Servo drive test system

Abstract

The utility model relates to the technical field of automatic testing, and discloses a servo drive testing system which comprises a switching power supply module, a control module, a first switching module, a second switching module and a servo drive module. Wherein the switching power supply module comprises an alternating-current power supply port and a direct-current power supply port, the control module is provided with a first output port to output a power-on signal, the first switching module is connected with the direct-current power supply port and the first output port, and the second switching module is connected with the first switching module and the alternating-current power supply port. And the servo driving module is connected with the second switch module so as to synchronously drive the plurality of servo motors to operate under the condition that the second switch module is in a closed state, so that an aging test is carried out. The system can support batch synchronous aging test of multiple servo drivers, remarkably improves the test efficiency, can accurately simulate the operation state of the motor under a real working condition, and facilitates the improvement of the test accuracy.

Description

Technical Field

[0001] This application relates to the field of automated testing technology, and in particular to a servo drive testing system. Background Technology

[0002] Servo drives are core components of automated equipment, and their pre-shipment aging test is a crucial step in ensuring the reliability of motor operation. In related technologies, the servo drive is typically connected to the motor, and aging tests are performed manually on the servo drive under no-load conditions on each motor.

[0003] However, this method cannot perform large-scale servo drive testing and cannot effectively simulate the complex motor operating conditions under actual working conditions, resulting in reduced testing efficiency and insufficient coverage of test scenarios, which affects the accuracy of aging test results. Utility Model Content

[0004] This application provides a servo drive testing system that solves the technical problems of low testing efficiency and low accuracy of aging test results. It can support batch synchronous aging tests of multiple servo drives, significantly improving testing efficiency, and can accurately simulate the motor operating state under real working conditions, which is conducive to improving testing accuracy.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, this application provides a servo drive testing system, the servo drive testing system comprising:

[0007] The switching power supply module includes an AC power port and a DC power port;

[0008] The control module is provided with a first output port, which is adapted to output a power-on signal;

[0009] A first switching module is connected to the DC power supply port and the first output port respectively, so as to close in response to the power-on signal;

[0010] The second switch module is connected to the first switch module and the AC power port respectively, and is closed in response to the closed state of the first switch module;

[0011] A servo drive module is connected to the second switch module. The servo drive module is adapted to synchronously drive multiple servo motors to run when the second switch module is in the closed state, for aging tests.

[0012] The servo drive testing system proposed in this application triggers the closure of a first switch module by outputting a power-on signal from the control module, which in turn causes the second switch module to close in response. This ensures that the servo drive module receives AC power supply under precise timing to simulate the complex operating states of the motor. Furthermore, this application effectively enhances the driving capability of the power-on signal issued by the control module by using the first switch module on the DC side to drive the closure of the second switch module on the AC side. Compared with related technologies, this system ensures synchronous power-on and operation of multiple servo motors, enabling aging tests of large batches of servo drives and significantly improving testing efficiency. Simultaneously, the control module can accurately control the closing time of the first and second switch modules to simulate complex operating conditions such as power-off and power-on of the motor, thereby improving testing accuracy.

[0013] Optionally, the first switching module includes a relay, the relay including a first coil and a first normally open contact;

[0014] The positive terminal of the first coil is connected to the positive terminal of the DC power supply port, and the negative terminal of the first coil is connected to the first output port.

[0015] One end of the first normally open contact is connected to the positive terminal of the AC power port, and the other end of the first normally open contact is connected to the second switch module.

[0016] Optionally, the second switching module includes a contactor, the contactor including a second coil and at least one second normally open contact;

[0017] The positive terminal of the second coil is connected to the other end of the first normally open contact, and the negative terminal of the second coil is connected to the negative terminal of the AC power port.

[0018] One end of the second normally open contact is adapted to receive three-phase AC power, and the other end of the second normally open contact is connected to the servo drive module.

[0019] This application utilizes the attraction action of the first coil and the first normally open contact to drive the second coil and multiple second normally open contacts to engage using a low-voltage DC current. This avoids the first output port of the control module being directly connected to the high-voltage circuit, effectively achieving electrical isolation between the control circuit and the motor drive circuit, and improving system safety.

[0020] Optionally, the servo drive module includes a plurality of servo drivers, the first end of each servo driver being connected to the other end of the corresponding second normally open contact, and the second end of each servo driver being connected to the corresponding servo motor.

[0021] Optionally, the servo drive module further includes several simulated loads, and each servo motor is connected to the corresponding simulated load, so that the servo driver drives the servo motor to perform aging tests under load.

[0022] This application sets up a simulated load, causing the servo motor to run under load. Compared with related technologies, this can more effectively stimulate the potential faults of the servo drive and improve the effectiveness of aging tests.

[0023] Optionally, the servo drive testing system further includes a human-machine interface terminal, and the control module is further provided with a first communication port. The human-machine interface terminal is connected to the first communication port to be adapted to send test commands through the first communication port.

[0024] Optionally, the control module is further provided with a second communication port, and the servo drive module is connected to the second communication port so that the control module receives the aging test signal of the servo motor through the second communication port and sends the aging test signal to the human-machine interaction terminal through the first communication port.

[0025] Optionally, the first communication port and the second communication port are Ethernet bus communication ports.

[0026] This application achieves visual control through a human-machine interface terminal. Testers can conveniently set test commands for aging tests through the human-machine interface terminal, and use the EtherCAT industrial bus and other bus communication functions provided by the first and second communication ports to send test commands to the control module and feed back the operating data of the servo drive to the human-machine interface terminal, thereby realizing centralized management of the aging test process of multiple servo motors.

[0027] Optionally, the servo drive testing system further includes an alarm module, and the control module is also provided with a second output port. One end of the alarm module is connected to the second output port, and the other end of the alarm module is connected to the human-machine interaction terminal.

[0028] The alarm module is adapted to perform an alarm action in response to the alarm signal output from the second output port, and the human-machine interaction terminal is adapted to display the alarm information corresponding to the alarm signal.

[0029] The control module can output different types of alarm signals through the second output port to adapt to different fault scenarios in the servo motor aging test process, enabling the alarm module to perform alarm actions in a targeted manner. At the same time, the connection between the alarm module and the human-machine interface terminal can realize the visual synchronous prompt of fault information, making it easy for testers to quickly locate the fault.

[0030] Optionally, the control module is a programmable logic controller (PLC).

[0031] This application utilizes a PLC to achieve fully automated testing and alarm functions for servo start-up aging tests, and can flexibly configure the parameters of the aging test process to adapt to different testing requirements of servo drives. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is one of the structural schematic diagrams of a servo drive testing system provided in an embodiment of this application;

[0034] Figure 2 This is a second schematic diagram of the structure of a servo drive testing system provided in an embodiment of this application;

[0035] Figure 3 This is the third schematic diagram of a servo drive testing system provided in an embodiment of this application;

[0036] Figure 4 A schematic diagram illustrating the setup process of the control module provided in an embodiment of this application;

[0037] Figure 5 This is a schematic diagram of the interface display of the human-computer interaction terminal provided in an embodiment of this application. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0040] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In the aging test process of related technologies, the testers need to connect a single servo drive to a matching motor one-to-one, configure an independent control circuit and power supply circuit for each servo drive under test, and then control the servo drive to power on by manually operating the switch, so that the motor runs under no-load under the action of the servo drive, in order to realize the aging test of the servo drive.

[0043] However, to achieve parallel testing of multiple units, a large number of additional control switches and power supply lines are required. This not only significantly increases the cost of setting up the test equipment, but also relies on manual operation of the switches. The response speed and consistency of manual operation are difficult to guarantee, making it difficult to test a large number of servo drives at the same time, which seriously affects the testing efficiency.

[0044] Furthermore, the relevant technologies can only test the basic operating capabilities of servo drives under no-load conditions. However, in actual application scenarios, servo drives need to drive motors to operate mechanical loads, and there are complex operating conditions such as motor power-on, motor power-off, motor forward rotation, and motor reverse rotation. Therefore, the relevant technologies cannot effectively simulate the complex motor operating states under actual operating conditions, resulting in insufficient test coverage and affecting the comprehensiveness and accuracy of aging tests.

[0045] Therefore, there is an urgent need for a servo drive aging test system that supports batch automated aging tests of multiple servo drives and can accurately simulate the motor operating conditions under real working conditions.

[0046] This embodiment provides a servo drive testing system. Figure 1 This is a schematic diagram of a servo drive testing system according to an embodiment of this application, such as... Figure 1 As shown, the system includes a switching power supply module 10, a control module 20, a first switch module 30, a second switch module 40, and a servo drive module 50. The switching power supply module 10 includes an AC power port and a DC power port. The control module 20 has a first output port adapted to output a power-on signal. The first switch module 30 is connected to both the DC power port and the first output port to close in response to the power-on signal. The second switch module 40 is connected to both the first switch module 30 and the AC power port to close in response to the closed state of the first switch module 30. The servo drive module 50 is connected to the second switch module 40 and is adapted to synchronously drive multiple servo motors to operate when the second switch module 40 is in the closed state for aging testing.

[0047] Specifically, the AC power port of the switching power supply module 10 is adapted to connect to three-phase AC power, and the three-phase AC power is rectified to obtain 24V DC power, which is then output through the DC power port to supply power to the system logic control circuits such as the coil circuit of the control module 20 and the first switching module 30.

[0048] The first output port is the digital output port of the control module 20. The first switch module 30 closes upon receiving a power-on signal from the first output port, which in turn closes the second switch module 40. With the second switch module 40 closed, the power supply circuit between the servo drive module 50 and the three-phase AC power supply is completed, thus powering on the servo drive module 50. After power-on, the servo drive module 50 drives the connected servo motor to start synchronously for aging tests.

[0049] Understandably, the first switch module 30 is connected to the low-voltage DC circuit output by the switching power supply module 10, adapting to the low-power drive characteristics of the digital output port of the control module 20. The second switch module 40 is connected to the high-voltage AC power circuit that supplies power to the servo drive module 50, responsible for carrying the high-current load of multiple servo motors operating in parallel. In this way, a single control module 20 can simultaneously control and power on multiple servo drive modules 50.

[0050] The servo drive testing system provided in this embodiment triggers the first switch module 30 to close by outputting a power-on signal from the control module 20, which in turn causes the second switch module 40 to close in response. This ensures that the servo drive module 50 receives AC power supply under precise timing to simulate the complex operating states of the motor. Furthermore, this application effectively enhances the driving capability of the power-on signal issued by the control module 20 by using the first switch module 30 at the DC end to drive the second switch module 40 at the AC end. Compared with related technologies, this system ensures that multiple servo motors are powered on and run synchronously, enabling aging tests of large batches of servo drives and significantly improving testing efficiency. Simultaneously, the control module 20 can accurately control the closing time of the first switch module 30 and the second switch module 40 to simulate complex operating conditions such as power-off and power-on of the motor, thereby improving testing accuracy.

[0051] like Figure 2 As shown, in some embodiments of this application, the first switch module 30 includes a relay, which includes a first coil K1 and a first normally open contact NO1. The positive terminal of the first coil K1 is connected to the positive terminal of the DC power supply port, the negative terminal of the first coil K1 is connected to the first output port, one end of the first normally open contact NO1 is connected to the positive terminal of the AC power supply port, and the other end of the first normally open contact NO1 is connected to the second switch module 40.

[0052] Specifically, when the control module outputs a power-on signal through the first output port, the first coil K1 is energized and generates electromagnetic attraction. The originally open first normally open contact NO1 closes under the electromagnetic attraction of the first coil K1, thereby connecting the second switch module 40 to the AC power output from the AC power port.

[0053] The second switch module 40 includes a contactor, which includes a second coil K2 and at least one second normally open contact NO2. The positive end of the second coil K2 is connected to the other end of the first normally open contact NO1, and the negative end of the second coil K2 is connected to the negative terminal of the AC power port. One end of the second normally open contact NO2 is adapted to receive three-phase AC power, and the other end of the second normally open contact NO2 is connected to the servo drive module 50.

[0054] Specifically, when the second switch module 40 is connected to the AC power output from the AC power port, the second coil K2 is energized and generates electromagnetic attraction. The normally open second contacts NO2, which were originally disconnected, close under the electromagnetic attraction of the second coil K2, thereby connecting each servo drive module 50 to the three-phase AC power.

[0055] In this embodiment, the closing action of the first coil K1 and the first normally open contact NO1 is used to drive the second coil K2 and multiple second normally open contacts NO2 to close using a low-voltage DC current. This avoids the first output port of the control module being directly connected to the high-voltage circuit, effectively achieving electrical isolation between the control circuit and the motor drive circuit, and improving system safety.

[0056] like Figure 2 As shown, in some embodiments of this application, the servo drive module 50 includes a plurality of servo drivers UA1 to UAN, UB1 to UBn and UC1 to UCn. The first end of each servo driver is connected to the other end of the corresponding second normally open contact, and the second end of each servo driver is connected to the corresponding servo motors MA1 to MAn, MB1 to MBn and MC1 to MCn.

[0057] Specifically, such as Figure 2 As shown, the R-line port corresponds to phase A of the three-phase AC power, the S-line port corresponds to phase B of the three-phase AC power, the T-line port corresponds to phase C of the three-phase AC power, and the N-line port corresponds to the neutral line of the three-phase AC power. The servo drive testing system provided in this embodiment also includes an isolating switch QS for each of the R-line, S-line, and T-line ports, a first circuit breaker QF1 for each of the R-line, S-line, T-line, and N-line ports, and a second normally open contact NO2 connected to each of the R-line, S-line, and T-line ports. The corresponding isolating switches QS, first circuit breakers QF1, and second normally open contacts NO2 are connected sequentially. In addition, the servo drive test system provided in this application embodiment is also provided with a second circuit breaker QF2, one of which is connected between the first circuit breaker QF1 corresponding to the R line port and the positive terminal of the AC power port of the switching power supply module, and the other is connected between the first circuit breaker QF1 corresponding to the N line port and the negative terminal of the AC power port of the switching power supply module.

[0058] Understandably, if the second normally open contact NO2 closes when the disconnecting switch QS, the first circuit breaker QF1, and the first circuit breaker QF2 are all closed, the servo drive will be connected to the corresponding three-phase AC power supply in phases A, B, and C, thereby achieving power-on.

[0059] The servo drive module 50 also includes several simulated loads, with each servo motor connected to its corresponding simulated load, so that the servo driver can drive the servo motor to perform aging tests under load.

[0060] Specifically, in this embodiment of the application, the simulated load is mounted on an aging test rack using an inertia disk, and the servo motor runs under load under the action of the corresponding servo driver to realize the servo driver's load aging test.

[0061] Furthermore, for some of the output shafts of the servo motors under test, a motor-pair drag-load structure is configured. This involves connecting an auxiliary servo motor to the output shaft of the servo motor under test to simulate the reverse torque experienced by the motor when driving a load under actual operating conditions. This embodiment, by setting a simulated load, allows the servo motor to operate under load, which, compared to related technologies, can more effectively stimulate potential faults in the servo driver and improve the effectiveness of aging tests.

[0062] like Figure 2 As shown, the servo drive testing system also includes a human-machine interface (HMI) terminal 60. For example... Figure 3 As shown, the control module 20 is also provided with a first communication port, and the human-machine interface terminal 60 is connected to the first communication port to facilitate sending test commands through the first communication port. The control module 20 is also provided with a second communication port, and the servo drive module 50 is connected to the second communication port so that the control module 20 receives the aging test signal of the servo motor through the second communication port and sends the aging test signal to the human-machine interface terminal 60 through the first communication port.

[0063] In some embodiments of this application, the control module 20 is a PLC. Further, the first communication port and the second communication port are EtherCAT bus communication ports. It is understood that the PLC integrates EtherCAT master station functionality.

[0064] Specifically, the servo drive testing system provided in this application embodiment realizes EtherCAT bus communication between the human-machine interface terminal 60 and the control module 20 through a first communication port, and realizes EtherCAT bus communication between the control module 20 and the servo driver through a second communication port. During the test, the system can automatically collect and record the test data corresponding to the servo motor according to different load parameters such as the inertia disk specifications and the magnitude of the drag torque. All test data are transmitted to the control module 20 for unified storage through the EtherCAT bus, and then transmitted from the control module 20 to the human-machine interface terminal 60 through the EtherCAT bus.

[0065] In this embodiment, visual control is achieved through the human-machine interface terminal 60. Testers can conveniently set test commands for aging tests through the human-machine interface terminal 60, and use the bus communication functions such as EtherCAT industrial bus provided by the first and second communication ports to send test commands to the control module 20 and feed back the operating data of the servo drive to the human-machine interface terminal 60, thereby realizing centralized management of the aging test process of multiple servo motors.

[0066] like Figure 2As shown, the servo drive test system also includes an alarm module 70, and the control module 20 is also provided with a second output port. One end of the alarm module 70 is connected to the second output port, and the other end of the alarm module 70 is connected to the human-machine interaction terminal.

[0067] The alarm module 70 is adapted to perform an alarm action in response to the alarm signal output from the second output port, and the human-machine interface terminal 60 is adapted to display the alarm information corresponding to the alarm signal.

[0068] Specifically, the alarm module 70 may include a buzzer and multiple indicator lights. The control module 20 can output different types of alarm signals through the second output port, enabling the alarm module 70 to combine different alarm methods for different types. The indicator lights illuminate to correspond to the system's operating status, alarm status, and stop status, respectively. The buzzer's alarm action indicates a system fault and is typically combined with the corresponding indicator light to trigger an alarm.

[0069] Figure 4 The procedure for setting servo parameters for a servo drive test system is shown, such as... Figure 4 As shown, firstly, the isolating switch QS, the first circuit breaker QF1, and the second circuit breaker QF2 are closed to power on the system. Then, the aging time is set via the human-machine interface terminal 60. When the aging time is reached, the system ends the aging test. Next, the running time is set via the human-machine interface terminal 60. The running time refers to the time for the servo drive to run the servo motor each time. For example, in one embodiment of this application, when the set time is reached, the servo drive is powered off, i.e., the first switch module 30 and the second switch module 40 are disconnected, causing the servo drive to lose power. After waiting for 30 seconds, the drive is automatically powered on again, i.e., the first switch module 30 and the second switch module 40 are closed again. This process is repeated multiple times to simulate the real operating conditions of the servo drive. Then, the number of servo drives to be aged is set via the human-machine interface terminal 60 to determine the number of servo drives participating in the aging test. Finally, the power supply is triggered to power on the servo motor.

[0070] In addition, if the servo driver fails to communicate after the servo motor is powered on by the trigger power supply, the alarm module 70 will be triggered to issue an alarm.

[0071] Figure 5 The visual interface of the human-computer interaction terminal 60 is shown, such as... Figure 5 As shown, the human-machine interface terminal 60 visualizes the aging test results based on the received test data. Testers can intuitively determine the aging test results, historical alarm records, real-time alarm records, servo parameter settings, and aging time of each servo drive through the human-machine interface terminal 60.

[0072] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

[0073] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0074] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0075] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A servo drive testing system, characterized in that, The servo drive testing system includes: The switching power supply module includes an AC power port and a DC power port; The control module is provided with a first output port, which is adapted to output a power-on signal; A first switching module is connected to the DC power supply port and the first output port respectively, so as to close in response to the power-on signal; The second switch module is connected to the first switch module and the AC power port respectively, and is closed in response to the closed state of the first switch module; A servo drive module is connected to the second switch module. The servo drive module is adapted to synchronously drive multiple servo motors to run when the second switch module is in the closed state, for aging tests.

2. The servo drive testing system according to claim 1, characterized in that, The first switching module includes a relay, and the relay includes a first coil and a first normally open contact; The positive terminal of the first coil is connected to the positive terminal of the DC power supply port, and the negative terminal of the first coil is connected to the first output port. One end of the first normally open contact is connected to the positive terminal of the AC power port, and the other end of the first normally open contact is connected to the second switch module.

3. The servo drive testing system according to claim 2, characterized in that, The second switching module includes a contactor, the contactor including a second coil and at least one second normally open contact; The positive terminal of the second coil is connected to the other end of the first normally open contact, and the negative terminal of the second coil is connected to the negative terminal of the AC power port. One end of the second normally open contact is adapted to receive three-phase AC power, and the other end of the second normally open contact is connected to the servo drive module.

4. The servo drive testing system according to claim 3, characterized in that, The servo drive module includes several servo drivers. The first end of each servo driver is connected to the other end of the corresponding second normally open contact, and the second end of each servo driver is connected to the corresponding servo motor.

5. The servo drive testing system according to claim 4, characterized in that, The servo drive module also includes several simulated loads, and each servo motor is connected to the corresponding simulated load, so that the servo driver drives the servo motor to perform aging tests under load.

6. The servo drive testing system according to claim 1, characterized in that, The servo drive testing system also includes a human-machine interface terminal, and the control module is further provided with a first communication port. The human-machine interface terminal is connected to the first communication port to be adapted to send test commands through the first communication port.

7. The servo drive testing system according to claim 6, characterized in that, The control module is also provided with a second communication port, and the servo drive module is connected to the second communication port so that the control module receives the aging test signal of the servo motor through the second communication port and sends the aging test signal to the human-machine interaction terminal through the first communication port.

8. The servo drive testing system according to claim 7, characterized in that, The first communication port and the second communication port are Ethernet bus communication ports.

9. The servo drive testing system according to claim 6, characterized in that, The servo drive testing system also includes an alarm module, and the control module is further provided with a second output port. One end of the alarm module is connected to the second output port, and the other end of the alarm module is connected to the human-machine interaction terminal. The alarm module is adapted to perform an alarm action in response to the alarm signal output from the second output port, and the human-machine interaction terminal is adapted to display the alarm information corresponding to the alarm signal.

10. The servo drive testing system according to any one of claims 1 to 9, characterized in that, The control module is a programmable logic controller.

Images