Servo driver with external brake resistor

Abstract

The utility model discloses a servo driver with an external brake resistor, the servo driver comprises a servo drive circuit board, a heat dissipation support and a brake resistor, the heat dissipation support is fixed on the servo drive circuit board, the brake resistor is fixed on the heat dissipation support, and the brake resistor is fixed on the heat dissipation support. The brake resistor is electrically connected with the servo drive circuit board, the heat dissipation support is a heat dissipation channel of the brake resistor and quickly releases heat generated by the brake resistor, and meanwhile, the brake resistor and the heat dissipation support are integrated on the servo drive circuit board, so that space can be saved, and the service life of the brake resistor is prolonged. According to the technical scheme, the servo driver has a more compact structural layout, and the problems that the temperature of the brake resistor rises too fast, the heat dissipation efficiency is low, and even a shell of the servo driver is burnt are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to servo driver technical field especially relates to a kind of servo driver of external braking resistance. BACKGROUND

[0002] In modern industrial automation and electric vehicle field, the precise control and fast response of motor are crucial. However, when the motor needs to be quickly decelerated or stopped, due to the existence of inertial load, a large amount of regenerative energy will be generated. If not handled, this part of energy will cause the temperature inside the motor to rise, and in severe cases, it may even damage or burn the motor. To solve this problem, a braking resistor is usually installed on the circuit board to absorb these regenerative energies and convert them into heat energy.

[0003] Figure 1 The existing servo driver structure is shown in the figure, which includes a servo drive circuit board 1, a braking resistor 3 and a heat dissipation bracket 2. The braking resistor 3 and the heat dissipation bracket 2 are fixed on the servo drive circuit board 1 respectively, and the heat dissipation bracket 2 provides heat dissipation function for the servo driver. The braking resistor 3 generates a large amount of heat during operation, which will cause its temperature to rise if not dissipated in time, affecting the performance and service life of the braking resistor. At the same time, since the braking resistor 3 is fixed on the servo drive circuit board, it also causes thermal damage to the electronic components on the servo drive circuit board.

[0004] The braking resistor under this structure works for a long time at high temperature, and the overall heat dissipation efficiency relies on air medium and circuit board conduction heat. The braking resistor under this way is not fast enough, which will affect the overall temperature of the servo driver, and in severe cases, it will burn the servo driver shell and damage the internal components of the servo driver. UTILITY MODEL CONTENTS

[0005] In view of the above defects, the utility model aims to provide a servo driver with external braking resistor, which solves the problem of rapid temperature rise and low heat dissipation efficiency of the braking resistor, and even burns the servo driver shell.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A servo driver with external braking resistor, the servo driver includes a servo drive circuit board, a heat dissipation bracket and a braking resistor, wherein: the heat dissipation bracket is fixed on the servo drive circuit board, the braking resistor is fixed on the heat dissipation bracket, and the braking resistor is electrically connected with the servo drive circuit board.

[0008] Further, the heat dissipation support comprises a heat dissipation body, a plurality of heat dissipation fins and a first mounting slot, the height of the first mounting slot is lower than that of the heat dissipation fins, the bottom of the heat dissipation body is fixed on the servo drive circuit board, and the braking resistor is mounted in the first mounting slot.

[0009] Further, a wire clamping slot is arranged on the heat dissipation body, the braking resistor and the servo drive circuit board are connected through an electric connection wire, one end of the electric connection wire is connected with the braking resistor, the electric connection wire is clamped in the wire clamping slot and connected with the servo drive circuit board through the other end.

[0010] Further, an electric resistance support is arranged on the braking resistor, the braking resistor is located in the electric resistance support, a connecting hole is arranged on the edge of the electric resistance support, and the electric resistance support is fixed on the heat dissipation body through the connecting hole by a screw.

[0011] Further, the plurality of heat dissipation fins are arranged on the heat dissipation body in parallel and at intervals.

[0012] Further, a second mounting slot and a heat radiator are arranged on the heat dissipation support, the height of the second mounting slot is lower than that of the heat dissipation fins, and the heat radiator is mounted in the second mounting slot.

[0013] Further, the heat radiator is a fan.

[0014] Further, the heat dissipation support further comprises a plurality of connecting threaded holes, the heat radiator is provided with a plurality of connecting through holes, and each connecting through hole is arranged in correspondence with a corresponding connecting threaded hole.

[0015] Further, a plurality of supporting columns are arranged on the heat dissipation support, and the plurality of supporting columns are arranged at intervals between the heat dissipation support and the servo drive circuit board.

[0016] Further, the heat dissipation body and the heat dissipation support are made of aluminum alloy.

[0017] The technical scheme provided by the utility model can have the following beneficial effects: the heat dissipation support is directly installed on the surface of the servo drive circuit board, the servo drive circuit board generates a large amount of heat during operation, the heat is transferred from the servo drive circuit board to the heat dissipation support through heat conduction, meanwhile, the braking resistor is directly installed on the surface of the heat dissipation support, the heat dissipation support provides a heat dissipation channel for the braking resistor, the braking resistor is cooled, and the heat generated by the servo drive circuit board and the braking resistor is quickly dissipated into the air through the heat dissipation support. Meanwhile, the braking resistor and the heat dissipation support are integrated on the servo drive circuit board, space can be saved, the servo driver has a more compact structure layout, and the technical scheme solves the problems of too fast temperature rise of the braking resistor, low heat dissipation efficiency and even burnt servo driver shell. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0019] Figure 1 It is a structural schematic diagram of the existing servo driver;

[0020] Figure 2 It is a structural schematic diagram of the servo driver in the utility model;

[0021] Figure 3 It is a structural schematic diagram of the heat dissipation support in the utility model;

[0022] Figure 4 It is a structural schematic diagram of the resistor support in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the servo driver in the utility model.

[0024] Among them: servo drive circuit board 1, heat dissipation support 2, heat dissipation body 21, card line groove 210, heat dissipation fin 22, first installation slot 23, second installation slot 24, threaded connection hole 25, support column 26, braking resistor 3, radiator 4, connecting through hole 41, resistor support 5, connecting hole 51 and electric connection wire 6. DETAILED DESCRIPTION

[0025] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0026] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features, which are used to distinguish the described features and have no order or importance.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The technical solutions of the present application will be further described below in combination with the specific embodiments. Figures 2-5 The technical solutions of the present application will be further described below in combination with the specific embodiments.

[0029] In one preferred embodiment of the present application, an external braking resistor servo driver, the servo driver comprises: a servo drive circuit board 1, a heat dissipation bracket 2 and a braking resistor 3, wherein: the heat dissipation bracket 2 is fixed on the servo drive circuit board 1, the braking resistor 3 is fixed on the heat dissipation bracket 2, and the braking resistor 3 is electrically connected with the servo drive circuit board 1.

[0030] Specifically, when the servo motor needs to brake or decelerate, the braking resistor 3 is connected to the circuit to operate. At this time, the energy of the servo motor is consumed through the braking resistor 3, converted into heat energy. If heat is not dissipated in time, its temperature will rise, affecting the performance and lifespan of the resistor. Compared with the prior art where the braking resistor 3 is directly fixed to the drive circuit board 1, this technical solution uses a heat sink bracket 2 fixed to the servo drive circuit board 1, and then the braking resistor 3 fixed to the heat sink bracket 2. In this embodiment, the heat sink bracket 2 provides heat dissipation for the entire servo drive: the heat generated by the servo drive circuit board 1 during operation is transferred from the servo drive circuit board 1 to the heat sink bracket 2 through thermal conduction, while also providing a heat dissipation channel for the braking resistor 3. The heat sink bracket 2 quickly dissipates the heat generated by the servo drive circuit board 1 and the braking resistor 3 into the air. Furthermore, integrating the braking resistor 3 and the heat sink bracket 2 onto the servo drive circuit board 1 saves space, allowing the servo drive to have a more compact structural layout. This technical solution solves the problem of the braking resistor's temperature rising too quickly and its low heat dissipation efficiency, even causing the servo drive casing to scorch.

[0031] In an optional embodiment, the heat dissipation bracket 2 includes a heat dissipation body 21 and a plurality of heat dissipation fins 22 disposed on the heat dissipation body 21 and a first mounting groove 23. The height of the first mounting groove 23 is lower than the height of the heat dissipation fins 22. The bottom of the heat dissipation body 21 is fixed on the servo drive circuit board 1, and the braking resistor 3 is mounted in the first mounting groove 23.

[0032] Specifically, there is a height difference between the first mounting groove 23 and the heat dissipation fins 22. This height difference allows the braking resistor 3 to fit tightly into the first mounting groove 23 of the heat dissipation fins 22, forming a more direct heat conduction path and improving heat dissipation efficiency. The braking resistor 3 is cleverly embedded in the low-lying area of ​​the heat dissipation fins 22, avoiding additional space occupation. Furthermore, the braking resistor 3 can easily slide into or out of the first mounting groove 23 without a complex disassembly process, which greatly reduces maintenance costs and difficulty. Moreover, the bottom of the heat dissipation body 21 is fixed to the servo drive circuit board 1. The heat generated by the servo drive circuit board 1 is transferred to the heat dissipation body 21 through heat conduction, and then the heat dissipation body 21 dissipates the heat into the air.

[0033] In an optional embodiment, the heat dissipation body 21 is provided with a wire slot 210, and the braking resistor 3 and the servo drive circuit board 1 are connected by an electrical connection line 6. One end of the electrical connection line 6 is connected to the braking resistor 3, and the electrical connection line 6 is locked in the wire slot 210 and connected to the servo drive circuit board 1 through the other end.

[0034] Specifically, the electrical connection cable 6 can be orderly fixed to the heat dissipation body 21 through the cable clamping groove 210, which avoids the electrical connection cable 6 being arranged haphazardly in the space. At the same time, since the electrical connection cable 6 is clamped in the cable clamping groove 210, it can prevent the electrical connection cable 6 from being pulled at will, thereby affecting the electrical performance and reducing the risk of the electrical connection cable 6 falling off from both ends.

[0035] In an optional embodiment, a resistor bracket 5 is provided on the braking resistor 3, the braking resistor 3 is located inside the resistor bracket 5, and a connection hole 51 is provided on the edge of the resistor bracket 5. The resistor bracket 5 is fixed to the heat dissipation body 21 by screws passing through the connection hole 51.

[0036] Specifically, the braking resistor 3 can be fixedly installed on the resistor bracket 5 by means of clips, welding, or bonding. The fixing of the resistor bracket 5 ensures that the braking resistor 3 is stably fixed to the heat dissipation bracket 2, preventing it from falling off and causing a reduction in electrical performance. For example, in harsh environments such as vibration or impact, the resistor bracket 3 is fixed to the heat dissipation body 21 with screws, making it less prone to loosening or falling off, thus ensuring the stability and reliability of the entire system.

[0037] In an optional embodiment, the plurality of heat dissipation fins 22 are arranged in parallel at intervals on the heat dissipation body 21.

[0038] Specifically, the heat dissipation fins 22 greatly increase the heat dissipation area, allowing heat to be transferred from the heat dissipation body 21 to the surrounding environment more quickly and effectively. Simultaneously, the parallel spacing of the heat dissipation fins 22 ensures that heat is evenly distributed on the heat dissipation body 21 and conducts rapidly along the fin direction, helping to reduce thermal resistance, improve heat conduction efficiency, and allow heat to dissipate from the heat dissipation fins 22 more quickly.

[0039] In an optional embodiment, the heat dissipation bracket 2 is provided with a second mounting groove 24 and a heat sink 4, the height of the second mounting groove 24 is lower than the height of the heat dissipation fins 22, and the heat sink 4 is mounted in the second mounting groove 24.

[0040] Specifically, the design of the second mounting slot 24 allows the heat sink 4 to be tightly installed in the middle area of ​​the heat dissipation fins 22, and this close contact facilitates rapid heat transfer. Simultaneously, the heat sink 4, as an additional heat dissipation element, can further absorb and disperse the heat generated by the braking resistor 3, thereby improving the overall heat dissipation performance. Furthermore, the design of the second mounting slot 24 provides greater flexibility to the heat dissipation device. Depending on different heat load requirements, heat sinks 4 of different specifications and materials can be selected for installation to meet various heat dissipation needs.

[0041] In an alternative embodiment, the heat sink 4 is a fan.

[0042] Specifically, the fan, as an active heat dissipation element, generates a powerful airflow, accelerating air movement and thus carrying away heat from the heat sink 2. This forced convection cooling method is more efficient than natural convection cooling, significantly reducing the temperature of the entire heat sink 2 and improving overall heat dissipation efficiency.

[0043] In an optional embodiment, the heat dissipation bracket 2 further includes a plurality of threaded holes 25, and the heat sink 4 is provided with a plurality of through holes 41, each of the through holes 41 being vertically and vertically aligned with the corresponding threaded hole 25.

[0044] Specifically, through the engagement of the threaded hole 25 and the through hole 41, the radiator 4 can be easily connected to the heat dissipation bracket 2 using bolts or other threaded fasteners. This installation method not only simplifies the installation process but also improves installation efficiency and reduces installation costs. Threaded connection is a reliable connection method; the threaded connection between the radiator 4 and the heat dissipation bracket 2 is stable and secure, able to withstand external vibrations and impacts, ensuring the long-term stable operation of the radiator 4.

[0045] In an optional embodiment, the heat dissipation bracket 2 further includes a plurality of support columns 26, which are evenly spaced between the heat dissipation bracket 3 and the servo drive circuit board 1.

[0046] Specifically, the evenly spaced support columns 26 make the installation of the heat sink 2 on the servo drive circuit board 1 more stable. This design helps reduce loosening and damage caused by vibration or impact, improving the structural stability of the entire servo drive. Simultaneously, the gaps formed between the support columns 26, the heat sink 2, and the servo drive circuit board 1 facilitate airflow, enhancing natural convection cooling and thus more effectively removing the heat generated by the servo drive circuit board 1.

[0047] In an optional embodiment, the heat dissipation body 21 and the heat dissipation fins 22 are made of aluminum alloy.

[0048] Specifically, aluminum alloy has excellent thermal conductivity and a high thermal conductivity coefficient. This means that the heat generated by the servo drive circuit board 1 can be transferred to the heat sink 21 more quickly. The heat sink bracket 2 then transfers the heat to the heat sink fins 22. Simultaneously, the braking resistor 3 is mounted on the heat sink fins 22, and heat is transferred from the braking resistor 3 to the heat sink fins 22. The heat is then dissipated into the air through the heat sink fins 22. This efficient heat conduction significantly improves heat dissipation efficiency, helps reduce the temperature of the braking resistor 3, and ensures stable operation of the equipment.

[0049] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A servo driver with an external braking resistor, characterized in that, The servo driver includes: a servo drive circuit board, a heat sink, and a braking resistor, wherein: The heat sink bracket is fixed on the servo drive circuit board, the braking resistor is fixed on the heat sink bracket, and the braking resistor is electrically connected to the servo drive circuit board.

2. The servo driver with an external braking resistor according to claim 1, characterized in that, The heat dissipation bracket includes a heat dissipation body, a plurality of heat dissipation fins disposed on the heat dissipation body, and a first mounting slot. The height of the first mounting slot is lower than the height of the heat dissipation fins. The bottom of the heat dissipation body is fixed on the servo drive circuit board, and the braking resistor is mounted in the first mounting slot.

3. The servo driver with an external braking resistor as described in claim 2, characterized in that, The heat dissipation body is provided with a wire slot. The braking resistor and the servo drive circuit board are connected by an electrical connection wire. One end of the electrical connection wire is connected to the braking resistor, and the electrical connection wire is locked in the wire slot and connected to the servo drive circuit board through the other end.

4. The servo driver with an external braking resistor as described in claim 2, characterized in that, The braking resistor is provided with a resistor bracket, the braking resistor is located inside the resistor bracket, the resistor bracket is provided with a connection hole on its edge, and the resistor bracket is fixed to the heat dissipation body by screws passing through the connection hole.

5. The servo driver with an external braking resistor as described in claim 2, characterized in that, The plurality of heat dissipation fins are arranged in parallel at intervals on the heat dissipation body.

6. The servo driver with an external braking resistor as described in claim 2, characterized in that, The heat dissipation bracket is provided with a second mounting slot and a heat sink. The height of the second mounting slot is lower than the height of the heat dissipation fins, and the heat sink is installed in the second mounting slot.

7. The servo driver with an external braking resistor as described in claim 6, characterized in that, The heat sink is a fan.

8. The servo driver with an external braking resistor as described in claim 6, characterized in that, The heat dissipation bracket also includes several threaded holes, and the heat sink is provided with several through holes, with each through hole corresponding to the threaded hole above and below.

9. The servo driver with an external braking resistor as described in claim 2, characterized in that, The heat dissipation bracket is provided with a plurality of support columns, which are evenly spaced between the heat dissipation bracket and the servo drive circuit board.

10. The servo driver with an external braking resistor as described in claim 2, characterized in that, Both the heat sink body and the heat sink bracket are made of aluminum alloy.

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