Multi-layer and multi-stage rotor and magnetizing equipment

Abstract

The utility model discloses a multilayer multistage rotor and magnetizing equipment, which comprises a plurality of single-layer rotors, the plurality of single-layer rotors form a multilayer structure in a stacking mode, two adjacent layers of single-layer rotors are connected through a precise mechanical structure, and the plurality of single-layer rotors are arranged in a staggered mode in the stacking process. Each single-layer rotor comprises a rotor iron core, each rotor iron core is provided with a permanent magnet groove, the permanent magnet grooves penetrate through the rotor iron cores, and every two adjacent rotor iron cores are fixedly connected. According to the multi-layer multi-stage rotor provided by the embodiment of the utility model, the plurality of single-layer rotors are stacked and arranged in the staggered manner, so that the interaction between current and a magnetic field between layers is enhanced, the working efficiency and the electromagnetic performance of the multi-layer multi-stage rotor are improved, single magnetizing can be realized in the magnetizing process of the multi-layer multi-stage rotor, and the magnetizing efficiency of the multi-layer multi-stage rotor is improved. And meanwhile, the situation of more interference between adjacent single-layer rotors can be avoided, and normal magnetizing work of the multi-layer and multi-stage rotor is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetizing device technical field especially relates to a multilayer multistage rotor and magnetizing equipment. BACKGROUND

[0002] The whole magnetizing technology of the rotor of the permanent magnet motor is a kind of magnetizing mode that all magnetic steels are magnetized by magnetizing coil once after the assembly of the magnetic steel and the motor rotor is completed.In the magnetizing process, high-voltage capacitor type magnetizing machine is usually used to discharge coil instantaneously, and strong magnetic field is generated in magnetizing coil by large current in a short time to saturate and magnetize magnetic steel.

[0003] In the prior art, the magnetizable object to be magnetized is generally placed in the magnetic field formed by the coil with direct current, and the magnetizing direction can be divided into thickness magnetizing, radial magnetizing and the like.When affected by external energy, such as heating and impact, the magnetic moment directions of each magnetic domain will become inconsistent, and the magnetism will weaken or disappear, at which time demagnetization occurs, and the original properties need to be magnetized.There are many components that need to be magnetized in the current life, for example, the rotor in the new energy automobile motor needs to be magnetized before being put into use.

[0004] At present, most of the rotors in the electric motor are single-layer coils, which are relatively simplified in structure, and the manufacturing process is relatively easy, thereby reducing the manufacturing cost, however, the electromagnetic wave type generated by the single-layer coil may not be ideal, thereby affecting the performance and efficiency of the motor, in addition, the interaction between the current and the magnetic field of the single-layer coil is weak, which is not conducive to the normal work of the motor. SUMMARY

[0005] Therefore, it is necessary to provide a multilayer multistage rotor and magnetizing equipment to solve the problems of low performance and low working efficiency of the single-layer rotor in the prior art.

[0006] The multilayer multistage rotor provided by the utility model embodiment comprises a plurality of single-layer rotors, the plurality of single-layer rotors form a multilayer structure in a stacking manner, and adjacent two single-layer rotors are connected through a precise mechanical structure, the plurality of single-layer rotors are arranged in a staggered manner during stacking, each single-layer rotor comprises a rotor core, a permanent magnet slot is arranged on each rotor core, the permanent magnet slot penetrates the rotor core, each rotor core has the same shape, and adjacent two rotor cores are fixedly connected.

[0007] The multi-layer multi-stage rotor of the utility model embodiment comprises a plurality of single-layer rotors, the plurality of single-layer rotors are stacked to form a multi-layer structure and thus form the multi-layer multi-stage rotor, the multi-layer multi-stage rotor has a short magnetic circuit, thus reducing the loss and improving the efficiency of the motor, and the multi-layer multi-stage rotor has a low power density and a short magnetic circuit, which is beneficial to improving the current output capacity of the motor and improving the overall performance of the multi-layer multi-stage rotor.In addition, the two adjacent rotors are arranged in a staggered manner instead of one-to-one correspondence, and due to the stacking and staggered arrangement of the plurality of single-layer rotors, the interaction between the interlayer current and the magnetic field is enhanced, thereby improving the working efficiency and electromagnetic performance of the multi-layer multi-stage rotor, and single magnetization can be realized during the magnetization process of the multi-layer multi-stage rotor, and the interference between the adjacent single-layer rotors can be avoided, which is beneficial to the normal magnetization work of the multi-layer multi-stage rotor.

[0008] In some embodiments, the staggered arrangement is that the rotor cores of the two adjacent single-layer rotors are staggered in the circumferential direction or the radial direction.

[0009] In some embodiments, the permanent magnet slot is arranged at the edge of the rotor core and surrounds the rotor core.

[0010] In some embodiments, the permanent magnet slot comprises a plurality of adjacent permanent magnet slot groups, the distance between the two adjacent permanent magnet slot groups is the same, each permanent magnet slot group comprises a first slot group and a second slot group, the first slot group and the second slot group are arranged in front of and behind each other, and the distance from the first slot group to the center of the rotor core is smaller than the distance from the second slot group to the center of the rotor core.

[0011] In some embodiments, the first slot group comprises two first slots, the two first slots are arranged in a figure-eight shape, the second slot group comprises two second slots, and the two second slots are arranged in a figure-eight shape.

[0012] In some embodiments, the size of the first slot is larger than the size of the second slot.

[0013] In some embodiments, the multi-layer multi-stage rotor further comprises a plurality of permanent magnets, the permanent magnets comprise a first magnet and a second magnet, the first magnet is installed in the first slot, and the second magnet is installed in the second slot.

[0014] In some embodiments, an insulating layer is arranged between the two adjacent rotor cores.

[0015] In some embodiments, each of the first slot is provided with a first holding part and a first limiting protrusion, the first holding part and the first limiting protrusion are respectively arranged at both ends of the first slot, in the case of the first magnet arranged in the first slot, one end of the first magnet abuts against the first holding part, and the other end of the first magnet abuts against the first limiting protrusion, each of the second slot is provided with a second holding part and a second limiting protrusion, the second holding part and the second limiting protrusion are respectively arranged at both ends of the second slot, in the case of the second magnet arranged in the second slot, one end of the second magnet abuts against the second holding part, and the other end of the second magnet abuts against the second limiting protrusion.

[0016] In the case of the first magnet arranged in the first slot, there is a gap between the first magnet and the first slot, and there is a gap between the second magnet and the second slot.

[0017] A magnetizing equipment, comprising:

[0018] A body, the magnetizing equipment is provided with a magnetizing assembly;

[0019] The multi-layer multi-stage rotor of any one of the above, in the case of the multi-layer multi-stage rotor being installed on the magnetizing assembly, the magnetizing assembly is used for saturating magnetizing the multi-layer multi-stage rotor.

[0020] The multi-layer multi-stage rotor provided by the embodiment of the utility model, the multi-layer multi-stage rotor includes a plurality of single-layer rotors, the plurality of single-layer rotors are stacked to form a multi-layer structure and thus form the multi-layer multi-stage rotor, the multi-layer multi-stage rotor has a short magnetic circuit, which can reduce the loss, help to improve the efficiency of the motor, and the multi-layer multi-stage rotor has a low power density and a short magnetic circuit density, which is beneficial to improving the current output capacity of the motor to improve the overall performance of the multi-layer multi-stage rotor. In addition, the two adjacent rotors are arranged in a staggered manner instead of one-to-one correspondence, and the interaction between the interlayer current and the magnetic field is enhanced due to the stacking and staggered arrangement of the plurality of single-layer rotors, thereby improving the working efficiency and electromagnetic performance of the multi-layer multi-stage rotor, and single magnetization can be realized during the magnetization of the multi-layer multi-stage rotor, and the interference between the adjacent single-layer rotors can be avoided, which is beneficial to the normal magnetization of the multi-layer multi-stage rotor.

[0021] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0023] Figure 1 is a three-dimensional structure schematic diagram of the magnetizing equipment of the embodiment of the present application;

[0024] Figure 2 is a plane structure schematic diagram of the multi-layer multi-stage rotor of the embodiment of the present application;

[0025] Figure 3 is an exploded structure schematic diagram of the multi-layer multi-stage rotor of the embodiment of the present application;

[0026] Figure 4 is a plane structure schematic diagram of the single-layer rotor of the embodiment of the present application.

[0027] Main element symbol explanation:

[0028] Multi-layer multi-stage rotor 100, single-layer rotor 10, rotor iron core 101, permanent magnet slot 102, permanent magnet slot group 20, first slot group 201, first slot 2011, first abutting part 2012, first limiting protrusion 2013, second slot group 202, second slot 2021, second abutting part 2022, second limiting protrusion 2023, permanent magnet 30, first magnet 301, second magnet 302, magnetizing equipment 1000, magnetizing assembly 1001, machine body 1002. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations 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 only used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise explicitly specified and limited.

[0031] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection or can communicate with each other, it can be directly connected, or indirectly connected through 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 utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] The disclosure below provides many different implementations or examples to implement different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0034] Please refer to Figures 1 to 4 The multi-layer multi-stage rotor 100 provided by the embodiment of the present application includes a plurality of single-layer rotors 10, the plurality of single-layer rotors 10 form a multi-layer structure in a stacking manner, and the adjacent two single-layer rotors 10 are connected through a precise mechanical structure. The plurality of single-layer rotors 10 are arranged in a staggered manner during stacking. Each single-layer rotor 10 includes a rotor core 101, and a permanent magnet slot 102 is arranged on each rotor core 101. The permanent magnet slot 102 penetrates the rotor core 101. Each rotor core 101 has the same shape, and the adjacent two rotor cores 101 are fixedly connected.

[0035] In the multi-layer multi-stage rotor 100 provided by the embodiment of the present application, the multi-layer multi-stage rotor 100 includes a plurality of single-layer rotors 10, and the plurality of single-layer rotors 10 form a multi-layer structure in a stacking manner to form the multi-layer multi-stage rotor 100. In this way, the magnetic circuit of the multi-layer multi-stage rotor 100 is short, which can reduce the loss, help to improve the efficiency of the motor, and the power density of the multi-layer multi-stage rotor 100 is low, and the magnetic circuit density is short, which is beneficial to improve the current output capability of the motor to improve the overall performance of the multi-layer multi-stage rotor 100. In addition, the adjacent two rotors are arranged in a staggered manner, not one-to-one correspondence. Since the plurality of single-layer rotors 10 are stacked and arranged in a staggered manner, the interaction between the interlayer current and the magnetic field is enhanced, thereby improving the working efficiency and electromagnetic performance of the multi-layer multi-stage rotor 100. In addition, the single magnetization can be realized during the magnetization process of the multi-layer multi-stage rotor 100, and the interference between the adjacent single-layer rotors 10 can also be avoided, which is beneficial to the normal magnetization work of the multi-layer multi-stage rotor 100.

[0036] In the embodiment of the present application, the single-layer rotors 10 in the multi-layer multi-stage rotor 100 are stacked and arranged in a staggered manner, which has the following advantages:

[0037] 1. Improved electromagnetic efficiency: By staggering the distribution of the single-layer rotors 10, the electromagnetic fields between them can interact more effectively, enhancing the overall electromagnetic performance of the motor. The staggering also helps to reduce the mutual cancellation of electromagnetic fields between the single-layer rotors 10, improving the conversion efficiency of electromagnetic energy.

[0038] 2. Reduced energy consumption: As mentioned in point 1, the staggering of the single-layer rotors 10 improves the electromagnetic efficiency of the multi-layer multi-stage rotor 100. Due to the increased electromagnetic efficiency, the motor can utilize electrical energy more effectively during operation, reducing energy consumption. The staggering also helps to reduce the heat generated by the motor, further improving energy utilization efficiency.

[0039] 3. Optimized heat dissipation performance: The staggering of the single-layer rotors 10 helps to increase the heat dissipation area and improve heat dissipation efficiency. This design allows the motor to maintain a lower temperature during long-term operation, extending the service life of the motor.

[0040] 4. Reduced vibration and noise: The staggering of the single-layer rotors 10 balances the force distribution between them, reducing vibrations caused by imbalance. The reduction in vibrations means that noise will also be reduced, improving the smooth operation of the motor.

[0041] 5. Enhanced structural strength: Through reasonable staggering design, the connection strength between the single-layer rotors 10 can be enhanced, improving the structural stability of the entire multi-layer multi-stage rotor 100. This helps to prevent deformation or damage of the multi-layer multi-stage rotor 100 during high-speed rotation due to uneven stress.

[0042] 6. Improved fault tolerance: In the structure of the multi-layer multi-stage rotor 100, even if one or more single-layer rotors 10 fail, the motor can still continue to operate due to the presence of other normal single-layer rotors 10. The staggering helps to disperse the impact of failures, improving the fault tolerance and reliability of the motor.

[0043] 7. Adaptability to various application scenarios: The staggered multi-layer multi-stage rotor 100 design has high flexibility and adaptability, meeting the needs of different application scenarios.

[0044] For example, in situations requiring high speed, high torque, or fine speed regulation, this design can provide better performance.

[0045] As mentioned above, the staggering design between the single-layer rotors 10 of the multi-layer multi-stage rotor 100 not only improves the electromagnetic efficiency and energy utilization efficiency of the motor, but also optimizes heat dissipation performance, reduces vibration and noise, enhances structural strength, improves fault tolerance, and adapts to the needs of various application scenarios.

[0046] In the embodiment of the utility model, each single layer rotor 10 is same in shape, and same in shape refers to each single layer rotor 10 is circular, and same in radius / diameter, a plurality of single layer rotors 10 are stacked and same in circular, in addition, the position and size relation of permanent magnet slot 102 on each single layer rotor 10 are also same.

[0047] Please refer to Figure 2 In some embodiments, the misaligned arrangement is that the rotor cores 101 of the adjacent two single layer rotors 10 are misaligned in the circumferential direction or the radial direction.

[0048] Further, the misaligned arrangement of the plurality of single layer rotors 10 during stacking refers to a certain rotation angle is formed between the adjacent two single layer rotors 10, and therefore, the edges of the adjacent single layer rotors 10 are not aligned.

[0049] For example, in one example, the multi-layer multi-stage rotor 100 includes four single layer rotors 10, and in the initial state, the four single layer rotors 10 are stacked one by one, at this time, the multi-layer multi-stage rotor 100 has single layer rotor A, single layer rotor B, single layer rotor C, single layer rotor D from bottom to top, at this time, the projection of single layer rotor A on single layer rotor B coincides with single layer rotor B, the projection of single layer rotor B on single layer rotor C coincides with single layer rotor C, and the projection of single layer rotor C on single layer rotor D coincides with single layer rotor D, that is to say, single layer rotor A, single layer rotor B, single layer rotor C, single layer rotor D all belong to the coincidence relationship, and the misaligned arrangement of the embodiment of the utility model is based on the above coincidence relationship, which rotates single layer rotor A by 3 degrees to the left, rotates single layer rotor B by 6 degrees to the left, rotates single layer rotor C by 9 degrees to the left, and rotates single layer rotor D by 12 degrees to the left, or rotates single layer rotor A by 3 degrees to the left, rotates single layer rotor B by 6 degrees to the left, rotates single layer rotor C by 9 degrees to the left, and rotates single layer rotor D by 6 degrees to the left, or rotates single layer rotor A by 3 degrees to the right, rotates single layer rotor B by 6 degrees to the right, rotates single layer rotor C by 9 degrees to the right, and rotates single layer rotor D by 12 degrees to the right, or rotates single layer rotor A by 3 degrees to the right, rotates single layer rotor B by 6 degrees to the right, rotates single layer rotor C by 9 degrees to the right, and rotates single layer rotor D by 6 degrees to the right, or rotates single layer rotor A by 3 degrees to the right, rotates single layer rotor B by 6 degrees to the right, rotates single layer rotor C by 3 degrees to the right, and rotates single layer rotor D by 6 degrees to the right, so as to realize the non-coincidence of single layer rotor A, single layer rotor B, single layer rotor C and single layer rotor D.

[0050] Of course, the above is only an example to illustrate the misaligned arrangement, and the rotation angle between the adjacent two single layer rotors 10 can be considered according to the actual situation, which is not limited herein.

[0051] In some embodiments, the permanent magnet slots 102 are arranged at the edge of the rotor core 101.

[0052] Further, arranging the permanent magnet slots 102 at the edge of the rotor core 101 has several advantages:

[0053] Optimized magnetic field distribution: By placing the permanent magnet slots 102 at the edge of the rotor core 101, the magnetic field generated by the permanent magnets 30 can be more effectively utilized. This design helps to form a more uniform magnetic field distribution, reducing the unevenness of the magnetic field, thereby improving the efficiency and performance of the motor.

[0054] Improved electromagnetic efficiency: The permanent magnet slots 102 arranged at the edge can more directly interact with the stator windings, improving the conversion efficiency of electromagnetic energy. By optimizing the position of the permanent magnets 30 and the shape of the slots, further reduction of core loss and eddy current loss can be achieved, enhancing the overall efficiency of the motor.

[0055] Enhanced torque output: The permanent magnet slots 102 at the edge of the rotor core 101 can more effectively utilize the force of the magnetic field, thereby enhancing the torque output of the motor. This design helps to improve the load capacity and dynamic response performance of the motor, allowing it to maintain stable operation under various working conditions.

[0056] Simplified manufacturing process: Arranging the permanent magnet slots 102 at the edge of the rotor core 101 can simplify the manufacturing process of the motor. This design makes the installation and positioning of the permanent magnets 30 more convenient, reducing the complexity and cost of the manufacturing process.

[0057] Improved motor reliability: The permanent magnet slots 102 arranged at the edge help to reduce the mechanical and thermal stress on the permanent magnets 30 during operation, thereby improving the service life of the permanent magnets 30 and the reliability of the motor. By optimizing the shape and size of the permanent magnet slots 102, further reduction of the risk of permanent magnet 30 falling off and damage can be achieved, ensuring long-term stable operation of the motor.

[0058] As can be seen from the above, arranging the permanent magnet slots 102 of the multi-layer multi-stage rotor 100 at the edge of the rotor core 101 can optimize the magnetic field distribution, improve the electromagnetic efficiency, enhance the torque output, simplify the manufacturing process, and improve the reliability of the motor. Therefore, it is a better choice to arrange the permanent magnet slots 102 at the edge of the rotor core 101.

[0059] It can be understood that in other embodiments, the permanent magnet slots 102 can also be arranged at other positions of the rotor core 101, which can be designed according to actual conditions and is not limited herein.

[0060] Please refer to Figures 1 to 4In some embodiments, the permanent magnet grooves 102 comprise a plurality of adjacent permanent magnet groove groups 20, the distance between any two adjacent permanent magnet groove groups 20 is the same, each permanent magnet groove group 20 comprises a first groove group 201 and a second groove group 202, the first groove group 201 and the second groove group 202 are arranged in front of and behind each other, and the distance from the first groove group 201 to the center of the rotor core 101 is smaller than the distance from the second groove group 202 to the center of the rotor core 101.

[0061] In this way, the same size of the permanent magnet groove group 20 helps to ensure that the magnetic field strength generated by each permanent magnet 30 is consistent, thereby improving the electromagnetic performance of the motor. The consistent magnetic field strength helps to optimize the torque output and dynamic response performance of the motor. At the same time, the standardized and consistent size of the permanent magnet groove group 20 helps to reduce the mechanical stress and thermal stress that the permanent magnet 30 is subjected to during operation, thereby improving the service life of the permanent magnet 30. In addition, the consistent groove size can also reduce the risk of the permanent magnet 30 falling off and being damaged, thereby enhancing the overall reliability of the motor. Furthermore, if the permanent magnet 30 needs to be repaired or replaced during the operation of the motor, the same groove size can simplify this process, and maintenance personnel can more easily find the appropriate permanent magnet 30 for replacement without worrying about the problem of size mismatch.

[0062] Further, the distance from the first groove group 201 to the center of the rotor core 101 is different from the distance from the second groove group 202 to the center of the rotor core 101. Since the distance of the permanent magnet groove 102 determines the magnetic path space between adjacent permanent magnet grooves 102, if the groove distance is too small, the distance between adjacent permanent magnet grooves 102 is too close, which may cause magnetic path saturation. Magnetic path saturation can reduce the output power and efficiency of the motor, because the saturated magnetic path can no longer effectively carry more magnetic flux. Therefore, changing the distance of the first groove group 201 and the second groove group 202 can effectively avoid the above-mentioned situation, and the structure is simple and easy to implement.

[0063] Please refer to Figure 4 In some embodiments, the first groove group 201 comprises two first grooves 2011 arranged in a figure-eight shape, and the second groove group 202 comprises two second grooves 2021 arranged in a figure-eight shape.

[0064] Of course, in other embodiments, the first groove 2011 and the second groove 2021 can also adopt other shapes, which can be designed according to actual conditions and are not limited herein.

[0065] In some embodiments, the size of the first groove 2011 is larger than the size of the second groove 2021, and the multi-layer multi-stage rotor 100 further comprises a plurality of permanent magnets 30, the permanent magnets 30 comprise first magnets 301 and second magnets 302, the first magnets 301 are installed in the first grooves 2011, and the second magnets 302 are installed in the second grooves 2021.

[0066] As can be seen from the above, the first slot 2011 and the second slot 2021 are different in size, and therefore the first magnet 301 and the second magnet 302 are also different in size. By arranging different sizes of permanent magnets 30 on the rotor core 101, the distribution of the magnetic field can be more flexibly adjusted. This design helps to reduce the unevenness of the magnetic field, improve the stability and uniformity of the magnetic field, and thus improve the efficiency and performance of the motor. In addition, different sizes of permanent magnets 30 can more effectively utilize the force of the magnetic field and produce a stronger electromagnetic interaction with the stator winding. This design helps to optimize the conversion efficiency of electromagnetic energy and reduce energy loss during conversion, thereby improving the overall efficiency of the motor.

[0067] In addition, as can be seen from the above, the size of the permanent magnet 30 directly affects the strength of the magnetic field it generates, and thus affects the torque output of the motor. By arranging different sizes of permanent magnets 30 on the rotor core 101, the torque output can be more accurately controlled to meet the needs of different loads and working conditions.

[0068] In some embodiments, an insulating layer (not shown in the figure) is provided between two adjacent rotor cores 101.

[0069] In the structure of the multi-layer multi-stage rotor 100, each layer of the rotor may have a different potential. If there is no insulating layer to isolate them, electrical short circuits may occur between rotors with different potentials, causing abnormal current flow, damaging the motor structure or causing safety accidents. In addition, during the magnetization process of the multi-layer multi-stage rotor 100, the distance between two adjacent single-layer rotors 10 is very close. In the multi-layer multi-stage rotor 100, if there is no insulating layer between two adjacent layers of rotors, when the rotor rotates in the main magnetic flux, eddy current loss may occur. Eddy current loss can cause energy loss and heating of the motor, reducing the efficiency and service life of the motor. The insulating layer can effectively reduce eddy current loss and improve the performance of the motor. The insulating layer can also ensure that the electromagnetic fields between each layer of rotors are independent of each other and do not interfere with each other. This can ensure the stability of the electromagnetic performance of the motor and improve the efficiency and output power of the motor. In addition, the insulating layer can protect the rotor from mechanical wear and chemical corrosion, improving the reliability and stability of the motor. During long-term operation, the motor may be affected by various environmental factors. The insulating layer can reduce the damage of these factors to the rotor and prolong the service life of the motor.

[0070] Please refer again to Figure 4In some embodiments, each first slot 2011 is provided with a first abutting portion 2012 and a first limiting protrusion 2013, the first abutting portion 2012 and the first limiting protrusion 2013 are respectively arranged at two ends of the first slot 2011, when the first magnet 301 is arranged in the first slot 2011, one end of the first magnet 301 abuts against the first abutting portion 2012, and the other end of the first magnet 301 abuts against the first limiting protrusion 2013; each second slot 2021 is provided with a second abutting portion 2022 and a second limiting protrusion 2023, the second abutting portion 2022 and the second limiting protrusion 2023 are respectively arranged at two ends of the second slot 2021, when the second magnet 302 is arranged in the second slot 2021, one end of the second magnet 302 abuts against the second abutting portion 2022, and the other end of the second magnet 302 abuts against the second limiting protrusion 2023.

[0071] When the first magnet 301 is arranged in the first slot 2011, there is a gap between the first magnet 301 and the first slot 2011, and there is a gap between the second magnet 302 and the second slot 2021.

[0072] Through the arrangement of the gap, during the working process of the multi-layer multi-stage rotor 100, the generation of noise can be reduced, and the overall mass of the multi-layer multi-stage rotor 100 can be reduced, thereby facilitating the working of the motor and improving the working efficiency of the multi-layer multi-stage rotor 100.

[0073] A magnetizing equipment 1000, the magnetizing equipment 1000 comprises:

[0074] A machine body 1002, the magnetizing equipment 1000 is provided with a magnetizing assembly 1001;

[0075] The multi-layer multi-stage rotor 100 of any one of the above, in the case where the multi-layer multi-stage rotor 100 is installed in the magnetizing assembly 1001, the magnetizing assembly 1001 is used to saturate and magnetize the multi-layer multi-stage rotor 100.

[0076] The utility model discloses a kind of magnetic charging equipment 1000 provided in the embodiment, multi-layer multi-stage rotor 100 includes multiple single-layer rotors 10, multiple single-layer rotors 10 are formed into multi-layer multi-stage rotor 100 by the way of stacking to form multi-layer multi-stage rotor 100 in this way, multi-layer multi-stage rotor 100 magnetic circuit is shorter, so it can reduce loss, help to improve the efficiency of motor, and multi-layer multi-stage rotor 100 power density is lower, and magnetic circuit density is shorter, it is advantageous to promote the current output capability of motor to improve the overall performance of multi-layer multi-stage rotor 100.In addition, between two adjacent rotors, it is misaligned arrangement, not one-to-one arrangement, since multiple single-layer rotors 10 are stacked and misaligned arrangement, interlayer current and magnetic field interaction is enhanced, so as to improve the working efficiency and electromagnetic performance of multi-layer multi-stage rotor 100, and in the process of magnetizing multi-layer multi-stage rotor 100, single magnetization can also be realized, and it can also avoid the case that there is more interference between adjacent single-layer rotors 10, it is advantageous to the normal magnetization work of multi-layer multi-stage rotor 100.

[0077] In the description of the present specification, the description referring to the terms "one embodiment", "certain embodiments", "exemplary embodiment", "example", "specific example", or "some examples" 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 utility model. In the present specification, the exemplary 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 one or more embodiments or examples in a suitable manner.

[0078] Although the embodiments of the present utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A multi-layer multi-stage rotor, characterized by, The multi-layer multi-stage rotor comprises a plurality of single-layer rotors which are stacked to form a multi-layer structure and are connected by precise mechanical structure, and the single-layer rotors are arranged in a staggered manner during stacking, each single-layer rotor comprises a rotor core, and a permanent magnet slot is arranged on each rotor core and penetrates the rotor core, each rotor core has the same shape, and adjacent rotor cores are fixedly connected.

2. The multi-layer multi-stage rotor of claim 1, wherein, The staggered arrangement is that the rotor cores of adjacent single-layer rotors are staggered in the circumferential direction or the radial direction.

3. The multi-layer multi-stage rotor of claim 1, wherein, The permanent magnet slot is arranged at the edge of the rotor core and surrounds the rotor core.

4. The multi-layer multi-stage rotor of claim 1, wherein, The permanent magnet slot comprises a plurality of adjacent permanent magnet slot groups, the interval distance between adjacent permanent magnet slot groups is the same, each permanent magnet slot group comprises a first slot group and a second slot group, the first slot group and the second slot group are arranged in front of and behind each other, and the distance from the first slot group to the center of the rotor core is smaller than the distance from the second slot group to the center of the rotor core.

5. The multi-layer multi-stage rotor of claim 4, wherein, The first slot group comprises two first slots which are arranged in a figure-of-eight shape, and the second slot group comprises two second slots which are arranged in a figure-of-eight shape.

6. The multi-layer multi-stage rotor of claim 5, wherein, The size of the first slot is larger than that of the second slot.

7. The multi-layer multi-stage rotor of claim 6, wherein, The multi-layer multi-stage rotor further comprises a plurality of permanent magnets, the permanent magnets comprise first magnets and second magnets, the first magnets are installed in the first slots, and the second magnets are installed in the second slots.

8. The multi-layer multi-stage rotor of claim 1, wherein, An insulating layer is arranged between adjacent rotor cores.

9. The multi-layer multi-stage rotor of claim 7, wherein, Each first slot is provided with a first abutting portion and a first limiting protrusion, the first abutting portion and the first limiting protrusion are arranged at two ends of the first slot respectively, one end of the first magnet abuts against the first abutting portion and the other end of the first magnet abuts against the first limiting protrusion when the first magnet is arranged in the first slot, each second slot is provided with a second abutting portion and a second limiting protrusion, the second abutting portion and the second limiting protrusion are arranged at two ends of the second slot respectively, one end of the second magnet abuts against the second abutting portion and the other end of the second magnet abuts against the second limiting protrusion when the second magnet is arranged in the second slot. When the first magnet is arranged in the first slot, a gap exists between the first magnet and the first slot, and a gap exists between the second magnet and the second slot.

10. A magnetizing apparatus characterized by comprising: The magnetizing equipment comprises: a machine body, and a magnetizing assembly is arranged on the magnetizing equipment; the multi-layer multi-stage rotor according to any one of claims 1-9, when the multi-layer multi-stage rotor is installed on the magnetizing assembly, the magnetizing assembly is used for saturating magnetization of the multi-layer multi-stage rotor.

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