Motor stator and cooling assembly installation method

Abstract

The invention discloses a motor stator and a method for installing a cooling assembly, and relates to the technical field of automobile motors, wherein the motor stator comprises an iron core, a stator winding and at least one cooling assembly; the iron core is arranged in an annular shape, and a plurality of winding slots are penetrated on the end surface distributed along the axial direction of the iron core, and the plurality of winding slots are arranged at intervals along the circumference of the iron core; the stator winding comprises a plurality of winding wires passing through the winding slots, and the plurality of winding wires in the winding slots are arranged along the radial direction of the iron core; the cooling assembly comprises a plurality of cooling pipes, and the plurality of cooling pipes extend along the axial direction of the iron core for circulating cooling liquid, and the plurality of cooling pipes are penetrated in at least part of the winding slots and fit with the corresponding winding wires; the technical solution provided by the invention reduces the iron loss of the iron core and the copper loss of the winding, improves the heat dissipation capacity of the motor system, enables the motor to operate at a suitable temperature, and thus improves the working efficiency and service life of the motor.

Description

Technical Field

[0001] The invention relates to the technical field of automobile motors, and in particular to a method for installing a motor stator and a cooling assembly. Background Art

[0002] The motor generates a lot of heat when running. This heat is mainly the iron loss of the motor's stator and rotor core and the copper loss of the stator winding. Higher losses mean higher heat generation. Among them, the copper loss of the motor accounts for between 40% and 70% of the total loss. The ambient temperature has a great influence on the copper loss. Heat dissipation of the motor's copper wire can greatly reduce the copper loss.

[0003] At present, the cooling method of most motors is to form a cavity by interference fitting the motor housing and the stator core, so that the water coolant circulates around the outer wall of the stator and the inner wall of the housing, and dissipates heat through structural heat conduction. This method first reduces the temperature of the stator core and then reduces the winding temperature through heat conduction. The cooling structure has a long distance and cannot directly dissipate heat for the stator winding, which is not conducive to rapid cooling of the motor winding.

[0004] Therefore, how to improve the heat dissipation efficiency of motor windings has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The main purpose of the present invention is to provide a method for installing a motor stator and a cooling assembly, aiming to improve the heat dissipation efficiency of the motor winding.

[0006] To achieve the above-mentioned purpose, the motor stator proposed in the present invention includes an iron core, a stator winding and at least one cooling assembly; the iron core is arranged in a ring shape, and a plurality of winding slots are penetrated on the end surface distributed along the axial direction of the iron core, and the plurality of winding slots are arranged at intervals along the circumference of the iron core; the stator winding includes a plurality of winding wires passing through each winding slot, and the plurality of winding wires in each winding slot are arranged along the radial direction of the iron core; the cooling assembly includes a plurality of cooling pipes, and the plurality of cooling pipes extend along the axial direction of the iron core for circulating cooling liquid, and the plurality of cooling pipes are penetrated in at least part of the winding slots and fit with the corresponding winding wires.

[0007] In one embodiment, the cooling assembly further includes an arc-shaped extension tube, and among the three adjacent cooling tubes, both ends of the cooling tube located in the middle are connected to the two cooling tubes on both sides through two extension tubes respectively, and the bending directions of the two adjacent extension tubes are arranged oppositely.

[0008] In one embodiment, the diameter of one of the extension tube and the cooling tube varies along its length direction to form a step surface facing the other one, and the step surface abuts against the other one.

[0009] In one embodiment, one of the extension tube and the cooling tube is inserted into the other; wherein the extension tube and the cooling tube are interference fit, and / or glue is provided between the extension tube and the cooling tube.

[0010] In one embodiment, a liquid outlet hole facing the iron core is formed on the wall of the extension tube to spray the cooling liquid toward the iron core.

[0011] In one embodiment, a plurality of cooling assemblies are provided, the plurality of cooling assemblies are distributed along the circumference of the core, and a plurality of cooling pipes in the plurality of cooling assemblies are passed through a plurality of winding slots.

[0012] In one embodiment, multiple cooling pipes in the cooling assembly are inserted into multiple winding slots; the cooling assembly is provided with multiple cooling pipes, and in the multiple cooling pipes, the cooling pipes located in the same winding slot are arranged along the radial direction of the iron core and are alternately arranged with the multiple winding wires.

[0013] In one embodiment, a plurality of cooling components are provided, and the motor stator also includes an inlet and outlet water component, the inlet and outlet water component includes a plurality of liquid inlet pipes and a plurality of liquid outlet pipes respectively connected to the plurality of cooling components, wherein: the inlet and outlet water component also includes a liquid inlet joint, the liquid inlet joint has a plurality of first interfaces, one of the plurality of first interfaces is used to receive coolant, and the remaining plurality of first interfaces are respectively connected to the other end of the plurality of liquid inlet pipes; and / or, the inlet and outlet water component also includes a liquid outlet joint, the liquid outlet joint has a plurality of second interfaces, one of the plurality of interfaces is used to discharge coolant, and the remaining plurality of second interfaces are respectively connected to the other end of the plurality of liquid outlet pipes.

[0014] The present invention also proposes a method for installing a cooling assembly, which is used to install the above-mentioned cooling assembly. The cooling assembly also includes an arc-shaped extension tube. Among the three adjacent cooling tubes, the two ends of the cooling tube located in the middle are respectively connected to the two cooling tubes on both sides through two extension tubes, and the bending directions of the two adjacent extension tubes are relatively arranged. The installation method of the cooling assembly includes the following steps: using an extension tube to combine every two adjacent cooling tubes into one to obtain a plurality of tube groups, wherein the extension tubes in each tube group are at the same end of the two cooling tubes; inserting the plurality of cooling tubes in the plurality of tube groups into the plurality of winding slots of the iron core; using an extension tube to combine two adjacent cooling tubes in two adjacent tube groups into one.

[0015] In one embodiment, the step of combining every two adjacent cooling tubes into one using an extension tube includes: arranging multiple cooling tubes side by side, exposing one end of the extension tube, and installing the extension tube at one end of the multiple cooling tubes; and / or, the step of inserting multiple cooling tubes in multiple tube groups into multiple winding slots of the iron core includes: installing the multiple cooling tubes in the same direction; and / or, the step of combining two adjacent cooling tubes in two adjacent tube groups into one using an extension tube includes: fixing the tube group, exposing one end of the cooling tube away from the extension tube, and installing the remaining extension tubes.

[0016] The technical solution of the present invention adopts a cooling pipe that fits the winding wire and is passed through the winding slot to allow the coolant to flow in the stator winding, so as to directly cool the stator winding, directly cool the winding wire in the center of the stator winding, quickly reduce the temperature of the stator winding in the iron core and the winding slot, reduce the iron loss of the iron core and the copper loss of the winding, improve the heat dissipation capacity of the motor system, enable the motor to operate at a suitable temperature, and thus improve the working efficiency and service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A schematic structural diagram of an embodiment of a motor stator provided by the present invention;

[0019] Figure 2 for Figure 1 A schematic top view of the motor stator;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the cooling assembly in FIG.

[0021] Figure 4 for Figure 3 Schematic diagram of the structure of the middle cooling pipe and the extension pipe;

[0022] Figure 5 A schematic structural diagram of a cooling assembly of another embodiment of a motor stator provided by the present invention;

[0023] Figure 6 for Figure 5 Schematic diagram of the liquid inlet joint structure of the middle cooling component;

[0024] Figure 7 A schematic diagram of the temperature rise simulation results of a motor according to an embodiment of the present invention;

[0025] Figure 8 It is a schematic diagram of the temperature rise simulation results of the comparative example;

[0026] Fig. 9 A diagram showing the motor efficiency simulation results of a motor according to an embodiment of the present invention;

[0027] Fig.10 The motor efficiency simulation result diagram for the comparative example;

[0028] Fig.11 A schematic flow chart of an embodiment of a method for installing a cooling assembly provided by the present invention.

[0029] Description of Figure Numbers:

[0030] 100. Motor stator; 1. Iron core; 2. Stator winding; 21. Winding wire; 3. Cooling assembly; 31. Cooling pipe; 32. Extension pipe; 33. Liquid outlet; 4. Water inlet and outlet assembly; 41. Liquid inlet pipe; 42. Liquid outlet pipe; 43. Liquid inlet connector; 44. Liquid outlet connector.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] The motor generates a lot of heat when it is running. This heat is mainly the iron loss of the motor's stator and rotor core and the copper loss of the stator winding. Higher losses mean higher heat generation. Among them, the copper loss of the motor accounts for between 40% and 70% of the total loss. The ambient temperature has a great influence on the copper loss. Heat dissipation of the motor copper wire can greatly reduce the copper loss. At present, most motors are water-cooled motors. The cooling method is to form a cavity after the motor housing and the stator core are interference-fitted, so that the water coolant circulates around the outer wall of the stator and the inner wall of the casing, and the heat is dissipated through structural heat conduction. This method cannot directly dissipate the heat of the stator winding. It first reduces the temperature of the stator core, and then the core reduces the winding temperature through heat conduction. The cooling structure distance is a bit long, which is not conducive to the rapid cooling of the motor winding.

[0036] With the rapid development of motor cooling technology, oil-cooled motors are gradually being widely used in the market. Some designs spray cooling oil directly onto the ends and inside of the windings. This direct contact is cooling, which can quickly cool the windings. However, the iron core and windings inside the stator core slots are not covered by cooling. Usually, the heat inside the stator slots is the most difficult to release, and it is also the location with the most serious heat. Rapidly cooling the iron core and windings in the stator slots can greatly improve the output performance and overall efficiency of the motor, and can also increase the service life of the motor.

[0037] Based on this, the present invention proposes a motor stator 100 to improve the heat dissipation efficiency of the winding copper wire. Figure 1 and Figure 2 In one embodiment of the present invention, the motor stator 100 includes an iron core 1, a stator winding 2 and at least one cooling assembly 3; the iron core 1 is arranged in an annular shape, and a plurality of winding slots are penetrated on the end surface distributed along the axial direction of the iron core 1, and the plurality of winding slots are arranged at intervals along the circumference of the iron core 1; the stator winding 2 includes a plurality of winding wires 21 passing through each winding slot, and the plurality of winding wires 21 in each winding slot are arranged along the radial direction of the iron core 1; the cooling assembly 3 includes a plurality of cooling pipes 31, and the plurality of cooling pipes 31 extend along the axial direction of the iron core 1 for circulating cooling liquid, and the plurality of cooling pipes 31 are penetrated in at least part of the winding slots and fit with the corresponding winding wires 21.

[0038] The technical solution of the present invention adopts a cooling pipe 31 that is inserted into the winding slot and fits the winding wire 21 to allow the coolant to flow in the stator winding 2, so as to directly cool the stator winding 2, directly cool the winding wire 21 at the center of the stator winding 2, quickly reduce the temperature of the stator winding 2 in the iron core 1 and the winding slot, reduce the low iron loss of the iron core 1 and the copper loss of the stator winding 2, improve the heat dissipation capacity of the motor system, and enable the motor to operate at a suitable temperature, thereby improving the working efficiency and service life of the motor.

[0039] Among them, the number of cooling tubes 31 in the winding slots is not limited: in one embodiment, no cooling tube 31 is inserted in some winding slots, and multiple cooling tubes 31 are inserted in other winding slots; in another embodiment, each winding slot is inserted with a cooling tube 31; in another embodiment, each winding slot is inserted with multiple cooling tubes 31, and all cooling tubes 31 are arranged to form a cooling system, and the cooling system is concentrically annular or spiral along the cross section perpendicular to the axial direction of the core 1. The cross-section of the cooling tube 31 and the winding wire 21 can be rectangular, circular or other shapes, and can be matched with each other: in one embodiment, the cross-section of the winding wire 21 and the cooling tube 31 are both rectangular; in another embodiment, the cross-section of the winding wire 21 is set in a "D" shape, and the arc surfaces of two adjacent winding wires 21 are arranged oppositely, and a matching cooling tube 31 is arranged in the middle. The coolant can be water, cooling oil or ethylene glycol water coolant, preferably ethylene glycol water coolant with a volume percentage of 50%.

[0040] In one embodiment of the present invention, the cooling assembly 3 further includes an arc-shaped extension tube 32. Among the three adjacent cooling tubes 31, the two ends of the cooling tube 31 located in the middle are respectively connected to the two cooling tubes 31 on both sides through two extension tubes 32, and the bending directions of the two adjacent extension tubes 32 are arranged oppositely. In this arrangement, the coolant flows through the multiple cooling tubes 31 in the cooling assembly 3 in sequence to cool the winding wire 21 in each winding slot, so as to reduce the risk of leakage of the coolant.

[0041] See also Figure 4 In one embodiment of the present invention, the diameter of one of the extension tube 32 and the cooling tube 31 along its length direction is changed to form a step surface facing the other, and the step surface abuts against the other. Such a setting is used for limited assembly and a tortuous contact surface is formed, which enhances the sealing performance between the extension tube 32 and the cooling tube 31 to prevent the coolant from leaking into the air gap of the motor and causing oil stirring loss.

[0042] Among them, the direction of the tube diameter change is not limited, and a step surface facing another one can be formed. In one embodiment, the outer diameter of the extension tube 32 gradually decreases toward the direction close to the cooling tube 31 to form the step surface; in another embodiment, the inner diameter of the extension tube 32 gradually increases toward the direction close to the cooling tube 31 to form the step surface.

[0043] In one embodiment of the present invention, one of the extension tube 32 and the cooling tube 31 is inserted into the other, wherein the extension tube 32 and the cooling tube 31 are interference fit. In this way, the sealing performance between the extension tube 32 and the cooling tube 31 is enhanced to prevent the coolant from leaking into the air gap of the motor and causing oil churning loss.

[0044] Specifically, the outer diameter of the extension tube 32 is gradually reduced toward the cooling tube 31 to form a main section and a connecting section close to the cooling tube 31 . The outer diameter of the connecting section is smaller than the inner diameter of the cooling tube 31 so as to be inserted into the cooling tube 31 .

[0045] Furthermore, the interference between the cooling tube 31 and the connecting section is 0.04-0.06 mm, and the length of the connecting section is 2 mm.

[0046] In one embodiment of the present invention, glue is provided between the extension tube 32 and the cooling tube 31. The glue is preferably an acrylic adhesive glue, which has good heat resistance, a temperature resistance level of 120°C, and is compatible with oil or ethylene glycol water coolant. The glue coating thickness is 1-2um; and the bonding strength is not less than 2MPa.

[0047] In one embodiment of the present invention, a liquid outlet 33 is formed on the wall of the extension tube 32 and faces the inside of the iron core 1, so as to spray the cooling liquid toward the iron core 1. In this way, the cooling liquid can be directly sprayed toward the winding end.

[0048] See also Figure 5 In one embodiment of the present invention, a plurality of cooling assemblies 3 are provided, and the plurality of cooling assemblies 3 are distributed along the circumference of the core 1, and the plurality of cooling pipes 31 in the plurality of cooling assemblies 3 are penetrated in the plurality of winding slots. In this way, the cooling pipes 31 are penetrated in all the winding slots and are divided into two cooling assemblies 3, which maintains a good cooling effect while reducing the difficulty of installation, thereby increasing the life of the cooling pipes 31.

[0049] In one embodiment of the present invention, a plurality of cooling tubes 31 in the cooling assembly 3 are inserted into a plurality of winding slots; a plurality of cooling assemblies 3 are provided, and in the plurality of cooling assemblies 3, the cooling tubes 31 in the same winding slot are arranged along the radial direction of the iron core 1 and are arranged alternately with the plurality of winding wires 21. In this way, the plurality of cooling tubes 31 in one winding slot cool the plurality of winding wires 21 together, thereby improving the cooling effect.

[0050] See also Figure 3 In one embodiment of the present invention, a plurality of cooling components 3 are provided, and the motor stator 100 further includes an inlet and outlet water component 4, and the inlet and outlet water component 4 includes a plurality of liquid inlet pipes 41 and a plurality of liquid outlet pipes 42 respectively connected to the plurality of cooling components 3. For a motor system with a high pressure drop restriction requirement, a multi-inlet and multi-outlet combination mode is adopted to divide the total path of the cooling system into multiple paths, and the pipeline distance of each cooling component 3 is shortened, which effectively reduces the pressure drop of the cooling system, so as to maintain the flow speed of the medium in the cooling pipe 31, so that the coolant can quickly take away the heat, thereby improving the heat dissipation capacity of the motor.

[0051] See also Figure 5 and Figure 6In one embodiment of the present invention, the water inlet and outlet assembly 4 further includes a liquid inlet joint 43, which has a plurality of first interfaces, one of which is used to receive the coolant, and the remaining plurality of first interfaces are respectively connected to the other ends of the plurality of liquid inlet pipes 41. In this way, the liquid inlet pipes 41 of the plurality of cooling assemblies 3 are collected through the liquid inlet joint 43 to uniformly input the coolant, thereby maintaining the uniformity of cooling at various locations of the motor stator 100.

[0052] In one embodiment of the present invention, the water inlet and outlet assembly 4 further includes a liquid outlet joint 44, which has a plurality of second interfaces, one of which is used to discharge the coolant, and the remaining plurality of second interfaces are respectively connected to the other ends of the plurality of liquid outlet pipes 42. In this way, the liquid outlet pipes 42 of the plurality of cooling assemblies 3 are collected through the liquid outlet joint 44 to uniformly discharge the coolant, so as to keep the residence time of the coolant at each location of the motor stator 100 equal, and to maintain the uniformity of the cooling effect.

[0053] The present invention further provides a motor. In an embodiment of the present invention, the motor includes the motor stator 100 and a motor rotor disposed in the middle of the motor stator 100 .

[0054] A motor without the above-mentioned cooling component 3 is used as a comparative example for simulation analysis and comparison. Based on the same stator iron loss and winding copper loss as heat source output conditions, the stator outer wall heat exchange conditions of the embodiment and the comparative example are the same, which is 1000W / m2 and the initial temperature is 65°C.

[0055] See also Figure 7 and Figure 8 , Figure 7 is a schematic diagram of the temperature rise simulation results of the embodiment, Figure 8 It is a schematic diagram of the temperature rise simulation results of the comparative example. It can be seen that the highest temperature of the comparative example is 148.3°C and the lowest temperature is 114.6°C; the highest temperature of the embodiment is 105.48°C; the lowest temperature is 80.504°C; the temperature rise results of the entire stator differ by a maximum of 30°C and an average of 24°C; it can be seen that the motor stator 100 of the present invention has a better effect on motor heat dissipation.

[0056] See also Fig. 9 and Fig.10 , respectively, are the motor efficiency simulation results for comparison based on the above temperature rise results as the initial temperature conditions for motor efficiency simulation.

[0057] From the above motor efficiency comparison, it can be seen that the high-efficiency range of the embodiment accounts for a larger area than the comparison ratio, which means that the motor CLTC efficiency of the motor stator 100 provided by the present invention is higher, which is more conducive to improving the cruising range of the whole vehicle.

[0058] This also shows that the cooling assembly 3 and the motor stator 100 provided by the present invention can increase and improve the heat dissipation capacity of the motor, so that the operating temperature of the motor is lower, and the operating efficiency and service life of the motor are improved.

[0059] See also Fig.11 The present invention also provides a method for installing a cooling assembly, which is used to install the above-mentioned cooling assembly 3, wherein the cooling assembly 3 also includes an arc-shaped extension pipe 32, and among the three adjacent cooling pipes 31, the two ends of the cooling pipe 31 located in the middle are respectively connected to the two cooling pipes 31 on both sides through the two extension pipes 32, and the bending directions of the two adjacent extension pipes 32 are arranged oppositely. The method for installing the cooling assembly 3 includes the following steps S10 to S30:

[0060] Step S10, using an extension tube 32 to combine every two adjacent cooling tubes 31 into one, so as to obtain a plurality of tube groups, wherein the extension tube 32 in each tube group is located at the same end of the two cooling tubes 31;

[0061] Step S20, inserting a plurality of cooling tubes 31 in a plurality of tube groups into a plurality of winding slots of the iron core 1;

[0062] Step S30: using an extension tube 32 to combine two adjacent cooling tubes 31 in two adjacent tube groups into one.

[0063] The technical solution of the present invention reduces the difficulty of installing the cooling assembly 3 on the iron core 1 by installing the cooling pipe 31 and the extension pipe 32 of the cooling assembly 3 twice.

[0064] Specifically, in one embodiment of the present invention, step S10 includes: arranging a plurality of cooling tubes 31 side by side, exposing one end of the extension tube 32 , and installing the extension tube 32 at one end of the plurality of cooling tubes 31 .

[0065] In one embodiment of the present invention, step S20 includes: installing a plurality of cooling pipes 31 along the same direction.

[0066] In one embodiment of the present invention, step S30 includes: fixing the tube group, exposing one end of the cooling tube 31 away from the extension tube 32 , and installing the remaining extension tubes 32 .

[0067] The above are only exemplary embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A motor stator, characterized in that: include: An iron core is arranged in an annular shape, and a plurality of winding slots are arranged on the end surface distributed along the axial direction of the iron core, and the plurality of winding slots are arranged at intervals along the circumference of the iron core; a stator winding, comprising a plurality of winding wires passing through each of the winding slots, wherein the plurality of winding wires in each of the winding slots are arranged along the radial direction of the iron core; and At least one cooling assembly, the cooling assembly comprising a plurality of cooling tubes, the plurality of cooling tubes extending along the axial direction of the core for circulating a coolant, the plurality of cooling tubes passing through at least a portion of the winding slots and being in contact with the corresponding winding wires.

2. The motor stator according to claim 1, characterized in that: The cooling assembly also includes an arc-shaped extension tube. Among the three adjacent cooling tubes, the two ends of the cooling tube located in the middle are connected to the two cooling tubes on both sides through two extension tubes respectively, and the bending directions of the two adjacent extension tubes are relatively arranged.

3. The motor stator according to claim 2, characterized in that: The diameter of one of the extension tube and the cooling tube varies along its length direction to form a step surface facing the other one, and the step surface abuts against the other one.

4. The motor stator according to claim 1, characterized in that: One of the extension tube and the cooling tube is inserted into the other; wherein: The extension tube and the cooling tube are interference fit, and / or, Glue is arranged between the extension tube and the cooling tube.

5. The motor stator according to claim 2, characterized in that: The tube wall of the extension tube is provided with a liquid outlet hole facing the iron core for spraying cooling liquid toward the iron core.

6. The motor stator according to claim 1, characterized in that: A plurality of cooling assemblies are provided, and the plurality of cooling assemblies are distributed along the circumference of the iron core, and a plurality of cooling pipes in the plurality of cooling assemblies are passed through a plurality of the winding slots.

7. The motor stator according to claim 1, characterized in that: A plurality of cooling pipes in the cooling assembly are inserted into a plurality of the winding slots; The cooling components are provided in plurality, and among the plurality of cooling components, the cooling tubes located in the same winding slot are arranged along the radial direction of the iron core and are alternately arranged with the plurality of winding wires.

8. The motor stator according to claims 1-7, characterized in that: The cooling components are provided in plurality, and the motor stator further comprises a water inlet and outlet component, and the water inlet and outlet component comprises a plurality of liquid inlet pipes and a plurality of liquid outlet pipes respectively connected with the plurality of cooling components, wherein: The water inlet and outlet assembly further includes a liquid inlet joint, which has a plurality of first interfaces, one of which is used to receive cooling liquid, and the remaining first interfaces are respectively connected to the other ends of the plurality of liquid inlet pipes; and / or, The water inlet and outlet assembly also includes a liquid outlet joint, which has a plurality of second interfaces, one of which is used to discharge the cooling liquid, and the remaining second interfaces are respectively connected to the other ends of the plurality of liquid outlet pipes.

9. A method for installing a cooling assembly, characterized in that: Used to install the cooling assembly as claimed in claims 1-8, the cooling assembly also includes an arc-shaped extension pipe, and among the three adjacent cooling pipes, the two ends of the cooling pipe located in the middle are respectively connected to the two cooling pipes on both sides through two extension pipes, and the bending directions of the two adjacent extension pipes are arranged oppositely. The installation method of the cooling assembly includes the following steps: Using one of the extension tubes to combine every two adjacent cooling tubes into one, so as to obtain a plurality of tube groups, wherein the extension tube in each of the tube groups is located at the same end of the two cooling tubes; Inserting a plurality of cooling tubes in a plurality of the tube groups into a plurality of winding slots of the iron core; An extension tube is used to combine two adjacent cooling tubes in two adjacent tube groups into one.

10. The method for installing a cooling assembly according to claim 9, characterized in that: The step of combining every two adjacent cooling tubes into one by using an extension tube comprises: arranging a plurality of cooling tubes side by side, exposing one end of the extension tube, and installing the extension tube at one end of the plurality of cooling tubes; and / or, The step of inserting a plurality of cooling tubes in a plurality of tube groups into a plurality of winding slots of the iron core comprises: installing the plurality of cooling tubes in the same direction; and / or, The step of combining two adjacent cooling tubes in two adjacent tube groups into one using an extension tube comprises: fixing the tube group, exposing one end of the cooling tube away from the extension tube, and installing the remaining extension tube.

Images