Motor rotor, motor with same and vehicle

Abstract

The utility model provides a motor rotor, a motor with the motor rotor and a vehicle, and the motor rotor comprises a rotor frame which is provided with installation holes arranged along the circumferential direction of the motor rotor; the magnetic units are arranged in the mounting holes, at least one magnetic unit comprises a plurality of magnets, and the magnets are sequentially arranged and connected. According to the motor rotor provided by the utility model, the plurality of magnets are sequentially arranged and connected to form the magnetic unit, and the magnetic unit is arranged in the mounting hole of the rotor frame, so that the temperature rise of the magnetic unit can be reduced, the operation efficiency of the rotor can be ensured, and the energy consumption of the rotor can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor manufacturing, in particular to a motor rotor and a motor having the same. Background Art

[0002] In the existing motor rotor in the solution, the magnetic steel structure used in the motor rotor is mostly integral. Since the eddy current loss of the magnet has a direct relationship with the magnet size, the larger the magnet size, the more obvious the eddy current effect, the greater the eddy current loss generated, and the more serious the heating, which is not conducive to the operating efficiency of the motor. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a motor rotor which can ensure the operating efficiency of the motor.

[0004] The utility model also provides a motor having the above-mentioned motor rotor.

[0005] The utility model also provides a vehicle having the above-mentioned motor.

[0006] The motor rotor according to the embodiment of the utility model includes: a rotor frame having mounting holes arranged along the circumferential direction of the motor rotor; and a magnetic unit disposed in the mounting holes, at least one of the magnetic units including a plurality of magnets arranged and connected in sequence.

[0007] According to the motor rotor of the utility model, by arranging and connecting a plurality of magnets in sequence to form a magnetic unit and disposing the magnetic unit in the mounting hole of the rotor frame, the temperature rise of the magnetic unit can be reduced, thereby ensuring the operating efficiency of the rotor and saving the rotor energy consumption.

[0008] According to some embodiments of the utility model, a plurality of the magnets are arranged along the width direction of the magnetic unit; and / or, a plurality of the magnets are stacked along the thickness direction of the magnetic unit.

[0009] According to some embodiments of the utility model, at least some of the plurality of magnets are adhesively connected.

[0010] According to some alternative embodiments of the utility model, at least some of the plurality of magnets are adhesively connected by structural adhesive.

[0011] According to some embodiments of the utility model, in the arrangement direction of the plurality of magnets, the magnetic induction intensity of the magnets at both ends of the magnetic unit is greater than that of the remaining magnets.

[0012] According to some embodiments of the present utility model, the number of the mounting holes is multiple, the multiple mounting holes are arranged at intervals, and each mounting hole is provided with the magnetic unit.

[0013] According to some alternative embodiments of the present utility model, the multiple mounting holes form at least one mounting group, the mounting group is composed of multiple mounting holes adjacent to each other in the circumferential direction of the motor rotor, and the multiple mounting holes of the mounting group are symmetrically arranged with respect to the radial direction of the motor rotor.

[0014] According to some alternative embodiments of the present utility model, the multiple mounting holes of the mounting group are arranged to form at least one V-shaped structure opening towards the outer periphery of the rotor frame.

[0015] According to some embodiments of the present utility model, multiple magnetic units are arranged in sequence along the axial direction of the motor rotor in the mounting hole.

[0016] According to some embodiments of the present utility model, the rotor frame is provided with weight-reducing holes.

[0017] The motor according to the embodiment of the second aspect of the present utility model includes the motor rotor of the first aspect of the present utility model.

[0018] For the motor according to the present utility model, by arranging the motor rotor of the above-mentioned first aspect embodiment, arranging multiple magnets in sequence and connecting them to form a magnetic unit, and arranging the magnetic unit in the mounting hole of the rotor frame, the temperature rise of the magnetic unit can be reduced, thereby ensuring the operation efficiency of the rotor and saving the energy consumption of the rotor.

[0019] The vehicle according to the embodiment of the third aspect of the present utility model includes the motor of the second aspect of the present utility model.

[0020] For the vehicle according to the present utility model, by arranging the motor of the above-mentioned second aspect embodiment, arranging the motor rotor of the above-mentioned first aspect on the motor, arranging multiple magnets in sequence and connecting them to form a magnetic unit, and arranging the magnetic unit in the mounting hole of the rotor frame, the temperature rise of the magnetic unit can be reduced, thereby ensuring the operation efficiency of the rotor and saving the energy consumption of the rotor.

[0021] The additional aspects and advantages of the present utility model will be partly given in the following description, partly become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of a motor provided by an embodiment of the present utility model;

[0023] Figure 2 It is a schematic diagram of a motor rotor provided by an embodiment of the present utility model;

[0024] Figure 3 is Figure 2 a partial enlarged view of part A in

[0025] Figure 4 is Figure 3 a schematic diagram of the magnetic unit shown in

[0026] Figure 5 is Figure 3 a schematic diagram of the magnetic unit shown in

[0027] Figure 6 a schematic diagram of the motor rotor provided by another embodiment of the present utility model, in which a plurality of magnets are arranged along the thickness direction of the magnetic unit;

[0028] Figure 7 is Figure 6 a schematic diagram of the magnetic unit shown in

[0029] Figure 8 is Figure 6 a schematic diagram of the magnetic unit shown in

[0030] Figure 9 a graph showing the relationship between the number of segments of a plurality of magnets and eddy current loss;

[0031] Figure 10 a comparison graph of the steady-state temperatures of the segmented magnetic unit and the non-segmented magnetic unit.

[0032] Reference numerals:

[0033] 100, motor rotor;

[0034] 10, rotor frame; 11, mounting group; 111, mounting hole; 12, weight reduction hole;

[0035] 20, magnetic unit; 21, magnet;

[0036] 200, stator;

[0037] 1000, motor. Detailed implementation manners

[0038] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0039] The following refers to the attached Figures 1-10 to describe the motor rotor 100 according to an embodiment of the present invention.

[0040] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 6 , the motor rotor 100 according to an embodiment of the present invention includes: a rotor frame 10 and a plurality of magnetic units 20.

[0041] Specifically, the rotor frame 10 has mounting holes 111 arranged along the circumferential direction of the motor rotor 100; the magnetic units 20 are arranged in the mounting grooves, and at least one magnetic unit 20 includes a plurality of magnets 21, that is to say, the magnetic unit 20 can include two, three or four or more magnets 21, and the plurality of magnets 21 are arranged in sequence and connected.

[0042] It should be noted that a component that can maintain its magnetism for a long time is called a magnet 21. Preferably, the magnet 21 is a magnetic steel, which can ensure the magnetic induction intensity of the magnet 21, and thus can ensure the magnetic induction intensity of the magnet 21.

[0043] For the motor rotor 100 of the present invention, by arranging a plurality of magnets 21 in sequence and connecting them to form a magnetic unit 20, and arranging the magnetic unit 20 in the mounting hole 111 of the rotor frame 10, the size of a single magnet 21 can be reduced. Compared with the prior art in which the magnetic unit 20 is set as a whole, resulting in obvious temperature rise problems of the magnetic unit 20, the magnetic unit 20 of the present application can effectively control the temperature rise of the magnetic unit 20, reduce the eddy current loss of the magnetic unit 20, thereby ensuring the operation efficiency of the rotor, saving the rotor energy consumption, and further ensuring the operation efficiency of the motor 1000 and improving the use safety. At the same time, even when the motor 1000 operates under various composite working conditions, such as self-heating, boost charging and high-speed operation of the motor 1000, etc., it will not cause the magnetic unit 20 to be overheated, which can effectively prevent the magnetic unit 20 from demagnetizing due to high temperature, thereby ensuring the service life of the magnetic unit 20, and further ensuring the service life of the motor 1000.

[0044] Furthermore, by setting the magnetic unit 20 as a plurality of magnets 21, the assembly of the magnetic unit 20 can be facilitated, the assembly efficiency can be improved, and at the same time, the design freedom of the magnetic unit 20 can be increased, and the mold opening cost can be saved.

[0045] For the motor rotor 100 according to an embodiment of the present invention, by arranging a plurality of magnets 21 in sequence and connecting them to form a magnetic unit 20, and arranging the magnetic unit 20 in the mounting hole 111 of the rotor frame 10, the temperature rise of the magnetic unit 20 can be reduced, thereby ensuring the operation efficiency of the rotor and saving the rotor energy consumption.

[0046] According to some embodiments of the present invention, referring toFigure 3 and Figure 4 Multiple magnets 21 are arranged in the width direction of the magnetic unit 20. Thus, this arrangement form can facilitate the bonding of multiple magnets 21, thereby improving the assembly efficiency of the magnets 21. At the same time, the structure of the magnets 21 is simple and convenient for processing, so the processing efficiency can be improved and the production time can be saved.

[0047] For example, as shown in Figure 3 and Figure 4 , the magnet 21 is a rectangular column extending along the axial direction of the motor rotor 100, and multiple magnets 21 are arranged in the Figure 4 X direction in the figure, where X in the figure is the width direction of the magnet 21. Preferably, when the size of the magnet 21 is less than or equal to 3 mm, the eddy current loss of the magnet 21 can be significantly reduced.

[0048] Furthermore, as shown in Figure 6 and Figure 7 , multiple magnets 21 are arranged in a stacked manner in the thickness direction of the magnetic unit 20. Thus, this arrangement form can facilitate the bonding of multiple magnets 21, thereby improving the assembly efficiency of the magnets 21. At the same time, the structure of the magnets 21 is simple and convenient for processing, so the processing efficiency can be improved and the production time can be saved.

[0049] For example, as shown in Figure 6 and Figure 7 , the magnet 21 is a rectangular plate extending along the axial direction of the motor rotor 100, and multiple magnets 21 are arranged in the Figure 7 Y direction in the figure, where Y in the figure is the thickness direction of the magnet 21. Preferably, the magnet 21 can be in the structure of a triangle, a square or a parallelogram, etc., which can facilitate the processing of the magnet 21. At the same time, when the thickness dimension of the magnet 21 is less than or equal to 1.5 mm, the eddy current loss of the magnet 21 decreases significantly, so the temperature rise of the magnet 21 can be effectively reduced.

[0050] As shown in Figure 9 , Figure 9 the horizontal axis in Figure 9 is the number of segments, and the vertical axis in

[0051] As shown in Figure 10 , Figure 10 the vertical axis in Figure 10 is the steady-state temperature value, the left side in Figure 10On the right side of the figure is the steady-state temperature of the segmented magnet 21, which can be found from Figure 10 that the steady-state temperature of the segmented magnet 21 is lower than that of the non-segmented magnet 21. Therefore, segmenting the magnet 21 into multiple magnets 21 can effectively reduce the steady-state temperature of the magnet 21, thereby ensuring the service life of the motor 1000.

[0052] According to some embodiments of the present invention, referring to Figure 3 and Figure 6 , at least some of the multiple magnets 21 are adhesively connected, that is to say, some of the multiple magnets 21 can be adhesively connected, or all of the multiple magnets 21 can be adhesively connected. Thus, the adhesive connection form has a simple structure, low cost, is convenient for batch use, and at the same time, is convenient for splicing and assembling, thereby improving the assembly efficiency. At the same time, the number of magnets 21 can be adhesively connected according to actual needs, thereby improving the versatility of the magnetic unit 20.

[0053] According to some alternative embodiments of the present invention, referring to Figure 3 and Figure 6 , at least some of the multiple magnets 21 are adhesively connected by structural adhesive. Thus, the structural adhesive can ensure the adhesive effect between the multiple magnets 21, thereby effectively preventing the separation of the magnets 21.

[0054] Preferably, the structural adhesive is a high-temperature resistant and non-conductive magnetic steel adhesive, which can prevent the structural adhesive from losing its viscosity after high temperature, thereby ensuring the adhesive reliability of the structural adhesive. At the same time, it can also prevent the short circuit between the magnet 21 and other structures of the motor 1000, thereby ensuring the safe use of the motor 1000.

[0055] According to some embodiments of the present invention, referring to Figure 5 and Figure 8 , in the arrangement direction of the multiple magnets 21, the magnetic induction intensity of the magnets 21 at both ends of the magnet 21 is greater than that of the remaining magnets 21. Thus, by forming the magnet 21 with magnets 21 of different intensities, the temperature rise of the magnet 21 can be further improved, thereby effectively preventing the magnet 21 from being demagnetized at high temperature. Furthermore, the service life of the magnet 21 can be ensured. At the same time, this setting has a reasonable structure and can avoid irreversible demagnetization caused by the armature direct-axis magnetomotive force.

[0056] Through demagnetization simulation calculation, when the whole magnet is bonded by magnetic steel segments of different materials, the magnetic material with weaker magnetic properties is set in the middle section to avoid irreversible demagnetization caused by the armature direct-axis magnetomotive force. Therefore, this design is reasonable and can further prevent the magnet 21 from being demagnetized.

[0057] Preferably, the material of the magnet 21 can be a permanent magnet material such as sintered neodymium iron boron, ferrite, samarium cobalt, etc., and a splicing combination of permanent magnet materials of the same material but different grades.

[0058] According to some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 6 , the number of the mounting holes 111 is multiple, that is to say, the number of the mounting holes 111 can be two, three or four or more. The multiple mounting holes 111 are arranged at intervals, and a magnetic unit 20 is arranged in each mounting hole 111. Thus, a plurality of magnets 21 can be arranged in the multiple mounting holes 111, so as to ensure the magnetic induction intensity of each mounting area 101, and further ensure the operating power of the motor 1000.

[0059] According to some alternative embodiments of the present invention, referring to Figure 2 and Figure 3 , the multiple mounting holes 111 form at least one mounting group 11. The mounting group 11 is composed of a plurality of mounting holes 111 adjacent to each other in the circumferential direction of the motor rotor. The multiple mounting holes 111 of the mounting group 11 are arranged in a V shape opening towards the outer periphery of the rotor frame 10. In the direction from the outside to the inside in the radial direction of the motor rotor 100, the two mounting holes 111 of the mounting group 11 are symmetrically arranged with respect to the radial direction of the motor rotor 100.

[0060] In this way, the arrangement form of the multiple mounting groups 11 arranged at intervals has a reasonable structure, is convenient for arrangement, can also ensure the magnetic induction intensity of the mounting group 11, and at the same time, can save the occupied space of the mounting holes 111 in the radial direction of the motor rotor 100. Moreover, a single mounting group 11 forms a V-shaped structure. The V-shaped structure design allows the magnets 21 to be arranged at a specific angle and sequence, so as to more effectively utilize the space, increase the magnetic flux path, and further improve the magnetic flux density and output torque of the motor 1000.

[0061] According to some alternative embodiments of the present invention, referring to Figure 2 and Figure 3 , the multiple mounting holes 111 of the mounting group 11 are arranged to form at least one V-shaped structure opening towards the outer periphery of the rotor frame 10, that is to say, the multiple mounting holes 111 of the mounting group 11 can be arranged to form one, two or three or more V-shaped structures opening towards the outer periphery of the rotor frame 10.

[0062] Specifically, the installation group 11 is composed of four installation holes 111. Two of the four installation holes 111 are first installation holes and the other two are second installation holes. Among them, the two first installation holes are symmetrically arranged with respect to the radial direction of the motor rotor 100, and are arranged side by side in a V shape opening towards the outer peripheral edge of the rotor frame 10. The two second installation holes are symmetrically arranged with respect to the radial direction of the motor rotor 100, and are arranged side by side in a V shape opening towards the outer peripheral edge of the rotor frame 10, and the two second installation holes are arranged on one side of the two first installation holes towards the outer peripheral edge of the rotor frame 10.

[0063] In this way, by setting the installation group 11 into two V-shaped structures, the magnetic induction intensity of the installation group 11 can be further ensured, thereby ensuring the operating power of the motor 1000. At the same time, better mechanical fixation can also be provided to prevent the magnet 21 from shifting or falling off during high-speed rotation or under external impact, increasing the stability and reliability of the motor rotor 100. In addition, the air flow channel inside the motor rotor 100 can be improved, which helps to dissipate heat, effectively prevent the temperature rise of the motor 1000, and thus can effectively extend the life of the motor 1000.

[0064] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , a plurality of magnetic units 21 are arranged in sequence along the axial direction of the motor rotor 100 in the installation hole 111. The magnetic unit 21 includes a plurality of magnetic segments. That is to say, the magnetic unit 21 can include two, three or four or more magnetic segments, and the plurality of magnetic segments are arranged along the axial direction of the motor rotor 100. Thus, by segmenting the magnetic unit 21, the temperature rise of the magnet 21 can be further reduced, thereby further ensuring the efficiency of the motor 1000.

[0065] It should be noted that through simulation calculations, it can be shown that after adopting the segmented magnet 21 structure, the efficiency of the motor 1000 can be effectively increased by about 0.41%, and at the same time, the steady-state temperature of the segmented permanent magnet is 27°C lower than the steady-state temperature of the non-segmented magnet 21.

[0066] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , the rotor frame 10 is provided with weight-reducing holes 12, and the weight-reducing holes 12 penetrate through the rotor frame 10 along the axial direction of the rotor frame 10. Thus, the weight of the rotor frame 10 can be reduced, which is convenient for the assembly and transportation of the rotor frame 10. At the same time, the material consumption of the rotor frame 10 can be reduced, thereby reducing the production cost.

[0067] For example, as Figure 1 and Figure 2 shown, the rotor frame 10 is provided with eight weight-reducing holes 12, and the eight weight-reducing holes 12 are arranged at intervals along the circumferential direction of the rotor frame 10.

[0068] According to the motor 1000 of the second aspect embodiment of the present utility model, referring to Figure 1 , it includes the motor rotor 100 of the first aspect of this embodiment.

[0069] According to the motor 1000 of the embodiment of the present utility model, by providing the motor rotor 100 of the first aspect embodiment above, by arranging and connecting a plurality of magnets 21 in sequence to form a magnetic unit 20, and arranging the magnetic unit 20 in the mounting hole 111 of the rotor frame 10, the temperature rise of the magnetic unit 20 can be reduced, thereby ensuring the operation efficiency of the rotor and saving the rotor energy consumption.

[0070] According to the vehicle of the third aspect embodiment of the present utility model, referring to Figure 1 , it includes the motor 1000 of the first aspect of this embodiment.

[0071] According to the vehicle of the embodiment of the present utility model, by providing the motor 1000 of the second aspect embodiment above, providing the motor rotor 100 of the first aspect embodiment on the motor, arranging and connecting a plurality of magnets 21 in sequence on the motor rotor 100 to form a magnetic unit 20, and arranging the magnetic unit 20 in the mounting hole 111 of the rotor frame 10, the temperature rise of the magnetic unit 20 can be reduced, thereby ensuring the operation efficiency of the rotor and saving the rotor energy consumption.

[0072] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0073] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0074] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "coupling", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. 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 this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0076] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, 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 motor rotor, characterized in that: include: A rotor frame, wherein the rotor frame has mounting holes arranged along the circumference of the motor rotor; as well as A magnetic unit, wherein the magnetic unit is disposed in the mounting hole, and at least one of the magnetic units comprises a plurality of magnets, and the plurality of magnets are sequentially arranged and connected; The plurality of magnets are arranged along a width direction of the magnetic unit, and / or the plurality of magnets are stacked along a thickness direction of the magnetic unit.

2. The motor rotor according to claim 1, characterized in that: At least some of the plurality of magnets are bonded together.

3. The motor rotor according to claim 2, characterized in that: At least some of the plurality of magnets are connected by bonding with structural adhesive.

4. The motor rotor according to claim 1, characterized in that: In the arrangement direction of the plurality of magnets, the magnetic induction intensity of the magnets located at two ends of the magnetic unit is greater than the magnetic induction intensity of the remaining magnets.

5. The motor rotor according to claim 1, characterized in that: There are multiple mounting holes, which are arranged at intervals, and each mounting hole is provided with the magnetic unit.

6. The motor rotor according to claim 5, characterized in that: The plurality of mounting holes constitute at least one mounting group, wherein the mounting group is composed of a plurality of mounting holes adjacent to each other in the circumferential direction of the motor rotor, and the plurality of mounting holes in the mounting group are arranged symmetrically with respect to the radial direction of the motor rotor.

7. The motor rotor according to claim 6, characterized in that: The plurality of mounting holes of the mounting group are arranged to form at least one V-shaped structure opening toward the outer periphery of the rotor frame.

8. The motor rotor according to claim 1, characterized in that: A plurality of magnetic units are arranged in sequence along the axial direction of the motor rotor.

9. The motor rotor according to claim 1, characterized in that: The rotor frame is provided with weight-reducing holes.

10. A motor, characterized in that: The invention comprises the motor rotor according to any one of claims 1 to 9.

11. A vehicle, characterized in that: The motor comprising the motor described in claim 10.

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