first magnetic steel 120 can be inserted between the two adjacent first cores 110 along the radial direction of the core assembly 100. In the process of inserting the first magnetic steel 120 between the two adjacent first cores 110, as the first magnetic steel 120 moves, the distance between the first magnetic steel 120 and the mating surfaces 111 of the first cores 110 on both sides gradually decreases until the first magnetic steel 120 fits with the mating surfaces 111 and the first magnetic steel 120 is installed in place. At this time, the first magnetic steel 120 and the first core 110 are tightly fitted.

[0126] Furthermore, in order to avoid the formation of a secondary air gap between the first magnetic steel 120 and the first iron core 110, the cross-sectional dimensions of the first magnetic steel 120 are also set to gradually decrease along the radial direction from the axis of the iron core assembly 100 to the outer circumference of the iron core assembly 100. In this way, the side wall of the entire first magnetic steel 120 can be fitted with the first iron core 110 without the phenomenon of partial fitting and partial secondary air gap.

[0127] By setting the distance between two adjacent mating surfaces 111 and the cross-sectional size of the first magnetic steel 120 to gradually decrease along the radial direction from the axis of the core assembly 100 to the outer circumference of the core assembly 100, on the one hand, the first magnetic steel 120 can be limited by the mating surface 111 so that the first magnetic steel 120 can be installed in a position that fits the first core 110; on the other hand, the entire side wall of the first magnetic steel 120 can be tightly fitted with the first core 110, avoiding the phenomenon of partial fit and partial secondary air gap.

[0128] Furthermore, along the radial direction of the core assembly 100 , both ends of the first magnetic steel 120 are recessed into the edge of the first core 110 .

[0129] In this embodiment, the relative position of the first magnetic steel 120 and the first core 110 is further defined. Specifically, when the first magnetic steel 120 is spaced apart from the first core 110, along the radial direction of the core assembly 100, both ends of the first magnetic steel 120 are recessed into the edge of the first core 110. In other words, neither end of the first magnetic steel 120 protrudes beyond the first core 110. This provides a certain degree of protection for the first magnetic steel 120, preventing damage to the first magnetic steel 120 and also reduces the space occupied by the core assembly 100.

[0130] By setting the first magnetic steel 120 so that both ends are recessed in the edge of the first iron core 110, on the one hand, it can provide a certain degree of protection for the first magnetic steel 120, avoid damage to the first magnetic steel 120, extend the working life of the first magnetic steel 120, and improve the reliability of the product; on the other hand, it reduces the space occupied by the iron core assembly 100, which is conducive to the miniaturization design of the product.

[0131] Example 6:

[0132] like Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in a specific embodiment based on the second embodiment, multiple first magnetic steels 120 are spaced apart from multiple first iron cores 110, and along the axial direction of the iron core assembly 100, the distance between two adjacent mating surfaces 111 and the cross-sectional dimensions of the first magnetic steels 120 change.

[0133] In this embodiment, the structure of the core assembly 100 is defined. Specifically, the plurality of first magnetic steels 120 are spaced apart from the plurality of first cores 110, that is, any first magnetic steel 120 is located between two adjacent first cores 110. To ensure that any first magnetic steel 120 can closely mate with the two first cores 110 located on either side, the present application defines the mating surface 111 as follows: specifically, along the axial direction of the core assembly 100, the distance between two adjacent mating surfaces 111 and the cross-sectional dimensions of the first magnetic steel 120 vary.

[0134] It is understood that in the core assembly 100 in which the plurality of first magnetic steels 120 are spaced apart from the plurality of first cores 110, the mating surfaces 111 are the side walls of the first cores 110, and two adjacent mating surfaces 111 are the opposite side walls of two adjacent first cores 110. During assembly of the first magnetic steels 120, the first cores 110 are first positioned, and then the first magnetic steels 120 are inserted one by one between two adjacent first cores 110.

[0135] Furthermore, in order to enable the first magnetic steel 120 to fit tightly with the first iron core 110, the mating surfaces 111 on the two adjacent first iron cores 110 are defined. Specifically, along the axial direction of the iron core assembly 100, the distance between the two adjacent mating surfaces 111 changes. The first magnetic steel 120 can be inserted between the two adjacent first iron cores 110 along the axial direction of the iron core assembly 100. In the process of inserting the first magnetic steel 120 between the two adjacent first iron cores 110, as the first magnetic steel 120 moves, the distance between the first magnetic steel 120 and the mating surfaces 111 of the first iron cores 110 on both sides gradually decreases until the first magnetic steel 120 fits with the mating surfaces 111. The first magnetic steel 120 is installed in place, and at this time, the first magnetic steel 120 fits tightly with the first iron core 110.

[0136] Furthermore, in order to avoid the occurrence of a secondary air gap between the first magnetic steel 120 and the first iron core 110, the cross-sectional dimensions of the first magnetic steel 120 are also set to gradually change along the axial direction of the iron core assembly 100, and the changing trend of the cross-sectional dimensions of the first magnetic steel 120 is the same as the changing trend of the distance between the two mating surfaces 111. In this way, the side wall of the entire first magnetic steel 120 can be fitted with the first iron core 110 without the phenomenon of partial fitting and partial secondary air gap.

[0137] By setting the distance between two adjacent mating surfaces 111 and the cross-sectional size of the first magnetic steel 120 to gradually change along the axial direction of the core assembly 100, on the one hand, the first magnetic steel 120 can be limited by the mating surface 111 so that the first magnetic steel 120 can be installed in a position that fits the first core 110; on the other hand, the entire side wall of the first magnetic steel 120 can be tightly fitted with the first core 110, avoiding the phenomenon of partial fit and partial secondary air gap.

[0138] Embodiment seven:

[0139] like Figure 2 and Figure 3 As shown, in a specific embodiment based on the fourth embodiment, along the axial direction of the core assembly 100 , the distance between two adjacent matching surfaces 111 and the cross-sectional size of the first magnetic steel 120 gradually increase.

[0140] In this embodiment, another structure of the core assembly 100 is defined. Specifically, along the axial direction of the core assembly 100, the distance between two adjacent mating surfaces 111 and the cross-sectional dimensions of the first magnetic steel 120 gradually increase. That is, the distance between any two adjacent mating surfaces 111 and the cross-sectional dimensions of any first magnetic steel 120 gradually increase along the axial direction of the core assembly 100. When assembling the first magnetic steels 120, all first magnetic steels 120 are inserted between two adjacent first cores 110 in the same direction to complete the assembly of the core assembly 100. This structure enables the simultaneous assembly of multiple first magnetic steels 120, resulting in high assembly efficiency.

[0141] Embodiment 8:

[0142] like Figure 4 As shown, in a specific embodiment based on the fourth embodiment, along the axial direction of the core assembly 100, the distance between at least part of the two adjacent mating surfaces 111 and the cross-sectional size of at least part of the first magnetic steel 120 gradually increase, and the distance between at least part of the two adjacent mating surfaces 111 and the cross-sectional size of at least part of the first magnetic steel 120 gradually decrease.

[0143] In this embodiment, the structure of another core assembly 100 is defined. Specifically, along the axial direction of the core assembly 100, the distance between at least some of the adjacent two mating surfaces 111 and the cross-sectional size of the first magnetic steel 120 gradually increases, and the distance between at least some of the adjacent two mating surfaces 111 and the cross-sectional size of the first magnetic steel 120 gradually decreases. That is to say, when assembling the first magnetic steel 120, the insertion directions of the multiple first magnetic steels 120 are not the same. In a possible embodiment, along the axial direction of the core assembly 100, the two mating surfaces 111 whose distance gradually increases and the two mating surfaces 111 whose distance gradually decreases are arranged at intervals, and along the axial direction of the core assembly 100, the first magnetic steel 120 whose cross-sectional size increases and the first magnetic steel 120 whose cross-sectional size decreases are arranged at intervals. In this way, it is beneficial to the axial dynamic balance of the rotor where the core assembly 100 is located and the consistent saturation level of the first core 110.

[0144] Embodiment 9:

[0145] like Figure 6 、 Figure 7 and Figure 8 As shown, in a specific embodiment based on any of the above embodiments, along the axial direction of the core assembly 100, a plurality of first cores 110 are stacked and a plurality of first magnetic steels 120 are stacked.

[0146] In this embodiment, another structure of the core assembly 100 is defined. Specifically, along the axial direction of the core assembly 100, a plurality of first cores 110 are stacked, and a plurality of first magnetic steels 120 are stacked. It is understood that when applied to large motors, the stacking of the core assemblies 100 and the stacking of the first magnetic steels 120 improves the performance of the core assembly 100 to meet the requirements of large motors.

[0147] Embodiment 10:

[0148] like Figure 6 、 Figure 7 and Figure 8 As shown, in a specific embodiment based on the seventh embodiment, along the axial direction of the core assembly 100, the cross-sectional dimension of the first end of the first magnetic steel 120 is smaller than the cross-sectional dimension of the second end of the first magnetic steel 120, and the first ends of any two adjacent first magnetic steels 120 are arranged facing each other, or the first ends of any two adjacent first magnetic steels 120 are arranged away from each other, and a distance is left between any two adjacent first magnetic steels 120.

[0149] In this embodiment, the structure of the core assembly 100 is further defined. When the first magnetic steels 120 and the first core 110 are stacked, the multiple first magnetic steels 120 can adopt the following different structures. Specifically, along the axial direction of the core assembly 100, the cross-sectional dimensions of the first ends of the first magnetic steels 120 are smaller than the cross-sectional dimensions of the second ends of the first magnetic steels 120, and any adjacent first ends are arranged to face each other or to face away from each other.

[0150] like Figure 6 As shown, specifically, when any adjacent first ends are arranged facing each other, the two adjacent layers of first iron cores 110 can be positioned first, and then the two first magnetic steels 120 are respectively inserted into the two layers of first iron cores 110 facing each other, with a distance left between the two adjacent first iron cores 110 in each layer of first iron cores 110, and the first magnetic steels 120 are inserted between the two adjacent first iron cores 110, and the two first magnetic steels 120 adjacent to each other along the axial direction are inserted towards each other.

[0151] like Figure 7 As shown, specifically, when any adjacent first ends are arranged facing away from each other, one layer of first cores 110 can be positioned first, and then the first magnetic steels 120 can be inserted into the spaces between the first cores 110 in that layer. After the first magnetic steels 120 in that layer are assembled with the first cores 110, another layer of first cores 110 can be positioned, and then the first magnetic steels 120 can be inserted into the spaces between the second layer of first cores 110, completing the assembly of the second layer of first cores 110 with the first magnetic steels 120. Thereafter, the two assembled layers of first magnetic steels 120 and the first cores 110 can be assembled.

[0152] Furthermore, a distance is left between any two adjacent layers of first magnetic steels 120 to avoid interference.

[0153] Example 11:

[0154] like Figure 8 As shown, in a specific embodiment based on the seventh embodiment, along the axial direction of the core assembly 100, the cross-sectional dimension of the first end of the first magnetic steel 120 is smaller than the cross-sectional dimension of the second end of the first magnetic steel 120, and the first end of any first magnetic steel 120 is offset against the second end of the adjacent first magnetic steel 120.

[0155] In this embodiment, another structure of the core assembly 100 is defined. When multiple first magnetic steels 120 and multiple first cores 110 are stacked, along the axial direction of the core assembly 100, the cross-sectional dimensions of the first ends of the first magnetic steels 120 are smaller than the cross-sectional dimensions of the second ends of the first magnetic steels 120, and the first ends of any first magnetic steels 120 abut against the second ends of the axially adjacent first magnetic steels 120. Specifically, during the assembly of the first magnetic steels 120 and the first cores 110, the multiple first cores 110 in a layer can be positioned first, and then the multiple first magnetic steels 120 disposed in that layer can be sequentially inserted into the spaces between the first cores 110 in that layer to complete the assembly of the first magnetic steels 120 and the first cores 110 in that layer. After completing the assembly of multiple layers of the first magnetic steels 120 and the first cores 110 in this structure, the first magnetic steels 120 and the core assembly 100 in each layer can be stacked and installed to complete the overall assembly of the core assembly 100.

[0156] Example 12:

[0157] like Figure 9 As shown, in a specific embodiment based on Example 1, any first iron core 110 also includes at least two slot surfaces 112, at least two mating surfaces 111 and at least two slot surfaces 112 together form an installation groove 113, and the installation groove 113 is located on the side of the first iron core 110 close to the axis of the iron core assembly 100, and the cross-sectional size of the installation groove 113 gradually decreases along the direction from the center of the installation groove 113 to the two ends of the installation groove 113.

[0158] In this embodiment, the structure of another core assembly 100 is defined. Specifically, any first core 110 includes at least two slot surfaces 112. The at least two slot surfaces 112 and at least two mating surfaces 111 together form a mounting slot 113. The mounting slot 113 is used to mount a first magnetic steel 120. Specifically, the mounting slot 113 is located on a side of the first core 110 that is close to the axis of the core assembly 100.

[0159] Furthermore, the mounting slot 113 is a slot body with a variable cross-sectional dimension. Specifically, the cross-sectional dimension of the mounting slot 113 gradually decreases from the center of the mounting slot 113 to the ends of the mounting slot 113. When assembling the first magnetic steel 120, the first magnetic steel 120 is first inserted axially into the mounting slot 113, and then the first magnetic steel 120 is moved toward either end of the mounting slot 113 until the first magnetic steel 120 abuts against the mating surface 111. Since the cross-sectional dimension of the mounting slot 113 gradually decreases from the center of the mounting slot 113 to the ends of the mounting slot 113, the distance between the first magnetic steel 120 and the mating surface 111 also gradually decreases as the first magnetic steel 120 moves, until the first magnetic steel 120 abuts against the mating surface 111 and the first magnetic steel 120 is installed in place.

[0160] By adopting the above structural design, the first magnetic steel 120 can be limited by the matching surface 111, and the first magnetic steel 120 can be closely fitted with the matching surface 111, thereby making the first magnetic steel 120 closely fit with the first iron core 110.

[0161] Furthermore, two first magnetic steels 120 are provided in any mounting slot 113 , the cross-sectional dimension of the first end of the first magnetic steel 120 is smaller than the cross-sectional dimension of the second end of the first magnetic steel 120 , and the second ends of the two first magnetic steels 120 located in the same mounting slot 113 are arranged facing each other.

[0162] In this embodiment, the structure of the core assembly 100 is further defined. Specifically, two first magnetic steels 120 are disposed in any mounting slot 113. The cross-sectional dimensions of the first end of any first magnetic steel 120 are smaller than the cross-sectional dimensions of the second end of the first magnetic steel 120. The second ends of the two first magnetic steels 120 located in the same mounting slot 113 are disposed facing each other. When installing the two first magnetic steels 120, the two first magnetic steels 120 are first inserted into the mounting slot 113 along the axial direction of the core assembly 100. Then, forces are applied to the two first magnetic steels 120 toward the ends of the mounting slot 113, respectively, so that any first magnetic steel 120 moves toward the end of the mounting slot 113 until the first magnetic steel 120 abuts against the mounting surface. At this point, the first magnetic steel 120 is tightly fitted to the first core 110.

[0163] By arranging the second ends of the two first magnetic steels 120 located in the same mounting groove 113 toward each other, the first magnetic steel 120 can be pushed toward the end of the mounting groove 113 so as to fit tightly against the first iron core 110, thereby reducing the secondary air gap between the first magnetic steel 120 and the first iron core 110.

[0164] Example 13:

[0165] The second aspect of the present invention further provides a rotor, comprising the core assembly 100 provided in the first aspect of the present invention.

[0166] The rotor provided in the second aspect of the present invention includes the core assembly 100 provided in the first aspect of the present invention, and thus has all the beneficial effects of the core assembly 100 .

[0167] Example 14:

[0168] The third aspect of the present invention further provides a stator, comprising the core assembly 100 provided in the first aspect of the present invention.

[0169] The stator provided in the third aspect of the present invention includes the core assembly 100 provided in the first aspect of the present invention, and thus has all the beneficial effects of the core assembly 100 .

[0170] Embodiment 15:

[0171] The fourth aspect of the present invention further provides a motor, comprising the core assembly 100 provided in the first aspect of the present invention, or the rotor provided in the second aspect of the present invention, and / or the stator provided in the third aspect of the present invention.

[0172] The motor provided in the fourth aspect of the present invention includes the core assembly 100 proposed in the first aspect of the present invention, or the rotor proposed in the second aspect of the present invention, and / or the stator proposed in the third aspect of the present invention, and therefore has all the beneficial effects of the core assembly 100 or the rotor and / or the stator.

[0173] Example 16:

[0174] The iron core assembly 100 proposed in the present application is provided with a first mating surface 111 on the first iron core 110. The first magnetic steel groove enclosed by the first mating surface 111 adopts a wedge-shaped or wedge-like structure. The first iron core 110 and the first magnetic steel 120 both adopt a wedge-shaped or wedge-like shape. The two can achieve a relatively perfect fit through translation and pushing, thereby achieving the purpose of reducing or eliminating the secondary air gap, thereby reducing the magnetic pressure drop in the non-main air gap part.

[0175] The matching direction is not limited to radial, axial, and tangential directions, and any angular matching direction is sufficient.

[0176] The first magnetic steel slot and the first magnetic steel 120 in the core assembly 100 both adopt a wedge-shaped structure. The first magnetic steel 120 is inserted along the wedge-shaped small end. During the manufacturing process, the first mating surface 111 is pressed tightly by external force or suction (such as Figure 1 The external force F) shown in the figure is used to eliminate the secondary air gap.

[0177] Regarding the wedge shape, it can be a trapezoid or an arc-shaped sharp corner. The core is that it can be tightly matched with the first magnetic steel slot at a certain angle.

[0178] like Figure 1 As shown, during the assembly process, the first magnetic steel 120 is inserted along the wedge-shaped direction. During the initial insertion, the distance between the end face of the first magnetic steel 120 and the outer edge of the first core 110 is L. As the first magnetic steel 120 is further inserted, the distance between the end face of the first magnetic steel 120 and the outer edge of the first core 110 becomes L1, where L1 is smaller than L. During the manufacturing process, tooling is required to provide a push to ensure that the first magnetic steel 120 and the first core 110 fit tightly together.

[0179] like Figure 2 As shown, the first magnetic steel 120 can adopt an axial wedge structure, which can be more conducive to the push of the first magnetic steel 120. Figure 4 As shown, the wedge shape can be alternately arranged in positive and negative directions, which is beneficial to the axial dynamic balance of the rotor and the uniform saturation level of the first iron core 110.

[0180] like Figure 6 、 Figure 7 and Figure 8 As shown, it can be in a layered or stacked form, and this structure is more suitable for motors of a larger size.

[0181] The wedge angle is more suitable at about 5°. If it is larger, the first magnet 120 is easily demagnetized and the uniformity is crossed. When the angle is smaller, the size error will cause the magnet position to fluctuate greatly, resulting in poor dynamic balance of the rotor.

[0182] In the present invention, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; and "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0183] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0184] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A core assembly, characterized in that: include: A plurality of first cores, wherein the plurality of first cores are distributed along a circumferential direction, and any of the first cores comprises at least two first mating surfaces; a plurality of first magnetic steels, wherein the plurality of first magnetic steels are distributed along a circumferential direction, and any of the first magnetic steels includes at least two second mating surfaces; In the axial direction or radial direction of the core assembly, the distance between two adjacent first mating surfaces changes to reduce the secondary air gap around the first core; The distance between two adjacent second mating surfaces changes to reduce the secondary air gap around the first magnetic steel; The core assembly further comprises: a plurality of second cores, the plurality of second cores being distributed along a circumferential direction, the first cores being spaced apart from the second cores, and the second cores being in contact with the first mating surface; Wherein, the minimum distance between two adjacent first matching surfaces is smaller than the maximum cross-sectional dimension of the second core.

2. The core assembly according to claim 1, wherein: Also includes: A plurality of second magnetic steels are distributed along the circumferential direction, the first magnetic steel and the second magnetic steel are spaced apart, and the second magnetic steel is in contact with the second mating surface.

3. The core assembly according to claim 1, wherein: The first iron core and the first magnetic steel are spaced apart, and the first iron core and the first magnetic steel are in contact with each other.

4. The core assembly according to claim 3, wherein: Along the radial direction from the axis of the core assembly to the outer circumference of the core assembly, the distance between two adjacent first matching surfaces and the cross-sectional size of the first magnetic steel gradually decrease.

5. The core assembly according to claim 4, characterized in that Along the radial direction of the iron core assembly, two ends of the first magnetic steel are recessed into the edge of the first iron core.

6. The core assembly according to claim 3, wherein: The plurality of first magnetic steels are spaced apart from the plurality of first iron cores, and along the axial direction of the iron core assembly, the distance between two adjacent first matching surfaces and the cross-sectional dimensions of the first magnetic steels change.

7. The core assembly according to claim 6, wherein: Along the axial direction of the core assembly, the distance between two adjacent first matching surfaces and the cross-sectional size of the first magnetic steel gradually increase.

8. The core assembly according to claim 6, wherein: Along the axial direction of the core assembly, the distance between at least partially adjacent two first mating surfaces and the cross-sectional size of at least partially the first magnetic steel gradually increase, and the distance between at least partially adjacent two first mating surfaces and the cross-sectional size of at least partially the first magnetic steel gradually decrease.

9. The core assembly according to claim 3, wherein: Along the axial direction of the iron core assembly, a plurality of the first iron cores are stacked and a plurality of the first magnetic steels are stacked.

10. The core assembly according to claim 9, wherein: Along the axial direction of the iron core assembly, the cross-sectional dimension of the first end of the first magnetic steel is smaller than the cross-sectional dimension of the second end of the first magnetic steel. The first ends of any two adjacent first magnetic steels are arranged facing each other, or the first ends of any two adjacent first magnetic steels are arranged away from each other, and a distance is left between any two adjacent first magnetic steels.

11. The core assembly according to claim 9, wherein: Along the axial direction of the core assembly, the cross-sectional dimension of the first end of the first magnetic steel is smaller than the cross-sectional dimension of the second end of the first magnetic steel, and the first end of any one of the magnetic steels abuts against the second end of the adjacent first magnetic steel.

12. The core assembly according to claim 1, wherein: Any of the first iron cores also includes at least two slot surfaces, and the at least two first mating surfaces and the at least two slot surfaces together form an installation groove. The installation groove is located on the side of the first iron core close to the axis of the iron core assembly, and the cross-sectional size of the installation groove gradually decreases along the direction from the center of the installation groove to the two ends of the installation groove.

13. The core assembly according to claim 12, wherein: Two first magnetic steels are provided in any of the installation slots, the cross-sectional dimension of the first end of the first magnetic steel is smaller than the cross-sectional dimension of the second end of the first magnetic steel, and the second ends of the two first magnetic steels located in the same installation slot are arranged facing each other.

14. A rotor, characterized in that: include: The core assembly according to any one of claims 1 to 13.

15. A stator, characterized in that: include: The core assembly according to any one of claims 1 to 13.

16. A motor, characterized in that: include: The rotor according to claim 14; or The stator according to claim 15.

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