A motor driver

Abstract

The application provides a motor driver, comprising a shell, a heat dissipation base, a driving plate and a control plate arranged in the shell; a first end of the heat dissipation base is provided with a mounting base plate on a first side, and is provided with a heat dissipation tooth structure on a second side; a second end of the heat dissipation base is provided with an avoiding groove penetrating through the first side and the second side; the driving plate is located on the first side, and is provided with a power device and a capacitor device; the power device is fixed on the mounting base plate; the capacitor device is located in the avoiding groove; the control plate is located on the second side, and is provided with a control device; the control device is located in the avoiding groove. A larger containing space is formed in the avoiding groove, so that the heat of the capacitor device and the control device with relatively small heat in the avoiding groove can directly contact with the groove wall surface of the avoiding groove in the containing space, thereby being quickly guided to the heat dissipation tooth structure through the groove wall surface of the avoiding groove, so that the heat dissipation requirement of the motor driver is met while the compact structure is met.

Description

Technical Field

[0001] This application belongs to the field of motor driver technology, and more specifically, relates to a motor driver. Background Technology

[0002] As the core control device for motor operation, the motor driver is used to adjust the motor's speed, torque, direction, and other operating parameters to meet the power output requirements under different working conditions. Motor drivers are widely used in industries such as material packaging, 3C electronics, photovoltaics, and lithium batteries. With the rapid development of these industries, higher requirements are being placed on the performance, reliability, and compact structure of motor drivers.

[0003] However, existing motor drives are too large in size due to their unreasonable internal structure layout, making them difficult to fit into small installation spaces. Utility Model Content

[0004] The purpose of this application is to provide a motor driver to solve the technical problem of the large size of existing motor drivers.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a motor driver is provided, including a housing and a heat dissipation base, a drive board, and a control board disposed within the housing; the first end of the heat dissipation base is a mounting base on the first side, and the first end of the heat dissipation base is a heat dissipation tooth structure on the second side; the second end of the heat dissipation base has a clearance groove that extends through the first side and the second side; the drive board is located on the first side, and the drive board has a power device and a capacitor; the power device is fixed on the mounting base; the capacitor is located in the clearance groove; the control board is located on the second side, and the control board has a control device that is located in the clearance groove.

[0006] Furthermore, the capacitor is positioned close to the heat dissipation tooth structure, and within the clearance groove, the devices on the drive board and the control device are arranged alternately.

[0007] Furthermore, the drive board has a drive terminal at one end, and the control board has a control terminal at one end; the drive terminal and the control terminal are arranged alternately.

[0008] Furthermore, the drive board is also provided with a heating device, which is fixed on the mounting substrate, and a heat-conducting element is provided between the heating device, the power device and the mounting substrate.

[0009] Furthermore, the housing includes a first side plate, a second side plate, and a panel assembly. The first side plate is located on one side of the drive plate and is snapped into the heat sink base. The second side plate is located on one side of the control plate and is snapped into the heat sink base, exposing the heat sink tooth structure. The panel assembly is connected to the first side plate and the second side plate respectively.

[0010] Furthermore, the heat dissipation base is provided with a first limiting groove and a second limiting groove, the first side plate is provided with a first limiting rib, and the second side plate is provided with a second limiting rib; the first limiting rib is inserted into the first limiting groove, and the second limiting rib is inserted into the second limiting groove.

[0011] Furthermore, the heat dissipation base is provided with a first buckle and a second buckle, the first side plate is provided with a first slot, and the second side plate is provided with a second slot; the first slot is inserted into the first buckle, and the second slot is inserted into the second buckle; the first slot and the first limiting rib are respectively located on two adjacent end faces of the first side plate; the second slot and the second limiting rib are respectively located on two adjacent end faces of the second side plate.

[0012] Furthermore, the heat dissipation base is provided with guide ribs, the first side plate is provided with a first guide groove, and the second side plate is provided with a second guide groove; one end of the guide rib is engaged with the first guide groove, and the other end of the guide rib is engaged with the second guide groove.

[0013] Furthermore, the heat dissipation base has a first guide post on its first side, and the drive plate has a first limiting hole; the first guide post is inserted into the first limiting hole.

[0014] Furthermore, the second side of the heat dissipation base has a second guide post, and the control board has a second limiting hole; the second guide post is inserted into the second limiting hole.

[0015] The beneficial effects of the motor driver provided in this application are as follows: Compared with the prior art, in this application, the first end of the heat sink base is a mounting substrate on the first side, and the first end of the heat sink base is a heat dissipation tooth structure on the second side. In this way, the power devices with large heat generation on the drive board can be fixed on the mounting substrate, and the heat is conducted to the heat dissipation tooth structure through the mounting substrate for heat dissipation. In addition, the second end of the heat sink base has a clearance groove, and the clearance groove runs through the first side and the second side. In this way, the drive board and the control board can be installed from the first side and the second side respectively, and the capacitors on the drive board and the controllers on the control board can be placed in the clearance groove. The thickness of the two overlaps, and the installation structure is compact. Furthermore, a large accommodating space is formed in the clearance groove, so that the heat of the capacitors and controllers with relatively small heat generation in the clearance groove can directly contact the groove wall surface of the clearance groove in the accommodating space, thereby quickly guiding the heat through the groove wall surface of the clearance groove to the heat dissipation tooth structure. Thus, while meeting the requirements of compact structure, the heat dissipation requirements of the motor driver are met. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded structural diagram of a motor driver provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of the heat sink in the motor driver provided in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the drive board in the motor driver provided in the embodiments of this application;

[0020] Figure 4 This is a schematic diagram of the control board in the motor driver provided in the embodiments of this application;

[0021] Figure 5 This is an assembly diagram of the heat sink, drive board, and control board in the motor driver provided in an embodiment of this application;

[0022] Figure 6 This is an assembly diagram of the first side plate in the motor driver provided in an embodiment of this application;

[0023] Figure 7 This is an assembly diagram of the second side plate in the motor driver provided in an embodiment of this application;

[0024] Figure 8 This is an assembly diagram of the first side plate, the second side plate, and the heat sink in the motor driver provided in the embodiments of this application;

[0025] Figure 9 This is a schematic diagram of the structure of the panel body in the motor driver provided in the embodiments of this application;

[0026] Figure 10 This is an overall appearance view of the motor driver provided in an embodiment of this application.

[0027] The following are the labeling elements in the figure:

[0028] 100-Heat dissipation base; 101-Heat dissipation tooth structure; 102-Avoidance groove; 103-First limiting groove; 104-Second limiting groove; 105-First buckle; 106-Second buckle; 107-Guide rib; 108-First guide post; 109-Second guide post;

[0029] 200 - Driver board; 201 - Capacitor component; 202 - First limiting hole;

[0030] 300 - Control panel; 301 - Second limit hole;

[0031] 410 - First side plate; 411 - First limiting rib; 412 - First slot; 413 - First guide groove; 414 - First mounting buckle;

[0032] 420 - Second side plate; 421 - Second limiting rib; 422 - Second slot; 423 - Second guide groove; 424 - Second mounting buckle;

[0033] 430 - Panel assembly; 431 - Panel body; 432 - Buttons; 433 - Transparent display panel; 434 - First panel slot; 435 - Second panel slot. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] Please refer to the following: Figure 1 and Figure 2 The motor driver provided in the embodiments of this application will now be described. The motor driver includes a housing and a heat dissipation base 100, a drive board 200, and a control board 300 disposed within the housing. The first end of the heat dissipation base 100 is a mounting base on a first side, and the first end of the heat dissipation base 100 is a heat dissipation tooth structure 101 on a second side. The second end of the heat dissipation base 100 has a clearance groove 102 that extends through the first and second sides. The drive board 200 is located on the first side and has power devices and capacitors 201. The power devices are fixed to the mounting base. The capacitors 201 are located in the clearance groove 102. The control board 300 is located on the second side and has control devices located in the clearance groove 102.

[0039] Compared with the prior art, the motor driver provided in this application has the following features: The first end of the heat dissipation base 100 is a mounting substrate on the first side, and the second end of the heat dissipation base 100 is a heat dissipation tooth structure 101. This allows power devices on the drive board 200 that generate significant heat to be fixed on the mounting substrate, and the heat is conducted to the heat dissipation tooth structure 101 for cooling. Furthermore, the second end of the heat dissipation base 100 has a clearance groove 102 that extends through both the first and second sides. This allows the drive board 200 and the control board 300 to be accessed from the first and second sides respectively. The capacitor 201 on the drive board 200 and the controller on the control board 300 can both be placed in the clearance slot 102. The thickness of the two overlaps, resulting in a compact installation structure. Furthermore, the clearance slot 102 forms a large accommodating space, allowing the relatively low heat generation of the capacitor 201 and the controller in the clearance slot 102 to directly contact the slot wall surface of the clearance slot 102. This allows the heat to be quickly guided through the slot wall surface of the clearance slot 102 to the heat dissipation tooth structure 101, thus meeting the heat dissipation requirements of the motor driver while maintaining a compact structure.

[0040] In one embodiment of this application, please refer to Figure 5 The capacitor 201 is positioned close to the heat dissipation tooth structure 101 and within the clearance groove 102. The components on the drive board 200 and the control components are arranged alternately. Since the heat generated by the capacitor 201 is greater than that of the control components, its position close to the heat dissipation tooth structure 101 allows heat to be directly transferred to the heat dissipation tooth structure 101, resulting in better heat dissipation. Furthermore, the alternate arrangement of the components on the drive board 200 and the control components optimizes the arrangement of the components within the clearance groove 102, achieving optimal compactness of the component arrangement within the clearance groove 102.

[0041] In one embodiment of this application, the thickness of the first end of the control board 300 is greater than the thickness of the second end of the control board 300; the second end of the control board 300 is close to the capacitor 201.

[0042] In this embodiment, by designing the control board 300 with a thicker first end and a thinner second end, when the control board 300 is mounted on the second side of the heat sink 100, its thinner second end can form a staggered layout with the capacitor 201 located in the clearance groove 102, further reducing the space occupied by the control board 300 and the capacitor 201 in the vertical direction. This differentiated thickness design ensures the structural strength and installation stability required for the first end of the control board 300 due to the integration of many circuit components, while avoiding spatial interference between the second end and the capacitor 201 through the thinning treatment, making the overall structure more compact and providing favorable conditions for the miniaturization design of the motor driver.

[0043] In one embodiment of this application, the end of the drive board 200 is provided with a drive terminal, and the end of the control board 300 is provided with a control terminal; the drive terminals and the control terminals are arranged alternately.

[0044] In this embodiment, by arranging the drive terminals and control terminals in an alternating manner, interference between them during insertion and removal can be effectively avoided. This also shortens the signal transmission path and reduces the impact of electromagnetic interference on signal stability. When external connection harnesses are connected to the terminals, the alternating layout makes connection operations more convenient, facilitating later maintenance and repair. Furthermore, this arrangement allows for the rational allocation of terminal positions within limited installation space, further optimizing the overall wiring structure of the motor driver and improving product assembly efficiency and reliability.

[0045] Specifically, the drive terminals adopt European-style narrow terminals, whose compact size design can integrate more pins in a limited space to meet the multi-channel transmission requirements of drive signals; the control terminals adopt horizontal terminals, which can save the layout space on the control board 300 and facilitate quick docking with external controllers.

[0046] In one embodiment of this application, the drive board 200 is further provided with a heating device, the heating device is fixed on the mounting substrate, and a heat-conducting element is provided between the heating device and the power device and the mounting substrate.

[0047] In this embodiment, by adding a heat-conducting component between the heat-generating device, the power device, and the mounting substrate, the heat generated by the heat-generating device and the power device can be quickly transferred to the mounting substrate, and the heat can be transferred to the external environment through the heat dissipation tooth structure 101. This significantly improves the heat dissipation efficiency of the motor driver and avoids the problem of device performance degradation or shortened lifespan caused by excessively high local temperatures.

[0048] Specifically, thermal conductive components can be either thermal grease or thermally conductive silicone pads. Thermal grease has excellent thermal conductivity and filling properties, enabling it to tightly fit the tiny gaps between the heat-generating device, power device, and heat sink 100, reducing interfacial thermal resistance and ensuring efficient heat conduction. Thermally conductive silicone pads, on the other hand, have both good thermal conductivity and a certain degree of elasticity. During installation, they can compensate for flatness errors between different components through their own deformation, while also acting as a buffer and shock absorber to prevent damage to the devices from hard contact. The choice between the two thermal conductive components can be flexibly configured according to the requirements of thermal conductivity, installation process, and cost in the actual application scenario.

[0049] In one embodiment of this application, please refer to Figure 1The housing includes a first side plate 410, a second side plate 420, and a panel assembly 430. The first side plate 410 is located on one side of the drive plate 200 and is snapped into the heat sink base 100. The second side plate 420 is located on one side of the control plate 300, and is snapped into the heat sink base 100, exposing the heat dissipation tooth structure 101. The panel assembly 430 is connected to the first side plate 410 and the second side plate 420 respectively.

[0050] In this embodiment, the outer casing achieves a stable assembly with the heat sink 100 through the snap-fit ​​design of the first side plate 410, the second side plate 420, and the heat sink 100. Meanwhile, the connection of the panel assembly 430 further enhances the integrity of the overall structure. The first side plate 410 is positioned on the same side as the drive board 200, providing lateral protection to the drive board 200 and preventing external objects from directly contacting the electronic components on the drive board 200. The second side plate 420, positioned on the side of the control board 300, while snap-fitting and securing itself to the heat sink 100, exposes the heat dissipation tooth structure 101 to the external environment. This design ensures sufficient contact between the heat dissipation tooth structure 101 and the air, providing a good channel for heat dissipation and thus ensuring the efficient operation of the heat dissipation method.

[0051] In one embodiment of this application, please refer to the following: Figure 6 and Figure 7 The heat dissipation base 100 is provided with a first limiting groove 103 and a second limiting groove 104. The first side plate 410 is provided with a first limiting rib 411, and the second side plate 420 is provided with a second limiting rib 421. The first limiting rib 411 is inserted into the first limiting groove 103, and the second limiting rib 421 is inserted into the second limiting groove 104.

[0052] In this embodiment, the heat dissipation base 100, by setting a first limiting groove 103 and a second limiting groove 104, forms a precise insertion fit with the first limiting rib 411 of the first side plate 410 and the second limiting rib 421 of the second side plate 420, forming a preliminary installation guide; this limiting design can quickly guide the accurate position of the first side plate 410 and the second side plate 420 during assembly, effectively reducing installation errors.

[0053] In one embodiment of this application, please refer to the following: Figure 6 and Figure 7 The heat dissipation base 100 is provided with a first buckle 105 and a second buckle 106. The first side plate 410 is provided with a first slot 412 and the second side plate 420 is provided with a second slot 422. The first slot 412 is inserted into the first buckle 105 and the second slot 422 is inserted into the second buckle 106. The first slot 412 and the first limiting rib 411 are respectively located on two adjacent end faces of the first side plate 410. The second slot 422 and the second limiting rib 421 are respectively located on two adjacent end faces of the second side plate 420.

[0054] In this embodiment, the heat dissipation base 100 is fixed by a first snap fastener 105 to a first slot 412 of the first side plate 410, and a second snap fastener 106 to a second slot 422 of the second side plate 420. Combined with the previously used limiting ribs and limiting slots, a dual positioning structure is formed. The first slot 412 and the first limiting rib 411 are distributed on the adjacent end face of the first side plate 410, and the second slot 422 and the second limiting rib 421 are correspondingly distributed on the adjacent end face of the second side plate 420. This spatial layout allows the limiting and fixing effects to be applied to the side plate from different directions, which not only avoids the problem of force concentration in a single connection method, but also further improves the assembly accuracy while ensuring the stability of the installation, making the connection between the side plate and the heat dissipation base 100 tighter and more reliable, and effectively preventing loosening caused by vibration and other factors during use.

[0055] In one embodiment of this application, please refer to the following: Figure 6 and Figure 7 The heat dissipation base 100 is provided with guide ribs 107, the first side plate 410 is provided with a first guide groove 413, and the second side plate 420 is provided with a second guide groove 423; one end of the guide rib 107 is engaged with the first guide groove 413, and the other end of the guide rib 107 is engaged with the second guide groove 423.

[0056] In this embodiment, the heat dissipation base 100 forms a snap-fit ​​engagement with the first guide groove 413 of the first side plate 410 and the second guide groove 423 of the second side plate 420 via guide ribs 107, further optimizing the assembly guiding performance of the side plates and the base. The two ends of the guide ribs 107 are embedded in their corresponding guide grooves, which can precisely guide the movement trajectory of the first side plate 410 and the second side plate 420 during installation, effectively avoiding installation difficulties or component damage caused by misalignment.

[0057] In one embodiment of this application, please refer to the following: Figure 8 and Figure 9 The panel assembly 430 includes a panel body 431 and buttons 432 and a transparent display panel 433 disposed on the panel body 431; such as Figure 1 and Figure 10As shown, the panel body 431 has a first panel slot 434 and a second panel slot 435 on both sides, respectively. A first mounting buckle 414 is provided on the first side plate 410, and a second mounting buckle 424 is provided on the second side plate 420. The first mounting buckle 414 engages with the first panel slot 434, and the second mounting buckle 424 engages with the second panel slot 435, achieving a secure connection between the panel assembly 430 and the outer casing. The button 432 adopts a touch-sensitive design with good tactile feedback, facilitating quick operation of the motor driver's start / stop, mode switching, and other functions. The transparent display panel 433 is made of high-transmittance acrylic material, clearly displaying the driver's operating parameters, such as speed, temperature, and current, and possesses certain dustproof and waterproof properties, adapting to different working environments. The edges of the panel body 431 are rounded, which not only enhances the product's aesthetics but also avoids the risk of scratches during installation and use.

[0058] In one embodiment of this application, please refer to the following: Figure 2 and Figure 3 The heat sink 100 has a first guide post 108 on its first side, and the drive plate 200 has a first limiting hole 202; the first guide post 108 is inserted into the first limiting hole 202.

[0059] In this embodiment, the cooperation between the first guide post 108 and the first limiting hole 202 not only achieves the initial positioning of the drive plate 200 on the heat sink base 100, but also provides precise guidance for the drive plate 200 during installation, avoiding installation errors caused by positional offset. The first side of the heat sink base 100 is also provided with a first support stud, and the drive plate 200 is correspondingly provided with a first mounting hole. The first support stud and the first mounting hole are connected by screws to achieve fixed installation of the drive plate 200 and the heat sink base 100.

[0060] In one embodiment of this application, please refer to the following: Figure 2 and Figure 4 The second side of the heat dissipation base 100 has a second guide post 109, and the control board 300 has a second limiting hole 301; the second guide post 109 is inserted into the second limiting hole 301.

[0061] In this embodiment, the cooperation between the second guide post 109 and the second limiting hole 301 further optimizes the installation and positioning accuracy of the control board 300 on the heat sink base 100. The dual guide structure ensures the accuracy of the relative position of the drive board 200 and the control board 300 on the heat sink base 100, providing a structural foundation for the subsequent circuit connection and signal transmission stability of various components. A second support stud is also provided on the second side of the heat sink base 100, and a corresponding second mounting hole is provided on the control board 300. The second support stud and the second mounting hole are fastened with bolts, so that the control board 300 can be stably fixed on the heat sink base 100.

[0062] In one embodiment of this application, the heat sink 100 is an aluminum alloy die-cast part. The first guide post 108, the second guide post 109, the first support stud, and the second support stud on the heat sink 100 are integrally formed with the heat sink 100. This integrated die-casting process not only simplifies the production process of the heat sink 100 and reduces assembly errors, but also ensures the connection strength and thermal conductivity between the various structural components. Aluminum alloy material has the characteristics of low density and high thermal conductivity, which not only reduces the overall weight of the motor driver, but also efficiently conducts the heat generated by the power device to the heat dissipation tooth structure 101, achieving rapid heat dissipation through natural convection.

[0063] In one embodiment of this application, the outer shell is a plastic part, meaning it is manufactured using a plastic molding process. Plastic materials have excellent insulation properties, effectively blocking electrical connections between the internal circuitry and the external environment, thus improving the safety of the motor driver during use. Simultaneously, the low density of plastic materials further reduces the overall weight of the product, and its simple molding process can meet the design requirements of complex shell structures, reducing manufacturing costs.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A motor driver, characterized in that, Includes the outer casing and the contents disposed within the outer casing: A heat dissipation base has a first side and a second side disposed opposite to each other; the first end of the heat dissipation base on the first side is a mounting base plate, and the first end of the heat dissipation base on the second side is a heat dissipation tooth structure; the second end of the heat dissipation base has a clearance groove that passes through the first side and the second side. A drive board is located on the first side and has power devices and capacitors; the power devices are fixed on the mounting base plate; the capacitors are located in the clearance groove. A control board located on the second side, the control board having control devices located in the clearance groove.

2. The motor driver as described in claim 1, characterized in that, The capacitor is positioned close to the heat dissipation tooth structure, and within the clearance groove, the components on the drive board and the control device are arranged alternately.

3. The motor driver as described in claim 1, characterized in that, The drive board has a drive terminal at one end, and the control board has a control terminal at one end; the drive terminal and the control terminal are arranged alternately.

4. The motor driver as described in claim 1, characterized in that, The drive board is also provided with a heating device, which is fixed on the mounting base plate. A heat-conducting component is also provided between the heating device, the power device and the mounting base plate.

5. The motor driver as described in claim 1, characterized in that, The housing includes a first side plate, a second side plate, and a panel assembly. The first side plate is located on one side of the drive plate and is snapped into the heat sink base. The second side plate is located on one side of the control plate and is snapped into the heat sink base, exposing the heat sink tooth structure. The panel assembly is connected to the first side plate and the second side plate respectively.

6. The motor driver as described in claim 5, characterized in that, The heat dissipation base is provided with a first limiting groove and a second limiting groove, the first side plate is provided with a first limiting rib, and the second side plate is provided with a second limiting rib; the first limiting rib is inserted into the first limiting groove, and the second limiting rib is inserted into the second limiting groove.

7. The motor driver as described in claim 6, characterized in that, The heat dissipation base is provided with a first buckle and a second buckle, the first side plate is provided with a first slot, and the second side plate is provided with a second slot; the first slot is inserted into the first buckle, and the second slot is inserted into the second buckle; The first slot and the first limiting rib are respectively located on two adjacent end faces of the first side plate; the second slot and the second limiting rib are respectively located on two adjacent end faces of the second side plate.

8. The motor driver as described in claim 5, characterized in that, The heat dissipation base is provided with guide ribs, the first side plate is provided with a first guide groove, and the second side plate is provided with a second guide groove; one end of the guide rib is engaged with the first guide groove, and the other end of the guide rib is engaged with the second guide groove.

9. The motor driver according to any one of claims 1-8, characterized in that, The heat sink base has a first guide post on its first side, and the drive plate has a first limiting hole; the first guide post is inserted into the first limiting hole.

10. The motor driver as claimed in claim 9, characterized in that, The second side of the heat dissipation base has a second guide post, and the control board has a second limiting hole; the second guide post is inserted into the second limiting hole.

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