Motor rotor structure

Abstract

The utility model discloses a motor rotor structure, which belongs to the technical field of motor rotors, and comprises a rotor body, the rotor body is provided with first slots and second slots, the first slots form a group in pairs, the number of the first slots is multiple groups, and the first slots are distributed along the circumferential direction of the rotor body at intervals. The second slots correspond to the first slots in position and are distributed along the circumferential direction of the rotor body at intervals; the first magnetic steel is inserted into the first open slot, and the end part of the first magnetic steel protrudes out of the surface of the rotor body; and the second magnetic steel is inserted into the second open slot, and the end part of the second magnetic steel protrudes out of the surface of the rotor body. According to the utility model, the first magnetic steel and the second magnetic steel are embedded into the rotor body, and the first magnetic steel and the second magnetic steel are longer than the rotor body, so that the electromagnetic performance of the motor and the internal heat dissipation performance of the motor can be effectively improved, and the motor can effectively reduce the temperature rise of the motor while reducing the torque pulsation.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor rotors, and particularly relates to a motor rotor structure. Background Art

[0002] The permanent magnet assisted synchronous reluctance motor (PMaSynRM) is a type of motor that combines the advantages of permanent magnet motors and synchronous reluctance motors. In recent years, due to its high power density, high efficiency, high cost performance, and wide speed regulation range, it has received extensive attention and research in the fields of household appliances, electric vehicles, and industrial motors. By introducing permanent magnets on the basis of synchronous reluctance motors, this type of motor can not only provide a high power factor and strong overload capacity but also maintain high efficiency and excellent control performance.

[0003] The existing permanent magnet assisted synchronous reluctance motors have relatively large torque ripples. Usually, an iron core is used as the motor rotor, and there are many slots inside the iron core, resulting in a relatively complex structure of the motor rotor and making it difficult to optimize the design of torque ripple. Excessive torque ripple will cause problems such as large vibration and high noise in the motor. Therefore, how to optimize the torque ripple of the motor is an urgent problem to be solved in the existing technology. Summary of the Utility Model

[0004] The utility model overcomes the deficiencies of the existing technology and provides a motor rotor structure to solve the problems existing in the existing technology.

[0005] To achieve the above object, the technical solution adopted by the utility model is: a motor rotor structure, including

[0006] a rotor body, on which a first slot and a second slot are provided. The first slots are in pairs, and the number of the first slots is multiple groups and are circumferentially spaced along the rotor body. The second slot corresponds to the position of the first slot and is circumferentially spaced along the rotor body;

[0007] a first permanent magnet, which is inserted into the first slot and its end protrudes from the surface of the rotor body;

[0008] a second permanent magnet, which is inserted into the second slot and its end protrudes from the surface of the rotor body.

[0009] In a preferred embodiment of the utility model, each group of the first slots forms a non-connected V-shaped slot, and the second slot is a connected V-shaped slot.

[0010] In a preferred embodiment of the utility model, the V-shaped slots formed by the first slots and the V-shaped slots formed by the second slots are concentrically arranged, and the V-shaped slots formed by the second slots are located within the V-shaped slots formed by the first slots.

[0011] In a preferred embodiment of the present utility model, the grooving angle of the V-shaped groove formed by the first grooving is 30-40°, and the grooving angle of the V-shaped groove formed by the second grooving is 30-40°.

[0012] In a preferred embodiment of the present utility model, both the first magnet and the second magnet are ferrite.

[0013] In a preferred embodiment of the present utility model, the number of stages of the rotor body is ten.

[0014] In a preferred embodiment of the present utility model, both the first grooving and the second grooving are through grooves to penetrate the first magnet and the second magnet through the rotor body.

[0015] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0016] The motor rotor structure of the present utility model adopts the first magnet and the second magnet embedded in the rotor body, and the first magnet and the second magnet are longer than the rotor body. Therefore, it can effectively improve the electromagnetic performance of the motor and enhance the internal heat dissipation performance of the motor, so that the motor can effectively reduce the temperature rise of the motor while reducing the torque ripple, so as to improve the performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0018] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present utility model;

[0019] Figure 2 It is a top view of the overall structure of a preferred embodiment of the present utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the rotor body of a preferred embodiment of the present utility model;

[0021] In the figure: 10, rotor body; 11, first grooving; 12, second grooving; 20, first magnet; 30, second magnet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will disclose multiple embodiments of the present utility model in the form of diagrams. For the sake of clarity, many physical details will be described in the following narrative. However, it should be understood that these physical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these physical details are unnecessary. In addition, for the sake of simplifying the diagrams, some well-known and commonly used structures and components will be shown in a simple schematic manner in the diagrams.

[0023] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0024] This embodiment provides a motor rotor structure. In this motor rotor structure, a first magnet 20 and a second magnet 30 are embedded in a rotor body 10, and the first magnet 20 and the second magnet 30 are longer than the rotor body 10. Therefore, it can effectively improve the electromagnetic performance of the motor and enhance the internal heat dissipation performance of the motor, enabling the motor to effectively reduce the temperature rise while reducing the torque ripple, so as to improve the performance of the motor.

[0025] Combined with Figures 1 to 3 As shown, the motor rotor structure of this embodiment includes a rotor body 10, a first magnet 20, and a second magnet 30. The number of poles of the rotor body 10 in this embodiment is ten. Both the first magnet 20 and the second magnet 30 are ferrite. After the first magnet 20 and the second magnet 30 are embedded in the rotor body 10, the electromagnetic performance of the motor can be effectively improved.

[0026] Refer to Figure 1 And Figure 3 As shown, the rotor body 10 is provided with a first slot 11 and a second slot 12. The first slots 11 are grouped in pairs, and the number of the first slots 11 is multiple groups and is circumferentially spaced along the rotor body 10. The second slots 12 correspond to the positions of the first slots 11 and are circumferentially spaced along the rotor body 10. The first slots 11 can embed the first magnet 20 into the rotor body 10, and the second slots 12 can embed the second magnet 30 into the rotor body 10. The first magnet 20 and the second magnet 30 are equally spaced on the rotor body 10, thereby effectively improving the electromagnetic performance of the motor.

[0027] In this embodiment, each group of first slots 11 form non-connected V-shaped slots, and the second slots 12 are connected V-shaped slots. The V-shaped slots formed by the first slots 11 and the V-shaped slots formed by the second slots 12 are concentrically arranged. The V-shaped slots formed by the second slots 12 are located within the V-shaped slots formed by the first slots 11. After the first magnet 20 is embedded in the V-shaped slots formed by the first slots 11, the first magnet 20 forms a corresponding V-shaped structure, and after the second magnet 30 is embedded in the V-shaped slots formed by the second slots 12, the second magnet 30 forms a corresponding V-shaped structure.

[0028] Specifically, the slotting angle of the V-shaped slots formed by the first slots 11 is 30 - 40°, and the slotting angle of the V-shaped slots formed by the second slots 12 is 30 - 40°. Both the first slots 11 and the second slots 12 are through slots to penetrate the rotor body 10 with the first magnet 20 and the second magnet 30, thereby ensuring that the first magnet 20 and the second magnet 30 protrude from the rotor body 10.

[0029] Combined Figure 1 with Figure 2 As shown, the first magnet 20 is inserted into the first slots 11, and the end portion protrudes from the surface of the rotor body 10. The second magnet 30 is inserted into the second slots 12, and the end portion protrudes from the surface of the rotor body 10. The first magnet 20 and the second magnet 30 in this embodiment are both ferrite. The first magnet 20 and the second magnet 30 protruding from the surface of the rotor body 10 are longer than the rotor body 10. Therefore, the electromagnetic performance of the motor can be effectively improved and the internal heat dissipation performance of the motor can be enhanced, enabling the motor to effectively reduce the temperature rise while reducing the torque ripple, so as to improve the performance of the motor.

[0030] All in all, the motor rotor structure of this embodiment adopts the first magnet 20 and the second magnet 30 embedded in the rotor body 10, and the first magnet 20 and the second magnet 30 are longer than the rotor body 10. Therefore, the electromagnetic performance of the motor can be effectively improved and the internal heat dissipation performance of the motor can be enhanced, enabling the motor to effectively reduce the temperature rise while reducing the torque ripple, so as to improve the performance of the motor.

[0031] Although the present utility model has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the present utility model. That is to say, the methods, systems, devices, etc. discussed above are all examples. Various configurations can be appropriately omitted, replaced or various processes or components can be added. For example, in an alternative configuration, the method can be executed in an order different from the described order, and / or various stages can be added, omitted and / or combined. Moreover, the features described with respect to certain configurations can be combined in various other configurations. Different aspects and elements of the configuration can be combined in a similar manner. In addition, with the development of technology, many elements are only examples and do not limit the scope of the present disclosure or the claims.

[0032] Specific details are given in the specification to provide a thorough understanding of the exemplary configurations including the implementation. However, the configurations can be practiced without these specific details. For example, well-known circuits, processes, algorithms, structures and technologies have been shown without unnecessary details to avoid obscuring the configurations. The description only provides exemplary configurations and does not limit the scope, applicability or configuration of the claims. On the contrary, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described technologies. Various changes can be made to the functions and arrangements of the elements without departing from the spirit or scope of the present disclosure.

[0033] In addition, although each operation can be described as a sequential process, many operations can be performed in parallel or simultaneously. Additionally, the order of the operations can be rearranged. A process may have other steps. Moreover, examples of the method can be implemented by hardware, software, firmware, middleware, code, hardware description language or any combination thereof. When implemented in software, firmware, middleware or code, the program code or code segments for performing the necessary tasks can be stored in a non-transitory computer-readable medium such as a storage medium and executed by a processor to perform the described tasks.

[0034] In summary, it is intended that the above detailed description be considered illustrative rather than restrictive, and it should be understood that the claims (including all equivalents) are intended to define the spirit and scope of the present utility model. The above embodiments should be understood to be only for illustrating the present utility model and not for limiting the protection scope of the present utility model. After reading the content recorded in the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent changes and modifications also fall within the scope defined by the claims of the present utility model.

Claims

1. A motor rotor structure, characterized in that, including a rotor body (10), on which a first slot (11) and a second slot (12) are provided. The first slots (11) are grouped in pairs, and the number of the first slots (11) is multiple groups which are circumferentially spaced along the rotor body (10). The second slot (12) corresponds to the position of the first slot (11) and is circumferentially spaced along the rotor body (10); a first magnet (20), which is inserted into the first slot (11) and has an end protruding from the surface of the rotor body (10); a second magnet (30), which is inserted into the second slot (12) and has an end protruding from the surface of the rotor body (10).

2. The structure of a motor rotor according to claim 1, characterized in that, Each group of the first slots (11) forms a non-connected V-shaped slot, and the second slot (12) is a connected V-shaped slot.

3. A motor rotor structure according to claim 1 or 2, characterized in that, The V-shaped slot formed by the first slots (11) and the V-shaped slot formed by the second slot (12) are concentrically arranged, and the V-shaped slot formed by the second slot (12) is located within the V-shaped slot formed by the first slots (11).

4. A motor rotor structure according to claim 1, characterized in that, The slotting angle of the V-shaped slot formed by the first slots (11) is 30 - 40°, and the slotting angle of the V-shaped slot formed by the second slot (12) is 30 - 40°.

5. A motor rotor structure according to claim 1, characterized in that, Both the first magnet (20) and the second magnet (30) are ferrite.

6. A motor rotor structure according to claim 1, characterized in that The number of stages of the rotor body (10) is ten stages.

7. A motor rotor structure according to claim 1, characterized in that, Both the first slot (11) and the second slot (12) are through slots to penetrate the first magnet (20) and the second magnet (30) through the rotor body (10).

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