A synchronous reluctance motor rotor lamination structure

Abstract

The application discloses a rotor lamination structure of a synchronous reluctance motor, and relates to the technical field of motor rotor lamination structures, which comprises a silicon steel body with a circular cross section, four groups of air gap magnetic barriers are arranged on the silicon steel body, and the four groups of air gap magnetic barriers are evenly distributed with the center of the silicon steel body as a rotation center; each group of the air gap magnetic barriers comprises at least four layers of air gap magnetic barriers, and three layers of air gap magnetic barriers close to the center of the silicon steel body are provided with reinforcing ribs. The mechanical strength of the rotor core is improved through the design of the reinforcing ribs, the reinforcing ribs are arranged, the local magnet oversaturation in the rotor core is reduced, the rotor iron loss is reduced, and the efficiency of the rotor of the synchronous reluctance motor is improved.

Description

Technical Field

[0001] This invention relates to the field of motor rotor lamination structure technology, and in particular to a synchronous reluctance motor rotor lamination structure. Background Technology

[0002] With the continuous innovation and rapid development of modern industry, and the ever-increasing price of high-performance rare-earth permanent magnet materials, more and more research institutes and manufacturing enterprises are beginning to seek alternatives to permanent magnet synchronous motors. For example, they are using ferrite to replace the permanent magnet materials in permanent magnet synchronous motors, or even eliminating the permanent magnet materials altogether, to reduce the cost of the motor, hoping to maintain or even improve the motor's performance while reducing costs.

[0003] Synchronous reluctance motors are high-performance motors possessing the above characteristics. Their stator structure is basically the same as that of a three-phase asynchronous motor, with the windings generating a rotating magnetic field when connected to an AC power source. The rotor is made of laminated silicon steel sheets, with multiple layers of magnetic barriers on the core, and no starting winding. The motor generates electromagnetic torque due to the difference in reluctance between the direct and quadrature axes, thus achieving electromechanical energy conversion.

[0004] Synchronous reluctance motors and their drive systems possess significant advantages such as simple structure, low cost, high reliability, and superior performance, making them highly promising for application in the electric vehicle drive field. Compared to AC asynchronous motors, synchronous reluctance motors have the same stator structure design but no windings on the rotor, generating only reluctance torque. Compared to traditional asynchronous motors, synchronous reluctance motors have higher rated operating efficiency and can maintain high efficiency over a wider load range, effectively saving energy. Compared to permanent magnet synchronous motors, synchronous reluctance motors do not have permanent magnets on the rotor, eliminating the risk of demagnetization or loss of magnetism under high-temperature conditions, and effectively reducing dependence on rare earth resources, meeting the social requirements of "energy conservation and environmental protection." Therefore, they have enormous development potential in AC speed control systems.

[0005] Therefore, how to provide a rotor lamination structure for a synchronous reluctance motor to further improve the working efficiency of the synchronous reluctance motor has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a rotor lamination structure for a synchronous reluctance motor, thereby addressing the problem that the working efficiency of existing synchronous reluctance rotors needs further improvement.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] The present invention discloses a rotor lamination structure for a synchronous reluctance motor, comprising a silicon steel body with a circular cross-section, wherein four sets of air gap magnetic barriers are provided on the silicon steel body, and the four sets of air gap magnetic barriers are evenly distributed around the center of the silicon steel body; each set of air gap magnetic barriers includes at least four layers of air gap magnetic barriers, wherein the three layers of air gap magnetic barriers closest to the center of the silicon steel body are provided with reinforcing ribs.

[0009] Preferably, the at least four layers of air gap magnetic barriers include a first layer of air gap magnetic barriers, a second layer of air gap magnetic barriers, a third layer of air gap magnetic barriers, and a fourth layer of air gap magnetic barriers arranged sequentially from the inside out.

[0010] Each air gap magnetic barrier includes a front end, a middle end, and a rear end, which are connected in sequence. The middle end of the air gap magnetic barrier is perpendicular to the rotor q-axis, and the centerline of the middle end of the air gap magnetic barrier coincides with the rotor q-axis. The front end and rear end of the air gap magnetic barrier extend outward along the adjacent rotor d-axis, and the angle formed by the extension direction and the adjacent rotor d-axis ranges from 0° to 60°. The ends of the front end and rear end of the air gap magnetic barrier are located inside the silicon steel body. The lengths of the front end and rear end of the first, second, third, and fourth air gap magnetic barriers decrease sequentially.

[0011] Preferably, the middle portion of the first layer of air gap magnetic barrier is provided with a first reinforcing rib and a second reinforcing rib at both ends; the middle portion of the second layer of air gap magnetic barrier is provided with a third reinforcing rib and a fourth reinforcing rib at both ends; the middle portion of the third layer of air gap magnetic barrier is provided with a fifth reinforcing rib and a sixth reinforcing rib at both ends; the reinforcing ribs sequentially separate the front end portion, the middle portion and the rear end portion of the air gap magnetic barrier.

[0012] The width of the first and second reinforcing ribs is defined as L1, the width of the third and fourth reinforcing ribs is defined as L2, and the width of the fifth and sixth reinforcing ribs is defined as L3. The width of the reinforcing ribs is L, where 0.9σ≤L≤3σ, and σ is the width of the working air gap, which is defined as the air gap between the stator core and the rotor core.

[0013] Preferably, the maximum width of the first air gap magnetic barrier is defined as H1, the maximum width of the second air gap magnetic barrier is defined as H2, the maximum width of the third air gap magnetic barrier is defined as H3, the maximum width of the fourth air gap magnetic barrier is defined as H4, and the effective length of the silicon steel body is expressed as the difference between the radius r1 of the silicon steel body and the radius r2 of the shaft hole.

[0014] Wherein, the ratio of H1 to the effective length of the silicon steel body is 12%-15%, the ratio of H2 to the effective length of the silicon steel body is 7%-9%, the ratio of H3 to the effective length of the silicon steel body is 5%-7%, and the ratio of H4 to the effective length of the silicon steel body is 4%-5%.

[0015] Preferably, the width of the magnetically conductive channel formed between adjacent air gap magnetic barriers gradually decreases outward along the radial direction of the rotor core.

[0016] Preferably, an opening groove is provided at the end of the front end portion of the air gap magnetic barrier, and the air gap magnetic barrier is connected to the working air gap through the opening groove; the width of the opening groove is defined as w, and 1.5σ≤w≤3σ.

[0017] Preferably, the opening slot is provided with a beveled structure, which is disposed on one side wall of the front end portion, and the angle formed by the beveled structure and the corresponding side wall is θ, wherein 120°≤θ≤150°.

[0018] Preferably, a first inclined structure is provided on the first air gap magnetic barrier, a second inclined structure is provided on the second air gap magnetic barrier, a third inclined structure is provided on the third air gap magnetic barrier, and a fourth inclined structure is provided on the fourth air gap magnetic barrier 4.

[0019] The included angle θ at the first hypotenuse structure, the second hypotenuse structure, the third hypotenuse structure, and the fourth hypotenuse structure decreases sequentially.

[0020] Preferably, the width of the end portion of the rear end of the first air gap magnetic barrier is set to M1, the width of the end portion of the rear end of the second air gap magnetic barrier is set to M2, the width of the end portion of the rear end of the third air gap magnetic barrier is set to M3, and the width of the end portion of the rear end of the fourth air gap magnetic barrier is set to M4; and 0.3H1≤M1≤0.7H1, 0.3H2≤M2≤0.7H2, 0.3H3≤M3≤0.7H3, 0.3H4≤M4≤0.7H4, where H1 is the maximum width of the first air gap magnetic barrier, H2 is the maximum width of the second air gap magnetic barrier, H3 is the maximum width of the third air gap magnetic barrier, and H4 is the maximum width of the fourth air gap magnetic barrier.

[0021] Preferably, the end portion of the rear end portion of the first air gap magnetic barrier is composed of an arc with a radius of R10 and a radius of R11, wherein R10 is half of H1 and R11 is half of M1, and H1 is the maximum width of the first air gap magnetic barrier.

[0022] The end portion of the rear end of the second air gap magnetic barrier is composed of arcs with radii R8 and R9, where R8 is half of H2 and R9 is half of M2, and H2 is the maximum width of the second air gap magnetic barrier.

[0023] The end portion of the rear end of the third air gap magnetic barrier is composed of arcs with radii of R6 and R7, where R6 is half of H3 and R7 is half of M3, and H3 is the maximum width of the third air gap magnetic barrier.

[0024] The end portion of the rear end of the fourth air gap magnetic barrier is composed of arcs with radii R3, R4, and R5. R3 is the length between the rear end of the fourth air gap magnetic barrier and the center of the rotor core. R4 is half of H4, and R5 is half of M4. H4 is the maximum width of the fourth air gap magnetic barrier.

[0025] Preferably, the shape of the air gap magnetic barrier includes a rectangle, an arc, or a combination of multiple shapes.

[0026] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0027] This invention discloses a rotor lamination structure for a synchronous reluctance motor. Four sets of air gap magnetic barriers are arranged on a silicon steel body, with the center of the silicon steel body as the center of rotational symmetry. Each set of air gap magnetic barriers includes at least four layers, with reinforcing ribs provided on the three layers of air gap magnetic barriers closest to the center of the silicon steel body. The reinforcing ribs improve the mechanical strength of the rotor core and help reduce local magnet oversaturation within the rotor core, thereby reducing rotor iron loss.

[0028] This invention features an opening slot at the front end of each air gap magnetic barrier, connecting the working air gap and the air gap magnetic barrier. A beveled structure is also provided at the opening slot. This opening slot increases the q-axis magnetic reluctance of the motor, reduces leakage flux, lowers the q-axis inductance, and increases the electromagnetic torque of the motor, thereby improving the operating efficiency of the synchronous reluctance motor with this design. The beveled structure ensures that the d-axis magnetic flux enters the stator teeth, while simultaneously reducing flux pulsation and motor torque pulsation. Attached Figure Description

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 Schematic diagram of the rotor lamination of the synchronous reluctance motor of the present invention Figure 1 ;

[0031] Figure 2 Schematic diagram of the rotor lamination of the synchronous reluctance motor of the present invention Figure 2 ;

[0032] Figure 3 Schematic diagram of the rotor lamination of the synchronous reluctance motor of the present invention Figure 3 ;

[0033] Figure 4 The torque simulation data diagram for the rotor lamination with open slots of the present invention;

[0034] Figure 5 This is a simulation data diagram of the torque of a rotor lamination with a beveled structure at the opening slot of the present invention.

[0035] Explanation of reference numerals in the attached drawings: 1. First layer of air gap magnetic barrier; 2. Second layer of air gap magnetic barrier; 3. Third layer of air gap magnetic barrier; 4. Fourth layer of air gap magnetic barrier; 5. First reinforcing rib; 6. Third reinforcing rib; 7. Second reinforcing rib; 8. Fifth reinforcing rib; 9. Fourth reinforcing rib; 10. Sixth reinforcing rib; 11. Silicon steel body; 12. Fourth beveled structure; 13. Third beveled structure; 14. Second beveled structure; 15. First beveled structure; 16. Working air gap; 17. Opening slot. Detailed Implementation

[0036] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] like Figure 1-3 As shown, a synchronous reluctance motor rotor lamination structure includes a silicon steel body 11 with a circular cross-section. Four sets of air gap magnetic barriers are provided on the silicon steel body 11, and the four sets of air gap magnetic barriers are evenly distributed around the center of the silicon steel body 11. Each set of air gap magnetic barriers includes at least four layers of air gap magnetic barriers, wherein the three layers of air gap magnetic barriers closest to the center of the silicon steel body 11 are provided with reinforcing ribs.

[0038] The design of the reinforcing ribs improves the mechanical strength of the rotor core, and the reinforcing ribs also help reduce local magnet oversaturation inside the rotor core, thereby reducing rotor iron loss.

[0039] Specifically, the at least four layers of air gap magnetic barriers include a first layer of air gap magnetic barrier 1, a second layer of air gap magnetic barrier 2, a third layer of air gap magnetic barrier 3, and a fourth layer of air gap magnetic barrier 4 arranged sequentially from the inside out.

[0040] Each air gap magnetic barrier includes a front end, a middle end, and a rear end, which are connected in sequence. The middle end of the air gap magnetic barrier is perpendicular to the rotor q-axis, and the centerline of the middle end of the air gap magnetic barrier coincides with the rotor q-axis. The front end and rear end of the air gap magnetic barrier extend outward along the adjacent rotor d-axis, and the angle between the extension direction and the adjacent rotor d-axis ranges from 0° to 60°. The ends of the front end and rear end of the air gap magnetic barrier are located inside the silicon steel body 11. The lengths of the front end and rear end of the first air gap magnetic barrier 1, the second air gap magnetic barrier 2, the third air gap magnetic barrier 3, and the fourth air gap magnetic barrier 4 decrease sequentially.

[0041] Specifically, the first layer of air gap magnetic barrier 1 has a first reinforcing rib 5 and a second reinforcing rib 7 respectively provided at both ends of the middle part; the second layer of air gap magnetic barrier 2 has a third reinforcing rib 6 and a fourth reinforcing rib 9 respectively provided at both ends of the middle part; the third layer of air gap magnetic barrier 3 has a fifth reinforcing rib 8 and a sixth reinforcing rib 10 respectively provided at both ends of the middle part; the reinforcing ribs sequentially separate the front end, middle part and rear end of the air gap magnetic barrier;

[0042] The width of the first reinforcing rib 5 and the second reinforcing rib 7 is defined as L1, the width of the third reinforcing rib 6 and the fourth reinforcing rib 9 is defined as L2, the width of the fifth reinforcing rib 8 and the sixth reinforcing rib 10 is defined as L3, and the width of the reinforcing rib is L, where 0.9σ≤L≤3σ, where σ is the width of the working air gap 16, and the working air gap 16 is defined as the air gap between the stator core and the rotor core.

[0043] The width of the reinforcing ribs affects the leakage magnetic properties of the rotor core. A reinforcing rib design with appropriate width can not only enhance the mechanical strength of the rotor core, but also further reduce the leakage magnetic properties of the rotor core.

[0044] Specifically, the maximum width of the first layer of air gap magnetic barrier 1 is defined as H1, the maximum width of the second layer of air gap magnetic barrier 2 is defined as H2, the maximum width of the third layer of air gap magnetic barrier 3 is defined as H3, the maximum width of the fourth layer of air gap magnetic barrier 4 is defined as H4, and the effective length of the silicon steel body 11 is expressed as the difference between the radius r1 of the silicon steel body 11 and the radius r2 of the rotating shaft hole.

[0045] Wherein, the ratio of H1 to the effective length of the silicon steel body 11 is 12%-15%, the ratio of H2 to the effective length of the silicon steel body 11 is 7%-9%, the ratio of H3 to the effective length of the silicon steel body 11 is 5%-7%, and the ratio of H4 to the effective length of the silicon steel body 11 is 4%-5%.

[0046] Specifically, the width of the magnetic channel formed between adjacent air gap magnetic barriers gradually decreases outward along the radial direction of the rotor core.

[0047] Specifically, an opening groove 17 is provided at the end of the front end of the air gap magnetic barrier, and the air gap magnetic barrier is connected to the working air gap 16 through the opening groove 17; the width of the opening groove 17 is defined as w, and 1.5σ≤w≤3σ.

[0048] The open slot design increases the q-axis reluctance of the motor, reduces leakage flux, lowers the q-axis inductance, and increases the electromagnetic torque of the motor, thereby improving the working efficiency of the synchronous reluctance motor with this structural design.

[0049] like Figure 4 As shown, in the simulation test environment, the reluctance torque of the rotor core laminations without slot 17 but with other identical structures is 84.9925 N·m, while the reluctance torque of the rotor core laminations with slot 17 is 96.1002 N·m. Correspondingly, the torque pulse also increases from 13.19% to 31.82%, an increase of 18.63%. The formula for calculating the torque pulse of the rotor core laminations with slot 17 is (113.6942 - 93.3166) / 96.1002 = 31.82%.

[0050] Specifically, the opening slot 17 is provided with a beveled structure, which is provided on one side wall of the front end portion, and the angle formed by the beveled structure and the corresponding side wall is θ, where 120°≤θ≤150°.

[0051] Specifically, the first layer of air gap magnetic barrier 1 is provided with a first inclined structure 15, the second layer of air gap magnetic barrier 2 is provided with a second inclined structure 14, the third layer of air gap magnetic barrier 3 is provided with a third inclined structure 13, and the fourth layer of air gap magnetic barrier 4 is provided with a fourth inclined structure 12.

[0052] The included angle θ at the first hypotenuse structure 15, the second hypotenuse structure 14, the third hypotenuse structure 13 and the fourth hypotenuse structure 12 decreases sequentially.

[0053] The inclined side structure ensures that the d-axis magnetic flux enters the stator teeth, while reducing magnetic flux pulsation and motor torque pulsation.

[0054] like Figure 5 As shown, after setting the inclined structure at the opening slot 17, the average value of its output mechanical torque is 92.13888 N·m, which is 3.96 N·m less than the output mechanical torque of the rotor core lamination without the inclined structure; the torque pulse is reduced by 4.92%.

[0055] Specifically, the width of the end portion of the rear end of the first layer air gap magnetic barrier 1 is set to M1, the width of the end portion of the rear end of the second layer air gap magnetic barrier 2 is set to M2, the width of the end portion of the rear end of the third layer air gap magnetic barrier 3 is set to M3, and the width of the end portion of the rear end of the fourth layer air gap magnetic barrier 4 is set to M4; and 0.3H1≤M1≤0.7H1, 0.3H2≤M2≤0.7H2, 0.3H3≤M3≤0.7H3, 0.3H4≤M4≤0.7H4, where H1 is the maximum width of the first layer air gap magnetic barrier 1, H2 is the maximum width of the second layer air gap magnetic barrier 2, H3 is the maximum width of the third layer air gap magnetic barrier 3, and H4 is the maximum width of the fourth layer air gap magnetic barrier 4.

[0056] Specifically, the end portion of the rear end of the first layer of air gap magnetic barrier 1 is composed of an arc with a radius of R10 and a radius of R11, wherein R10 is half of H1 and R11 is half of M1, and H1 is the maximum width of the first layer of air gap magnetic barrier 1.

[0057] The end portion of the rear end of the second air gap magnetic barrier 2 is composed of arcs with radii of R8 and R9, where R8 is half of H2 and R9 is half of M2, and H2 is the maximum width of the second air gap magnetic barrier 2.

[0058] The end portion of the rear end of the third air gap magnetic barrier 3 is composed of arcs with radii of R6 and R7, where R6 is half of H3 and R7 is half of M3, and H3 is the maximum width of the third air gap magnetic barrier 3.

[0059] The end portion of the rear end of the fourth air gap magnetic barrier 4 is composed of arcs with radii of R3, R4 and R5. R3 is the length between the rear end of the fourth air gap magnetic barrier and the center of the rotor core. R4 is half of H4 and R5 is half of M4. H4 is the maximum width of the fourth air gap magnetic barrier 4.

[0060] The arc design ensures both machining feasibility and core strength while optimizing the distribution of the main magnetic flux and leakage flux outside the magnetic bridge, thereby increasing reluctance torque and reducing pulsation.

[0061] Specifically, the shape of the air gap magnetic barrier includes rectangular, arc-shaped, or a combination of multiple shapes.

[0062] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0063] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A rotor lamination structure for a synchronous reluctance motor, characterized in that: The system includes a silicon steel body (11) with a circular cross-section. Four sets of air gap magnetic barriers are provided on the silicon steel body (11). The four sets of air gap magnetic barriers are evenly distributed around the center of the silicon steel body (11). Each set of air gap magnetic barriers includes at least four layers of air gap magnetic barriers. The three layers of air gap magnetic barriers closest to the center of the silicon steel body (11) are provided with reinforcing ribs. The at least four layers of air gap magnetic barriers include a first layer of air gap magnetic barrier (1), a second layer of air gap magnetic barrier (2), a third layer of air gap magnetic barrier (3), and a fourth layer of air gap magnetic barrier (4) arranged sequentially from the inside out. Each air gap magnetic barrier includes a front end, a middle end, and a rear end, which are connected in sequence. The middle end of the air gap magnetic barrier is perpendicular to the rotor q-axis, and the center line of the middle end of the air gap magnetic barrier coincides with the rotor q-axis. The front end and rear end of the air gap magnetic barrier extend outward along the adjacent rotor d-axis, and the angle between the extension direction and the adjacent rotor d-axis is in the range of 0°-60°. The ends of the front end and rear end of the air gap magnetic barrier are located inside the silicon steel body (11). The lengths of the front end and rear end of the first air gap magnetic barrier (1), the second air gap magnetic barrier (2), the third air gap magnetic barrier (3), and the fourth air gap magnetic barrier (4) decrease sequentially. The width of the magnetically conductive channel formed between adjacent air gap magnetic barriers gradually decreases outward along the radial direction of the rotor core; The width of the end portion of the rear end of the first layer air gap magnetic barrier (1) is set to M1, the width of the end portion of the rear end of the second layer air gap magnetic barrier (2) is set to M2, the width of the end portion of the rear end of the third layer air gap magnetic barrier (3) is set to M3, and the width of the end portion of the rear end of the fourth layer air gap magnetic barrier (4) is set to M4; and 0.3H1≤M1≤0.7H1, 0.3H2≤M2≤0.7H2, 0.3H3≤M3≤0.7H3, 0.3H4≤M4≤0.7H4, where H1 is the maximum width of the first layer air gap magnetic barrier (1), H2 is the maximum width of the second layer air gap magnetic barrier (2), H3 is the maximum width of the third layer air gap magnetic barrier (3), and H4 is the maximum width of the fourth layer air gap magnetic barrier (4); The end portion of the rear end of the first layer of air gap magnetic barrier (1) is composed of an arc with a radius of R10 and a radius of R11, wherein R10 is half of H1 and R11 is half of M1. The end portion of the rear end of the second air gap magnetic barrier (2) is composed of arcs with radii of R8 and R9, where R8 is half of H2 and R9 is half of M2. The end portion of the rear end of the third air gap magnetic barrier (3) is composed of an arc with a radius of R6 and a radius of R7, wherein R6 is half of H3 and R7 is half of M3. The end portion of the rear end of the fourth air gap magnetic barrier (4) is composed of arcs with radii of R3, R4 and R5, where R3 is the length between the rear end of the fourth air gap magnetic barrier and the center of the rotor core, R4 is half of H4 and R5 is half of M4.

2. The synchronous reluctance motor rotor lamination structure according to claim 1, characterized in that: The first layer of air gap magnetic barrier (1) has a first reinforcing rib (5) and a second reinforcing rib (7) at both ends of the middle part; the second layer of air gap magnetic barrier (2) has a third reinforcing rib (6) and a fourth reinforcing rib (9) at both ends of the middle part; the third layer of air gap magnetic barrier (3) has a fifth reinforcing rib (8) and a sixth reinforcing rib (10) at both ends of the middle part; the reinforcing ribs sequentially separate the front end, middle part and rear end of the air gap magnetic barrier; The width of the first reinforcing rib (5) and the second reinforcing rib (7) is defined as L1, the width of the third reinforcing rib (6) and the fourth reinforcing rib (9) is defined as L2, the width of the fifth reinforcing rib (8) and the sixth reinforcing rib (10) is defined as L3, and the width of the reinforcing rib is L, where 0.9σ≤L≤3σ, where σ is the width of the working air gap (16), and the working air gap (16) is defined as the air gap between the stator core and the rotor core.

3. The synchronous reluctance motor rotor lamination structure according to claim 1, characterized in that: The effective length of the silicon steel body (11) is expressed as the difference between the radius r1 of the silicon steel body (11) and the radius r2 of the shaft hole; The ratio of H1 to the effective length of the silicon steel body (11) is 12%-15%, the ratio of H2 to the effective length of the silicon steel body (11) is 7%-9%, the ratio of H3 to the effective length of the silicon steel body (11) is 5%-7%, and the ratio of H4 to the effective length of the silicon steel body (11) is 4%-5%.

4. The synchronous reluctance motor rotor lamination structure according to claim 2, characterized in that: An opening groove (17) is provided at the end of the front end of the air gap magnetic barrier. The air gap magnetic barrier is connected to the working air gap (16) through the opening groove (17). The width of the opening groove (17) is defined as w, and 1.5σ≤w≤3σ.

5. The synchronous reluctance motor rotor lamination structure according to claim 4, characterized in that: An inclined structure is provided at the opening groove (17). The inclined structure is provided on one side wall of the front end portion, and the angle formed by the inclined structure and the corresponding side wall is θ, where 120°≤θ≤150°.

6. The synchronous reluctance motor rotor lamination structure according to claim 5, characterized in that: The first layer of air gap magnetic barrier (1) is provided with a first inclined structure (15), the second layer of air gap magnetic barrier (2) is provided with a second inclined structure (14), the third layer of air gap magnetic barrier (3) is provided with a third inclined structure (13), and the fourth layer of air gap magnetic barrier (4) is provided with a fourth inclined structure (12). The included angle θ at the first hypotenuse structure (15), the second hypotenuse structure (14), the third hypotenuse structure (13), and the fourth hypotenuse structure (12) decreases sequentially.

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