Driver control board layout structure

Abstract

The present invention discloses a driver control board layout structure, including a circuit board and a sampling module, a comparison module, an overcurrent detection module, a current detection module, a control module, a driver docking terminal and a control module docking terminal arranged on the circuit board; the circuit board is divided into a sampling area, a current processing area and a control area, the sampling area and the current processing area are arranged in sequence along a first direction, the driver docking terminal is located on one side of the sampling area and is arranged close to the edge of the circuit board, and the control module docking terminal is arranged close to the edge of the circuit board; the control area and the current processing area are arranged in sequence along a second direction or the sampling area, the current processing area and the control area are arranged in sequence along the first direction. According to the driver control board layout structure of the present invention, the wiring is reasonable, the signal interference can be avoided to cause inaccurate data collection, the current segmentation boundary is clear, the current signal can be unaffected in a limited space, the control ability of the driver is improved, and the control is more precise.

Description

Technical Field

[0001] The invention belongs to the technical field of PCB layout, and in particular relates to a driver control board layout structure. Background Art

[0002] The servo motor driver is a controller used to drive and control the servo motor and is part of the servo system. The servo motor driver receives the command signal from the control system and transmits current to the servo motor to generate motion proportional to the command signal. The servo motor driver usually controls the position, speed, torque and other parameters of the servo motor to achieve high-precision positioning of the transmission system. Unlike traditional drivers, high-performance drivers require high-speed, high-precision, and high-detail motion control. Its current control loop is set on the control board, and the data acquisition calculation of the control board must be accurate to reduce errors and achieve precise control. Existing driver control boards often have problems such as signal interference and data acquisition errors, which make it difficult to meet the requirements of high-performance drivers.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a driver control board layout structure to reduce signal interference and data acquisition errors caused by layout and wiring interference, thereby making the control more precise.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the present invention provides a driver control board layout structure, including a circuit board and a sampling module, a comparison module, an overcurrent detection module, a current detection module, a control module, a driver docking terminal and a control module docking terminal arranged on the circuit board; the circuit board is divided into a sampling area, a current processing area and a control area, the sampling area and the current processing area are arranged in sequence along a first direction, the driver docking terminal is located on one side of the sampling area and is arranged close to the edge of the circuit board, and the control module docking terminal is arranged close to the edge of the circuit board; the control area and the current processing area are arranged in sequence along a second direction or the sampling area, the current processing area and the control area are arranged in sequence along the first direction; the sampling module is located in the sampling area, the sampling module is connected to the driver docking terminal to sample W, V, U phase alternating current, the control module is located in the control area, the comparison module, the overcurrent detection module and the current detection module are all located in the current processing area, the sampling module is connected to the comparison module, the overcurrent detection module and the current detection module, the comparison module, the overcurrent detection module and the current detection module are connected to the control module, and the control module is connected to the driver docking terminal and the control module docking terminal.

[0006] In one or more embodiments of the present invention, the sampling module includes a W-phase sampling module, a V-phase sampling module and a U-phase sampling module arranged side by side, and the W-phase sampling module, the V-phase sampling module and the U-phase sampling module are all connected to the driver docking terminal to sample the W, V, and U-phase alternating current respectively.

[0007] In one or more embodiments of the present invention, the comparison module includes a W-phase comparison module, a V-phase comparison module and a U-phase comparison module, the overcurrent detection module includes a W-phase overcurrent detection module, a V-phase overcurrent detection module and a U-phase overcurrent detection module, and the current detection module includes a V-phase current detection module and a U-phase current detection module; the current processing area is divided into a W-phase current processing area, a V-phase current processing area, a U-phase current processing area and a current detection area, and the W-phase comparison module and the W-phase overcurrent detection module are arranged side by side in the W-phase current processing area and with the W-phase The sampling module is connected to the control module, the V-phase comparison module and the V-phase overcurrent detection module are arranged side by side in the V-phase current processing area and are connected to the V-phase sampling module and the control module, the U-phase comparison module and the U-phase overcurrent detection module are arranged side by side in the U-phase current processing area and are connected to the U-phase sampling module and the control module, the V-phase current detection module and the U-phase current detection module are arranged side by side in the current detection area, the V-phase current detection module is connected to the V-phase sampling module and the control module, and the U-phase current detection module is connected to the U-phase sampling module and the control module.

[0008] In one or more embodiments of the present invention, the W-phase sampling module includes a sampling resistor, a first voltage follower, a first amplifier circuit and a second voltage follower that are connected and arranged in sequence, the sampling resistor is connected to the driver docking terminal, and the second voltage follower is connected to the W-phase comparison module and the W-phase overcurrent detection module; the structures of the V-phase sampling module and the U-phase sampling module are the same as those of the W-phase sampling module, the sampling resistor of the V-phase sampling module and the sampling resistor of the U-phase sampling module are both connected to the driver docking terminal, the second voltage follower of the V-phase sampling module is connected to the V-phase comparison module, the V-phase overcurrent detection module and the V-phase current detection module, and the second voltage follower of the U-phase sampling module is connected to the U-phase comparison module, the U-phase overcurrent detection module and the U-phase current detection module.

[0009] In one or more embodiments of the present invention, the W-phase comparison module includes a first comparator and an instruction current processing unit that are connected and arranged in sequence, the first comparator is connected to the W-phase sampling module, the first comparator and the instruction current processing unit are both connected to the control module, the structure of the V-phase comparison module and the U-phase comparison module is the same as that of the W-phase comparison module, the first comparator of the V-phase comparison module is connected to the V-phase sampling module, the first comparator of the U-phase comparison module is connected to the U-phase sampling module, the first comparator of the V-phase comparison module and the instruction current processing unit, the first comparator of the U-phase comparison module and the instruction current processing unit, the first comparator of the U-phase comparison module and the instruction current processing unit are all connected to the control module.

[0010] In one or more embodiments of the present invention, the W-phase overcurrent detection module includes an absolute value circuit and a second comparator that are connected and arranged in sequence, the absolute value circuit is connected to the W-phase sampling module, the second comparator is connected to the control module, the structures of the V-phase overcurrent detection module and the U-phase overcurrent detection module are the same as those of the W-phase overcurrent detection module, the absolute value circuit of the V-phase overcurrent detection module is connected to the V-phase sampling module, the absolute value circuit of the U-phase overcurrent detection module is connected to the U-phase sampling module, and the second comparator of the V-phase overcurrent detection module and the second comparator of the U-phase overcurrent detection module are both connected to the control module.

[0011] In one or more embodiments of the present invention, the V-phase current detection module includes a bias amplifier, an inverting amplifier and an analog-to-digital converter that are connected and arranged in sequence, the bias amplifier is connected to the V-phase sampling module, the analog-to-digital converter is connected to the control module, the structure of the U-phase current detection module is the same as that of the V-phase current detection module, the bias amplifier of the U-phase current detection module is connected to the U-phase sampling module, and the analog-to-digital converter of the U-phase current detection module is connected to the control module.

[0012] In one or more embodiments of the present invention, the distance between two adjacent modules among the W-phase comparison module, V-phase comparison module, U-phase comparison module, W-phase overcurrent detection module, V-phase overcurrent detection module, U-phase overcurrent detection module, V-phase current detection module and U-phase current detection module is not less than 20 mil.

[0013] In one or more embodiments of the present invention, the control board further includes one or more of a buffer chip, a clock chip, and a differential signal conversion module which are arranged on the circuit board and connected to the control module.

[0014] In one or more embodiments of the present invention, the passive components in the sampling module, the comparison module, the overcurrent detection module, the current detection module and the control module are arranged on the back side of the circuit board.

[0015] Compared with the prior art, the layout structure and wiring of the driver control board of the present invention are reasonable, which can avoid signal interference causing inaccurate data collection, make the current segmentation boundary clear, and make the current signal unaffected in a limited space, thereby improving the control ability of the driver and making the control more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 FIG. 4 is a layout diagram of a driver control board in one embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0019] "Coupled" or "connected" or "connected" in the specification includes both direct connection and indirect connection. Indirect connection is a connection through an intermediate medium, such as a connection through an electrically conductive medium, which may have parasitic inductance or parasitic capacitance; indirect connection may also include connection through other active or passive devices on the basis of achieving the same or similar functional purposes, such as connection through circuits or components such as switches and follower circuits. In addition, in the invention, words such as "first" and "second" are mainly used to distinguish one technical feature from another technical feature, and do not necessarily require or imply that there is a certain actual relationship, quantity or order between these technical features.

[0020] like Figure 1 As shown, the layout structure of the driver control board in one embodiment of the present invention includes a circuit board 10 and a sampling module, a comparison module, an overcurrent detection module, a current detection module, a control module, a driver docking terminal 11 and a control module docking terminal 12 arranged on the circuit board 10.

[0021] The circuit board 10 is divided into a sampling area 13, a current processing area 14 and a control area 15. The sampling area 13 and the current processing area 14 are arranged in sequence along the first direction, the driver docking terminal 11 is located on one side of the sampling area 13 and is arranged close to the edge of the circuit board 10, and the control module docking terminal 12 is arranged close to the edge of the circuit board 10.

[0022] In one embodiment, Figure 1 The Y axis is the first direction, and the X axis is the second direction. In other embodiments, the X axis can be the first direction, and the Y axis can be the second direction.

[0023] In one embodiment, if Figure 1 As shown, the control area 15 and the current processing area 14 are sequentially arranged along the second direction. In other embodiments, the sampling area 13, the current processing area 14 and the control area 15 can be sequentially arranged along the first direction.

[0024] The sampling module is located in the sampling area 13, and the sampling module is connected to the driver docking terminal to sample the W, V, and U phase alternating current. The control module is located in the control area 15. The comparison module, the overcurrent detection module, and the current detection module are all located in the current processing area 14. The sampling module is connected to the comparison module, the overcurrent detection module, and the current detection module. The comparison module, the overcurrent detection module, and the current detection module are connected to the control module. The control module is connected to the driver docking terminal and the control module docking terminal.

[0025] Among them, the sampling module includes a W-phase sampling module, a V-phase sampling module and a U-phase sampling module arranged side by side. The W-phase sampling module, the V-phase sampling module and the U-phase sampling module are all connected to the driver docking terminals to sample the W, V, U-phase alternating currents I_W, I_V and I_U respectively, and the three-phase alternating currents are respectively sampled and converted to obtain corresponding voltage values, and then the voltages are respectively transmitted to the comparison module, the overcurrent detection module and the current detection module for comparison and detection processing, and then the control module analyzes the comparison and detection results and controls the driver.

[0026] Specifically, the comparison module includes a W-phase comparison module, a V-phase comparison module and a U-phase comparison module, the overcurrent detection module includes a W-phase overcurrent detection module, a V-phase overcurrent detection module and a U-phase overcurrent detection module, and the current detection module includes a V-phase current detection module and a U-phase current detection module.

[0027] like Figure 1As shown, the current processing area 14 is divided into a W-phase current processing area, a V-phase current processing area, a U-phase current processing area and a current detection area. The W-phase comparison module and the W-phase overcurrent detection module are arranged side by side in the W-phase current processing area and are connected to the W-phase sampling module and the control module, the V-phase comparison module and the V-phase overcurrent detection module are arranged side by side in the V-phase current processing area and are connected to the V-phase sampling module and the control module, the U-phase comparison module and the U-phase overcurrent detection module are arranged side by side in the U-phase current processing area and are connected to the U-phase sampling module and the control module, the V-phase current detection module and the U-phase current detection module are arranged side by side in the current detection area, the V-phase current detection module is connected to the V-phase sampling module and the control module, and the U-phase current detection module is connected to the U-phase sampling module and the control module.

[0028] Among them, the comparison module compares the three-phase alternating current with the command current respectively. According to the comparison result, the control module sends a signal which is transmitted to the driver through the driver docking terminal 11 to control the corresponding switch of the driver, so that the motor rotation changes, thereby realizing a complete closed-loop current control logic.

[0029] The overcurrent detection module is used to detect whether the three-phase AC current exceeds the set threshold. If it exceeds the threshold, the signal is transmitted to the control module, and the control module then controls the corresponding module or device to issue an alarm.

[0030] The current detection module is used to detect the magnitude of the three-phase current. Since the sum of the three-phase current is 0, the current magnitude of the W phase can be calculated based on the current magnitudes of the V phase and the U phase, so there is no need to set up a W phase current detection module. After the current detection module passes the data to the control module, the control module stores the data for subsequent retrospective viewing. In other embodiments, any other two-phase or three-phase current detection modules can also be set.

[0031] like Figure 1 As shown, in one embodiment, the driver docking terminal 11 is located at the lower left of the circuit board 10, and the W-phase current pin, V-phase current pin and U-phase current pin on the driver docking terminal 11 are all located on the right side of the driver docking terminal 11 and are arranged in sequence from top to bottom. The sampling modules are all arranged on the right side of the driver docking terminal 11, and are arranged in the order of W-phase sampling module, V-phase sampling module, and U-phase sampling module from left to right. The W-phase current processing area, the V-phase current processing area, and the U-phase current processing area are also arranged in sequence from left to right, respectively close to the corresponding sampling modules. The current detection area is set on the right side of the U-phase current processing area, which is relatively far away from the sampling module. The comparison module of each phase is set on the left side of the overcurrent detection module of the same phase, and the V-phase current detection module is set on the left side of the U-phase current detection module.

[0032] In other embodiments, the driver docking terminal 11 can be set at other edges of the circuit board, and the arrangement order of the W-phase current pin, the V-phase current pin and the U-phase current pin on the driver docking terminal 11 can be changed, or they can be set on different sides of the driver docking terminal 11. Similarly, the arrangement order of the W-phase sampling module, the V-phase sampling module and the U-phase sampling module can also be changed, or they can be respectively set on different sides of the driver docking terminal 11. The specific distribution of the three sampling modules can be determined according to the specific positions of the W-phase current interface, the V-phase current interface and the U-phase current interface on the driver docking terminal 11, and a clear and reasonable layout method that is convenient for wiring can be selected. The order of the W-phase current processing area, the V-phase current processing area and the U-phase current processing area can be adjusted accordingly with the specific layout of the W-phase sampling module, the V-phase sampling module and the U-phase sampling module.

[0033] When laying out the driver control board, the circuits of the modules that sample the three-phase AC and compare the three-phase AC and the command current have a higher layout priority, because if these signals are interfered with and the data is inaccurate, it will lead to inaccurate feedback control and seriously affect the driver control capability. This application minimizes the length of the wiring path from the driver docking terminal 11, through the sampling module to the comparison module, by setting the sampling module close to the driver docking terminal and the comparison module close to the sampling module, thereby avoiding electromagnetic interference on the signal on the line, resulting in data collection errors, and making the control of the driver more precise.

[0034] The next priority is the overcurrent detection module. By arranging the overcurrent detection module adjacent to the comparison module, the path length of the signal reaching the overcurrent detection module is only slightly longer than the path length reaching the comparison module, which can also achieve the effect of preventing the signal from being affected by electromagnetic interference.

[0035] Compared with the comparison module and the overcurrent detection module, the current detection module does not require very high anti-interference performance. Placing the two current detection modules at a location far away from the sampling module can make way for the comparison module and the overcurrent detection module, giving priority to the anti-interference needs of the comparison module and the overcurrent detection module.

[0036] The distance between two adjacent modules among the W-phase comparison module, the V-phase comparison module, the U-phase comparison module, the W-phase overcurrent detection module, the V-phase overcurrent detection module, the U-phase overcurrent detection module, the V-phase current detection module and the U-phase current detection module is not less than 20 mil. Preferably, the distance between the W-phase comparison module and the W-phase overcurrent detection module, between the W-phase overcurrent detection module and the V-phase comparison module, between the V-phase comparison module and the U-phase comparison module, between the U-phase comparison module and the V-phase overcurrent detection module, between the V-phase overcurrent detection module and the U-phase overcurrent detection module, between the U-phase overcurrent detection module and the V-phase current detection module, and between the V-phase current detection module and the U-phase current detection module are all not less than 20 mil to ensure that the signals are not interspersed and the segmentation is clear.

[0037] In addition, in other embodiments, considering the layout of the power layer of the circuit board, since each module needs to be set near the power required by the devices in the module, under the layout constraints of the power layer, the positions of the comparison module and the overcurrent detection module of the same phase can also be interchanged. Because in actual routing, the difference in the path length of the signal after the two modules are interchanged will not be particularly large, and the expected effect can be achieved.

[0038] like Figure 1 As shown, in one embodiment, the control area 15 is located on the right side of the current processing area 14. Since the structure and size of the driver itself and other factors determine the shape and space of the circuit board, when the sampling area 13 and the current processing area 14 are laid out, only the right side of the circuit board has remaining space, so the control area 15 is set on the right side of the current processing area 14. In other embodiments, if there is still space above the circuit board, the control area 15 should be set above the current processing area 14, which can further shorten the wiring length between the control module and the comparison module, the overcurrent detection module and the current detection module, and improve the anti-interference ability.

[0039] like Figure 1 As shown, the W-phase sampling module includes a sampling resistor, a first voltage follower, a first amplifier circuit and a second voltage follower which are connected and arranged in sequence. The sampling resistor is connected to the driver docking terminal, and the second voltage follower is connected to the W-phase comparison module and the W-phase overcurrent detection module.

[0040] The structures of the V-phase sampling module and the U-phase sampling module are the same as those of the W-phase sampling module. The sampling resistors of the V-phase sampling module and the U-phase sampling module are both connected to the driver docking terminals. The second voltage follower of the V-phase sampling module is connected to the V-phase comparison module, the V-phase overcurrent detection module and the V-phase current detection module. The second voltage follower of the U-phase sampling module is connected to the U-phase comparison module, the U-phase overcurrent detection module and the U-phase current detection module.

[0041] Among them, the sampling resistor is used to generate a sampling voltage based on the three-phase currents I_W, I_V and I_U transmitted by the driver. The first amplifier circuit amplifies the sampling voltage to a suitable voltage range (preferably -10 to 10V) and then transmits it to the comparison module, the overcurrent detection module and the current detection module. A voltage follower is set before and after the first amplifier circuit for buffering and isolating the circuit to avoid mutual influence between the front and rear stage circuits.

[0042] The W-phase comparison module includes a first comparator and an instruction current processing unit that are connected and arranged in sequence. The first comparator is connected to the W-phase sampling module. The first comparator and the instruction current processing unit are both connected to the control module. The structures of the V-phase comparison module and the U-phase comparison module are the same as those of the W-phase comparison module. The first comparator of the V-phase comparison module is connected to the V-phase sampling module, and the first comparator of the U-phase comparison module is connected to the U-phase sampling module. The first comparator of the V-phase comparison module and the instruction current processing unit, and the first comparator of the U-phase comparison module and the instruction current processing unit are all connected to the control module.

[0043] Among them, the command current processing unit is used to receive the command current generated by the control module and process it, converting the command current into a voltage in the corresponding interval (the same as the sampling voltage, preferably -10~10V), and comparing the voltage with the sampling voltage generated by the sampling module through the first comparator. The control module then controls the driver according to the comparison result to achieve complete closed-loop current control.

[0044] The W-phase overcurrent detection module includes an absolute value circuit and a second comparator that are connected and arranged in sequence. The absolute value circuit is connected to the W-phase sampling module, and the second comparator is connected to the control module. The structures of the V-phase overcurrent detection module and the U-phase overcurrent detection module are the same as those of the W-phase overcurrent detection module. The absolute value circuit of the V-phase overcurrent detection module is connected to the V-phase sampling module, and the absolute value circuit of the U-phase overcurrent detection module is connected to the U-phase sampling module. The second comparator of the V-phase overcurrent detection module and the second comparator of the U-phase overcurrent detection module are both connected to the control module.

[0045] The absolute value circuit is used to take the absolute value of the sampling voltage within the positive and negative range generated by the sampling module. The second comparator then compares the sampling voltage after taking the absolute value with the set threshold voltage. If it exceeds the threshold, the signal is transmitted to the control module, and the control module then controls the corresponding module or device to issue an alarm.

[0046] The V-phase current detection module includes a bias amplifier, an inverting amplifier and an analog-to-digital converter which are connected and arranged in sequence. The bias amplifier is connected to the V-phase sampling module, and the analog-to-digital converter is connected to the control module. The structure of the U-phase current detection module is the same as that of the V-phase current detection module. The bias amplifier of the U-phase current detection module is connected to the U-phase sampling module, and the analog-to-digital converter of the U-phase current detection module is connected to the control module. The bias amplifier and the inverting amplifier amplify the sampled voltage, and then the analog-to-digital converter converts it into a digital signal and transmits it to the control module for storage.

[0047] In the sampling module, comparison module, overcurrent detection module and current detection module, each sub-circuit is set according to the direction of current or signal transmission, ensuring clear routing, shortest distance, uniform distribution of devices, and effectively avoiding signal interference.

[0048] In one embodiment, the control board further comprises a buffer chip, a clock chip and a differential signal conversion module connected to the control module. The control module docking terminal 12 comprises a download interface for downloading control module data and a controller signal docking terminal for signal docking with the controller.

[0049] The clock chip and the differential signal conversion module are arranged between the control module and the controller signal docking terminal. Two buffer chips are arranged respectively between the control module and the driver docking terminal 11, and between the control module and the comparison module, the overcurrent detection module and the current detection module, for buffering the data and signals received by the control module.

[0050] In one embodiment, the passive components in the sampling module, the comparison module, the overcurrent detection module, the current detection module, and the control module are arranged on the back of the circuit board 10. The entire control board is double-sided, with large components and chips placed on the front, and small components such as capacitors, resistors, and inductors placed on the back, which can make the circuit layout more compact, reduce the size of the circuit board, and improve the overall performance. In other embodiments, some small components can also be placed on the front of the circuit board 10, and some chips can also be placed on the back of the circuit board 10, which can be flexibly arranged according to the actual routing and manufacturing process.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A driver control board layout structure, characterized in that: It includes a circuit board and a sampling module, a comparison module, an overcurrent detection module, a current detection module, a control module, a driver docking terminal and a control module docking terminal arranged on the circuit board; The circuit board is divided into a sampling area, a current processing area and a control area, the sampling area and the current processing area are arranged in sequence along a first direction, the driver docking terminal is located on one side of the sampling area and is arranged close to the edge of the circuit board, and the control module docking terminal is arranged close to the edge of the circuit board; The control area and the current processing area are arranged in sequence along the second direction, or the sampling area, the current processing area and the control area are arranged in sequence along the first direction; The sampling module is located in the sampling area, the sampling module is connected to the driver docking terminal to sample the W, V, U phase alternating current, the control module is located in the control area, the comparison module, the overcurrent detection module and the current detection module are all located in the current processing area, the sampling module is connected to the comparison module, the overcurrent detection module and the current detection module, the comparison module, the overcurrent detection module and the current detection module are connected to the control module, and the control module is connected to the driver docking terminal and the control module docking terminal; The sampling module includes a W-phase sampling module, a V-phase sampling module and a U-phase sampling module arranged side by side, and the W-phase sampling module, the V-phase sampling module and the U-phase sampling module are all connected to the driver docking terminal to sample the W-phase, V-phase and U-phase alternating currents respectively; The comparison module includes a W-phase comparison module, a V-phase comparison module and a U-phase comparison module, and the overcurrent detection module includes a W-phase overcurrent detection module, a V-phase overcurrent detection module and a U-phase overcurrent detection module; The current processing area is divided into a W-phase current processing area, a V-phase current processing area, a U-phase current processing area and a current detection area. The W-phase comparison module and the W-phase overcurrent detection module are arranged side by side in the W-phase current processing area and are connected to the W-phase sampling module and the control module. The V-phase comparison module and the V-phase overcurrent detection module are arranged side by side in the V-phase current processing area and are connected to the V-phase sampling module and the control module. The U-phase comparison module and the U-phase overcurrent detection module are arranged side by side in the U-phase current processing area and are connected to the U-phase sampling module and the control module.

2. The driver control board layout structure according to claim 1, characterized in that: The current detection module includes a V-phase current detection module and a U-phase current detection module; The V-phase current detection module and the U-phase current detection module are arranged side by side in the current detection area, the V-phase current detection module is connected to the V-phase sampling module and the control module, and the U-phase current detection module is connected to the U-phase sampling module and the control module.

3. The driver control board layout structure according to claim 2, characterized in that: The W-phase sampling module includes a sampling resistor, a first voltage follower, a first amplifier circuit and a second voltage follower which are connected and arranged in sequence, the sampling resistor is connected to the driver docking terminal, and the second voltage follower is connected to the W-phase comparison module and the W-phase overcurrent detection module; The structures of the V-phase sampling module and the U-phase sampling module are the same as those of the W-phase sampling module. The sampling resistors of the V-phase sampling module and the U-phase sampling module are both connected to the driver docking terminals. The second voltage follower of the V-phase sampling module is connected to the V-phase comparison module, the V-phase overcurrent detection module and the V-phase current detection module. The second voltage follower of the U-phase sampling module is connected to the U-phase comparison module, the U-phase overcurrent detection module and the U-phase current detection module.

4. The driver control board layout structure according to claim 2, characterized in that: The W-phase comparison module includes a first comparator and an instruction current processing unit that are connected and arranged in sequence, the first comparator is connected to the W-phase sampling module, the first comparator and the instruction current processing unit are both connected to the control module, the structures of the V-phase comparison module and the U-phase comparison module are the same as those of the W-phase comparison module, the first comparator of the V-phase comparison module is connected to the V-phase sampling module, the first comparator of the U-phase comparison module is connected to the U-phase sampling module, the first comparator of the V-phase comparison module and the instruction current processing unit, the first comparator of the U-phase comparison module and the instruction current processing unit, the first comparator of the U-phase comparison module and the instruction current processing unit are all connected to the control module.

5. The driver control board layout structure according to claim 2, characterized in that: The W-phase overcurrent detection module includes an absolute value circuit and a second comparator that are connected and arranged in sequence, the absolute value circuit is connected to the W-phase sampling module, the second comparator is connected to the control module, the structures of the V-phase overcurrent detection module and the U-phase overcurrent detection module are the same as those of the W-phase overcurrent detection module, the absolute value circuit of the V-phase overcurrent detection module is connected to the V-phase sampling module, the absolute value circuit of the U-phase overcurrent detection module is connected to the U-phase sampling module, and the second comparator of the V-phase overcurrent detection module and the second comparator of the U-phase overcurrent detection module are both connected to the control module.

6. The driver control board layout structure according to claim 2, characterized in that: The V-phase current detection module includes a bias amplifier, an inverting amplifier and an analog-to-digital converter which are connected and arranged in sequence. The bias amplifier is connected to the V-phase sampling module, and the analog-to-digital converter is connected to the control module. The structure of the U-phase current detection module is the same as that of the V-phase current detection module. The bias amplifier of the U-phase current detection module is connected to the U-phase sampling module, and the analog-to-digital converter of the U-phase current detection module is connected to the control module.

7. The driver control board layout structure according to claim 2, characterized in that: The distance between two adjacent modules among the W-phase comparison module, V-phase comparison module, U-phase comparison module, W-phase overcurrent detection module, V-phase overcurrent detection module, U-phase overcurrent detection module, V-phase current detection module and U-phase current detection module is not less than 20 mil.

8. The driver control board layout structure according to claim 1, characterized in that: The control board also includes one or more of a buffer chip, a clock chip and a differential signal conversion module which are arranged on the circuit board and connected to the control module.

9. The driver control board layout structure according to claim 1, characterized in that: The passive components in the sampling module, the comparison module, the overcurrent detection module, the current detection module and the control module are arranged on the back side of the circuit board.

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