Motor driver test system and control method thereof

Abstract

The invention relates to a motor driver testing system and a control method thereof, and relates to the technical field of driver testing, the motor driver testing system comprises a first motor, and the first motor is provided with a first driving shaft; the to-be-tested driver comprises a first rectifier group and a first inverter group, the first inverter group is electrically connected with the first rectifier group and the first motor, and the first inverter group is used for controlling the frequency of the first motor; a second driving shaft of the second motor is connected with the first driving shaft through a connecting shaft; the driver for testing comprises a second inverter set, the second inverter set is electrically connected with the first rectifier set and the second motor, and the second inverter set is used for controlling the frequency of the second motor; when the second motor is used as a generator, the second inverter group rectifies the electric energy generated by the second motor, and the test system can reduce the total electric energy consumed in the test process and save energy.

Description

Technical Field

[0001] The present application relates to the technical field of driver testing, and in particular to a motor driver testing system and a control method thereof. Background Art

[0002] A motor driver is a device that uses electronic technology to control the speed of an AC motor. It adjusts the speed of the motor by changing the voltage and frequency of the AC motor. A motor driver generally consists of three parts: a rectifier, an intermediate circuit, and an inverter. It can adjust the output torque and speed of the motor as needed, thereby achieving precise control of the machine and energy saving. Motor drivers are widely used in many fields such as mechanical equipment, industrial automation, food manufacturing, textile equipment, wind power generation, and printing. However, when testing the stability of motor drivers, in existing test methods, it is often necessary to use some complex test systems, resulting in high test costs and unstable test results.

[0003] The existing motor driver testing method is to use the driver to drive the motor, increase the driver current by adding load to the motor, thereby judging the driver's overcurrent capacity, and judge whether the driver's functions are normal by manual measurement. This method consumes a lot of power during testing, and the manual measurement method is prone to problems such as misjudgment. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the present application aims to provide a motor driver testing system and a control method thereof.

[0005] According to a first aspect of the present application, a motor drive test system is provided, comprising: a first electric machine having a first drive shaft; A driver to be tested, the driver to be tested is used to control the rotation of the first motor, the driver to be tested includes a first rectifier group and a first inverter group, the first rectifier group is electrically connected to a power supply, the first inverter group is electrically connected to the first rectifier group and the first motor respectively, and the first inverter group is used to control the frequency of the first motor; A second motor, wherein the second motor has a second drive shaft, and the second drive shaft is axially connected to the first drive shaft; A test driver, the test driver includes a second inverter group, the second inverter group is electrically connected to the first rectifier group and the second motor respectively, the second inverter group is used to control the frequency of the second motor; when the first drive shaft drives the second drive shaft to rotate so that the second motor is used as a generator, the second inverter group rectifies the electric energy generated by the second motor.

[0006] The above technical solution has at least the following effects: when the first drive shaft drives the second drive shaft to rotate so that the second motor is used as a generator, the second inverter group rectifies the electric energy generated by the second motor. The second inverter group converts the AC electric energy generated by the second motor into DC electric energy, and provides the DC electric energy generated by the second motor to the driver to be tested. The current generated by the second motor can flow through the second inverter group, the first inverter group and the first motor in sequence, thereby supplying power to the first motor, which greatly reduces the total electric energy consumed during the test and saves energy.

[0007] In a possible implementation manner, the driver to be tested further includes a first controller, and the first controller is used to send a first switching signal to the first inverter group, so that the first inverter group controls the first motor to rotate at a first preset frequency; The test driver also includes a second controller, which is used to send a second switch signal to the second inverter group, so that when the first drive shaft drives the second drive shaft to rotate, the second inverter group controls to reduce the frequency of the second motor.

[0008] The above technical solution has at least the following effects: when the first drive shaft drives the second drive shaft to rotate and the second inverter group controls to reduce the frequency of the second motor, the second motor is used as a generator and is in a power generation state. The direct current generated by the second motor can flow through the second inverter group, the first inverter group and the first motor in sequence, thereby supplying power to the first motor, greatly reducing the total power consumed during the test and saving energy.

[0009] In a possible implementation, the motor driver testing system further includes a current detection module, and the current detection module is used to detect an output current of the driver to be tested.

[0010] The above technical solution has at least the following effects: when the output current of the driver to be tested is within the rated current interval, it is determined that the driver to be tested meets the stability requirement. When the output current of the driver to be tested exceeds the upper limit of the rated current interval or is lower than the lower limit of the rated current interval, it is determined that the driver to be tested cannot meet the stability requirement, so as to detect the current stability of the driver to be tested.

[0011] In a possible implementation manner, the motor driver test system further includes a monitoring device, and the monitoring device is electrically connected to the current detection module, the first controller, and the second controller; The monitoring device is configured to perform the following steps: Controlling the first controller to send the first switch signal to the first inverter group, so that the first inverter group controls the first motor to rotate at the first preset frequency; Controlling the second controller to send the second switch signal to the second inverter group, so that when the first drive shaft drives the second drive shaft to rotate, the second inverter group controls to reduce the frequency of the second motor; When it is detected that the output current of the driver to be tested reaches the rated current, it is monitored whether the output current of the driver to be tested is within the rated current range within a preset time.

[0012] The above technical solution has at least the following effects: by setting up a monitoring device, the test process can be automatically detected and controlled to completely replace the traditional motor driver test method, while reducing system energy consumption, the degree of test automation is improved, and the test time of the motor driver can be greatly shortened and the test efficiency is improved. And judging the test results through the monitoring device can improve the accuracy of the test results and avoid the problem of misjudgment in traditional manual testing.

[0013] In a possible implementation manner, the driver to be tested further includes an alarm module, and when the output current of the driver to be tested is higher than the upper limit of the rated current interval, the alarm module issues an alarm prompt, and the monitoring device is further configured to, after monitoring whether the output current of the driver to be tested within a preset time is within the rated current interval, control the second controller to send a signal to the second inverter group again, so that the second inverter group controls to continue to reduce the frequency of the second motor; Determine the time when the alarm module issues an alarm prompt.

[0014] The above technical solution has at least the following effects: the monitoring device can automatically detect and judge whether the reaction speed of the alarm module to issue an alarm meets the use requirements, so as to completely replace the traditional motor driver testing method, reduce the system energy consumption and improve the degree of automation of the test, which can greatly shorten the test time of the motor driver and improve the test efficiency. The test results can be judged by the monitoring device, which can improve the accuracy of the test results and avoid the problem of misjudgment in traditional manual testing.

[0015] In a possible implementation, the motor driver testing system further includes a monitoring device, and the driver to be tested further includes a communication port. The monitoring device is electrically connected to the driver to be tested via the communication port and sends and receives data, and the monitoring device monitors the packet loss rate of the sent and received data.

[0016] The above technical solution has at least the following effects: the monitoring device can automatically detect whether the communication function of the driver is normal, which can reduce the detection time, improve the test efficiency, improve the accuracy of the test results, and avoid the problem of misjudgment in traditional manual testing.

[0017] In a possible implementation, the monitoring device applies a first voltage value to the communication port, the driver to be tested transmits the received first voltage value to the monitoring device in a communication manner to form a second voltage value, and the monitoring device monitors whether the first voltage value and the second voltage value are the same.

[0018] The above technical solution has at least the following effects: by automatically detecting whether the port function of the driver is normal through the monitoring device, the detection time can be reduced, the test efficiency can be improved, the accuracy of the test results can be improved, and the problem of misjudgment in traditional manual testing can be avoided.

[0019] In a possible implementation manner, the motor driver test system further includes a monitoring device, the driver to be tested further includes a display module, the monitoring device is communicatively connected to the display module, and the monitoring device sends the content to be displayed to the display module; Monitor whether the display content of the display module is the same as the content to be displayed sent by the monitoring device.

[0020] The above technical solution has at least the following effects: by automatically detecting whether the communication function of the driver is normal through the monitoring device, the detection time can be reduced, the test efficiency can be improved, the accuracy of the test results can be improved, and the problem of misjudgment in traditional manual testing can be avoided.

[0021] According to a second aspect of the present application, a control method for a motor driver test system is provided, which is used to implement the motor driver test system as described in the first aspect of the present application, and the control method for the motor driver test system includes: S100, the first motor is powered on, and the first inverter group is controlled to be on and off so that the first motor rotates at a first preset frequency; S200, controlling the on and off of the second inverter group to reduce the frequency of the second motor; S300: When it is detected that the output current of the driver to be tested reaches the rated current, monitor whether the output current of the driver to be tested within a preset time is within a rated current range.

[0022] The above technical solution has at least the following effects: the frequency of the second motor is reduced so that the output current of the output end of the driver to be tested gradually increases, the first drive shaft drives the second drive shaft to rotate so that the second motor is used as a generator, and the second inverter group rectifies the electric energy generated by the second motor. The second inverter group converts the AC electric energy generated by the second motor into DC electric energy, and provides the DC electric energy generated by the second motor to the driver to be tested. The current generated by the second motor can flow through the second inverter group, the first inverter group and the first motor in sequence, thereby supplying power to the first motor, which greatly reduces the total electric energy consumed during the test and saves energy. The current stability of the driver to be tested is determined by monitoring whether the output current of the driver to be tested within a preset time is within the rated current range.

[0023] In a possible implementation manner, the driver to be tested includes an alarm module, and when the output current of the driver to be tested is higher than an upper limit value of a rated current range, the alarm module issues an alarm prompt, and the control method includes: S400, controlling the on and off of the second inverter group to reduce the frequency of the second motor, and determining the time when the alarm module issues an alarm prompt.

[0024] The above technical solution has at least the following effects: the monitoring device can automatically detect and judge whether the reaction speed of the alarm module to issue an alarm meets the use requirements, so as to completely replace the traditional method, reduce the energy consumption of the system and improve the degree of automation of the test, which can greatly shorten the test time of the motor driver and improve the test efficiency. The test results can be judged by the monitoring device, which can improve the accuracy of the test results and avoid the problem of misjudgment in traditional manual testing.

[0025] The advantage of the present application is that when the first drive shaft drives the second drive shaft to rotate so that the second motor is used as a generator, the second inverter group rectifies the electric energy generated by the second motor. The second inverter group converts the AC power generated by the second motor into DC power, and provides the DC power to the driver to be tested. The current generated by the second motor can flow through the second inverter group, the first inverter group and the first motor in sequence, thereby supplying power to the first motor, which greatly reduces the total electric energy consumed during the test and saves energy.

[0026] Other features and advantages of the present application will be set forth in the subsequent description, and in part will become apparent from the description, or may be understood through implementation of the present application. The objects and other advantages of the present application may be realized and obtained through the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present application and are used together with the description to explain the principles of the present application. In these drawings, similar reference numerals are used to identify similar elements. The drawings described below are some embodiments of the present application, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a composition diagram of a motor drive test system according to an exemplary embodiment; Figure 2 is a circuit diagram of a motor drive test system according to an exemplary embodiment; Figure 3 is a schematic structural diagram of a first inverter group according to an exemplary embodiment; Figure 4 is a current flow diagram of a motor drive test system according to an exemplary embodiment; Figure 5 is a control flow chart of a motor drive test system according to an exemplary embodiment.

[0029] Reference numerals: 1. First motor; 11. First drive shaft; 2. Second motor; 22. Second drive shaft; 3. Driver to be tested; 31. First rectifier group; 311. First rectifier diode; 32. First inverter group; 321. First switch tube; 4. Driver for test; 41. Second inverter group; 411. Second switch tube; 42. Second rectifier group; 421. Second rectifier diode; 5. Monitoring device. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the feature vectors in the embodiments can be arbitrarily combined with each other.

[0031] A motor driver is a device that uses electronic technology to control the speed of an AC motor. It adjusts the speed of the motor by changing the voltage and frequency of the AC motor. A motor driver generally consists of three parts: a rectifier, an intermediate circuit, and an inverter. It can adjust the output torque and speed of the motor as needed, thereby achieving precise control of the machine and energy saving. Motor drivers are widely used in many fields such as mechanical equipment, industrial automation, food manufacturing, textile equipment, wind power generation, and printing. However, when testing the stability of motor drivers, in existing test methods, it is often necessary to use some complex test systems, resulting in high test costs and unstable test results.

[0032] The existing motor driver testing method is to use the driver to drive the motor, increase the driver current by adding load to the motor, thereby judging the driver's overcurrent capacity, and judge whether the driver's functions are normal by manual measurement. This method consumes a lot of power during testing, and the manual measurement method is prone to problems such as misjudgment.

[0033] To solve the above problems, the present application provides a motor driver test system, which includes a first motor, a driver to be tested, a second motor and a driver for testing. The first motor has a first drive shaft. The driver to be tested is used to control the rotation of the first motor, and the driver to be tested includes a first rectifier group and a first inverter group, the first rectifier group is electrically connected to the power supply, the first inverter group is electrically connected to the first rectifier group and the first motor respectively, and the first inverter group is used to control the frequency of the first motor. The second motor has a second drive shaft, and the second drive shaft is connected to the first drive shaft. The driver for testing includes a second inverter group, the second inverter group is electrically connected to the second motor, the second inverter group is electrically connected to the first rectifier group and the second motor respectively, the second inverter group is used to control the frequency of the second motor, and the second inverter group is used to rectify the electric energy generated by the second motor when the first drive shaft drives the second drive shaft to rotate so that the second motor is used as a generator. With this design, the current generated by the second motor can flow through the second inverter group, the first inverter group and the first motor in sequence, thereby supplying power to the first motor, greatly reducing the total power consumed during the test and saving energy.

[0034] An exemplary embodiment of the present application provides a motor driver testing system. Figure 1-Figure 4 The motor driver test system includes a first motor 1, a driver to be tested 3, a second motor 2 and a test driver 4.

[0035] In some embodiments, the first motor 1 has a first driving shaft 11. The first motor 1 can drive the first driving shaft 11 to rotate.

[0036] In some embodiments, the driver to be tested 3 is used to control the rotation of the first motor 1. The driver to be tested 3 includes a first rectifier group 31 and a first inverter group 32. The first rectifier group 31 is connected to the power supply through phase lines L1, L2 and L3. The first inverter group 32 is electrically connected to the first rectifier group 31 and the first motor 1 respectively. The first inverter group 32 is connected to the first motor 1 through terminal U1, terminal V1 and terminal W1. The first inverter group 32 is used to control the frequency of the first motor 1. The power supply provides AC power. The first rectifier group 31 is used to convert AC power into DC power to provide it to the first inverter group 32. The first inverter group 32 converts DC power into AC power of a certain voltage and frequency to meet the use requirements of the first motor 1. The first rectifier group 31 can be composed of six first rectifier diodes 311. The first inverter group 32 can be composed of six first switch tubes 321.

[0037] The second motor 2 has a second drive shaft 22 , and the second drive shaft 22 is axially connected to the first drive shaft 11 . When the first motor 1 is started, the first drive shaft 11 drives the second drive shaft 22 to rotate synchronously.

[0038] Exemplarily, a coupling is provided between the first drive shaft 11 and the second drive shaft 22, and the coupling can transmit the power of the first drive shaft 11 to the second drive shaft 22 of the second motor 2, thereby reducing the loss of energy during the transmission process.

[0039] In some embodiments, the test driver 4 includes a second inverter group 41 and a second rectifier group 42, the second inverter group 41 is electrically connected to the first rectifier group 31 and the second motor 2, respectively, and the second inverter group 41 is connected to the second motor 2 through the terminal U2, the terminal V2 and the terminal W2. The second inverter group 41 is used to control the frequency of the second motor 2. Exemplarily, the second inverter group 41 can be composed of 6 second switch tubes 411, and the frequency of the second motor 2 is controlled by changing the on and off of each second switch tube 411 in the second inverter group 41, and the second rectifier group 42 can be composed of six second rectifier diodes 421.

[0040] When the first drive shaft 11 drives the second drive shaft 22 to rotate so that the second motor 2 is used as a generator, the second inverter group 41 rectifies the electric energy generated by the second motor 2. The second inverter group 41 converts the AC electric energy generated by the second motor 2 into DC electric energy, and provides the DC electric energy generated by the second motor 2 to the driver 3 to be tested. The current generated by the second motor 2 can flow through the second inverter group 41, the first inverter group 32 and the first motor 1 in sequence, thereby supplying power to the first motor 1, which greatly reduces the total electric energy consumed during the test and saves energy.

[0041] In some embodiments, the driver to be tested 3 further includes a first controller, which is used to send a first switching signal to the first inverter group 32, so that the first inverter group 32 controls the first motor 1 to rotate at a first preset frequency. For example, the first inverter group 32 can control the first motor 1 to rotate at a frequency of 50 Hz.

[0042] In some embodiments, the test driver 4 also includes a second controller, which is used to send a second switching signal to the second inverter group 41 so that when the first drive shaft 11 drives the second drive shaft 22 to rotate, the second inverter group 41 controls to reduce the frequency of the second motor 2.

[0043] For example, when the first motor 1 rotates at a frequency of 50 Hz, the second inverter group 41 can control the second motor 2 to rotate at a frequency of 40 Hz. At this time, the second drive shaft 22 applies a load to the first drive shaft 11, and the actual frequency of the first motor 1 is always lower than 50 Hz, so that the first motor 1 is in a power consumption state. The actual frequency of the second motor 2 is always higher than the frequency of 40 Hz given by the second inverter group 41, so that the second motor 2 is used as a generator, and the second motor 2 is in a power generation state. The direct current generated by the second motor 2 can flow through the second inverter group 41, the first inverter group 32 and the first motor 1 in sequence, thereby supplying power to the first motor 1, greatly reducing the total power consumed during the test and saving energy.

[0044] In some embodiments, the motor drive test system further includes a current detection module, which is electrically connected to the output end of the driver 3 to be tested. The current detection module is used to detect the output current of the output end of the driver 3 to be tested. Exemplarily, the current detection module can use a current sensor.

[0045] In some embodiments, the output current of the output terminal of the driver to be tested 3 is defined as an average current value flowing through the connection terminal U1 , the connection terminal V1 , and the connection terminal W1 .

[0046] When the second inverter group 41 controls to reduce the frequency of the second motor 2, the current detection module detects that the output current of the output end of the driver to be tested 3 reaches the rated current, and monitors whether the output current of the driver to be tested 3 within the preset time is within the rated current interval. When the output current of the driver to be tested 3 is within the rated current interval, it is determined that the driver to be tested 3 meets the stability requirements. When the output current of the driver to be tested 3 exceeds the upper limit of the rated current interval or is lower than the lower limit of the rated current interval, it is determined that the driver to be tested 3 cannot meet the stability requirements, so as to detect the current stability of the driver to be tested 3.

[0047] In some embodiments, the motor driver test system further includes a monitoring device 5 , which is electrically connected to the current detection module, the first controller, and the second controller.

[0048] The monitoring device 5 is configured to perform the following steps: The first controller is controlled to send a first switching signal to the first inverter group 32, so that the first inverter group 32 controls the first motor 1 to rotate at a first preset frequency.

[0049] The second controller is controlled to send a second switch signal to the second inverter group 41 , so that when the first drive shaft 11 drives the second drive shaft 22 to rotate, the second inverter group 41 controls to reduce the frequency of the second motor 2 .

[0050] When it is detected that the output current of the driver to be tested 3 reaches the rated current, it is monitored whether the output current of the driver to be tested 3 is within the rated current range within a preset time.

[0051] When the output current of the driver 3 to be tested is within the rated current interval, it is determined that the driver 3 to be tested meets the stability requirement. When the output current of the driver 3 to be tested exceeds the upper limit of the rated current interval or is lower than the lower limit of the rated current interval, it is determined that the driver 3 to be tested does not meet the stability requirement.

[0052] This embodiment can automatically detect and control the test process by setting up the monitoring device 5, so as to completely replace the traditional motor driver test method, thereby reducing the system energy consumption and improving the degree of test automation, which can greatly shorten the test time of the motor driver and improve the test efficiency. And judging the test results through the monitoring device 5 can improve the accuracy of the test results and avoid the problem of misjudgment in traditional manual testing.

[0053] In some embodiments, the driver to be tested 3 further includes an alarm module. When the output current of the driver to be tested 3 is higher than the upper limit of the rated current range, the alarm module issues an alarm prompt.

[0054] The monitoring device 5 is further configured to, after the step of detecting whether the output current of the output terminal of the driver to be tested 3 is within the rated current interval within the preset time, control the second controller to send a signal to the second inverter group 41 again, so that the second inverter group 41 controls to continue to reduce the frequency of the second motor 2. Determine the time when the alarm module issues an alarm prompt. It can be understood that the time when the alarm prompt is issued refers to the time interval from the second controller sending a signal to the second inverter group 41 to the alarm module issuing an alarm prompt.

[0055] When the second inverter group 41 controls to continue to reduce the frequency of the second motor 2, the speed of the second motor 2 decreases, so that the load of the second drive shaft 22 on the first drive shaft 11 increases, and the current of the driver to be tested 3 increases accordingly, thereby causing the output current of the output end of the driver to be tested 3 to exceed the upper limit of the rated current range. At this time, the alarm prompt of the alarm module is triggered, and the reaction speed of the driver to be tested 3 when the current is overcurrent is determined by determining the time when the alarm module sends out the alarm prompt.

[0056] This embodiment can realize automatic detection and judgment of whether the reaction speed of the alarm module to issue an alarm meets the use requirements through the monitoring device 5, so as to completely replace the traditional motor driver testing method, reduce the energy consumption of the system and improve the degree of automation of the test, which can greatly shorten the test time of the motor driver and improve the test efficiency. The test results are judged by the monitoring device 5, which can improve the accuracy of the test results and avoid the problem of misjudgment in traditional manual testing.

[0057] In some embodiments, the motor driver test system further includes a monitoring device 5, and the driver to be tested 3 further includes a communication port. The monitoring device 5 is electrically connected to the driver to be tested 3 through the communication port and transmits and receives data. The monitoring device 5 can monitor the packet loss rate of the transmitted and received data. Exemplarily, the monitoring device 5 can be set as a monitoring station.

[0058] The tester needs to connect the communication port of the driver 3 to be tested to the monitoring device 5, and then start the communication test function. The monitoring device 5 will automatically send and receive data with the driver 3 to be tested, and record the packet loss rate. When the packet loss rate is not higher than 1% within two minutes, it will be displayed that the communication test has passed, and the test results can be printed. The monitoring device 5 can automatically detect whether the communication function of the driver is normal, which can reduce the detection time, improve the test efficiency, improve the accuracy of the test results, and avoid the problem of misjudgment in traditional manual testing.

[0059] In some embodiments, the monitoring device 5 applies a first voltage value to the communication port, and the driver to be tested 3 transmits the received first voltage value to the monitoring device 5 in a communication manner to form a second voltage value. The monitoring device 5 monitors whether the first voltage value and the second voltage value are the same.

[0060] Exemplarily, the tester connects the communication port of the driver 3 to be tested to the monitoring device 5 via a cable, and then starts the port test function. The monitoring device 5 will give a first voltage value to each communication port, and the driver 3 to be tested will send the received first voltage value to the monitoring device 5 via the cable. The monitoring device 5 determines whether the port function meets the test standard requirements by comparing the data difference between the two. When the first voltage value and the second voltage value are the same, it means that the communication port function meets the test standard requirements. When the first voltage value and the second voltage value are different, it means that the communication port function does not meet the test standard requirements. By using the monitoring device 5 to automatically detect whether the port function of the driver is normal, the detection time can be reduced, the test efficiency can be improved, the accuracy of the test results can be improved, and the problem of misjudgment in traditional manual testing can be avoided.

[0061] In some embodiments, the driver 3 to be tested further includes a display module, the monitoring device 5 is in communication connection with the display module, and the monitoring device 5 sends the content to be displayed to the display module. The monitoring device 5 monitors whether the display content of the display module is the same as the content to be displayed sent by the monitoring device 5.

[0062] Exemplarily, the tester sends the content to be displayed by the driver 3 to be tested to the driver 3 to be tested through the monitoring device 5, and then the monitoring device 5 obtains the actual display content of the display module of the driver 3 to be tested through a visual detection module such as a camera, and determines whether the actual display content of the display module is consistent with the sent content and whether the refresh speed can meet the requirements, so as to judge whether the display module function of the driver 3 to be tested is normal. The monitoring device 5 can realize automatic detection of whether the communication function of the driver is normal, which can reduce the detection time, improve the test efficiency, improve the accuracy of the test results, and avoid the problem of misjudgment in traditional manual testing.

[0063] An exemplary embodiment of the present application provides a control method for the motor drive test system as described above, see Figure 1-Figure 5 , the control method of the motor drive test system includes the following steps: S100 , the first motor is powered on, and the on and off of the first inverter group is controlled to make the first motor rotate at a first preset frequency.

[0064] The first driving shaft 11 is connected to the second driving shaft 22 . When the first motor 1 rotates at a first preset frequency, the second motor 2 rotates synchronously with the first motor 1 .

[0065] S200, controlling the on and off of the second inverter group to reduce the frequency of the second motor.

[0066] Reducing the frequency of the second motor 2 reduces the speed of the second motor 2, increases the load of the second drive shaft 22 on the first drive shaft 11, and increases the current of the driver 3 to be tested, thereby gradually increasing the output current of the output end of the driver 3 to be tested. At this time, the first drive shaft 11 drives the second drive shaft 22 to rotate so that the second motor 2 is used as a generator, and the second inverter group 41 rectifies the electric energy generated by the second motor 2. The second inverter group 41 converts the AC power generated by the second motor 2 into DC power, and provides the DC power generated by the second motor 2 to the driver 3 to be tested. The current generated by the second motor 2 can flow through the second inverter group 41, the first inverter group 32 and the first motor 1 in sequence, thereby supplying power to the first motor 1, which greatly reduces the total power consumed during the test and saves energy.

[0067] S300: When it is detected that the output current of the driver to be tested reaches the rated current, monitor whether the output current of the driver to be tested within a preset time is within the rated current range.

[0068] When the output current of the driver 3 to be tested is within the rated current interval, it is determined that the driver 3 to be tested meets the stability requirement. When the output current of the driver 3 to be tested exceeds the upper limit of the rated current interval or is lower than the lower limit of the rated current interval, it is determined that the driver 3 to be tested does not meet the stability requirement.

[0069] In this embodiment, the motor driver test system may be provided with a current detection module, and the current detection module is electrically connected to the monitoring device 5 . Exemplarily, the current detection module may be integrated with the monitoring device 5 .

[0070] The monitoring device 5 can directly determine whether the current of the driver 3 to be tested meets the stability requirement based on the detection result of the current detection module. By automatically detecting whether the current stability of the driver is normal through the monitoring device 5, the detection time can be reduced, the test efficiency can be improved, the accuracy of the test results can be improved, and the problem of misjudgment in traditional manual testing can be avoided.

[0071] In some embodiments, the driver to be tested 3 includes an alarm module. When the output current of the driver to be tested 3 is higher than the upper limit of the rated current range, the alarm module issues an alarm prompt.

[0072] The control method of the motor driver test system also includes the following steps: S400, controlling the on and off of the second inverter group to reduce the frequency of the second motor, and determining the time when the alarm module issues an alarm prompt.

[0073] When the second inverter group 41 controls to continue to reduce the frequency of the second motor 2, the speed of the second motor 2 decreases, so that the load of the second drive shaft 22 on the first drive shaft 11 increases, and the current of the driver to be tested 3 increases accordingly, thereby causing the output current of the output end of the driver to be tested 3 to exceed the upper limit of the rated current range. At this time, the alarm prompt of the alarm module will be triggered, and the monitoring device 5 can determine the time when the alarm module sends the alarm prompt to judge the reaction speed of the driver to be tested 3 when the current is overcurrent.

[0074] This embodiment can use the monitoring device 5 to automatically detect and judge whether the reaction speed of the alarm module to issue an alarm meets the use requirements, so as to completely replace the traditional motor driver testing method, reduce the system energy consumption and improve the degree of automation of the test, which can greatly shorten the test time of the motor driver and improve the test efficiency. The test results are judged by the monitoring device 5, which can improve the accuracy of the test results and avoid the problem of misjudgment in traditional manual testing.

[0075] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device comprising the elements.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. The present application is described in detail with reference to the preferred embodiments only. Those skilled in the art should understand that the technical solution of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application, and should be included in the scope of the claims of the present application.

Claims

1. A motor driver test system, characterized in that: include: A first motor (1), the first motor (1) having a first drive shaft (11); A driver to be tested (3), the driver to be tested (3) being used to control the rotation of the first motor (1), the driver to be tested (3) comprising a first rectifier group (31) and a first inverter group (32), the first rectifier group (31) being electrically connected to a power source, the first inverter group (32) being electrically connected to the first rectifier group (31) and the first motor (1) respectively, and the first inverter group (32) being used to control the frequency of the first motor (1); a second motor (2), the second motor (2) having a second drive shaft (22), the second drive shaft (22) being connected to the first drive shaft (11); A test driver (4), the test driver (4) comprising a second inverter group (41), the second inverter group (41) being electrically connected to the first rectifier group (31) and the second motor (2) respectively, the second inverter group (41) being used to control the frequency of the second motor (2); when the first drive shaft (11) drives the second drive shaft (22) to rotate so that the second motor (2) is used as a generator, the second inverter group (41) rectifies the electric energy generated by the second motor (2).

2. The motor driver test system according to claim 1, characterized in that: The driver to be tested (3) further comprises a first controller, the first controller being used to send a first switching signal to the first inverter group (32), so that the first inverter group (32) controls the first motor (1) to rotate at a first preset frequency; The test driver (4) further comprises a second controller, the second controller being used to send a second switch signal to the second inverter group (41), so that when the first drive shaft (11) drives the second drive shaft (22) to rotate, the second inverter group (41) controls the frequency of the second motor (2) to be reduced.

3. The motor driver testing system according to claim 2, characterized in that: The motor driver test system further comprises a current detection module, wherein the current detection module is used to detect the output current of the driver (3) to be tested.

4. The motor driver testing system according to claim 3, characterized in that: The motor driver test system further comprises a monitoring device (5), wherein the monitoring device (5) is electrically connected to the current detection module, the first controller and the second controller; The monitoring device (5) is configured to perform the following steps: Controlling the first controller to send the first switch signal to the first inverter group (32), so that the first inverter group (32) controls the first motor (1) to rotate at the first preset frequency; Controlling the second controller to send the second switch signal to the second inverter group (41), so that when the first drive shaft (11) drives the second drive shaft (22) to rotate, the second inverter group (41) controls to reduce the frequency of the second motor (2); When it is detected that the output current of the driver to be tested (3) reaches the rated current, it is monitored whether the output current of the driver to be tested (3) within a preset time is within the rated current range.

5. The motor driver testing system according to claim 4, characterized in that: The driver to be tested (3) further comprises an alarm module, and when the output current of the driver to be tested (3) is higher than the upper limit value of the rated current range, the alarm module issues an alarm prompt; The monitoring device (5) is further configured to, after monitoring whether the output current of the driver to be tested (3) is within the rated current range within a preset time, control the second controller to send a signal to the second inverter group (41) again, so that the second inverter group (41) controls to continue to reduce the frequency of the second motor (2); Determine the time when the alarm module issues an alarm prompt.

6. The motor driver testing system according to claim 1, characterized in that: The motor driver test system further comprises a monitoring device (5), the driver to be tested (3) further comprises a communication port, the monitoring device (5) is electrically connected to the driver to be tested (3) via the communication port and transmits and receives data, and the monitoring device (5) monitors the packet loss rate of the transmitted and received data.

7. The motor driver testing system according to claim 6, characterized in that: The monitoring device (5) applies a first voltage value to the communication port, the driver to be tested (3) transmits the received first voltage value to the monitoring device (5) in a communication manner to form a second voltage value, and the monitoring device (5) monitors whether the first voltage value and the second voltage value are the same.

8. The motor driver testing system according to claim 1, characterized in that: The motor driver test system further comprises a monitoring device (5), the driver to be tested (3) further comprises a display module, the monitoring device (5) is communicatively connected to the display module, and the monitoring device (5) is configured as follows: Sending the content to be displayed to the display module; Monitor whether the display content of the display module is the same as the content to be displayed sent by the monitoring device (5).

9. A control method for a motor driver test system, characterized in that: Applied to the motor driver test system according to any one of claims 1 to 8, the control method comprises: S100, the first motor is powered on, and the first inverter group is controlled to be on and off so that the first motor rotates at a first preset frequency; S200, controlling the on and off of the second inverter group to reduce the frequency of the second motor; S300: When it is detected that the output current of the driver to be tested reaches the rated current, monitor whether the output current of the driver to be tested is within a rated current range within a preset time.

10. The control method according to claim 9, characterized in that: The driver to be tested (3) comprises an alarm module, and when the output current of the driver to be tested (3) is higher than the upper limit value of the rated current range, the alarm module issues an alarm prompt, and the control method comprises: S400, controlling the on and off of the second inverter group to reduce the frequency of the second motor, and determining the time when the alarm module issues an alarm prompt.

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