Motor rotor, motor and vehicle

Abstract

A vehicle, the vehicle comprising a motor, the motor comprising a motor rotor. The motor rotor comprises a rotor core and a plurality of magnets. The rotor core is provided with a plurality of circumferentially distributed magnetic poles, the magnetic poles comprise a plurality of rows of magnetic slots spaced apart along the radial direction of the rotor core, the plurality of rows of magnetic slots comprise a first row of magnetic slots, the first row of magnetic slots comprises first primary magnetic slots and a first secondary magnetic slot, the first primary magnetic slots are separately located on two opposite sides of the first secondary magnetic slot, the first secondary magnetic slot comprises a first slot section and a second slot section, and an included angle α is formed between the length direction of the first slot section and the length direction of the second slot section. At least part of the magnets are arranged in the first primary magnetic slots, the first slot section, and the second slot section and are spaced apart from one another.

Description

Rotor of electric machine, electric machine and vehicle

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202421589226.5, filed on July 5, 2024, and entitled “Rotor of electric machine, electric machine and vehicle”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of electric machines, and in particular to a rotor of electric machine, electric machine and vehicle. BACKGROUND

[0004] In the prior art, the space utilization of the magnetic slot arranged on the rotor core of the electric machine is insufficient, which results in that the reluctance torque of the rotor of the electric machine cannot be fully utilized, and in addition, the magnetic field strength on the rotor core is insufficient and the magnetic field distribution is uneven, which causes the electric machine to have a large loss power and reduces the torque of the rotor of the electric machine.

[0005] DISCLOSURE

[0006] The present disclosure aims to at least solve one of the technical problems existing in the prior art. To this end, the present disclosure provides a rotor of electric machine, wherein the length direction of the first slot section and the length direction of the second slot section have an included angle, which can save space and make the space of the first auxiliary magnetic slot more compact, thereby providing more space for the arrangement of the first main magnetic slot, which can increase the area of the first main magnetic slot. In this way, under the condition of ensuring the reluctance torque and the utilization rate of the core, the area of the first main magnetic slot can be increased by increasing the thickness of the magnet, which can enhance the magnetic field strength inside the rotor and reduce the magnetic resistance in the magnetic circuit, thereby improving the torque power of the rotor.

[0007] The present disclosure further provides an electric machine.

[0008] The present disclosure further provides a vehicle.

[0009] The rotor of electric machine according to the first aspect of the present disclosure comprises: a rotor core, the rotor core is provided with a plurality of circumferentially distributed magnetic poles, the magnetic poles comprise a plurality of radially spaced magnetic slot rows, the plurality of magnetic slot rows comprise a first magnetic slot row, the first magnetic slot row comprises a first main magnetic slot and a first auxiliary magnetic slot, the first main magnetic slot is respectively located on the opposite sides of the first auxiliary magnetic slot, the first auxiliary magnetic slot comprises a first slot section and a second slot section, the length direction of the first slot section and the length direction of the second slot section have an included angle α; and a plurality of magnets, at least a part of the magnets are respectively arranged in the first main magnetic slot, the first slot section and the second slot section and are spaced apart from each other.

[0010] Thus, the motor has an included angle between the length direction of the first slot section and the length direction of the second slot section, which can save space, make the space of the first auxiliary magnetic slot more compact, and thus provide more space for the arrangement of the first main magnetic slot, so as to increase the area of the first main magnetic slot. In this way, the area of the first main magnetic slot can be increased by increasing the thickness of the magnet under the condition of ensuring the reluctance torque and the core utilization rate, so as to enhance the magnetic field strength inside the rotor and reduce the magnetic resistance in the magnetic circuit, thereby improving the torque power of the rotor.

[0011] According to some embodiments of the present disclosure, the included angle α satisfies the relationship: p is the number of pole pairs of the motor.

[0012] According to some embodiments of the present disclosure, the first main magnetic slots located on opposite sides of the first auxiliary magnetic slot have an included angle β, and the included angle β satisfies the relationship: p is the number of pole pairs of the motor.

[0013] According to some embodiments of the present disclosure, the center line of the first auxiliary magnetic slot extends along the radial direction of the rotor core, and the first slot section and the second slot section are symmetrically distributed about the center line of the first auxiliary magnetic slot; and / or the first main magnetic slots located on opposite sides of the first auxiliary magnetic slot are symmetrically distributed about the center line of the first auxiliary magnetic slot.

[0014] According to some embodiments of the present disclosure, the first magnetic slot row is a plurality, and the thickness of the magnet in the first slot section increases in the direction extending from the radial outside to the radial inside of the rotor core; and / or the thickness of the magnet in the second slot section increases in the direction extending from the radial outside to the radial inside of the rotor core.

[0015] According to some embodiments of the present disclosure, the minimum value of the thickness of the plurality of magnets is H min , and H min satisfies the relationship: n is the number of the magnetic slot row, and the minimum distance from the intersection point of the center line of the first auxiliary magnetic slot and the outer peripheral edge of the rotor core to the radial extension edge of the magnetic pole is L MN .

[0016] According to some embodiments of the present disclosure, the spacing between the two adjacent magnetic slot rows is W, the minimum value of the thickness of the plurality of magnets is H min , and W and H min satisfy the relationship:

[0017] According to some embodiments of the present disclosure, the thickness of the magnet located in the first main magnetic slot at the radially innermost side of the rotor core is H1, and the minimum value of the thickness of the plurality of magnets is H min , H1 and H min satisfy the relationship: and / or the thickness of the magnet located in the first auxiliary magnetic slot at the radially innermost side of the rotor core is H2, and the minimum value of the thickness of the plurality of magnets is H min , H2 and H min satisfy the relationship:

[0018] According to some embodiments of the present disclosure, a first reinforcing rib is arranged between the first slot section and the second slot section in the first auxiliary magnetic slot at the radially innermost side of the rotor core.

[0019] According to some embodiments of the present disclosure, the rotor core is provided with a weight-reducing hole located radially outward of the magnetic poles of the rotor core.

[0020] According to some embodiments of the present disclosure, the minimum distance between the magnetic slot row and the outer peripheral edge of the rotor core increases in the direction extending from the radially inner side to the radially outer side of the rotor core.

[0021] According to some embodiments of the present disclosure, the number of magnetic slot rows is n, and n satisfies the relationship: 4≤n≤6.

[0022] According to some embodiments of the present disclosure, the magnet is a ferrite permanent magnet.

[0023] According to some embodiments of the present disclosure, the plurality of magnetic slot rows further comprise: a second magnetic slot row located radially outward of the first magnetic slot row, the second magnetic slot row comprising a second main magnetic slot and a second auxiliary magnetic slot, the second main magnetic slot being located on opposite sides of the second auxiliary magnetic slot respectively, the length direction of the second auxiliary magnetic slot being perpendicular to the center line of the first auxiliary magnetic slot, at least a part of the magnets being arranged in the second main magnetic slot and the second auxiliary magnetic slot respectively, the magnets located in the first main magnetic slot and the magnets located in the second main magnetic slot being parallel to each other.

[0024] According to some embodiments of the present disclosure, the plurality of magnetic slot rows further comprise: a third magnetic slot row located radially outward of the second magnetic slot row, the third magnetic slot row comprising two third main magnetic slots, the two third main magnetic slots being connected, at least a part of the magnets being arranged in the third main magnetic slot, the magnets located in the second main magnetic slot and the magnets located in the third main magnetic slot being parallel to each other.

[0025] According to some embodiments of the present disclosure, the thickness of the magnet increases in a direction from the third main magnetic slot to the first main magnetic slot.

[0026] According to some embodiments of the present disclosure, in the first magnetic slot row, the first main magnetic slot and the first auxiliary magnetic slot are provided with a second reinforcing rib therebetween, and the second main magnetic slot and the second auxiliary magnetic slot are provided with a second reinforcing rib therebetween.

[0027] According to some embodiments of the present disclosure, the first magnetic slot row is a plurality, and the width of the second reinforcing rib decreases in a direction from the first magnetic slot row to the plurality of second magnetic slot rows.

[0028] The motor according to the second aspect of the present disclosure comprises the rotor of the motor.

[0029] The vehicle according to the third aspect of the present disclosure comprises the motor.

[0030] Additional aspects and advantages of the present disclosure will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, including the appended drawings.

[0032] Fig. 1 is a schematic structural diagram of a rotor core according to an embodiment of the present disclosure;

[0033] Fig. 2 is a schematic structural diagram of a rotor core containing a second magnetic slot row according to an embodiment of the present disclosure;

[0034] Fig. 3 is a schematic structural diagram of a rotor core containing a third magnetic slot row according to an embodiment of the present disclosure;

[0035] Fig. 4 is a schematic block diagram of a motor according to an embodiment of the present disclosure;

[0036] Fig. 5 is a schematic block diagram of a vehicle according to an embodiment of the present disclosure.

[0037] Reference signs: 2000, vehicle; 1000, motor; 100, rotor of the motor; 10, rotor core; 101, magnetic pole; 11, magnetic slot row; 12, weight-reducing hole; 20, first magnetic slot row; 21, first main magnetic slot; 22, first auxiliary magnetic slot; 221, first slot section; 222, second slot section; 30, magnet; 40, first reinforcing rib; 50, second magnetic slot row; 51, second main magnetic slot; 52, second auxiliary magnetic slot; 60, third magnetic slot row; 61, third main magnetic slot; 70, second reinforcing rib. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0039] A rotor 100 of an electric machine according to embodiments of the present disclosure is described below with reference to FIGS. 1-6.

[0040] Referring to FIGS. 1-3, the rotor 100 of the electric machine according to the first aspect of the present disclosure includes a rotor core 10 and a plurality of magnets 30. The rotor core 10 is provided with a plurality of circumferentially distributed magnetic poles 101, the magnetic poles 101 including a plurality of radially spaced magnetic slot rows 11, the plurality of magnetic slot rows 11 including a first magnetic slot row 20, the first magnetic slot row 20 including a first main magnetic slot 21 and a first auxiliary magnetic slot 22, the first main magnetic slot 21 being respectively located on opposite sides of the first auxiliary magnetic slot 22, the first auxiliary magnetic slot 22 including a first slot section 221 and a second slot section 222, the first slot section 221 and the second slot section 222 having an included angle a between a length direction of the first slot section 221 and a length direction of the second slot section 222, at least a portion of the plurality of magnets 30 being respectively arranged in the first main magnetic slot 21, the first slot section 221 and the second slot section 222, and the plurality of magnets 30 being spaced apart from each other.

[0041] The reluctance torque utilization of the rotor of the conventional electric machine is insufficient, the number of magnetic barrier layers is small, the power loss of the electric machine is large, and the magnetic field strength on the rotor core is insufficient, which reduces the torque of the rotor of the electric machine. In the present disclosure, the rotor 100 of the electric machine mainly includes the rotor core 10 and the plurality of magnets 30. The rotor core 10 is provided with a plurality of circumferentially spaced magnetic poles 101. For example, the rotor core 10 can have six magnetic poles 101, which can reduce eddy current loss and make the magnetic flux more uniformly distributed around the rotor core 10, thereby avoiding local overheating of the rotor core 10.

[0042] Specifically, the magnetic slot rows 11 are arranged radially along the rotor core 10, which can make the electromagnetic force of the rotor core 10 more uniformly distributed and improve the torque of the rotor core 10.

[0043] In addition, the first main magnetic slot 21 and the first auxiliary magnetic slot 22 of the first magnetic slot row 20 in the plurality of magnetic slot rows 11 are spaced apart, and the first main magnetic slot 21 is respectively located on opposite sides of the first auxiliary magnetic slot 22, which can improve the symmetry of the magnetic circuit, reduce the unevenness of the magnetic field, and improve the magnetic flux distribution, thereby improving the efficiency and performance of the electric machine.

[0044] Further, the first auxiliary magnetic slot 22 mainly includes the first slot section 221 and the second slot section 222, and the first slot section 221 and the second slot section 222 have an included angle a between a length direction of the first slot section 221 and a length direction of the second slot section 222. In this way, the thickness of the magnet 30 in the first main magnetic slot 21 can be increased while ensuring the reluctance torque and the core utilization, thereby improving the torque power of the rotor.

[0045] In addition, at least one magnet 30 is arranged in the first main magnetic slot 21, the first slot section 221 and the second slot section 222 respectively, so that the magnetic field strength inside the rotor can be enhanced, and the magnetic flux density of the motor can be improved, thereby improving the overall performance of the motor. The filling of the magnet 30 in the first main magnetic slot 21, the first slot section 221 and the second slot section 222 can reduce the magnetic resistance in the magnetic circuit, thereby improving the energy conversion efficiency of the motor and reducing the loss.

[0046] Therefore, the motor rotor 100 has an included angle between the length direction of the first slot section 221 and the length direction of the second slot section 222, which can save space and make the space of the first auxiliary magnetic slot 22 more compact, thereby providing more space for the arrangement of the first main magnetic slot 21, so that the area of the first main magnetic slot 21 can be increased. In this way, under the condition of ensuring the magnetic resistance torque and the core utilization rate, the area of the first main magnetic slot 21 can be increased by increasing the thickness of the magnet 30, so that the magnetic field strength inside the rotor can be enhanced, and the magnetic resistance in the magnetic circuit can be reduced, thereby improving the torque power of the rotor.

[0047] According to some embodiments of the present disclosure, as shown in FIG. 1, the included angle α satisfies the relationship: p is the number of pole pairs of the motor.

[0048] The length direction of the first slot section 221 and the length direction of the second slot section 222 form an included angle α, and the maximum value of the included angle α is not more than π, so that the space of the first auxiliary magnetic slot 22 can be reduced, thereby providing installation space for the arrangement of the first main magnetic slot 21, increasing the arrangement space of the first main magnetic slot 21, and increasing the thickness of the first main magnetic slot 21, thereby improving the strength of the magnetic field inside the rotor and reducing the magnetic resistance.

[0049] In addition, the minimum value of the included angle α is greater than In this way, the magnet proportion of the first auxiliary magnetic slot 22 can be ensured, thereby ensuring the magnet utilization rate of the first auxiliary magnetic slot 22.

[0050] According to some embodiments of the present disclosure, as shown in FIG. 1, the first main magnetic slot 21 located on opposite sides of the first auxiliary magnetic slot 22 has an included angle β, and the included angle β satisfies the relationship: p is the number of pole pairs of the motor.

[0051] The first main magnetic slot 21 located on opposite sides has an included angle β, thereby increasing the space utilization rate of the magnetic field of the first main magnetic slot 21, thereby further increasing the magnetic field strength of the first main magnetic slot 21.

[0052] In addition, the maximum value of the included angle β is not more than Thus, the magnetic concentration effect between the first main magnetic slots 21 on the opposite sides of the first auxiliary magnetic slot 22 can be ensured, so that the core utilization rate of the first main magnetic slot 21 can be ensured. The minimum value of the included angle β is greater than 0° and less than 90°. In this way, the magnet thickness of the first main magnetic slot 21 can be ensured, the magnet proportion of the first main magnetic slot 21 can be increased, and the torque power of the first main magnetic slot 21 can be ensured.

[0053] According to some embodiments of the present disclosure, as shown in FIG. 1, the center line of the first auxiliary magnetic slot 22 extends in the radial direction of the rotor core 10, the first slot section 221 and the second slot section 222 are symmetrically distributed about the center line of the first auxiliary magnetic slot 22, and / or the first main magnetic slots 21 located on the opposite sides of the first auxiliary magnetic slot 22 are symmetrically distributed about the center line of the first auxiliary magnetic slot 22.

[0054] In the above embodiment, the first slot section 221 and the second slot section 222 are symmetrically distributed about the center line of the first auxiliary magnetic slot 22, which can improve the symmetry of the magnetic circuit between the first slot section 221 and the second slot section 222, reduce the unevenness of the magnetic field between the first slot section 221 and the second slot section 222, and improve the magnetic flux distribution between the first slot section 221 and the second slot section 222. By optimizing the magnetic field distribution between the first slot section 221 and the second slot section 222, the starting torque can be increased, the starting current can be reduced, and the motor can be more stable and reliable during starting.

[0055] In addition, the first slot section 221 and the second slot section 222 are symmetrically distributed about the center line of the first auxiliary magnetic slot 22, which can reduce the unbalanced torque, thereby reducing vibration and noise, and improving the running stability and comfort of the motor.

[0056] In addition, the first main magnetic slots 21 are symmetrically distributed about the center line of the first auxiliary magnetic slot 22, which can improve the symmetry of the first auxiliary magnetic slot 22 on the two sides in the circumferential direction, reduce the unevenness of the magnetic field of the first main magnetic slots 21 on the two sides of the first auxiliary magnetic slot 22, and improve the magnetic flux distribution of the first main magnetic slots 21. By optimizing the magnetic field distribution of the first main magnetic slots 21, the starting torque can be further increased, the starting current can be reduced, and the unbalanced torque of the rotor can be further reduced, thereby reducing vibration and noise.

[0057] According to some embodiments of the present disclosure, as shown in FIG. 1, the first magnetic slot row 20 is a plurality of, in the direction extending from the radial outside to the radial inside of the rotor core 10, the thickness of the magnet 30 in the first slot section 221 increases, and / or in the direction extending from the radial outside to the radial inside of the rotor core 10, the thickness of the magnet 30 in the second slot section 222 increases.

[0058] In the direction extending from the radially outer side to the radially inner side of the rotor core 10, the thickness of the magnet 30 in the first slot section 221 increases, thus the magnetic field intensity at the first slot section 221 can be increased, so that the demagnetization phenomenon caused by the excessively high temperature in the first slot section 221 can be avoided, and the output of the torque at the first slot section 221 can be improved.

[0059] In addition, in the direction extending from the radially outer side to the radially inner side of the rotor core 10, the thickness of the magnet 30 in the second slot section 222 increases, thus the magnetic field intensity at the second slot section 222 can be increased, so that the demagnetization phenomenon caused by the excessively high temperature in the second slot section 222 can be avoided, and the output of the torque at the second slot section 222 can be improved.

[0060] According to some embodiments of the present disclosure, as shown in FIG. 2, the minimum value of the thickness of the plurality of magnets 30 is H min , H min satisfies the relationship: n is the number of the plurality of magnetic slot rows 11, the minimum distance from the intersection of the center line of the first auxiliary magnetic slot 22 and the outer peripheral edge of the rotor core 10 to the radially extending edge of the magnetic pole 101 is L MN .

[0061] Thus, the minimum value of the thickness of the magnet 30 H min satisfies the distribution of the plurality of magnetic slot rows 11, and the condition that the first slot section 221 and the second slot section 222 in the first auxiliary magnetic slot 22 form an included angle. For example, when the total thickness of the accommodated magnets 30 is greater than 13 mm, two magnets 30 with an included angle of a are placed in the first auxiliary magnetic slot 22; when the total thickness of the accommodated magnets 30 is less than 13 mm, one magnet 30 perpendicular to the radial direction is placed in the first auxiliary magnetic slot 22.

[0062] According to some embodiments of the present disclosure, as shown in FIG. 2, the spacing between the adjacent two magnetic slot rows 11 is W, and the minimum value of the thickness of the plurality of magnets 30 is H min , W and H min satisfy the relationship:

[0063] In the present disclosure, the spacing W between the adjacent two magnetic slot rows 11 is less than the minimum thickness H min of the magnet 30, thus the density of the magnetic field distribution between the magnetic slot rows 11 can be increased, and the strength of the magnetic field of the rotor can be further improved, so that the torque of the whole rotor can be improved, and the loss of the motor can be reduced.

[0064] In addition, the spacing W between the adjacent two magnetic slot rows 11 is greater than the minimum thickness H of the magnet 30, thus the interference of the magnetic field between the adjacent two magnetic slot rows 11 can be avoided.

[0065] According to some embodiments of the present disclosure, as shown in FIG. 3, the thickness of the magnet 30 located in the first main magnetic slot 21 at the radially innermost side of the rotor core 10 is H1, and the minimum value of the thickness of the plurality of magnets 30 is H min , H1 and H min satisfy the relationship: and / or the thickness of the magnet 30 located in the first auxiliary magnetic slot 22 at the radially innermost side of the rotor core 10 is H2, and the minimum value of the thickness of the plurality of magnets 30 is H min , H2 and H min satisfy the relationship:

[0066] wherein the thickness H1 of the magnet 30 located in the first main magnetic slot 21 at the radially innermost side of the rotor core 10 is greater than the minimum thickness H of the magnet 30, and thus the magnetic field strength of the first main magnetic slot 21 at the radially innermost side of the rotor core 10 can be increased. min

[0067] Further, the thickness H2 of the magnet 30 located in the first auxiliary magnetic slot 22 at the radially innermost side of the rotor core 10 is greater than the minimum thickness H min of the magnet 30, and the thickness H2 of the magnet 30 located in the first auxiliary magnetic slot 22 at the radially innermost side of the rotor core 10 is also greater than the thickness H1 of the magnet 30 located in the first main magnetic slot 21 at the radially innermost side of the rotor core 10. In this way, the weight of the entire rotor can be redistributed, and since the centrifugal force at the radially outer side of the rotor core 10 is large during rotation, reducing the thickness of the magnet 30 in the first main magnetic slot 21 at the radially outer side of the rotor core 10 can reduce the stress of the rotor core 10 and also avoid demagnetization due to excessive temperature in the first auxiliary magnetic slot 22 at the radially innermost side.

[0068] According to some embodiments of the present disclosure, as shown in FIG. 1, a first reinforcing rib 40 is arranged between the first slot segment 221 and the second slot segment 222 located in the first auxiliary magnetic slot 22 at the radially innermost side of the rotor core 10.

[0069] wherein the first reinforcing rib 40 separates the first slot segment 221 and the second slot segment 222, which can improve the strength between the first slot segment 221 and the second slot segment 222, thereby improving the stability of the rotor core 10 during rotation.

[0070] According to some embodiments of the present disclosure, as shown in FIG. 1, the rotor core 10 is provided with a weight-reducing hole 12, which is located radially on the outer side of the magnetic pole 101.

[0071] ​In the case of not affecting the electromagnetic performance of the rotor, the weight-reducing holes 12 are arranged on the radially outer side of the rotor core 10, so that the stress can be greatly reduced. Further, since the centrifugal force near the outer periphery of the rotor core 10 is large, the total weight of the rotor can be effectively reduced. Moreover, the light rotor can reduce the inertial force during rotation, so that the energy consumption can be reduced and the dynamic response can be improved, and at the same time, the rotor can be enhanced in heat dissipation performance by oil passing through the weight-reducing holes 12.

[0072] According to some embodiments of the present disclosure, as shown in FIG. 1, the minimum distance between the magnetic slot row 11 and the outer peripheral edge of the rotor core 10 increases in the direction extending from the radially inner side to the radially outer side of the rotor core 10.

[0073] In the case of the minimum distance between the magnetic slot row 11 and the outer peripheral edge of the rotor core 10 increasing, the area prone to demagnetization can be avoided, the magnetic field interference of the magnets 30 in the adjacent magnetic slot row 11 can be reduced, the magnetic field distribution uniformity of the motor can be improved, the magnetic field leakage can be reduced, and thus the efficiency and performance of the motor can be improved.

[0074] In addition, in the case of the minimum distance between the magnetic slot row 11 and the outer peripheral edge of the rotor core 10 increasing, the mechanical strength of the rotor can be enhanced, the larger distance can provide more material support, so that the vibration and deformation of the rotor during high-speed rotation can be reduced, and the stability and reliability of the rotor can be enhanced.

[0075] According to some embodiments of the present disclosure, the number of the magnetic slot rows 11 is n, and n satisfies the relationship: 4≤n≤6.

[0076] In the case of the number of the magnetic slot rows 11 being 4, 5 or 6, according to the test results, when the pole pair number of the motor is 6, the torque is obviously improved when the number of the magnetic slot rows 11 is set to 4, 5 or 6, and the torque improvement is small when the number of the magnetic slot rows 11 continues to increase. Therefore, when the number of the magnetic slot rows 11 is set to 4, 5 or 6, the reluctance torque of the motor can be fully utilized.

[0077] According to some embodiments of the present disclosure, as shown in FIG. 2, the plurality of magnetic slot rows 11 further includes a second magnetic slot row 50, the second magnetic slot row 50 is located on the outer side of the first magnetic slot row 20 in the radial direction of the rotor core 10, the second magnetic slot row 50 includes a second main magnetic slot 51 and a second auxiliary magnetic slot 52, the second main magnetic slot 51 is respectively located on the opposite sides of the second auxiliary magnetic slot 52, the length direction of the second auxiliary magnetic slot 52 is perpendicular to the center line of the first auxiliary magnetic slot 22, and a plurality of magnets 30 are further arranged in the second main magnetic slot 51 and the second auxiliary magnetic slot 52, the magnets 30 located in the first main magnetic slot 21 and the magnets 30 located in the second main magnetic slot 51 are parallel to each other.

[0078] The second main magnetic slot 51 is located on both sides of the second auxiliary magnetic slot 52, so that the second main magnetic slot 51 and the second auxiliary magnetic slot 52 are symmetrical, and the magnets 30 in the first main magnetic slot 21 and the magnets 30 in the second main magnetic slot 51 are parallel to each other, so that the magnetic field distribution of the second main magnetic slot 51 and the second auxiliary magnetic slot 52 is more uniform.

[0079] In addition, the length direction of the second auxiliary magnetic slot 52 is perpendicular to the center line of the first auxiliary magnetic slot 22, so that the magnetic field distribution between the second auxiliary magnetic slot 52 and the first auxiliary magnetic slot 22 is more uniform.

[0080] According to some embodiments of the present disclosure, as shown in FIG. 3, the plurality of magnetic slot rows 11 further includes a third magnetic slot row 60, the third magnetic slot row 60 is located on the outer side of the second magnetic slot row 50 in the radial direction of the rotor core 10, the third magnetic slot row 60 includes two third main magnetic slots 61, the two third main magnetic slots 61 are communicated, and a plurality of magnets 30 are further arranged in the third main magnetic slots 61, the magnets 30 located in the second main magnetic slot 51 and the magnets 30 located in the third main magnetic slot 61 are parallel to each other.

[0081] The third magnetic slot row 60 is mainly composed of two third main magnetic slots 61, the two third main magnetic slots 61 are communicated, and a gap is formed between the two third main magnetic slots 61, which not only avoids the influence between the two third main magnetic slots 61, but also can cool and dissipate heat by oil in the gap, and can also reduce the weight of the rotor.

[0082] Further, the magnets 30 in the second main magnetic slot 51 and the magnets 30 in the third main magnetic slot 61 are parallel to each other, so that the magnetic field distribution between the second main magnetic slot 51 and the third main magnetic slot 61 is more uniform.

[0083] According to some embodiments of the present disclosure, as shown in FIG. 3, in the arrangement direction from the third main magnetic slot 61 to the first main magnetic slot 21, the thickness of the magnet 30 increases. In this way, the magnetic field strength of the rotor core 10 can be gradually increased, thereby reducing the occurrence of demagnetization phenomenon.

[0084] According to some embodiments of the present disclosure, as shown in FIG. 1, in the first magnetic slot row 20, the second reinforcing ribs 70 are arranged between the first main magnetic slot 21 and the first auxiliary magnetic slot 22, and between the second main magnetic slot 51 and the second auxiliary magnetic slot 52.

[0085] The arrangement of the second reinforcing ribs 70 between the first main magnetic slot 21 and the first auxiliary magnetic slot 22 can improve the strength between the first main magnetic slot 21 and the first auxiliary magnetic slot 22. Similarly, the arrangement of the second reinforcing ribs 70 between the second main magnetic slot 51 and the second auxiliary magnetic slot 52 can improve the strength between the second main magnetic slot 51 and the second auxiliary magnetic slot 52.

[0086] According to some embodiments of the present disclosure, as shown in FIG. 2, the first magnetic slot row 20 is multiple, and the width of the second reinforcing rib 70 decreases in the direction arranged from the first magnetic slot row 20 to the multiple second magnetic slot rows 50.

[0087] Wherein, since the stress of the rotor is greater on the inner side in the radial direction, the width of the second reinforcing rib 70 is set to be wider, so as to further improve the strength of the rotor, and also make the rotor more stable during rotation. The width of the second reinforcing rib 70 gradually decreases in the direction arranged from the first magnetic slot row 20 to the multiple second magnetic slot rows 50, and the proportion satisfies And w1, w5 > R*1%. Wherein, W1 is the width of the second reinforcing rib 70 between the first auxiliary magnetic slot 22 and the first main magnetic slot 21, W2, W3 and W4 are the width of the second reinforcing rib 70 between the second auxiliary magnetic slot 52 and the second main magnetic slot 51, and the width of the second reinforcing rib 70 of W2, W3 and W4 decreases in turn, W5 is the width of the first reinforcing rib 40 between the first slot section 221 and the second slot section 222, so as to improve the strength of the rotor.

[0088] According to some embodiments of the present disclosure, the magnet 30 is a ferrite permanent magnet.

[0089] Wherein, compared with the rare earth permanent magnet used by the magnet 30, the ferrite permanent magnet has the advantages of high magnetic performance, good temperature stability, corrosion resistance, easy processing and low cost.

[0090] According to the motor 1000 of the second aspect of the present disclosure, it comprises the rotor 100 of the motor of the above-mentioned embodiments, as shown in FIG. 4.

[0091] According to the vehicle 2000 of the third aspect of the present disclosure, it comprises the motor 1000 of the above-mentioned embodiments, as shown in FIG. 5.

[0092] In the description of the present disclosure, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0093] In the description of the disclosure, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like 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 disclosure. In the description of the disclosure, the exemplary description of the above terms does not necessarily mean the same embodiment or example.

[0094] Although the embodiments of the disclosure have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the disclosure, and the scope of the disclosure is defined by the claims and their equivalents.

Claims

1. A rotor (100) of an electric machine, characterized in that The rotor core (10) is provided with a plurality of circumferentially distributed magnetic poles (101), the magnetic poles (101) include a plurality of radially spaced magnetic slot rows (11), a plurality of the magnetic slot rows (11) include a first magnetic slot row (20), the first magnetic slot row (20) includes a first main magnetic slot (21) and a first auxiliary magnetic slot (22), the first main magnetic slot (21) is respectively located on the opposite sides of the first auxiliary magnetic slot (22), the first auxiliary magnetic slot (22) includes a first slot section (221) and a second slot section (222), the first slot section (221) and the second slot section (222) have an included angle α between the length directions of the first slot section (221) and the second slot section (222); and A plurality of magnets (30) are respectively arranged in the first main magnetic slot (21), the first slot section (221) and the second slot section (222) and are spaced apart from each other. The center line of the first auxiliary magnetic slot (22) extends in the radial direction of the rotor core (10), and the first slot section (221) and the second slot section (222) are symmetrically distributed about the center line of the first auxiliary magnetic slot (22); and / or 2. The rotor (100) of the electric machine according to claim 1, characterized in that The included angle a satisfies the relationship: p is the pole pair number of the motor.

3. A rotor (100) of an electrical machine according to claim 1 or 2, characterized in that The first main magnetic slot (21) has an included angle β between opposite sides of the first auxiliary magnetic slot (22), and the included angle β satisfies the relationship: p is the pole pair number of the motor.

4. The rotor (100) of an electrical machine according to any one of claims 1-3, characterized in that, The first main magnetic slots (21) located on the opposite sides of the first auxiliary magnetic slot (22) are symmetrically distributed about the center line of the first auxiliary magnetic slot (22). The first magnetic slot row (20) is a plurality of, in the direction extending from the radially outer side to the radially inner side of the rotor core (10), the thickness of the magnet (30) in the first slot section (221) increases; and / or 5. The rotor (100) of an electrical machine according to any one of claims 1-4, characterized in that, In the direction extending from the radially outer side to the radially inner side of the rotor core (10), the thickness of the magnet (30) in the second slot section (222) increases. The first slot section (221) and the second slot section (222) in the first auxiliary magnetic slot (22) located at the radially innermost side of the rotor core (10) are provided with a first reinforcing rib (40).

6. The rotor (100) of the electric machine according to any of claims 1-5, characterized in that, A minimum value of thickness of the plurality of magnets (30) is H min , H min satisfies a relationship: n is the number of the magnetic slot rows (11), a minimum distance from an intersection of a center line of the first secondary magnetic slot (22) and an outer peripheral edge of the rotor core (10) to a radially extending edge of the magnetic pole (101) is L MN .

7. The rotor (100) of the electric machine according to any of claims 1-6, characterized in that, The interval between two adjacent rows (11) of the magnetic slots is W, and the minimum value of the thickness of the plurality of magnets (30) is H min , W and H min satisfy the relationship:

8. The rotor (100) of the electric machine according to any of claims 1-7, characterized in that, The thickness of the magnet (30) located in the first main magnetic slot (21) radially innermost of the rotor core (10) is H1, and the minimum value of the thickness of the plurality of magnets (30) is H min , H1 and H min satisfy the relationship: and / or The thickness of the magnet (30) located in the first sub-magnetic slot (22) on the radially innermost side of the rotor core (10) is H2, and the minimum value of the thickness of the plurality of magnets (30) is H min , H2 and H min satisfy the relationship:

9. The rotor (100) of the electric machine according to any of claims 1-8, characterized in that, The rotor core (10) is provided with a weight-reducing hole (12), the weight-reducing hole (12) is located on the outer side of the magnetic pole (101) in the radial direction of the rotor core (10).

10. The rotor (100) of the electric machine according to any of claims 1-9, characterized in that, In the direction extending from the radially inner side to the radially outer side of the rotor core (10), the minimum distance between the magnetic slot row (11) and the outer peripheral edge of the rotor core (10) increases.

11. The rotor (100) of the electric machine according to any of claims 1-10, characterized in that, The number of the magnetic slot rows (11) is n, n satisfies the relationship: 4≤n≤6.

12. The rotor (100) of the electric machine according to any of claims 1-11, characterized in that, The magnet (30) is a ferrite permanent magnet.

13. The rotor (100) of the electric machine according to any of claims 1-12, characterized in that, A plurality of the magnetic slot rows (11) further include 14. The rotor (100) of the electric machine according to any of claims 1-13, characterized in that, ​ A second magnetic slot row (50) is located radially outward of the first magnetic slot row (20), and includes a second main magnetic slot (51) and a second auxiliary magnetic slot (52), the second main magnetic slot (51) is located on opposite sides of the second auxiliary magnetic slot (52) respectively, the length direction of the second auxiliary magnetic slot (52) is perpendicular to the center line of the first auxiliary magnetic slot (22), and at least part of the magnets (30) are arranged in the second main magnetic slot (51) and the second auxiliary magnetic slot (52) respectively, the magnets (30) located in the first main magnetic slot (21) and the magnets (30) located in the second main magnetic slot (51) are parallel to each other.

15. The rotor (100) of the electric machine according to claim 14, characterized in that The plurality of magnetic slot rows (11) further comprise: A third magnetic slot row (60) is located radially outward of the second magnetic slot row (50), and includes two third main magnetic slots (61) which are communicated, and at least part of the magnets (30) are arranged in the third main magnetic slots (61) respectively, the magnets (30) located in the second main magnetic slot (51) and the magnets (30) located in the third main magnetic slot (61) are parallel to each other.

16. A rotor (100) of an electrical machine according to claim 15, characterized in that In the arrangement direction from the third main magnetic slot (61) to the first main magnetic slot (21), the thickness of the magnet (30) increases.

17. A rotor (100) of an electrical machine according to any one of claims 14-16, characterized in that In the first magnetic slot row (20), the first main magnetic slot (21) and the first auxiliary magnetic slot (22) are provided with a second reinforcing rib (70), and the second main magnetic slot (51) and the second auxiliary magnetic slot (52) are also provided with the second reinforcing rib (70).

18. The rotor (100) of the electric machine according to claim 17, characterized in that The first magnetic slot row (20) is a plurality of, and in the arrangement direction from the first magnetic slot row (20) to the plurality of second magnetic slot rows (50), the width of the second reinforcing rib (70) decreases.

19. An electric machine (1000), characterized in that Comprise: The rotor (100) of the electric machine according to any one of claims 1-18.

20. A vehicle (2000), characterized in that Comprise: The electric machine (1000) according to claim 19.

Images