A motor controller air-cooled heat dissipation structure

Abstract

This utility model relates to the field of motor air-cooling technology, and in particular discloses an air-cooling structure for a motor controller, including a controller housing, a heat dissipation component disposed on the controller housing, and a flow guiding component disposed on the side of the heat dissipation component. The flow guiding component includes a first flow guiding shroud disposed on one side of the heat dissipation component and a second flow guiding shroud disposed on the other side of the heat dissipation component. The first flow guiding shroud, the heat dissipation component, and the second flow guiding shroud together form a cooling channel. Cooling air flows through the first flow guiding shroud, passes through the heat dissipation component to dissipate heat from the controller, and is carried away by the heat energy through the second flow guiding shroud. By setting the first flow guiding shroud and the second flow guiding shroud on both sides of the heat dissipation component on the controller housing, the three together form a directional cooling channel, which can effectively guide the cooling air to flow precisely through the heat dissipation component.

Description

Technical Field

[0001] This utility model relates to the field of motor air cooling technology, and in particular discloses an air cooling structure for a motor controller. Background Technology

[0002] During the operation of a motor controller, its internal electronic components generate a large amount of heat. If this heat cannot be dissipated effectively and in a timely manner, it will lead to a decline in component performance, a shortened lifespan, and even malfunctions. Existing motor controller heat dissipation methods are often inadequate. Some structures have low heat dissipation efficiency and cannot quickly remove heat; some airflow guiding components are poorly designed, making it difficult to form effective cooling channels to guide airflow; and some heat dissipation components are not securely connected to the controller housing, which can easily loosen under long-term use or vibration, affecting heat dissipation. Therefore, a highly efficient and stable air-cooled heat dissipation structure is urgently needed to solve these problems. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a wind-cooled heat dissipation structure for motor controllers.

[0004] To achieve the above objectives, the present invention provides a motor controller air-cooled heat dissipation structure, including a controller housing for use with an external controller unit, a heat dissipation component disposed on the controller housing, and a flow guiding component disposed on the side of the heat dissipation component; the flow guiding component includes a first flow guiding shroud disposed on one side of the heat dissipation component, and cooling air is guided by the first flow guiding shroud through the heat dissipation component to dissipate heat from the controller unit.

[0005] The airflow guiding component also includes a second airflow guiding shroud disposed on the other side of the heat dissipation component. Cooling air is guided by the first airflow guiding shroud and flows through the heat dissipation component to dissipate heat to the controller unit and carries the heat away through the second airflow guiding shroud. Alternatively, cooling air is guided by both the first and second airflow guiding shrouds and flows through the heat dissipation component to dissipate heat to the controller unit.

[0006] By setting a first and a second air guide shroud on both sides of the heat dissipation component on the controller housing, the three together form a directional cooling channel, which can effectively guide the cooling air to flow precisely through the heat dissipation component, greatly improving the contact efficiency and heat exchange effect between the cooling air and the heat dissipation component. This quickly removes the heat generated during the operation of the controller, avoids heat accumulation in the internal units of the controller, significantly improves the heat dissipation performance and working stability of the controller, and extends its service life. At the same time, the structure is simple and compact, easy to process and assemble, low in cost, and highly applicable. In a specific implementation, the heat dissipation component is first installed in a preset position on the controller housing to ensure that the heat dissipation component is in full contact with the heat-generating elements inside the controller for efficient heat conduction. Then, the first and second air guide shrouds are installed on both sides of the heat dissipation component, with the air inlet of the first air guide shroud corresponding to the external cooling air source (such as the fan outlet), and the air outlet of the second air guide shroud facing the area that facilitates heat diffusion. This ensures that the cooling air can smoothly enter the cooling channel from the first air guide shroud, flow through the heat dissipation component to complete heat exchange, and then quickly exit from the second air guide shroud carrying heat, achieving continuous and effective air cooling for the motor controller.

[0007] The heat dissipation component includes a heat dissipation plate and multiple sets of equidistantly distributed fins on the heat dissipation plate. The heat dissipation component and the air guide cover form a cooling channel, and the length extension direction of the fins is parallel to the cooling airflow direction of the cooling channel.

[0008] By setting multiple sets of equidistant fins on the heat sink, with the fin orientation parallel to the cooling airflow direction of the cooling channel, the heat dissipation area can be significantly increased, allowing for a wider contact range between the heat dissipation components and the cooling air. On the other hand, the resistance to the cooling airflow can be effectively reduced, enabling the cooling air to flow more smoothly through the fins and fully exchange heat with them. This quickly removes the heat from the controller conducted by the heat sink, preventing heat accumulation, improving heat dissipation efficiency, and ensuring stable operation of the controller.

[0009] The flow guide includes a flow guide plate, a first extension and a second extension respectively vertically disposed on both sides of the flow guide plate, and an installation protrusion is provided on the inner side of the extension, with a first installation hole provided on the installation protrusion; the controller housing is provided with a mounting post with a threaded hole, and an external bolt passes through the first installation hole of the flow guide to lock the flow guide onto the mounting post of the controller housing.

[0010] The main structure, comprised of a guide plate and two vertically extending sections on either side, creates a regular airflow space, ensuring that cooling air flows through the heat dissipation components along a pre-defined path, preventing excessive wind resistance or airflow dispersion. Furthermore, the inner side of each extension features a mounting protrusion with a first mounting hole, which, combined with a threaded mounting post on the controller housing, secures the guide plate with external bolts threaded through the first mounting hole and onto the mounting post. This ensures a firm and precise installation, while also facilitating easy disassembly and replacement, effectively guaranteeing the sealing and stability of the cooling channel and improving overall performance. To ensure the reliability of the heat dissipation system, the specific implementation method is as follows: First, confirm the position of the mounting post and the specifications of the threaded hole on the controller housing. Then, align the mounting protrusions on the inner sides of the first and second extensions of the air guide with the mounting post, so that the first mounting hole of the mounting protrusion is coaxially aligned with the threaded hole of the mounting post. Next, take a suitable external bolt, pass it through the first mounting hole of the air guide, and screw it into the threaded hole of the mounting post. Gradually tighten the bolt until the air guide and the controller housing are tightly fitted and there is no looseness. This completes the fixed installation of the air guide, ensuring that it can cooperate with the heat dissipation components to form a closed and smooth cooling channel.

[0011] The guide plate forms a first angle with the horizontal reference plane of the heat dissipation component. This angle design allows for more precise guidance of the cooling airflow, ensuring that the cooling air contacts the heat dissipation component at the optimal angle, reducing wind resistance caused by airflow impact, and allowing the cooling air to cover the heat dissipation area more evenly, avoiding localized airflow dead zones, further improving heat exchange efficiency, and ensuring the heat dissipation stability of the cooling channel. The cooling air is blown to the heat dissipation component at a certain angle by the tilt angle of the guide plate, ensuring that the cooling air flows efficiently through the heat dissipation component along the guided path of the angle.

[0012] The first included angle is 5-10°. A first included angle of 5-10° is formed between the guide plate and the horizontal reference plane of the heat dissipation component. This 5-10° included angle design can accurately guide the cooling airflow, so that the cooling air contacts the heat dissipation component at a more suitable angle, minimize the wind resistance caused by airflow impact, avoid airflow turbulence, and allow the cooling air to evenly cover the heat dissipation area, effectively eliminate local airflow dead zones, significantly improve heat exchange efficiency, and stably ensure the heat dissipation performance of the cooling channel; too large an tilt angle will cause the cooling air to be lost.

[0013] The heat sink is provided with a second mounting hole, and the controller housing is provided with a third mounting hole that cooperates with the second mounting hole. An external bolt passes through the second mounting hole of the heat sink to lock the heat sink onto the third mounting hole of the controller housing.

[0014] The heat sink mates with the third mounting hole on the controller housing via its own second mounting hole and is secured by external bolts, ensuring precise positioning and a secure connection. This allows for a more stable fit with the internal heat-generating components of the controller, ensuring efficient heat transfer to the fins. It is also easy to install and remove, facilitating subsequent maintenance or replacement, and further enhancing the reliability and practicality of the overall cooling system.

[0015] The heat sink is made of a high thermal conductivity material. High thermal conductivity materials (such as aluminum alloys, copper alloys, etc.) have excellent heat conduction performance, which can quickly and efficiently absorb and conduct the heat generated by the heating elements inside the motor controller to the surface of the heat sink and the fins, avoiding heat accumulation near the heating elements, laying a good foundation for subsequent heat exchange between the cooling air and the fins, significantly improving heat transfer efficiency, and ensuring stable operation of the controller at a suitable temperature.

[0016] The connection between the guide plate and the extension is provided with a rounded corner transition structure.

[0017] Compared to sharp right-angle connections, rounded corner transitions effectively reduce airflow vortices generated when cooling air flows through the connection, lowering airflow resistance and allowing cooling air to flow more smoothly along the channels formed by the air guide, improving airflow efficiency to ensure heat dissipation. At the same time, it avoids the structural stress concentration problem that is prone to occur at right-angle connections, enhancing the overall stability and durability of the air guide structure. It also reduces the risk of bumps and damage caused by sharp edges during assembly and maintenance, improving operational safety.

[0018] The heat sink plate of the fins is coated with a thermally conductive silicone grease coating, which is located between the heat sink plate and the controller housing. The thermally conductive silicone grease coating is used to improve the heat conduction efficiency between the heat sink plate and the controller housing.

[0019] The thermal grease coating can effectively fill the tiny gaps on the contact surface between the heat sink and the controller housing during assembly, significantly reducing the contact thermal resistance between the two. This allows the heat absorbed by the heat sink from the motor controller to be transferred to the fins more efficiently and quickly, providing a good foundation for subsequent heat exchange between the cooling air and the fins. It also prevents heat from accumulating between the heat sink and the controller housing, significantly improving the overall heat transfer efficiency and ensuring stable operation of the controller.

[0020] The heat dissipation components are made of high thermal conductivity materials, and the thermal conductivity of the heat dissipation components is greater than that of the controller housing.

[0021] A silicone gasket is provided between the external bolt and the first mounting hole. The silicone gasket has good elasticity and sealing properties, which can tightly fill the gap between the bolt and the first mounting hole, effectively preventing cooling air from leaking from the connection, ensuring the integrity of the airflow in the cooling channel, and preventing the heat dissipation efficiency from being impaired due to air leakage. At the same time, the silicone gasket can buffer the pressure during the bolt tightening process, avoiding deformation or damage to the mounting hole caused by direct rigid contact between the bolt and the mounting hole. It can also play a role in preventing slippage and loosening by using its own friction, ensuring the long-term stable installation of components such as the air guide and reducing the risk of loosening caused by vibration and other factors.

[0022] The beneficial effects of this utility model are as follows: This utility model provides a flow guide with a specific angled guide plate on both sides of the heat dissipation component of the controller housing, which together with the heat dissipation component forms a directional cooling channel. The rounded transition between the guide plate and the extension reduces wind resistance. Combined with equidistant parallel fins and a thermally conductive silicone grease coating, the heat dissipation area is increased and the thermal resistance is reduced. At the same time, the heat dissipation plate is made of high thermal conductivity material, and the guide plate and heat dissipation plate are firmly installed with bolts and washers, so that the cooling air flows accurately and efficiently through the heat dissipation component, quickly removes heat, avoids accumulation, significantly improves heat dissipation efficiency and controller stability, extends service life, and has a simple and compact structure, low cost, and strong applicability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a cross-sectional view of the entire utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the controller housing of this utility model;

[0026] Figure 4 This is a structural schematic diagram of the controller housing of this utility model from another perspective;

[0027] Figure 5 This is a structural schematic diagram of the entire utility model from another perspective;

[0028] Figure 6 This is a schematic diagram of the heat dissipation component of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of the air guide cover of this utility model.

[0030] The reference numerals in the figures include:

[0031] 100. Controller housing; 200. Heat dissipation component; 300. Airflow guiding component; 4. First airflow guide shroud; 5. Second airflow guide shroud; 6. Cooling channel; 7. Heat dissipation plate; 220. Fin; 9. Airflow guide plate; 11. First extension; 12. Second extension; 13. Mounting protrusion; 14. First mounting hole; 110. Mounting post; 16. First included angle; 210. Second mounting hole; 120. Third mounting hole; 19. Rounded corner transition structure; 21. Silicone gasket. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0033] Please see Figures 1 to 7 As shown, the present invention discloses a motor controller air-cooled heat dissipation structure, including a controller housing 100 for use with an external controller unit, a heat dissipation component 200 disposed on the controller housing 100, and a flow guide component 300 disposed on the side of the heat dissipation component 200; the flow guide component 300 includes a first flow guide shroud 4 disposed on one side of the heat dissipation component 200, and cooling air flows through the heat dissipation component 200 to dissipate heat from the controller unit via the first flow guide shroud 4.

[0034] The airflow guiding component 300 also includes a second airflow guiding shroud 5 disposed on the other side of the heat dissipation component 200. Cooling air is guided by the first airflow guiding shroud 4 and flows through the heat dissipation component 200 to dissipate heat from the controller unit and carries the heat out through the second airflow guiding shroud 5. Alternatively, cooling air is guided by the first airflow guiding shroud 4 and the second airflow guiding shroud 5 respectively and flows through the heat dissipation component 200 to dissipate heat from the controller unit.

[0035] By setting a first air guide shroud 4 and a second air guide shroud 5 on both sides of the heat dissipation component 200 of the controller housing 100, the three together form a directional cooling channel 6, which can effectively guide the cooling air to flow precisely through the heat dissipation component 200, greatly improving the contact efficiency and heat exchange effect between the cooling air and the heat dissipation component 200, quickly removing the heat generated during the operation of the controller, avoiding heat accumulation in the internal units of the controller, significantly improving the heat dissipation performance and working stability of the controller, and extending its service life. At the same time, the structure is simple and compact, easy to process and assemble, low in cost, and highly applicable. The specific implementation method is as follows: first, heat dissipation component 200... The heat dissipation component 200 is installed in a preset position on the controller housing 100 to ensure that the heat dissipation component 200 is in full contact with the heat-generating element inside the controller to efficiently conduct heat. Then, the first air guide shroud 4 and the second air guide shroud 5 are installed on both sides of the heat dissipation component 200 respectively, so that the air inlet end of the first air guide shroud 4 corresponds to the external cooling air source (such as the fan air outlet), and the air outlet end of the second air guide shroud 5 faces the area that facilitates heat diffusion, so that the cooling air can smoothly enter the cooling channel 6 from the first air guide shroud 4, and after passing through the heat dissipation component 200 to complete the heat exchange, it carries the heat and is quickly discharged from the second air guide shroud 5 to achieve continuous and effective air cooling for the motor controller.

[0036] The heat dissipation component 200 includes a heat dissipation plate 7 and multiple sets of equidistantly distributed fins 220 disposed on the heat dissipation plate 7. The heat dissipation component 200 and the air guide cover form a cooling channel 6. The length extension direction of the fins 220 is parallel to the cooling airflow direction of the cooling channel 6.

[0037] By setting multiple sets of equidistant fins 220 on the heat sink 7, and making the fins 220 set in a direction parallel to the cooling airflow direction of the cooling channel 6, the heat dissipation area can be significantly increased, allowing the heat dissipation component 200 to have a wider contact range with the cooling air. On the other hand, the resistance of the cooling airflow can be effectively reduced, allowing the cooling air to flow more smoothly through the fins 220 and fully exchange heat with the fins 220. This quickly removes the controller heat conducted by the heat sink 7, avoids heat accumulation, effectively improves heat dissipation efficiency, and ensures stable operation of the controller.

[0038] The flow guide includes a flow guide plate 9, a first extension 11 and a second extension 12 respectively vertically disposed on both sides of the flow guide plate 9, and an installation protrusion 13 is provided on the inner side of the extension, with a first installation hole 14 provided on the installation protrusion 13; the controller housing 100 is provided with a mounting post 110 with a threaded hole, and an external bolt passes through the first installation hole 14 of the flow guide to lock the flow guide onto the mounting post 110 of the controller housing 100.

[0039] The main structure, comprised of a guide plate 9 and two vertically extending first extensions 11 and second extensions 12, forms a regular airflow space, ensuring that cooling air flows through the heat dissipation component 200 along a preset path, avoiding excessive wind resistance or airflow dispersion. Furthermore, by providing mounting protrusions 13 with first mounting holes 14 on the inner side of the extensions, and using mounting posts 110 with threaded holes on the controller housing 100, the guide plate is securely and precisely installed by external bolts threaded through the first mounting holes 14 and onto the mounting posts 110. This facilitates easy disassembly and assembly, enabling subsequent maintenance or replacement, effectively ensuring the sealing and stability of the cooling channel 6, and improving the overall heat dissipation system. To ensure reliability, the specific implementation method is as follows: First, confirm the position and thread hole specifications of the mounting post 110 on the controller housing 100. Then, align the mounting protrusions 13 on the inner side of the first extension 11 and the second extension 12 of the air guide with the mounting post 110, so that the first mounting hole 14 of the mounting protrusion 13 is coaxially aligned with the thread hole of the mounting post 110. Then, take a suitable external bolt, pass it through the first mounting hole 14 of the air guide, and screw it into the thread hole of the mounting post 110. Gradually tighten the bolt until the air guide and the controller housing 100 are tightly fitted and there is no looseness, thus completing the fixed installation of the air guide and ensuring that it can cooperate with the heat dissipation component 200 to form a closed and smooth cooling channel 6.

[0040] The guide plate 9 and the horizontal reference plane of the heat dissipation component 200 form a first angle 16. This angle design can more accurately guide the cooling airflow, allowing the cooling air to contact the heat dissipation component 200 at the optimal angle, reducing the wind resistance generated by airflow impact, and allowing the cooling air to cover the heat dissipation area more evenly, avoiding local airflow dead zones, further improving heat exchange efficiency, and ensuring the heat dissipation stability of the cooling channel 6. The cooling air is blown to the heat dissipation component 200 at a certain angle by the tilt angle of the guide plate 9, ensuring that the cooling air flows efficiently through the heat dissipation component 200 along the angled guide path.

[0041] The first included angle 16 is 5-10°. The guide plate 9 and the horizontal reference plane of the heat dissipation component 200 form a first included angle 16 of 5-10°. This 5-10° included angle design can accurately guide the cooling airflow, so that the cooling air contacts the heat dissipation component 200 at a more suitable angle, minimize the wind resistance caused by airflow impact, avoid airflow turbulence, and allow the cooling air to evenly cover the heat dissipation area, effectively eliminate local airflow dead zones, significantly improve heat exchange efficiency, and stably ensure the heat dissipation performance of the cooling channel 6; too large an tilt angle will cause the cooling air to be lost.

[0042] The heat sink 7 is provided with a second mounting hole 210, and the controller housing 100 is provided with a third mounting hole 120 that cooperates with the second mounting hole 210. External bolts pass through the second mounting hole 210 of the heat sink 7 to lock the heat sink 7 onto the third mounting hole 120 of the controller housing 100.

[0043] The heat sink 7 is fitted with the third mounting hole 120 of the controller housing 100 through its own second mounting hole 210 and locked with external bolts, so that the heat sink 7 is accurately positioned and firmly connected, and can be more stably attached to the internal heat-generating components of the controller, ensuring that heat is efficiently transferred to the fins 220. At the same time, it is easy to disassemble and assemble, which facilitates subsequent maintenance or replacement, further improving the reliability and practicality of the overall heat dissipation system.

[0044] The heat sink 7 is made of a high thermal conductivity material. High thermal conductivity materials (such as aluminum alloys, copper alloys, etc.) have excellent heat conduction performance, which can quickly and efficiently absorb and conduct the heat generated by the heating elements inside the motor controller to the surface of the heat sink 7 and the fins 220, avoiding heat accumulation near the heating elements, laying a good foundation for subsequent heat exchange between the cooling air and the fins 220, significantly improving heat transfer efficiency, and ensuring stable operation of the controller at a suitable temperature.

[0045] The connection between the guide plate 9 and the extension is provided with a rounded corner transition structure 19.

[0046] Compared to sharp right-angle connections, rounded corner transitions effectively reduce airflow vortices generated when cooling air flows through the connection, lowering airflow resistance and allowing cooling air to flow more smoothly along the channels formed by the air guide, improving airflow efficiency to ensure heat dissipation. At the same time, it avoids the structural stress concentration problem that is prone to occur at right-angle connections, enhancing the overall stability and durability of the air guide structure. It also reduces the risk of bumps and damage caused by sharp edges during assembly and maintenance, improving operational safety.

[0047] The heat sink 7 of the fin 220 is coated with a thermally conductive silicone grease coating, which is located between the heat sink 7 and the controller housing 100. The thermally conductive silicone grease coating is used to improve the heat conduction efficiency between the heat sink 7 and the controller housing 100.

[0048] The thermal grease coating can effectively fill the tiny gaps in the contact surface between the heat sink 7 and the controller housing 100 during assembly, significantly reducing the contact thermal resistance between the two. This allows the heat absorbed by the heat sink 7 from the motor controller to be transferred to the fins 220 more efficiently and quickly, providing a good foundation for subsequent heat exchange between the cooling air and the fins 220. It also prevents heat from lingering between the heat sink 7 and the controller housing 100, significantly improving the overall heat transfer efficiency and ensuring stable operation of the controller.

[0049] The heat dissipation component 200 is made of a high thermal conductivity material, and the thermal conductivity of the heat dissipation component 200 is greater than that of the controller housing 100.

[0050] A silicone washer 21 is provided between the external bolt and the first mounting hole 14. The silicone washer 21 has good elasticity and sealing properties, which can tightly fill the gap between the bolt and the first mounting hole 14, effectively preventing cooling air from leaking from the connection, ensuring the integrity of the airflow in the cooling channel 6, and preventing the heat dissipation efficiency from being damaged by air leakage; at the same time, the silicone washer 21 can buffer the pressure during the bolt tightening process, avoiding deformation or damage to the mounting hole caused by direct rigid contact between the bolt and the mounting hole, and can also play a role in anti-slip and anti-loosening by using its own friction, ensuring the long-term stable installation of components such as the air guide and reducing the risk of loosening caused by vibration and other factors.

[0051] The rest of this embodiment is the same as that in Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here.

[0052] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A wind-cooled heat dissipation structure for a motor controller, characterized in that: The controller housing (100) is used to cooperate with an external controller unit, a heat dissipation component (200) is disposed on the controller housing (100), and a flow guide component (300) is disposed on the side of the heat dissipation component (200). The flow guide component (300) includes a first flow guide shroud (4) disposed on the side of the heat dissipation component (200), and cooling air is guided by the first flow guide shroud (4) and flows through the heat dissipation component (200) to dissipate heat from the controller unit.

2. The air-cooled heat dissipation structure for a motor controller according to claim 1, characterized in that: The airflow guiding component (300) further includes a second airflow guiding shroud (5) disposed on the other side of the heat dissipation component (200). Cooling air is guided by the first airflow guiding shroud (4) and passes through the heat dissipation component (200) to dissipate heat to the controller unit and carries away the heat through the second airflow guiding shroud (5). Alternatively, cooling air is guided by the first airflow guiding shroud (4) and the second airflow guiding shroud (5) respectively and passes through the heat dissipation component (200) to dissipate heat to the controller unit.

3. The air-cooled heat dissipation structure for a motor controller according to claim 1 or 2, characterized in that: The heat dissipation component (200) includes a heat dissipation plate (7) and multiple sets of equidistant fins (220) disposed on the heat dissipation plate (7). The heat dissipation component (200) and the guide shroud form a cooling channel (6). The length extension direction of the fins (220) is parallel to the cooling airflow direction of the cooling channel (6).

4. The air-cooled heat dissipation structure for a motor controller according to claim 1, characterized in that: The flow guide includes a flow guide plate (9), a first extension (11) and a second extension (12) respectively vertically arranged on both sides of the flow guide plate (9). The inner side of the extension is also provided with a mounting protrusion (13), and the mounting protrusion (13) is provided with a first mounting hole (14). The controller housing (100) is provided with a mounting post (110) with a threaded hole. An external bolt passes through the first mounting hole (14) of the flow guide to lock the flow guide onto the mounting post (110) of the controller housing (100).

5. The air-cooled heat dissipation structure for a motor controller according to claim 4, characterized in that: The guide plate (9) and the horizontal reference plane of the heat dissipation component (200) form a first included angle (16).

6. The air-cooled heat dissipation structure for a motor controller according to claim 5, characterized in that: The first included angle (16) is 5-10°.

7. The air-cooled heat dissipation structure for a motor controller according to claim 3, characterized in that: The heat sink (7) is provided with a second mounting hole (210), and the controller housing (100) is provided with a third mounting hole (120) that cooperates with the second mounting hole (210). External bolts pass through the second mounting hole (210) of the heat sink (7) to lock the heat sink (7) onto the third mounting hole (120) of the controller housing (100).

8. The air-cooled heat dissipation structure for a motor controller according to claim 4, characterized in that: The connection between the guide plate (9) and the extension is provided with a rounded corner transition structure (19).

9. The air-cooled heat dissipation structure for a motor controller according to claim 3, characterized in that: The heat sink (7) of the fin (220) is coated with a thermally conductive silicone grease coating, which is located between the heat sink (7) and the controller housing (100). The thermally conductive silicone grease coating is used to improve the heat conduction efficiency between the heat sink (7) and the controller housing (100).

10. The air-cooled heat dissipation structure for a motor controller according to claim 1, characterized in that: The heat dissipation component (200) is made of a high thermal conductivity material, and the thermal conductivity of the heat dissipation component (200) is greater than that of the controller housing (100).

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