A rotor lamination, rotor core, rotor, motor of a reluctance motor

Abstract

This utility model relates to the field of motor technology, specifically to a rotor lamination, rotor core, rotor, and motor for a reluctance motor. The lamination includes a lamination body with several salient pole structures evenly distributed circumferentially. Each salient pole structure consists of several V-shaped magnet mounting units, including a left magnet mounting slot and a right magnet mounting slot. The left and right magnet mounting slots are mirror images of each other and are V-shaped on the lamination body. The apex of each magnet mounting unit points towards the center of the rotor lamination. The technical solution of this utility model directly enhances the quadrature-axis magnetic flux by setting multiple V-shaped magnet mounting units in the salient pole structure of the rotor lamination, thereby increasing the difference in inductance between the quadrature and direct axes, improving the reluctance torque, optimizing the magnetic field path, and enhancing the reluctance torque of the reluctance motor. The V-shaped structure creates a "magnetic flux focusing" effect, concentrating the magnetic flux of the permanent magnet in the air gap region, reducing magnetic leakage, and increasing the effective magnetic flux density.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a rotor lamination, rotor core, rotor, and motor of a reluctance motor. Background Technology

[0002] Reluctance motors, operating on the principle of minimum reluctance, offer advantages such as simple structure, high reliability, and low cost, leading to their widespread application in industrial drives and household appliances. The rotor laminations are the core component of the reluctance motor rotor, and their structural design directly affects the motor's magnetic field distribution, torque output, efficiency, and operational stability.

[0003] In existing technologies, the salient pole structure and magnet mounting method of reluctance motor rotor laminations often suffer from problems such as unreasonable magnetic field paths, severe magnetic leakage, and limited reluctance torque enhancement, making it difficult to meet the requirements of high-performance motor operation. Furthermore, the dimensional accuracy and machining quality of the laminations also affect the stacking performance of the rotor core and the overall operating effect. Therefore, designing a rotor lamination structure that can optimize the magnetic field path, improve torque output, and ensure machining accuracy is of great significance. Utility Model Content

[0004] The purpose of this invention is to provide a rotor lamination for a reluctance motor, which solves the problems of unreasonable magnetic field path and insufficient torque output in the rotor lamination of reluctance motors in the prior art. At the same time, through reasonable structural design and strict dimensional control, the processing quality and performance of the lamination are guaranteed.

[0005] To solve the above-mentioned technical problems, this utility model provides a rotor lamination for a reluctance motor, including a lamination body. Several salient pole structures are evenly distributed in the circumferential direction of the lamination body. Each salient pole structure is composed of several V-shaped magnet mounting units. Each magnet mounting unit includes a left magnet mounting slot and a right magnet mounting slot. The left magnet mounting slot and the right magnet mounting slot have the same structure and are mirror images of each other, arranged in a V-shape on the lamination body. The apex of each magnet mounting unit points to the center of the rotor lamination.

[0006] Furthermore, the magnet mounting unit includes a first magnet mounting unit, a second magnet mounting unit, and a third magnet mounting unit. The first magnet mounting unit, the second magnet mounting unit, and the third magnet mounting unit are arranged sequentially and in the same direction on the lamination body from the outer edge of the lamination body. The V-shaped opening angle of the first magnet mounting unit is 100°, the V-shaped opening angle of the second magnet mounting unit is 89°, and the V-shaped opening angle of the third magnet mounting unit is 74°.

[0007] Furthermore, a magnetic isolation bridge is formed between the left magnet mounting slot and the right magnet mounting slot, and the width of the magnetic isolation bridge is 1mm.

[0008] Furthermore, the magnet mounting unit also includes permanent magnets disposed in the left magnet mounting slot and the right magnet mounting slot.

[0009] Furthermore, the permanent magnets are embedded in each salient pole in a V-shaped arrangement, with the apex of the V-shaped permanent magnet pointing towards the center of the rotor, and the direction of their magnetic field is aligned with the direction of the magnetic reluctance change of the rotor salient pole.

[0010] The arrangement of the three V-shaped permanent magnets further enhances the quadrature-axis magnetic field and increases the reluctance torque, specifically manifested in the increased difference between the quadrature and direct-axis inductances. The structure of the three V-shaped permanent magnets creates a "magnetic flux focusing" effect, reducing magnetic leakage and increasing the effective magnetic flux density. After the V-shaped permanent magnets are embedded in the rotor core, they form a complementary path with the armature magnetic field in the core, avoiding local magnetic saturation and improving the utilization rate of the magnetic circuit.

[0011] Furthermore, the salient pole structure has eight parts, and the lamination body is also provided with rivet holes, which are located between two adjacent salient pole structures.

[0012] Furthermore, the main body of the stamping has a central shaft hole with a diameter of 43mm-43.03mm, a limiting groove on the shaft hole, a thickness of 0.5mm, and a diameter of 146.77mm-146.8mm.

[0013] This utility model also proposes a rotor core, which is formed by stacking multiple rotor laminations as described above.

[0014] This utility model also proposes a rotor, including the rotor core as described above.

[0015] This utility model also proposes an electric motor, including the rotor as described above.

[0016] The technical solution of this utility model involves setting three V-shaped magnet mounting units in the salient pole structure of the rotor lamination, with each unit having a specific opening angle (100°, 89°, 74°). The magnetic field direction of the V-shaped permanent magnets is aligned with the direction of magnetic reluctance change of the rotor salient pole (cross-axis direction), directly enhancing the cross-axis magnetic flux, thereby increasing the cross-axis and direct-axis inductance difference and significantly improving the reluctance torque. The magnetic energy of the three V-shaped permanent magnets optimizes the magnetic field path, making the magnetic field distribution more reasonable and effectively improving the reluctance torque of the reluctance motor. The V-shaped structure creates a "magnetic flux focusing" effect, concentrating the magnetic flux of the permanent magnets in the air gap region, reducing leakage flux, and increasing the effective magnetic flux density. After the permanent magnets of this shape are embedded in the rotor core, the permanent magnet magnetic field and the armature magnetic field form a complementary path in the core, avoiding local magnetic saturation (such as at the root of the salient pole) and improving the magnetic circuit utilization rate. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the rotor lamination structure of a reluctance motor according to the present invention;

[0018] Figure 2 This is a schematic diagram of the rotor lamination salient pole structure of a reluctance motor according to the present invention.

[0019] Figure 3 This is a schematic diagram showing the salient pole structure dimensions of the rotor lamination of a reluctance motor according to the present invention.

[0020] Wherein: 1-Stamp body, 2-Sagittal pole structure, 21-Left magnet mounting slot, 22-Right magnet mounting slot, 23-First magnet mounting unit, 24-Second magnet mounting unit, 25-Third magnet mounting unit, 26-Magnetic bridge, 3-Rivet hole, 4-Shaft hole. Detailed Implementation

[0021] To make the objectives and advantages of this utility model clearer, the utility model will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0024] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] like Figures 1 to 3As shown, a rotor lamination for a reluctance motor includes a lamination body 1. Several salient pole structures 2 are evenly distributed around the lamination body 1. Each salient pole structure 2 is composed of several V-shaped magnet mounting units. Each magnet mounting unit includes a left magnet mounting slot 21 and a right magnet mounting slot 22. The left magnet mounting slot 21 and the right magnet mounting slot 22 have the same structure and are mirror images of each other, arranged in a V-shape on the lamination body 1. The apex of the magnet mounting unit points to the center of the rotor lamination.

[0027] The magnet mounting unit includes a first magnet mounting unit 23, a second magnet mounting unit 24, and a third magnet mounting unit 25. The first magnet mounting unit 23, the second magnet mounting unit 24, and the third magnet mounting unit 25 are arranged sequentially in the same direction from the outer edge of the lamination body 1. The V-shaped opening angle of the first magnet mounting unit 23 is 100°, the V-shaped opening angle of the second magnet mounting unit 24 is 89°, and the V-shaped opening angle of the third magnet mounting unit 25 is 74°.

[0028] A magnetic isolation bridge 26 is formed between the left magnet mounting slot 21 and the right magnet mounting slot 22. The width of the magnetic isolation bridge 26 is 1mm. The magnetic isolation bridge structure formed between the left and right magnet mounting slots can reduce magnetic leakage, improve magnetic field utilization, and further enhance the output performance of the motor.

[0029] The magnet mounting unit also includes permanent magnets disposed in the left magnet mounting slot 21 and the right magnet mounting slot 22.

[0030] The permanent magnets are embedded in each salient pole in a V-shaped arrangement. The apex of the V-shaped permanent magnets points to the center of the rotor, and the direction of their magnetic field is aligned with the direction of magnetic reluctance change of the rotor salient poles.

[0031] The arrangement of the three V-shaped permanent magnets further enhances the quadrature-axis magnetic field and increases the reluctance torque, specifically manifested in the increased difference between the quadrature and direct-axis inductances. The structure of the three V-shaped permanent magnets creates a "magnetic flux focusing" effect, reducing magnetic leakage and increasing the effective magnetic flux density. After the V-shaped permanent magnets are embedded in the rotor core, they form a complementary path with the armature magnetic field in the core, avoiding local magnetic saturation and improving the utilization rate of the magnetic circuit.

[0032] The salient pole structure 2 has eight parts, and the lamination body 1 also has rivet holes 3. The rivet holes 3 are located between two adjacent salient pole structures 2. The arrangement of eight salient pole structures and eight rivet holes ensures the stability and reliability of the rotor laminations when they are stacked to form the rotor core, and ensures the overall structural strength of the rotor. The diameter of the circle drawn with the center of the eight rivet holes is 75mm.

[0033] The stamping body 1 has a shaft hole 4 at its center. The diameter of the shaft hole 4 is 43mm-43.03mm. A limiting groove is provided on the shaft hole 4. The straight distance from the bottom of the limiting groove to the edge of the shaft hole 4 is 41mm. The thickness of the stamping body 1 is 0.5mm. The diameter of the stamping body 1 is 146.77mm-146.8mm.

[0034] Precise control of the dimensions of the lamination body, such as the shaft hole, diameter, and thickness, as well as the requirements for burrs (no more than 0.05mm, in the same direction), missing pieces, and flatness during processing, ensures the processing accuracy and quality of the lamination, which is beneficial to improving the running stability and service life of the motor. 50DW470 silicon steel sheet is selected as the raw material for the lamination body 1. This material has excellent magnetic permeability and iron loss characteristics, and is suitable for manufacturing motor rotor laminations. The lamination body 1 is punched using precision stamping equipment to ensure that the lamination thickness is 0.5mm. During the punching process, the central shaft hole 4 is precisely machined to control its diameter within the range of 43mm-43.03mm; at the same time, the outer diameter of the main body 1 of the punch is ensured to be 146.77mm-146.8mm; according to the design requirements, eight evenly distributed salient pole structures 2 are machined upward around the main body 1 of the punch, and a first magnet mounting unit 23, a second magnet mounting unit 24, and a third magnet mounting unit 25 are machined in each salient pole structure 2, ensuring that the V-shaped opening angles of each unit are 100°, 89°, and 74° respectively, and the left and right magnet mounting slots are mirrored, with the apex pointing to the center of the punch. A magnetic bridge 26 with a width of 1mm is machined between the left and right magnet mounting slots, and eight rivet holes 3 are machined between adjacent salient pole structures 2. The punch is deburred to ensure that the burrs are no larger than 0.05mm and have the same direction, while ensuring that the punch has no missing pieces and is flat.

[0035] This utility model is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort shall fall within the protection scope of this utility model.

Claims

1. A rotor lamination for a reluctance motor, comprising a lamination body (1) characterized in that, Several salient pole structures (2) are evenly distributed around the lamination body (1). Each salient pole structure (2) is composed of several V-shaped magnet mounting units. Each magnet mounting unit includes a left magnet mounting slot (21) and a right magnet mounting slot (22). The left magnet mounting slot (21) and the right magnet mounting slot (22) have the same structure and are mirror images of each other in a V-shape on the lamination body (1). The apex of the magnet mounting unit points to the center of the rotor lamination.

2. The rotor lamination according to claim 1, characterized in that, The magnet mounting unit includes a first magnet mounting unit (23), a second magnet mounting unit (24), and a third magnet mounting unit (25). The first magnet mounting unit (23), the second magnet mounting unit (24), and the third magnet mounting unit (25) are arranged in the same direction from the outer edge of the lamination body (1) inward. The V-shaped opening angle of the first magnet mounting unit (23) is 100°, the V-shaped opening angle of the second magnet mounting unit (24) is 89°, and the V-shaped opening angle of the third magnet mounting unit (25) is 74°.

3. The rotor lamination according to claim 1, characterized in that, A magnetic isolation bridge (26) is formed between the left magnet mounting slot (21) and the right magnet mounting slot (22), and the width of the magnetic isolation bridge (26) is 1 mm.

4. The rotor lamination according to claim 1, characterized in that, The magnet mounting unit also includes permanent magnets disposed in the left magnet mounting slot (21) and the right magnet mounting slot (22).

5. The rotor lamination according to claim 1, characterized in that, The salient pole structure (2) has eight parts, and the lamination body (1) is also provided with rivet holes (3), which are located between two adjacent salient pole structures (2).

6. The rotor lamination according to claim 1, characterized in that, The punch body (1) has a shaft hole (4) at its center, and the shaft hole (4) has a limiting groove.

7. A rotor core, characterized in that, It is formed by stacking rotor laminations as described in any one of claims 1 to 6.

8. A rotor, characterized in that, Includes the rotor core as described in claim 7.

9. An electric motor, characterized in that, Includes the rotor as described in claim 8.

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