Motor, compressor and vehicle

Abstract

The invention provides a motor, a compressor and a vehicle. The motor comprises a stator, the stator comprises a stator core, two adjacent stator teeth and a stator yoke enclose a stator slot, each stator tooth comprises a tooth body, the minimum value of the circumferential width of the tooth body is t, and the width of the notch of the stator slot in the circumferential direction of the stator is marked as k1; the included angle between the straight groove sections of the two magnet grooves is alpha, and the circumferential width of the straight groove sections is H; the plurality of magnetic adjusting groove groups are arranged on the iron core body, each magnetic adjusting groove group comprises a first magnetic adjusting groove and two second magnetic adjusting grooves, an included angle between groove walls, close to each other, of a connecting groove section of each first magnetic adjusting groove and a connecting groove section of each second magnetic adjusting groove is theta, and the width of each magnetic adjusting groove in the circumferential direction of the rotor is marked as k2; an air gap is enclosed between the stator and the rotor, and the minimum value of the air gap in the direction from the rotor to the stator is recorded as delta; wherein k1 * 0.25 < = 1.25 * alpha * k2 * delta / (theta * H) < = t.

Description

Technical Field

[0001] This application relates to the technical field of motors, and more specifically, to a motor, a compressor, and a vehicle. Background Art

[0002] With the rapid popularization of new energy vehicles, users' demands for the refrigeration and heating of automotive air conditioners in the cockpit are more urgent. The electric compressor operates driven by a permanent magnet motor inside, thus providing convenience for the driver to adjust the temperature inside the vehicle. In the related art, the vibration and noise of the permanent magnet motor during operation are relatively large, making it easy for the driver to perceive the vibration and noise inside the vehicle, seriously affecting driving comfort. Summary of the Invention

[0003] This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] To this end, a first aspect of this application proposes a motor.

[0005] A second aspect of this application proposes a compressor.

[0006] A third aspect of this application proposes a vehicle.

[0007] In view of this, a first aspect of the present application provides a motor, comprising: a stator, the stator includes a stator core, the stator core includes a plurality of stator teeth and a stator yoke, the stator teeth are connected to the inner peripheral wall of the stator yoke, the plurality of stator teeth are arranged at intervals around the axis of the stator core, the plurality of stator teeth enclose an installation cavity, an adjacent two stator teeth and the stator yoke enclose a stator slot, the stator tooth includes a tooth body, the minimum value of the circumferential width of the tooth body is t, and the width of the slot opening of the stator slot in the circumferential direction of the stator is denoted as k1; a rotor, rotatably arranged in the installation cavity, the rotor includes a rotor core, the rotor core includes: a core body; a shaft hole, arranged in the core body; a plurality of magnet slot groups, arranged in the core body, the plurality of magnet slot groups are arranged at intervals around the shaft hole, each magnet slot group includes two magnet slots, each magnet slot includes a first slot end close to the shaft hole, a second slot end far from the shaft hole and a straight slot section, the straight slot section is connected between the first slot end and the second slot end, the first slot ends of the two magnet slots are adjacent to each other, the second slot ends of the two magnet slots are far from each other, the included angle between the straight slot sections of the two magnet slots is α, and the circumferential width of the straight slot section is H; a plurality of magnetic flux adjusting slot groups, arranged in the core body, one magnetic flux adjusting slot group is arranged between each magnet slot group and the outer peripheral wall of the core body, each magnetic flux adjusting slot group includes a plurality of magnetic flux adjusting slots, the plurality of magnetic flux adjusting slots include a first magnetic flux adjusting slot and two second magnetic flux adjusting slots, the first magnetic flux adjusting slot is located between the two second magnetic flux adjusting slots, the first magnetic flux adjusting slot and the second magnetic flux adjusting slot both include a third slot end close to the shaft hole, a fourth slot end far from the shaft hole and a connecting slot section, the connecting slot section is connected between the third slot end and the fourth slot end, the third slot ends of the two second magnetic flux adjusting slots are far from each other, the fourth slot ends of the two second magnetic flux adjusting slots are close to each other, the included angle between the adjacent slot walls of the connecting slot section of the first magnetic flux adjusting slot and the connecting slot section of the second magnetic flux adjusting slot is θ, and the width of the magnetic flux adjusting slot in the circumferential direction of the rotor is denoted as k2; an air gap is enclosed between the stator and the rotor, and the minimum value of the air gap in the direction from the rotor to the stator is denoted as δ; wherein, k1×0.25≤1.25×α×k2×δ / (θ×H)≤t.

[0008] A motor provided by the present application includes a stator and a rotor.

[0009] The stator includes a stator core, the stator core includes a plurality of stator teeth and a stator yoke, each stator tooth includes a tooth body, and the minimum value of the circumferential width of the tooth body is denoted as t. An adjacent two stator teeth and the stator yoke enclose a stator slot, and the width of the slot opening of the stator slot in the circumferential direction of the stator is denoted as k1.

[0010] The rotor includes a rotor core, and the rotor core includes a core body, a shaft hole, a plurality of magnet slots groups, and a plurality of magnetic flux adjusting slots groups. The plurality of magnet slots groups are arranged at intervals around the shaft hole. Each magnet slots group includes two magnet slots, and each magnet slot includes a first slot end, a second slot end, and a straight slot section. The first slot end is closer to the shaft hole than the second slot end, that is to say, the first slot end is located between the shaft hole and the second slot end. One end of the straight slot section is connected to the first slot end, and the other end of the straight slot section is connected to the second slot end. The first slot ends of the two magnet slots are adjacent to each other, and the second slot ends of the two magnet slots are away from each other, that is, the two magnet slots are arranged in a "V" shape. The included angle between the straight slot sections of the two magnet slots in each magnet slots group is denoted as α, and the circumferential width of the straight slot section is denoted as H. Specifically, the slot wall of the straight slot section of the first magnet slot facing the straight slot section of the second magnet slot is denoted as the first slot wall, and the slot wall of the straight slot section of the second magnet slot facing the straight slot section of the first magnet slot is denoted as the second slot wall. The included angle between the first slot wall and the second slot wall is α, or the included angle between the plane where the first slot wall is located and the plane where the second slot wall is located is denoted as α. The width of the magnetic flux adjusting slot in the circumferential direction of the rotor is denoted as k2.

[0011] The plurality of magnetic flux adjusting slots groups are arranged at intervals around the shaft hole. One magnetic flux adjusting slots group is provided between each magnet slots group and the outer peripheral wall of the core body. Each magnetic flux adjusting slots group includes a plurality of magnetic flux adjusting slots, and the plurality of magnetic flux adjusting slots include a first magnetic flux adjusting slot and two second magnetic flux adjusting slots. The first magnetic flux adjusting slot is located between the two second magnetic flux adjusting slots. The first magnetic flux adjusting slot includes a third slot end, a connecting slot section, and a fourth slot end. The second magnetic flux adjusting slot includes a third slot end, a connecting slot section, and a fourth slot end. The third slot end is closer to the shaft hole than the fourth slot end, that is to say, the third slot end is located between the shaft hole and the fourth slot end. The third slot ends of the two second magnetic flux adjusting slots are away from each other, and the fourth slot ends of the two second magnetic flux adjusting slots are close to each other, that is, the two second magnetic flux adjusting slots are arranged in an "eight" shape. The included angle between the slot walls of the connecting slot section of the first magnetic flux adjusting slot and the connecting slot section of the second magnetic flux adjusting slot that are close to each other is θ. Specifically, the slot wall of the connecting slot section of the first magnetic flux adjusting slot facing the connecting slot section of the second magnetic flux adjusting slot is denoted as the third slot wall, and the slot wall of the connecting slot section of the second magnetic flux adjusting slot facing the connecting slot section of the first magnetic flux adjusting slot is denoted as the fourth slot wall. The included angle between the third slot wall and the fourth slot wall is denoted as θ. It can be understood that the included angle between the plane where the third slot wall is located and the plane where the fourth slot wall is located is θ.

[0012] An air gap is enclosed between the stator and the rotor, and the minimum value of the air gap in the direction from the rotor to the stator is denoted as δ.

[0013] It can be understood that the vibration noise of the motor is related to the radial electromagnetic force level and the torque ripple index. The magnetic modulation slot group has the function of changing the direction of magnetic force lines. By defining the relationships of α, θ, H, k1, k2, δ, and t to satisfy: k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t, in this way, the direction of magnetic force lines can be adjusted, the harmonics of the motor can be reduced, the leakage magnetic flux can be reduced, the torque ripple and the radial electromagnetic force can be weakened, thereby improving the vibration noise.

[0014] The radial electromagnetic force of the motor is an important index reflecting the vibration noise level of the motor. The magnitude of the radial electromagnetic force changes with space and time. The space electromagnetic force is described by order, and the time electromagnetic force is described by multiple frequency. In this application, by defining the relationships of α, θ, H, k1, k2, δ, and t, the radial electromagnetic forces corresponding to different space orders are reduced, and the radial electromagnetic forces corresponding to different time multiple frequencies are also reduced. In this way, the vibration noise during the operation of the motor can be effectively reduced, and the service performance and market competitiveness of the motor are improved.

[0015] According to the motor of the present application described above, the following additional technical features may also be provided:

[0016] In some embodiments, optionally, the first magnetic modulation slot is located on the magnetic pole center line of the iron core body, and the length of the first magnetic modulation slot is less than or equal to the length of the second magnetic modulation slot.

[0017] In this embodiment, the matching structure of the first magnetic modulation slot and the second magnetic modulation slot is further defined such that the first magnetic modulation slot is located on the magnetic pole center line of the iron core body, and the matching structure of the first magnetic modulation slot and the second magnetic modulation slot is defined such that the length of the first magnetic modulation slot is less than or equal to the length of the second magnetic modulation slot. That is to say, the length of the first magnetic modulation slot located on the magnetic pole center line is equal to the length of the second magnetic modulation slot located on one side of the magnetic pole center line, or the length of the first magnetic modulation slot located on the magnetic pole center line is shorter than the length of the second magnetic modulation slot located on one side of the magnetic pole center line. The first magnetic modulation slot and the two second magnetic modulation slots cooperate to adjust the direction of magnetic force lines of the motor, which is beneficial to reducing the leakage magnetic flux, improving the strength of the rotor, and improving the reliability of the motor during high-speed operation.

[0018] It can be understood that on the axial end face of the iron core body, the line connecting the center of the magnet slot group and the center of the shaft hole is the magnetic pole center line, abbreviated as the "d" axis. The first magnetic modulation slot is located on the magnetic pole center line, which can determine the position of the first magnetic modulation slot according to the center of the shaft hole and the center of the magnet slot group, providing an effective and reliable structural support for ensuring the controllability of the direction of magnetic force lines.

[0019] In some embodiments, optionally, the two second magnetic modulation slots of each magnetic modulation slot group are symmetrically arranged with respect to the magnetic pole center line.

[0020] In this embodiment, the mating structure of the two second magnetic modulation slots of each magnetic modulation slot group and the magnetic pole center line is further defined. The two second magnetic modulation slots of each magnetic modulation slot group are symmetrically arranged with respect to the magnetic pole center line. That is, the magnetic pole center line is located between the two second magnetic modulation slots, and the two second magnetic modulation slots are symmetrically arranged with respect to the magnetic pole center line.

[0021] By arranging two symmetrically arranged second magnetic modulation slots to adjust the distribution of magnetic flux lines, the symmetry and sinusoidality of the magnetic field arrangement of the motor can be improved, which is beneficial to reducing magnetic leakage, thereby reducing torque ripple during the operation of the motor and improving the vibration and noise during the operation of the motor.

[0022] At the same time, this setting can ensure the dynamic balance of the rotor during rotation, reduce the swing of the shafting structure of the compressor, and can effectively improve the content of each harmonic of the air-gap magnetic density of the motor. In this way, on the one hand, the stator iron loss of the motor is reduced, which is beneficial to improving the operating efficiency of the motor. On the other hand, the vibration and noise of the motor can be improved, and further the operating noise of the compressor can be reduced.

[0023] In some embodiments, optionally, in each magnetic modulation slot group, the multiple magnetic modulation slots further include: two third magnetic modulation slots. Each second magnetic modulation slot is located between the two third magnetic modulation slots. Each third magnetic modulation slot includes a third slot end, a fourth slot end, and a connecting slot section. The third slot ends of the two third magnetic modulation slots are away from each other, and the fourth slot ends of the two third magnetic modulation slots are close to each other.

[0024] In this embodiment, the structure of the magnetic modulation slot group is further defined such that in the magnetic modulation slot group, the multiple magnetic modulation slots further include two third magnetic modulation slots. Each second magnetic modulation slot is located between the two third magnetic modulation slots. That is, the first magnetic modulation slot and any one of the two second magnetic modulation slots are located between the two third magnetic modulation slots. Each third magnetic modulation slot includes a third slot end, a fourth slot end, and a connecting slot section. The third slot end is closer to the shaft hole than the fourth slot end. It can also be said that the third slot end is located between the shaft hole and the fourth slot end. The third slot ends of the two third magnetic modulation slots are away from each other, and the fourth slot ends of the two third magnetic modulation slots are close to each other. That is, the two third magnetic modulation slots are arranged in a "V" shape.

[0025] That is to say, along the circumferential direction of the rotor, the first magnetic modulation slot has a first side and a second side. One second magnetic modulation slot and one third magnetic modulation slot are located on the first side of the first magnetic modulation slot, and the other second magnetic modulation slot and the other third magnetic modulation slot are located on the second side of the first magnetic modulation slot.

[0026] This setting can adjust the direction of the magnetic flux lines, reduce the harmonics of the motor, reduce magnetic leakage, weaken torque ripple and radial electromagnetic force, thereby improving vibration and noise.

[0027] It can be understood that the width of the first magnetic adjustment groove in the circumferential direction of the rotor is denoted as k2, the width of the second magnetic adjustment groove in the circumferential direction of the rotor is denoted as k2, and the width of the third magnetic adjustment groove in the circumferential direction of the rotor is denoted as k2. Optionally, the widths of any two of the first magnetic adjustment groove, the second magnetic adjustment groove, and the third magnetic adjustment groove are equal in the circumferential direction of the rotor.

[0028] In some embodiments, optionally, two third magnetic adjustment grooves are symmetrically arranged with respect to the magnetic pole center line, and the second magnetic adjustment groove and the third magnetic adjustment groove located on the same side of the magnetic pole center line are arranged in parallel.

[0029] In this embodiment, the cooperation structure of the second magnetic adjustment groove and the third magnetic adjustment groove is further defined such that two third magnetic adjustment grooves are symmetrically arranged with respect to the magnetic pole center line, that is, the magnetic pole center line is located between the two third magnetic adjustment grooves, and the two third magnetic adjustment grooves are symmetrically arranged with respect to the magnetic pole center line.

[0030] Furthermore, the second magnetic adjustment groove and the third magnetic adjustment groove located on the same side of the magnetic pole center line are arranged in parallel. Specifically, one second magnetic adjustment groove and one third magnetic adjustment groove are located on the first side of the magnetic pole center line, and the second magnetic adjustment groove and the third magnetic adjustment groove are arranged in parallel. Another second magnetic adjustment groove and another third magnetic adjustment groove are located on the second side of the magnetic pole center line, and the second magnetic adjustment groove and the third magnetic adjustment groove are arranged in parallel.

[0031] By providing two symmetrically arranged second magnetic adjustment grooves and two symmetrically arranged third magnetic adjustment grooves, the distribution of magnetic force lines can be adjusted to improve the symmetry and sinusoidality of the magnetic field arrangement of the motor, which is beneficial to reducing magnetic leakage, thereby reducing torque ripple during the operation of the motor and improving the vibration and noise during the operation of the motor.

[0032] In some embodiments, optionally, the length of the third magnetic adjustment groove is less than the length of the second magnetic adjustment groove.

[0033] In this embodiment, the cooperation structure of the second magnetic adjustment groove and the third magnetic adjustment groove is further defined such that the length of the third magnetic adjustment groove is less than the length of the second magnetic adjustment groove. Since the first magnetic adjustment groove is located on the magnetic pole center line, along the direction from the first magnetic adjustment groove to the third magnetic adjustment groove, the distance from the magnet groove group to the outer peripheral wall of the iron core body gradually decreases, so that the length of the third magnetic adjustment groove is less than the length of the second magnetic adjustment groove, which can ensure that there is a distance between the third magnetic adjustment groove and the magnet groove group and can ensure that there is a distance between the third magnetic adjustment groove and the outer peripheral wall of the iron core body. In this way, both the structural strength of the rotor iron core can be ensured and the usage requirement of adjusting the direction of magnetic force lines can be met.

[0034] In some embodiments, optionally, θ and t satisfy: 0.5° / mm < θ / t < 3.6° / mm.

[0035] In this embodiment, the relationship between the included angle θ between the groove walls of the connection groove segments of the first magnetic modulation groove and the second magnetic modulation groove that are close to each other and the minimum value t of the circumferential width of the tooth body is further defined. This setting can weaken the back electromotive force harmonics of the motor, reduce the distortion rate of the back electromotive force of the motor, is beneficial to reducing the torque ripple of the motor, thereby reducing the vibration and noise of the motor, and is beneficial to improving the performance and market competitiveness of the compressor or vehicle using the motor.

[0036] It can be understood that the unit of θ is degree and the unit of t is millimeter.

[0037] In some embodiments, optionally, the motor further includes: a plurality of permanent magnets, with one permanent magnet arranged in each magnet slot, and the permanent magnet contains cerium with a mass percentage of X%, where 1% < X% < 5%.

[0038] In this embodiment, the structure of the motor is further defined such that the motor further includes a plurality of permanent magnets, with one permanent magnet arranged in each magnet slot. Among them, the permanent magnet contains cerium with a mass percentage of X%. Using a permanent magnet containing cerium as the magnetic pole can reduce the content of praseodymium and neodymium elements in the permanent magnet. In this way, the production cost of the permanent magnet can be reduced, and further the production cost of the motor can be reduced, solving the problem in the related art that the cost of the motor is high due to the high prices of rare earth materials such as praseodymium and neodymium.

[0039] By replacing the relatively expensive praseodymium and neodymium elements in the permanent magnet with cerium elements that are rich in content and relatively cheap in price, the price of the permanent magnet can be effectively reduced, and the cost performance of the motor can be improved.

[0040] In addition, the mass proportion of cerium element in the permanent magnet is greater than 1% and less than 5%. Adding cerium element to the permanent magnet can reduce the cost of the permanent magnet, thereby reducing the cost of the motor. However, the addition of cerium element will reduce the intrinsic coercivity of the permanent magnet and thus weaken the demagnetization resistance ability of the motor. When the mass proportion of cerium element is greater than 1% and less than 5%, the cost performance of the motor can be improved while meeting the requirements for the demagnetization resistance ability of the motor.

[0041] Optionally, X% = 1.5%, X% = 2%, X% = 2.5%, X% = 3%, X% = 3.5%, X% = 4%, X% = 4.5%, etc., which are not listed one by one here.

[0042] In some embodiments, optionally, the rotor core further includes: a plurality of riveting portions, which are arranged on the core body, and at least one riveting portion is arranged between each magnet slot group and the outer peripheral wall of the core body.

[0043] In this embodiment, the structure of the rotor core is further defined such that the rotor core further includes a plurality of riveting portions.

[0044] It can be understood that the rotor core includes a plurality of rotor laminations, and the plurality of rotor laminations are stacked. Along the axial direction of the rotor core, the shaft hole penetrates through the plurality of rotor laminations, each magnet slot group penetrates through the plurality of rotor laminations, and each magnetic flux adjusting slot group penetrates through the plurality of rotor laminations. Each rotor lamination is provided with a plurality of riveting portions.

[0045] The plurality of rotor laminations are stacked along the axial direction of the rotor core to form the rotor core. The riveting portions on two adjacent rotor laminations can cooperate with each other so that the plurality of rotor laminations are connected to each other axially, thereby forming the rotor core.

[0046] It can be understood that at least one riveting portion is provided between each magnet slot group and the outer peripheral wall of the iron core body. That is, the plurality of riveting portions are arranged at intervals around the shaft hole. This setting can ensure the balance and consistency of the forces at different positions of the rotor lamination. In this way, the overall external dimensions of the rotor core can be ensured, and the safety and reliability of product use can be improved.

[0047] In some embodiments, optionally, the riveting portion is located between the first magnetic flux adjusting slot and the second magnetic flux adjusting slot.

[0048] In this embodiment, the cooperation structure of the riveting portion, the first magnetic flux adjusting slot and the second magnetic flux adjusting slot is further defined, so that the riveting portion is located between the first magnetic flux adjusting slot and the second magnetic flux adjusting slot. That is, the riveting portion is located on one side of the magnetic pole center line, and the riveting portion is adjacent to the first magnetic flux adjusting slot. If the riveting portion is too close to the magnet slot group, for example, the riveting portion is arranged between the magnet slot group and the magnetic flux adjusting slot group, then during the high-speed stamping process of the rotor core mold, the magnet slot group will be deformed, resulting in a change in the size of the magnet slot group, so that the size of the magnet slot does not match the size of the permanent magnet. In this way, the process of assembling the permanent magnet into the magnet slot group will be affected. That is to say, the position setting of the riveting portion in this application can ensure the riveting reliability of the rotor core while improving the manufacturability, and can ensure the production efficiency and the yield rate of the product.

[0049] In some embodiments, optionally, the minimum value t of the circumferential width of the tooth body is greater than or equal to 7 mm and less than or equal to 9 mm.

[0050] In this embodiment, the structure of the stator tooth is further defined, so that the minimum value t of the circumferential width of the tooth body of the stator tooth is greater than or equal to 7 mm and less than or equal to 9 mm, that is, 7 mm ≤ t ≤ 9 mm. This setting can ensure the stiffness of the stator core and can take into account the safety, reliability, efficiency and load-carrying capacity of the motor during use.

[0051] Optionally, t = 7.5 mm, t = 8 mm, t = 8.5 mm, etc., and they are not listed one by one here.

[0052] Among them, if the minimum value t of the circumferential width of the tooth body is less than 7 mm, then the circumferential width of the tooth body of the stator core is too small, the magnetic field at the stator teeth is likely to saturate, and the motor will heat up severely under heavy load. Moreover, the too small circumferential width of the tooth body of the stator core will make the stiffness of the stator core poor and easily deteriorate the vibration and noise of the motor.

[0053] Among them, if the minimum value t of the circumferential width of the tooth body is greater than 9 mm, then the circumferential width of the tooth body of the stator core is too large. In this way, the area of the stator slots of the stator core will be reduced, and further, the efficiency and load-carrying capacity of the motor will be lowered.

[0054] In some embodiments, optionally, the distance between the magnetic modulation slot group and the outer peripheral wall of the iron core body is d1, and the minimum value of d1 is greater than or equal to 0.4 mm; the distance between the magnetic modulation slot group and the magnet slot group is d2, and the minimum value of d2 is greater than or equal to 0.4 mm.

[0055] In this embodiment, the cooperation structure of the magnetic modulation slot group and the iron core body is further defined, such that the distance between the magnetic modulation slot group and the outer peripheral wall of the iron core body is denoted as d1, where the minimum value of d1 is greater than or equal to 0.4 mm. This setting can ensure the manufacturability of the rotor core, make the strength of the rotor within a safe range, avoid deformation when the motor rotates at high speed, thereby avoiding the problem of large vibration and noise caused by uneven magnetic field distribution due to excessive deformation of the rotor, and is beneficial to improving the structural strength of the rotor.

[0056] In this embodiment, the cooperation structure of the magnetic modulation slot group and the magnet slot group is further defined, such that the distance between the magnetic modulation slot group and the magnet slot group is denoted as d2, where the minimum value of d2 is greater than or equal to 0.4 mm. This setting can ensure the manufacturability of the rotor core, make the strength of the rotor within a safe range, avoid deformation when the motor rotates at high speed, thereby avoiding the problem of large vibration and noise caused by uneven magnetic field distribution due to excessive deformation of the rotor, and is beneficial to improving the structural strength of the rotor.

[0057] The second aspect of the present invention provides a compressor, including: the motor as in the first aspect.

[0058] The compressor provided by the present invention includes the motor as in the first aspect, and thus has all the beneficial effects of the above motor, which will not be elaborated one by one here.

[0059] Optionally, the compressor includes an electric compressor. <s

[0060] The third aspect of the present invention provides a vehicle, including: the motor as in the first aspect; or the compressor as in the second aspect.

[0061] The vehicle provided by the present invention includes the motor as in the first aspect or the compressor as in the second aspect, and thus has all the beneficial effects of the above motor or compressor, which will not be elaborated one by one here.

[0062] It should be noted that the vehicle can be a new energy vehicle. New energy vehicles include battery electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0063] The additional aspects and advantages of the present application will become apparent in the following description section, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0065] Figure 1 A schematic structural diagram of a motor according to an embodiment of the present application is shown;

[0066] Figure 2 A schematic structural diagram of a rotor according to an embodiment of the present application is shown;

[0067] Figure 3 A schematic structural diagram of a rotor core according to an embodiment of the present application is shown;

[0068] Figure 4 A partial schematic structural diagram of a motor according to an embodiment of the present application is shown;

[0069] Figure 5 A magnetic field line distribution diagram when a motor in the related art is working is shown;

[0070] Figure 6 A magnetic field line distribution diagram when the motor in the present application is working is shown;

[0071] Figure 7 A comparison diagram of the spatial order radial electromagnetic forces of the motors in the related art and the present application is shown;

[0072] Figure 8 A comparison diagram of the harmonic radial electromagnetic forces of the motors in the related art and the present application is shown;

[0073] Figure 9 A comparison diagram of the torque ripples of the motors in the related art and the present application is shown;

[0074] Figure 10 A curve diagram of the change of the 16th harmonic radial electromagnetic force of the motors in the related art and the present application is shown;

[0075] Figure 11 A curve diagram of the change of the 32nd harmonic radial electromagnetic force of the motors in the related art and the present application is shown;

[0076] Figure 12Shows the curve of the 56 - times - frequency radial electromagnetic force of the motor in the related art and this application;

[0077] Figure 13 Shows the curve of the 64 - times - frequency radial electromagnetic force of the motor in the related art and this application;

[0078] Figure 14 Shows the curve of the back - EMF harmonic distortion rate of the motor in the related art and this application;

[0079] Figure 15 Shows the comparison chart of the proportion of the 5th - harmonic of the back - EMF of the motor in the related art and this application;

[0080] Figure 16 Shows the comparison chart of the proportion of the 7th - harmonic of the back - EMF of the motor in the related art and this application.

[0081] Among them, Figure 5 The corresponding relationship between the reference numerals and the component names in

[0082] 1'motor.

[0083] Figures 1 to 4 And Figure 6 The corresponding relationship between the reference numerals and the component names in

[0084] 1 motor, 10 stator, 100 stator core, 110 stator teeth, 112 tooth body, 114 tooth shoe, 116 stator yoke, 120 stator slots, 122 slot openings of the stator slots, 130 mounting cavity, 200 winding, 30 rotor, 300 rotor core, 310 core body, 320 shaft hole, 330 magnet slot group, 332 magnet slot, 333 first slot end, 334 second slot end, 335 straight slot section, 336 first slot wall, 337 second slot wall, 340 magnetic - field - adjusting slot group, 341 magnetic - field - adjusting slot, 342 first magnetic - field - adjusting slot, 344 second magnetic - field - adjusting slot, 346 third slot end, 348 fourth slot end, 350 connecting slot section, 352 third magnetic - field - adjusting slot, 354 third slot wall, 356 fourth slot wall, 360 magnetic - pole center line, 370 riveting part, 380 first through - hole, 390 second through - hole, 400 permanent magnet, 500 magnetic - pole part, 60 air gap. Detailed implementation manners

[0085] In order to be able to more clearly understand the above - mentioned objects, features, and advantages of this application, the following further describes this application in detail with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of this application and the features in the embodiments can be combined with each other.

[0086] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application may be practiced in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0087] The following refers to Figures 1 to 16 An electric motor 1, a compressor, and a vehicle according to some embodiments of the present application.

[0088] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, an electric motor 1 according to some embodiments of the present application includes a stator 10 and a rotor 30.

[0089] The stator 10 includes a stator core 100.

[0090] The stator core 100 includes a plurality of stator teeth 110 and a stator yoke 116. The stator teeth 110 are connected to the inner peripheral wall of the stator yoke 116. The plurality of stator teeth 110 are arranged at intervals around the axis of the stator core 100, and the plurality of stator teeth 110 enclose an installation cavity 130.

[0091] An adjacent two stator teeth 110 and the stator yoke 116 enclose a stator slot 120.

[0092] The stator tooth 110 includes a tooth body 112. The minimum value of the circumferential width of the tooth body 112 is t, and the width of the slot opening 122 of the stator slot in the circumferential direction of the stator 10 is denoted as k1.

[0093] The rotor 30 is rotatably disposed in the installation cavity 130. The rotor 30 includes a rotor core 300.

[0094] The rotor core 300 includes a core body 310, a shaft hole 320, a plurality of magnet slot groups 330, and a plurality of magnetic flux adjusting slot groups 340.

[0095] The shaft hole 320 is disposed in the core body 310.

[0096] The plurality of magnet slot groups 330 are disposed in the core body 310, and the plurality of magnet slot groups 330 are arranged at intervals around the shaft hole 320.

[0097] Each magnet slot group 330 includes two magnet slots 332.

[0098] Each magnet slot 332 includes a first slot end 333 close to the shaft hole 320, a second slot end 334 far from the shaft hole 320, and a straight slot section 335.

[0099] The straight slot section 335 is connected between the first slot end 333 and the second slot end 334.

[0100] The first slot ends 333 of the two magnet slots 332 are adjacent to each other, and the second slot ends 334 of the two magnet slots 332 are away from each other.

[0101] The included angle between the straight slot segments 335 of the two magnet slots 332 is α.

[0102] The circumferential width of the straight slot segment 335 is H.

[0103] A plurality of magnetic modulation slot groups 340 are provided on the iron core body 310, and one magnetic modulation slot group 340 is provided between each magnet slot group 330 and the outer peripheral wall of the iron core body 310.

[0104] Each magnetic modulation slot group 340 includes a plurality of magnetic modulation slots 341, and the plurality of magnetic modulation slots 341 include a first magnetic modulation slot 342 and two second magnetic modulation slots 344.

[0105] The first magnetic modulation slot 342 is located between the two second magnetic modulation slots 344.

[0106] Both the first magnetic modulation slot 342 and the second magnetic modulation slot 344 include a third slot end 346 close to the shaft hole 320, a fourth slot end 348 away from the shaft hole 320, and a connecting slot segment 350.

[0107] The connecting slot segment 350 is connected between the third slot end 346 and the fourth slot end 348.

[0108] The third slot ends 346 of the two second magnetic modulation slots 344 are away from each other.

[0109] The fourth slot ends 348 of the two second magnetic modulation slots 344 are close to each other.

[0110] The included angle between the groove walls of the connecting slot segment 350 of the first magnetic modulation slot 342 and the connecting slot segment 350 of the second magnetic modulation slot 344 that are close to each other is θ.

[0111] The width of the magnetic modulation slot 341 in the circumferential direction of the rotor 30 is denoted as k2.

[0112] An air gap 60 is enclosed between the stator 10 and the rotor 30, and the minimum value of the air gap 60 in the direction from the rotor 30 to the stator 10 is denoted as δ.

[0113] Wherein, k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t.

[0114] In this embodiment, the motor 1 includes a stator 10 and a rotor 30.

[0115] The stator 10 includes a stator iron core 100, and the stator iron core 100 includes a plurality of stator teeth 110 and a stator yoke 116. Each stator tooth 110 includes a tooth body 112, and the minimum value of the circumferential width of the tooth body 112 is denoted as t.

[0116] Two adjacent stator teeth 110 and a stator yoke 116 enclose a stator slot 120, and the width of the slot opening 122 of the stator slot in the circumferential direction of the stator 10 is denoted as k1.

[0117] The rotor 30 includes a rotor core 300, and the rotor core 300 includes a core body 310, a shaft hole 320, a plurality of magnet slot groups 330, and a plurality of magnetic flux regulating slot groups 340. The plurality of magnet slot groups 330 are arranged at intervals around the shaft hole 320. Each magnet slot group 330 includes two magnet slots 332. Each magnet slot 332 includes a first slot end 333, a second slot end 334, and a straight slot section 335. The first slot end 333 is closer to the shaft hole 320 than the second slot end 334. In other words, the first slot end 333 is located between the shaft hole 320 and the second slot end 334. One end of the straight slot section 335 is connected to the first slot end 333, and the other end of the straight slot section 335 is connected to the second slot end 334. The first slot ends 333 of the two magnet slots 332 are adjacent to each other, and the second slot ends 334 of the two magnet slots 332 are away from each other. That is, the two magnet slots 332 are arranged in a "V" shape. The included angle between the straight slot sections 335 of the two magnet slots 332 in each magnet slot group 330 is denoted as α, and the circumferential width of the straight slot section 335 is denoted as H.

[0118] Specifically, as Figure 3 shown, the slot wall of the straight slot section 335 of the first magnet slot 332 facing the straight slot section 335 of the second magnet slot 332 is denoted as a first slot wall 336, and the slot wall of the straight slot section 335 of the second magnet slot 332 facing the straight slot section 335 of the first magnet slot 332 is denoted as a second slot wall 337. The included angle between the first slot wall 336 and the second slot wall 337 is α. Or, the included angle between the plane where the first slot wall 336 is located and the plane where the second slot wall 337 is located is denoted as α. The width of the magnetic flux regulating slot 341 in the circumferential direction of the rotor 30 is denoted as k2.

[0119] A plurality of magnetic modulation slot groups 340 are arranged at intervals around the shaft hole 320. A magnetic modulation slot group 340 is provided between each magnet slot group 330 and the outer peripheral wall of the iron core body 310. Each magnetic modulation slot group 340 includes a plurality of magnetic modulation slots 341, and the plurality of magnetic modulation slots 341 include a first magnetic modulation slot 342 and two second magnetic modulation slots 344. The first magnetic modulation slot 342 is located between the two second magnetic modulation slots 344. The first magnetic modulation slot 342 includes a third slot end 346, a connecting slot section 350, and a fourth slot end 348. The second magnetic modulation slot 344 includes a third slot end 346, a connecting slot section 350, and a fourth slot end 348. The third slot end 346 is closer to the shaft hole 320 than the fourth slot end 348. That is to say, the third slot end 346 is located between the shaft hole 320 and the fourth slot end 348. The third slot ends 346 of the two second magnetic modulation slots 344 are away from each other, and the fourth slot ends 348 of the two second magnetic modulation slots 344 are close to each other. That is, the two second magnetic modulation slots 344 are arranged in a "V" shape. The included angle between the groove walls of the connecting groove section 350 of the first magnetic modulation slot 342 and the connecting groove section 350 of the second magnetic modulation slot 344 that are close to each other is θ.

[0120] Specifically, as Figure 3 shown, the groove wall of the connecting groove section 350 of the first magnetic modulation slot 342 facing the connecting groove section 350 of the second magnetic modulation slot 344 is denoted as the third groove wall 354, and the groove wall of the connecting groove section 350 of the second magnetic modulation slot 344 facing the connecting groove section 350 of the first magnetic modulation slot 342 is denoted as the fourth groove wall 356. The included angle between the third groove wall 354 and the fourth groove wall 356 is denoted as θ. It can be understood that the included angle between the plane where the third groove wall 354 is located and the plane where the fourth groove wall 356 is located is θ.

[0121] An air gap 60 is enclosed between the stator 10 and the rotor 30, and the minimum value of the air gap 60 in the direction from the rotor 30 to the stator 10 is denoted as δ.

[0122] It can be understood that the vibration and noise of the motor 1 are related to the radial electromagnetic force level and the torque ripple index. The magnetic modulation slot group 340 has the function of changing the direction of the magnetic force lines. By defining the relationship between α, θ, H, k1, k2, δ, and t to satisfy: k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t, in this way, the direction of the magnetic force lines can be adjusted, the harmonics of the motor 1 can be reduced, the magnetic leakage can be reduced, the torque ripple and the radial electromagnetic force can be weakened, thereby improving the vibration and noise.

[0123] The radial electromagnetic force of the motor 1 is an important indicator reflecting the vibration and noise level of the motor 1. The magnitude of the radial electromagnetic force varies with space and time. The space electromagnetic force is described by order, and the time electromagnetic force is described by multiple frequency. By defining the relationships among α, θ, H, k1, k2, δ, and t in this application, the radial electromagnetic forces corresponding to different space orders are reduced, and the radial electromagnetic forces corresponding to different time multiple frequencies are also reduced. In this way, the vibration and noise during the operation of the motor 1 can be effectively reduced, and the service performance and market competitiveness of the motor 1 are improved.

[0124] Optionally, the magnetic modulation slot group 340 includes an odd number of magnetic modulation slots.

[0125] Optionally, as Figure 1 shown, the stator tooth 110 further includes a tooth tip 114. The tooth body 112 extends along the radial direction of the stator core 100. The tooth tip 114 is connected to the tooth body 112, and the tooth tip 114 is located at the end face of the tooth body 112 facing the rotor 30.

[0126] In some embodiments, optionally, as Figure 1 、 Figure 2 and Figure 3 shown, the first magnetic modulation slot 342 is located on the magnetic pole center line 360 of the iron core body 310.

[0127] The length of the first magnetic modulation slot 342 is less than or equal to the length of the second magnetic modulation slot 344.

[0128] In this embodiment, the matching structure of the first magnetic modulation slot 342 and the second magnetic modulation slot 344 is further defined such that the first magnetic modulation slot 342 is located on the magnetic pole center line 360 of the iron core body 310, and the matching structure of the first magnetic modulation slot 342 and the second magnetic modulation slot 344 is defined such that the length L1 of the first magnetic modulation slot 342 is less than or equal to the length L2 of the second magnetic modulation slot 344. That is to say, the length of the first magnetic modulation slot 342 located on the magnetic pole center line 360 is equal to the length of the second magnetic modulation slot 344 located on one side of the magnetic pole center line 360, or the length of the first magnetic modulation slot 342 located on the magnetic pole center line 360 is shorter than the length of the second magnetic modulation slot 344 located on one side of the magnetic pole center line 360. The first magnetic modulation slot 342 and the two second magnetic modulation slots 344 cooperate to adjust the magnetic flux line direction of the motor 1, which is beneficial to reducing magnetic leakage, improving the strength of the rotor 30, and improving the reliability of the motor 1 during high-speed operation.

[0129] It can be understood that on the axial end face of the iron core body 310, the line connecting the center of the magnet slot group 330 and the center of the shaft hole 320 is the magnetic pole center line 360, simply referred to as the "d" axis. The first magnetic field adjusting slot 342 is located on the magnetic pole center line 360, and the position of the first magnetic field adjusting slot 342 can be determined based on the center of the shaft hole 320 and the center of the magnet slot group 330, providing an effective and reliable structural support for ensuring the controllability of the magnetic field line direction.

[0130] Optionally, the center of the first magnetic field adjusting slot 342 can be located on one side of the magnetic pole center line 360, or the center of the first magnetic field adjusting slot 342 is deflected by a preset angle relative to the magnetic pole center line 360.

[0131] Optionally, the number of the magnetic field adjusting slot groups 340 is multiple, and the number of the magnetic pole center lines 360 is multiple. The number of the magnetic field adjusting slot groups 340 corresponds to the number of the magnetic pole center lines 360. That is, the first magnetic field adjusting slot 342 in each magnetic field adjusting slot group 340 corresponds to one magnetic pole center line 360.

[0132] In some embodiments, optionally, the two second magnetic field adjusting slots 344 of each magnetic field adjusting slot group 340 are symmetrically arranged with respect to the magnetic pole center line 360.

[0133] In this embodiment, the cooperation structure of the two second magnetic field adjusting slots 344 of each magnetic field adjusting slot group 340 and the magnetic pole center line 360 is further defined. The two second magnetic field adjusting slots 344 of each magnetic field adjusting slot group 340 are symmetrically arranged with respect to the magnetic pole center line 360. That is, the magnetic pole center line 360 is located between the two second magnetic field adjusting slots 344, and the two second magnetic field adjusting slots 344 are symmetrically arranged with respect to the magnetic pole center line 360.

[0134] By setting the two symmetrically arranged second magnetic field adjusting slots 344 to adjust the distribution of the magnetic field lines, the symmetry and sinusoidality of the magnetic field arrangement of the motor 1 can be improved, which is beneficial to reducing the magnetic leakage, thereby reducing the torque ripple during the operation of the motor 1 and improving the vibration and noise during the operation of the motor 1.

[0135] At the same time, this setting can ensure the dynamic balance during the rotation of the rotor 30, reduce the swing of the shafting structure of the compressor, and effectively improve the content of each harmonic of the air-gap magnetic density of the motor 1. In this way, on the one hand, the iron loss of the stator 10 of the motor 1 is reduced, which is beneficial to improving the operation efficiency of the motor 1. On the other hand, the vibration and noise of the motor 1 can be improved, and further the operation noise of the compressor can be reduced.

[0136] In some embodiments, optionally, as Figure 1 and Figure 2 shown, in each magnetic field adjusting slot group 340, the multiple magnetic field adjusting slots 341 further include two third magnetic field adjusting slots 352.

[0137] Each second magnetic tuning slot 344 is located between two third magnetic tuning slots 352 .

[0138] Each third magnetic tuning slot 352 includes a third slot end 346 , a fourth slot end 348 , and a connecting slot segment 350 .

[0139] The third slot ends 346 of the two third magnetic tuning slots 352 are far away from each other.

[0140] The fourth slot ends 348 of the two third magnetic tuning slots 352 are close to each other.

[0141] In this embodiment, the structure of the magnetic tuning slot group 340 is further defined, such that the plurality of magnetic tuning slots 341 in the magnetic tuning slot group 340 further includes two third magnetic tuning slots 352. Each second magnetic tuning slot 344 is located between two third magnetic tuning slots 352. That is, the first magnetic tuning slot 342 and any of the two second magnetic tuning slots 344 are located between two third magnetic tuning slots 352. Each third magnetic tuning slot 352 includes a third slot end 346, a fourth slot end 348, and a connecting slot section 350. The third slot end 346 is closer to the shaft hole 320 than the fourth slot end 348. In other words, the third slot end 346 is located between the shaft hole 320 and the fourth slot end 348. The third slot ends 346 of the two third magnetic tuning slots 352 are spaced apart from each other, while the fourth slot ends 348 of the two third magnetic tuning slots 352 are close to each other. That is, the two third magnetic tuning slots 352 are arranged in an "eight" shape.

[0142] That is to say, along the circumference of the rotor 30, the first magnetic tuning slot 342 has a first side and a second side, a second magnetic tuning slot 344 and a third magnetic tuning slot 352 are located on the first side of the first magnetic tuning slot 342, and another second magnetic tuning slot 344 and another third magnetic tuning slot 352 are located on the second side of the first magnetic tuning slot 342.

[0143] This setting can adjust the direction of the magnetic lines of force, reduce the harmonics of the motor 1, reduce leakage flux, weaken torque pulsation and radial electromagnetic force, and thus improve vibration noise.

[0144] In some embodiments, optionally, the two third magnetic tuning slots 352 are symmetrically arranged with the magnetic pole center line 360 as the symmetry axis.

[0145] The second magnetic tuning slot 344 and the third magnetic tuning slot 352 are arranged in parallel on the same side of the magnetic pole center line 360 .

[0146] In this embodiment, the matching structure of the second magnetic tuning slot 344 and the third magnetic tuning slot 352 is further defined, so that the two third magnetic tuning slots 352 are symmetrically arranged with the magnetic pole center line 360 as the symmetry axis, that is, the magnetic pole center line 360 is located between the two third magnetic tuning slots 352, and the two third magnetic tuning slots 352 are symmetrically arranged with the magnetic pole center line 360 as the symmetry axis.

[0147] Further, the second magnetic modulation slots 344 and the third magnetic modulation slots 352 on the same side of the magnetic pole center line 360 are arranged in parallel. Specifically, one second magnetic modulation slot 344 and one third magnetic modulation slot 352 are located on the first side of the magnetic pole center line 360, and the second magnetic modulation slot 344 and the third magnetic modulation slot 352 are arranged in parallel. Another second magnetic modulation slot 344 and another third magnetic modulation slot 352 are located on the second side of the magnetic pole center line 360, and the second magnetic modulation slot 344 and the third magnetic modulation slot 352 are arranged in parallel.

[0148] By providing two symmetrically arranged second magnetic modulation slots 344 and two symmetrically arranged third magnetic modulation slots 352, the distribution of magnetic lines of force can be adjusted to enhance the symmetry and sinusoidality of the magnetic field arrangement of the motor 1, which is beneficial to reducing magnetic leakage, thereby reducing the torque ripple during the operation of the motor 1 and improving the vibration and noise during the operation of the motor 1.

[0149] In some other embodiments, each magnetic modulation slot group 340 further includes two fourth magnetic modulation slots, and the two fourth magnetic modulation slots are symmetrically arranged with respect to the magnetic pole center line 360. Among the second magnetic modulation slots 344, the third magnetic modulation slots 352, and the fourth magnetic modulation slots on the same side of the magnetic pole center line 360, the third magnetic modulation slot 352 is located between the second magnetic modulation slot 344 and the fourth magnetic modulation slot. By analogy, each magnetic modulation slot group 340 includes an odd number of magnetic modulation slots. Along the circumferential direction of the rotor 30, the first magnetic modulation slot 342 has a first side and a second side, and the number of magnetic modulation slots located on the first side of the first magnetic modulation slot 342 is equal to the number of magnetic modulation slots located on the second side of the first magnetic modulation slot 342. And any two magnetic modulation slots among the multiple magnetic modulation slots on the same side of the first magnetic modulation slot 342 are arranged in parallel.

[0150] In some embodiments, optionally, as Figure 3 shown, the length of the third magnetic modulation slot 352 is less than the length of the second magnetic modulation slot 344.

[0151] In this embodiment, the cooperation structure of the second magnetic modulation slot 344 and the third magnetic modulation slot 352 is further defined such that the length L3 of the third magnetic modulation slot 352 is less than the length L2 of the second magnetic modulation slot 344. Among them, the first magnetic modulation slot 342 is located on the magnetic pole center line 360. Therefore, along the direction from the first magnetic modulation slot 342 to the third magnetic modulation slot 352, the distance from the magnet slot group 330 to the outer peripheral wall of the iron core body 310 gradually decreases, making the length of the third magnetic modulation slot 352 less than the length of the second magnetic modulation slot 344, which can ensure that there is a distance between the third magnetic modulation slot 352 and the magnet slot group 330 and can ensure that there is a distance between the third magnetic modulation slot 352 and the outer peripheral wall of the iron core body 310. In this way, both the structural strength of the rotor iron core 300 can be ensured and the usage requirement of adjusting the direction of magnetic lines of force can be met.

[0152] In some embodiments, optionally, θ and t satisfy: 0.5° / mm < θ / t < 3.6° / mm.

[0153] In this embodiment, the relationship between the included angle θ between the groove walls of the connecting groove section 350 of the first magnetic modulation groove 342 and the connecting groove section 350 of the second magnetic modulation groove 344 that are close to each other and the minimum value t of the circumferential width of the tooth body 112 is further defined. This setting can weaken the back electromotive force harmonics of the motor 1, reduce the distortion rate of the back electromotive force of the motor 1, is beneficial to reducing the torque ripple of the motor 1, thereby reducing the vibration and noise of the motor 1, and is beneficial to improving the service performance and market competitiveness of the compressor or vehicle using the motor 1.

[0154] It can be understood that the unit of θ is degree and the unit of t is millimeter.

[0155] Optionally, θ / t = 1° / mm, θ / t = 1.5° / mm, θ / t = 2° / mm, θ / t = 2.5° / mm, θ / t = 3° / mm, θ / t = 3.5° / mm, etc., which are not listed one by one here.

[0156] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the motor 1 further includes a plurality of permanent magnets 400.

[0157] One permanent magnet 400 is disposed in each magnet slot 332.

[0158] The permanent magnet 400 contains cerium with a mass percentage of X%, where 1% < X% < 5%.

[0159] In this embodiment, the structure of the motor 1 is further defined such that the motor 1 further includes a plurality of permanent magnets 400, and one permanent magnet 400 is disposed in each magnet slot 332. Among them, the permanent magnet 400 contains cerium with a mass percentage of X%. Using the permanent magnet 400 containing cerium as the magnetic pole can reduce the content of praseodymium and neodymium elements in the permanent magnet 400. In this way, the production cost of the permanent magnet 400 can be reduced, and further the production cost of the motor 1 can be reduced, solving the problem in the related art that the cost of the motor is high due to the high prices of rare earth materials such as praseodymium and neodymium.

[0160] By replacing the relatively expensive praseodymium and neodymium elements in the permanent magnet 400 with cerium elements that are rich in content and relatively cheap in price, the price of the permanent magnet 400 can be effectively reduced, and the performance-price ratio of the motor 1 can be improved.

[0161] In addition, the mass proportion of cerium element in the permanent magnet 400 is greater than 1% and less than 5%. Adding cerium element to the permanent magnet 400 can reduce the cost of the permanent magnet 400, thereby reducing the cost of the motor 1. However, the addition of cerium element will reduce the intrinsic coercivity of the permanent magnet 400, thereby weakening the demagnetization resistance of the motor 1. When the mass proportion of cerium element is greater than 1% and less than 5%, the performance-price ratio of the motor 1 can be improved while meeting the demagnetization resistance requirement of the motor 1.

[0162] Optionally, X% = 1.5%, X% = 2%, X% = 2.5%, X% = 3%, X% = 3.5%, X% = 4%, and X% = 4.5%, etc., which are not listed one by one here.

[0163] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the rotor core 300 further includes a plurality of riveting portions 370.

[0164] A plurality of riveting portions 370 are provided on the iron core body 310, and at least one riveting portion 370 is provided between each magnet slot group 330 and the outer peripheral wall of the iron core body 310.

[0165] In this embodiment, the structure of the rotor core 300 is further defined such that the rotor core 300 further includes a plurality of riveting portions 370.

[0166] It can be understood that the rotor core 300 includes a plurality of rotor punching sheets, and the plurality of rotor punching sheets are stacked. Along the axial direction of the rotor core 300, the shaft hole 320 penetrates through the plurality of rotor punching sheets, each magnet slot group 330 penetrates through the plurality of rotor punching sheets, and each magnetic flux adjusting slot group 340 penetrates through the plurality of rotor punching sheets. Each rotor punching sheet is provided with a plurality of riveting portions 370.

[0167] The plurality of rotor punching sheets are stacked along the axial direction of the rotor core 300 to form the rotor core 300. The riveting portions 370 on two adjacent rotor punching sheets can cooperate with each other so that the plurality of rotor punching sheets are connected to each other axially, thereby forming the rotor core 300.

[0168] It can be understood that at least one riveting portion 370 is provided between each magnet slot group 330 and the outer peripheral wall of the iron core body 310, that is, a plurality of riveting portions 370 are arranged at intervals around the shaft hole 320. This setting can ensure the balance and consistency of the forces at different positions of the rotor punching sheets. In this way, the overall external dimensions of the rotor core 300 can be ensured, and the safety and reliability of product use can be improved.

[0169] In some other embodiments, a plurality of riveting portions 370 are further provided on the part of the iron core body 310 located between the shaft hole 320 and the magnet slot group 330.

[0170] In some embodiments, optionally, as Figure 1 and Figure 2 shown, the riveting buckle portion 370 is located between the first magnetic tuning groove 342 and the second magnetic tuning groove 344.

[0171] In this embodiment, the mating structure of the riveting buckle portion 370, the first magnetic tuning and the second magnetic tuning groove 344 is further defined such that the riveting buckle portion 370 is located between the first magnetic tuning groove 342 and the second magnetic tuning groove 344, that is, the riveting buckle portion 370 is located on one side of the magnetic pole center line 360, and the riveting buckle portion 370 is arranged adjacent to the first magnetic tuning groove 342. If the riveting buckle portion 370 is too close to the magnet groove group 330, for example, the riveting buckle portion 370 is arranged between the magnet groove group 330 and the magnetic tuning groove group 340, then, during the high-speed stamping of the mold of the rotor core 300, deformation will occur at the magnet groove group 330, resulting in a change in the size of the magnet groove group 330, making the size of the magnet groove 332 not match the size of the permanent magnet 400. In this way, the process of assembling the permanent magnet 400 into the magnet groove group 330 will be affected. That is to say, the position setting of the riveting buckle portion 370 in the present application can improve manufacturability while ensuring the riveting reliability of the rotor core 300, and can ensure the production efficiency and the yield rate of the product.

[0172] In some other embodiments, a riveting buckle portion 370 is provided between a part of the magnet groove groups 330 among the multiple magnet groove groups 330 and the outer peripheral wall of the iron core body 310, and no riveting buckle portion 370 is provided between the other part of the magnet groove groups 330 and the outer peripheral wall of the iron core body 310.

[0173] In still other embodiments, the portion of the iron core body 310 located between the shaft hole 320 and the magnet groove group 330 is further provided with a riveting buckle portion 370. This setting can increase the riveting area between two adjacent rotor 30 punching sheets, enable multiple rotor 30 punching sheets to be effectively assembled into a whole, avoid the situation of local warping of the rotor 30 punching sheets, and can ensure the overall outer dimension of the rotor core 300.

[0174] In some embodiments, optionally, as Figure 1 shown, the minimum value t of the circumferential width of the tooth body 112 is greater than or equal to 7 mm and less than or equal to 9 mm.

[0175] In this embodiment, the structure of the stator tooth 110 is further defined such that the minimum value t of the circumferential width of the tooth body 112 of the stator tooth 110 is greater than or equal to 7 mm and less than or equal to 9 mm, that is, 7 mm ≤ t ≤ 9 mm. This setting can ensure the stiffness of the stator core 100 and can take into account the safety, reliability, efficiency and load-carrying capacity of the motor 1 in use.

[0176] Optionally, t = 7.5 mm, t = 8 mm, t = 8.5 mm, etc., which are not listed one by one here.

[0177] Among them, if the minimum value t of the circumferential width of the tooth body 112 is less than 7 mm, then the circumferential width of the tooth body 112 of the stator core 100 is too small, the magnetic field at the stator tooth 110 is likely to saturate, and the motor 1 generates serious heat when operating under heavy load. Moreover, the too small circumferential width of the tooth body 112 of the stator core 100 will make the stiffness of the stator core 100 worse, and it is easy to deteriorate the vibration and noise of the motor 1.

[0178] Among them, if the minimum value t of the circumferential width of the tooth body 112 is greater than 9 mm, then the circumferential width of the tooth body 112 of the stator core 100 is too large. In this way, the area of the stator slot 120 of the stator core 100 will be reduced, and further, the efficiency and load-carrying capacity of the motor 1 will be decreased.

[0179] In some embodiments, optionally, as Figure 3 shown, the distance from the magnetic field adjusting slot group 340 to the outer peripheral wall of the iron core body 310 is d1.

[0180] The minimum value of d1 is greater than or equal to 0.4 mm.

[0181] The distance from the magnetic field adjusting slot group 340 to the magnet slot group 330 is d2.

[0182] The minimum value of d2 is greater than or equal to 0.4 mm.

[0183] In this embodiment, the matching structure of the magnetic field adjusting slot group 340 and the iron core body 310 is further limited, so that the distance from the magnetic field adjusting slot group 340 to the outer peripheral wall of the iron core body 310 is denoted as d1, where the minimum value of d1 is greater than or equal to 0.4 mm. This setting can ensure the manufacturability of the rotor core 300, make the strength of the rotor 30 within a safe range, avoid deformation when the motor 1 rotates at high speed, thereby avoiding the problem of large vibration and noise caused by uneven magnetic field distribution of the motor 1 due to excessive deformation of the rotor 30, and is beneficial to improving the structural strength of the rotor 30.

[0184] Optionally, the minimum value of d1 includes 0.5 mm, 0.6 mm, 0.7 mm, 0.9 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, etc., and will not be listed one by one here.

[0185] In addition, the matching structure of the magnetic field adjusting slot group 340 and the magnet slot group 330 is further limited, so that the distance from the magnetic field adjusting slot group 340 to the magnet slot group 330 is denoted as d2, where the minimum value of d2 is greater than or equal to 0.4 mm. This setting can ensure the manufacturability of the rotor core 300, make the strength of the rotor 30 within a safe range, avoid deformation when the motor 1 rotates at high speed, thereby avoiding the problem of large vibration and noise caused by uneven magnetic field distribution of the motor 1 due to excessive deformation of the rotor 30, and is beneficial to improving the structural strength of the rotor 30.

[0186] Optionally, the minimum value of d2 includes 0.5 mm, 0.6 mm, 0.7 mm, 0.9 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, etc., which are not listed one by one here.

[0187] A compressor according to some other embodiments of the present application includes: a motor 1 as in any of the above embodiments.

[0188] In this embodiment, the compressor includes a motor 1.

[0189] The motor 1 includes a stator 10 and a rotor 30.

[0190] The stator 10 includes a stator core 100, the stator core 100 includes a plurality of stator teeth 110, and each stator tooth 110 includes a tooth body 112. The minimum value of the circumferential width of the tooth body 112 is denoted as t.

[0191] The rotor 30 includes a rotor core 300, the rotor core 300 includes a core body 310, a shaft hole 320, a plurality of magnet slot groups 330, and a plurality of magnetic flux adjusting slot groups 340. The plurality of magnet slot groups 330 are arranged at intervals around the shaft hole 320. Each magnet slot group 330 includes two magnet slots 332, and each magnet slot 332 includes a first slot end 333, a second slot end 334, and a straight slot section 335. The first slot end 333 is closer to the shaft hole 320 than the second slot end 334. In other words, the first slot end 333 is located between the shaft hole 320 and the second slot end 334. One end of the straight slot section 335 is connected to the first slot end 333, and the other end of the straight slot section 335 is connected to the second slot end 334. The first slot ends 333 of the two magnet slots 332 are adjacent to each other, and the second slot ends 334 of the two magnet slots 332 are away from each other. That is, the two magnet slots 332 are arranged in a "V" shape. The included angle between the straight slot sections 335 of the two magnet slots 332 in each magnet slot group 330 is denoted as α, and the circumferential width of the straight slot section 335 is denoted as H.

[0192] Specifically, as Figure 3 shown, the slot wall of the straight slot section 335 of the first magnet slot 332 facing the straight slot section 335 of the second magnet slot 332 is denoted as the first slot wall 336, and the slot wall of the straight slot section 335 of the second magnet slot 332 facing the straight slot section 335 of the first magnet slot 332 is denoted as the second slot wall 337. The included angle between the first slot wall 336 and the second slot wall 337 is α. Or, the included angle between the plane where the first slot wall 336 is located and the plane where the second slot wall 337 is located is denoted as α.

[0193] A plurality of magnetic modulation slot groups 340 are arranged at intervals around the shaft hole 320. A magnetic modulation slot group 340 is provided between each magnet slot group 330 and the outer peripheral wall of the iron core body 310. Each magnetic modulation slot group 340 includes a first magnetic modulation slot 342 and two second magnetic modulation slots 344. The first magnetic modulation slot 342 is located between the two second magnetic modulation slots 344. The first magnetic modulation slot 342 includes a third slot end 346, a connecting slot section 350, and a fourth slot end 348. The second magnetic modulation slot 344 includes a third slot end 346, a connecting slot section 350, and a fourth slot end 348. The third slot end 346 is closer to the shaft hole 320 than the fourth slot end 348. That is to say, the third slot end 346 is located between the shaft hole 320 and the fourth slot end 348. The third slot ends 346 of the two second magnetic modulation slots 344 are away from each other, and the fourth slot ends 348 of the two second magnetic modulation slots 344 are close to each other. That is, the two second magnetic modulation slots 344 are arranged in a "V" shape. The included angle between the slot walls of the connecting slot section 350 of the first magnetic modulation slot 342 and the connecting slot section 350 of the second magnetic modulation slot 344 that are close to each other is θ.

[0194] Specifically, as Figure 3 shown, the slot wall of the connecting slot section 350 of the first magnetic modulation slot 342 facing the connecting slot section 350 of the second magnetic modulation slot 344 is denoted as the third slot wall 354, and the slot wall of the connecting slot section 350 of the second magnetic modulation slot 344 facing the connecting slot section 350 of the first magnetic modulation slot 342 is denoted as the fourth slot wall 356. The included angle between the third slot wall 354 and the fourth slot wall 356 is denoted as θ. It can be understood that the included angle between the plane where the third slot wall 354 is located and the plane where the fourth slot wall 356 is located is θ.

[0195] It can be understood that the vibration noise of the motor 1 is related to the radial electromagnetic force level and the torque ripple index. The magnetic modulation slot group 340 has the function of changing the direction of the magnetic force line. By defining the relationship between α, θ, H, and t to satisfy: k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t, in this way, the direction of the magnetic force line can be adjusted, the harmonics of the motor 1 can be reduced, the magnetic leakage can be reduced, the torque ripple and the radial electromagnetic force can be weakened, thereby improving the vibration noise.

[0196] The radial electromagnetic force of the motor 1 is an important index reflecting the vibration noise level of the motor 1. The magnitude of the radial electromagnetic force changes with space and time. The space electromagnetic force is described by order, and the time electromagnetic force is described by multiple frequency. In this application, by defining the relationship between α, θ, H, and t, the radial electromagnetic forces corresponding to different space orders are reduced, and the radial electromagnetic forces corresponding to different time multiple frequencies are also reduced. In this way, the vibration noise during the operation of the motor 1 can be effectively reduced, and the service performance and market competitiveness of the motor 1 are improved.

[0197] A vehicle according to some other embodiments of the present application includes: the motor 1 as described in any of the above embodiments; or a compressor as described in the above embodiments.

[0198] In this embodiment, the vehicle includes a motor 1 or a compressor. The compressor includes a motor 1.

[0199] The motor 1 includes a stator 10 and a rotor 30.

[0200] The stator 10 includes a stator core 100, the stator core 100 includes a plurality of stator teeth 110, and each stator tooth 110 includes a tooth body 112. The minimum value of the circumferential width of the tooth body 112 is denoted as t.

[0201] The rotor 30 includes a rotor core 300, the rotor core 300 includes a core body 310, a shaft hole 320, a plurality of magnet slot groups 330, and a plurality of magnetic flux adjusting slot groups 340. The plurality of magnet slot groups 330 are arranged at intervals around the shaft hole 320. Each magnet slot group 330 includes two magnet slots 332, and each magnet slot 332 includes a first slot end 333, a second slot end 334, and a straight slot section 335. The first slot end 333 is closer to the shaft hole 320 than the second slot end 334. In other words, the first slot end 333 is located between the shaft hole 320 and the second slot end 334. One end of the straight slot section 335 is connected to the first slot end 333, and the other end of the straight slot section 335 is connected to the second slot end 334. The first slot ends 333 of the two magnet slots 332 are adjacent to each other, and the second slot ends 334 of the two magnet slots 332 are away from each other. That is, the two magnet slots 332 are arranged in a "V" shape. The included angle between the straight slot sections 335 of the two magnet slots 332 in each magnet slot group 330 is denoted as α, and the circumferential width of the straight slot section 335 is denoted as H.

[0202] Specifically, as Figure 3 shown, the slot wall of the straight slot section 335 of the first magnet slot 332 facing the straight slot section 335 of the second magnet slot 332 is denoted as the first slot wall 336, and the slot wall of the straight slot section 335 of the second magnet slot 332 facing the straight slot section 335 of the first magnet slot 332 is denoted as the second slot wall 337. The included angle between the first slot wall 336 and the second slot wall 337 is α. Or rather, the included angle between the plane where the first slot wall 336 is located and the plane where the second slot wall 337 is located is denoted as α.

[0203] A plurality of magnetic modulation slot groups 340 are arranged at intervals around the shaft hole 320. A magnetic modulation slot group 340 is provided between each magnet slot group 330 and the outer peripheral wall of the iron core body 310. Each magnetic modulation slot group 340 includes a first magnetic modulation slot 342 and two second magnetic modulation slots 344. The first magnetic modulation slot 342 is located between the two second magnetic modulation slots 344. The first magnetic modulation slot 342 includes a third slot end 346, a connecting slot section 350, and a fourth slot end 348. The second magnetic modulation slot 344 includes a third slot end 346, a connecting slot section 350, and a fourth slot end 348. The third slot end 346 is closer to the shaft hole 320 than the fourth slot end 348. That is to say, the third slot end 346 is located between the shaft hole 320 and the fourth slot end 348. The third slot ends 346 of the two second magnetic modulation slots 344 are away from each other, and the fourth slot ends 348 of the two second magnetic modulation slots 344 are close to each other. That is, the two second magnetic modulation slots 344 are arranged in a "V" shape. The included angle between the groove walls of the connecting slot section 350 of the first magnetic modulation slot 342 and the connecting slot section 350 of the second magnetic modulation slot 344 that are close to each other is θ.

[0204] Specifically, as Figure 3 shown, the groove wall of the connecting slot section 350 of the first magnetic modulation slot 342 facing the connecting slot section 350 of the second magnetic modulation slot 344 is denoted as the third groove wall 354, and the groove wall of the connecting slot section 350 of the second magnetic modulation slot 344 facing the connecting slot section 350 of the first magnetic modulation slot 342 is denoted as the fourth groove wall 356. The included angle between the third groove wall 354 and the fourth groove wall 356 is denoted as θ. It can be understood that the included angle between the plane where the third groove wall 354 is located and the plane where the fourth groove wall 356 is located is θ.

[0205] It can be understood that the vibration noise of the motor 1 is related to the radial electromagnetic force level and the torque ripple index. The magnetic modulation slot group 340 has the function of changing the direction of the magnetic force lines. By defining the relationship between α, θ, H, and t to satisfy: k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t, in this way, the direction of the magnetic force lines can be adjusted, the harmonics of the motor 1 can be reduced, the magnetic leakage can be reduced, the torque ripple and the radial electromagnetic force can be weakened, thereby improving the vibration noise.

[0206] The radial electromagnetic force of the motor 1 is an important index reflecting the vibration noise level of the motor 1. The magnitude of the radial electromagnetic force changes with space and time. The space electromagnetic force is described by the order, and the time electromagnetic force is described by the multiple frequency. In this application, by defining the relationship between α, θ, H, and t, the radial electromagnetic force corresponding to different space orders is reduced, and the radial electromagnetic force corresponding to different time multiple frequencies is also reduced. In this way, the vibration noise during the operation of the motor 1 can be effectively reduced, and the service performance and market competitiveness of the motor 1 are improved.

[0207] It should be noted that in the original text, it is incorrect to say that "the two second magnetic modulation slots 344 are arranged in an 'eight' shape". According to the description of the distance relationship between the third slot end and the fourth slot end of the two second magnetic modulation slots, it should be an inverted "V" shape, so the translation is adjusted accordingly.It should be noted that the vehicle can be a new energy vehicle. New energy vehicles include pure electric vehicles, range-extended electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0208] Optionally, as Figure 2 shown, the rotor core 300 is provided with a first through hole 380 and a second through hole 390. At least one of the first through hole 380 and the second through hole 390 can be used as a weight-reducing hole. At least one of the first through hole 380 and the second through hole 390 can be used as a current-carrying hole. The through holes penetrate the rotor core 300.

[0209] Optionally, as Figure 1 shown, the stator core 100 is provided with stator slots 120.

[0210] Optionally, as Figure 1 and Figure 2 shown, the motor 1 includes a permanent magnet motor 1. The permanent magnet motor 1 includes a stator 10 and a rotor 30. The stator 10 includes a stator core 100 and windings 200 (i.e., enameled wires). The rotor 30 includes a rotor core 300 and a plurality of permanent magnets 400. The rotor core 300 includes a core body 310, a plurality of magnet slot groups 330, a plurality of magnetic flux adjusting slot groups 340, a rotating shaft, a first through hole 380, and a second through hole 390. Enameled wires are placed in the stator slots 120, and the enameled wires are wound around the stator teeth 110 of the stator core 100. The plurality of magnet slot groups 330 are evenly distributed along the circumferential direction of the shaft hole 320, and each magnet slot group 330 includes two magnet slots 332. Each permanent magnet 400 is placed in a magnet slot 332. The permanent magnet 400 contains cerium elements. A magnetic pole portion 500 is formed between the outer edge of the core body 310 and the magnet slot group 330, and the magnetic pole portion 500 is provided with a magnetic flux adjusting slot group 340. The magnetic flux adjusting slot group 340 includes five magnetic flux adjusting slots. k1×0.25≤1.25×α×k2×δ / (θ×H)≤t, where the angle between the straight slot sections 335 of the two magnet slots 332 is α, the angle between the connecting slot sections 350 of the first magnetic flux adjusting slot 342 and the connecting slot sections 350 of the second magnetic flux adjusting slot 344 that are close to each other is θ, the circumferential width of the straight slot section 335 is H, and the minimum value of the circumferential width of the tooth body 112 is t.

[0211] The first magnetic flux adjusting slot 342 is arranged on the magnetic pole center line 360, and the length of the first magnetic flux adjusting slot 342 is not greater than the length of the adjacent second magnetic flux adjusting slot 344. This setting can adjust the direction of the magnetic force lines of the motor 1, reduce magnetic leakage, improve the strength of the rotor 30, and is beneficial to improving the reliability of the motor 1 during high-speed operation.

[0212] The second magnetic modulation slot 344 and the third magnetic modulation slot 352 on the same side of the first magnetic modulation slot 342 are parallel to each other. The two second magnetic modulation slots 344 are symmetrically arranged with respect to the magnetic pole center line 360, and the two third magnetic modulation slots 352 are symmetrically arranged with respect to the magnetic pole center line 360. Through the symmetrical arrangement of the magnetic modulation slots, the distribution of magnetic lines of force can be adjusted, the symmetry and sinusoidality of the magnetic field of the motor 1 can be improved, and the magnetic leakage can be reduced.

[0213] θ, t, and H satisfy: 0.5° / mm < θ / t < 3.6° / mm. This setting can weaken the back electromotive force harmonics of the motor 1, reduce the distortion rate of the back electromotive force of the motor 1, which is beneficial to reducing the torque ripple of the motor 1, and thus reducing the vibration and noise of the motor 1.

[0214] The mass proportion of cerium element in the permanent magnet 400 is greater than 1% and less than 5%. Adding cerium element to the permanent magnet 400 can reduce the use of rare earth materials with higher prices in the permanent magnet 400, thereby reducing the cost of the motor 1. However, the addition of cerium element will reduce the intrinsic coercivity of the permanent magnet 400, thereby weakening the demagnetization resistance ability of the motor 1. When the mass proportion of cerium element is greater than 1% and less than 5%, the performance-price ratio of the motor 1 can be improved while meeting the requirements of the demagnetization resistance ability of the motor 1.

[0215] The magnetic pole part 500 of the rotor core 300 is provided with a riveting part 370. The riveting part 370 is arranged on one side of the magnetic pole center line 360 and is adjacent to the first magnetic modulation slot 342. If the riveting part 370 is too close to the magnet slot group 330, for example, the riveting part 370 is arranged below the first magnetic modulation slot 342, during the high-pressure punching process of the rotor core 300 mold, the magnet slot group 330 will be deformed, thus affecting the smoothness of assembling the permanent magnet 400 into the magnet slot group 330. The position setting of the riveting part 370 in this application can improve the manufacturability while ensuring the riveting reliability of the rotor core 300.

[0216] The minimum value t of the circumferential width of the tooth body 112 of the stator tooth 110 satisfies: 7mm ≤ t ≤ 9mm. If the circumferential width of the tooth body 112 is too small, the magnetic field at the stator tooth 110 is likely to be saturated, and the motor 1 will generate serious heat during heavy load, and the small circumferential width of the tooth body 112 will also make the stiffness of the stator core 100 poor, which is likely to deteriorate the vibration and noise of the motor 1. If the circumferential width of the tooth body 112 is too large, the area of the stator slot 120 will be correspondingly reduced, which will reduce the efficiency and load-carrying capacity of the motor 1.

[0217] The minimum distance between the magnetic modulation slot group 340 and the outer edge of the iron core body 310 is not less than 0.4mm. The minimum distance between the magnetic modulation slot group 340 and the magnet slot group 330 is not less than 0.4mm.

[0218] This application can weaken the vibration and noise of the motor 1 and meet the usage requirements of the high-speed and reliable operation of the motor 1.

[0219] This application will be described by taking a 12-slot 8-pole motor 1 as an example.

[0220] As Figure 5 shown, there is no magnetic flux regulating slot group provided on the rotor core in the related art. And the mating structures of the magnetic flux regulating slot group, the magnet slot group, the shaft hole, the core body, and the stator are not defined. As Figure 5 and Figure 6 shown, the magnetic flux direction at the position of the magnetic flux regulating slot group 340 of the motor 1 in this application has changed, which will reduce the harmonics of the motor 1, weaken the torque ripple and the radial electromagnetic force, thereby improving the vibration and noise.

[0221] The radial electromagnetic force of the motor 1 is an important index reflecting the vibration and noise level of the motor 1. The magnitude of the radial electromagnetic force changes with space and time. In this application, the space electromagnetic force is described by order, and the time electromagnetic force is described by multiple frequency. As Figure 7 shown, the space order of the radial electromagnetic force of the motor 1 in this application is significantly lower than that of the motor 1' in the related art. Since the smaller the space order of the radial electromagnetic force, the greater the influence on the vibration and noise, therefore, the numerical values of the 4th-order and 8th-order radial electromagnetic forces are mainly concerned. As can be seen from Figure 7 , according to the solution of this application, compared with the motor 1' in the related art, the 4th-order and 8th-order space radial electromagnetic forces are reduced by 24.4% and 14.2% respectively, which is beneficial to improving the vibration and noise of the motor 1.

[0222] As Figure 8 shown, compared with the solution in the related art, the 16th multiple frequency, 32nd multiple frequency, 56th multiple frequency, and 64th multiple frequency radial electromagnetic forces of the motor 1 proposed in this invention are reduced by 58.4%, 25.4%, 89.5%, and 10.7% respectively, and the high-frequency electromagnetic force level is significantly suppressed, thereby reducing the high-frequency vibration and noise of the motor 1.

[0223] As Figure 9 shown, compared with the motor 1' in the related art, the peak value of the torque ripple of the motor 1 in this application is reduced by 15.0% under the same load condition. Among them, the 24th multiple frequency torque component is reduced by 16.9%, which can significantly reduce the vibration and noise of the motor 1.

[0224] As Figure 10 , Figure 11 , Figure 12 and Figure 13 shown, when k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t is satisfied, the radial electromagnetic force of this application is less than that in the related art and is at a relatively low level, which can reduce the vibration and noise of the motor 1.

[0225] Optionally, when 1 ≤ 1.25×α×k2×δ / (θ×H) ≤ 9, the radial electromagnetic force of the present application is less than that in the related art and is at a relatively low level, which can reduce the vibration and noise of the motor 1.

[0226] As Figure 14 shown, 0.5° / mm < θ / t < 3.6° / mm. Specifically, taking H = 1.8 mm as an example, the back electromotive force distortion rate of the motor 1 is lower than that of the motor 1' in the related art and is at a relatively low level, and the sinusoidality of the back electromotive force is better, which is beneficial to improving the vibration and noise.

[0227] Optionally, the ratio of θ / t is related to H. For example, the ratio of θ / t is related to the value of 1.6×H.

[0228] As Figure 15 and Figure 16 shown, the 5th and 7th harmonics of the back electromotive force of the motor 1 of the present application are significantly reduced, which is beneficial to reducing the torque ripple and the vibration and noise of the motor 1.

[0229] That is to say, the present application can weaken the radial electromagnetic force and torque ripple of the motor 1 and significantly reduce the vibration and noise of the motor 1.

[0230] In the present application, the term "a plurality of" means two or more unless otherwise clearly defined. Terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0231] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like mean 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 present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor, characterized in that, Comprising: A stator, the stator includes a stator core, the stator core includes a plurality of stator teeth and a stator yoke, the stator teeth are connected to the inner peripheral wall of the stator yoke, the plurality of stator teeth are arranged at intervals around the axis of the stator core, and the plurality of stator teeth enclose an installation cavity. An adjacent two of the stator teeth and the stator yoke enclose a stator slot. The stator tooth includes a tooth body, the minimum value of the circumferential width of the tooth body is t, and the width of the slot opening of the stator slot in the circumferential direction of the stator is denoted as k1; A rotor, rotatably arranged in the installation cavity, the rotor includes a rotor core, and the rotor core includes: A core body; A shaft hole, arranged in the core body; A plurality of magnet slot groups, arranged in the core body, the plurality of magnet slot groups are arranged at intervals around the shaft hole, each magnet slot group includes two magnet slots, and each magnet slot includes a first slot end close to the shaft hole, a second slot end far from the shaft hole, and a straight slot section. The straight slot section is connected between the first slot end and the second slot end. The first slot ends of the two magnet slots are adjacent to each other, the second slot ends of the two magnet slots are far from each other, the included angle between the straight slot sections of the two magnet slots is α, and the circumferential width of the straight slot section is H; A plurality of magnetic flux adjusting slot groups, arranged in the core body, and one magnetic flux adjusting slot group is arranged between each magnet slot group and the outer peripheral wall of the core body. Each magnetic flux adjusting slot group includes a plurality of magnetic flux adjusting slots, and the plurality of magnetic flux adjusting slots include a first magnetic flux adjusting slot and two second magnetic flux adjusting slots. The first magnetic flux adjusting slot is located between the two second magnetic flux adjusting slots. The first magnetic flux adjusting slot and the second magnetic flux adjusting slot both include a third slot end close to the shaft hole, a fourth slot end far from the shaft hole, and a connecting slot section. The connecting slot section is connected between the third slot end and the fourth slot end. The third slot ends of the two second magnetic flux adjusting slots are far from each other, the fourth slot ends of the two second magnetic flux adjusting slots are close to each other, and the included angle between the adjacent slot walls of the connecting slot section of the first magnetic flux adjusting slot and the connecting slot section of the second magnetic flux adjusting slot is θ. The width of the magnetic flux adjusting slot in the circumferential direction of the rotor is denoted as k2; An air gap is enclosed between the stator and the rotor, and the minimum value of the air gap in the direction from the rotor to the stator is denoted as δ; Wherein, k1×0.25 ≤ 1.25×α×k2×δ / (θ×H) ≤ t.

2. The motor according to claim 1, characterized in that The first magnetic flux adjusting slot is located on the magnetic pole center line of the core body, and the length of the first magnetic flux adjusting slot is less than or equal to the length of the second magnetic flux adjusting slot.

3. The motor according to claim 2, characterized in that The two second magnetic flux adjusting slots of each magnetic flux adjusting slot group are symmetrically arranged with respect to the magnetic pole center line.

4. The electric machine according to any one of claims 1 to 3, characterized in that The rotor core further includes: A plurality of riveting parts, arranged in the core body, and at least one riveting part is arranged between each magnet slot group and the outer peripheral wall of the core body.

5. The motor according to claim 4, characterized in that, The riveting part is located between the first magnetic flux adjusting slot and the second magnetic flux adjusting slot.

6. The motor according to claim 2 or 3, characterized in that, In each magnetic flux adjusting slot group, the plurality of magnetic flux adjusting slots further include: Two third magnetic adjustment slots, each of the second magnetic adjustment slots is located between the two third magnetic adjustment slots, each of the third magnetic adjustment slots includes the third slot end, the fourth slot end and the connecting slot section, the third slot ends of the two third magnetic adjustment slots are away from each other, and the fourth slot ends of the two third magnetic adjustment slots are close to each other.

7. The motor according to claim 6, characterized in that, The two third magnetic adjustment slots are symmetrically arranged with respect to the magnetic pole center line as the axis of symmetry, and the second magnetic adjustment slot and the third magnetic adjustment slot located on the same side of the magnetic pole center line are arranged in parallel.

8. The motor according to claim 6, characterized in that, The length of the third magnetic adjustment slot is less than the length of the second magnetic adjustment slot.

9. The electric machine according to any one of claims 1 to 3, characterized in that θ and t satisfy: 0.5° / mm < θ / t < 3.6° / mm.

10. The electric machine according to any one of claims 1 to 3, characterized in that, Further comprising: A plurality of permanent magnets, each of the magnet slots is provided with one of the permanent magnets, and the permanent magnet contains cerium with a mass percentage of X%, wherein, 1% < X% < 5%.

11. The electric machine according to any one of claims 1 to 3, characterized in that, The minimum value t of the circumferential width of the tooth body is greater than or equal to 7 mm and less than or equal to 9 mm.

12. The electric machine according to any one of claims 1 to 3, characterized in that The distance between the magnetic adjustment slot group and the outer peripheral wall of the iron core body is d1, and the minimum value of d1 is greater than or equal to 0.4 mm; The distance between the magnetic adjustment slot group and the magnet slot group is d2, and the minimum value of d2 is greater than or equal to 0.4 mm.

13. A compressor, characterized in that, Comprising: The motor according to any one of claims 1 to 12.

14. A vehicle, characterized in that, Comprising: The motor according to any one of claims 1 to 12; Or The compressor according to claim 13.

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