A stator heat dissipation structure and air-cooled motor

Abstract

The present application relates to a stator heat dissipation structure and an air-cooled motor, which belongs to the field of motor heat dissipation technology, and includes a radiator and a plurality of stator cores, wherein the radiator is provided with a plurality of first heat dissipation channels, which are connected from the top of the radiator to the bottom thereof, and the circumferential surface of the radiator is provided with a plurality of fixing holes; a heat conducting rod is provided at the top and the bottom of the stator core, and a coil is wound around the stator core and the heat conducting rod together, that is, the stator core and the heat conducting rod are fixed by the coil; the stator core is arranged along the circumference of the radiator, the heat conducting rod corresponds to the fixing hole one by one, the heat conducting rod is interference fit with the corresponding fixing hole, and the side of the stator core facing the radiator is fitted with the radiator. The present application has the effect of improving the heat dissipation efficiency of the stator core.

Description

Technical Field

[0001] The present application relates to the technical field of motor heat dissipation, and in particular to a stator heat dissipation structure and an air-cooled motor. Background Art

[0002] In the existing motor heat dissipation technology, the heat dissipation of the stator has always been one of the key factors affecting the performance and life of the motor. Since a large amount of heat is generated during the operation of the motor stator core, it must be discharged in time through an effective heat dissipation structure to prevent overheating from affecting the operation of the motor. However, the stator generally cannot be directly in contact with the outside air for heat dissipation, because impurities such as dust and moisture can easily enter the inside of the motor and affect the service life of the stator. Therefore, two main heat dissipation methods are usually adopted: one is to open a heat dissipation channel inside the motor to allow air flow to take away the heat; the other is to design a special heat dissipation shell to transfer the heat of the stator core to the heat dissipation shell, and then dissipate the heat through the contact between the heat dissipation shell and the outside air.

[0003] Regardless of the above forms, the existing heat dissipation structure usually only has one side of the stator core in contact with the heat dissipation shell or the heat conduction surface inside the motor to conduct heat. This design has low heat transfer efficiency and poor heat dissipation effect. Especially in high-power motors, insufficient heat dissipation may cause the stator to overheat, thereby affecting the performance and life of the motor. Summary of the invention

[0004] In order to improve the heat dissipation efficiency of the stator core, the present application provides a stator heat dissipation structure and an air-cooled motor.

[0005] A stator heat dissipation structure provided in this application adopts the following technical solution:

[0006] A stator heat dissipation structure comprises a radiator and a plurality of stator cores, wherein the radiator is provided with a plurality of first heat dissipation channels, the first heat dissipation channels run from the top of the radiator to the bottom thereof, and a plurality of fixing holes are provided on the circumference of the radiator;

[0007] The top and bottom of the stator core are both provided with heat conducting rods, and the stator core and the heat conducting rods are wound with a coil, that is, the stator core and the heat conducting rods are fixed by the coil;

[0008] The stator core is arranged along the circumference of the radiator, the heat conducting rods correspond to the fixing holes one by one, the heat conducting rods are interference fit with the corresponding fixing holes, and the side of the stator core facing the radiator is in contact with the radiator.

[0009] By adopting the above technical solution, heat conducting rods are arranged on the top and bottom surfaces of the stator core, which can effectively conduct heat to the radiator through the heat conducting rods. At the same time, the side of the stator core directly fits the peripheral surface of the radiator, so that the heat of the stator core is transferred to the radiator through three different surfaces (top, bottom and side), and then the heat dissipation channel allows air flow to pass through the radiator to take away the heat of the radiator, thereby achieving heat dissipation of the stator core. Compared with traditional designs, this multi-faceted heat dissipation method greatly improves the heat conduction path and efficiency, and can reduce the temperature of the stator core more quickly;

[0010] Moreover, the coil is not only wound on the stator core, but also wrapped on the heat conducting rod. This means that the heat generated by the coil can also be effectively transferred to the radiator through the heat conducting rod, avoiding the heat accumulation of the coil locally, thus preventing overheating damage. This design makes the heat dissipation of the coil more efficient, further improving the overall heat dissipation effect;

[0011] At the same time, the thermal rod not only conducts heat, but also serves as a connecting structure to fix the stator core to the radiator, which avoids the use of additional connecting structures and parts. The thermal rod and the stator core are fixed together by the wire package, and no additional fasteners are required, simplifying the overall design.

[0012] Moreover, this stator heat dissipation structure can be applied to both inner rotor motors and outer rotor motors, and has strong adaptability. When applied to inner rotor motors, the fixing holes can be opened on the inner circumference of the radiator, the stator core can be installed on the inner circumference of the radiator, and the rotor can be arranged on the inner circumference of the stator core; when applied to outer rotor motors, the fixing holes can be opened on the outer circumference of the radiator, the stator core can be installed on the outer circumference of the radiator, and the rotor can be arranged on the outer circumference of the stator core.

[0013] Therefore, this stator heat dissipation structure not only performs well in heat dissipation, but also simplifies the entire system through the multifunctionality of the heat conductive rod (both a heat conductor and a connector), and has strong adaptability. While improving the heat dissipation efficiency of the stator core, it reduces the complexity of manufacturing, assembly and maintenance. It has a positive impact on the performance, cost control and reliability of the overall motor.

[0014] Optionally, the thermally conductive rod includes a first rod body and a second rod body, the first rod body and the second rod body are integrally formed, the first rod body is a cylindrical rod body, the circumferential surface of the second rod body is composed of a combination of an arc surface and a plane, and the end of the second rod body is embedded in the first rod body, the plane extension surface of the second rod body is tangent to the circumferential surface of the first rod body, the plane of the second rod body is in contact with the stator core, and the coil is wound on the arc surface of the second rod body.

[0015] By adopting the above technical solution, the plane design of the second rod enables it to fit tightly with the surface of the stator core. This design directly increases the contact area for heat conduction and improves the efficiency of heat transfer from the stator core to the second rod. In addition, the coil wrapped around the arc surface of the second rod also increases the contact area between the second rod and the coil, ensuring that the heat generated by the coil can be quickly transferred to the radiator. This design ensures that the heat of the stator core and the coil is effectively transferred through multiple paths, significantly improving the overall heat dissipation effect.

[0016] Moreover, by forming the first rod and the second rod in one piece, the problem of poor contact between the two parts is eliminated. Compared with the split design, the one-piece structure has no seams, avoiding thermal resistance between contact surfaces, ensuring that heat can be smoothly and quickly transferred from the second rod to the first rod, and then from the first rod to the heat sink, improving thermal conductivity efficiency.

[0017] The design of the embedded structure can enhance the overall strength of the heat conducting rod. The second rod is partially embedded in the first rod. This "embedded" structural design increases the contact and support area between the first rod and the second rod, making the entire heat conducting rod more stable when subjected to thermal expansion and mechanical stress, reducing structural deformation due to local stress concentration, and further improving the stability of the heat conducting rod when connected to the stator core and the heat sink.

[0018] Furthermore, the planar extension surface of the second rod body is tangent to the peripheral surface of the first rod body, which ensures that the end surface of the second rod body and the end surface of the first rod body have the largest overlap area, thereby improving the heat conduction efficiency and further improving the heat dissipation efficiency.

[0019] Optionally, the radiator is in a cylindrical sleeve shape, and a plurality of first heat dissipation channels are equidistantly distributed along the circumference of the radiator. The width of each of the first heat dissipation channels along the direction from the outer circumference to the inner circumference of the radiator is first kept constant, then increases, and then gradually decreases. One end of the fixing hole that passes through the circumference of the radiator is tapered.

[0020] The radiator is also provided with a second heat dissipation channel, which runs through the top and bottom surfaces of the radiator. The length of the second heat dissipation channel is shorter than that of the first heat dissipation channel. The second heat dissipation channel is arranged adjacent to the narrow section of the first heat dissipation channel, and the second heat dissipation channel and the first heat dissipation channel are arranged at intervals.

[0021] By adopting the above technical solution, the first heat dissipation channel is designed so that the connection part on the radiator will not gradually narrow as it approaches the central axis of the radiator, thereby preventing the narrow section of the connection part from breaking when the high-pressure airflow passes through the radiator;

[0022] The design of the second heat dissipation channel effectively solves the problem of reduced flow when the airflow passes through the narrow section of the first channel. At the same time, the spacing between the first heat dissipation channel and the second heat dissipation channel can better disperse the airflow. The design of more airflow channel separation can improve the overall heat dissipation effect and ensure a more uniform airflow through the radiator to effectively remove heat. This not only strengthens the mechanical stability of the radiator, but also improves the heat dissipation efficiency.

[0023] Optionally, the stator core is equidistantly arranged around the outer circumference of the radiator, the fixing holes penetrate to the outer circumference of the radiator, the side of the stator core facing the radiator is an arc-shaped surface, and the curvature of the arc-shaped surface of the stator core is the same as the curvature of the outer circumference of the radiator.

[0024] By adopting the above technical solution, a combination of a stator core and a radiator in an outer rotor motor is provided, wherein the arc surface of the stator core and the outer peripheral surface of the radiator have the same curvature, thereby ensuring that the stator core can be in close contact with the surface of the radiator and maximizing the contact area between the stator core and the radiator, thereby improving the efficiency of transferring heat from the stator core to the radiator.

[0025] Optionally, a first threading hole is formed on the outer circumference of the radiator, and a second threading hole is formed on the inner circumference of the radiator, and the connector of the wire package can pass through the first threading hole and the second threading hole in sequence.

[0026] By adopting the above technical solution, a reasonable wiring channel is provided for the electrical connection, and the exposed part of the wire package connector is reduced, thereby optimizing the internal space utilization and improving the compactness of the overall structure.

[0027] The present application provides an air-cooled motor adopting the following technical solution:

[0028] A wind-cooled motor uses the above-mentioned stator heat dissipation structure, including a connecting shell and a rotor, the rotor is installed in the connecting shell, the radiator is equipped with a sealing cover, the sealing cover covers all the stator cores, the rotor is arranged around the outer periphery of the stator core, the connecting shell is equipped with a centrifugal fan, the centrifugal fan is coaxially connected with a connecting plate, the connecting plate is used to connect with an external component, the connecting plate is coaxially connected with a rotating shaft, a bearing is arranged on the rotating shaft, the rotating shaft is coaxially inserted into the radiator, the bearing is located between the radiator and the rotating shaft, and the end of the radiator facing away from the connecting plate is connected to a controller.

[0029] By adopting the above technical solution, a self-heating motor with an outer rotor is provided, wherein the external component is connected to the connecting plate, and after the controller controls the corresponding coil to be energized, the rotor can drive the connecting shell to rotate, and the connecting shell drives the centrifugal fan and the connecting plate to rotate, thereby realizing the driving of the external component, and the centrifugal fan can suck airflow into the interior of the motor, and the airflow passes through the first heat dissipation channel and takes away the heat of the radiator, thereby realizing the air-cooled self-heating function of the motor;

[0030] By setting the bearing and the rotating shaft in the inner ring of the radiator and placing the controller at the end of the radiator away from the connecting plate, the overall structural compactness is improved, the external occupied space is reduced, and the mechanical stability of the system is improved. This highly integrated design can effectively shorten the manufacturing cycle and simplify the assembly process;

[0031] The motor using the stator heat dissipation structure of the present application can avoid the performance degradation of the motor due to overheating by improving the heat dissipation performance, thereby ensuring that the motor can still maintain stable output at higher power, which is beneficial to improving the performance of the motor.

[0032] Optionally, the sealing cover includes an annular bottom plate and an annular cover body, the annular bottom plate is connected to the bottom of the radiator and the two are coaxial, the annular cover body is connected to the top of the radiator and the two are coaxial, the annular cover body covers the stator core, the annular cover body, the annular bottom plate and the heat dissipation outer peripheral surface form an annular space, and the stator core is located in the annular space.

[0033] By adopting the above technical solution, the annular cover and the bottom plate completely cover the stator core to form a closed environment, which effectively blocks the entry of external pollutants such as dust and particles, and maintains the service life of the stator core and the winding.

[0034] Optionally, the bottom of the connecting shell is bolted to an annular grid plate.

[0035] By adopting the above technical solution, the annular grille plate facilitates the airflow to diffuse and discharge after passing through the first heat dissipation channel, and the diffused airflow can dissipate the heat of the controller.

[0036] Optionally, the controller includes a shell, which is connected to the radiator, and a plurality of silicon carbide control modules are arranged on the inner top wall of the shell. The shell is a combination structure of a cone and a cylinder, and the shell is provided with a plurality of guide grooves equidistantly along its outer circumference, and the guide grooves extend through the top and bottom surfaces of the shell.

[0037] By adopting the above technical solution, the airflow can flow along the guide groove after passing through the first heat dissipation channel, thereby increasing the contact area between the airflow and the shell and improving the heat dissipation effect. At the same time, the heat of the silicon carbide control module can also be transferred to the shell for heat dissipation.

[0038] Optionally, an annular mounting shell is coaxially mounted on the top of the radiator, and an annular sealing ring is provided between the annular mounting shell and the rotating shaft.

[0039] By adopting the above technical solution, the entry of air pollutants and water vapor into the bearing can be reduced, thereby increasing the service life of the bearing.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. Heat conducting rods are installed on the top and bottom surfaces of the stator core, which can effectively conduct heat to the radiator through the heat conducting rods. At the same time, the side of the stator core directly fits the circumference of the radiator, so that the heat of the stator core is transferred to the radiator through three different surfaces (top, bottom and side), and then the heat dissipation channel allows air to pass through the radiator to take away the heat of the radiator, thereby achieving heat dissipation of the stator core. Compared with traditional designs, this multi-faceted heat dissipation method greatly improves the heat conduction path and efficiency, and can reduce the temperature of the stator core more quickly;

[0042] 2. The coil is not only wound around the stator core, but also wrapped around the heat conducting rod. This means that the heat generated by the coil can also be effectively transferred to the radiator through the heat conducting rod, avoiding the local accumulation of heat in the coil, thereby preventing overheating damage. This design makes the heat dissipation of the coil more efficient, further improving the overall heat dissipation effect;

[0043] 3. The heat conducting rod not only conducts heat, but also serves as a connecting structure to fix the stator core to the radiator, which avoids the use of additional connecting structures and parts. The heat conducting rod and the stator core are fixed together through the wire package, and no additional fasteners are required, which simplifies the overall design;

[0044] 4. The plane design of the second rod enables it to fit tightly with the surface of the stator core. This design directly increases the contact area for heat conduction and improves the efficiency of heat transfer from the stator core to the second rod. In addition, the coil wrapped around the arc surface of the second rod also increases the contact area between the second rod and the coil, ensuring that the heat generated by the coil can be quickly transferred to the radiator. This design ensures that the heat of the stator core and the coil is effectively transferred through multiple paths, significantly improving the overall heat dissipation effect;

[0045] 5. The centrifugal fan can suck air into the interior of the motor. The air passes through the first heat dissipation channel and takes away the heat of the radiator, thereby realizing the air-cooled self-heating function of the motor. By arranging the bearing and the rotating shaft in the inner ring of the radiator and placing the controller at the end of the radiator away from the connecting plate, the first threading hole and the second threading hole provide a reasonable wiring channel for the electrical connection, reducing the exposed part of the wire package connector, thereby optimizing the internal space utilization, improving the overall structural compactness, reducing the external occupied space, and improving the mechanical stability of the system. This highly integrated design can effectively shorten the manufacturing cycle and simplify the assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the stator heat dissipation structure in the embodiment of the present application.

[0047] Figure 2 It is a structural schematic diagram of a radiator used in an embodiment of the present application.

[0048] Figure 3 It is a schematic diagram of the structure of the first threading hole and the second threading hole used in an embodiment of the present application.

[0049] Figure 4 It is a schematic diagram of the structure of the heat conducting rod used in the embodiment of the present application.

[0050] Figure 5 It is a schematic diagram of the overall structure of the air-cooled motor in the embodiment of the present application.

[0051] Figure 6 It is a schematic diagram of the structure of the rotating shaft, the sealing cover and the rotor used in the embodiment of the present application.

[0052] Figure 7 yes Figure 6 Enlarged schematic diagram of part A.

[0053] Explanation of the reference numerals: 1. radiator; 11. first connecting hole; 12. second connecting hole; 13. raised seat; 14. third connecting hole; 15. fourth connecting hole; 16. first heat dissipation channel; 17. second heat dissipation channel; 18. fixing hole; 19. first threading hole; 110. second threading hole; 2. stator core; 3. heat conducting rod; 31. first rod body; 32. second rod body; 4. wire package; 5. rotating shaft; 51. bearing; 52. annular mounting shell; 53. annular sealing ring; 6. sealing cover; 61. annular base plate; 62. annular cover body; 7. centrifugal fan; 71. connecting plate; 72. connecting shell; 73. annular grille plate; 8. rotor; 9. controller; 91. housing; 911. guide groove; 92. mounting base plate; 93. silicon carbide control module; 94. low voltage power connector; 95. CAN communication connector; 96. high voltage DC connector. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-7 This application is described in further detail.

[0055] An embodiment of the present application discloses a stator heat dissipation structure.

[0056] like Figure 1 , Figure 2 and Figure 3 The stator heat dissipation structure includes a heat sink 1 and a plurality of stator cores 2. The heat sink 1 is in the shape of a cylindrical sleeve. The top surface of the heat sink 1 is provided with a plurality of first connection holes 11 and a plurality of second connection holes 12. The first connection holes 11 are arranged equidistantly along the inner circumference of the heat sink 1. The plurality of second connection holes 12 are arranged equidistantly along the outer circumference of the heat sink 1. The bottom of the heat sink 1 is provided with a protruding seat 13. The protruding seat 13 is coaxially cut and integrally formed with the heat sink 1. The bottom surface of the protruding seat 13 is provided with a plurality of third connection holes 14. The plurality of third connection holes 14 are arranged equidistantly along the circumference of the protruding seat 13. The bottom surface of the heat sink 1 is also provided with a plurality of fourth connection holes 15. The fourth connection holes 15 are arranged equidistantly along the outer circumference of the heat sink 1. The first connection holes 11, the second connection holes 12, the third connection holes 14 and the fourth connection holes 15 are all used to connect with other components of the motor.

[0057] The radiator 1 is provided with a plurality of first heat dissipation channels 16 and a plurality of second heat dissipation channels 17. The first heat dissipation channels 16 extend from the top surface of the radiator 1 to the bottom surface of the radiator 1. The first heat dissipation channels 16 are located between the first connecting holes 11 and the second connecting holes 12. The width of the first heat dissipation channels 16 is first kept constant along the direction from the outer peripheral surface of the radiator 1 to the central axis of the radiator 1, then increases, and then gradually decreases. That is, from the top view of the radiator 1, the first heat dissipation channels 16 are in the shape of an arrow pointing to the central axis of the radiator 1.

[0058] The second heat dissipation channel 17 runs from the top surface of the radiator 1 to the bottom surface of the radiator 1, and the width of the second heat dissipation channel 17 is always the same along the direction from the outer peripheral surface of the radiator 1 to the central axis of the radiator 1. The second heat dissipation channel 17 is also located between the first connection hole 11 and the second connection hole 12, and the second heat dissipation channel 17 is spaced apart from the first heat dissipation channel 16. From the top view of the radiator 1, the second heat dissipation channel 17 is approximately rectangular, and the second heat dissipation channel 17 is arranged close to the inner periphery of the radiator 1.

[0059] The radiator 1 is provided with a plurality of fixing holes 18 at equal intervals along its outer circumference. The fixing holes 18 are a combination of cylindrical and conical holes, and the conical hole section of the fixing hole 18 passes through the outer circumference of the radiator 1. The fixing holes 18 are arranged around the top and bottom of the radiator 1. The fixing holes 18 at the top and bottom of the radiator 1 correspond one to one, and the centers of the corresponding fixing holes 18 are located on the same generatrix of the radiator 1. Each fixing hole 18 is arranged at intervals with the first heat dissipation channel 16, and the fixing holes 18 correspond one to one with the second heat dissipation channel 17, and the fixing holes 18 are arranged toward the second heat dissipation channel 17.

[0060] A plurality of stator cores 2 are arranged around the outer circumference of the radiator 1, and adjacent stator cores 2 are spliced ​​together on the side facing the radiator 1. The curvature of the side of the stator core 2 facing the radiator 1 is the same as the curvature of the outer circumference of the radiator 1. The top and bottom surfaces of the stator core 2 are fitted with heat conducting rods 3, and the stator core 2 and the heat conducting rods 3 are fixed by winding the wire package 4. The heat conducting rods 3 correspond to the fixing holes 18 one by one, and one end of the heat conducting rod 3 extends into the corresponding fixing hole 18 and is interference fit, so that the stator core 2 is fixed on the radiator 1.

[0061] like Figure 1 and Figure 4 The heat conducting rod 3 includes a first rod body 31 and a second rod body 32, which are integrally formed. The first rod body 31 is a cylindrical rod body, and the circumference of the second rod body 32 is composed of a curved surface and a flat surface. The end of the second rod body 32 is embedded in the first rod body 31, and the plane extension surface of the second rod body 32 is tangent to the circumference of the first rod body 31. The plane of the second rod body 32 is in contact with the stator core 2, and the coil 4 is wound on the curved surface of the second rod body 32. The first rod body 31 is located in the fixing hole 18, and the end of the first rod body 31 away from the second rod body 32 abuts against the end surface of the fixing hole 18.

[0062] like Figure 3 The circumference of the heat sink 1 is equidistantly provided with a plurality of first threading holes 19 at the bottom, and the circumference of the raised seat 13 is equidistantly provided with a plurality of second threading holes 110 at the bottom. The first threading holes 19 correspond to the second threading holes 110 one by one, and the first threading holes 19 are located below the fixing holes 18. There are four groups of fixing holes 18 between every two adjacent first threading holes 19, and the wire package 4 connectors corresponding to the four groups of fixing holes 18 can pass through the corresponding first threading holes 19 and the second threading holes 110 together.

[0063] The top and bottom surfaces of the stator core 2 are provided with heat conducting rods 3, which can effectively conduct heat to the radiator 1 through the heat conducting rods 3. At the same time, the side surfaces of the stator core 2 are directly attached to the peripheral surface of the radiator 1, so that the heat of the stator core 2 is transferred to the radiator 1 through three different surfaces (top surface, bottom surface and side surface), and then the heat dissipation channel allows air flow to pass through the radiator 1 to take away the heat of the radiator 1, thereby achieving heat dissipation of the stator core 2. Compared with traditional designs, this multi-faceted heat dissipation method greatly improves the heat conduction path and efficiency, and can reduce the temperature of the stator core 2 more quickly;

[0064] Moreover, the coil 4 is not only wound on the stator core 2, but also wrapped on the heat conducting rod 3. This means that the heat generated by the coil 4 can also be effectively transferred to the radiator 1 through the heat conducting rod 3, avoiding the heat accumulation of the coil 4 locally, thereby preventing overheating damage. This design makes the heat dissipation of the coil 4 more efficient, further improving the overall heat dissipation effect;

[0065] At the same time, the heat conducting rod 3 not only conducts heat, but also serves as a connecting structure to fix the stator core 2 on the radiator 1, which avoids the use of additional connecting structures and parts. The heat conducting rod 3 and the stator core 2 are fixed together by the wire wrap 4, and no additional fasteners are required, which simplifies the overall design.

[0066] The planar design of the second rod 32 enables it to fit tightly with the surface of the stator core 2. This design directly increases the contact area for heat conduction and improves the efficiency of heat transfer from the stator core 2 to the second rod 32. In addition, the arc portion of the coil 4 wrapped around the second rod 32 also increases the contact area between the second rod 32 and the coil 4, ensuring that the heat generated by the coil 4 can be quickly conducted to the radiator 1. The first rod 31 is cylindrical, and the heat can be evenly transferred to the inner circumference and end face of the fixing hole 18. The airflow passing through the first heat dissipation channel 16 can take away the heat from the circumference of the fixing hole 18, and the airflow passing through the second heat dissipation channel 17 can take away the heat from the fixed end face. This design ensures that the heat of the stator core 2 and the coil 4 is effectively transferred through multiple paths, significantly improving the overall heat dissipation effect.

[0067] The first connection hole 11 and the second connection hole 12 provide a reasonable wiring channel for electrical connection, reducing the exposed portion of the connector of the wire package 4, thereby optimizing the internal space utilization and improving the compactness of the overall structure.

[0068] Therefore, this stator heat dissipation structure not only performs well in heat dissipation, but also simplifies the entire system through the multifunctionality of the heat conducting rod 3 (both a heat conductor and a connector), and has strong adaptability. While improving the heat dissipation efficiency of the stator core 2, it reduces the complexity of manufacturing, assembly and maintenance. It has a positive impact on the performance, cost control and reliability of the overall motor.

[0069] It should be noted that the stator heat dissipation structure of the embodiment of the present application is applicable to an outer rotor motor. In other embodiments, the fixing hole 18 can be opened on the inner circumference of the radiator 1, the stator core 2 can be installed on the inner circumference of the radiator 1, and the rotor seat can be set on the inner circumference of the stator core 2, so that the stator heat dissipation structure can also be applied to an inner rotor motor. Therefore, the stator heat dissipation structure also has the advantage of strong adaptability.

[0070] The embodiment of the present application also provides an air-cooled motor.

[0071] like Figure 5 , Figure 6 and Figure 7 The air-cooled motor includes the stator heat dissipation structure of the embodiment of the present application, and also includes a rotating shaft 5, a sealing cover 6 and a centrifugal fan 7. A bearing 51 is coaxially fixed on the rotating shaft 5. The rotating shaft 5 is inserted into the radiator 1 and is coaxial with the radiator 1. The rotating shaft 5 is multi-stage and can be assembled in sections. The radiator 1 is bolted with an annular mounting shell 52 through the first connecting hole 11. The annular mounting shell 52 is coaxially arranged with the radiator 1. An annular sealing ring 53 is clamped between the annular mounting shell 52 and the rotating shaft 5. The annular sealing ring 53 and the annular mounting shell 52 prevent air from flowing from the top of the radiator 1 into the central channel of the radiator 1, protecting the bearing 51 from being contaminated by external impurities.

[0072] The sealing cover 6 includes an annular bottom plate 61 and an annular cover body 62. The radiator 1 is bolted to the annular cover body 62 through the second connection hole 12. The annular cover body 62 covers the top and outer side of the stator core 2. The radiator 1 is bolted to the annular bottom plate 61 through the fourth connection hole 15. The annular bottom plate 61 is buckled on the annular cover body 62, and the annular bottom plate 61 covers the bottom of the stator core 2. Thus, the stator core 2 is protected and the external air is prevented from polluting the stator core 2 and affecting the service life of the motor.

[0073] The centrifugal fan 7 is located above the radiator 1 and the rotating shaft 5. The air inlet of the centrifugal fan 7 is opened on its circumference, and the air inlet is connected to the first heat dissipation channel 16 and the second heat dissipation channel 17. The centrifugal fan 7 is coaxially connected with a connecting plate 71, which is integrally formed with the centrifugal fan 7, and is bolted to the rotating shaft 5. The connecting plate 71 is also used to connect with external components.

[0074] The bottom of the centrifugal fan 7 is bolted to a connecting shell 72, which is an annular shell and is coaxially arranged with the centrifugal fan 7. A rotor 8 is installed in the connecting shell 72, and the rotor 8 is arranged around the outer periphery of the stator core 2. The bottom of the connecting shell 72 is bolted to an annular grid plate 73, which is coaxial with the radiator 1, and the bottom of the raised seat 13 extends out of the annular grid plate 73.

[0075] The raised seat 13 is bolted to the controller 9 via the third connecting hole 14, and the middle channel of the radiator 1 is connected to the inside of the controller 9, so the wire package 4 can extend into the controller 9 through the first threading hole 19 and the second threading hole 110 and connect to the internal control component.

[0076] The controller 9 includes a housing 91, a mounting base plate 92 and a plurality of silicon carbide control modules 93, wherein the plurality of silicon carbide control modules 93 are mounted on the inner top wall of the housing 91, a drive board and a control board are also mounted in the housing 91, and the housing 91 is also connected with components such as a low-voltage power connector 94, a CAN communication connector 95 and a high-voltage DC connector 96. (The drive board and the control board are not shown in the figure.)

[0077] The mounting base plate 92 is connected to the bottom of the outer shell 91 by bolts. The outer shell 91 is a combination structure of a cone and a cylinder. The cone section of the outer shell 91 is connected to the radiator 1 by bolts. The outer shell 91 is provided with a plurality of guide grooves 911 equidistantly along its periphery. The guide grooves 911 extend through the top and bottom surfaces of the outer shell 91.

[0078] This embodiment provides a structure of an outer rotor self-heating motor, in which the external component is connected to the connecting plate 71. After the controller 9 controls the corresponding coil 4 to be energized, the rotor 8 can drive the connecting shell 72 to rotate, and the connecting shell 72 drives the centrifugal fan 7 and the connecting plate 71 to rotate, thereby driving the external component. In addition, the centrifugal fan 7 can suck air into it, and the airflow passes through the first heat dissipation channel 16 and takes away the heat of the radiator 1, thereby realizing the air-cooled self-heating function of the motor.

[0079] At the same time, after the airflow is discharged from the first heat dissipation channel 16 and the second heat dissipation channel 17, it is discharged from the annular grid plate 73 and then flows along the guide groove 911. The outer surface of the housing 91 is fully in contact with the airflow, and the heat dissipation effect of the controller 9 is also improved.

[0080] At the same time, by arranging the bearing 51 and the rotating shaft 5 on the inner ring of the radiator 1, placing the controller 9 on the end of the radiator 1 away from the connecting plate 71, and providing a simple threading route through the first threading hole 19 and the second threading hole 110, the overall structure is more compact, the external occupied space is reduced, and the mechanical stability of the system is improved. Moreover, this highly integrated design can effectively shorten the manufacturing cycle and simplify the assembly process.

[0081] The motor using the stator heat dissipation structure of the present application can improve the heat dissipation performance and avoid the performance degradation of the motor due to overheating, thereby ensuring that the motor can still maintain stable output at higher power, which is beneficial to improving the performance of the motor.

[0082] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A stator heat dissipation structure, characterized in that: The invention comprises a heat sink (1) and a plurality of stator cores (2), wherein the heat sink (1) is provided with a plurality of first heat dissipation channels (16), wherein the first heat dissipation channels (16) pass through from the top of the heat sink (1) to the bottom thereof, and a plurality of fixing holes (18) are provided on the peripheral surface of the heat sink (1); The top and bottom of the stator core (2) are both provided with heat-conducting rods (3), and the stator core (2) and the heat-conducting rods (3) are jointly wound with a coil (4), that is, the stator core (2) and the heat-conducting rods (3) are fixed by the coil (4); The stator core (2) is arranged along the circumference of the heat sink (1), the heat conducting rods (3) correspond to the fixing holes (18) one by one, the heat conducting rods (3) are interference fit with the corresponding fixing holes (18), and the side of the stator core (2) facing the heat sink (1) is in contact with the heat sink (1); The heat conducting rod (3) comprises a first rod body (31) and a second rod body (32), the first rod body (31) and the second rod body (32) being integrally formed, the first rod body (31) being a cylindrical rod body, the circumference of the second rod body (32) being a combination of an arc surface and a plane surface, and the end of the second rod body (32) being embedded in the first rod body (31), the plane extension surface of the second rod body (32) being tangent to the circumference of the first rod body (31), the plane of the second rod body (32) being in contact with the stator core (2), and the coil (4) being wound on the arc surface of the second rod body (32).

2. The stator heat dissipation structure according to claim 1, characterized in that: The heat sink (1) is in the shape of a cylindrical sleeve, and a plurality of first heat dissipation channels (16) are equidistantly distributed along the circumference of the heat sink (1). The width of each of the first heat dissipation channels (16) along the direction from the outer circumference to the inner circumference of the heat sink (1) is first kept constant, then increases, and then gradually decreases. The fixing hole (18) is conical at one end that passes through the circumference of the heat sink (1); The radiator (1) is further provided with a second heat dissipation channel (17), the second heat dissipation channel (17) extending through the top surface and the bottom surface of the radiator (1), the length of the second heat dissipation channel (17) being shorter than the length of the first heat dissipation channel (16), the second heat dissipation channel (17) being arranged adjacent to the narrow section of the first heat dissipation channel (16), and the second heat dissipation channel (17) and the first heat dissipation channel (16) being arranged at intervals.

3. The stator heat dissipation structure according to claim 1, characterized in that: The stator core (2) is arranged at equal intervals around the outer peripheral surface of the heat sink (1), the fixing holes (18) penetrate to the outer peripheral surface of the heat sink (1), the side of the stator core (2) facing the heat sink (1) is an arcuate surface, and the curvature of the arcuate surface of the stator core (2) is the same as the curvature of the outer peripheral surface of the heat sink (1).

4. The stator heat dissipation structure according to claim 3, characterized in that: The outer circumference of the radiator (1) is provided with a first threading hole (19), and the inner circumference of the radiator (1) is provided with a second threading hole (110), and the connector of the wire package (4) can pass through the first threading hole (19) and the second threading hole (110) in sequence.

5. An air-cooled motor, characterized in that: The stator heat dissipation structure according to any one of claims 1 to 4 comprises a connecting shell (72) and a rotor (8), wherein the rotor (8) is installed in the connecting shell (72), the radiator (1) is provided with a sealing cover (6), wherein the sealing cover (6) covers all of the stator core (2), the rotor (8) is arranged around the outer periphery of the stator core (2), the connecting shell (72) is provided with a centrifugal fan (7), the centrifugal fan (7) is coaxially connected with a connecting plate (71), wherein the connecting plate (71) is used to connect with an external component, the connecting plate (71) is coaxially connected with a rotating shaft (5), a bearing (51) is arranged on the rotating shaft (5), the rotating shaft (5) is coaxially inserted into the radiator (1), the bearing (51) is located between the radiator (1) and the rotating shaft (5), and the end of the radiator (1) facing away from the connecting plate (71) is connected with a controller (9).

6. The air-cooled motor according to claim 5, characterized in that: The sealing cover (6) comprises an annular bottom plate (61) and an annular cover body (62); the annular bottom plate (61) is connected to the bottom of the radiator (1) and the two are coaxial; the annular cover body (62) is connected to the top of the radiator (1) and the two are coaxial; the annular cover body (62) covers the stator core (2); the annular cover body (62), the annular bottom plate (61) and the outer peripheral surface of the radiator (1) form an annular space; the stator core (2) is located in the annular space.

7. The air-cooled motor according to claim 5, characterized in that: The bottom of the connection shell (72) is bolted with an annular grid plate (73).

8. The air-cooled motor according to claim 5, characterized in that: The controller (9) comprises a shell (91), the shell (91) is connected to the heat sink (1), a plurality of silicon carbide control modules (93) are arranged on the inner top wall of the shell (91), the shell (91) is a combined structure of a cone and a cylinder, and the shell (91) is provided with a plurality of guide grooves (911) at equal intervals along its outer circumference, and the guide grooves (911) are connected to the top surface and the bottom surface of the shell (91).

9. The air-cooled motor according to claim 5, characterized in that: An annular mounting shell (52) is coaxially mounted on the top of the radiator (1), and an annular sealing ring (53) is provided between the annular mounting shell (52) and the rotating shaft (5).

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