A new type of motor rotor

Abstract

This utility model discloses a novel motor rotor, including a rotor core. Multiple magnetic slots for accommodating magnets are evenly distributed circumferentially on the rotor core. The outer circumferential contour of the rotor core is composed of alternating arc-shaped segments and recessed segments connected end-to-end. Each recessed segment consists of two symmetrically arranged, inwardly recessed stepped structures, forming a slot between the two stepped structures. The stepped structure includes an outer inclined portion, a platform portion, and an inner inclined portion connected sequentially from the outer circumference of the rotor core towards the center. The outer inclined portion and the platform portion have a first preset angle. By optimizing the magnetic circuit structure and external contour design of the rotor core, the magnetic field distribution is more concentrated, reducing magnetic leakage, decreasing the amount of permanent magnets used, saving production costs, and reducing the overall weight of the rotor. This effectively improves the motor's operating efficiency and power density, enhances the motor's overall performance parameters, and strengthens the product's market competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of rotor magnetic circuit structure technology, specifically to a novel motor rotor. Background Technology

[0002] As the core rotating component of a motor, the rotor's technical performance directly determines the motor's efficiency, power density, and operational reliability. Currently, with the increasing demands for energy conservation and environmental protection in the industrial sector, motors are developing towards higher efficiency, smaller size, and higher power density. To adapt to this trend, rotor design has become a key aspect of motor technology innovation, with its core objective being how to optimize the magnetic circuit structure to maximize the utilization of magnetic flux within a limited space, thereby improving the motor's overall performance.

[0003] However, existing permanent magnet motor rotor structures still have significant shortcomings. Commonly used rotor designs often utilize a large number of magnets, leading to higher overall rotor weight and material costs. More importantly, the magnetic circuit optimization in such designs is insufficient, resulting in significant magnetic leakage. This prevents the effective utilization of the magnetic flux generated by the magnets, hindering further improvements in motor efficiency. This increases production costs and limits motor performance, failing to fully meet the market's urgent demand for high-efficiency, compact motors. Therefore, a novel rotor structure design is needed to address these issues. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model proposes a novel motor rotor that can overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows: A new type of motor rotor; The novel motor rotor includes a rotor core, on which multiple magnetic slots for accommodating magnets are uniformly formed along the circumference. The outer circumferential contour of the rotor core is characterized by being composed of multiple alternating arc-shaped segments and recessed segments connected end-to-end. Each recessed segment consists of two symmetrically arranged, inwardly recessed stepped structures, forming a slot between the two stepped structures. The stepped structure includes an outer inclined portion, a platform portion, and an inner inclined portion connected sequentially from the outer circumference of the rotor core towards the center. The outer inclined portion and the platform portion have a first preset angle.

[0006] Furthermore, the outer circle of the rotor core is R19; the number of the plurality of arc segments and recessed segments is eight, and they are evenly distributed circumferentially.

[0007] Furthermore, the first preset angle between the outer inclined surface and the platform portion is 6.4°.

[0008] Furthermore, the included angle between the outer inclined surfaces of the two symmetrically arranged stepped structures is 167.2°.

[0009] Furthermore, the magnetic steel groove includes a wide parallel section of the groove wall and a narrow angled section of the groove wall, and a horizontal distance is formed between the corner of the magnetic steel groove and the adjacent inner inclined section.

[0010] Furthermore, the horizontal distance is 13.7 ± 0.12 mm.

[0011] Furthermore, the angle formed between the wide parallel section of the magnetic steel groove wall and the narrow angle section of the groove wall is 202.5°; the minimum core thickness at the groove opening is 1.2mm.

[0012] Furthermore, the thickness of the parallel section of the wide part of the magnetic steel groove is 7.98±0.12mm, and the closest distance between the platform portions of two adjacent stepped structures is 4.6mm.

[0013] Furthermore, the platform portion has a width of 1.7 mm and a thickness of 0.9 mm.

[0014] Furthermore, the rotor core has an inner hole at its center, and a ring of evenly distributed protrusions around the inner hole, the protrusions being a large semicircle with an arc radius R1.

[0015] The beneficial effects of this utility model are as follows: by optimizing the magnetic circuit structure and external contour design of the rotor core, the magnetic field distribution is more concentrated, significantly reducing magnetic leakage, reducing the amount of permanent magnets used, saving production costs, and reducing the overall weight of the rotor; thereby effectively improving the working efficiency and power density of the motor, improving the comprehensive performance parameters of the motor, and enhancing the product's market competitiveness. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a novel motor rotor according to an embodiment of the present utility model; Figure 2 This is a front view of a novel motor rotor according to an embodiment of the present utility model; Figure 3 This is a partial detail drawing of a novel motor rotor according to an embodiment of the present utility model; In the diagram: 1. Rotor core; 2. Magnet slot; 3. Arc-shaped section; 4. Recessed section; 5. Stepped structure; 51. Outer inclined section; 52. Platform section; 53. Inner inclined section; 6. Slot opening; 7. Inner hole; 8. Protruding structure. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0019] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0020] like Figure 1-3 As shown, a novel motor rotor according to an embodiment of the present invention includes a rotor core 1. The rotor core 1 has a plurality of magnetic slots 2 evenly distributed circumferentially to accommodate magnets. The rotor core 1 is characterized in that its outer circumferential contour is formed by alternating connections of multiple arc-shaped segments 3 and recessed segments 4 connected end-to-end. Each recessed segment 4 consists of two symmetrically arranged and inwardly recessed stepped structures 5, forming a slot 6 between the two stepped structures 5. The stepped structure 5 includes an outer inclined portion 51, a platform portion 52, and an inner inclined portion 53 sequentially connected from the outer circumference of the rotor core 1 towards the center. The outer inclined portion 51 and the platform portion 52 have a first preset included angle α.

[0021] According to an embodiment of the present invention, a novel motor rotor is provided. In a specific embodiment, the outer circle of the rotor core 1 is R19; the number of the plurality of arc segments 3 and recessed segments 4 is eight, and they are evenly distributed circumferentially.

[0022] According to an embodiment of the present invention, in a specific embodiment of a novel motor rotor, the first preset angle α between the outer inclined portion 51 and the platform portion 52 is 6.4°.

[0023] According to an embodiment of the present invention, in a specific embodiment of a novel motor rotor, the included angle β between the outer inclined surfaces 51 of the two symmetrically arranged stepped structures 5 is 167.2°.

[0024] According to an embodiment of the present invention, a novel motor rotor is provided. In a specific embodiment, the magnet slot 2 includes a wide parallel section slot wall and a narrow angled section slot wall. A horizontal distance L1 is formed between the angle of the magnet slot 2 and the adjacent inner inclined section 53.

[0025] According to an embodiment of the present invention, in a specific embodiment of a novel motor rotor, the horizontal distance L1 is 13.7 ± 0.12 mm.

[0026] According to an embodiment of the present invention, in a specific embodiment of a novel motor rotor, the angle formed between the wide parallel section of the magnetic slot 2 and the narrow angle section of the slot wall is 202.5°; the minimum core thickness T1 at the slot opening 6 is 1.2 mm.

[0027] According to an embodiment of the present invention, in a specific embodiment of a novel motor rotor, the thickness B1 of the parallel section of the wide portion of the magnet slot 2 is 7.98±0.12mm, and the closest distance D1 between the platform portions 52 of two adjacent stepped structures 5 is 4.6mm.

[0028] According to an embodiment of the present invention, in a specific embodiment of a novel motor rotor, the width W1 of the platform portion 52 is 1.7 mm and the thickness T2 is 0.9 mm.

[0029] According to an embodiment of the present invention, a novel motor rotor is provided in a specific embodiment, wherein the rotor core 1 has an inner hole 7 at its center, and a ring of evenly distributed protrusions 8 is provided around the inner hole 7, wherein the protrusions 8 are large semicircles with an arc radius R1.

[0030] To facilitate understanding of the above-mentioned technical solutions of this utility model, the following will provide a detailed description of the above-mentioned technical solutions of this utility model through structural principles or specific usage methods.

[0031] In practical use, the novel motor rotor according to this utility model includes a rotor core 1, on which eight magnetic slots 2 for accommodating magnets are evenly distributed circumferentially. The outer circumferential contour of the rotor core 1 is composed of multiple arc-shaped segments 3 and recessed segments 4 connected end to end in alternating connections. Each recessed segment 4 consists of two symmetrically arranged and inwardly recessed stepped structures 5, with a slot 6 formed between the two stepped structures 5.

[0032] The stepped structure 5 includes an outer inclined portion 51, a platform portion 52, and an inner inclined portion 53 connected sequentially from the outer circle of the rotor core 1 towards the center. The outer inclined portion 51 and the platform portion 52 have a first preset included angle α of 6.4°, and the included angle β between the two symmetrically arranged outer inclined portions 51 of the stepped structure 5 is 167.2°.

[0033] The magnetic steel trough 2 includes a wide parallel section of the trough wall and a narrow angled section of the trough wall. The angle formed between the wide parallel section and the narrow angled section is 202.5°. The thickness B1 of the wide parallel section of the magnetic steel trough 2 is 7.98±0.12mm. The horizontal distance L1 between the bend of the magnetic steel trough 2 and the adjacent inner inclined section 53 is 13.7±0.12mm.

[0034] The minimum core thickness T1 at slot 6 is 1.2 mm. The closest distance D1 between the platform portions 52 of two adjacent stepped structures 5 is 4.6 mm, the width W1 of the platform portion 52 is 1.7 mm, and the thickness T2 is 0.9 mm.

[0035] The rotor core 1 has an inner hole 7 at its center, and eight raised structures 8 are evenly distributed around the inner hole 7. The raised structures 8 are large semicircles with an arc radius of R1 and are evenly distributed on the circumference of R7.5.

[0036] The rotor core has an outer radius of R19, an inner diameter of 12mm, an outer diameter of 53.2mm, and a rotor stack height of 28mm.

[0037] In summary, by utilizing the above-mentioned technical solution of this utility model, and by optimizing the magnetic circuit structure and external contour design of the rotor core, the magnetic field distribution becomes more concentrated, significantly reducing magnetic leakage, reducing the amount of permanent magnets used, saving production costs, and reducing the overall weight of the rotor; thereby effectively improving the working efficiency and power density of the motor during operation, improving the comprehensive performance parameters of the motor, and enhancing the product's market competitiveness.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A novel motor rotor, comprising a rotor core (1), wherein a plurality of magnet slots (2) for accommodating magnets are uniformly formed along the circumference of the rotor core (1), characterized in that, The outer circumferential contour of the rotor core (1) is composed of multiple arc-shaped segments (3) and recessed segments (4) connected end to end. Each recessed segment (4) is composed of two symmetrically arranged and inwardly recessed stepped structures (5), and a slot (6) is formed between the two stepped structures (5). The stepped structure (5) includes an outer inclined part (51), a platform part (52) and an inner inclined part (53) connected sequentially from the outer circle of the rotor core (1) towards the center. The outer inclined part (51) and the platform part (52) have a first preset included angle (α).

2. The novel motor rotor according to claim 1, characterized in that, The outer circle of the rotor core (1) is R19; the number of the plurality of arc segments (3) and recessed segments (4) is eight, and they are evenly distributed circumferentially.

3. A novel motor rotor according to claim 2, characterized in that, The first preset angle (α) between the outer inclined surface (51) and the platform portion (52) is 6.4°.

4. A novel motor rotor according to claim 1, characterized in that, The included angle (β) between the outer inclined surfaces (51) of the two symmetrically arranged stepped structures (5) is 167.2°.

5. A novel motor rotor according to claim 1, characterized in that, The magnetic steel groove (2) includes a wide parallel section groove wall and a narrow angled section groove wall. The corner of the magnetic steel groove (2) forms a horizontal distance (L1) with the adjacent inner inclined section (53).

6. A novel motor rotor according to claim 5, characterized in that, The horizontal distance (L1) is 13.7 ± 0.12 mm.

7. A novel motor rotor according to claim 5, characterized in that, The angle formed between the wide parallel section of the magnetic steel groove (2) and the narrow angle section of the groove is 202.5°; the minimum core thickness (T1) at the groove opening (6) is 1.2 mm.

8. A novel motor rotor according to claim 1, characterized in that, The thickness (B1) of the parallel section of the wide part of the magnetic steel groove (2) is 7.98±0.12mm, and the closest distance (D1) between the platform parts (52) of two adjacent stepped structures (5) is 4.6mm.

9. A novel motor rotor according to claim 1, characterized in that, The platform section (52) has a width (W1) of 1.7 mm and a thickness (T2) of 0.9 mm.

10. A novel motor rotor according to claim 1, characterized in that, The rotor core (1) has an inner hole (7) at its center, and a ring of evenly distributed protrusions (8) is provided around the inner hole (7). The protrusions (8) are large semicircles with an arc radius R1.

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