Stator core, motor stator, motor and vehicle

Abstract

The invention discloses a stator core, a motor stator, a motor and a vehicle. The stator core comprises a stator yoke part; a plurality of stator tooth parts, the plurality of stator tooth parts are arranged on the inner circumferential wall of the stator yoke part and are distributed at intervals along the circumferential direction of the stator yoke part, and two adjacent stator tooth parts and the inner circumferential wall of the stator yoke part jointly define a stator tooth groove for accommodating a stator winding; wherein a cooling flow channel which is open towards the interior of the stator tooth groove is formed in the inner circumferential wall of the stator yoke part, the cooling flow channel comprises a plurality of turbulent flow sections which are sequentially distributed in the axial direction of the stator yoke part, and at least parts of at least two turbulent flow sections are staggered in the axial direction of the stator yoke part. According to the stator iron core, the cooling liquid in the cooling flow channel can be disturbed, the fluid disturbance effect is enhanced, the heat exchange efficiency is improved, and a flowing dead zone is avoided, so that the cooling effect is greatly improved, and the stator iron core is simple in structure, low in manufacturing cost and wide in application range.

Description

Technical Field

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

[0002] The stator core is a key component in the motor. It plays an important role in the operation of the motor and is an important part of the motor's magnetic circuit. Together with the rotor core, the air gap between the stator and the rotor, it forms a complete magnetic circuit of the motor. When the motor is running, the stator winding will generate heat and the temperature will rise. The stator winding needs to be cooled. Generally, a cooling channel is set up to allow a cold medium to flow in the cooling channel to cool the stator winding.

[0003] In the prior art, some cooling channels have small flow disturbances and large flow resistance, which will produce flow dead zones between stator windings and deteriorate the cooling effect; some have the problem of uneven distribution of cooling medium flow and are prone to flow dead zones. The existing cooling channels have poor cooling effects and there is room for improvement. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a stator core, which can disturb the coolant in the cooling channel, enhance the fluid disturbance effect, improve the heat exchange efficiency, avoid the formation of flow dead zones, thereby greatly improving the cooling effect, and has a simple structure, low manufacturing cost, and a wide range of applications.

[0005] According to an embodiment of the present invention, a stator core comprises: a stator yoke portion; a stator tooth portion, wherein the stator tooth portion is multiple, and the multiple stator tooth portions are arranged on the inner circumferential wall of the stator yoke portion and are distributed at intervals along the circumference of the stator yoke portion, and two adjacent stator tooth portions and the inner circumferential wall of the stator yoke portion jointly define a stator tooth slot for accommodating a stator winding; wherein the inner circumferential wall of the stator yoke portion is formed with a cooling flow channel open to the stator tooth slot, and the cooling flow channel comprises a plurality of spoiler segments distributed in sequence along the axial direction of the stator yoke portion, and at least parts of at least two of the spoiler segments are staggered in the axial direction of the stator yoke portion.

[0006] According to the stator core of the embodiment of the present invention, a cooling channel open to the stator tooth slots is provided on the inner circumferential wall of the stator yoke to achieve rapid cooling of the stator winding and the stator core when the coolant flows in the cooling channel. A cooling channel including a plurality of spoiler segments distributed in sequence along the axial direction of the stator yoke is provided, and at least parts of at least two spoiler segments are staggered in the axial direction of the stator yoke to turbulently disturb the coolant in the cooling channel, thereby enhancing the fluid disturbance effect, so that the coolant can be more intensely mixed and exchanged, thereby improving the heat exchange efficiency and avoiding the formation of a dead zone in the channel, thereby greatly improving the cooling effect. The structure is simple, the manufacturing cost is low, and the application range is wide.

[0007] According to the stator core of some embodiments of the present invention, a side guide port is formed at the connection between two adjacent spoiler segments, a spoiler surface is formed at the outlet end of one of the spoiler segments located upstream, and the coolant in one of the spoiler segments located upstream is suitable for flowing through the side guide port into one of the spoiler segments located downstream under the guidance of the spoiler surface.

[0008] According to the stator core of some embodiments of the present invention, an angle between the spoiler surface and an extending direction of the spoiler section is greater than 45°.

[0009] In the stator core according to some embodiments of the present invention, the spoiler surface is perpendicular to an extending direction of the spoiler section.

[0010] According to the stator core of some embodiments of the present invention, the extension directions of two adjacent spoiler segments are parallel, and the opening direction of the side guide port is perpendicular to the extension direction of the spoiler segment.

[0011] According to the stator core of some embodiments of the present invention, at least a portion of an outlet end of an upstream spoiler segment and an inlet end of a downstream spoiler segment are directly opposite in the opening direction of the side guide port.

[0012] According to the stator core of some embodiments of the present invention, a plurality of spoiler segments are distributed in groups to form a plurality of spoiler groups connected along the axial direction of the stator yoke, and each of the spoiler groups includes: a first spoiler segment; a second spoiler segment and / or a third spoiler segment, the second spoiler segment is connected to the first spoiler segment, and the second spoiler segment is located on one side of the extension direction of the first spoiler segment, and the third spoiler segment is connected to the first spoiler segment, and the third spoiler segment is located on the other side of the extension direction of the first spoiler segment.

[0013] According to the stator core of some embodiments of the present invention, each of the spoiler groups includes one first spoiler segment and two second spoiler segments, and the two second spoiler segments are respectively connected to the two ends of one first spoiler segment; and / or each of the spoiler groups includes one first spoiler segment, one second spoiler segment and one third spoiler segment, and one second spoiler segment and one third spoiler segment are respectively connected to the two ends of one first spoiler segment.

[0014] According to the stator core of some embodiments of the present invention, the width of the second spoiler segment is the same as the width of the first spoiler segment, and the width of the third spoiler segment is the same as the width of the first spoiler segment; and / or the extension length of the second spoiler segment is the same as the extension length of the third spoiler segment.

[0015] According to the stator core of some embodiments of the present invention, a plurality of the spoiler segments are distributed in groups and form a plurality of spoiler groups connected along the axial direction of the stator yoke, each of the spoiler groups includes: a main spoiler segment; two side spoiler segments, the two side spoiler segments are distributed apart and respectively connected to the main spoiler segment, and the two side spoiler segments are respectively located on both sides of the extension direction of the main spoiler segment.

[0016] According to the stator core of some embodiments of the present invention, the two side spoiler segments are symmetrically distributed on both sides of the extension direction of the main spoiler segment.

[0017] According to the stator core of some embodiments of the present invention, the sum of the widths of the two side spoiler sections is greater than or equal to the width of the main spoiler section.

[0018] According to the stator core of some embodiments of the present invention, the stator yoke is also provided with an inlet and an outlet; one end of the cooling channel is connected to the inlet and the other end is connected to the outlet; or, there are two outlets, the middle part of the cooling channel is connected to the inlet, and the two ends of the cooling channel are respectively connected to one of the outlets.

[0019] The invention also provides a motor stator.

[0020] A motor stator according to an embodiment of the present invention comprises a stator winding and the stator core described in any one of the above embodiments, wherein the stator winding is arranged in the stator tooth slot.

[0021] The invention also provides a motor.

[0022] The motor according to the embodiment of the present invention is provided with the motor stator described above.

[0023] The present invention also provides a vehicle.

[0024] The vehicle according to the embodiment of the present invention is provided with the motor described above.

[0025] The motor stator, the motor and the vehicle have the same advantages as the above-mentioned stator core relative to the prior art, which will not be described in detail here.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a schematic structural diagram of a stator core according to an embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of a cooling channel according to an embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of another stator core according to an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of another cooling channel according to an embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the structure of a motor stator according to an embodiment of the present invention.

[0033] Reference numerals:

[0034] Motor stator 100, stator core 101, stator winding 102,

[0035] stator yoke 1, stator tooth 2, stator tooth slot 3,

[0036] Cooling channel 4, spoiler section 41, side guide port 42, spoiler surface 43,

[0037] Spoiler group 44, first spoiler segment 441, second spoiler segment 442, third spoiler segment 443,

[0038] Main spoiler section 444 and side spoiler section 445 . DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Reference below Figure 1-Figure 5 The stator core 101 according to an embodiment of the present invention is described. The stator core 101 can disturb the coolant in the cooling channel 4, enhance the fluid disturbance effect, improve the heat exchange efficiency, avoid the formation of flow dead zones, thereby greatly improving the cooling effect, and has a simple structure, low manufacturing cost, and a wide range of applications.

[0043] like Figure 1-Figure 5 As shown, a stator core 101 according to an embodiment of the present invention includes: a stator yoke portion 1 and a stator tooth portion 2 .

[0044] The stator yoke 1 is used to connect and support the stator teeth 2. The stator yoke 1 is located at the periphery of the stator teeth 2 and provides a path for the magnetic flux in the magnetic circuit so that the magnetomotive force can be smoothly transmitted inside the motor. It should be noted that the stator yoke 1 needs to have a certain thickness so that the magnetic circuit will not be saturated, thereby ensuring the normal operation of the motor.

[0045] The stator teeth 2 are protruding parts on the stator core 101. There are multiple stator teeth 2, that is, the stator teeth 2 can be set to two, three, four or even more. Providing multiple stator teeth 2 is conducive to the generation of magnetic field and can reduce magnetic flux leakage.

[0046] A plurality of stator teeth 2 are arranged on the inner circumferential wall of the stator yoke 1 and are spaced apart and distributed along the circumferential direction of the stator yoke 1 . Two adjacent stator teeth 2 and the inner circumferential wall of the stator yoke 1 together define a stator tooth slot 3 for accommodating the stator winding 102 .

[0047] like Figure 1 As shown, a plurality of stator teeth 2 are arranged on the inner circumferential wall of the stator yoke 1 to protrude inwardly, and are evenly distributed at a certain distance along the circumference of the stator yoke 1. The inner side walls of two adjacent stator teeth 2 and the inner circumferential wall of the stator yoke 1 jointly define a stator tooth slot 3. The shape and size of the stator tooth slot 3 are adapted to the shape and size of the stator winding 102, so that a plurality of stator windings 102 can be correspondingly installed in the plurality of stator tooth slots 3. With such an arrangement, the stator winding 102 is evenly distributed on the stator yoke 1, so that a uniform rotating magnetic field can be generated.

[0048] In practice, when the stator winding 102 is energized, a rotating magnetic field is generated around the stator teeth 2 , and the rotating magnetic field interacts with the rotor magnetic field to generate an electromagnetic torque, driving the motor to rotate.

[0049] Furthermore, the inner circumferential wall of the stator yoke 1 is formed with a cooling channel 4 which is open toward the stator tooth slots 3, and the cooling channel 4 includes a plurality of spoiler segments 41 which are distributed in sequence along the axial direction of the stator yoke 1, and at least parts of at least two spoiler segments 41 are staggered in the axial direction of the stator yoke 1.

[0050] Specifically, when the current flows in the stator winding 102, it will encounter the resistance of the stator winding 102, thereby generating heat, and the greater the current, the greater the resistance, the more heat generated, and various frictions and losses will also be generated during the operation of the motor, resulting in an increase in the temperature of the stator winding 102. The cooling channel 4 is used to cool the stator winding 102, wherein the cooling channel 4 is distributed along the axial extension of the stator yoke 1, and a groove open to the stator tooth slot 3 is formed on the inner peripheral wall of the stator yoke 1, that is, the cooling channel 4, and the coolant can flow in the cooling channel 4. The coolant can be water, oil, etc. The coolant can exchange heat with the stator winding 102 to reduce the temperature of the stator winding 102 and transfer its temperature to the coolant. The coolant circulates to take away the heat generated by the stator winding 102, thereby cooling the stator core 101 and the stator winding 102, and preventing overheating from causing performance degradation or damage to the stator core 101.

[0051] The cooling channel 4 includes a plurality of spoiler segments 41 distributed in sequence along the axial direction of the stator yoke 1, that is, the cooling channel 4 may include one, two, three, four or even more spoiler segments 41, and the spoiler segments 41 are distributed in sequence along the axial direction of the stator yoke 1. When the coolant flows along the cooling channel 4, it flows through each spoiler segment 41 from one end of the stator yoke 1 to the other end to cool the stator winding 102 and the stator core 101, and the spoiler segment 41 can turbulently flow the coolant to avoid the generation of flow dead zones to deteriorate the cooling effect. By setting a plurality of spoiler segments 41, the turbulence effect can be improved, heat can be quickly transferred to the coolant, and the heat exchange efficiency can be improved.

[0052] Among them, at least part of at least two spoiler segments 41 is staggered in the axial direction of the stator yoke 1, that is, the two spoiler segments 41 are not aligned and distributed along the axial direction of the stator yoke 1, but are partially staggered or offset. In this way, the spoiler effect on the coolant can be further enhanced. When the coolant flows through each spoiler segment 41, the coolant is deflected, and the spoiler effect on the coolant is further enhanced, so that the coolant can be mixed and exchanged more strongly, that is, the mixing effect of the coolant can be enhanced, thereby avoiding local overheating, improving heat exchange efficiency, and realizing rapid cooling of the stator winding 102 and the stator core 101, greatly improving the cooling effect.

[0053] In actual design, the stator winding 102 may be treated with varnish to prevent the coolant from entering the gaps of the stator winding 102 , thereby preventing the coolant from entering the rotor rotation area and affecting the rotor.

[0054] And in the stator core 101 of the present embodiment, since the cooling channel 4 is open toward the inside of the stator tooth slot 3, when the cooling structure is working, the coolant is close to the stator winding 102, that is, close to the heat source body, and the heat generated by the stator winding 102 can be discharged in a relatively short time, thereby realizing direct cooling of the stator winding 102 and further improving the heat exchange efficiency.

[0055] According to the stator core 101 of the embodiment of the present invention, a cooling channel 4 open to the stator tooth slot 3 is provided on the inner circumferential wall of the stator yoke 1, so that when the coolant flows in the cooling channel 4, the stator winding 102 and the stator core 101 can be quickly cooled and cooled. The cooling channel 4 is provided with a plurality of spoiler segments 41 distributed in sequence along the axial direction of the stator yoke 1, and at least parts of at least two spoiler segments 41 are staggered in the axial direction of the stator yoke 1, so as to turbulent the coolant in the cooling channel 4 and enhance the fluid disturbance effect, so that the coolant can be more intensely mixed and exchanged, the heat exchange efficiency is improved, and the formation of flow dead zones is avoided, thereby greatly improving the cooling effect. The structure is simple, the manufacturing cost is low, and the application range is wide.

[0056] In some embodiments, a side guide port 42 is formed at the connection between two adjacent spoiler sections 41, a spoiler surface 43 is formed at the outlet end of an upstream spoiler section 41, and the coolant in the upstream spoiler section 41 is suitable for flowing through the side guide port 42 to the downstream spoiler section 41 under the guidance of the spoiler surface 43.

[0057] Specifically, two adjacent spoiler sections 41 are connected in a bent and staggered manner, and a side guide port 42 is formed at the connection, that is, the coolant flows from one spoiler section 41 to the other spoiler section 41 through the side guide port 42, and a spoiler surface 43 is formed at the upstream outlet end. The spoiler surface 43 is used to guide the flow direction of the coolant, that is, to disturb the coolant and change the flow path so that the coolant can flow along a predetermined path.

[0058] In practice, when the coolant flows in the upstream spoiler section 41, its flow direction will be changed under the action of the spoiler surface 43, and it will flow along the side guide port 42 to the downstream spoiler section 41, so that the coolant can flow smoothly between the various spoiler sections 41, avoiding the occurrence of flow dead zones, which can greatly improve the flow state of the coolant and enhance the cooling effect. The bending connection between two adjacent spoiler sections 41 also increases the contact area between the coolant and the inner wall of the spoiler section 41, thereby improving the heat exchange efficiency and further enhancing the cooling effect.

[0059] In some embodiments, the angle between the spoiler surface 43 and the extension direction of the spoiler segment 41 is greater than 45°.

[0060] That is to say, the extension directions of the spoiler surface 43 and the spoiler section 41 are different, and a certain angle is formed between the two, and the angle between the extension directions of the spoiler surface 43 and the spoiler section 41 is greater than 45°. For example, it can be set to 50°, 60°, 75°, 90°, 105°, etc. A larger angle can improve the spoiler effect on the coolant, that is, the flow direction of the coolant changes sharply when flowing through the spoiler surface 43, and more rapid collisions and deflections may occur, flowing to the downstream spoiler section 41, thereby helping to improve the heat exchange efficiency, effectively transferring the heat of the stator winding 102 to the coolant, and improving the cooling effect.

[0061] It should be noted that the larger the angle design, the greater the manufacturing difficulty will be, and the design can be flexibly based on actual needs.

[0062] In some embodiments, the spoiler surface 43 is perpendicular to the extending direction of the spoiler segment 41 .

[0063] That is, the angle between the extension direction of the spoiler surface 43 and the spoiler section 41 is 90°. In this way, when the coolant in the upstream spoiler section 41 flows to the outlet end, the direction will change by nearly 90° under the action of the spoiler surface 43, which is more conducive to the collision and mixing between the coolants. The overall flow resistance of the coolant is smaller, so that the coolant can flow more smoothly to the downstream, accelerate the heat transfer, and more effectively transfer the heat of the stator winding 102 to the coolant, further improving the cooling effect.

[0064] In some embodiments, the extension directions of two adjacent spoiler segments 41 are parallel, and the opening direction of the side guide port 42 is perpendicular to the extension direction of the spoiler segment 41 .

[0065] like Figure 1 and Figure 3 As shown, the spoiler segment 41 extends along the axial direction of the stator yoke 1, and the extension directions of two adjacent spoiler segments 41 are parallel, that is, the flow direction of the coolant in each spoiler segment 41 is the same, wherein, as Figure 2 and Figure 4 As shown, the opening direction of the side guide port 42 is perpendicular to the extension direction of the spoiler section 41, that is, when the upstream coolant flows along the extension direction of the spoiler section 41 to the outlet end, the coolant turns vertically through the side guide port 42 to smoothly flow into the downstream spoiler section 41, and continues to flow in the downstream spoiler section 41 along its extension direction, circulating to realize the cooling process. In this way, the flow resistance can be reduced, the flow efficiency can be improved, thereby improving the heat exchange efficiency, and the structure is compact, which is convenient for manufacturing.

[0066] In some embodiments, the outlet end of one spoiler section 41 located upstream and at least a portion of the inlet end of one spoiler section 41 located downstream face each other in the opening direction of the side guide port 42 .

[0067] Specifically, Figure 2 and Figure 4 As shown, the opening direction of the side guide port 42 is the up-and-down direction shown in the figure, and the spoiler section 41 extends in the left-and-right direction shown in the figure. For example, when the coolant flows from the left end to the right end of the cooling channel 4, the outlet end of a spoiler section 41 located upstream, i.e., the right end in the figure, is directly opposite to the inlet end of a spoiler section 41 located downstream, i.e., at least part of the left end in the figure, in the opening direction of the side guide port 42. As a result, the coolant can flow more directly and smoothly into the downstream spoiler section 41 when passing through the side guide port 42, thereby improving the cooling efficiency, allowing the coolant to pass through the cooling channel 4 more quickly, effectively taking away heat, and improving the heat exchange efficiency. When the coolant flows out from the upstream spoiler section 41 and directly hits the inlet end of the downstream spoiler section 41, it will be in more complete contact with the structure in the downstream spoiler section 41, thereby further increasing the heat exchange area and the heat exchange efficiency.

[0068] In some embodiments, multiple spoiler segments 41 are distributed in groups and form multiple spoiler groups 44 connected along the axial direction of the stator yoke 1, each spoiler group 44 includes: a first spoiler segment 441; a second spoiler segment 442 and / or a third spoiler segment 443, the second spoiler segment 442 is connected to the first spoiler segment 441, and the second spoiler segment 442 is located on one side of the extension direction of the first spoiler segment 441, and the third spoiler segment 443 is connected to the first spoiler segment 441, and the third spoiler segment 443 is located on the other side of the extension direction of the first spoiler segment 441.

[0069] Specifically, a plurality of spoiler segments 41 are distributed in groups to form a plurality of spoiler groups 44 connected along the axial direction of the stator yoke 1, so that the coolant can flow smoothly along the axial direction of the stator yoke 1, flowing from one spoiler group 44 to another spoiler group 44, thereby realizing continuous flow of the coolant in the entire cooling channel 4, and the spoiler segments 41 distributed in groups can improve the spoiler effect, making the structure compact and flexible. According to actual cooling requirements and space size, spoiler segments 41 of different numbers and structures can be flexibly selected to form a spoiler group 44, and their relative positions can be adjusted to achieve the best cooling effect.

[0070] For example, each spoiler group 44 may include a first spoiler segment 441 and a second spoiler segment 442, or each spoiler group 44 includes a first spoiler segment 441, a second spoiler segment 442 and a third spoiler segment 443, or each spoiler group 44 includes a first spoiler segment 441 and a third spoiler segment 443. The shapes and sizes of the first spoiler segment 441, the second spoiler segment 442 and the third spoiler segment 443 may be set to be the same or different, and may be flexibly designed according to actual needs.

[0071] Among them, the first spoiler segment 441 is connected to the second spoiler segment 442, and the second spoiler segment 442 is located on one side of the extension direction of the first spoiler segment 441, that is, the first spoiler segment 441 is adjacent to the second spoiler segment 442, and the second spoiler segment 442 can be located on the side where the coolant in the first spoiler segment 441 flows out, or on the side where the coolant in the first spoiler segment 441 flows in. In this way, the coolant in the first spoiler segment 441 can flow smoothly to the second spoiler segment 442, or flow from the second spoiler segment 442 to the first spoiler segment 441.

[0072] The first spoiler segment 441 is connected to the third spoiler segment 443, and the third spoiler segment 443 is located on the other side of the extension direction of the first spoiler segment 441, that is, the third spoiler segment 443 is not adjacent to the second spoiler segment 442, the second spoiler segment 442 and the third spoiler segment 443 are respectively located on different sides of the first spoiler segment 441, and the first spoiler segment 441 is adjacent to the third spoiler segment 443. The third spoiler segment 443 can be located on the side where the coolant in the first spoiler segment 441 flows out, or on the side where the coolant in the first spoiler segment 441 flows in. In this way, the coolant in the first spoiler segment 441 can flow smoothly into the third spoiler segment 443, or flow from the third spoiler segment 443 to the first spoiler segment 441.

[0073] Thus, the coolant can flow smoothly between the first spoiler segment 441 , the second spoiler segment 442 and the third spoiler segment 443 , and flow from one spoiler group 44 to another spoiler group 44 , thereby realizing continuous circulation of the coolant.

[0074] In some embodiments, each spoiler group 44 includes a first spoiler segment 441 and two second spoiler segments 442 , and the two second spoiler segments 442 are respectively connected to two ends of a first spoiler segment 441 .

[0075] Specifically, Figure 2 As shown, the first spoiler segment 441 can be located on the central axis of the stator tooth slot 3, and the second spoiler segment 442 is staggered and distributed in parallel with the first spoiler segment 441, that is, the second spoiler segment 442 can be relatively located at the upper or lower position of the stator tooth slot 3, and each spoiler group 44 includes a first spoiler segment 441 and two second spoiler segments 442, and the two second spoiler segments 442 are respectively connected to the two ends of a first spoiler segment 441, that is, the two second spoiler segments 442 are respectively located at the outlet end or the inlet end of the first spoiler segment 441, and are connected to the outlet end or the inlet end of the first spoiler segment 441, so as to form a flow channel structure shaped like a "bow".

[0076] Therefore, when the coolant first enters the first second spoiler segment 442, it flows along the extension direction of the second spoiler segment 442, flows into the first spoiler segment 441, continues to flow along the direction of the first spoiler segment 441, flows into the second second spoiler segment 442, continues to flow along the extension direction of the second second spoiler segment 442, and circulates between each spoiler group 44 in turn, taking away the heat generated by the stator winding 102.

[0077] In actual design, the spoiler group 44 of this embodiment can be designed as a cooling channel 4 symmetrical along the axial ends of the stator yoke 1 to keep the axial ends of the stator core 101 symmetrical.

[0078] In other embodiments, each spoiler group 44 includes a first spoiler segment 441 , a second spoiler segment 442 and a third spoiler segment 443 , and a second spoiler segment 442 and a third spoiler segment 443 are respectively connected to two ends of a first spoiler segment 441 .

[0079] That is, the second spoiler segment 442 and the third spoiler segment 443 are respectively located at the outlet end or the inlet end of the first spoiler segment 441, and the second spoiler segment 442 and the third spoiler segment 443 can be set to be the same or different, and are connected to the outlet end or the inlet end of the first spoiler segment 441, wherein the second spoiler segment 442 and the third spoiler segment 443 can be staggered and distributed in a parallel shape relative to the first spoiler segment 441, that is, the second spoiler segment 442 and the third spoiler segment 443 are distributed one above and one below relative to the first spoiler segment 441, or are distributed on the same horizontal line, that is, the second spoiler segment 442 and the third spoiler segment 443 are distributed above or below relative to the first spoiler segment 441.

[0080] Therefore, when the coolant enters the second spoiler segment 442 or the third spoiler segment 443, it can flow along the extension direction of the second spoiler segment 442 or the third spoiler segment 443, flow into the first spoiler segment 441, continue to flow along the direction of the first spoiler segment 441, flow into the third spoiler segment 443 or the second spoiler segment 442, continue to flow along the extension direction of the third spoiler segment 443 or the second spoiler segment 442, and circulate between each spoiler group 44 in turn to take away the heat generated by the stator winding 102.

[0081] In some embodiments, the width of the second spoiler segment 442 is the same as the width of the first spoiler segment 441 , and the width of the third spoiler segment 443 is the same as the width of the first spoiler segment 441 .

[0082] That is, the width of the first spoiler segment 441, the width of the second spoiler segment 442 and the width of the third spoiler segment 443 can be set to be the same. In this way, the coolant can flow evenly among the first spoiler segment 441, the second spoiler segment 442 and the third spoiler segment 443, avoiding local flow unevenness affecting the flow efficiency and heat exchange efficiency. Moreover, all the spoiler segments 41 have the same width, which can maintain the balance and symmetry of the stator core 101, facilitate processing and manufacturing, and reduce costs.

[0083] In some other embodiments, the extension length of the second spoiler segment 442 is the same as the extension length of the third spoiler segment 443 .

[0084] That is, the flow path lengths of the coolant in the second spoiler section 442 and the third spoiler section 443 are the same. This is beneficial for the coolant to flow evenly in the spoiler group 44 and improve the heat exchange efficiency. It is also beneficial for the entire spoiler group 44 to present a more symmetrical structure in the axial direction of the stator core 101, thereby reducing the flow unevenness problem caused by structural asymmetry.

[0085] In some embodiments, multiple spoiler segments 41 are distributed in groups to form multiple spoiler groups 44 connected along the axial direction of the stator yoke 1, and each spoiler group 44 includes: a main spoiler segment 444; two side spoiler segments 445, the two side spoiler segments 445 are distributed apart and respectively connected to the main spoiler segment 444, and the two side spoiler segments 445 are respectively located on both sides of the extension direction of the main spoiler segment 444.

[0086] Specifically, a plurality of spoiler segments 41 are distributed in groups to form a plurality of spoiler groups 44 connected along the axial direction of the stator yoke 1, so that the coolant can flow smoothly along the axial direction of the stator yoke 1, flowing from one spoiler group 44 to another spoiler group 44, thereby realizing continuous flow of the coolant in the entire cooling channel 4, and the spoiler segments 41 distributed in groups can improve the spoiler effect, making the structure compact and flexible. According to actual cooling requirements and space size, spoiler segments 41 of different numbers and structures can be flexibly selected to form a spoiler group 44, and their relative positions can be adjusted to achieve the best cooling effect.

[0087] For example, Figure 4 As shown, each spoiler group 44 may include a main spoiler segment 444 and two side spoiler segments 445. The two side spoiler segments 445 are distributed at one end of the main spoiler segment 444 at a certain distance, and are respectively connected to the main spoiler segment 444, and are located on both sides of the extension direction of the main spoiler segment 444, that is, the two side spoiler segments 445 are at one end of the extension direction of the main spoiler segment 444, and are relatively distributed on the upper and lower sides of the main spoiler segment 444 along the up and down directions shown in the figure, and are respectively connected to the outlet ends of the main spoiler segment 444, so that the coolant can flow smoothly between the main spoiler segment 444 and the two side spoiler segments 445.

[0088] In practice, when the coolant flows out from the main spoiler section 444, it can be diverted to the two side spoiler sections 445. After flowing along the two side spoiler sections 445, it can be reunited at the inlet end of the main spoiler section 444 of the next spoiler group 44 and flow into the main spoiler section 444, and circulate in sequence. In this way, the two side spoiler sections 445 can disturb the coolant at the same time, which greatly increases the effect of fluid disturbance, thereby improving the cooling effect, and the coolant can flow into the two side spoiler sections 445 at the same time, which can increase the flow rate of the coolant, increase the heat exchange area, and thus improve the heat exchange efficiency.

[0089] In some embodiments, the two side spoiler segments 445 are symmetrically distributed on both sides of the extension direction of the main spoiler segment 444 .

[0090] Specifically, Figure 3 and Figure 4As shown, the main spoiler section 444 can be located on the central axis of the stator tooth slot 3, and the two side spoiler sections 445 are symmetrically distributed on the upper and lower sides of the extension direction of the main spoiler section 444, that is, the flow paths of the coolant in the two side spoiler sections 445 are the same. In this way, the coolant can flow evenly between the spoiler groups 44, which can improve the heat exchange efficiency and make the entire cooling channel 4 a symmetrical structure, thereby reducing the flow unevenness problem caused by structural asymmetry, and is easy to manufacture and flexible and convenient.

[0091] In some embodiments, the sum of the widths of the two side spoiler segments 445 is greater than or equal to the width of the main spoiler segment 444 .

[0092] Specifically, the width of a side spoiler section 445 can be set to be the same as or different from the width of the main spoiler section 444. Figure 4 As shown, the width of the two side spoiler segments 445 is the same as the width of the main spoiler segment 444, and the sum of the widths of the two side spoiler segments 445 is greater than or equal to the width of the main spoiler segment 444. In this way, the contact area between the two side spoiler segments 445 and the coolant can be increased, and more coolant can flow into the two side spoiler segments 445 for heat exchange, thereby improving the heat exchange efficiency.

[0093] Furthermore, the two wider side spoiler sections 445 can more effectively guide the coolant in the main spoiler section 444 to flow into the two side spoiler sections 445, thereby reducing flow resistance, preventing the occurrence of flow dead zones, and making the coolant distribution more uniform.

[0094] In some embodiments, the stator yoke 1 is further provided with an inlet and an outlet; one end of the cooling channel 4 is connected to the inlet and the other end is connected to the outlet.

[0095] Specifically, the inlet can be set at one axial end of the stator yoke 1, and the outlet can be set at the other axial end of the stator yoke 1. One end of the cooling channel 4 is connected to the inlet and the other end is connected to the outlet. In this way, the coolant can flow into the cooling channel 4 through the inlet, and circulate in the cooling channel 4 for cooling, and then flow out through the outlet to enter the next cooling cycle, thereby realizing an effective cooling process for the stator winding 102 and the stator core 101.

[0096] In other embodiments, there are two outlets, the middle of the cooling channel 4 is connected to the inlet, and both ends of the cooling channel 4 are respectively connected to an outlet.

[0097] Specifically, the inlet can be set at the middle position of the stator yoke 1 to communicate with the middle of the cooling channel 4, and the two outlets are set at the axial ends of the stator yoke 1 to communicate with the two ends of the cooling channel 4 respectively. In this way, the coolant can flow into the cooling channel 4 through the inlet, and be divided to both sides in the middle of the cooling channel 4. Both sides of the cooling channel 4 can absorb heat at the same time, thereby improving the heat absorption efficiency, so that the stator winding 102 and the stator core 101 can be cooled more quickly, improving the cooling effect, and the coolant after absorbing heat can be discharged through the outlet connected at both ends of the cooling channel 4 to enter the next cooling cycle.

[0098] The present invention also provides a motor stator 100 .

[0099] The motor stator 100 according to the embodiment of the present invention comprises a stator winding 102 and a stator core 101 of any one of the above embodiments, and the stator winding 102 is arranged in the stator tooth slot 3 .

[0100] In the stator core 101, a cooling channel 4 open to the stator tooth slot 3 is provided on the inner circumferential wall of the stator yoke 1, so that when the coolant flows in the cooling channel 4, the stator winding 102 and the stator core 101 can be quickly cooled and cooled. By providing a cooling channel 4 including a plurality of spoiler segments 41 distributed in sequence along the axial direction of the stator yoke 1, and at least parts of at least two spoiler segments 41 are staggered in the axial direction of the stator yoke 1, the coolant in the cooling channel 4 is disturbed, the fluid disturbance effect is enhanced, the coolant can be mixed and exchanged more strongly, the heat exchange efficiency is improved, and the formation of a channel dead zone is avoided, thereby greatly improving the cooling effect.

[0101] According to the motor stator 100 of the embodiment of the present invention, by setting the stator core 101 of the above embodiment, the stator winding 102 is installed in the stator tooth slot 3, which can greatly improve the cooling effect of the stator winding 102 and the stator core 101, and significantly reduce the temperature of the stator winding 102 and the stator core 101, thereby preventing the motor stator 100 from overheating and damage, improving the performance of the motor stator 100, and extending the service life of the motor stator 100.

[0102] The invention also provides a motor.

[0103] The motor according to the embodiment of the present invention is provided with the motor stator 100 of the above embodiment, which can make the motor run reliably and stably, improve the overall performance of the motor, and thus improve the operating efficiency of the motor.

[0104] The present invention also provides a vehicle.

[0105] A vehicle according to an embodiment of the present invention is provided with the motor of the above embodiment.

[0106] According to the vehicle of this embodiment, by using the motor of the above embodiment, the driving efficiency of the vehicle can be improved and the energy consumption of the vehicle can be reduced, thereby greatly improving the driving experience and improving the user comfort.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 invention. 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 any one or more embodiments or examples in a suitable manner.

[0108] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator core, characterized in that: include: stator yoke; stator teeth, the stator teeth are multiple, the multiple stator teeth are arranged on the inner circumferential wall of the stator yoke and are spaced apart and distributed along the circumferential direction of the stator yoke, and two adjacent stator teeth and the inner circumferential wall of the stator yoke jointly define a stator tooth slot for accommodating a stator winding; Among them, the inner circumferential wall of the stator yoke is formed with a cooling channel open toward the stator tooth slots, and the cooling channel includes a plurality of spoiler segments distributed in sequence along the axial direction of the stator yoke, and at least parts of at least two of the spoiler segments are staggered in the axial direction of the stator yoke.

2. The stator core according to claim 1, characterized in that: A side guide port is formed at the connection between two adjacent spoiler sections, a spoiler surface is formed at the outlet end of one of the spoiler sections located upstream, and the coolant in one of the spoiler sections located upstream is suitable for flowing through the side guide port into one of the spoiler sections located downstream under the guidance of the spoiler surface.

3. The stator core according to claim 2, characterized in that: The angle between the spoiler surface and the extension direction of the spoiler section is greater than 45°.

4. The stator core according to claim 2, characterized in that: The spoiler surface is perpendicular to an extending direction of the spoiler section.

5. The stator core according to claim 2, characterized in that: The extension directions of two adjacent spoiler sections are parallel, and the opening direction of the side guide port is perpendicular to the extension direction of the spoiler section.

6. The stator core according to claim 2, characterized in that: The outlet end of one of the spoiler sections located upstream and at least a portion of the inlet end of one of the spoiler sections located downstream face each other in the opening direction of the side guide port.

7. The stator core according to any one of claims 1 to 6, characterized in that: The plurality of spoiler segments are distributed in groups to form a plurality of spoiler groups connected along the axial direction of the stator yoke, and each spoiler group includes: The first spoiler section; A second spoiler segment and / or a third spoiler segment, wherein the second spoiler segment is connected to the first spoiler segment and is located on one side of the extension direction of the first spoiler segment, and the third spoiler segment is connected to the first spoiler segment and is located on the other side of the extension direction of the first spoiler segment.

8. The stator core according to claim 7, characterized in that: Each of the spoiler groups includes one first spoiler segment and two second spoiler segments, and the two second spoiler segments are respectively connected to two ends of one first spoiler segment; And / or, each of the spoiler groups includes one of the first spoiler segments, one of the second spoiler segments and one of the third spoiler segments, and one of the second spoiler segments and one of the third spoiler segments are respectively connected to two ends of one of the first spoiler segments.

9. The stator core according to claim 7, characterized in that: The width of the second spoiler segment is the same as that of the first spoiler segment, and the width of the third spoiler segment is the same as that of the first spoiler segment; And / or, the extension length of the second spoiler segment is the same as the extension length of the third spoiler segment.

10. The stator core according to any one of claims 1 to 6, characterized in that: The plurality of spoiler segments are distributed in groups to form a plurality of spoiler groups connected along the axial direction of the stator yoke, and each spoiler group includes: Main spoiler section; Two side spoiler sections are spaced apart and respectively communicated with the main spoiler section, and the two side spoiler sections are respectively located on both sides of the extension direction of the main spoiler section.

11. The stator core according to claim 10, characterized in that: The two side spoiler sections are symmetrically distributed on both sides of the extension direction of the main spoiler section.

12. The stator core according to claim 10, characterized in that: The sum of the widths of the two side spoiler sections is greater than or equal to the width of the main spoiler section.

13. The stator core according to any one of claims 1 to 6, characterized in that: The stator yoke is also provided with an inlet and an outlet; One end of the cooling channel is connected to the inlet and the other end is connected to the outlet; Alternatively, there are two outlets, the middle portion of the cooling channel is connected to the inlet, and both ends of the cooling channel are respectively connected to one outlet.

14. A motor stator, characterized in that: It comprises a stator winding and a stator core according to any one of claims 1 to 13, wherein the stator winding is arranged in the stator tooth slot.

15. A motor, characterized in that: A motor stator as claimed in claim 14 is provided.

16. A vehicle, characterized in that: An electric motor as claimed in claim 15 is provided.

Images