Stator, motor, compressor and vehicle

Abstract

The invention provides a stator, a motor, a compressor and a vehicle. The stator comprises a stator core, the stator core comprises a stator yoke and a plurality of stator teeth, two adjacent stator teeth and the stator yoke enclose a stator slot, and the stator core is provided with an axial first end and an axial second end; the first insulating frame is arranged at the first end; the first insulating frame is arranged at the first end, the second insulating frame is arranged at the second end, any one of the first insulating frame and the second insulating frame comprises a plurality of insulating teeth, each stator tooth is connected with one insulating tooth, the insulating tooth of at least one of the first insulating frame and the second insulating frame is provided with an extending part, and the extending part is positioned at the notch of the stator slot; the slot insulation paper is arranged in the stator slot, the slot insulation paper abuts against the extension part, and the extension part at least can limit the slot insulation paper in the radial direction of the stator iron core; wherein along the circumferential direction of the stator core, the gap value between the extension parts of the two adjacent insulating teeth is recorded as d01, the notch width of the stator slot is recorded as T, and d01 is less than T.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and in particular, to a stator, a motor, a compressor and a vehicle. Background Art

[0002] In the related art, a permanent magnet synchronous motor includes a stator core and slot insulation paper. The stator core is provided with stator slots, and the slot insulation paper is arranged in the stator slots. In order to avoid problems such as bulges in the slot insulation paper, the slot width of the stator slot in the circumferential direction of the stator core is relatively small. As a result, the leakage flux is relatively large, resulting in a relatively small output torque of the motor and poor performance of the motor. Summary of the invention

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

[0004] To this end, a first aspect of the present application proposes a stator.

[0005] A second aspect of the present application provides an electric motor.

[0006] A third aspect of the present application provides a compressor.

[0007] A fourth aspect of the present application provides a vehicle.

[0008] In view of this, the first aspect of the present application proposes a stator, comprising: a stator core, the stator core comprising a stator yoke and a plurality of stator teeth, each stator tooth is connected to the inner circumferential wall of the stator yoke, the plurality of stator teeth are arranged at intervals around the axis of the stator core, two adjacent stator teeth and the stator yoke enclose a stator slot, and the stator core has a first axial end and a second axial end; a first insulating frame, arranged at the first end; a second insulating frame, arranged at the second end, either the first insulating frame or the second insulating frame comprising a plurality of insulating teeth, each stator tooth is connected to an insulating tooth, and the insulating teeth of at least one of the first insulating frame and the second insulating frame are provided with an extension portion, and the extension portion is located at the slot opening of the stator slot; slot insulating paper, arranged in the stator slot, and the slot insulating paper abuts against the extension portion, and the extension portion can at least limit the slot insulating paper in the radial direction of the stator core; wherein, along the circumferential direction of the stator core, the gap value of the extension portions of two adjacent insulating teeth is denoted as d01, and the slot opening width of the stator slot is denoted as T, wherein d01<T.

[0009] A stator provided in the present application includes a stator core, a first insulation frame, a second insulation frame and slot insulation paper.

[0010] The stator core includes a stator yoke and stator teeth, the number of stator teeth is multiple, any stator tooth among the multiple stator teeth is connected to the inner peripheral wall of the stator yoke, the multiple stator teeth are arranged at intervals around the axis of the stator core, and two adjacent stator teeth and the stator yoke enclose a stator slot. The stator core has a first end and a second end, and the first end of the stator core and the second end of the stator core are opposite and arranged at intervals along the axial direction of the stator core.

[0011] The first insulating frame is disposed at the first end of the stator core, and the second insulating frame is disposed at the second end of the stator core. Either the first insulating frame or the second insulating frame includes a plurality of insulating teeth, that is, the first insulating frame includes a plurality of insulating teeth, the second insulating frame includes a plurality of insulating teeth, and each stator tooth is connected to an insulating tooth of the first insulating frame and an insulating tooth of the second insulating frame.

[0012] The insulating teeth of the first insulating frame are provided with extension parts, or the insulating teeth of the second insulating frame are provided with extension parts, or both the insulating teeth of the first insulating frame and the insulating teeth of the second insulating frame are provided with extension parts.

[0013] After the first insulating frame, the second insulating frame, the slot insulating paper and the stator core are assembled, the slot insulating paper is arranged in the stator slot, the extension part extends into the slot opening of the stator slot, and the slot insulating paper abuts against the extension part. The extension part can at least limit the slot insulating paper in the radial direction of the stator core to ensure the matching size of the slot insulating paper and the stator slot.

[0014] The matching structure of the first insulating frame, the second insulating frame and the stator core is reasonably set, so that the gap value of the extension of the two adjacent insulating teeth in the circumferential direction of the stator core is recorded as d01, and the slot width of the stator slot in the circumferential direction of the stator core is recorded as T, and the relationship between d01 and T is limited to satisfy d01<T. In other words, the extension located at the slot of the stator slot and the slot wall of the stator slot cooperate to limit the slot insulation paper together. Since the gap between the extension of the two adjacent insulating teeth in the circumferential direction of the stator core is small, the extension located at the slot of the stator slot can effectively block the slot insulation paper, avoid the slot insulation paper protruding from the inner diameter of the stator core, and avoid the occurrence of undesirable problems such as the inner convexity of the slot insulation paper. And due to the existence of the extension, the slot width of the stator slot in the circumferential direction of the stator core can be appropriately increased. This setting can reduce magnetic leakage, improve the output torque of the motor, improve the high-frequency overload capacity of the motor, and is conducive to improving the performance of the motor and the reliability of the motor. In other words, the slot wall and the extension part of the stator slot cooperate with each other, taking into account the leakage magnetic field of the motor and blocking the inner bulge of the slot insulation paper, which can not only improve the power density of the motor, but also ensure the safety and reliability of the motor.

[0015] It is understandable that at least one of the first insulating frame and the second insulating frame is provided with an extension, that is, at least one of the first insulating frame and the second insulating frame serves as a mounting carrier of the extension, has the function of mounting and fixing the extension, and can ensure the matching size of the extension, the notch of the stator slot and the slot insulating paper. In other words, the existing structure of the first insulating frame and the second insulating frame is reasonably utilized, and the role of the insulating frame provided with the extension is enriched, so that the insulating frame provided with the extension has both an insulating effect and a function of preventing the slot insulating paper from convexing inwardly. And this setting also provides structural support for increasing the notch of the stator slot, and can reduce magnetic leakage and improve the high-frequency overload capacity of the motor while ensuring the matching size of the slot insulating paper and the stator core.

[0016] According to the above-mentioned stator of the present application, the following additional technical features may also be provided:

[0017] In some embodiments, optionally, the extension portion is connected to a slot wall of the stator slot.

[0018] In this embodiment, the matching structure of the extension part and the stator slot is further defined, so that the extension part is connected to the slot wall of the stator slot. That is, the extension part is located at the notch of the stator slot, and the extension part and the slot wall of the stator slot are connected to each other. This arrangement enables the extension part and the slot wall of the stator slot to be connected as a whole. In this way, it is possible to effectively prevent the slot insulation paper from protruding from the gap between the slot wall of the stator slot and the extension part, providing effective and reliable structural support to ensure the safety and reliability of the motor.

[0019] In some embodiments, optionally, the insulating tooth provided with an extension portion includes a tooth body, the tooth body is provided with a slot, and the end of the stator tooth is inserted into the slot; the extension portion is connected to the end face of the tooth body facing the axis of the stator core, and the extension portion includes two extension sections, and the two extension sections are arranged at intervals in the circumferential direction of the stator core, each extension section extends into the slot mouth of a stator slot, and each extension section abuts against the slot insulation paper.

[0020] In this embodiment, the structures of the first insulating frame and the second insulating frame are further defined so that the insulating tooth provided with an extension portion includes a tooth body, the tooth body is provided with a slot, and the end of the stator tooth is inserted into the slot. This arrangement is beneficial to increasing the matching area of ​​the first insulating frame, the second insulating frame and the stator core, and can ensure the stability and reliability of the assembly of the first insulating frame, the second insulating frame and the stator core.

[0021] Wherein, the extension portion includes two extension sections, and the two extension sections are arranged at intervals along the circumference of the stator core, and any one of the two extension sections is connected to the end face of the tooth body facing the axis of the stator core. And each extension section extends into the notch of a stator slot, that is, the two extension sections of the extension section extend into the notches of two stator slots respectively. In other words, the notch of a stator slot is provided with two extension sections, or the notch of a stator slot is provided with four extension sections. This setting can increase the abutment area of ​​the extension section and the slot insulation paper, and ensure the balance and consistency of the extension section and the slot insulation paper, avoiding the situation that the slot insulation paper is easily convex due to the abutment of one side of the circumference of the slot insulation paper with the extension section, and the separation of the other side of the circumference of the slot insulation paper from the extension section.

[0022] In addition, the extension part is connected to the end face of the tooth body facing the axis of the stator core. This arrangement can not only meet the use requirement of the extension part being located at the slot opening of the stator slot, but also reduce the occupancy rate of the extension part on the internal space of the stator slot.

[0023] In some embodiments, optionally, when the insulating teeth of either the first insulating frame or the second insulating frame are provided with an extension portion, along the circumference of the stator core, a gap value of the extension portions of two adjacent insulating teeth of the first insulating frame is equal to a gap value of the extension portions of two adjacent insulating teeth of the second insulating frame.

[0024] In this embodiment, the structures of the first insulating frame and the second insulating frame are further defined, and when the insulating teeth of the first insulating frame are provided with extensions, and the insulating teeth of the second insulating frame are provided with extensions, along the circumferential direction of the stator core, the gap value of the extensions of two adjacent insulating teeth of the first insulating frame is equal to the gap value of the extensions of two adjacent insulating teeth of the second insulating frame. In this way, the processing difficulty of the first insulating frame and the second insulating frame is reduced, production is facilitated, processing efficiency is improved, and production cost of the product is reduced.

[0025] In addition, this structural arrangement can ensure the balance and consistency of the abutment area between the extension portion of the first insulating frame and the extension portion of the second insulating frame and the slot insulating paper, which is beneficial to improving the effectiveness and feasibility of preventing the slot insulating paper from bulging inwardly.

[0026] In some embodiments, optionally, the stator core includes: a first punching sheet group; a second punching sheet group, wherein the second punching sheet group is stacked on one side of the first punching sheet group along the axial direction of the stator core, and the second punching sheet group is closer to the end of the stator core than the first punching sheet group, and either the first punching sheet group or the second punching sheet group includes: an annular yoke, wherein the stator yoke includes an annular yoke; a plurality of tooth portions, wherein the tooth portions are connected to the inner circumferential wall of the annular yoke, wherein each stator tooth includes a tooth portion, and the end face of the tooth portion facing the axis of the stator core is a tooth face; and along the circumferential direction of the stator core, a gap value between two adjacent tooth faces of the first punching sheet group is different from a gap value between two adjacent tooth faces of the second punching sheet group.

[0027] In this embodiment, the stator core includes a first punching sheet group and a second punching sheet group.

[0028] The first punching sheet group and the second punching sheet group are arranged along the axial direction of the stator core. Specifically, along the axial direction of the stator core, the second punching sheet group is stacked on one side of the first punching sheet group.

[0029] The first punching sheet group includes an annular yoke and multiple teeth. Any one of the multiple teeth is connected to the inner circumferential wall of the annular yoke. The multiple teeth are arranged at intervals around the axis of the stator core. The stator yoke includes an annular yoke, and each stator tooth includes a tooth.

[0030] The second punching sheet group includes an annular yoke and multiple tooth portions, any one of the multiple tooth portions is connected to the inner circumferential wall of the annular yoke, and the multiple tooth portions are arranged at intervals around the axis of the stator core. The stator yoke includes an annular yoke, and each stator tooth includes a tooth portion.

[0031] The structures of the first punching sheet group and the second punching sheet group are defined so that along the circumferential direction of the stator core, the gap value between two adjacent tooth surfaces of the first punching sheet group is different from the gap value between two adjacent tooth surfaces of the second punching sheet group.

[0032] It is understandable that, when the load is symmetrical, the effect of the armature magnetomotive force on the fundamental wave of the main pole magnetic field is the armature reaction. The armature reaction will affect the performance of the motor. The present application reasonably sets the structure of the stator so that the first punching sheet group and the second punching sheet group are set with different slot widths in the circumferential direction of the stator core. In this way, the armature reaction of the motor can be improved, the voltage of the armature reaction of the motor can be reduced, and the torque output of the motor under high-speed conditions can be improved.

[0033] It can be understood that along the circumference of the stator core, the punching sheet group with a smaller gap value between two adjacent tooth surfaces has the function of blocking the stator winding and slot insulation paper, and the punching sheet group with a larger gap value between two adjacent tooth surfaces has the function of reducing magnetic leakage and increasing the output torque of the motor. In other words, this setting takes into account both the magnetic leakage of the motor and the blocking of the stator winding and slot insulation paper protruding from the inner diameter of the stator core, which is conducive to improving the safety and reliability of the motor.

[0034] In some embodiments, optionally, along the circumference of the stator core, the gap value between two adjacent tooth surfaces of the first punching sheet group is recorded as d1, and the gap value between two adjacent tooth surfaces of the second punching sheet group is recorded as d2, wherein d2>d1≥d01.

[0035] In this embodiment, the structure of the stator core is further defined, so that the gap value between two adjacent tooth surfaces of the first punching sheet group in the circumferential direction of the stator core is recorded as d1, and the gap value between two adjacent tooth surfaces of the second punching sheet group in the circumferential direction of the stator core is recorded as d2, and the relationship between d1, d2 and d01 is defined so as to satisfy d2>d1≥d01. That is, the stator core includes a punching sheet group with different slot widths of the stator slot, and the smaller value d1 of the slot width is greater than or equal to the gap value d01 of the extension of two adjacent insulating teeth. The first punching sheet group and the extension can effectively block the slot insulation paper and prevent the slot insulation paper from protruding from the inner diameter of the stator core. The second punching sheet group and the first punching sheet group can reduce magnetic leakage, improve the output torque of the motor, and improve the high-frequency overload capacity of the motor, which is beneficial to improving the performance of the motor and the reliability of the motor.

[0036] It can be understood that the second punching sheet group is closer to the end of the stator core than the first punching sheet group, that is, the distance from the second punching sheet group to the end of the stator core is smaller than the distance from the first punching sheet group to the end of the stator core, that is, along the circumference of the stator core, the punching sheet group with a smaller slot width is closer to the middle of the stator core. In this way, the slot insulation paper of the stator can be effectively blocked to avoid the situation where the slot insulation paper protrudes from the inner diameter of the stator core, which can improve the reliability of the motor.

[0037] In some embodiments, optionally, d1 and d2 satisfy: 1.5<d2 / d1<3.

[0038] In this embodiment, the matching structure of the first punching sheet group and the second punching sheet group is further defined so that the width d1 of the stator slot of the first punching sheet group in the circumferential direction of the stator core and the width d2 of the stator slot of the second punching sheet group in the circumferential direction of the stator core satisfy: 1.5<d2 / d1<3, that is, the armature reaction of the motor can be improved, the voltage of the armature reaction of the motor can be reduced, and the torque output of the motor under high-speed conditions can be improved.

[0039] If d2 / d1 is less than or equal to 1.5, the difference between the slot width of the first punching sheet group in the circumferential direction of the stator core and the slot width of the second punching sheet group in the circumferential direction of the stator core is small, that is, the slot width of the first punching sheet group in the circumferential direction of the stator core is closer to the slot width of the second punching sheet group in the circumferential direction of the stator core. In this way, the effect of alleviating the armature reaction is poor, and the effect of improving the torque output of the motor under high-speed conditions is poor.

[0040] If d2 / d1 is greater than or equal to 3, the width of the stator slot of the second punching sheet group in the circumferential direction of the stator core is too large, so that the winding wound on the teeth of the first punching sheet group and the second punching sheet group cannot be effectively blocked, and the winding is easily separated from the teeth, and the stability and reliability of the electronic movement cannot be guaranteed. In addition, this setting will increase the gap between the stator and rotor of the motor, which will affect the power density of the motor and the torque output of the motor.

[0041] In some embodiments, optionally, the stator core also includes: a third punching sheet group, the second punching sheet group is located between the first punching sheet group and the third punching sheet group; the third punching sheet group includes an annular yoke and a plurality of tooth portions, and along the circumference of the stator core, the gap value between two adjacent tooth surfaces of the third punching sheet group is recorded as d3, wherein d3>d2.

[0042] In this embodiment, the structure of the stator core is further defined so that the stator core also includes a third punching sheet group. Along the axial direction of the stator core, the second punching sheet group is located between the first punching sheet group and the third punching sheet group. In other words, the third punching sheet group is located at the end of the stator core.

[0043] The third punching plate group includes an annular yoke and a plurality of teeth, any one of which is connected to the inner peripheral wall of the annular yoke, and the plurality of teeth are arranged at intervals around the axis of the stator core. The stator yoke includes an annular yoke, and each stator tooth includes a tooth.

[0044] The structures of the first punching sheet group, the second punching sheet group and the third punching sheet group are defined, so that the width of the notch of the stator slot of the first punching sheet group in the circumferential direction of the stator core is recorded as d1, the width of the notch of the stator slot of the second punching sheet group in the circumferential direction of the stator core is recorded as d2, and the width of the notch of the stator slot of the third punching sheet group in the circumferential direction of the stator core is recorded as d3, and the relationship between d1, d2 and d3 is defined so as to satisfy: d3>d2>d1. That is to say, along the axial direction of the stator core, the notch width of the first punching sheet group, the second punching sheet group and the third punching sheet group in the circumferential direction of the stator core gradually increases, and this setting can reduce magnetic leakage and improve the output torque of the motor. In other words, the first punching sheet group, the second punching sheet group and the third punching sheet group are set with different notch widths in the circumferential direction of the stator core, so that the armature reaction of the motor can be improved, the voltage of the armature reaction of the motor can be reduced, and the torque output of the motor under high-speed conditions can be improved.

[0045] It can be understood that the first punching sheet group with a smaller slot width in the circumferential direction of the stator core is located in the middle of the stator core, and the third punching sheet group with a larger slot width in the circumferential direction of the stator core is located at the end of the stator core. In this way, the problem of the stator slot insulation protruding from the inner diameter of the stator core can be effectively prevented, thereby improving the reliability of the motor.

[0046] In other words, this arrangement takes into account both the leakage flux of the motor and the blocking of the stator slot insulation from protruding from the inner diameter of the stator core, which is beneficial to improving the safety and reliability of the motor.

[0047] In some embodiments, optionally, the number of first punching sheet groups is denoted as m, the number of second punching sheet groups is denoted as n, a first punching sheet group is arranged between any two adjacent second punching sheet groups, m≥1, n≥2; the axial height of the first punching sheet group is denoted as h1, and the axial height of the second punching sheet group is denoted as h2, wherein 0.05<(m×h1) / (n×h2)<0.2.

[0048] In this embodiment, the structure of the first punching sheet group and the second punching sheet group is defined, so that the number of the first punching sheet group is recorded as m, the number of the second punching sheet group is recorded as n, m≥1, n≥2. It is also defined that a first punching sheet group is provided between any two adjacent second punching sheet groups. That is, the axial end surface of the first punching sheet group is provided with a second punching sheet group.

[0049] This arrangement can meet the use requirements of setting different slot widths of the first punching sheet group and the second punching sheet group in the circumferential direction of the stator core, and make the number of the first punching sheet group smaller than the number of the second punching sheet group. In this way, the slot insulation of the stator can be effectively prevented from protruding from the inner diameter of the stator core, which can improve the reliability of the motor and help reduce the material input of the stator core, thereby helping to reduce the weight of the stator core and reduce the production cost of the stator core.

[0050] It is understandable that if the slot width of the punching sheet group in the circumferential direction of the stator core is small, the magnetic flux leakage will increase significantly, thus reducing the output torque of the motor. Therefore, the number of the first punching sheet group is smaller than the number of the second punching sheet group, so as to take into account the magnetic flux leakage of the motor and prevent the stator slot insulation from protruding from the inner diameter of the stator core, which is conducive to improving the safety and reliability of the motor.

[0051] And define the relationship between h1, h2, m and n to satisfy: 0.05<(m×h1) / (n×h2)<0.2. That is to say, define the relationship between the sum of the axial heights of all the first punching sheet groups included in the stator core and the sum of the axial heights of all the second punching sheet groups included in the stator core. Because reducing the slot width of the second punching sheet group in the circumferential direction of the stator core will increase the risk of stator leakage, therefore, by defining the optimal ratio of the axial heights of the first punching sheet group and the second punching sheet group, the risk of leakage can be minimized, that is, the leakage can be reduced while ensuring the performance of the motor.

[0052] In some embodiments, optionally, the distance from the stator teeth to the axis of the stator core is recorded as D1, and the distance from the outer peripheral wall of the stator yoke to the axis of the stator core is recorded as D2, wherein 0.6≤D1 / D2≤0.7.

[0053] In this embodiment, the structure of the stator core is further defined, so that the distance from the stator teeth to the axis of the stator core is recorded as D1, and the distance from the outer peripheral wall of the stator yoke to the axis of the stator core is recorded as D2, that is, the inner diameter of the stator core is recorded as D1, and the outer diameter of the stator core is recorded as D2. And D1 and D2 satisfy 0.6≤D1 / D2≤0.7.

[0054] This setting limits the matching dimensions of the inner diameter and outer diameter of the stator core. By optimizing the split ratio of the motor, the main magnetic field provided by the permanent magnet of the motor can be increased. Under the condition of the same back electromotive force, the number of turns of the stator winding can be reduced, the anti-demagnetization ability of the motor can be improved, and the safety and reliability of the motor can be further ensured.

[0055] When the inner diameter of the stator core is increased, the outer diameter of the stator core is also increased, so that the amount of magnets used can be increased and the power density of the motor can be improved.

[0056] If D1 / D2 is greater than 0.7, the area of ​​the stator slots of the stator will be reduced, causing the stator teeth and yoke magnetic flux to be saturated, and the armature magnetic flux to be sharply reduced, resulting in deterioration of the output power of the motor.

[0057] Specifically, when the ratio of D1 to D2 is within the above range, the efficiency of the motor is higher and the copper loss of the motor is lower, that is, the efficiency, copper loss and iron loss of the motor are taken into consideration.

[0058] A second aspect of the present application provides a motor, comprising: a stator as in the first aspect, wherein a plurality of stator teeth enclose an assembly cavity; and a rotor, wherein the rotor is rotatably disposed in the assembly cavity.

[0059] The motor provided by the present application includes a stator and a rotor, wherein a plurality of teeth of the stator core enclose an assembly cavity, and the rotor is rotatably disposed in the assembly cavity. The motor of the present application includes the stator as in the first aspect, and therefore has all the beneficial effects of the above-mentioned stator, which will not be described one by one here.

[0060] In the above technical solution, further, the rotor includes: an iron core body; an axial hole, which is arranged in the iron core body; a plurality of magnet slot groups, which are arranged in the iron core body, and the plurality of magnet slot groups are arranged at intervals around the axial hole; a plurality of slit groups, which are arranged in the iron core body, and a slit group is arranged between each magnet slot group and the outer peripheral wall of the iron core body, and the slit group includes an odd number of slits.

[0061] In this embodiment, the rotor includes a core body, a shaft hole, a plurality of magnet slot groups, and a plurality of slot groups.

[0062] A plurality of magnet slot groups are arranged around the shaft hole at intervals, and the magnet slot groups are used to install permanent magnets to form magnetic poles.

[0063] A plurality of slit groups are arranged at intervals around the shaft hole.

[0064] A slit group is arranged between each magnet slot group and the outer peripheral wall of the core body.

[0065] The slit group includes an odd number of slits.

[0066] The core body is applied to the motor, and the motor is applied to the compressor. Since the compressor is a pulsating load, the slit group on the core body includes an odd number of slits by reasonably setting the structure of the rotor, that is, the number of slits included in each slit group is an odd number. The odd number of slits in each slit group is arranged asymmetrically. The odd number of slits matches the pulsating load of the compressor, making the output torque of the product more stable. In this way, the radial force density of the motor can be effectively improved, the noise and vibration level of the motor can be improved, and then the noise and vibration of the compressor can be improved.

[0067] In some embodiments, optionally, the rotor also includes a plurality of permanent magnets, each magnet slot group is provided with a permanent magnet, and the permanent magnet contains X% cerium by mass; the stator also includes a winding, and the winding is wound on a plurality of stator teeth; the weight of the plurality of permanent magnets is denoted as Mp, the weight of the winding is denoted as Mc, the back electromotive force value of the motor at a speed of 1000 rpm is denoted as Ke, and the maximum allowable operating voltage of the power device of the controller of the motor is denoted as Ub, wherein, (Mp / Mc)×Ub×X%≤Ke.

[0068] In this embodiment, the rotor further comprises a plurality of permanent magnets, and the stator further comprises a winding.

[0069] The iron core body is provided with a plurality of magnet slot groups, each magnet slot group is provided with a permanent magnet, and the permanent magnet contains X% of cerium by mass.

[0070] The stator comprises a stator core and a winding. The stator core comprises a plurality of stator teeth, and the winding is wound on the plurality of stator teeth.

[0071] The weight of the multiple permanent magnets is recorded as Mp, the weight of the winding is recorded as Mc, the back electromotive force value of the motor at a speed of 1000 rpm is recorded as Ke, and the maximum allowable operating voltage of the power device of the motor controller is recorded as Ub.

[0072] Among them, using permanent magnets containing cerium as magnetic poles can reduce the content of praseodymium and neodymium elements in the permanent magnets, so that the production cost of the permanent magnets can be reduced, and then the production cost of the motor can be reduced, solving the problem of high cost of motors caused by the high prices of rare earth materials such as praseodymium and neodymium in related technologies.

[0073] By replacing the relatively expensive praseodymium and neodymium elements in permanent magnets with the abundant and relatively cheap cerium element, the price of permanent magnets can be effectively reduced and the cost performance of motors can be improved. However, the introduction of cerium will reduce the coercive force of permanent magnets to a certain extent, thereby reducing the magnetic energy product of permanent magnets and weakening the magnetic properties of rotors. In order to ensure that the synthetic magnetic field of the air gap remains unchanged, the magnetic field strength of the stator is usually increased by increasing the amount of stator windings. At the same time, the operation of the motor is usually regulated by the controller, and once the model of the power device in the controller is determined, the maximum operating voltage of the power device is determined accordingly. Since the rotor magnetic field provided by the permanent magnet of the motor is not adjustable, weak magnetic control is usually required to avoid the load voltage of the motor exceeding the allowable value of the power device at high speed. However, blindly increasing the stator magnetic field strength to compensate for the loss of the synthetic magnetic field of the air gap will aggravate the influence of the armature reaction of the stator, which is not conducive to the capacity output of the motor at high speed weak magnetic field, thereby limiting the operating range of the compressor. This requires a matching and balanced design of the motor's stator and rotor magnetic fields, and reasonable adjustment of the motor's permanent magnets, windings and other materials. Under the constraint of the maximum operating voltage of the power device, the motor's back EMF design value must meet the motor's weak magnetic overload capacity, thereby improving the motor's cost-effectiveness.

[0074] It can be understood that when the load is symmetrical, the influence of the armature magnetomotive force on the fundamental wave of the main pole magnetic field is the armature reaction. The armature reaction will affect the performance of the motor. The influence of the armature reaction can be reduced from two aspects. On the one hand, the magnetic field of the stator is weakened. On the other hand, the magnetic field of the rotor is enhanced. The magnetic field of the stator is correlated with the parameters of the windings wound on the stator teeth of the stator core. The magnetic field of the rotor is correlated with the parameters of the permanent magnets. Therefore, by optimizing the relationship between the weight Mp of multiple permanent magnets and the weight Mc of the windings, the synthetic magnetic field of the air gap can be in a balanced state. In this way, the output capacity of the motor at high speed and weak magnetic field can be improved, which is conducive to reducing the armature reaction.

[0075] It is understandable that the permanent magnet contains cerium, and the amount of cerium can also affect the magnetic field of the rotor. If the mass percentage of cerium in the permanent magnet is too large, it is not conducive to improving the magnetic field of the rotor and will aggravate the armature reaction. If the mass percentage of cerium in the permanent magnet is too small, the production cost of the rotor is still high.

[0076] It is understandable that the back EMF value Ke of the motor at 1000 rpm is related to the maximum allowable operating voltage Ub of the power device of the motor controller. If the back EMF value Ke of the motor at 1000 rpm is too high, the power device is prone to breakdown. If the back EMF value Ke of the motor at 1000 rpm is too low, the performance of the motor cannot be effectively exerted.

[0077] Therefore, by reasonably setting the mass percentage X% of cerium in each permanent magnet, the weight Mp of multiple permanent magnets, the weight Mc of the winding, the maximum allowable operating voltage Ub of the power device of the motor controller and the back electromotive force value Ke of the motor at a speed of 1000rpm, so as to satisfy: (Mp / Mc)×Ub×X%≤Ke, the effect of armature reaction when the motor is loaded can be reduced while improving the cost performance of the motor, which is beneficial to enhancing the load capacity of the motor at high speed and weak magnetic field, and is beneficial to reducing the production cost of the motor. Thus, by using permanent magnets with a higher cerium content, the content of praseodymium and neodymium elements in the permanent magnets can be reduced, achieving a better purpose of reducing costs and increasing efficiency.

[0078] The third aspect of the present application proposes a compressor, comprising: a motor as in any technical solution in the second aspect.

[0079] The compressor provided in the present application includes a motor as in any technical solution in the second aspect, and therefore has all the beneficial effects of the above-mentioned motors, which will not be described one by one here.

[0080] A fourth aspect of the present application provides a vehicle, comprising: a compressor as in the third aspect.

[0081] Since the vehicle provided in the present application includes a compressor as in the third aspect, it has all the beneficial effects of the above-mentioned compressor, which will not be described one by one here.

[0082] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0083] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0084] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0085] Figure 1 A schematic diagram of the first part of the structure of a stator according to an embodiment of the present application is shown;

[0086] Figure 2 A schematic diagram of the second part of the structure of a stator according to an embodiment of the present application is shown;

[0087] Figure 3 A third structural schematic diagram of a stator according to an embodiment of the present application is shown;

[0088] Figure 4A partial structural schematic diagram of a stator core and a first insulating frame of an embodiment of the present application is shown;

[0089] Figure 5 A partial structural schematic diagram of a first insulating frame from a first perspective of an embodiment of the present application is shown;

[0090] Figure 6 A partial structural schematic diagram of a first insulating frame from a second viewing angle according to an embodiment of the present application is shown;

[0091] Figure 7 A partial structural schematic diagram of a second insulating frame according to an embodiment of the present application is shown;

[0092] Figure 8 A schematic structural diagram of a stator core from a first perspective of an embodiment of the present application is shown;

[0093] Fig. 9 A schematic structural diagram of a stator core from a second perspective of an embodiment of the present application is shown;

[0094] Fig.10 A partial structural schematic diagram of a motor according to an embodiment of the present application is shown;

[0095] Fig.11 A schematic structural diagram of a compressor according to an embodiment of the present application is shown;

[0096] Fig.12 A schematic diagram showing the changing trend of the armature reaction voltage and the output torque of the motor of the first embodiment of the present application is shown;

[0097] Fig.13 A schematic diagram showing the changing trend of the armature reaction voltage and the output torque of the motor according to the second embodiment of the present application is shown;

[0098] Fig.14 A maximum torque variation curve diagram of a motor according to an embodiment of the present application is shown;

[0099] Fig.15 A schematic diagram showing the changing trends of the output torque and 2-fold frequency radial force density of a motor according to an embodiment of the present application is shown.

[0100] in, Figures 1 to 11 The corresponding relationship between the reference numerals and component names in the figure is:

[0101] 1 motor, 10 stator, 100 stator core, 110 stator yoke, 120 stator teeth, 130 stator slots, 140 first end, 150 second end, 160 first punching sheet group, 170 second punching sheet group, 180 annular yoke, 190 tooth portion, 192 tooth surface, 200 third punching sheet group, 210 assembly cavity, 300 first insulating frame, 400 second insulating frame, 500 insulating teeth, 510 tooth body, 520 slot, 600 extension, 610 extension section, 700 slot insulation paper, 710 phase insulation, 800 winding, 90 rotor, 910 core body, 920 shaft hole, 930 magnet slot group, 940 slit group, 942 slit, 950 permanent magnet, 4 compressor, 41 cover plate, 42 inverter, 43 drive shaft, 44 suction port, 45 housing, 46 compression portion, 47 discharge port. DETAILED DESCRIPTION

[0102] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0103] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0104] Refer to the following Figures 1 to 15 A stator 10 , a motor 1 , a compressor 4 , and a vehicle according to some embodiments of the present application.

[0105] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, according to some embodiments of the present application, a stator 10 includes a stator core 100 , a first insulating frame 300 , a second insulating frame 400 and slot insulating paper 700 .

[0106] The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120 , each of which is connected to an inner peripheral wall of the stator yoke 110 .

[0107] A plurality of stator teeth 120 are arranged at intervals around the axis of the stator core 100 , and two adjacent stator teeth 120 and the stator yoke 110 enclose a stator slot 130 .

[0108] The stator core 100 has a first end 140 and a second end 150 in an axial direction.

[0109] The first insulation frame 300 is disposed at the first end 140 .

[0110] The second insulation frame 400 is disposed at the second end 150 .

[0111] Any one of the first insulation frame 300 and the second insulation frame 400 includes a plurality of insulation teeth 500 .

[0112] Each stator tooth 120 is connected to an insulating tooth 500 .

[0113] The insulating teeth 500 of at least one of the first insulating frame 300 and the second insulating frame 400 are provided with an extending portion 600 , and the extending portion 600 is located at a slot opening of the stator slot 130 .

[0114] The slot insulation paper 700 is disposed in the stator slot 130 , and the slot insulation paper 700 abuts against the extension portion 600 . The extension portion 600 can at least limit the slot insulation paper 700 in the radial direction of the stator core 100 .

[0115] In the circumferential direction of the stator core 100 , the gap value between the extension portions 600 of two adjacent insulating teeth 500 is denoted as d01 , and the slot width of the stator slot 130 is denoted as T, wherein d01<T.

[0116] In this embodiment, the stator 10 includes a stator core 100 , a first insulation frame 300 , a second insulation frame 400 , and slot insulation paper 700 .

[0117] The stator core 100 includes a stator yoke 110 and stator teeth 120. There are multiple stator teeth 120. Any stator tooth 120 among the multiple stator teeth 120 is connected to the inner peripheral wall of the stator yoke 110. The multiple stator teeth 120 are arranged at intervals around the axis of the stator core 100. Two adjacent stator teeth 120 and the stator yoke 110 enclose a stator slot 130. The stator core 100 has a first end 140 and a second end 150. The first end 140 of the stator core 100 and the second end 150 of the stator core 100 are opposite and arranged at intervals along the axial direction of the stator core 100.

[0118] The first insulating frame 300 is disposed at the first end 140 of the stator core 100, and the second insulating frame 400 is disposed at the second end 150 of the stator core 100. Either the first insulating frame 300 or the second insulating frame 400 includes a plurality of insulating teeth 500, that is, the first insulating frame 300 includes a plurality of insulating teeth 500, and the second insulating frame 400 includes a plurality of insulating teeth 500, and each stator tooth 120 is connected to one insulating tooth 500 of the first insulating frame 300 and one insulating tooth 500 of the second insulating frame 400.

[0119] The insulating teeth 500 of the first insulating frame 300 are provided with extension parts 600 , or the insulating teeth 500 of the second insulating frame 400 are provided with extension parts 600 , or both the insulating teeth 500 of the first insulating frame 300 and the insulating teeth 500 of the second insulating frame 400 are provided with extension parts 600 .

[0120] After the first insulating frame 300, the second insulating frame 400, the slot insulating paper 700 and the stator core 100 are assembled, the slot insulating paper 700 is arranged in the stator slot 130, the extension part 600 extends into the notch of the stator slot 130, and the slot insulating paper 700 abuts against the extension part 600. The extension part 600 can at least limit the slot insulating paper 700 in the radial direction of the stator core 100 to ensure the matching size of the slot insulating paper 700 and the stator slot 130.

[0121] The matching structure of the first insulating frame 300, the second insulating frame 400 and the stator core 100 is reasonably set, so that the gap value of the extension part 600 of two adjacent insulating teeth 500 in the circumferential direction of the stator core 100 is recorded as d01, and the slot width of the stator slot 130 in the circumferential direction of the stator core 100 is recorded as T, and the relationship between d01 and T is defined so that d01<T is satisfied. In other words, the extension part 600 located at the slot of the stator slot 130 and the slot wall of the stator slot 130 cooperate to limit the slot insulation paper 700. Since the gap between the extension part 600 of the two adjacent insulating teeth 500 in the circumferential direction of the stator core 100 is small, the extension part 600 located at the slot of the stator slot 130 can effectively block the slot insulation paper 700, prevent the slot insulation paper 700 from protruding from the inner diameter of the stator core 100, and avoid the occurrence of undesirable problems such as the inward convexity of the slot insulation paper 700. And due to the presence of the extension part 600, the slot width of the stator slot 130 in the circumferential direction of the stator core 100 can be appropriately increased. This setting can reduce magnetic leakage, increase the output torque of the motor 1, improve the high-frequency overload capacity of the motor 1, and is conducive to improving the performance of the motor 1 and the reliability of the motor 1. In other words, the slot wall of the stator slot 130 and the extension part 600 cooperate to take into account the magnetic leakage of the motor 1 and the inner convexity of the blocking slot insulation paper 700, which can not only improve the power density of the motor 1, but also ensure the safety and reliability of the use of the motor 1.

[0122] It can be understood that at least one of the first insulating frame 300 and the second insulating frame 400 is provided with an extension 600, that is, at least one of the first insulating frame 300 and the second insulating frame 400 serves as a mounting carrier of the extension 600, has the function of mounting and fixing the extension 600, and can ensure the matching size of the extension 600, the notch of the stator slot 130 and the slot insulating paper 700. In other words, the existing structure of the first insulating frame 300 and the second insulating frame 400 is reasonably utilized, and the role of the insulating frame provided with the extension 600 is enriched, so that the insulating frame provided with the extension 600 has both an insulating function and a function of preventing the slot insulating paper 700 from convex. And this setting also provides structural support for increasing the notch of the stator slot 130, and can reduce magnetic leakage and improve the high-frequency overload capacity of the motor 1 while ensuring the matching size of the slot insulating paper 700 and the stator core 100.

[0123] In some embodiments, Figure 4 As shown, the extension portion 600 is connected to the slot wall of the stator slot 130 .

[0124] In this embodiment, the matching structure of the extension part 600 and the stator slot 130 is further defined, so that the extension part 600 is connected to the slot wall of the stator slot 130. That is, the extension part 600 is located at the notch of the stator slot 130, and the extension part 600 is connected to the slot wall of the stator slot 130. This setting makes the extension part 600 and the slot wall of the stator slot 130 connected as a whole. In this way, it is possible to effectively prevent the slot insulation paper 700 from protruding from the gap between the slot wall of the stator slot 130 and the extension part 600, and provide effective and reliable structural support to ensure the safety and reliability of the use of the motor 1.

[0125] In some embodiments, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the insulating tooth 500 provided with the extension portion 600 includes a tooth body 510 .

[0126] The tooth body 510 is provided with a slot 520 , and the end of the stator tooth 120 is inserted into the slot 520 .

[0127] The extension portion 600 is connected to an end surface of the tooth body 510 facing the axis of the stator core 100 .

[0128] The extension portion 600 includes two extension sections 610 , and the two extension sections 610 are arranged at intervals in the circumferential direction of the stator core 100 .

[0129] Each extension section 610 extends into the slot opening of a stator slot 130 , and each extension section 610 abuts against the slot insulation paper 700 .

[0130] In this embodiment, the structures of the first insulating frame 300 and the second insulating frame 400 are further defined, so that the insulating tooth 500 provided with an extension portion 600 includes a tooth body 510, and the tooth body 510 is provided with a slot 520, and the end of the stator tooth 120 is inserted into the slot 520. This arrangement is conducive to increasing the matching area of ​​the first insulating frame 300, the second insulating frame 400 and the stator core 100, and can ensure the stability and reliability of the assembly of the first insulating frame 300, the second insulating frame 400 and the stator core 100.

[0131] The extension part 600 includes two extension sections 610, which are arranged at intervals along the circumference of the stator core 100, and any one of the two extension sections 610 is connected to the end surface of the tooth body 510 facing the axis of the stator core 100. Each extension section 610 extends into the notch of a stator slot 130, that is, the two extension sections 610 of the extension part 600 extend into the notch of two stator slots 130 respectively. In other words, two extension sections 610 are provided at the notch of one stator slot 130, or four extension sections 610 are provided at the notch of one stator slot 130. This arrangement can increase the abutment area between the extension part 600 and the slot insulating paper 700, and ensure the balance and consistency of the abutment between the extension part 600 and the slot insulating paper 700, thereby avoiding the situation where one circumferential side of the slot insulating paper 700 abuts against the extension part 600 and the other circumferential side of the slot insulating paper 700 is separated from the extension part 600, which may easily cause the slot insulating paper 700 to bulge inward.

[0132] In addition, the extension portion 600 is connected to the end face of the tooth body 510 facing the axis of the stator core 100. This arrangement can not only meet the use requirement of the extension portion 600 being located at the slot opening of the stator slot 130, but also reduce the occupancy rate of the extension portion 600 on the internal space of the stator slot 130.

[0133] In some embodiments, when the insulating teeth 500 of either the first insulating frame 300 or the second insulating frame 400 are provided with an extension portion 600, along the circumference of the stator core 100, the gap value of the extension portions 600 of two adjacent insulating teeth 500 of the first insulating frame 300 is equal to the gap value of the extension portions 600 of two adjacent insulating teeth 500 of the second insulating frame 400.

[0134] In this embodiment, the structures of the first insulating frame 300 and the second insulating frame 400 are further defined. When the insulating teeth 500 of the first insulating frame 300 are provided with an extension 600, and the insulating teeth 500 of the second insulating frame 400 are provided with an extension 600, along the circumferential direction of the stator core 100, the gap value of the extension 600 of two adjacent insulating teeth 500 of the first insulating frame 300 is equal to the gap value of the extension 600 of two adjacent insulating teeth 500 of the second insulating frame 400. In this way, the processing difficulty of the first insulating frame 300 and the second insulating frame 400 is reduced, the production is convenient, the processing efficiency is improved, and the production cost of the product is reduced.

[0135] In addition, this structural setting can ensure the balance and consistency of the abutment area between the extension part 600 of the first insulating frame 300 and the extension part 600 of the second insulating frame 400 and the slot insulating paper 700, which is conducive to improving the effectiveness and feasibility of preventing the slot insulating paper 700 from bulging inward.

[0136] In some embodiments, Figure 8 As shown, the stator core 100 includes a first punching sheet group 160 and a second punching sheet group 170 .

[0137] Along the axial direction of the stator core 100 , the second punching sheet group 170 is stacked on one side of the first punching sheet group 160 .

[0138] Furthermore, the second punching sheet group 170 is closer to the end of the stator core 100 than the first punching sheet group 160 .

[0139] Either the first punching plate group 160 or the second punching plate group 170 includes an annular yoke portion 180 and a plurality of teeth portions 190 .

[0140] The stator yoke 110 includes an annular yoke portion 180 .

[0141] The tooth portion 190 is connected to the inner peripheral wall of the annular yoke portion 180 , and each stator tooth 120 includes one tooth portion 190 .

[0142] An end surface of the tooth portion 190 facing the axis of the stator core 100 is a tooth surface 192 .

[0143] Along the circumferential direction of the stator core 100 , a gap value between two adjacent tooth surfaces 192 of the first punching sheet group 160 is different from a gap value between two adjacent tooth surfaces 192 of the second punching sheet group 170 .

[0144] In this embodiment, the stator core 100 includes a first punching sheet group 160 and a second punching sheet group 170 .

[0145] The first punching sheet group 160 and the second punching sheet group 170 are arranged along the axial direction of the stator core 100 . Specifically, along the axial direction of the stator core 100 , the second punching sheet group 170 is stacked on one side of the first punching sheet group 160 .

[0146] The first punching sheet group 160 includes an annular yoke 180 and a plurality of tooth portions 190 , any one of the plurality of tooth portions 190 is connected to the inner circumferential wall of the annular yoke 180 , the plurality of tooth portions 190 are arranged at intervals around the axis of the stator core 100 , the stator yoke 110 includes the annular yoke 180 , and each stator tooth 120 includes a tooth portion 190 .

[0147] The second punching sheet group 170 includes an annular yoke 180 and a plurality of tooth portions 190 , wherein any one of the plurality of tooth portions 190 is connected to the inner circumferential wall of the annular yoke 180 , and the plurality of tooth portions 190 are arranged at intervals around the axis of the stator core 100 , and the stator yoke 110 includes the annular yoke 180 , and each stator tooth 120 includes a tooth portion 190 .

[0148] The structures of the first punching sheet group 160 and the second punching sheet group 170 are defined so that along the circumferential direction of the stator core 100 , the gap value between two adjacent tooth surfaces 192 of the first punching sheet group 160 is different from the gap value between two adjacent tooth surfaces 192 of the second punching sheet group 170 .

[0149] It is understandable that, when the load is symmetrical, the effect of the armature magnetomotive force on the fundamental wave of the main pole magnetic field is the armature reaction. The armature reaction will affect the performance of the motor 1. The present application reasonably sets the structure of the stator 10 so that the first punching sheet group 160 and the second punching sheet group 170 are set with different slot widths in the circumferential direction of the stator core 100. In this way, the armature reaction of the motor 1 can be improved, the voltage of the armature reaction of the motor 1 can be reduced, and the torque output of the motor 1 under high-speed conditions can be improved.

[0150] It can be understood that, along the circumference of the stator core 100, the punching sheet group with a smaller gap value between two adjacent tooth surfaces 192 has the function of blocking the winding 800 and the slot insulation paper 700 of the stator 10, and the punching sheet group with a larger gap value between two adjacent tooth surfaces 192 has the function of reducing magnetic leakage and increasing the output torque of the motor 1. In other words, this setting takes into account both the magnetic leakage of the motor 1 and the blocking of the winding 800 and the slot insulation paper 700 of the stator 10 from protruding from the inner diameter of the stator core 100, which is conducive to improving the safety and reliability of the use of the motor 1.

[0151] In some embodiments, Figure 3 and Fig. 9 As shown, along the circumferential direction of the stator core 100 , the gap value between two adjacent tooth surfaces 192 of the first punching sheet group 160 is recorded as d1.

[0152] The gap value between two adjacent tooth surfaces 192 of the second punching plate group 170 is recorded as d2.

[0153] Among them, d2>d1≥d01.

[0154] In this embodiment, the structure of the stator core 100 is further defined, so that the gap value between two adjacent tooth surfaces 192 of the first punching sheet group 160 in the circumferential direction of the stator core 100 is recorded as d1, and the gap value between two adjacent tooth surfaces 192 of the second punching sheet group 170 in the circumferential direction of the stator core 100 is recorded as d2, and the relationship between d1, d2 and d01 is defined so as to satisfy d2>d1≥d01. That is, the stator core 100 includes punching sheet groups with different slot widths of the stator slots 130, and the smaller value d1 of the slot width is greater than or equal to the gap value d01 of the extension 600 of two adjacent insulating teeth 500. The first punching sheet group 160 and the extension part 600 can cooperate to effectively block the slot insulation paper 700 and prevent the slot insulation paper 700 from protruding from the inner diameter of the stator core 100. The second punching sheet group 170 and the first punching sheet group 160 can cooperate to reduce leakage magnetic field, improve the output torque of the motor 1, and improve the high-frequency overload capacity of the motor 1, which is beneficial to improving the performance of the motor 1 and the reliability of the motor 1.

[0155] It can be understood that the second punching sheet group 170 is closer to the end of the stator core 100 than the first punching sheet group 160, that is, the distance from the second punching sheet group 170 to the end of the stator core 100 is smaller than the distance from the first punching sheet group 160 to the end of the stator core 100, that is, along the circumference of the stator core 100, the punching sheet group with a smaller slot width is closer to the middle of the stator core 100. In this way, the slot insulation paper 700 of the stator 10 can be effectively blocked to prevent the slot insulation paper 700 from protruding from the inner diameter of the stator core 100, and the reliability of the motor 1 can be improved.

[0156] In some embodiments, d1 and d2 satisfy: 1.5<d2 / d1<3.

[0157] In this embodiment, the matching structure of the first punching sheet group 160 and the second punching sheet group 170 is further defined, so that the width d1 of the notch of the stator slot 130 of the first punching sheet group 160 in the circumferential direction of the stator core 100 and the width d2 of the notch of the stator slot 130 of the second punching sheet group 170 in the circumferential direction of the stator core 100 satisfy: 1.5<d2 / d1<3. The notch width d1=2.0mm of the stator slot 130 of the first punching sheet group 160 can effectively prevent the inward bulge of the slot insulation, but a reduction in the notch width will increase the leakage flux, resulting in a reduction in the output torque of the motor 1 and an increase in the armature reaction voltage of the motor 1. If the notch width of the motor 1 is too large, the effective stator-rotor gap of the motor 1 will increase, resulting in a reduction in the output torque of the motor 1 and an increase in the armature reaction voltage of the motor 1. Fig.13As shown, the present application can improve the armature reaction of the motor 1, reduce the voltage of the armature reaction of the motor 1, and improve the torque output of the motor 1 under high-speed conditions by reasonably setting the structure of the stator 10.

[0158] If d2 / d1 is less than or equal to 1.5, the difference between the slot width of the first punching sheet group 160 in the circumferential direction of the stator core 100 and the slot width of the second punching sheet group 170 in the circumferential direction of the stator core 100 is small, that is, the slot width of the first punching sheet group 160 in the circumferential direction of the stator core 100 is closer to the slot width of the second punching sheet group 170 in the circumferential direction of the stator core 100. In this way, the effect of alleviating the armature reaction is poor, and the effect of improving the torque output of the motor 1 under high-speed conditions is poor.

[0159] If d2 / d1 is greater than or equal to 3, the width of the stator slot 130 of the second punching sheet group 170 in the circumferential direction of the stator core 100 is too large, so that the winding 800 wound on the teeth 190 of the first punching sheet group 160 and the second punching sheet group 170 cannot be effectively blocked, and the winding 800 is prone to be separated from the teeth 190, and the stability and reliability of the electronic movement cannot be guaranteed. In addition, this setting will increase the gap between the stator and rotor 90 of the motor 1, which will affect the capacity density of the motor 1 and the torque output of the motor 1.

[0160] Optionally, d2 / d1=1.7, d2 / d1=1.9, d2 / d1=2, d2 / d1=2.2, d2 / d1=2.4, d2 / d1=2.6 and d2 / d1=2.8, etc., which are not listed here one by one.

[0161] In some embodiments, Figure 8 and Fig. 9 As shown, the stator core 100 further includes a third punching sheet group 200 .

[0162] The second punching sheet group 170 is located between the first punching sheet group 160 and the third punching sheet group 200 .

[0163] The third punching plate group 200 includes an annular yoke portion 180 and a plurality of teeth portions 190 .

[0164] Along the circumferential direction of the stator core 100 , the gap value between two adjacent tooth surfaces 192 of the third punching sheet group 200 is recorded as d3, wherein d3>d2.

[0165] In this embodiment, the structure of the stator core 100 is further defined so that the stator core 100 also includes a third punching sheet group 200. Along the axial direction of the stator core 100, the second punching sheet group 170 is located between the first punching sheet group 160 and the third punching sheet group 200. In other words, the third punching sheet group 200 is located at the end of the stator core 100.

[0166] The third punching sheet group 200 includes an annular yoke 180 and a plurality of teeth 190, any of which is connected to the inner peripheral wall of the annular yoke 180, and the plurality of teeth 190 are arranged at intervals around the axis of the stator core 100. The stator yoke 110 includes an annular yoke 180, and each stator tooth 120 includes one tooth 190.

[0167] The structures of the first punching sheet group 160, the second punching sheet group 170 and the third punching sheet group 200 are defined, so that the width of the notch of the stator slot 130 of the first punching sheet group 160 in the circumferential direction of the stator core 100 is recorded as d1, the width of the notch of the stator slot 130 of the second punching sheet group 170 in the circumferential direction of the stator core 100 is recorded as d2, and the width of the notch of the stator slot 130 of the third punching sheet group 200 in the circumferential direction of the stator core 100 is recorded as d3, and the relationship between d1, d2 and d3 is defined so as to satisfy: d3>d2>d1. That is to say, along the axial direction of the stator core 100, the width of the notch of the first punching sheet group 160, the second punching sheet group 170 and the third punching sheet group 200 in the circumferential direction of the stator core 100 gradually increases, and this setting can reduce magnetic leakage and improve the output torque of the motor 1. In other words, the first punching sheet group 160, the second punching sheet group 170 and the third punching sheet group 200 are provided with different slot widths in the circumferential direction of the stator core 100, so that the armature reaction of the motor 1 can be improved, the voltage of the armature reaction of the motor 1 can be reduced, and the torque output of the motor 1 under high-speed conditions can be improved.

[0168] It can be understood that the first punching sheet group 160 with a smaller slot width in the circumferential direction of the stator core 100 is located in the middle of the stator core 100, and the third punching sheet group 200 with a larger slot width in the circumferential direction of the stator core 100 is located at the end of the stator core 100. In this way, the problem of the slot insulation of the stator 10 protruding from the inner diameter of the stator core 100 can be effectively prevented, thereby improving the reliability of the motor 1.

[0169] In other words, this arrangement takes into account both the magnetic flux leakage of the motor 1 and the inner diameter of the stator core 100 that is blocked by slot insulation of the stator 10 , which is beneficial to improving the safety and reliability of the use of the motor 1 .

[0170] In this embodiment, there are multiple third punching sheet groups 200 .

[0171] In some other embodiments, the number of the third punching sheet group 200 is one.

[0172] like Figure 8 As shown, the stator core 100 includes a first punching sheet group 160 , two second punching sheet groups 170 and two third punching sheet groups 200 .

[0173] Optionally, along the circumferential direction of the stator core 100, the slot width of the stator slot 130 of any of the first punching sheet group 160, the second punching sheet group 170 and the third punching sheet group 200 is greater than or equal to 1.8 mm and less than or equal to 4 mm. For example, slot width = 2 mm, slot width = 2.2 mm, slot width = 2.4 mm, slot width = 2.6 mm, slot width = 2.8 mm, slot width = 3 mm, slot width = 3.2 mm, slot width = 3.4 mm, slot width = 3.6 mm and slot width = 3.8 mm, etc., which are not listed here one by one.

[0174] In some embodiments, Figure 8 As shown, the number of the first punching sheet group 160 is denoted as m.

[0175] The number of the second punching sheet groups 170 is denoted as n.

[0176] A first punching sheet group 160 is disposed between any two adjacent second punching sheet groups 170 , where m≥1 and n≥2.

[0177] The axial height of the first punching sheet group 160 is denoted as h1.

[0178] The axial height of the second punching sheet group 170 is denoted as h2.

[0179] Among them, 0.05<(m×h1) / (n×h2)<0.2.

[0180] In this embodiment, the structures of the first punching sheet group 160 and the second punching sheet group 170 are defined such that the number of the first punching sheet group 160 is recorded as m, the number of the second punching sheet group 170 is recorded as n, m≥1, n≥2. It is also defined that one first punching sheet group 160 is provided between any two adjacent second punching sheet groups 170. That is, the second punching sheet group 170 is provided at the axial end surface of each first punching sheet group 160.

[0181] This arrangement can meet the use requirements of setting different slot widths of the first punching sheet group 160 and the second punching sheet group 170 in the circumferential direction of the stator core 100, and make the number of the first punching sheet group 160 smaller than the number of the second punching sheet group 170. In this way, the slot insulation of the stator 10 can be effectively prevented from protruding from the inner diameter of the stator core 100, which can improve the reliability of the motor 1 and help reduce the material input of the stator core 100, thereby helping to reduce the weight of the stator core 100 and reduce the production cost of the stator core 100.

[0182] It is understandable that if the slot width of the punching sheet group in the circumferential direction of the stator core 100 is small, the magnetic flux leakage will increase significantly, thus reducing the output torque of the motor 1. Therefore, the number of the first punching sheet group 160 is smaller than the number of the second punching sheet group 170, so as to take into account the magnetic flux leakage of the motor 1 and prevent the slot insulation of the stator 10 from protruding from the inner diameter of the stator core 100, which is conducive to improving the safety and reliability of the use of the motor 1.

[0183] And the relationship between h1, h2, m and n is defined to satisfy: 0.05<(m×h1) / (n×h2)<0.2. That is to say, the relationship between the sum of the axial heights of all the first punching sheet groups 160 included in the stator core 100 and the sum of the axial heights of all the second punching sheet groups 170 included in the stator core 100 is defined. Because reducing the slot width of the second punching sheet group 170 in the circumferential direction of the stator core 100 will increase the risk of magnetic leakage of the stator 10, therefore, by defining the optimal ratio of the axial heights of the first punching sheet group 160 and the second punching sheet group 170, the risk of magnetic leakage can be minimized to the maximum extent, that is, the magnetic leakage can be reduced under the premise of ensuring the performance of the motor 1.

[0184] Optionally, (m×h1) / (n×h2)=0.06, (m×h1) / (n×h2)=0.07, (m×h1) / (n×h2)=0.08, (m×h1) / (n×h2)=0.09, (m×h1) / (n×h2)=0.1, (m×h1) / (n×h2)=0.12, (m×h1) / (n×h2)=0.14, (m×h1) / (n×h2)=0.16 and (m×h1) / (n×h2)=0.18, etc., which are not listed here one by one.

[0185] In some embodiments, Fig. 9 As shown, the distance from the stator teeth 120 to the axis of the stator core 100 is denoted as D1. The distance from the outer peripheral wall of the stator yoke 110 to the axis of the stator core 100 is denoted as D2.

[0186] Among them, 0.6≤D1 / D2≤0.7.

[0187] In this embodiment, the structure of the stator core 100 is further defined, so that the distance from the stator teeth 120 to the axis of the stator core 100 is recorded as D1, and the distance from the outer peripheral wall of the stator yoke 110 to the axis of the stator core 100 is recorded as D2, that is, the inner diameter of the stator core 100 is recorded as D1, and the outer diameter of the stator core 100 is recorded as D2. And D1 and D2 satisfy 0.6≤D1 / D2≤0.7.

[0188] This setting limits the matching dimensions of the inner diameter and outer diameter of the stator core 100. By optimizing the split ratio of the motor 1, the main magnetic field provided by the permanent magnet 950 of the motor 1 can be increased. Under the condition of the same back electromotive force, the number of turns of the stator winding 800 can be reduced, thereby improving the anti-demagnetization ability of the motor 1, and further ensuring the safety and reliability of the use of the motor 1.

[0189] When the inner diameter of the stator core 100 is increased, the outer diameter of the stator core 100 is also increased, so that the amount of magnets used can be increased and the power density of the motor 1 can be improved.

[0190] If D1 / D2 is greater than 0.7, the area of ​​the stator slots 130 of the stator 10 will be reduced, so that the stator teeth 120 and the yoke of the stator 10 are saturated, the armature flux is sharply reduced, and the output power of the motor 1 is deteriorated.

[0191] Specifically, the ratios of D1 and D2 include 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, 0.67, 0.68 and 0.69, etc., which are not listed here one by one.

[0192] Specifically, when the ratio of D1 to D2 is within the above range, the efficiency of the motor 1 is higher and the copper loss of the motor 1 is lower, that is, the efficiency, copper loss and iron loss of the motor 1 are taken into consideration.

[0193] like Fig.12 As shown, when the relationship between D1 and D2 satisfies 0.6≤D1 / D2≤0.7, the armature reaction voltage is reduced and the output torque is increased.

[0194] like Fig.10 As shown, a motor 1 according to some other embodiments of the present application includes: a stator 10 and a rotor 90 as in any of the above embodiments.

[0195] The plurality of stator teeth 120 enclose an assembly cavity 210 , and the rotor 90 is rotatably disposed in the assembly cavity 210 .

[0196] In this embodiment, the motor 1 includes a stator 10 and a rotor 90. The plurality of teeth 190 of the stator core 100 enclose an assembly cavity 210, and the rotor 90 is rotatably disposed in the assembly cavity 210. Since the motor 1 of the present application includes the stator 10 as in the first aspect, it has all the beneficial effects of the stator 10, which are not described one by one here.

[0197] In some embodiments, Fig.10 As shown, the rotor 90 includes a core body 910 , a shaft hole 920 , a plurality of magnet slot groups 930 , and a plurality of slot groups 940 .

[0198] The shaft hole 920 is disposed in the core body 910 .

[0199] A plurality of magnet slot groups 930 are provided on the core body 910 , and the plurality of magnet slot groups 930 are arranged at intervals around the shaft hole 920 .

[0200] A plurality of slit groups 940 are provided on the core body 910 , and one slit group 940 is arranged between each magnet slot group 930 and the outer peripheral wall of the core body 910 .

[0201] The slit group 940 includes an odd number of slits 942 .

[0202] In this embodiment, the rotor 90 includes a core body 910 , a shaft hole 920 , a plurality of magnet slot groups 930 , and a plurality of slot groups 940 .

[0203] A plurality of magnet slot groups 930 are arranged at intervals around the shaft hole 920 , and the magnet slot groups 930 are used to install permanent magnets 950 to form magnetic poles.

[0204] A plurality of slit groups 940 are spaced apart around the shaft hole 920 .

[0205] A slit group 940 is arranged between each magnet slot group 930 and the outer peripheral wall of the core body 910 .

[0206] The slit group 940 includes an odd number of slits 942 .

[0207] The core body 910 is applied to the motor 1, and the motor 1 is applied to the compressor 4. Since the compressor 4 is a pulsating load, the slit group 940 on the core body 910 includes an odd number of slits 942 by reasonably setting the structure of the rotor 90, that is, the number of slits 942 included in each slit group 940 is an odd number. The odd number of slits 942 in each slit group 940 is arranged asymmetrically. The odd number of slits 942 matches the pulsating load of the compressor 4, so that the output torque of the product is more stable. In this way, the radial force density of the motor 1 can be effectively improved, the noise and vibration level of the motor 1 can be improved, and then the noise and vibration of the compressor 4 can be improved.

[0208] In some embodiments, Fig.10 and Fig.14 As shown, the rotor 90 further includes a plurality of permanent magnets 950 , and the stator 10 further includes a winding 800 .

[0209] A permanent magnet 950 is disposed in each magnet slot group 930 , and the permanent magnet 950 contains X% cerium by mass.

[0210] The winding 800 is wound around a plurality of stator teeth 120 .

[0211] The weight of the plurality of permanent magnets 950 is denoted as Mp.

[0212] The weight of the winding 800 is denoted as Mc.

[0213] The back electromotive force value of motor 1 at a rotation speed of 1000 rpm is denoted as Ke.

[0214] The highest permissible operating voltage of the power devices of the controller of the motor 1 is denoted as Ub.

[0215] Among them, (Mp / Mc)×Ub×X%≤Ke.

[0216] In this embodiment, the rotor 90 further includes a plurality of permanent magnets 950 , and the stator 10 further includes a winding 800 .

[0217] The core body 910 is provided with a plurality of magnet slot groups 930 , each magnet slot group 930 is provided with a permanent magnet 950 , and the permanent magnet 950 contains X% of cerium by mass.

[0218] The stator 10 includes a stator core 100 and a winding 800 . The stator core 100 includes a plurality of stator teeth 120 . The winding 800 is wound around the plurality of stator teeth 120 .

[0219] The weight of the plurality of permanent magnets 950 is denoted as Mp, the weight of the winding 800 is denoted as Mc, the back electromotive force value of the motor 1 at a rotation speed of 1000 rpm is denoted as Ke, and the maximum allowable operating voltage of the power device of the controller of the motor 1 is denoted as Ub.

[0220] Among them, using the permanent magnet 950 containing cerium as the magnetic pole can reduce the content of praseodymium and neodymium elements in the permanent magnet 950, so that the production cost of the permanent magnet 950 can be reduced, and then the production cost of the motor 1 can be reduced, solving the problem of high cost of the motor 1 caused by the high price of rare earth materials such as praseodymium and neodymium in the related technology.

[0221] By replacing the relatively expensive praseodymium and neodymium elements in the permanent magnet 950 with the abundant and relatively cheap cerium element, the price of the permanent magnet 950 can be effectively reduced, and the cost performance of the motor 1 can be improved. However, the introduction of the cerium element will reduce the coercive force of the permanent magnet 950 to a certain extent, thereby reducing the magnetic energy product of the permanent magnet 950, and the magnetic properties of the rotor 90 will be weakened. In order to ensure that the synthetic magnetic field of the air gap remains unchanged, the magnetic field strength of the stator 10 is usually increased by increasing the amount of the winding 800 of the stator 10. At the same time, the operation of the motor 1 is usually regulated by the controller, and once the model of the power device in the controller is determined, the maximum operating voltage of the power device is determined accordingly. Since the magnetic field of the rotor 90 provided by the permanent magnet 950 of the motor 1 is not adjustable, weak magnetic control is usually required to avoid the load voltage of the motor 1 exceeding the allowable value of the power device at high speed. Simply increasing the magnetic field strength of the stator 10 to compensate for the loss of the air gap synthetic magnetic field will increase the influence of the armature reaction of the stator 10, which is not conducive to the output capacity of the motor 1 at high speed and weak magnetic field, thereby limiting the operating range of the compressor 4. This requires matching and balancing the magnetic field of the stator and rotor 90 of the motor 1, and reasonably adjusting the amount of materials such as the permanent magnet 950 and the winding 800 of the motor 1. Under the constraint of the maximum working voltage of the power device, the back electromotive force design value of the motor 1 meets the weak magnetic overload capacity of the motor 1, thereby improving the cost performance of the motor 1.

[0222] It can be understood that when the load is symmetrical, the influence of the armature magnetomotive force on the fundamental wave of the main pole magnetic field is the armature reaction. The armature reaction will affect the performance of the motor 1. The influence of the armature reaction can be reduced from two aspects. On the one hand, the magnetic field of the stator 10 is weakened. On the other hand, the magnetic field of the rotor 90 is enhanced. The magnetic field of the stator 10 is correlated with the parameters of the winding 800 wound on the stator teeth 120 of the stator core 100. The magnetic field of the rotor 90 is correlated with the parameters of the permanent magnet 950. Therefore, by optimizing the relationship between the weight Mp of multiple permanent magnets 950 and the weight Mc of the winding 800, the air gap synthetic magnetic field can be in a balanced state. In this way, the output capacity of the motor 1 at high speed and weak magnetic field can be improved, which is conducive to reducing the armature reaction.

[0223] It is understandable that the permanent magnet 950 contains cerium, and the amount of cerium used can also affect the magnetic field of the rotor 90. If the mass percentage of cerium in the permanent magnet 950 is too large, it is not conducive to improving the magnetic field of the rotor 90 and will aggravate the armature reaction. If the mass percentage of cerium in the permanent magnet 950 is too small, the production cost of the rotor 90 is still high.

[0224] It is understandable that the back EMF value Ke of the motor 1 at 1000 rpm is related to the maximum allowable operating voltage Ub of the power device of the controller of the motor 1. If the back EMF value Ke of the motor 1 at 1000 rpm is too high, the power device is easily broken down. If the back EMF value Ke of the motor 1 at 1000 rpm is too low, the performance of the motor 1 cannot be effectively exerted.

[0225] Therefore, by reasonably setting the mass percentage X% of cerium in each permanent magnet 950, the weight Mp of multiple permanent magnets 950, the weight Mc of the winding 800, the maximum allowable operating voltage Ub of the power device of the controller of the motor 1, and the back electromotive force value Ke of the motor 1 at a speed of 1000rpm, so as to satisfy: (Mp / Mc)×Ub×X%≤Ke, the effect of the armature reaction when the motor 1 is loaded can be reduced while improving the cost performance of the motor 1, which is beneficial to enhancing the load capacity of the motor 1 at high speed and weak magnetic field, and is beneficial to reducing the production cost of the motor 1. Therefore, by using permanent magnets 950 with a higher cerium content, the content of praseodymium and neodymium elements in the permanent magnets 950 can be reduced, achieving a better purpose of reducing costs and increasing efficiency.

[0226] like Fig.11 As shown, a compressor 4 according to some other embodiments of the present application includes: a motor 1 as in the above embodiment.

[0227] In this embodiment, the compressor 4 includes the motor 1 as in the above embodiment, and therefore has all the beneficial effects of the above motor 1, which are not described one by one here.

[0228] A vehicle according to some further embodiments of the present application includes: a compressor 4 as described in the above embodiments.

[0229] In this embodiment, since the vehicle includes the compressor 4 as in the above embodiment, it has all the beneficial effects of the above compressor 4, which will not be described one by one here.

[0230] It is worth noting that the vehicle can be a new energy vehicle, which includes pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0231] Specifically, the stator 10 of the present application includes a stator core 100 , a first insulating frame 300 , a second insulating frame 400 , a winding 800 , and slot insulating paper 700 .

[0232] The stator core 100 includes a stator yoke 110 and stator teeth 120. The stator teeth 120 are connected to the inner circumferential wall of the stator yoke 110, and a plurality of stator teeth 120 are arranged at intervals around the axis of the stator core 100, and two adjacent stator teeth 120 and the stator yoke 110 enclose a stator slot 130. The first insulating frame 300 is arranged at the first axial end 140 of the stator core 100, and the first insulating frame 300 includes an extension section 610. The second insulating frame 400 is arranged at the second axial end 150 of the stator core 100. The winding 800 is wound around the stator teeth 120, the first insulating frame 300 and the second insulating frame 400. The slot insulating paper 700 is arranged in the stator slot 130, and is located between the slot wall of the stator slot 130 and the winding 800. At the first axial end 140 of the stator core 100, the slot insulating paper 700 is fitted to the extension section 610 at the notch of the stator slot 130. At the first axial end 140 of the stator core 100, the extension section 610 of the first insulating frame 300 is connected to the slot wall of the stator slot 130 at the notch of the stator slot 130, and forms a certain fitting position at the notch of the stator slot 130. After the stator 10 is assembled, along the circumference of the stator core 100, the gap value of the extension portion 600 of two adjacent insulating teeth 500 is recorded as d01, and the notch width of the stator slot 130 is recorded as T, where d01<T. This setting can not only improve the power density of the motor 1, but also ensure the reliability of the motor 1.

[0233] The stator core 100 includes: a first punching sheet group 160; a second punching sheet group 170, wherein the second punching sheet group 170 is stacked on one side of the first punching sheet group 160 along the axial direction of the stator core 100, and the second punching sheet group 170 is closer to the end of the stator core 100 than the first punching sheet group 160, and either the first punching sheet group 160 or the second punching sheet group 170 includes: an annular yoke 180, wherein the stator yoke 110 includes an annular yoke 180; a plurality of tooth portions 190, wherein the tooth portion 190 is connected to the inner circumferential wall of the annular yoke 180, and each stator tooth 120 includes a tooth portion 190, and the end face of the tooth portion 190 facing the axis of the stator core 100 is a tooth face 192; along the circumferential direction of the stator core 100, the gap value between two adjacent tooth faces 192 of the first punching sheet group 160 is different from the gap value between two adjacent tooth faces 192 of the second punching sheet group 170.

[0234] When the insulating teeth 500 of any one of the first insulating frame 300 and the second insulating frame 400 are provided with an extension portion 600, along the circumferential direction of the stator core 100, a gap value between the extension portions 600 of two adjacent insulating teeth 500 of the first insulating frame 300 is equal to a gap value between the extension portions 600 of two adjacent insulating teeth 500 of the second insulating frame 400.

[0235] The number of the first punching sheet group 160 is denoted as m, and the number of the second punching sheet group 170 is denoted as n. A first punching sheet group 160 is arranged between any two adjacent second punching sheet groups 170, m≥1, n≥2; the axial height of the first punching sheet group 160 is denoted as h1, and the axial height of the second punching sheet group 170 is denoted as h2, wherein 0.05<(m×h1) / (n×h2)<0.2. Since the slot width of the second punching sheet group 170 is reduced, there is a risk of increasing the magnetic leakage of the stator 10. Therefore, by limiting the optimal ratio of the axial height of the first punching sheet group 160 and the second punching sheet group 170, the risk of magnetic leakage can be minimized to the maximum extent, that is, the magnetic leakage can be reduced under the premise of ensuring the performance of the motor 1.

[0236] Optionally, the axial height of the stator core 100 is set to 25 mm, and the stator core 100 includes a first punching sheet group 160 and two second punching sheet groups 170. The axial height of the first punching sheet group 160 is 3 mm, and the axial height of the second punching sheet group 170 is 11 mm. Then, (m×h1) / (n×h2)=(1×3) / (2×11)≈0.14.

[0237] Optionally, the axial height of the stator core 100 is set to 55 mm, and the stator core 100 includes a first punching sheet group 160 and two second punching sheet groups 170. The axial height of the first punching sheet group 160 is 3 mm, and the axial height of the second punching sheet group 170 is 23.5 mm. Then, (m×h1) / (n×h2)=(1×3) / (2×23.5)≈0.06. Under this proportional relationship, the performance and reliability of the motor 1 can be taken into account.

[0238] The distance from the stator tooth 120 to the axis of the stator core 100 is recorded as D1, and the distance from the outer peripheral wall of the stator yoke 110 to the axis of the stator core 100 is recorded as D2, wherein 0.6≤D1 / D2≤0.7. By optimizing the split ratio of the motor 1, the main magnetic field provided by the permanent magnet 950 can be increased, and under the condition of the same back electromotive force, the number of turns of the winding 800 can be reduced, the anti-demagnetization ability of the motor 1 can be improved, and the reliability of the motor 1 can be further ensured.

[0239] like Fig.10 As shown, along the radial direction of the rotor 90, the value of the minimum gap between the outer peripheral wall of the rotor 90 and the inner peripheral wall of the stator 10 is recorded as δ, wherein 0.08<δ / d2<0.15. By optimizing the relationship between d2 and δ, the power density of the motor 1 can be maximized.

[0240] The stator core 100 includes a plurality of segmented cores, which are connected end to end around the axis of the stator core 100, and each segmented core includes a plurality of stacked punches. That is, the first punching sheet group 160 includes a plurality of first segmented punches, which are connected end to end around the axis of the stator core 100, the second punching sheet group 170 includes a plurality of second segmented punches, which are connected end to end around the axis of the stator core 100, and the third punching sheet group 200 includes a plurality of third segmented punches, which are connected end to end around the axis of the stator core 100. Along the axial direction of the stator core 100, each segmented core includes a first segmented punch, a second segmented punch, and a third segmented punch. This arrangement can greatly improve the slot fill rate of the motor 1, further improve the power density of the motor 1, and ensure that the product performance requirements are met without using heavy rare earth elements.

[0241] like Fig.11 As shown, the compressor 4 includes a cover plate 41, an inverter 42, a drive shaft 43, a suction port 44, a housing 45, a compression portion 46, and a discharge port 47. The compressor 4 includes an electric compressor.

[0242] The motor 1 is used to rotate the driving shaft 43. The motor 1 includes a stator 10 and a rotor 90.

[0243] The compression unit 46 is driven by the drive shaft 43 to compress the refrigerant.

[0244] The frequency converter 42 is used to control the permanent magnet synchronous motor.

[0245] The housing 45 has a cavity, and the motor 1 is disposed inside the cavity. The drive shaft 43 is fixed to the rotor 90 , and the rotor 90 is disposed inside the stator 10 , and the rotor 90 can rotate together with the drive shaft 43 .

[0246] The motor 1 can ensure both the power density and the reliability of the motor 1 without using heavy rare earth terbium.

[0247] The motor 1 of the present application can both ensure the power density of the motor 1 and reduce the amount of heavy rare earth elements used.

[0248] Optionally, along the axial direction of the stator core 100, the orthographic projection of the slot wall of the stator slot 130 of the third punching sheet group 200 on the second punching sheet group 170 is located outside the slot wall of the stator slot 130 of the second punching sheet group 170. The cross-sectional area of ​​the stator slot 130 of the third punching sheet group 200 is greater than the cross-sectional area of ​​the stator slot 130 of the second punching sheet group 170. That is, the slot wall of the stator slot 130 of the third punching sheet group 200 and the second punching sheet group 170 enclose a sink, that is, at least a portion of the slot wall of the stator slot 130 of the third punching sheet group 200 and the slot wall of the stator slot 130 of the second punching sheet group 170 form a stepped structure.

[0249] After the stator core 100, the first insulating frame 300 and the second insulating frame 400 are assembled, the first insulating frame 300 and the second insulating frame 400 are abutted in the sink, and the first insulating frame 300 and the second insulating frame 400 can be covered at the edge of the stator slot 130 of the third punching sheet group 200. In this way, on the basis of ensuring the performance of the motor 1, the height of the stator 10 can be reduced along the axial direction of the stator core 100, which is conducive to reducing the occupation rate of the stator 10 to the internal space of the motor 1, and is conducive to reducing the volume of the motor 1 and reducing the weight of the motor 1.

[0250] This arrangement is also beneficial to increasing the matching area and matching angle between the first insulating frame 300 , the second insulating frame 400 and the stator core 100 , and is beneficial to improving the stability and reliability of the matching between the first insulating frame 300 , the second insulating frame 400 and the stator core 100 .

[0251] In addition, this arrangement can shorten the length of each turn of the winding 800, reduce the amount of the winding 800 used, and reduce the production cost of the product.

[0252] The tooth surface 192 of at least one of the first punching sheet group 160, the second punching sheet group 170 and the third punching sheet group 200 includes an arc segment and a connecting segment, wherein the connecting segment is connected to one side of the arc segment in the circumferential direction of the stator core 100, and the arc segment is closer to the axis of the stator core 100 than the connecting segment.

[0253] The tooth surface 192 of the first punching sheet group 160 includes an arc segment and a connecting segment, or the tooth surface 192 of the second punching sheet group 170 includes an arc segment and a connecting segment, or the tooth surface 192 of the third punching sheet group 200 includes an arc segment and a connecting segment, or the tooth surface 192 of the first punching sheet group 160 and the tooth surface 192 of the second punching sheet group 170 both include an arc segment and a connecting segment, or the tooth surface 192 of the first punching sheet group 160 and the tooth surface 192 of the third punching sheet group 200 both include an arc segment and a connecting segment, or the tooth surface 192 of the second punching sheet group 170 and the tooth surface 192 of the third punching sheet group 200 both include an arc segment and a connecting segment, or any one of the tooth surface 192 of the first punching sheet group 160, the tooth surface 192 of the second punching sheet group 170 and the tooth surface 192 of the third punching sheet group 200 includes an arc segment and a connecting segment.

[0254] The connecting section is connected to one side of the circular arc section, and the connecting section and the circular arc section are arranged along the circumference of the stator core 100. The circular arc section is closer to the axis of the stator core 100 than the connecting section, that is, the distance from the circular arc section to the circumference of the stator core 100 is smaller than the distance from the connecting section to the axis of the stator core 100.

[0255] This arrangement realizes the chamfering of the tooth top of the tooth portion 190 of the stator core 100, which is beneficial to improving the distribution of the air gap synthetic magnetic field of the motor 1, can alleviate the armature reaction, and can enhance the torque output of the motor 1 under high-speed conditions.

[0256] Optionally, the connecting segment includes any one of the following or a combination thereof: a plane segment, a folded surface segment and a curved surface segment.

[0257] For example, the connecting segment includes a plane segment. For example, the connecting segment includes a folded surface segment. For example, the connecting segment includes a curved surface segment. For example, the connecting segment includes a plane segment and a folded surface segment. For example, the connecting segment includes a plane segment and a curved surface segment. For example, the connecting segment includes a folded surface segment and a curved surface segment. For example, the connecting segment includes a plane segment, a folded surface segment and a curved surface segment.

[0258] This arrangement can meet the use requirement that the distance from the connecting segment to the axis of the stator core 100 is greater than the distance from the arc segment to the axis of the stator core 100 , and can improve the armature reaction.

[0259] Optionally, along the radial direction of the rotor 90, the value of the minimum gap between the outer peripheral wall of the rotor 90 and the inner peripheral wall of the stator 10 is recorded as δ, wherein 0.08<δ / d2<0.15. By optimizing and limiting the ratio of the slot width of the second punching sheet group 170 to the gap between the stator and the rotor 90, the power density of the motor 1 can be guaranteed, the radial force density of the motor 1 can be improved, and the noise of the motor 1 can be ensured not to deteriorate.

[0260] If δ / d2 is less than or equal to 0.08, the air gap magnetic flux density of the motor 1 will increase, the radial force density of the motor 1 will increase, and the operating noise of the motor 1 will increase.

[0261] If δ / d2 is greater than or equal to 0.15, the magnetic resistance is large, the energy consumption of the motor 1 is large, the output torque of the motor 1 is reduced, and the performance of the motor 1 is reduced.

[0262] Optionally, the core body 910 includes multiple pole center lines, each slot group 940 is located at a pole center line, a portion of the slots 942 of the slot group 940 are located on the windward side of the pole center line, and another portion of the slots 942 of the slot group 940 are located on the leeward side of the pole center line.

[0263] The core body 910 includes a plurality of magnetic pole center lines, and any of the plurality of magnetic pole center lines has a windward side and a leeward side.

[0264] For example, a line connecting the center of the magnet slot group 930 and the center of the axial hole 920 of the core body 910 constitutes a magnetic pole center line, which is referred to as the d-axis.

[0265] It can be understood that the rotor 90 rotates in the direction from the leeward side of the magnetic pole centerline to the windward side of the magnetic pole centerline. It can also be said that the windward side of the magnetic pole centerline is the leading side of the magnetic pole centerline, and the leeward side of the magnetic pole centerline is the lagging side of the magnetic pole centerline.

[0266] By reasonably setting the matching structure of the odd number of slits 942 of the slit group 940 and the magnetic pole center line, a part of the slits 942 of the slit group 940 are located on the windward side of the magnetic pole center line, and another part of the slits 942 of the slit group 940 are located on the leeward side of the magnetic pole center line. That is, the slits 942 are arranged on both the windward side and the leeward side of the magnetic pole center line. In other words, the arrangement positions of the odd number of slits 942 of the slit group 940 relative to the magnetic pole center line are divided. Since the number of slits 942 in each slit group 940 is an odd number, and the odd number of slits 942 are distributed on opposite sides of the magnetic pole center line (i.e., the windward side of the magnetic pole center line and the leeward side of the magnetic pole center line), then the windward side of the magnetic pole center line is arranged with an even number of slits 942, and the leeward side of the magnetic pole center line is arranged with an odd number of slits 942, or the windward side of the magnetic pole center line is arranged with an odd number of slits 942, and the leeward side of the magnetic pole center line is arranged with an even number of slits 942. In other words, the odd number of slits 942 of the slit group 940 are arranged asymmetrically along the corresponding magnetic pole center line.

[0267] Optionally, the number of slit groups 940 is an even number, the number of magnet slot groups 930 is an even number, the number of slit groups 940 matches the number of magnet slot groups 930, and each magnet slot group 930 cooperates with one slit group 940. The straight line where the center line of the magnetic pole is located cooperates with two slit groups 940, and the two slit groups 940 are respectively recorded as the first slit group and the second slit group, and the axis of the core body 910 is located between the first slit group and the second slit group. After the first slit group rotates 180° along the rotation direction of the rotor 90, the slits 942 of the first slit group overlap with the slits 942 of the second slit group. Similarly, after the second slit group rotates 180° along the rotation direction of the rotor 90, the slits 942 of the second slit group overlap with the slits 942 of the first slit group.

[0268] This arrangement ensures that the center of mass of the rotor 90 does not deviate from the center of rotation during rotation, and can maintain the dynamic balance of the motor 1. There will be no phenomenon of increased local wear, and the noise improvement effect is obvious.

[0269] Taking the 12-slot 8-pole motor 1 as an example, the odd number of slits 942 of the slit group 940 are asymmetrically arranged along the center line of the magnetic pole, and the radial force density of the 4th order 16-fold mechanical frequency is reduced by 53%. The noise in this frequency band of the compressor 4 is reduced by 5dB, and the noise improvement effect is obvious.

[0270] Optionally, the number of the slits 942 located on the windward side is greater than the number of the slits 942 located on the leeward side. This arrangement is beneficial for reducing the no-load cogging torque and load electromagnetic torque pulsation of the motor 1.

[0271] Optionally, the number of slits 942 located on the windward side is an even number, and the number of slits 942 located on the leeward side is an odd number. This setting can meet the use requirements of the odd number of slits 942 of the slit group 940 being arranged asymmetrically with the corresponding magnetic pole center line. This setting can ensure that the waveform of the air gap magnetic density of the motor 1 under load conditions is close to sine, thereby reducing the torque pulsation during the operation of the motor 1. Improve the vibration noise during the operation of the motor 1. At the same time, this setting can ensure the dynamic balance of the rotor 90 during the rotation process, reduce the swing of the shaft structure of the compressor 4, and can 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 conducive to improving the operating efficiency of the motor 1, and on the other hand, it can improve the vibration noise of the motor 1, thereby reducing the operating noise of the compressor 4.

[0272] Optionally, each slit group 940 includes a plurality of first slits and a second slit, wherein the plurality of first slits are symmetrically arranged with the magnetic pole center line as the symmetry axis, and the second slit is located on one side of the plurality of first slits. This arrangement can meet the use requirement that the odd number of slits 942 of the slit group 940 are asymmetrically arranged with the corresponding magnetic pole center line.

[0273] Specifically, the two first slits are symmetrically arranged with the center line of the magnetic pole as the axis of symmetry. Each first slit includes a first end 140 and a second end 150. The first ends 140 of the two first slits are adjacent to each other, the second ends 150 of the two first slits are far away from each other, and the second ends 150 are located between the first ends 140 and the magnet slot group 930. That is, the two first slits are configured into an "eight" shaped structure. And the angle formed between the two first slits is recorded as α, and the angle α is an acute angle. This arrangement reasonably utilizes the existing arrangement structure of the core body 910 to ensure the occupancy rate of the slit group 940 to the core body 910.

[0274] Specifically, the magnet slot includes two slot bodies, each of which includes a third end and a fourth end. The third ends of the two slot bodies are far away from each other, and the fourth ends of the two slot bodies are close to each other, and the fourth end is located between the third end and the axis of the core body 910. That is, the two slot bodies are configured in a "V" shape. The angle formed between the first slit and the slot body on the same side of the magnetic pole centerline is recorded as β, and the angle β is an acute angle.

[0275] The stator tooth 120 includes a tooth body and a tooth shoe, wherein the tooth body extends in the radial direction of the core body 910, the tooth shoe is connected to the tooth body, and the tooth shoe is located at the circumferential end surface of the tooth body. Along the circumference of the core body 910, the width of the tooth body is Bt.

[0276] The width of the permanent magnet 950 along the circumferential direction of the core body 910 is denoted as H.

[0277] By reasonably setting the angle α formed between the two first slits, the angle β formed between the first slit on the same side of the magnetic pole centerline and the slot body, the circumferential width H of the permanent magnet 950 and the circumferential width Bt of the tooth body, the relationship is satisfied: H<α / β×Bt≤3.4mm, and 1.5mm≤H≤2mm. This setting can reduce the no-load tooth slot torque of the motor 1 and reduce the load torque pulsation. At the same time, this setting can ensure that the magnetic field at the stator core 100 will not be oversaturated, which is beneficial to improving the output capacity of the motor 1.

[0278] Optionally, the second slit is located on the windward side of the magnetic pole center line. The slit group 940 includes a plurality of first slits and a second slit. The plurality of first slits are symmetrically arranged with the magnetic pole center line as a symmetry axis, and the second slit is located on the windward side of the magnetic pole center line.

[0279] That is to say, the number of slits 942 located on the windward side of the center line of the magnetic pole is greater than the number of slits 942 located on the leeward side of the center line of the magnetic pole. This setting can ensure that the waveform of the air gap magnetic density of the motor 1 under load conditions is close to a sine wave, thereby reducing the torque pulsation during the operation of the motor 1. Improve the vibration noise during the operation of the motor 1. At the same time, this setting can ensure the dynamic balance of the rotor 90 during the rotation process, reduce the swing of the shaft structure of the compressor 4, and can 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 operating efficiency of the motor 1. On the other hand, it can improve the vibration noise of the motor 1, thereby reducing the operating noise of the compressor 4.

[0280] Optionally, the first slit located on the windward side is arranged close to the center line of the magnetic pole, and the second slit is located on a side of the first slit away from the center line of the magnetic pole.

[0281] The matching structure of the first slit and the second slit located on the windward side is defined so that the first slit located on the windward side is arranged close to the magnetic pole center line, and the second slit is located on the side of the first slit away from the magnetic pole center line. That is, the second slit is located outside the first slit. In other words, the first slit is closer to the magnetic pole center line than the second slit.

[0282] The load of the compressor 4 is not constant but changes periodically, so that the second slit is located outside the first slit, which is more conducive to making the waveform of the air gap magnetic density of the motor 1 close to the sine under the load condition, thereby reducing the torque pulsation during the operation of the motor 1 and improving the vibration noise during the operation of the motor 1. At the same time, the asymmetric structural form can ensure the dynamic balance of the rotor 90 during the rotation process, reduce the swing of the shaft structure of the compressor 4, and effectively improve the content of each harmonic of the air gap magnetic density of the motor 1.

[0283] Optionally, the second slit is closer to the magnetic pole centerline than the first slit. That is, the second slit is arranged close to the magnetic pole centerline, and the first slit is arranged away from the magnetic pole centerline. It can also be said that the distance from the second slit to the magnetic pole centerline is less than the distance from the first slit located on the windward side to the magnetic pole centerline, and the second slit is located on the inner side of the first slit.

[0284] The load of the compressor 4 is not constant but changes periodically. This setting makes the waveform of the air gap magnetic density of the motor 1 close to the sine under the load condition, thereby reducing the torque pulsation during the operation of the motor 1 and improving the vibration noise during the operation of the motor 1. At the same time, the asymmetric structural form can ensure the dynamic balance of the rotor 90 during the rotation process, reduce the swing of the shaft system structure of the compressor 4, and effectively improve the content of each harmonic of the air gap magnetic density of the motor 1.

[0285] Optionally, on the axial end surface of the core body 910, there is an interpolar centerline between adjacent magnet slot groups 930 in the plurality of magnet slot groups 930; along the radial direction of the rotor 90, the value of the minimum gap between the outer peripheral wall of the rotor 90 and the inner peripheral wall of the stator 10 is recorded as gmin, and the minimum gap is located at the magnetic pole centerline of the core body 910, and the value of the maximum gap between the outer peripheral wall of the rotor 90 and the inner peripheral wall of the stator 10 is recorded as gmax, and the maximum gap is located at the limit centerline; wherein, 0.6≤gmin / gmax≤0.8. Due to the manufacturing process limitations, the value of the minimum gap between the outer peripheral wall of the rotor 90 and the inner peripheral wall of the stator 10 is gmin≥0.4mm. Assuming gmin=0.45mm, the value of gmin / gmax is too small, gmax is large, the equivalent air gap of the motor 1 increases, and the effective output torque deteriorates. The value of gmin / gmax is too large, gmax is small, the air gap magnetic density of the motor 1 is high, and the 2-fold radial force density deteriorates, which is not conducive to the noise improvement of the motor 1. like Fig.15 As shown, the present application further optimizes the back EMF waveform of the motor 1, improves the torque pulsation of the motor 1 under load conditions, has the effect of improving the operating noise of the motor 1 and the compressor 4, and optimizes the 2-fold frequency radial force density.

[0286] Specifically, the center line between poles is also called the center line of adjacent magnetic poles, referred to as the q-axis.

[0287] Optionally, gmin / gmax=0.62, gmin / gmax=0.64, gmin / gmax=0.66, gmin / gmax=0.68, gmin / gmax=0.7, gmin / gmax=0.72, gmin / gmax=0.74, gmin / gmax=0.76 and gmin / gmax=0.78, etc., which are not listed here one by one.

[0288] Optionally, Mp, Mc, Ub and X% satisfy: 0.14×Ke≤(Mp / Mc)×Ub×X%≤0.69×Ke. In this way, the cost performance of the motor 1 can be improved while reducing the influence of the armature reaction when the motor 1 is loaded, and enhancing the load capacity of the motor 1 at high speed and weak magnetic field.

[0289] Optionally, the weight of the core body 910 is recorded as Mr, wherein 0.17≤Mp / Mr≤0.26. This can ensure that the permanent magnetic field strength of the rotor 90 is within a reasonable range, which is beneficial to improving the torque output capacity of the motor 1.

[0290] Optionally, the mass percentage of cerium in the permanent magnet 950 satisfies: 2%<X%<6%. This setting takes into account both the performance of the motor 1 and the production cost of the motor 1.

[0291] That is, the addition of the low-priced and abundant cerium element to the permanent magnet 950 can reduce the use of expensive and scarce heavy rare earths, thereby reducing the production cost of the motor 1. In other words, the cost of the permanent magnet 950 can be reduced while ensuring the performance of the motor 1, thereby improving the cost performance of the motor 1.

[0292] If the mass percentage of cerium in the permanent magnet 950 is greater than or equal to 6%, the coercive force of the permanent magnet 950 decreases, which will reduce the magnetic energy product of the permanent magnet 950 and weaken the magnetic properties of the rotor 90, which will in turn affect the anti-demagnetization ability and efficiency of the motor 1, causing demagnetization of the rotor 90 during operation, thereby reducing the reliability and stability of the motor 1.

[0293] If the mass percentage of cerium in the permanent magnet 950 is less than or equal to 2%, the degree of replacement of praseodymium with neodymium is limited, which limits the extent of reducing the production cost of the motor 1.

[0294] Specifically, the mass percentage of cerium in the permanent magnet 950 includes 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, etc., which are not listed here one by one.

[0295] Optionally, the maximum allowable operating voltage Ub=650 V, or the maximum allowable operating voltage Ub=1200 V. The value of the maximum allowable operating voltage of the power device of the controller of the motor 1 is further limited.

[0296] Optionally, the maximum allowable operating voltage Ub=650V, or the maximum allowable operating voltage Ub=1200V.

[0297] The power devices of the controller of the motor 1 include, but are not limited to, SiC (silicon carbide) power devices, IGBT (Insulated Gate Bipolar Transisitor) and GaN (gallium nitride) power devices.

[0298] The maximum allowable operating voltage of the power device of the controller is equal to 650V, or the maximum allowable operating voltage of the power device of the controller is equal to 1200V. At this time, the efficiency of the controller of the motor 1 is relatively high. When the maximum allowable operating voltage of the power device is 650V, it can be used in occasions where the rated output DC voltage of the battery pack is 500V or less. When the maximum allowable operating voltage of the power device is 1200V, it can be used in occasions where the rated output DC voltage of the battery pack is 800V or less. The withstand voltage levels of power devices with a maximum allowable operating voltage of 650V and power devices with a maximum allowable operating voltage of 1200V can cover the current common new energy electric vehicle application scenarios, and can give full play to the efficiency advantages of the motor 1. Optionally, the residual magnetic flux density Br of the permanent magnet 950 at 20°C satisfies: 1.2T≤Br≤1.5T. The structure of the permanent magnet 950 is further defined so that the residual magnetic flux density of the permanent magnet 950 at 20°C is recorded as Br, Br is greater than or equal to 1.2T, and Br is less than or equal to 1.5T. This setting can ensure that the magnetic field strength of the rotor 90 is within a reasonable range. Since the magnetic field of the rotor 90 is not adjustable, if the residual magnetic flux density Br of the permanent magnet 950 at 20°C is greater than 1.5T, the high-speed weak magnetic operation of the motor 1 will be limited. If the residual magnetic flux density Br of the permanent magnet 950 at 20°C is lower than 1.2T, the motor 1 cannot provide sufficient output capacity.

[0299] Optionally, the intrinsic coercive force Hcj of the permanent magnet 950 at 20°C satisfies: 21.3kOe≤Hcj≤25.2kOe. The structure of the permanent magnet 950 is further limited so that the intrinsic coercive force of the permanent magnet 950 at 20°C is recorded as Hcj, Hcj is greater than or equal to 21.3kOe, and Hcj is less than or equal to 25.2kOe. The intrinsic coercive force of the permanent magnet 950 is a key indicator for measuring the anti-demagnetization ability of the permanent magnet 950. If Hcj is less than 21.3kOe, the anti-demagnetization ability of the permanent magnet 950 is weak, and irreversible demagnetization will occur during the operation of the motor 1. If Hcj is greater than 25.2kOe, the use of heavy rare earths will increase, and the cost will increase sharply, which is not conducive to improving the cost performance of the motor 1. Figure 2 and Figure 3As shown, slot insulation paper 700 includes phase insulation 710 .

[0300] In this application, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "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 this application can be understood according to the specific circumstances.

[0301] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A stator, characterized in that: include: A stator core, the stator core comprising a stator yoke and a plurality of stator teeth, each of the stator teeth being connected to an inner peripheral wall of the stator yoke, the plurality of stator teeth being arranged at intervals around an axis of the stator core, two adjacent stator teeth and the stator yoke enclosing a stator slot, and the stator core having a first axial end and a second axial end; a first insulating frame, disposed at the first end; a second insulating frame, disposed at the second end, wherein either the first insulating frame or the second insulating frame comprises a plurality of insulating teeth, each of the stator teeth is connected to one of the insulating teeth, and the insulating teeth of at least one of the first insulating frame and the second insulating frame are provided with an extension portion, and the extension portion is located at a notch of the stator slot; Slot insulation paper is arranged in the stator slot, and the slot insulation paper abuts against the extension part, and the extension part can at least limit the slot insulation paper in the radial direction of the stator core; Wherein, along the circumferential direction of the stator core, the gap value between the extension portions of two adjacent insulating teeth is recorded as d01, and the slot width of the stator slot is recorded as T, wherein d01<T.

2. The stator according to claim 1, characterized in that: The extension portion is connected to a slot wall of the stator slot.

3. The stator according to claim 1 or 2, characterized in that: The insulating tooth provided with the extension portion comprises a tooth body, the tooth body is provided with a slot, and the end of the stator tooth is inserted into the slot; The extension portion is connected to the end face of the tooth body facing the axis of the stator core, and the extension portion includes two extension sections, which are arranged at intervals in the circumferential direction of the stator core, each of the extension sections extends into the slot opening of a stator slot, and each of the extension sections abuts against the slot insulation paper.

4. The stator according to claim 1 or 2, characterized in that: When the insulating teeth of either the first insulating frame or the second insulating frame are provided with the extension portion, along the circumferential direction of the stator core, the gap value of the extension portions of two adjacent insulating teeth of the first insulating frame is equal to the gap value of the extension portions of two adjacent insulating teeth of the second insulating frame.

5. The stator according to claim 1 or 2, characterized in that: The stator core comprises: The first punching group; A second punching sheet group, along the axial direction of the stator core, the second punching sheet group is stacked on one side of the first punching sheet group, and the second punching sheet group is closer to the end of the stator core than the first punching sheet group, and either the first punching sheet group or the second punching sheet group includes: an annular yoke, the stator yoke comprising the annular yoke; A plurality of tooth portions, wherein the tooth portions are connected to the inner peripheral wall of the annular yoke portion, each of the stator teeth comprises one tooth portion, and the end surface of the tooth portion facing the axis of the stator core is a tooth surface; Along the circumferential direction of the stator core, a gap value between two adjacent tooth surfaces of the first punching sheet group is different from a gap value between two adjacent tooth surfaces of the second punching sheet group.

6. The stator according to claim 5, characterized in that: Along the circumferential direction of the stator core, the gap value between two adjacent tooth surfaces of the first punching sheet group is recorded as d1, and the gap value between two adjacent tooth surfaces of the second punching sheet group is recorded as d2, wherein d2>d1≥d01.

7. The stator according to claim 6, characterized in that The d1 and the d2 satisfy: 1.5<d2 / d1<3.

8. The stator according to claim 6, characterized in that: The stator core further comprises: a third punching sheet group, wherein the second punching sheet group is located between the first punching sheet group and the third punching sheet group; The third punching sheet group includes the annular yoke and the plurality of tooth portions. Along the circumferential direction of the stator core, the gap value between two adjacent tooth surfaces of the third punching sheet group is recorded as d3, wherein d3>d2.

9. The stator according to claim 5, characterized in that: The number of the first punching sheet groups is recorded as m, the number of the second punching sheet groups is recorded as n, and one first punching sheet group is arranged between any two adjacent second punching sheet groups, m≥1, n≥2; The axial height of the first punching sheet group is recorded as h1, and the axial height of the second punching sheet group is recorded as h2; Among them, 0.05<(m×h1) / (n×h2)<0.

2.

10. The stator according to claim 1 or 2, characterized in that: The distance from the stator teeth to the axis of the stator core is recorded as D1, and the distance from the outer peripheral wall of the stator yoke to the axis of the stator core is recorded as D2, wherein 0.6≤D1 / D2≤0.

7.

11. A motor, characterized in that: include: The stator according to any one of claims 1 to 10, wherein the plurality of stator teeth enclose an assembly cavity; A rotor is rotatably arranged in the assembly cavity.

12. The motor according to claim 11, characterized in that The rotor comprises: Core body; An axial hole is provided in the core body; A plurality of magnet slot groups are provided on the core body, and the plurality of magnet slot groups are arranged at intervals around the shaft hole; A plurality of slit groups are provided on the core body, one slit group is arranged between each magnet slot group and the outer peripheral wall of the core body, and the slit group includes an odd number of slits.

13. The motor according to claim 12, characterized in that The rotor further comprises a plurality of permanent magnets, each of the magnet slot groups is provided with one permanent magnet, and the permanent magnets contain X% cerium by mass; The stator further comprises a winding, wherein the winding is wound on the plurality of stator teeth; The weight of the multiple permanent magnets is denoted as Mp, the weight of the winding is denoted as Mc, the back electromotive force value of the motor at a rotation speed of 1000 rpm is denoted as Ke, and the maximum allowable operating voltage of the power device of the controller of the motor is denoted as Ub, wherein (Mp / Mc)×Ub×X%≤Ke.

14. A compressor, characterized in that: include: A motor as claimed in any one of claims 11 to 13.

15. A vehicle, characterized in that: include: The compressor of claim 14.

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