Electronic speed controller components, power systems and drones

Abstract

This application relates to the field of drone heat dissipation technology, and more particularly to an electronic speed controller assembly, a power system, and a drone. The electronic speed controller assembly includes: an electronic speed controller; an electronic speed controller cover, which is disposed on the upper part of the electronic speed controller and has a mounting portion; an electronic speed controller heat sink, which is installed in the mounting portion of the electronic speed controller cover and is thermally connected to the electronic speed controller; and an elastic heat insulation member, which is connected between the electronic speed controller cover and the electronic speed controller heat sink. The electronic speed controller assembly and the electronic speed controller cover provided by this application form a floating contact method through the elastic heat insulation member. The floating contact method allows for more sufficient contact and pre-compression between the electronic speed controller and the electronic speed controller heat sink, minimizing the thermal resistance at the contact interface and further improving heat exchange efficiency. At the same time, the elastic heat insulation member insulates the electronic speed controller heat sink from the electronic speed controller cover, preventing heat from the electronic speed controller cover from being transferred to the electronic speed controller heat sink, thus increasing the heat dissipation efficiency of the electronic speed controller heat sink.

Description

Technical Field

[0001] This application relates to the field of drone heat dissipation technology, and more particularly to an electronic speed controller assembly, a power system, and a drone. Background Technology

[0002] There are various layouts for the motor-electronic speed controller (ESC) power system of drones. A common layout is to mount the ESC cover and the motor in series along the axial direction. Series mounting offers advantages such as high integration, convenient maintenance, and the ability to utilize forced convection heat transfer from the propeller without the need for an additional fan. However, this series mounting presents a challenge for heat dissipation of heat-generating components in the ESC, such as MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors). In addition to the heat from the MOSFETs being transferred to the heat sink / heat radiator, heat from the motor windings (copper losses) and the stator core (iron losses) is also transferred along the stator base, mounting posts, and ESC cover to the heat sink / heat radiator. This results in a very small temperature difference between the initial temperature of the heat sink / heat radiator and the MOSFET temperature, leading to poor heat dissipation for the ESC. Summary of the Invention

[0003] This application provides an electronic speed controller assembly, a power system, and a drone. The heat dissipation structure used in the electronic speed controller assembly can reduce the contact thermal resistance between the ESC heat sink and the electronic speed controller, and the heat insulation effect between the ESC heat sink and the ESC cover is good, which can improve the heat dissipation efficiency of the electronic speed controller.

[0004] In a first aspect, this application provides an electronic speed controller assembly based on floating contact heat dissipation, the electronic speed controller assembly comprising:

[0005] Electronic speed controller;

[0006] An electronic speed controller cover is provided on the upper part of the electronic speed controller, and the electronic speed controller cover is provided with a mounting part;

[0007] An electronically controlled radiator is installed within the mounting portion of the electronic speed controller cover, and the radiator is thermally connected to the electronic speed controller; and

[0008] An elastic thermal insulation element is connected between the power control cover and the power control radiator.

[0009] In a second aspect, a power system includes a mounting base, a motor, and an electronic speed controller assembly as described in any of the first aspects, the electronic speed controller assembly being at least partially mounted within the mounting base; the motor being mounted at one end of the mounting base away from the electronic speed controller assembly.

[0010] Thirdly, this application provides a drone.

[0011] The drone includes:

[0012] body;

[0013] The arm connected to the fuselage;

[0014] The propeller mounted on the arm and the power system as described in any of the second aspects.

[0015] This application provides an electronic speed controller assembly. The electronic speed controller assembly and the ESC cover form a floating contact through an elastic heat insulation member. The floating contact allows for more sufficient contact and pre-compression between the electronic speed controller and the ESC heat sink, minimizing the thermal resistance at the contact interface and further improving heat exchange efficiency. At the same time, the elastic heat insulation member insulates the ESC heat sink from the ESC cover, preventing heat from the ESC cover from being transferred to the ESC heat sink, thus increasing the heat dissipation efficiency of the ESC heat sink for the electronic speed controller. Attached Figure Description

[0016] Figure 1 A schematic diagram of the electronic speed controller assembly provided in this application;

[0017] Figure 2 A schematic diagram of the cross-sectional structure of the elastic heat insulation component of the electronic speed controller assembly provided in this application;

[0018] Figure 3 A schematic diagram of the exploded structure of the power system provided in this application.

[0019] Figure label:

[0020] 1-Electronic speed controller; 2-Electronic speed controller cover; 21-Second protrusion; 22-Hollowed-out part; 3-Electronic speed controller heat sink; 31-Heat dissipation boss; 32-Heat dissipation fin; 33-First protrusion; 4-Elastic heat insulation component; 41-First locking groove; 42-Second locking groove; 5-Heat-conducting buffer component; 6-Mounting base; 7-Motor; 8-Electronic speed controller cover sealing ring; 9-Protective component; 10-Lighting component. Detailed Implementation

[0021] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0022] In the description of this specification, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or stated, the term "multiple" refers to two or more; the terms "connection," "fixed," etc., should be interpreted broadly, for example, "connection" can be a fixed connection or a detachable connection, or an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0023] Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0025] Figure 1 A schematic diagram of the electronic speed controller assembly provided in this application is shown below. Figure 1 As shown, this application provides an electronic speed controller 1 assembly, which includes:

[0026] Electronic speed controller 1;

[0027] The electronic speed controller cover 2 is located on the upper part of the electronic speed controller 1, and the electronic speed controller cover 2 is provided with a mounting part.

[0028] The electronic speed controller 3 is installed inside the mounting section of the electronic speed controller cover 2, and is thermally connected to the electronic speed controller 1; and

[0029] Elastic heat insulation component 4 is connected between the ESC cover 2 and the ESC heat sink 3.

[0030] In the above scheme, the electronic speed controller 1 assembly and the electronic speed controller cover 2 form a floating contact method through the elastic heat insulation component 4. The floating contact method allows for more sufficient contact and pre-compression between the electronic speed controller 1 and the electronic speed controller heat sink 3, minimizing the thermal resistance of the contact interface and further improving the heat exchange efficiency. At the same time, the elastic heat insulation component 4 insulates the electronic speed controller heat sink 3 from the electronic speed controller cover 2, preventing the heat from the electronic speed controller cover 2 from being transferred to the electronic speed controller heat sink 3, thus making the heat dissipation efficiency of the electronic speed controller 1 higher.

[0031] The drone's flight maneuvers rely on the traction of a propeller or turbofan. Motor 7 provides the power to drive the propeller or turbofan to rotate, and the speed and power of motor 7 are controlled by electronic speed controller 1. Specifically, electronic speed controller 1 can convert the DC input from the battery into AC output at a certain frequency, thereby controlling the speed and power of motor 7.

[0032] In some embodiments, the electronic speed controller 1 assembly includes an electronic speed controller cover 2, which is disposed on the upper part of the electronic speed controller 1 and is used for heat dissipation of other heat-generating components inside the UAV. In this embodiment, the electronic speed controller cover 2 is at least one of aluminum, aluminum alloy, copper, and copper alloy with high thermal conductivity. The material of the electronic speed controller cover 2 can be selected according to actual needs and is not limited here.

[0033] The ESC cover 2 is also used for the installation of the ESC heat sink 3. Specifically, the ESC cover 2 is provided with an installation part, which is a circular opening on the ESC cover 2. The ESC heat sink 3 can be installed into the ESC cover 2 along the opening.

[0034] The ESC heat sink 3 is used to dissipate heat from the ESC 1. The heat from the ESC 1 can be transferred to the ESC heat sink 3, and then dissipated by the ESC heat sink 3.

[0035] In some embodiments, the electrically adjustable heat sink 3 includes a heat sink 31 and multiple heat sink ribs 32 arranged circumferentially within the heat sink 31. The bottom of the heat sink 31 is provided with a base integrally formed with the heat sink 31, which can be used to install the heat sink 31 more stably.

[0036] Specifically, the electronic speed controller 3 is made of at least one of aluminum, aluminum alloy, copper, and copper alloy. Along the longitudinal direction of the electronic speed controller 3, the heat dissipation boss 31 is recessed to form a heat dissipation groove. Multiple heat dissipation ribs 32 are arranged circumferentially in the heat dissipation groove. The spaced heat dissipation ribs 32 can further accelerate the heat dissipation efficiency of the electronic speed controller 1. Furthermore, the heat dissipation ribs 32 arranged circumferentially are parallel to the forced convection airflow direction of the UAV's propeller or turbofan, resulting in better heat dissipation effect of the electronic speed controller 3.

[0037] Furthermore, a thermally conductive buffer 5 is provided between the electronic speed controller 1 and the electronic speed controller heat sink 3. The thermally conductive buffer 5 can be made of thermally conductive interface materials such as silicone or alumina. The thermally conductive buffer 5 can increase the thermal conductivity of the electronic speed controller 1 and the electronic speed controller heat sink 3, accelerate the heat transfer process between the electronic speed controller 1 and the electronic speed controller heat sink 3, and prevent the heat-generating components on the electronic speed controller board, such as MOSFETs, from being damaged due to the squeezing of the electronic speed controller heat sink 3 during assembly.

[0038] The ESC heat sink 3 can make deformable contact with the ESC 1 through the thermally conductive buffer 5, increasing the thermal conductivity and protecting the ESC heat sink 3. During application, when installing the ESC heat sink 3, the ESC 1 and the ESC heat sink 3 can be spaced a certain distance apart. For example, if the distance between the ESC 1 and the ESC heat sink 3 is 0.5mm: when the ESC 1 and the ESC heat sink 3 are spaced 0.5mm apart, the thickness of the thermally conductive buffer 5 on the ESC heat sink 3 can be set to 1mm. When the ESC heat sink 3 is installed into the ESC cover 2, the thermally conductive buffer 5 contacts the ESC 1 and undergoes a 0.5mm elastic deformation. At this time, the thermally conductive buffer 5 is in close contact with the ESC 1, accelerating the heat transfer process between the ESC 1 and the ESC heat sink 3.

[0039] It should be noted that the installation distance between the electronic speed controller 1 and the electronic speed controller heat sink 3, as well as the thickness of the thermally conductive buffer 5, can be selected according to actual needs and are not limited here.

[0040] Furthermore, the electronic speed controller 1 assembly also includes an elastic heat insulation component 4, which can isolate the heat from other heat-generating components (such as motor 7) inside the drone from the electronic speed controller heat sink 3. This helps to maintain the temperature difference between the electronic speed controller heat sink 3 and the electronic speed controller 1, allowing the electronic speed controller heat sink 3 to dissipate heat from the electronic speed controller 1 as much as possible and accelerating the heat dissipation process of the electronic speed controller 1.

[0041] The elastic heat insulation element 4 connects the electronic speed controller cover 2 and the electronic speed controller heat sink 3. In this embodiment, the elastic heat insulation element 4 is an annular elastic heat insulation element with an S-shaped cross-section. The S-shaped structure allows the electronic speed controller heat sink 3 to float axially and / or radially, enabling the heat sink 3 to float axially and radially relative to the electronic speed controller cover 2, thereby controlling the installation distance between the electronic speed controller 1 and the electronic speed controller heat sink 3. The elastic heat insulation element 4 can be made of at least one of elastic plastics and high-temperature resistant silicone, and the melting point of the elastic plastic or high-temperature resistant silicone is greater than 120°C.

[0042] It should be noted that different processing and assembly techniques can be used depending on the material and stiffness of the elastic heat insulation component 4. For example, when the elastic heat insulation component 4 is made of plastic, it can be manufactured using in-mold injection molding; when the elastic heat insulation component 4 is made of rubber, it can be manufactured using in-mold injection molding or manual installation. Furthermore, the elastic heat insulation component 4 can also be other shaped structures, such as arc-shaped or straight-lined. The molding method and shape of the elastic heat insulation component 4 can be selected according to actual needs, and are not limited here.

[0043] Figure 2 A schematic cross-sectional view of the elastic heat insulation member 4 of the electronic speed controller 1 assembly provided in this application is shown below. Figure 2As shown, to improve the connection stability between the elastic heat insulation component 4 and the electrically adjustable cover 2 and the electrically adjustable heat sink 3, the elastic heat insulation component 4 is provided with a first engaging groove 41 and a second engaging groove 42 on both sides. Correspondingly, the electrically adjustable heat sink 3 is provided with a first protrusion 33 along the radial direction of the heat dissipation protrusion 31, and the mounting part of the electrically adjustable cover 2 is provided with a second protrusion 21; the first protrusion 33 can engage with the first engaging groove 41, and the second protrusion 21 can engage with the second engaging groove 42. Through the cooperation of the first protrusion 33 with the first engaging groove 41 and the second protrusion 21 with the second engaging groove 42, the electrically adjustable cover 2, the elastic heat insulation component 4 and the electrically adjustable heat sink 3 can be stably connected.

[0044] In practical applications, the electronic speed controller 1 is installed into the electronic speed controller 2 along the mounting part of the electronic speed controller 2 and connected to the electronic speed controller 2 through the elastic heat insulation member 4. At this time, the first protrusion 33 cooperates with the first engaging groove 41 and the second protrusion 21 cooperates with the second engaging groove 42. The heat-conducting buffer member 5 on the electronic speed controller heat sink 3 comes into contact with the electronic speed controller 1 during deformation, and the heat of the electronic speed controller 1 is transferred to the electronic speed controller heat sink 3 through the heat-conducting buffer member 5.

[0045] Figure 3 The exploded structure diagram of the power system provided in this application is as follows: Figure 3 As shown, the electronic speed controller 1 assembly consists of the electronic speed controller cover 2, the elastic heat insulation component 4, the electronic speed controller radiator 3, the electronic speed controller 1, and the heat-conducting buffer component 5. The electronic speed controller 1 assembly, together with the mounting base 6 and the motor 7, forms the power system of the UAV. The power system can provide traction for the UAV.

[0046] In some embodiments, the mounting base 6 is a columnar structure with a receiving cavity, serving as the mounting structure for the electronic speed controller 1 assembly and the motor 7. The electronic speed controller assembly is at least partially installed within the receiving cavity. Specifically, the electronic speed controller cover 2 of the electronic speed controller assembly has multiple first mounting holes, and multiple mounting posts are provided longitudinally on the side wall of the receiving cavity. The mounting posts and the first mounting holes can be connected by fasteners such as screws. Through the connection between the first mounting holes and the mounting posts, the electronic speed controller cover 2 can be stably installed on the mounting base 6.

[0047] Furthermore, the power system also includes an electronic control cover sealing ring 8, which is disposed between the electronic control cover 2 and the mounting base 6, serving to prevent water and dust. Specifically, the electronic control cover 2 has a sealing groove, which is an annular groove on the side of the electronic control cover 2 near the mounting base 6. The electronic control cover sealing ring 8 is installed in the sealing groove, and after the electronic control cover 2 and the mounting base 6 are connected, the electronic control cover sealing ring 8 performs a sealing function. The electronic control cover sealing ring 8 used in this embodiment can be made of plastic or silicone. In addition to using the electronic control cover sealing ring 8, sealant or other methods can also be used to seal the electronic control cover 2 and the mounting base 6. Of course, other sealing methods can also be used, and can be selected according to actual needs, without limitation here.

[0048] Furthermore, the electronic speed controller 1 is provided with multiple second mounting holes, and the receiving cavity is provided with multiple mounting positions corresponding to the second mounting holes. The second mounting holes and mounting positions can be connected by fasteners such as screws, making the electronic speed controller 1 more stable to install and facilitating the deformation contact between the electronic speed controller heat sink 3 and the electronic speed controller 1.

[0049] In some embodiments, the motor 7 is mounted on the mounting base 6 at the end furthest from the electronic speed controller 1 assembly using fasteners such as screws, and provides driving force for the UAV. The motor 7 includes a motor winding, a stator core, a stator housing, and other structures. The motor winding surrounds the stator core, and the stator housing covers the stator core and the motor winding, contacting the stator core. During operation, the winding and stator core generate heat. This heat can be transferred to the ESC cover 2 along the stator housing and the mounting posts within the housing cavity, where it is dissipated. The end of the motor 7 furthest from the mounting base 6 is connected to a propeller or turbofan, providing driving force for the propeller or turbofan.

[0050] Furthermore, in order to protect the safety of the wiring between the motor 7 and the mounting base 6, a protective component 9 is provided between the motor 7 and the mounting base 6. The protective component 9 serves to prevent dust and water damage and to protect the insulation layer of the power line between the motor 7 and the mounting base 6.

[0051] During the use of the drone, the power system also includes an illumination component 10, which consists of a lamp and a light guide column, and plays a role in identifying the drone's heading. Specifically, the electronic speed control cover 2 also has a cutout 22, which is a mounting position formed by the extension of the electronic speed control cover 2 along the mounting base 6. The illumination component 10, consisting of a lamp and a light guide column, is fixed to the electronic speed control cover 2 by screws or other fasteners.

[0052] In practical applications, the electronic speed controller 1 is installed into the electronic speed controller 2 along the mounting part of the electronic speed controller 2 and connected to the electronic speed controller 2 through the elastic heat insulation member 4. At this time, the cooperation between the first protrusion 33 and the first engaging groove 41 and the cooperation between the second protrusion 21 and the second engaging groove 42 allows the electronic speed controller heat sink 3 to float axially and radially relative to the electronic speed controller 2, thereby controlling the installation distance between the electronic speed controller 1 and the electronic speed controller heat sink 3. Further, the electronic speed controller 1 is installed, and the thermally conductive buffer member 5 on the electronic speed controller heat sink 3 comes into contact with the deformation of the electronic speed controller 1. The heat of the electronic speed controller 1 is transferred to the electronic speed controller heat sink 3 through the thermally conductive buffer member 5 for heat dissipation.

[0053] The heat generated by the motor 7 winding and stator core can be transferred to the ESC cover 2 along the stator base and the mounting columns in the housing cavity, and the ESC cover 2 will carry out the heat dissipation process.

[0054] The ESC heat sink 3 is separated from the ESC cover 2 by the elastic heat insulation component 4, so that the ESC heat sink 3 only dissipates heat from the electronic speed controller 1, while the ESC cover 2 dissipates heat from heat-generating components such as the motor 7. The heat from the ESC cover 2 will not be transferred to the ESC heat sink 3, and the ESC heat sink 3 has a higher heat dissipation efficiency for the electronic speed controller 1.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electronic speed controller (1) assembly based on floating contact heat dissipation, characterized in that, The electronic speed controller (1) assembly includes: Electronic speed controller (1); Electronic speed controller cover (2), which covers the upper part of the electronic speed controller (1), and the electronic speed controller cover (2) is provided with a mounting part; An electronically controlled heat sink (3) is installed inside the mounting portion of the electronically controlled cover (2), and the electronically controlled heat sink (3) is thermally connected to the electronic speed controller (1); and An elastic heat insulation element (4) is connected between the electric control cover (2) and the electric control heat sink (3), and allows the electric control heat sink (3) to float axially and / or radially, so that the electric control heat sink (3) floats axially and radially relative to the electric control cover (2).

2. The electronic speed controller (1) assembly according to claim 1, characterized in that, The electronic speed controller (1) assembly also includes a thermally conductive buffer (5); The thermally conductive buffer (5) is disposed between the electronically controlled heat sink (3) and the electronic speed controller (1).

3. The electronic speed controller (1) assembly according to claim 1, characterized in that, The elastic heat insulation element (4) is an annular elastic heat insulation element, and the elastic heat insulation element (4) is made of any one of plastic, rubber, and high temperature resistant silicone.

4. The electronic speed controller (1) assembly according to claim 1, characterized in that, The electrically adjustable heat sink (3) includes a heat dissipation boss (31) and multiple heat dissipation ribs (32) arranged circumferentially within the heat dissipation boss (31).

5. The electronic speed controller (1) assembly according to claim 1, characterized in that, The electrically adjustable heat sink (3) is made of any one of aluminum, aluminum alloy, copper, or copper alloy.

6. The electronic speed controller (1) assembly according to claim 1, characterized in that, The electrically adjustable cover (2) is made of any one of aluminum, aluminum alloy, copper, or copper alloy.

7. The electronic speed controller (1) assembly according to claim 1, characterized in that, The outer side of the electrically adjustable heat sink (3) is provided with a first protrusion (33) along the circumferential direction, and the inner side of the electrically adjustable cover (2) is provided with a second protrusion (21) along the circumferential direction. The elastic heat insulation component (4) has a first engaging groove (41) and a second engaging groove (42) on both sides respectively. The first protrusion (33) engages with the first engaging groove (41), and the second protrusion (21) engages with the second engaging groove (42).

8. A power system, characterized in that, The power system includes a mounting base (6), a motor (7), and an electronic speed controller (1) assembly as described in any one of claims 1 to 7, wherein the electronic speed controller (1) assembly is at least partially mounted in the mounting base (6); and the motor (7) is mounted at one end of the mounting base (6) away from the electronic speed controller (1) assembly.

9. The power system according to claim 8, characterized in that, The power system also includes an electronically adjustable cover sealing ring (8); The power switch cover (2) is provided with a sealing groove, and the power switch cover sealing ring (8) is installed in the sealing groove.

10. The power system according to claim 8, characterized in that, The power system also includes lighting components (10); The power switch cover (2) has a hollowed-out portion (22), and the lighting element (10) is installed inside the hollowed-out portion (22).

11. A drone, characterized in that, The drone includes: a fuselage; The arm connected to the fuselage; The propeller mounted on the arm and the power system as described in any one of claims 8 to 10.

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