Motor

Abstract

The utility model discloses a motor. The motor comprises a housing and a stator core. The shell sleeves the outer side of the stator iron core, the inner side of the stator iron core extends along the radial direction to form a plurality of iron core columns, each iron core column is wound with a stator winding, and the two sides of each iron core column along the circumferential direction of the motor are respectively provided with a vapor chamber; a body of each soaking plate is located on the side edge of the iron core column in the circumferential direction of the motor and connected with the stator winding, at least one end of the body in the axial direction of the motor extends to form a heat conduction part, and the heat conduction part extends out of the end of the stator iron core, extends to the shell in the radial direction of the motor and abuts against the end of the stator iron core. A vertical connecting face is formed at the end, close to the shell, of the heat conduction part and connected with the inner side face of the shell. The motor has the advantages of being good in heat dissipation performance, small in size, light in weight, good in operation stability, low in requirement for the whole vehicle heat dissipation working condition and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor heat dissipation, and particularly relates to a motor. Background Art

[0002] When the motor is working, it converts electrical energy into mechanical energy, which in turn drives the mechanical structure to operate. Due to the winding copper wire resistance and stator eddy current in the motor, part of the electrical energy flowing through the motor will be converted into thermal energy, which becomes the main heat source for the motor temperature to rise.

[0003] At present, traditional motors are cooled only by liquid cooling in the motor housing, oil cooling in the stator wire package or air cooling. The passive heat dissipation of the motor stator is limited, and the windings in the slots are insufficiently cooled, resulting in a high temperature of the motor stator. In order to meet different power and torque requirements, the size of the motor has to be made larger and larger, which is not conducive to the energy consumption and space requirements of new energy vehicles. Utility Model Content

[0004] In view of the above problems, the utility model discloses a motor to overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a motor, comprising a housing and a stator core;

[0007] The housing is sleeved on the outer side of the stator core, and a plurality of core columns are radially extended on the inner side of the stator core, each of which is wound with a stator winding, and each of which is provided with a heat spreader on both sides of the core column along the circumference of the motor;

[0008] The main body of each of the heat spreaders is located on the side of the core column along the circumferential direction of the motor and is connected to the stator winding. A heat conducting portion is extended from at least one end of the main body along the axial direction of the motor. The heat conducting portion extends from the end of the stator core and extends to the shell along the radial direction of the motor. The heat conducting portion is abutted against the end of the stator core, and a vertical connecting surface is formed at one end of the heat conducting portion close to the shell, and the vertical connecting surface is connected to the inner side surface of the shell.

[0009] Furthermore, a thermally conductive glue or a thermally conductive paint is provided between the heat spreader and the stator winding.

[0010] Furthermore, the body is wrapped around the outer side surface of the stator winding along the circumferential direction of the motor, and the length of the body along the axial direction of the motor is consistent with the length of the stator winding along the axial direction of the motor;

[0011] The two ends of the main body along the axial direction of the motor are respectively formed with wrapping parts perpendicular to the main body, and the wrapping parts are used to wrap the outer end surface of the stator winding along the axial direction of the motor, and each of the wrapping parts is connected to the heat conducting part.

[0012] Furthermore, the body is arranged between the core column and the stator winding, and the length of the body along the axial direction of the motor is consistent with the length of the core column along the axial direction of the motor;

[0013] The two ends of the main body along the axial direction of the motor are respectively formed with wrapping parts perpendicular to the main body, and the wrapping parts are used to wrap the end surface of the core column along the axial direction of the motor, and each of the wrapping parts is connected to the heat conducting part.

[0014] Furthermore, the wrapping parts of the two heat spreaders located on the end surface of the same core column are fixedly connected, and the wrapping part and the end of the main body away from the motor axis are both provided with a first flange, and the wrapping part and the end of the main body close to the motor axis are both provided with a second flange.

[0015] Furthermore, fixing grooves are formed on the outer side surface of the wrapping portion and the outer side surface of the body. The fixing grooves are arranged along the winding direction of the copper wires in the stator winding for accommodating the copper wires in the stator winding.

[0016] Furthermore, the body is arranged between the core column and the stator winding, and the length of the body along the axial direction of the motor is consistent with the length of the core column along the axial direction of the motor, so that the body completely covers the side of the core column along the circumferential direction of the motor;

[0017] The bodies of the two heat spreaders between two adjacent core columns are fixedly connected at one end away from the motor axis.

[0018] Furthermore, the body is arranged between the copper wire layers of the stator winding, and the length of the body along the axial direction of the motor is consistent with the length of the stator winding along the axial direction of the motor;

[0019] A wrapping portion perpendicular to the body is formed at at least one end of the body along the axial direction of the motor, the wrapping portion is used to wrap the outer end surface of the stator winding along the axial direction of the motor, and the heat conducting portion is connected to the wrapping portion.

[0020] Furthermore, the main body is composed of a plurality of heat-averaging tube wires arranged in parallel along the axial direction of the motor, the heat-averaging tube wires are arranged at intervals, and the copper wires in the stator winding are inserted between the heat-averaging tube wires.

[0021] Furthermore, the wrapping parts and the heat conducting parts of the two heat spreaders located on the end surface of the same core column are respectively fixedly connected.

[0022] The advantages and beneficial effects of the utility model are:

[0023] In the motor of the utility model, heat spreaders are respectively arranged on both sides of the core column along the circumference of the motor, and the body of the heat spreader is located on the side of the core column and connected to the stator winding. The heat conducting portion of the heat spreader extends from the end of the stator core and is connected to the shell through a vertical connecting surface, so that the heat generated on the stator winding can be quickly conducted to the shell through the heat spreader, thereby improving the heat dissipation efficiency of the motor; and, the motor of this structure has a smaller volume, lighter weight, better operating stability, and lower requirements on the heat dissipation working conditions of the whole vehicle while meeting the same power and torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0025] Figure 1 The figure is an assembly structure diagram of the stator and housing of the motor in Example 1;

[0026] Figure 2 It is a three-dimensional structural diagram of the heat sink in Example 1;

[0027] Figure 3 The figure is an assembly structure diagram of the stator and housing of the motor in Example 2;

[0028] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0029] Figure 5 It is a three-dimensional structural diagram of two soaking plates on the same core column in Example 2;

[0030] Figure 6 The figure is an assembly structure diagram of the stator and housing of the motor in Example 3;

[0031] Figure 7 It is a three-dimensional structural diagram of two soaking plates between two adjacent core columns in Example 3;

[0032] Figure 8 This is an assembly structure diagram of the stator and housing of the motor in Example 4.

[0033] In the figure: 1. Shell; 2. Stator core; 3. Core column; 4. Stator winding; 5. Heat spreader; 5-1. Main body; 5-2. Heat conducting part; 5-3. Vertical connecting surface; 5-4. Wrapping part; 5-5. First flange; 5-6. Second flange. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0036] Example 1

[0037] This embodiment provides a motor such as Figure 1 As shown, Figure 1 and Figure 2 As shown, the motor includes a housing 1 and a stator core 2 .

[0038] Among them, the shell 1 is sleeved on the outer side of the stator core 2, and a plurality of core columns 3 are radially extended on the inner side of the stator core 2. Stator windings are wound on each core column 3, and each core column 3 is provided with a heat spreader 5 on both sides along the circumference of the motor, that is, a heat spreader 5 is provided on the side of each core column 3 adjacent to other core columns 3, and two heat spreaders 5 are provided on one core column 3.

[0039] It should be noted that the heat spreader is a vacuum cavity with a microstructure on the inner wall, usually made of copper. When heat is conducted from the heat source to the evaporation zone of the heat spreader, the coolant in the cavity of the heat spreader begins to vaporize after being heated in a low vacuum environment. At this time, it absorbs heat energy and expands rapidly in volume. The gaseous cooling medium quickly fills the entire cavity. When the gaseous cooling medium contacts a relatively cold area, condensation will occur, and the heat accumulated during evaporation will be released through condensation. The condensed coolant will return to the evaporation heat source through the microstructured capillary channels, and this operation will be repeated in the cavity.

[0040] Specifically, the body 5-1 of each heat spreader is located on the side of the core column 3 along the circumference of the motor and is connected to the stator winding, so that the heat generated on the stator winding will be conducted to the body 5-1 of the heat spreader. A heat conducting portion 5-2 extends from at least one end of the body 5-1 along the axial direction of the motor. The heat conducting portion 5-2 extends from the end of the stator core 2 and extends to the housing 1 along the radial direction of the motor. The heat conducting portion 5-2 is attached to the end of the stator core 2, and a vertical connecting surface 5-3 is formed at one end of the heat conducting portion 5-2 close to the housing 1. The vertical connecting surface 5-3 is connected to the inner side surface of the housing 1, so that the contact area between the heat spreader 5 and the housing 1 is larger, which is convenient for conducting the heat on the heat spreader 5 to the housing 1. In addition, a thermal conductive adhesive can be provided between the vertical connecting surface and the housing to ensure that the vertical connecting surface and the housing are more firmly connected and the heat on the vertical connecting surface is more easily conducted to the housing.

[0041] In this way, the heat generated by the stator winding is conducted to the body of the heat spreader, causing the liquid cooling medium in the heat spreader to evaporate due to the heat to form a gaseous cooling medium. In this process, a large amount of heat will be absorbed, so that the stator winding can be cooled. The gaseous cooling medium diffuses in the heat spreader and reaches the vertical connecting surface through the heat conduction part of the heat spreader. Since the shell temperature is relatively low, the gaseous cooling medium condenses into a liquid cooling medium at the vertical connecting surface of the heat spreader and releases a large amount of heat. The released heat will be conducted to the shell and released to the outside of the motor through the shell, and the liquid cooling medium formed by condensation will return to the body of the heat spreader and repeat the evaporation cycle.

[0042] In summary, in the motor of this embodiment, heat spreaders are respectively arranged on both sides of the core column along the circumference of the motor, and the main body of the heat spreader is located on the side of the core column and connected to the stator winding. The heat conducting portion of the heat spreader extends from the end of the stator core and is connected to the shell through a vertical connecting surface, so that the heat generated on the stator winding can be quickly conducted to the shell through the heat spreader, thereby improving the heat dissipation efficiency of the motor; and, the motor of this structure has a smaller size, lighter weight, better operating stability, and lower requirements on the heat dissipation conditions of the entire vehicle while meeting the same power and torque.

[0043] In this embodiment, a thermally conductive glue or a thermally conductive paint is provided between the heat spreader and the stator winding, which not only enables a fixed connection between the heat spreader and the stator winding, but also improves the heat conduction effect between the stator winding and the heat spreader.

[0044] In addition, the body is wrapped around the outer side of the stator winding along the circumferential direction of the motor, and the length of the body along the axial direction of the motor is consistent with the length of the stator winding along the axial direction of the motor, so that the contact area between the stator winding and the body is larger, thereby achieving better heat dissipation effect of the stator winding.

[0045] In addition, if Figure 1 and Figure 2As shown, wrapping parts 5-4 perpendicular to the main body are formed at both ends of the main body 5-1 along the axial direction of the motor. The wrapping parts 5-4 are used to wrap the outer end faces of the stator windings along the axial direction of the motor. Each wrapping part 5-4 is connected to a heat conducting part 5-2, so that the ends of the stator windings 4 along the axial direction of the motor can also dissipate heat through the heat spreader 5.

[0046] In addition, a cooling water channel is formed in the shell that contacts the vertical connection surface of the heat spreader. The heat conducted to the shell by the vertical connection surface of the heat spreader will be quickly taken away by the coolant in the cooling water channel, thereby improving the cooling effect of the motor.

[0047] By comparing the motor in this embodiment with a motor without a heat spreader, it is found that after the heat spreader is added to the motor, the maximum temperature inside the motor is reduced from the original 329.8°C to 136.9°C, a decrease of 58.5%, which effectively improves the insulation performance and heat dissipation efficiency of the motor. Even a small motor can achieve strong continuous output performance.

[0048] Example 2

[0049] The difference from Example 1 is that Figures 3 to 5 As shown, the body 5 - 1 in this embodiment is arranged between the core column 3 and the stator winding 4 , and the length of the body 5 - 1 along the axial direction of the motor is consistent with the length of the core column 3 along the axial direction of the motor.

[0050] The two ends of the main body 5-1 along the axial direction of the motor are respectively formed with wrapping parts 5-4 perpendicular to the main body 5-1, and the wrapping parts 5-4 are used to wrap the end faces of the core column 3 along the axial direction of the motor. The copper wire in the stator winding 4 is coiled on the main body 5-1 and the wrapping parts 5-4, and can fully contact with the heat spreader 5. Each wrapping part 5-4 is connected to a heat conducting part 5-2.

[0051] And, if Figure 5 As shown, the wrapping parts 5-4 of the two heat spreaders on the end surface of the same core column 3 are fixedly connected, so that the two heat spreaders 5 on both sides of the core column 3 become an integrated structure, and the two heat spreaders 5 form an annular structure, which is sleeved on the core column 3, so that the heat spreader 5 and the core column 3 are more firmly connected, and the wrapping part 5-4 and the end of the body 5-1 away from the motor axis are provided with a first flange 5-5, and the wrapping part 5-4 and the end of the body 5-1 close to the motor axis are provided with a second flange 5-6, and the first flange 5-5 and the second flange 5-6 are used for limiting the copper wire in the stator winding 4, which can prevent the stator winding 4 wound on the heat spreader 5 from detaching from the heat spreader. The heat spreader of the above structure can realize the support and fixation of the stator winding, and can play the role of an insulating skeleton, so there is no need to set an insulating skeleton in the motor, making the structure of the motor simpler.

[0052] Furthermore, fixing grooves are formed on the outer side surface of the wrapping portion and the outer side surface of the main body. The fixing grooves are arranged along the winding direction of the copper wire in the stator winding to accommodate the copper wire in the stator winding so that the stator winding can be firmly wound on the heat spreader.

[0053] Example 3

[0054] The difference from Example 1 is that Figure 6 and Figure 7 As shown, the main body 5-1 in this embodiment is arranged between the core column 2 and the stator winding 4, so that the stator winding 4 is coiled on the heat spreader 5, and the length of the main body 5-1 along the axial direction of the motor is consistent with the length of the core column 3 along the axial direction of the motor, so that the main body 5-1 completely covers the side of the core column 3 along the circumferential direction of the motor.

[0055] And, if Figure 7 As shown, the main bodies 5-1 of the two heat spreaders between two adjacent core columns 3 are fixedly connected at one end away from the motor axis, so that the two heat spreaders 5 between the two core columns 3 become an integrated structure, which plays the role of setting insulating paper in the stator slot. Therefore, there is no need to set insulating paper in the motor, making the structure of the motor simpler.

[0056] Example 4

[0057] The difference from Example 1 is that Figure 8 As shown, the main body 5-1 in this embodiment is arranged between the copper wire layers of the stator winding 4, that is, the inner side and the outer side of the main body 5-1 are in contact with the stator winding 4, so that the heat dissipation effect of the stator winding 4 is better, and the length of the main body 5-1 along the axial direction of the motor is consistent with the length of the stator winding 4 along the axial direction of the motor.

[0058] A wrapping portion 5-4 perpendicular to the main body 5-1 is formed at one end of the main body 5-1 along the axial direction of the motor. The wrapping portion 5-4 is used to wrap the outer end surface of the stator winding 4 along the axial direction of the motor so that the inner side surface of the wrapping portion 5-4 contacts the stator winding 4. The wrapping portion 5-4 is connected to the heat conducting portion 5-2.

[0059] Of course, in other embodiments, both ends of the body along the axial direction of the motor may also be formed with wrapping portions perpendicular to the body.

[0060] In this embodiment, the main body is composed of a plurality of heat-spreading tube wires arranged in parallel along the axial direction of the motor. The heat-spreading tube wires are arranged at intervals, and the copper wires in the stator winding are inserted between the heat-spreading tube wires, thereby increasing the contact area between the heat-spreading plate and the stator winding, and realizing cooling of the inside of the stator winding.

[0061] In addition, if Figure 8As shown, the wrapping parts 5-4 and the heat conducting parts 5-2 of the two heat spreaders on the end surface of the same core column 3 are fixedly connected respectively, so that the two heat spreaders 5 on both sides of the core column 3 become an integrated structure, thereby reducing the number of parts and processing difficulty of the motor.

[0062] The above description is only a specific implementation of the present invention. Under the above teaching of the present invention, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present invention, and the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A motor, It is characterized in that including a housing and a stator core; The housing is sleeved on the outer side of the stator core, and a plurality of core columns are radially extended on the inner side of the stator core, each of which is wound with a stator winding, and each of which is provided with a heat spreader on both sides of the core column along the circumference of the motor; The main body of each of the heat spreaders is located on the side of the core column along the circumferential direction of the motor and is connected to the stator winding. A heat conducting portion is extended from at least one end of the main body along the axial direction of the motor. The heat conducting portion extends from the end of the stator core and extends to the shell along the radial direction of the motor. The heat conducting portion is abutted against the end of the stator core, and a vertical connecting surface is formed at one end of the heat conducting portion close to the shell, and the vertical connecting surface is connected to the inner side surface of the shell.

2. The motor according to claim 1, It is characterized in that Thermally conductive glue or thermally conductive paint is provided between the heat spreader and the stator winding.

3. The electric machine according to claim 1 or 2, It is characterized in that The body is wrapped around the outer side surface of the stator winding along the circumferential direction of the motor, and the length of the body along the axial direction of the motor is consistent with the length of the stator winding along the axial direction of the motor; The two ends of the main body along the axial direction of the motor are respectively formed with wrapping parts perpendicular to the main body, and the wrapping parts are used to wrap the outer end surface of the stator winding along the axial direction of the motor, and each of the wrapping parts is connected to the heat conducting part.

4. The electric machine according to claim 1 or 2, It is characterized in that The body is arranged between the iron core column and the stator winding, and the length of the body along the axial direction of the motor is consistent with the length of the iron core column along the axial direction of the motor; The two ends of the main body along the axial direction of the motor are respectively formed with wrapping parts perpendicular to the main body, and the wrapping parts are used to wrap the end surface of the core column along the axial direction of the motor, and each of the wrapping parts is connected to the heat conducting part.

5. The motor according to claim 4, It is characterized in that The wrapping parts of the two heat spreaders located on the end surface of the same core column are fixedly connected, and the wrapping part and the end of the body away from the motor axis are both provided with a first flange, and the wrapping part and the end of the body close to the motor axis are both provided with a second flange.

6. The electric machine according to claim 4, It is characterized in that Fixing grooves are formed on the outer side surface of the wrapping portion and the outer side surface of the body. The fixing grooves are arranged along the winding direction of the copper wires in the stator winding and are used to accommodate the copper wires in the stator winding.

7. The electric machine according to claim 1 or 2, It is characterized in that The body is arranged between the core column and the stator winding, and the length of the body along the axial direction of the motor is consistent with the length of the core column along the axial direction of the motor, so that the body completely covers the side of the core column along the circumferential direction of the motor; The bodies of the two heat spreaders between two adjacent core columns are fixedly connected at one end away from the motor axis.

8. The electric machine according to claim 1 or 2, It is characterized in that The body is arranged between the copper wire layers of the stator winding, and the length of the body along the axial direction of the motor is consistent with the length of the stator winding along the axial direction of the motor; A wrapping portion perpendicular to the body is formed at at least one end of the body along the axial direction of the motor, the wrapping portion is used to wrap the outer end surface of the stator winding along the axial direction of the motor, and the heat conducting portion is connected to the wrapping portion.

9. The electric machine according to claim 8, It is characterized in that The main body is composed of a plurality of heat-averaging tube wires arranged in parallel along the axial direction of the motor, the heat-averaging tube wires are arranged at intervals, and the copper wires in the stator winding are inserted between the heat-averaging tube wires.

10. The electric machine according to claim 8, It is characterized in that The wrapping parts and the heat conducting parts of the two heat spreaders located on the end surface of the same core column are respectively fixedly connected.

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