Driving device and controller thereof

Abstract

The utility model discloses a driving device and a controller thereof. The driving device comprises a motor and the controller. The motor includes a housing formed with a cooling flow path for conveying a cooling fluid. The controller is arranged at one end of the machine shell, electrically connected to the motor and comprises a bearing shell and a control circuit board assembly. The bearing shell is connected to the machine shell and bears the control circuit board assembly, the bearing shell is provided with a heat dissipation flow channel which is communicated with the cooling flow channel and used for conveying the cooling fluid to the cooling flow channel, and the heat dissipation flow channel corresponds to the control circuit board assembly in position. And the cooling fluid conveyed by the heat dissipation flow channel is used for dissipating heat of the control circuit board assembly. Therefore, the number of components of the driving device can be reduced, the size of the driving device can be miniaturized, the weight and the manufacturing cost can be reduced, and the space required for installation can be reduced.

Description

Technical Field

[0001] The utility model relates to a driving device, in particular to a driving device integrating a motor and a controller and a controller thereof. Background Art

[0002] The motor and controller currently used in vehicles such as electric vehicles are each independent modules, so the two are separated from each other and installed at intervals inside the vehicle. However, this installation method requires a large installation space, so it is cumbersome and inconvenient to install the motor and the controller in the limited space inside the vehicle. In addition, the motor and the controller need to be cooled and dissipated by two heat dissipation structures respectively. The heat dissipation structure has many components and a complex structure, which increases the manufacturing cost. Furthermore, the motor and the controller need to be electrically connected through a plurality of relatively long and exposed wires, which makes the wires costly and easily affected by other components inside the vehicle, causing inconvenience in assembly. Utility Model Content

[0003] Therefore, one object of the present invention is to provide a driving device that can overcome at least one disadvantage of the background art.

[0004] The purpose of the utility model and the background technical problem to be solved are achieved by adopting the following technical scheme. According to the driving device proposed in the utility model, it includes a motor and a controller. The motor includes a casing, and the casing forms a cooling flow path for conveying a cooling fluid. The controller is arranged at one end of the casing and is electrically connected to the motor and includes a carrying shell, and a control circuit board assembly. The carrying shell is connected to the casing and carries the control circuit board assembly. The carrying shell forms a heat dissipation channel connected to the cooling flow path for conveying the cooling fluid to the cooling flow path. The heat dissipation channel corresponds to the position of the control circuit board assembly, and the cooling fluid conveyed by the heat dissipation channel is used to dissipate heat for the control circuit board assembly.

[0005] In the driving device of the utility model, the heat dissipation channel is an open heat dissipation channel, the control circuit board assembly closes the heat dissipation channel and can contact the cooling fluid flowing in the heat dissipation channel.

[0006] In the driving device of the utility model, the heat dissipation channel is in a continuously curved shape.

[0007] In the drive device of the utility model, the heat dissipation channel has a curved groove, and an inlet hole and an outlet hole respectively connected to the opposite ends of the curved groove, the curved groove is in an open continuous curved shape, the outlet hole is connected to the cooling flow path, and the control circuit board assembly closes the curved groove and can contact the cooling fluid flowing in the curved groove.

[0008] The driving device of the utility model, the carrying shell has a carrying platform for carrying the control circuit board assembly and forming the heat dissipation flow channel, the carrying platform has a wall body and a boss body, the wall body has a wall surface facing the casing, the boss body is protruding on the side of the wall body opposite to the wall surface, the boss body has a table surface opposite to the wall surface and carrying the control circuit board assembly, the table surface is recessed to form the curved groove, and the wall surface is recessed to form the inlet hole and the outlet hole.

[0009] In the driving device of the utility model, the carrying shell is further formed with a through hole, and the controller further comprises a plurality of wires, which are passed through the through hole and are electrically connected between the motor and the control circuit board assembly.

[0010] The driving device of the utility model comprises a cooling flow path having a branch channel, two cooling flow channels connected to the branch channel, and a confluence channel connected to the cooling flow channel at one end opposite to the branch channel. The branch channel is connected to the heat dissipation channel to transport the cooling fluid and divert it to the cooling flow channel. The cooling flow channel is used to transport the cooling fluid flow, and the confluence channel is used to converge the cooling fluid output by the cooling flow channel.

[0011] The drive device of the utility model is characterized in that the casing is a hollow cylinder, the diverter channel has a diverter section which is V-shaped and connected to the heat dissipation channel, and two conveying sections which are respectively connected to the diverter sections and are spaced apart from each other, the confluence channel and the diverter channel are arranged spaced apart along the circumferential direction of the casing, the cooling channels are arranged spaced apart along the circumferential direction, and each of the cooling channels is continuously curved and connected between the corresponding conveying section and the confluence channel.

[0012] The driving device of the utility model, each of the cooling flow channels has a plurality of first turning sections arranged at intervals along the circumferential direction and away from the controller, a second turning section located between the corresponding conveying section and the confluence channel and adjacent to the controller, a first connecting section connected between the corresponding conveying section and the corresponding first turning section, a second connecting section connected between the corresponding first turning section and the second turning section, a third connecting section connected between the second turning section and the corresponding first turning section, and a fourth connecting section connected between the corresponding first turning section and the confluence channel, the first connecting section, the second connecting section, the third connecting section and the fourth connecting section are arranged at intervals along the circumferential direction.

[0013] The drive device of the utility model, the casing includes a sleeve shell, and a first end shell and a second end shell respectively connected to opposite ends of the sleeve shell, the sleeve shell forms the first connecting section, the second connecting section, the third connecting section and the fourth connecting section of each cooling flow channel, the first end shell forms the first turning section of each cooling flow channel, the second end shell is connected to the controller and forms the branch channels arranged at intervals along the circumferential direction, the second turning section of each cooling flow channel, and the confluence channel.

[0014] Another object of the present invention is to provide a controller for a driving device that can overcome at least one disadvantage of the background art.

[0015] The purpose of the present invention and the background technical problem to be solved are achieved by adopting the following technical scheme. The controller of the driving device proposed in the present invention includes a carrying shell and a control circuit board assembly. The carrying shell is formed with a heat dissipation channel for conveying a cooling fluid. The control circuit board assembly is arranged on the carrying shell and corresponds to the position of the heat dissipation channel. The cooling fluid conveyed by the heat dissipation channel is used to dissipate heat for the control circuit board assembly.

[0016] The beneficial effect of the utility model is that by integrating the motor and the controller into one, the number of components of the drive device can be reduced, so that the volume of the drive device can be miniaturized, thereby reducing the weight and manufacturing cost, and reducing the space required for installation. In addition, the heat dissipation channel of the controller and the cooling channel of the motor can be integrated together to form a single heat dissipation structure, so that the heat dissipation structure can play a role in cooling and dissipating the controller and the motor. Thereby, the structural complexity and manufacturing cost of the drive device can be reduced. Furthermore, by passing the wire through the through hole and electrically connected between the stator of the motor and the control circuit board assembly, the length of the wire is short to reduce costs, and the wire will not be exposed from the drive device and affected by other components inside the vehicle to facilitate assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of an embodiment of the driving device of the utility model;

[0018] Figure 2 is a top view of the embodiment;

[0019] Figure 3 is a bottom view of the embodiment;

[0020] Figure 4 is along Figure 2 A cross-sectional view taken along the IV-IV line in FIG.

[0021] Figure 5 is along Figure 2 A cross-sectional view taken along the V-V line in FIG.

[0022] Figure 6 is a perspective exploded view of the embodiment, illustrating the assembly relationship between a motor and a controller;

[0023] Figure 7 is a three-dimensional exploded view of the embodiment viewed from another viewing angle;

[0024] Figure 8 is a three-dimensional exploded view of the controller of the embodiment, illustrating the assembly relationship between a carrier shell, a control circuit board assembly and an end cover;

[0025] Fig. 9 is an incomplete side view of the embodiment, in which the control circuit board assembly and the end cover are omitted; and

[0026] Fig.10 It is an incomplete side view of the embodiment, in which the end cover is omitted. DETAILED DESCRIPTION

[0027] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0028] Before the present invention is described in detail, it should be noted that similar elements are represented by the same reference numerals in the following description.

[0029] See also Figure 1 An embodiment of the driving device 100 of the utility model is applied to a vehicle such as an electric vehicle. The driving device 100 includes a motor 1 and a controller 2 disposed at one end of the motor 1 .

[0030] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 , the motor 1 is taken as an example of an induction motor. The motor 1 includes a housing 10, a first bearing 11, a second bearing 12, a rotating shaft 13, a stator 14, and a rotor 15. The housing 10 is a hollow cylinder and forms a cooling flow path 101 for conveying a cooling fluid. The cooling flow path 101 has a branch channel 102, two cooling channels 103 connected to the branch channel 102, and a confluence channel 104 connected to the cooling channel 103 at one end opposite to the branch channel 102. The branch channel 102 is used to convey and divert the cooling fluid to the cooling channel 103. The cooling channel 103 is used to convey the cooling fluid to flow. The confluence channel 104 is used to converge the cooling fluid output by the cooling channel 103. In this embodiment, the cooling fluid is cooling water as an example but not limited thereto, and the cooling fluid may also be other forms of coolant. The first bearing 11 and the second bearing 12 are disposed in the housing 10 and are respectively adjacent to opposite ends of the housing 10. The rotating shaft 13 is disposed through the housing 10, the first bearing 11 and the second bearing 12. A portion of the rotating shaft 13 protrudes out of one end of the housing 10. The stator 14 is disposed in the housing 10 and surrounds the outer periphery of the rotating shaft 13. The rotor 15 is disposed in the housing 10 and is sleeved on the rotating shaft 13 and surrounded by the stator 14. The rotor 15 can be driven to rotate by the magnetic field generated by the stator 14, so that the rotor 15 can drive the rotating shaft 13 to rotate.

[0031] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7The flow channel 102 has a V-shaped flow channel section 105 and two conveying sections 106 respectively connected to the flow channel section 105 and spaced from each other. The confluence channel 104 and the flow channel 102 are spaced apart from each other along a circumferential direction D of the housing 10. The cooling channels 103 are spaced apart from each other along the circumferential direction D. Each cooling channel 103 is continuously curved and connected between the corresponding conveying section 106 and the confluence channel 104. Each of the cooling channels 103 has a plurality of first turning sections 107 arranged at intervals along the circumferential direction D and away from the controller 2, a second turning section 108 located between the corresponding conveying section 106 and the confluence channel 104 and adjacent to the controller 2, a first connecting section 109 connected between the corresponding conveying section 106 and the corresponding first turning section 107, a second connecting section 110 connected between the corresponding first turning section 107 and the second turning section 108, a third connecting section 111 connected between the second turning section 108 and the corresponding first turning section 107, and a fourth connecting section 112 connected between the corresponding first turning section 107 and the confluence channel 104. The first connecting section 109, the second connecting section 110, the third connecting section 111 and the fourth connecting section 112 are arranged at intervals along the circumferential direction D.

[0032] Specifically, the housing 10 includes a housing 16, a first end housing 17, a second end housing 18, an inlet joint 19, and an outlet joint 20. The housing 16 is hollow and cylindrical and is formed with the first connecting section 109, the second connecting section 110, the third connecting section 111, and the fourth connecting section 112 of each cooling channel 103. The first end housing 17 and the second end housing 18 are respectively connected to the opposite ends of the housing 16. The first end housing 17 is formed with the first turning section 107 of each cooling channel 103. The first end housing 17 is provided for the rotation shaft 13 to pass through and for the first bearing 11 to be set. The second end housing 18 is connected to the controller 2 and is formed with the branch channel 102 arranged at intervals along the circumferential direction D, the second turning section 108 of each cooling channel 103, and the converging channel 104.

[0033] See also Figure 3 and Figure 6 The second end shell 18 is formed with an L-shaped guide hole 181. The inlet joint 19 is inserted into the guide hole 181 and is used to connect an input pipe (not shown). The input pipe is used to input the cooling fluid into the inlet joint 19. The outlet joint 20 is connected to the second end shell 18 and communicated with the confluence channel 104. The outlet joint 20 is used to connect an output pipe (not shown).

[0034] See also Figure 4 , Figure 5 , Figure 7 , Figure 8 and Fig. 9 , the controller 2 is electrically connected to the motor 1 and includes a bearing shell 21, a control circuit board assembly 23, an end cover 24, a plurality of wires 25, and a plurality of power lines 26. The bearing shell 21 is connected to the end of the second end shell 18 of the housing 10 opposite to the sleeve shell 16. The bearing shell 21 has a bearing platform 211 for bearing the control circuit board assembly 23. The bearing platform 211 is formed with a heat dissipation channel 212. The heat dissipation channel 212 is connected between the shunt section 105 of the shunt channel 102 of the cooling flow path 101 and the guide hole 181 and corresponds to the position of the control circuit board assembly 23. The heat dissipation channel 212 is used to transport the cooling fluid input from the inlet joint 19 to the guide hole 181 to the shunt section 105 of the shunt channel 102. The cooling fluid transported by the heat dissipation channel 212 is used to dissipate heat for the control circuit board assembly 23.

[0035] In this embodiment, the heat dissipation channel 212 is an open heat dissipation channel. The control circuit board assembly 23 closes the heat dissipation channel 212 and can contact the cooling fluid flowing in the heat dissipation channel 212. Thereby, the cooling fluid can directly contact the control circuit board assembly 23 and perform heat exchange with the control circuit board assembly 23 during the process of flowing in the heat dissipation channel 212. The control circuit board assembly 23 and the support platform 211 are bonded together by a waterproof sealant, and the waterproof sealant surrounds the outer periphery of the heat dissipation channel 212 to prevent the cooling fluid from leaking out of the heat dissipation channel 212. Furthermore, the heat dissipation channel 212 is in a continuously curved shape, thereby increasing the length of the heat dissipation channel 212, and further increasing the area of ​​contact between the cooling fluid and the control circuit board assembly 23 during the flow of the heat dissipation channel 212.

[0036] More specifically, the support platform 211 has a wall body 213 and a boss body 214. The wall body 213 has a wall surface 215 facing the second end shell 18. The boss body 214 is protruding on the side of the wall body 213 opposite to the wall surface 215. The boss body 214 has a table surface 216 opposite to the wall surface 215. The heat dissipation channel 212 has a curved groove 217 that is recessed by the table surface 216 and is in an open and continuously curved shape, and an inlet hole 218 and an outlet hole 219 that are recessed by the wall surface 215 and are respectively connected to the opposite ends of the curved groove 217. The table surface 216 carries the control circuit board assembly 23 and the control circuit board assembly 23 closes the curved groove 217. The inlet hole 218 and the outlet hole 219 are respectively connected to the guide hole 181 and the diversion section 105.

[0037] The carrying shell 21 also has a surrounding wall 220 connected to the outer periphery of the wall body 213 of the carrying platform 211. The surrounding wall 220 surrounds the boss body 214 and the control circuit board assembly 23. The end cover 24 is fixedly connected to the surrounding wall 220 of the carrying shell 21 to close the carrying shell 21. The wall body 213 of the carrying shell 21 is formed with a through hole 221 and a plurality of through holes 222. The wire 25 is passed through the through hole 221 and is electrically connected between the stator 14 of the motor 1 and the control circuit board assembly 23. The power lines 26 are respectively passed through the through holes 222 and are electrically connected to the control circuit board assembly 23.

[0038] See also Figure 4 , the driving device 100 further includes a magnetic encoder 3. The magnetic encoder 3 includes a magnet 31, a circuit board 32, and a Hall effect sensor 33. The magnet 31 is disposed at one end of the rotating shaft 13 adjacent to the controller 2. The circuit board 32 is disposed at the second end housing 18 of the housing 10 and is located between the magnet 31 and the controller 2. The Hall effect sensor 33 is disposed on the circuit board 32 and faces the magnet 31. The Hall effect sensor 33 is used to sense the magnetic field change of the magnet 31 so that the circuit board 32 can feedback the speed information of the rotating shaft 13 of the motor 1.

[0039] The following is a detailed description of the manner in which the cooling fluid dissipates heat for the motor 1 and the controller 2 of the driving device 100:

[0040] See also Figure 4 , Figure 6 , Figure 7 , Fig. 9 and Fig.10First, the input pipe inputs the cooling fluid into the inlet joint 19, so that the cooling fluid can flow into the inlet hole 218 of the heat dissipation channel 212 through the inlet joint 19 and the guide hole 181. Then, the cooling fluid flows into the curved groove 217 through the inlet hole 218. When the cooling fluid flows in the curved groove 217 of the heat dissipation channel 212, it contacts the control circuit board assembly 23 and performs heat exchange with the control circuit board assembly 23, so that the cooling fluid absorbs the heat generated by the control circuit board assembly 23 during operation to dissipate the heat of the control circuit board assembly 23. Afterwards, the cooling fluid is discharged from the curved groove 217 and flows into the diversion section 105 of the diversion channel 102 through the outlet hole 219.

[0041] By designing the curved groove 217 of the heat dissipation channel 212 in an open manner, the cooling fluid can directly contact the control circuit board assembly 23 to dissipate heat during the process of flowing in the curved groove 217, thereby greatly improving the heat dissipation effect of the control circuit board assembly 23. In addition, by designing the curved groove 217 of the heat dissipation channel 212 in a continuously curved shape, the length of the curved groove 217 and the area of ​​contact between the cooling fluid and the control circuit board assembly 23 during the flow process can be increased, thereby further improving the heat dissipation effect of the control circuit board assembly 23.

[0042] See also Figures 2 to 7, the cooling fluid is divided by the diversion section 105, so that the cooling fluid is divided into two halves and flows into the conveying section 106 respectively. The conveying section 106 conveys the cooling fluid to the first connecting section 109 of the cooling channel 103 respectively. Each of the first connecting sections 109 guides the cooling fluid to flow into the corresponding first turning section 107. When the cooling fluid flows in the corresponding first turning section 107, it will be guided by the first turning section 107 to flow along the circumferential direction D, so that the cooling fluid can flow into the second connecting section 110. The second connecting section 110 guides the cooling fluid to flow back into the second turning section 108. When the cooling fluid flows in the second turning section 108, it will be guided by the second turning section 108 to flow along the circumferential direction D, so that the cooling fluid can flow into the third connecting section 111. The third connecting section 111 guides the cooling fluid to flow into the corresponding first turning section 107. The cooling fluid will be guided by the first turning section 107 to flow along the circumferential direction D during the flow in the corresponding first turning section 107, so that the cooling fluid can flow into the fourth connecting section 112. The fourth connecting section 112 will guide the cooling fluid to flow back into the confluence channel 104. The confluence channel 104 will converge the cooling fluid outputted by the fourth connecting section 112 of the cooling channel 103 and flow into the outlet joint 20 and flow into the output pipe through the outlet joint 20 for discharge. In this way, a heat dissipation cycle is completed. The cooling fluid will continuously repeat the aforementioned heat dissipation cycle during the operation of the drive device 100.

[0043] The heat generated by the motor 1 during operation is conducted to the cooling fluid in the cooling channel 103 of the cooling channel 101 through the housing 10, thereby allowing the cooling fluid transported by the cooling channel 103 of the cooling channel 101 to dissipate heat for the motor 1. By designing the cooling channel 103 of the cooling channel 101, the path length and flow time of the cooling fluid flowing in each cooling channel 103 can be shortened, allowing the cooling fluid to dissipate heat for the motor 1 more quickly to improve heat dissipation efficiency.

[0044] It should be noted that, in this embodiment, the curved groove 217 of the heat dissipation channel 212 of the controller 2 may also be designed to be non-open as required, and is not limited to the open.

[0045] To summarize the above, the drive device 100 of this embodiment can reduce the number of components of the drive device 100 by integrating the motor 1 and the controller 2 into one, so that the volume of the drive device 100 can be miniaturized, thereby reducing the weight and manufacturing cost, and reducing the space required for installation. Therefore, the drive device 100 can be easily assembled in the limited space inside the vehicle without affecting the performance and endurance of the vehicle. In addition, the heat dissipation channel 212 of the controller 2 and the cooling channel 101 of the motor 1 can be integrated together to form a single heat dissipation structure, so that the heat dissipation structure can play a role in cooling and dissipating the controller 2 and the motor 1. Thereby, the structural complexity and manufacturing cost of the drive device 100 can be reduced. Since the heat resistance of the motor 1 is higher than that of the control circuit board assembly 23, the cooling fluid first dissipates the heat of the control circuit board assembly 23 through the heat dissipation channel 212 and then dissipates the heat of the motor 1 through the cooling channel 101, so that the control circuit board assembly 23 can be dissipated more effectively to ensure that the operating temperature of the control circuit board assembly 23 can be maintained within the required temperature range. Furthermore, by the way that the wire 25 is passed through the through hole 221 and electrically connected between the stator 14 of the motor 1 and the control circuit board assembly 23, the length of the wire 25 is short to reduce costs, and the wire 25 will not be exposed to the drive device 100 and affected by other components inside the vehicle to facilitate assembly, which can indeed achieve the purpose of the utility model.

Claims

1. A driving device, characterized in that: The driving device includes a motor and a controller. The motor includes a casing, and the casing forms a cooling flow path for conveying a cooling fluid. The controller is arranged at one end of the casing and is electrically connected to the motor and includes a carrying shell, and a control circuit board assembly. The carrying shell is connected to the casing and carries the control circuit board assembly. The carrying shell forms a heat dissipation channel connected to the cooling flow path for conveying the cooling fluid to the cooling flow path. The heat dissipation channel corresponds to the position of the control circuit board assembly, and the cooling fluid conveyed by the heat dissipation channel is used to dissipate heat for the control circuit board assembly.

2. The driving device according to claim 1, characterized in that: The heat dissipation channel is an open heat dissipation channel, and the control circuit board assembly closes the heat dissipation channel and can contact the cooling fluid flowing in the heat dissipation channel.

3. The driving device according to claim 1, characterized in that: The heat dissipation channel is in a continuously curved shape.

4. The driving device according to claim 1, characterized in that: The heat dissipation channel has a curved groove, and an inlet hole and an outlet hole respectively connected to the opposite ends of the curved groove. The curved groove is open and continuously curved. The outlet hole is connected to the cooling flow path. The control circuit board assembly closes the curved groove and can contact the cooling fluid flowing in the curved groove.

5. The driving device according to claim 4, characterized in that: The carrying shell has a carrying platform for carrying the control circuit board assembly and forming the heat dissipation channel, the carrying platform has a wall body and a boss body, the wall body has a wall surface facing the casing, the boss body is protruding on the side of the wall body opposite to the wall surface, the boss body has a table surface opposite to the wall surface and carrying the control circuit board assembly, the table surface is recessed to form the curved groove, and the wall surface is recessed to form the inlet hole and the outlet hole.

6. The driving device according to claim 1, characterized in that: The carrying shell is further formed with a through hole, and the controller further comprises a plurality of wires, which are passed through the through hole and are electrically connected between the motor and the control circuit board assembly.

7. The driving device according to any one of claims 1 to 6, characterized in that: The cooling flow path has a branch channel, two cooling channels connected to the branch channel, and a confluence channel connected to the cooling channel at one end opposite to the branch channel. The branch channel is connected to the heat dissipation channel to transport and divert the cooling fluid to the cooling channel. The cooling channel is used to transport the cooling fluid flow, and the confluence channel is used to converge the cooling fluid output by the cooling channel.

8. The driving device according to claim 7, characterized in that: The housing is a hollow cylinder, the diverter channel has a V-shaped diverter section connected to the heat dissipation channel, and two conveying sections respectively connected to the diverter sections and spaced apart from each other, the confluence channel and the diverter channel are arranged spaced apart along the circumferential direction of the housing, the cooling channels are arranged spaced apart along the circumferential direction, and each cooling channel is continuously curved and connected between the corresponding conveying section and the confluence channel.

9. The driving device according to claim 8, characterized in that: Each of the cooling channels has a plurality of first turning sections arranged at intervals along the circumferential direction and away from the controller, a second turning section located between the corresponding conveying section and the confluence channel and adjacent to the controller, a first connecting section connected between the corresponding conveying section and the corresponding first turning section, a second connecting section connected between the corresponding first turning section and the second turning section, a third connecting section connected between the second turning section and the corresponding first turning section, and a fourth connecting section connected between the corresponding first turning section and the confluence channel, the first connecting section, the second connecting section, the third connecting section and the fourth connecting section being arranged at intervals along the circumferential direction.

10. The driving device according to claim 9, characterized in that: The casing includes a sleeve shell, and a first end shell and a second end shell respectively connected to opposite ends of the sleeve shell, the sleeve shell forms the first connecting section, the second connecting section, the third connecting section and the fourth connecting section of each cooling channel, the first end shell forms the first turning section of each cooling channel, the second end shell is connected to the controller and forms the branch channels arranged at intervals along the circumferential direction, the second turning section of each cooling channel, and the confluence channel.

11. A controller for a driving device, characterized in that: The controller includes a carrying shell and a control circuit board assembly. The carrying shell forms a heat dissipation channel for conveying cooling fluid. The control circuit board assembly is arranged on the carrying shell and corresponds to the position of the heat dissipation channel. The cooling fluid conveyed by the heat dissipation channel is used to dissipate heat for the control circuit board assembly.

12. The controller of the driving device according to claim 11, characterized in that: The heat dissipation channel is an open heat dissipation channel, and the control circuit board assembly closes the heat dissipation channel and can contact the cooling fluid flowing in the heat dissipation channel.

13. The controller of the driving device according to claim 11, characterized in that: The heat dissipation channel is in a continuously curved shape.

14. The controller of the driving device according to claim 11, characterized in that: The heat dissipation channel has a curved groove, and an inlet hole and an outlet hole respectively connected to the opposite ends of the curved groove. The curved groove is in an open and continuously curved shape. The control circuit board assembly closes the curved groove and can contact the cooling fluid flowing in the curved groove.

15. The controller of the driving device according to claim 14, characterized in that: The carrying shell has a carrying platform for carrying the control circuit board assembly and forming the heat dissipation channel, the carrying platform has a wall body and a boss body, the wall body has a wall surface, the boss body is protruding on the side of the wall body opposite to the wall surface, the boss body has a table surface opposite to the wall surface and carrying the control circuit board assembly, the table surface is recessed to form the curved groove, and the wall surface is recessed to form the inlet hole and the outlet hole.

16. The controller of the driving device according to claim 11, characterized in that: The carrying shell is further formed with a through hole, and the controller further comprises a plurality of wires, which are passed through the through hole and are electrically connected to the control circuit board assembly.

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