Servo driver

Abstract

The utility model discloses a servo driver, and relates to the technical field of automation, the servo driver comprises a strong current component, a weak current component and a circuit board, the circuit board comprises a first area and a second area, and the first area is used for setting the strong current component; the second area is used for arranging a weak current component; wherein the first area and the second area are isolated by an isolation belt; the isolation strip is provided with an insulation area and an isolation device. According to the servo driver, signal isolation is carried out on the strong current component and the weak current component, signal interference on the circuit board is reduced, and then the safety and reliability of the servo driver are improved.

Description

Technical Field

[0001] The present application relates to the field of automation technology, and in particular to a servo drive. Background Art

[0002] Servo drives, the controllers for servo motors, are widely used in modern industrial automation equipment and are a crucial component of modern motion control systems. Servo drives are often used in applications requiring high-precision control. However, the presence of interference-susceptible components on the servo drive's circuit board can reduce the drive's stability and reliability. Therefore, circuit board layout design to improve anti-interference performance remains a key research area for those skilled in the art. Utility Model Content

[0003] The main purpose of this application is to provide a servo drive, which aims to isolate the signals of high-voltage components and low-voltage components, reduce signal interference on the circuit board, and thereby improve the safety and reliability of the servo drive.

[0004] To achieve the above-mentioned purpose, the present application proposes a servo driver, comprising strong current components, weak current components and a circuit board.

[0005] The circuit board comprises:

[0006] The first area is for the installation of high-voltage components;

[0007] The second area is for the installation of weak current components;

[0008] The first area and the second area are isolated by an isolation zone; the isolation zone is provided with an insulating area and an isolation device.

[0009] Optionally, the isolation strip is located at a diagonal position of the circuit board.

[0010] Optionally, the first region includes a first sub-region, a second sub-region, and a third sub-region, the first sub-region is arranged at an edge of the first side surface of the circuit board, the third sub-region is arranged at an edge of the second side surface of the circuit board, and the second sub-region is arranged between the first sub-region and the third sub-region;

[0011] And / or, the second region includes a fourth sub-region, a fifth sub-region, and a sixth sub-region, the fourth sub-region is arranged at an edge position of the third side surface of the circuit board, the fifth sub-region is arranged at an edge position of the fourth side surface of the circuit board; and the sixth sub-region is arranged near the isolation zone;

[0012] Among them, the first sub-area is the high-current protection circuit layout area, the second sub-area is the power conversion circuit layout area, the third sub-area is the power processing circuit layout area; the fourth sub-area is the low-current protection circuit layout area; the fifth sub-area is the communication circuit layout area, and the sixth sub-area is the control circuit layout area.

[0013] Optionally, the high-voltage components include one or more combinations of the following: high-voltage terminals, power transformers, power integrated modules, bus capacitors, brake relays, brake resistors, soft-start circuits, and filter circuits;

[0014] Among them, the high-voltage terminal, the brake relay, the brake resistor, the soft start circuit and the filter circuit are arranged in the first sub-area, the power integration module and the bus capacitor are arranged in the second sub-area, and the power transformer is arranged in the third sub-area.

[0015] Optionally, the weak current components include one or more of the following combinations: a safe torque interrupt interface, a fan, a display button, a control circuit, a debugging interface, a communication interface, a temperature detection unit, an external input and output IO interface, and an encoder interface;

[0016] The safe torque interrupt interface and the fan are arranged in the fourth sub-area, the display button, the debugging interface, the communication interface, the external input and output IO interface and the encoder interface are arranged in the fifth sub-area, and the control circuit and the temperature detection unit are arranged in the sixth sub-area.

[0017] Optionally, the servo drive includes a bus, a main power supply and an auxiliary power supply, and the main power supply and the auxiliary power supply are electrically connected to the bus, respectively.

[0018] Optionally, the auxiliary power supply includes a control power supply and a driving power supply, the control power supply is arranged in the fourth sub-area, and the driving power supply is arranged in the third sub-area.

[0019] Optionally, the power integration module includes an inverter circuit, and a driving power supply is electrically connected to the inverter circuit to drive the inverter circuit to operate.

[0020] Optionally, there are multiple driving power supplies, the inverter circuit includes a full-bridge inverter circuit, and the multiple driving power supplies are electrically connected to the multiple switching tubes of the full-bridge inverter circuit in a one-to-one correspondence.

[0021] Optionally, the isolation device includes an optocoupler device, a first end of the optocoupler device is electrically connected to the control circuit, a second end of the optocoupler device is electrically connected to the power integration module, and the isolation device is arranged close to the control circuit and the power integration module.

[0022] The present application proposes a servo drive, including high-voltage components, low-voltage components and a circuit board, wherein the circuit board includes a first area and a second area, the first area is for setting high-voltage components; the second area is for setting low-voltage components; wherein the first area and the second area are separated by an isolation belt; the isolation belt is provided with an insulating area and an isolation device.

[0023] In practical applications, the isolation belt and isolation device set between the first area and the second area on the circuit board can isolate the signals of high-voltage components and low-voltage components, reduce the interference between high-voltage signals and low-voltage signals, and enhance the safety and reliability of the servo drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of a circuit module of an embodiment of a servo driver of the present application;

[0026] Figure 2 This is a schematic diagram of a module of an embodiment of a circuit board of a servo drive of the present application;

[0027] Figure 3 This is a schematic diagram of a circuit module of another embodiment of the servo driver of the present application;

[0028] Figure 4 This is a schematic diagram of a circuit module of another embodiment of the servo driver of the present application;

[0029] Figure 5 This is a schematic diagram of a circuit module of another embodiment of the servo driver of the present application.

[0030] Description of Figure Numbers:

[0031] 100, first area; 200, second area; 300, isolation zone; 110, first sub-area; 120, second sub-area; 130, third sub-area; 210, fourth sub-area; 220, fifth sub-area; 230, sixth sub-area; 11, auxiliary power transformer; 12, power integrated module; 13, bus capacitor; 14, brake relay; 15, brake resistor; 16, soft start circuit; 17, filter circuit; 18, high-voltage terminal; 21, safe torque interrupt interface; 22, fan; 23, display button; 24, control circuit; 25, debugging interface; 26, communication interface; 27, temperature detection unit; 28, external input and output IO interface; 29, encoder interface; 3, isolation device; 41, 5V control power supply; 42, 24V control power supply; 43, upper bridge drive power supply; 44, lower bridge drive power supply.

[0032] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0035] Servo drives, the controllers for servo motors, are widely used in modern industrial automation equipment and are a crucial component of modern motion control systems. Servo drives are often used in applications requiring high-precision control. However, the presence of interference-susceptible components on the servo drive's circuit board can reduce the drive's stability and reliability. Therefore, circuit board layout design to improve anti-interference performance remains a key research area for those skilled in the art.

[0036] For this purpose, refer to Figure 1The present application proposes a servo driver, including strong current components, weak current components and a circuit board, wherein the circuit board includes:

[0037] The first area 100 is for arranging high-voltage components;

[0038] The second area 200 is for arranging weak current components;

[0039] The first region 100 and the second region 200 are isolated by an isolation zone 300 ; the isolation zone 300 is provided with an insulating region and an isolation device 3 .

[0040] In this embodiment, the circuit board can be a multi-layer structure, with the first region 100 and the second region 200 having different layers. High-voltage components and low-voltage components can be placed on different layers in the first region 100 and the second region 200, respectively, to reduce interference from high-voltage components on low-voltage components. This can alleviate problems such as low-voltage signals being easily interfered with by high-voltage signals, which can lead to inaccurate data transmitted by low-voltage signals and unreliable operation of the applied servo drive.

[0041] In this embodiment, the circuit board can be used in controllers for various automated equipment. These automated equipment include, but are not limited to, robots and CNC machine tools. For example, the circuit board of this application can be used in a defibrillator controller, which includes circuit modules such as a power supply circuit, a boost circuit, a switching circuit, a physiological detection circuit, and a main control chip. It is understood that the operating voltage of the main control chip is typically between 3.3V and 5V, while the output voltage of the boost circuit can be tens of volts. Therefore, the main control chip is susceptible to interference from the boost circuit's output signal, resulting in inaccurate transmitted data and, in turn, reducing the reliability of the defibrillator controller. In this embodiment, the physiological detection circuit and the main control chip can both be located in the second region 200, while the switching circuit, power supply circuit, and boost circuit can be located in the first region 100. This prevents electrical signals within the first region 100 of the circuit board from interfering with electrical signals within the second region 200. This makes the weak electrical signals from the physiological detection circuit and the main control chip more accurate, reduces attenuation, oscillation, and interference of the weak electrical signals, and thereby improves the accuracy of the main control chip's execution of related control processes and enhances the reliability of the defibrillator. Optionally, the circuit board of the present application is applied to the controller of the warming blanket, including a power supply circuit and a control circuit 24, wherein the power supply circuit includes a heating device power supply circuit and a control circuit 24 power supply circuit, and the control circuit 24 includes a main control module and a key module. The power supply circuit usually flows through a strong voltage signal (such as 220V), and the control circuit 24 is usually a low-voltage circuit (such as 5V). The power supply circuit is set in the first area 100 and the control circuit 24 is set in the second area 200. The power supply circuit and the control circuit 24 are isolated through the circuit board layout, and the power supply circuit and the control circuit 24 are isolated using an isolation belt 300 (such as a groove), which increases safety and has a certain anti-interference ability for EMC. Optionally, the circuit board of the present application is applied to the servo drive of automation equipment. The high-heat-generating devices of the servo drive, such as the intelligent power module IPM, the PFC composed of the insulated gate bipolar transistor IGBT1 and the diode, the rectifier and the fan drive module can be arranged in the first area 100, and the main control chip is arranged in the second area 200. In this way, the strong and weak electrical components are arranged separately, thereby improving the interference effect of the electrical signal in the first area 100 on the main control chip in the second area 200.

[0042] Optionally, in one embodiment, the isolation zone 300 forms an isolation region, wherein the isolation region may be a region where no devices are provided or a region where no copper is covered, so as to achieve spacing between the first region 100 and the second region 200 .

[0043] Optionally, in one embodiment, grounding copper may be laid throughout or partially within the isolation region to improve the heat dissipation of the circuit board, provide a ground plane, and shield electromagnetic interference (EMI). For example, grounding copper may be laid around weak current components in the second region 200 to reduce the impact of electrical signals within the first region 100 on signals flowing through the weak current components in the second region 200.

[0044] Optionally, in one embodiment, an isolation slot is provided within the isolation region, for example, by cutting a gap or slot in the mechanical layer of the circuit board, thereby improving signal isolation between the first region 100 and the second region 200. The number of isolation slots may be one, i.e., the circuit board within the isolation region is hollowed out to achieve physical isolation. Alternatively, in another embodiment, the number of isolation slots may be multiple, with gaps provided between the multiple isolation slots (the circuit board will not be hollowed out at the gaps). This ensures physical isolation while also ensuring the structural strength of the circuit board and improving the mounting stress of the circuit board.

[0045] It should be noted that the width of the isolation band 300 can be set according to the signal frequency and power in actual applications. For example, in high-frequency or high-power applications, a wider isolation band 300 is usually required to reduce crosstalk between signals.

[0046] In one embodiment, the isolation zone 300 is provided with an insulating region. For example, an isolation groove is provided in the isolation region, and a filler, such as insulating silicone grease, is provided in the isolation groove. This not only improves the insulation performance of the first region 100 and the second region 200, but also improves the heat dissipation performance of the circuit board.

[0047] In one embodiment, the isolation device 3 is provided on the isolation belt 300. In this embodiment, the isolation device 3 can select different types of isolation devices 3 according to the number and type of signals, such as optocoupler devices, magnetic coupling isolators or digital isolators, to meet different isolation requirements. The position of the isolation device 3 can be adjusted according to the actual wiring requirements of the circuit board to optimize the signal path and reduce electromagnetic interference, while ensuring the compactness and rationality of the circuit board layout. The setting of the isolation device 3 isolates the signal of the first area 100 from the signal of the second area 200, so that the signals do not interfere with each other, thereby improving the safety and reliability of the servo drive product and thus enhancing the user experience.

[0048] In actual applications, the isolation zone 300 and the isolation device 3 set between the first area 100 and the second area 200 can physically isolate the strong current components and the weak current components, improve the interference problem of strong current signals on weak current signals when strong current and weak current components are mixedly arranged on the circuit board, provide a better environment for weak current control, thereby improving the control accuracy and enhancing the safety and reliability of the servo drive.

[0049] In one embodiment, the isolation strip 300 is located at a diagonal position of the circuit board. It is understood that arranging the isolation strip 300 at a diagonal position of the circuit board allows the wiring of high-voltage components and low-voltage components to be routed along the edge of the circuit board, thereby reducing crossing and overlapping and further reducing the risk of interference.

[0050] In one embodiment, reference Figure 2 The first region 100 includes a first sub-region 110, a second sub-region 120, and a third sub-region 130. The first sub-region 110 is arranged at an edge of the first side surface of the circuit board, the third sub-region 130 is arranged at an edge of the second side surface of the circuit board, and the second sub-region 120 is arranged between the first sub-region 110 and the third sub-region 130.

[0051] And / or, the second region 200 includes a fourth sub-region 210, a fifth sub-region 220, and a sixth sub-region 230, the fourth sub-region 210 is arranged at an edge of the third side surface of the circuit board, the fifth sub-region 220 is arranged at an edge of the fourth side surface of the circuit board; and the sixth sub-region 230 is arranged near the isolation zone 300;

[0052] The first sub-area 110 is the area for high-voltage protection circuits, which can be equipped with circuits such as a soft start circuit and a filter circuit 17 to protect components on the circuit board. The second sub-area 120 is the area for power conversion circuits, which can be equipped with a PIM module and bus capacitors 13 responsible for power conversion and control. The third sub-area 130 is the area for power processing circuits, which can be equipped with switching power supplies, power transformers, etc. for processing and distributing power. The fourth sub-area 210 is the area for low-voltage protection circuits, which can be equipped with a safe torque off interface 21 (STO interface) and a fan 22 to reduce the impact of high-voltage interference on low-voltage signals. For example, the fan 22 is used to reduce the impact of overheating on electronic components in this area, resulting in performance degradation or damage. The fifth sub-area 220 is the area for communication circuits, which includes various interfaces such as a debugging interface 25, a communication interface 26, an external input / output interface 28, and an encoder interface 29 for exchanging data with other external devices. The sixth sub-area 230 is the control circuit 24 layout area, which can be provided with a control circuit 24, etc. The components in the control circuit 24 layout area need to be protected to reduce the interference of high-voltage components thereon. Therefore, the sixth sub-area 230 can be set close to the isolation zone 300 to protect the components in the sixth sub-area 230.

[0053] In one embodiment, the strong electric components include one or more combinations of the following: strong electric terminals 18, power transformers, power integrated modules 12, bus capacitors 13, brake relays 14, brake resistors 15, soft start circuits and filter circuits 17;

[0054] Among them, reference Figure 3 In one embodiment, the high-voltage terminal 18, the brake relay 14, the brake resistor 15, the soft start circuit and the filter circuit 17 are arranged in the first sub-area 110, the power integration module 12 and the bus capacitor 13 are arranged in the second sub-area 120, and the power transformer is arranged in the third sub-area 130.

[0055] In this embodiment, the first sub-area 110 is located at the bottom edge of the circuit board and is provided with a high-voltage terminal 18 for connecting an external power supply and a load, as well as a brake relay 14 and a brake resistor 15, which together constitute a brake circuit for quickly releasing the kinetic energy of the motor when the servo drive stops working. In addition, a soft start circuit and a filter circuit 17 are provided to provide smooth starting characteristics and reduce electromagnetic interference. The second sub-area 120 is located in the middle of the circuit board and is provided with a power integrated module 12 (PIM module) and a bus capacitor 13. The PIM module is responsible for power conversion and control, while the bus capacitor 13 is used to stabilize the DC voltage and reduce voltage fluctuations. The third sub-area 130 is located at another edge of the circuit board and is provided with an auxiliary power transformer 11, which can, for example, convert external input AC power into low-voltage AC or DC power suitable for use in the internal circuit of the servo drive.

[0056] Optionally, the weak current components include one or more of the following combinations: a safe torque interrupt interface 21, a fan 22, a display button 23, a control circuit 24, a debugging interface 25, a communication interface 26, a temperature detection unit 27, an external input and output IO interface 28, and an encoder interface 29;

[0057] The safe torque interrupt interface 21 and the fan 22 are arranged in the fourth sub-area 210, the display button 23, the debugging interface 25, the communication interface 26, the external input and output IO interface 28 and the encoder interface 29 are arranged in the fifth sub-area 220, and the control circuit 24 and the temperature detection unit 27 are arranged in the sixth sub-area 230.

[0058] In this embodiment, the fourth sub-area 210 is located at the top edge of the circuit board relative to the first sub-area 110. This area houses the weak current protection circuit, including a safe torque off interface 21 (STO interface) and a fan 22, for emergency safety shutdown and device cooling. The fifth sub-area 220, located on the other side of the circuit board, houses the communication circuit, including a display button 23, a debug interface 25, a communication interface 26, an external input / output interface 28, and an encoder interface 29. These interfaces are responsible for controlling, monitoring, and transmitting data to the servo drive. The sixth sub-area 230, located at the center of the second area 200 and near the isolation zone 300, houses the control circuit 24 (e.g., a main control chip) and a temperature detection unit 27 (NTC). The main control chip is used to receive external commands and feedback signals and generate corresponding control commands to adjust the operating status of the servo drive. The NTC is used to monitor the temperature of key components, such as the PIM module. In this way, the main control chip can take timely cooling measures according to the temperature monitored in real time by the NTC, such as starting the fan 22 or adjusting the working mode of the servo drive, thereby reducing the risk of component damage due to excessive temperature.

[0059] By the above-mentioned arrangement, strong electric components and weak electric components are isolated through isolation tape 300, which reduces signal interference and improves the stability and reliability of servo drive operation. Meanwhile, the present application adopts the method of three-sided outlet, and strong electric terminal 18 is designed at the bottom of the circuit board, which is convenient for the configuration of external cables; The STO interface and debugging interface 25, communication interface 26, external IO interface, encoder interface 29 of the weak electric part are divided into the edge positions of the different sides of the circuit board, which improves user convenience and the flexibility and scalability of the product. In addition, the cooling system (such as fan 22) is arranged in the weak electric part to ensure the accuracy of the main control chip operation.

[0060] In one embodiment, reference Figure 3 The servo drive includes a radiator, and the radiator includes a first mounting surface and a second mounting surface. The first mounting surface is arranged close to the circuit board, and the second mounting surface is arranged away from the circuit board. The power integrated module 12 is arranged on the second mounting surface.

[0061] In this embodiment, the power integrated module 12 (PIM module) is a critical heat-generating component in the servo drive. To improve the servo drive's heat dissipation performance, the PIM module is mounted on a heat sink's second mounting surface, away from the circuit board. This allows heat generated by the PIM module to be directly transferred to the heat sink and dissipated outward through the second mounting surface, preventing heat accumulation on the circuit board. Alternatively, the heat sink can be made of a material with high thermal conductivity and heat dissipation properties, such as aluminum alloy, aluminum oxide (Al2O3), or aluminum nitride (AlN) ceramic, to ensure good thermal conductivity. Furthermore, placing the power integrated module 12 on the heat sink reduces the number of components on the circuit board, simplifies the layout, and reduces the board's footprint.

[0062] In this embodiment, the power integration module 12 can select modules of different package sizes according to power requirements. Figure 4 As shown in the figure, when the power of the servo drive is small, a smaller package module should be selected, such as Figure 5 As shown in the figure, when the servo drive power is larger, a larger package module is used.

[0063] In combination with the above embodiments, components that are prone to heat generation are arranged in the first area 100, and components that generate less heat are arranged in the second area 200, thereby distinguishing between the heat-generating area and the non-heat-generating area, which is beneficial to thermal design and thus improves the stability and reliability of the product.

[0064] In another embodiment, the servo drive includes a bus, a main power supply and an auxiliary power supply, and the main power supply and the auxiliary power supply are electrically connected to the bus, respectively.

[0065] The auxiliary power supply includes a control power supply and a driving power supply. The control power supply is provided in the fourth sub-area 210 , and the driving power supply is provided in the third sub-area 130 .

[0066] In this embodiment, the main power supply is responsible for providing high-power electrical energy to the servo drive. The main power supply is connected to the components on the circuit board via a busbar, ensuring efficient power transmission. The auxiliary power supply is divided into two parts: a control power supply and a driver power supply, each of which provides power to different functional areas on the circuit board. The control power supply can include a 5V control power supply 41 and a 24V control power supply 42, each of which is used to provide power at different voltage levels. The control power supply is located in the fourth sub-area 210, the weak current protection circuit layout area. The control power supply can power the main control chip, communication circuits, and other components. The driver power supply is located in the third sub-area 130, the power processing circuit layout area. The driver power supply is specifically used to provide power for power conversion circuits, such as those driving the PIM module. Optionally, in this embodiment, the driver power supply can be placed close to the power conversion circuit to reduce circuit losses. The main and auxiliary power supplies are electrically connected via the same busbar, such as when the auxiliary power supply is electrically connected to the main power busbar. This eliminates the need for a separate rectifier circuit and input electrolytic capacitor for the auxiliary power supply, simplifying the circuit design, reducing the number of control power components, reducing the circuit board footprint, and lowering the overall cost.

[0067] In this embodiment, the layout of the control power supply and the driving power supply on the circuit board is independent. The driving power supply is set in the first area 100, and the control power supply is set in the second area 200, which are responsible for powering the high-current components and the low-current components respectively. This helps to isolate circuits of different voltage levels and improve reliability and safety.

[0068] In an embodiment of the present application, the power integration module 12 includes an inverter circuit, and a driving power supply is electrically connected to the inverter circuit to drive the inverter circuit to operate.

[0069] There are multiple driving power supplies, the inverter circuit includes a full-bridge inverter circuit, and the multiple driving power supplies are electrically connected to the multiple switching tubes of the full-bridge inverter circuit in a one-to-one correspondence.

[0070] In this embodiment, the inverter circuit is the core component of the servo drive, responsible for converting direct current into alternating current to drive the motor. In this embodiment, the inverter circuit adopts a full-bridge inverter circuit, which is composed of multiple switching transistors. The driving power supply is used to output driving signals to the switching transistors in the inverter circuit, controlling the on and off states of the multiple switching transistors. In this embodiment, the driving power supply includes U, V, and W upper bridge driving power supplies 43 and lower bridge driving power supplies 44, each of which is electrically connected to a different switching transistor in the full-bridge inverter circuit. In this way, the switching transistors have their own dedicated driving power supplies. Separate power supplies can provide stable driving signals to the switching transistors, avoid mutual interference of driving signals, and thus improve the overall performance of the inverter circuit. Among them, the U, V, and W upper bridge driving power supplies 43 can be flexibly adjusted in order according to the actual wiring.

[0071] It should be noted that the upper-side switching transistors of the inverter circuit are typically subject to high voltage stress. Since the upper-side switching transistors require rapid current changes during their on- and off-state processes, this can cause transient voltage spikes and current surges. Therefore, using a separate power supply for the upper-side switching transistors of the inverter circuit can provide more stable voltage and current, helping to reduce switching losses and improve efficiency. A separate power supply can optimize the current loop, reduce electromagnetic interference, and improve the system's electromagnetic compatibility (EMC). Furthermore, a separate power supply path helps isolate electromagnetic interference in the upper-side circuit, preventing it from adversely affecting other circuit components. In other words, the separate power supply provided by multiple driver power supplies changes the current loop in the high-voltage area, reducing both internal and external interference, and improving EMC performance.

[0072] Optionally, in one embodiment, the isolation device 3 includes an optocoupler device, a first end of the optocoupler device is electrically connected to the control circuit 24 , and a second end of the optocoupler device is electrically connected to the power integration module 12 .

[0073] In this embodiment, an optocoupler is used to achieve electrical signal isolation. For example, the isolation device 3 is located near the control circuit 24 and the power integrated circuit 12. The optocoupler can isolate the signals between the control circuit 24 and the power integrated circuit to reduce interference from the power integrated circuit's electrical signals on the control circuit 24. Furthermore, the proximity of the optocoupler to the control circuit 24 and the PIM module ensures rapid signal transmission.

[0074] Through the above-described configuration, the use of isolation device 3 effectively reduces the damage to control circuit 24 caused by voltage and current signals, improving safety and reliability. Furthermore, a reasonable layout of isolation device 3 can reduce signal distortion and delay, ensuring signal integrity and accuracy, thereby improving the performance and response speed of the servo drive. The flexible layout of isolation device 3 and the selectable isolation types make the circuit board design highly flexible and scalable, adapting to the needs of different application scenarios.

[0075] The above description is merely an optional embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application description and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the scope of the present application.

Claims

1. A servo drive, characterized in that: It includes strong current components, weak current components and circuit boards, and the circuit boards include: The first area is for the installation of high-voltage components; The second area is for the installation of weak current components; The first area and the second area are isolated by an isolation zone; the isolation zone is provided with an insulating area and an isolation device.

2. The servo driver according to claim 1, wherein: The isolation strip is located at a diagonal position of the circuit board.

3. The servo driver according to claim 1, wherein: The first region includes a first sub-region, a second sub-region, and a third sub-region, wherein the first sub-region is arranged at an edge position of the first side surface of the circuit board, the third sub-region is arranged at an edge position of the second side surface of the circuit board, and the second sub-region is arranged between the first sub-region and the third sub-region; And / or, the second region includes a fourth sub-region, a fifth sub-region, and a sixth sub-region, the fourth sub-region is arranged at an edge position of the third side surface of the circuit board, the fifth sub-region is arranged at an edge position of the fourth side surface of the circuit board; and the sixth sub-region is arranged near the isolation zone; Among them, the first sub-area is the high-current protection circuit layout area, the second sub-area is the power conversion circuit layout area, the third sub-area is the power processing circuit layout area; the fourth sub-area is the low-current protection circuit layout area; the fifth sub-area is the communication circuit layout area, and the sixth sub-area is the control circuit layout area.

4. The servo driver according to claim 1, wherein: The strong electric components include one or more combinations of the following: strong electric terminals, power transformers, power integrated modules, bus capacitors, brake relays, brake resistors, soft start circuits and filter circuits; Among them, the high-voltage terminal, the brake relay, the brake resistor, the soft start circuit and the filter circuit are arranged in the first sub-area, the power integration module and the bus capacitor are arranged in the second sub-area, and the power transformer is arranged in the third sub-area.

5. The servo driver according to claim 1, wherein: The weak current components include one or more of the following combinations: safe torque interrupt interface, fan, display button, control circuit, debugging interface, communication interface, temperature detection unit, external input and output IO interface, encoder interface; The safe torque interrupt interface and the fan are arranged in the fourth sub-area, the display button, the debugging interface, the communication interface, the external input and output IO interface and the encoder interface are arranged in the fifth sub-area, and the control circuit and the temperature detection unit are arranged in the sixth sub-area.

6. The servo driver according to claim 1, wherein: The servo driver includes a busbar, a main power supply and an auxiliary power supply, and the main power supply and the auxiliary power supply are electrically connected to the busbar respectively.

7. The servo driver according to claim 6, wherein: The auxiliary power supply includes a control power supply and a driving power supply. The control power supply is arranged in the fourth sub-area, and the driving power supply is arranged in the third sub-area.

8. The servo driver according to claim 4, wherein: The power integration module includes an inverter circuit, and a driving power supply is electrically connected to the inverter circuit for driving the inverter circuit to operate.

9. The servo driver according to claim 8, wherein: There are multiple driving power supplies, the inverter circuit includes a full-bridge inverter circuit, and the multiple driving power supplies are electrically connected to the multiple switching tubes of the full-bridge inverter circuit in a one-to-one correspondence.

10. The servo driver according to claim 1, wherein: The isolation device includes an optocoupler device, a first end of the optocoupler device is electrically connected to the control circuit, a second end of the optocoupler device is electrically connected to the power integration module, and the isolation device is arranged close to the control circuit and the power integration module.

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