Power module reactive aging test method, device and system

Abstract

The application relates to a power module reactive aging test method, device and system. According to current working condition step parameters in a driving working condition step list, corresponding configuration parameters are sent to an execution terminal. After it is determined according to feedback information of the execution terminal that each working condition setting meets requirements, the power module is subjected to corresponding aging test according to a working condition type in the current working condition step parameters. After the power module is tested, working condition step parameters of a next step in the driving working condition step list are obtained. When there is parameter change, the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step. After the configuration parameter switching is completed, the working condition step parameters of the next step are taken as new current working condition step parameters. The power module is subjected to corresponding aging test according to the working condition type in the current working condition step parameters again. Until corresponding test of all working condition step parameters in the driving working condition step list is completed, time and labor are saved, and test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power module testing, in particular to a power module reactive aging test method, device and system. BACKGROUND

[0002] In the field of semiconductor testing, the reactive aging test of power modules such as IGBT and SIC is an important test link in the high-end application field of semiconductors. The test working principle is to simulate the real aging conditions in the vehicle running in the factory by building a test bench device, which is used for performance testing of power modules in the design and manufacturing stage and for removing defective products to control the quality of power semiconductor devices.

[0003] In the traditional power module aging test, in order to test under multiple working conditions (such as testing the same group of power modules under input DC400V and input DC500V), the power module must be placed in the test machine after the first test is completed, a new working condition file is imported, and the module is repeatedly put into the machine for testing until all working condition tests are completed. It is time-consuming and labor-intensive, and has the disadvantage of low test efficiency. SUMMARY

[0004] Therefore, it is necessary to provide a power module reactive aging test method, device and system that can improve test efficiency in view of the above problems.

[0005] The first aspect of the present application provides a power module reactive aging test method, comprising:

[0006] According to the current working condition step parameters in the driving working condition step list, the corresponding configuration parameters are sent to the execution terminal, and the feedback information sent by the execution terminal after completing the related working condition setting of the power module according to the configuration parameters is received;

[0007] After determining that each working condition setting meets the requirements according to the feedback information, the power module is subjected to corresponding aging test according to the working condition type in the current working condition step parameters;

[0008] After completing the test on the power module, the working condition step parameters of the next step in the driving working condition step list are obtained, and the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step when there is parameter change;

[0009] After completing the configuration parameter switching, the working condition step parameters of the next step are taken as new current working condition step parameters, and the step of performing corresponding aging test on the power module according to the working condition type in the current working condition step parameters is returned, until all working condition step parameters in the driving working condition step list are tested.

[0010] In one of the embodiments, the execution terminal comprises:

[0011] The lower computer electric drive module is responsible for driving control, voltage and current collection, and driving fault judgment during aging test;

[0012] The lower computer PLC is responsible for test process action control;

[0013] The water cooling machine is responsible for water passing and blowing, water flow and water temperature adjustment, and guaranteeing the constancy of test environment temperature;

[0014] The high-voltage power supply is responsible for providing high-voltage input.

[0015] In one of the embodiments, according to the current working condition step parameter in the driving working condition step list, the corresponding configuration parameter is sent to the execution terminal, and the feedback information sent by the execution terminal after the relevant working condition setting of the power module according to the configuration parameter is received, including:

[0016] According to the current working condition step parameter, when the water passing enable is turned on, the corresponding water temperature value, water flow value and water passing start instruction are sent to the water cooling machine;

[0017] When the output water temperature and water flow read back from the water cooling machine are within the set value range, the corresponding driving parameter and protection value parameter are sent to the lower computer electric drive module;

[0018] When the driving parameter and protection value parameter setting of the lower computer electric drive module is completed, the control instruction is sent to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and high-voltage discharge relay, attract the high-voltage negative relay and high-voltage pre-charge relay;

[0019] When the relay state returned by the lower computer PLC is consistent with the control instruction issued, the current working condition step voltage value instruction is sent to the high-voltage power supply;

[0020] When the output voltage of the high-voltage power supply is consistent with the current working condition step voltage value instruction, the control instruction is sent to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage discharge relay and high-voltage pre-charge relay, and attract the high-voltage positive relay and high-voltage negative relay;

[0021] When the relay state fed back by the lower computer PLC is consistent with the control instruction issued, it is determined that each working condition setting meets the requirements.

[0022] In one of the embodiments, the parameter change includes at least one of voltage change, water passing enable change, water flow change, water temperature change, working condition type change, and working condition driving parameter and protection value parameter change.

[0023] In one of the embodiments, the parameter change includes voltage change; the switching of the configuration parameters of the execution terminal according to the working condition step parameters of the next step includes:

[0024] sending a control instruction to stop the driving of the lower computer electric drive module, and after reading back that the driving state of the lower computer electric drive module is stopped, analyzing whether the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step;

[0025] if the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step, sending a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charge relay;

[0026] if the voltage value of the next working condition step is less than the voltage value of the current working condition step, sending a control instruction to the high-voltage power supply to control the high-voltage power supply to stop outputting voltage;

[0027] when reading back that the state of the high-voltage power supply is to stop outputting voltage, sending a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay, the high-voltage negative relay and the high-voltage pre-charge relay, and attract the high-voltage discharge relay;

[0028] when the relay state fed back by the lower computer PLC is consistent with the control instruction issued, and the high-voltage discharge reaches the set safety voltage, performing the step of sending a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charge relay.

[0029] In one of the embodiments, after sending a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charge relay, the method further includes:

[0030] when the relay state fed back by the lower computer PLC is consistent with the control instruction issued, sending the voltage value of the next working condition step to the high-voltage power supply;

[0031] when the output voltage of the high-voltage power supply matches the voltage value of the next working condition step, sending a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage discharge relay and the high-voltage pre-charge relay, and attract the high-voltage positive relay and the high-voltage negative relay;

[0032] when the relay state fed back by the lower computer PLC is consistent with the control instruction issued, the voltage switching is completed.

[0033] In one of the embodiments, the parameter change includes water flow change; the switching of the configuration parameters of the execution terminal according to the working condition step parameters of the next step includes:

[0034] sending an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving;

[0035] when reading back that the driving state of the lower computer electric drive module stops, sending the water flow value of the next working condition step to the water cooler;

[0036] when reading back that the output water flow of the water cooler matches the water flow value of the next working condition step, the water flow switching is completed.

[0037] In one of the embodiments, the parameter change includes water temperature change; the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step, including:

[0038] sending an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving;

[0039] when reading back that the driving state of the lower computer electric drive module stops, sending the water temperature value of the next working condition step to the water cooler;

[0040] when reading back that the output water temperature of the water cooler matches the water temperature value of the next working condition step, the water temperature switching is completed.

[0041] In one of the embodiments, the parameter change includes working condition type change; the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step, including:

[0042] when the driving type of the next working condition step is inconsistent with the driving type of the current working condition step, sending an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving;

[0043] when reading back that the driving state of the lower computer electric drive module stops, sending the driving type instruction of the next working condition step to the lower computer electric drive module;

[0044] when reading back that the driving type of the lower computer electric drive module matches the driving type instruction of the next working condition step, the driving type switching is completed.

[0045] In one of the embodiments, the parameter change includes working condition driving parameter and protection value parameter change; the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step, including:

[0046] sending the driving parameter and protection value parameter instruction of the next working condition step to the lower computer electric drive module;

[0047] when reading back that the driving parameter and protection value parameter of the lower computer electric drive module matches the driving parameter and protection value parameter instruction of the next working condition step, the working condition driving parameter and protection value parameter switching is completed.

[0048] In one of the embodiments, the parameter change includes a water passing enable change; the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step, including:

[0049] sending an instruction to the lower computer electric drive module to stop driving, and when the driving state of the lower computer electric drive module is read back to stop, detecting whether the water passing enable of the next working condition step is opened;

[0050] If yes, sending the water temperature value, water flow value and open water passing instruction of the next working condition step to the water cooler, and when the output water temperature and water flow of the water cooler are read back to match the water temperature value and water flow value issued, the water passing enable switching is completed;

[0051] If no, sending a water blowing instruction to the water cooler, and when the water cooler is in a water blowing state, waiting for the water blowing to be completed according to the set water blowing time and no fault occurs within the waiting time, and the water passing enable switching is completed.

[0052] In one of the embodiments, the method further includes:

[0053] During the test process, the lower computer electric drive module performs fault monitoring according to the protection value set according to the current working condition step, and performs alarm shutdown when a fault is detected.

[0054] In one of the embodiments, the method further includes:

[0055] According to the received editing instruction, editing operation is performed on the driving working condition step list; the editing operation includes at least one of adding a driving working condition step, deleting a driving working condition step and updating a driving working condition step.

[0056] The second aspect of the present application provides a power module reactive aging test device, comprising:

[0057] A parameter configuration module is configured to send corresponding configuration parameters to the execution terminal according to the current working condition step parameters in the driving working condition step list, and receive feedback information sent by the execution terminal after the related working conditions of the power module are set according to the configuration parameters;

[0058] A test control module is configured to perform corresponding aging tests on the power module according to the working condition type in the current working condition step parameters after determining that each working condition setting meets the requirements according to the feedback information;

[0059] a parameter switching module, configured to obtain the working condition step parameter of the next step in the driving working condition step list after the power module is tested, and switch the configuration parameter of the execution terminal according to the working condition step parameter of the next step when there is a parameter change; after the configuration parameter switching is completed, the working condition step parameter of the next step is taken as a new current working condition step parameter, and the test control module is caused to perform corresponding aging test on the power module according to the working condition type in the current working condition step parameter again until corresponding tests of all working condition step parameters in the driving working condition step list are completed.

[0060] The third aspect of the application provides a power module reactive aging test system, comprising a host computer, an industrial computer and an execution terminal, the execution terminal communicates with the host computer through the industrial computer, and the host computer performs power module reactive aging test according to the method.

[0061] The power module reactive aging test method, device and system are configured to send corresponding configuration parameters to the execution terminal according to the current working condition step parameter in the driving working condition step list, and receive feedback information sent by the execution terminal after the execution terminal completes the related working condition setting of the power module according to the configuration parameter. After it is determined that each working condition setting meets the requirements according to the feedback information, the power module is tested according to the working condition type in the current working condition step parameter. After the power module is tested, the working condition step parameter of the next step in the driving working condition step list is obtained, and the configuration parameter of the execution terminal is switched according to the working condition step parameter of the next step when there is a parameter change. After the configuration parameter switching is completed, the working condition step parameter of the next step is taken as a new current working condition step parameter, and the power module is tested again according to the working condition type in the current working condition step parameter until corresponding tests of all working condition step parameters in the driving working condition step list are completed. The power module and the imported working condition file do not need to be placed multiple times, time and labor are saved, and the test efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0062] Figure 1 It is a flowchart of the power module reactive aging test method in one embodiment;

[0063] Figure 2 It is a general framework diagram of the power module reactive aging test system in one embodiment;

[0064] Figure 3 It is a general operation flowchart of working condition editing in one embodiment;

[0065] Figure 4 It is a working condition adding flowchart in one embodiment;

[0066] Figure 5 It is a working condition deleting flowchart in one embodiment;

[0067] Figure 6 for an embodiment of the updating working condition flowchart;

[0068] Figure 7 for an embodiment of the total flowchart of the power module reactive aging test;

[0069] Figure 8 for an embodiment of the aging test switching voltage flowchart;

[0070] Figure 9 for an embodiment of the aging test switching water flow flowchart;

[0071] Figure 10 for an embodiment of the aging test switching water temperature flowchart;

[0072] Figure 11 for an embodiment of the aging test switching working condition type flowchart;

[0073] Figure 12 for an embodiment of the aging test driving parameter and protection parameter switching flowchart;

[0074] Figure 13 for an embodiment of the aging test switching water enable flowchart;

[0075] Figure 14 for an embodiment of the structure block diagram of the power module reactive aging test device;

[0076] Figure 15 for an embodiment of the electrical structure diagram of the power module reactive aging test system. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0078] In one embodiment, as shown in Figure 1 a power module reactive aging test method is provided, comprising:

[0079] Step S110: according to the current working condition step parameters in the driving working condition step list, sending the corresponding configuration parameters to the execution terminal, and receiving the feedback information sent by the execution terminal after completing the related working condition setting of the power module according to the configuration parameters.

[0080] Specifically, the driving condition step list stores a plurality of sets of condition step parameters, each of which is used to set the condition state of the power module and perform corresponding aging test on the power module. When performing the aging test, the host computer selects the current condition step parameter according to the order of the condition step parameters in the driving condition step list, for example, the first condition step parameter in the driving condition step list is selected as the current condition step parameter at the beginning of the test, and the corresponding configuration parameters are sent to the execution terminal. After the execution terminal sets the condition of the power module according to the configuration parameters, the corresponding feedback information is sent to the host computer, so that the host computer knows whether the condition setting is completed.

[0081] As shown in Figure 2 , the host computer as the main control party communicates with the execution terminal through the industrial computer and dominates all test processes. According to different condition setting requirements of the power module, the specific structure of the execution terminal will also be different. In this embodiment, the execution terminal includes: a lower computer electric drive module responsible for driving control, voltage and current collection, and driving fault judgment during aging test; a lower computer PLC responsible for test process action control; a water chiller responsible for water supply and water blowing, water flow and water temperature adjustment, and ensuring the constancy of the test environment temperature; and a high-voltage power supply, specifically a DC high-voltage power supply, responsible for providing high-voltage input.

[0082] In one embodiment, the method further comprises: performing editing operation on the driving condition step list according to the received editing instruction; and the editing operation comprises at least one of adding driving condition step, deleting driving condition step and updating driving condition step.

[0083] Before formal aging test, the test condition file must be edited on the host computer interface according to the tested condition. Figure 3 As shown in Figure 4 , in order to realize higher degree of freedom of condition test, in the editing of the condition test file, the related operations are adding driving condition step, deleting driving condition step, updating driving condition step, binding a condition type and a set of driving value, protection value, power module performance judgment value and other related parameters into a whole as a set of condition step parameters, and then performing addition, deletion and modification operations (addition: as shown in Figure 5 , deletion: as shown in Figure 6 , and modification: as shown in

[0084] Step S120: after determining that each condition setting meets the requirements according to the feedback information, performing corresponding aging test on the power module according to the condition type in the current condition step parameter.

[0085] The working condition types can specifically include driving working condition aging and locked-rotor working condition aging. When the host computer determines, according to the received feedback information, that the working condition state of the power module is consistent with the theoretical state corresponding to the configuration parameter issued, it is determined that each working condition setting meets the requirements, and the power module is subjected to corresponding aging tests according to the working condition type in the working condition step parameter of the next step.

[0086] Step S130: After the test on the power module is completed, the working condition step parameter of the next step in the driving working condition step list is acquired, and the configuration parameter of the execution terminal is switched according to the working condition step parameter of the next step when there is a parameter change.

[0087] Specifically, after the host computer completes the current aging test on the power module, the first working condition step parameter in the driving working condition step list is discarded, the next working condition step parameter is promoted to the new first working condition step parameter, and then it is determined whether there is a change in the current first working condition step parameter and the working condition step parameter that has been tested. When there is a parameter change, the configuration parameter of the execution terminal is switched according to the current first working condition step parameter. It can be understood that in other embodiments, after the current aging test on the power module is completed, the working condition step parameter that has been tested in the driving working condition step list can also not be discarded, and the working condition step parameter of the next step can be directly found according to the sequence to determine whether there is a parameter change.

[0088] Step S140: After the configuration parameter switching is completed, the working condition step parameter of the next step is taken as the new current working condition step parameter, and the step of performing corresponding aging tests on the power module according to the working condition type in the current working condition step parameter is returned until the corresponding tests of all working condition step parameters in the driving working condition step list are completed.

[0089] After the host computer completes the configuration parameter switching, the step of performing corresponding aging tests on the power module according to the working condition type in the new current working condition step parameter in step S120 is executed again, and this cycle is repeated until each set of working condition step parameters in the driving working condition step list completes the corresponding aging test. It can be understood that if there is no parameter change in the working condition step parameter of the next step, the configuration parameter switching is not required, and the corresponding aging tests on the power module are directly performed according to the working condition type in the new current working condition step parameter.

[0090] Thus, when a group of power modules is to be tested under multiple working conditions, it is not necessary to repeatedly import the working condition files or to repeatedly take the modules out of the device and put them back in. Before testing, the multiple group of working condition step parameters are set in one working condition file at one time, and during the testing, the test program corresponding to each group of working condition step parameters is executed in sequence according to the list order. Before each test program is executed, the host computer judges whether the configuration parameters of each group are set correctly. If there is a mistake, an alarm is given in time to improve the safety factor. When the configuration parameters do not change, the configuration parameter switching is not necessary. When the parameters change, the system automatically configures the new parameters and completes the new test program until all the working condition steps in the list are executed. In this way, the test efficiency is greatly improved, and the comprehensiveness of the test working conditions in one test process is improved. The user can also edit the test working condition file to add, delete or modify the editing operation, so that various test working conditions can be freely combined to improve the flexibility of the aging test. Because each group of test working condition parameters is independently set, the protection parameters under different working conditions can also be independently set. The lower computer electric drive module performs real-time fault monitoring according to the protection parameters corresponding to the current working condition during the test, and stops in time when there is a fault. In this way, the segmented protection function can be realized. Compared with the prior art, only one set of protection parameters can be set in the entire aging test period, which may lead to the failure to identify the abnormality, and the safety is greatly improved.

[0091] In one embodiment, as shown in FIG. 1, Figure 7 Step S110 includes:

[0092] Step 11: When the water passing enable is turned on according to the current working condition step parameters, send the corresponding water temperature value, water flow value, and open water passing instruction to the water cooler. For ease of understanding, take the first working condition step as the current working condition step as an example. If the water passing enable of the first working condition step is turned on, the host computer sends the water temperature value, water flow value, and open water passing instruction of the first working condition step to the water cooler. If the water passing enable of the first working condition step is not turned on, the host computer directly jumps to sending the corresponding drive parameters and protection value parameters to the lower computer electric drive module.

[0093] Step 12: When the output water temperature and water flow rate feedback by the water cooler are within the set value range, send the corresponding drive parameters and protection value parameters to the lower computer electric drive module. The set value range can be determined according to the drive parameters and protection value parameters and the corresponding allowable error. If the output water temperature and water flow rate feedback by the water cooler are within the set value range, the host computer sends the drive parameters and protection value parameters of the first working condition step to the lower computer electric drive module. If the output water temperature and water flow rate feedback by the water cooler are not within the set value range, the host computer alarms and stops.

[0094] Step 13: When reading the drive parameters and protection value parameter settings of the lower computer electric drive module is completed, send control instructions to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay, high-voltage discharge relay, and attract the high-voltage negative relay and high-voltage pre-charging relay. If the drive parameters and protection value parameters set by the lower computer electric drive module are consistent with the required parameters, the upper computer sends control instructions to the lower computer PLC to disconnect the high-voltage positive relay, high-voltage discharge relay, and attract the high-voltage negative relay and high-voltage pre-charging relay. If the parameter settings are inconsistent, the upper computer will alarm and stop.

[0095] Step 14: When the relay state returned by the lower computer PLC is consistent with the control instructions issued, send the current working condition step voltage value instruction to the high-voltage power supply. If the relay state returned by the lower computer PLC is consistent with the control instructions issued, the upper computer sends the first working condition step voltage value instruction to the high-voltage power supply. If the relay state is inconsistent with the control instructions issued, the upper computer will alarm and stop.

[0096] Step 15: When the output voltage of the high-voltage power supply is consistent with the current working condition step voltage value instruction, send control instructions to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage discharge relay and high-voltage pre-charging relay, and attract the high-voltage positive relay and high-voltage negative relay. If the output voltage of the high-voltage power supply is within the corresponding set value range, it is considered that the output voltage of the high-voltage power supply is consistent with the first working condition step voltage value instruction, and the upper computer issues control instructions to control the lower computer PLC to disconnect the high-voltage discharge relay and high-voltage pre-charging relay, and attract the high-voltage positive relay and high-voltage negative relay. If the output voltage of the high-voltage power supply is inconsistent with the first working condition step voltage value instruction, the upper computer will alarm and stop.

[0097] Step 16: When the relay state feedback of the lower computer PLC is consistent with the control instructions issued, determine that the settings of each working condition meet the requirements. If the relay state feedback of the lower computer PLC is consistent with the control instructions issued, it is determined that the settings of each working condition meet the requirements, otherwise the upper computer will alarm and stop.

[0098] As Figure 15As shown, the high-voltage power supply (such as a DC power supply) is connected to the high-voltage distribution box, and the high-voltage distribution box is connected to the power module (such as a power semiconductor device) through a thin-film capacitor. The high-voltage positive relay K1, the high-voltage pre-charge relay K2, the high-voltage negative relay K3, and the high-voltage discharge relay K4 are all arranged in the high-voltage distribution box. The high-voltage distribution box can also include a fuse FU1, a pre-charge resistor R1, and a discharge resistor R2. Among them, the high-voltage positive relay K1 and the high-voltage negative relay K3 are arranged in the positive output loop (+) and the negative output loop (-) of the power module, respectively, and the fuse FU1 is also arranged in the positive output loop to prevent excessive current from damaging components and equipment. By controlling the on-off of the high-voltage positive relay K1 and the high-voltage negative relay K3, it can be controlled whether to supply high voltage to the power module. The high-voltage pre-charge relay K2 is connected in parallel with the high-voltage positive relay K1 after being connected in series with the pre-charge resistor R1, and when the high-voltage pre-charge relay K2 is closed and the high-voltage positive relay K1 is turned off, the output current and voltage in the positive output loop can be reduced. The high-voltage discharge relay K4 is connected in series with the discharge resistor R2, one end of which is connected to the positive output loop and the other end is connected to the negative output loop, and is turned on for pressure relief after the aging test is completed. The above relays are directly controlled by the lower computer PLC, and can also be indirectly controlled by sending control instructions from the upper computer to the lower computer PLC.

[0099] In one embodiment, the method further comprises: during the test process, the lower computer electric drive module detects faults according to the protection values set according to the current working condition step, and alarms and stops when a fault is detected.

[0100] Referring to Figure 7 When the power module is placed in the test system for aging test, the upper computer executes the single step condition in the drive condition step list in turn. When entering the test for the first time, the upper computer first communicates with the water cooler, the lower computer electric drive module, the lower computer PLC, and the high-voltage power supply according to the first step parameter in the drive condition step list, and first makes the flow and water temperature reach the stable range. If the first step does not open the water enablement, it directly skips the process of interacting with the water cooler. Then, the drive parameters and protection parameters are set for the lower computer electric drive module, the aging test is prepared, and the drive is monitored for abnormalities. Then, the lower computer PLC and the high-voltage power supply are communicated together to make the power module input set high voltage. Finally, according to the selected working condition type in the working condition step, the drive working condition aging or the locked-rotor working condition aging is performed. When an aging step is completed, the first working condition step parameter in the drive condition step list is discarded. If the drive condition step list is empty at this time, it means that all the working condition steps have been executed, and the entire aging test is completed. If the drive condition step list is not empty at this time, there are still working condition steps, the first step in the remaining working condition steps is promoted to the first working condition step, and then it is judged whether the current first working condition step and the working condition step parameter just completed have changed.

[0101] The parameter changes during the entire aging test procedure are divided into six types: 1. voltage change, 2. water enable change, 3. water flow change, 4. water temperature change, 5. working condition type change, and 6. working condition driving parameter and protection value parameter change. If one or more of the parameters change, the procedure for switching the corresponding parameters is jumped to, such as Figure 8 the aging test switching voltage procedure, Figure 9 the aging test switching water flow procedure, Figure 10 the aging test switching water temperature procedure, Figure 11 the aging test switching working condition type procedure, Figure 12 the aging test driving parameter and protection parameter switching procedure, and Figure 13 the aging test switching water enable procedure. After the switching of all the changed procedures is completed, the corresponding driving aging test or locked-rotor aging test is performed according to the current first step working condition type, until there is no working condition step in the driving working condition step list, and the entire aging test is completed. During the entire aging test period, the lower computer electric drive module judges in real time whether there is an abnormality according to the latest protection value set by the current working condition step, and timely alarms to stop the power module and the test system.

[0102] In one embodiment, the parameter change includes voltage change. As shown in Figure 8 in step S130, the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step, including:

[0103] Step 31: send a control instruction to control the lower computer electric drive module to stop driving, and after reading back to determine that the driving state of the lower computer electric drive module is stopped, analyze whether the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step. When the voltage needs to be switched, the upper computer first sends a control instruction to control the lower computer electric drive module to stop driving, and after reading back to determine that the driving state of the lower computer electric drive module is stopped, compares whether the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step. If the driving state of the lower computer electric drive module is not stopped, the upper computer alarms to stop.

[0104] Step 32: if the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step, send a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charge relay. When the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step, the upper computer sends a control instruction to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charge relay. As shown in Figure 15As shown, in the high-voltage rising stage, the DC power supply outputs a large voltage instantaneously, which may cause a short circuit of the entire loop. To prevent damage to components and equipment, the high voltage is pre-charged to a voltage stabilization, the high-voltage pre-charging relay K2 and the high-voltage negative relay K3 are attracted, the high-voltage positive relay K1 and the high-voltage discharge relay K4 are disconnected, the pre-charging resistor R1 in the loop consumes energy, and after the voltage output is stabilized, the high-voltage positive relay K1 is attracted, the high-voltage pre-charging relay K2 is disconnected, and then the test is performed.

[0105] Step 33: If the next working condition step voltage value is less than the current working condition step voltage value, send a command to the high-voltage power supply to control the high-voltage power supply to stop outputting voltage. When the next working condition step voltage value is less than the current working condition step voltage value, the host computer sends a command to the high-voltage power supply to control the high-voltage power supply to stop outputting voltage, so as to perform the next step of pressure relief operation.

[0106] Step 34: When the high-voltage power supply is read to stop outputting voltage, send a control command to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay, the high-voltage negative relay and the high-voltage pre-charging relay, and attract the high-voltage discharge relay. If the high-voltage power supply stops outputting voltage, the host computer sends a control command to the lower computer PLC to disconnect the high-voltage positive relay, the high-voltage negative relay and the high-voltage pre-charging relay, and attract the high-voltage discharge relay. If the high-voltage power supply does not stop outputting voltage, the host computer alarms and stops. As Figure 15 As shown, in the high-voltage discharge stage, after the DC power supply stops outputting, there is still energy in the loop because the loop contains capacitor devices, so it is necessary to discharge the voltage in the loop. The high-voltage discharge relay K4 is attracted, the high-voltage positive relay K1, the high-voltage pre-charging relay K2 and the high-voltage negative relay K3 are disconnected, and the energy is released through the discharge resistor R2.

[0107] Step 35: When the relay state fed back by the lower computer PLC is consistent with the control command issued, and the high-voltage is discharged to the set safety voltage, execute the step of sending a control command to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charging relay in step 32. If the relay state is not consistent with the control command issued, or the system high-voltage is not discharged to the safety voltage, the host computer alarms and stops.

[0108] Further, after the control command is sent to the lower computer PLC to control the lower computer PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and attract the high-voltage negative relay and the high-voltage pre-charging relay in step 32, step S130 further includes:

[0109] Step 36: When the relay state fed back by the lower computer PLC is consistent with the control instruction issued, send the next step voltage value to the high-voltage power supply. If the relay state fed back by the lower computer PLC is consistent with the control instruction issued, the upper computer sends the next step voltage value to the high-voltage power supply; if the relay state fed back by the lower computer PLC is inconsistent with the control instruction issued, the upper computer alarms and stops.

[0110] Step 37: When the output voltage of the high-voltage power supply matches the next step voltage value, send the control instruction to the lower computer PLC to open the high-voltage discharge relay and the high-voltage pre-charge relay, and attract the high-voltage positive relay and the high-voltage negative relay. If the output voltage of the high-voltage power supply is equal to the next step voltage value, or the difference is within the allowed range (i.e. the output voltage is within the set value range), it is considered that the two match, and the upper computer sends the control instruction to the lower computer PLC to open the high-voltage discharge relay and the high-voltage pre-charge relay, and attract the high-voltage positive relay and the high-voltage negative relay; if the two do not match, the upper computer alarms and stops.

[0111] Step 38: When the relay state fed back by the lower computer PLC is consistent with the control instruction issued, the voltage switching is completed. If the relay state fed back by the lower computer PLC is consistent with the control instruction issued, the voltage switching is completed. If the relay state fed back by the lower computer PLC is inconsistent with the control instruction issued, the upper computer alarms and stops.

[0112] In one embodiment, the parameter change includes a water flow change. As shown in FIG. 1, in step S130, the configuration parameters of the execution terminal are switched according to the next step working condition step parameters, including: Figure 9

[0113] Step 41: Send the instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving. When the water flow needs to be switched, the upper computer first sends the instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving.

[0114] Step 42: When the driving state of the lower computer electric drive module is read back to stop, send the next step water flow value to the water cooler. When the lower computer electric drive module stops driving, the upper computer sends the next step water flow value to the water cooler. If the lower computer electric drive module does not stop driving, the upper computer alarms and stops.

[0115] Step 43: When the output water flow of the water cooler matches the next step water flow value, the water flow switching is completed. If the output water flow of the water cooler is equal to the next step water flow value, or the difference is within the allowed range (i.e. the output water flow is within the set range), it is considered that the two match, and the water flow switching is completed. If the two do not match, the upper computer alarms and stops. ​

[0116] In one embodiment, the parameter change includes a water temperature change. As shown in FIG. 1, the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step in step S130, including: Figure 10

[0117] Step 51: send an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving. When the water temperature needs to be switched, the upper computer first sends an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving.

[0118] Step 52: when the driving state of the lower computer electric drive module is read back to stop, send the next working condition step water temperature value to the water cooler. When the lower computer electric drive module stops driving, the upper computer sends the next working condition step water temperature value to the water cooler. If the lower computer electric drive module does not stop driving, the upper computer alarms and stops.

[0119] Step 53: when the output water temperature of the water cooler matches the next working condition step water temperature value, the water temperature switching is completed. If the output water temperature of the water cooler is equal to the next working condition step water temperature value, or the difference is within the allowed range (i.e., the output water temperature is within the set range), it is considered that the two match, and the water temperature switching is completed. If the two do not match, the upper computer alarms and stops.

[0120] In one embodiment, the parameter change includes a working condition type change. As shown in FIG. 1, the configuration parameters of the execution terminal are switched according to the working condition step parameters of the next step in step S130, including: Figure 11

[0121] Step 61: when the next working condition step driving type is inconsistent with the current working condition step driving type, send an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving. If the next working condition step driving type is inconsistent with the current working condition step driving type, the upper computer first sends an instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving.

[0122] Step 62: when the driving state of the lower computer electric drive module is read back to stop, send the next working condition step driving type instruction to the lower computer electric drive module. When the lower computer electric drive module stops driving, the upper computer sends the next working condition step driving type instruction to the lower computer electric drive module. If the lower computer electric drive module does not stop driving, the upper computer alarms and stops.

[0123] Step 63: when the driving type of the lower computer electric drive module matches the next working condition step driving type instruction, the driving type switching is completed. When the upper computer reads back that the driving type of the lower computer electric drive module matches the next working condition step driving type instruction, the driving type switching is completed; otherwise, the upper computer alarms and stops.

[0124] ​​In one embodiment, the parameter change includes the operating condition driving parameter and protection value parameter change. As shown in Figure 12 The step S130 switches the configuration parameters of the execution terminal according to the operating condition step parameter of the next step, including:

[0125] Step 71: send the next operating condition step driving parameter and protection value parameter instruction to the lower computer electric drive module. When the driving parameter and protection value parameter need to be switched, the upper computer sends the next operating condition step driving parameter and protection value parameter instruction to the lower computer electric drive module.

[0126] Step 72: when the driving parameter and protection value parameter read back from the lower computer electric drive module are consistent with the next operating condition step driving parameter and protection value parameter instruction, the operating condition driving parameter and protection value parameter switching is completed. When the driving parameter and protection value parameter read back from the lower computer electric drive module are consistent with the next operating condition step driving parameter and protection value parameter instruction, the parameter switching is completed; otherwise, the upper computer alarms and stops.

[0127] In one embodiment, the parameter change includes the water passing enable change. As shown in Figure 13 The step S130 switches the configuration parameters of the execution terminal according to the operating condition step parameter of the next step, including:

[0128] Step 81: send the instruction to the lower computer electric drive module to stop driving, and when the driving state of the lower computer electric drive module is stopped, detect whether the next operating condition step water passing enable is opened. When the water passing enable needs to be switched, the upper computer first sends the instruction to the lower computer electric drive module to control the lower computer electric drive module to stop driving. If the lower computer electric drive module stops driving, whether the next operating condition step water passing enable is opened is detected, if yes, step 82 is executed; if no, step 83 is executed. If the lower computer electric drive module does not stop driving, the upper computer alarms and stops.

[0129] Step 82: send the next operating condition step water temperature value, water flow value and open water passing instruction to the water cooler, and when the output water temperature and water flow of the water cooler read back match the water temperature value and water flow value issued, the water passing enable switching is completed. The upper computer sends the next operating condition step water temperature value, water flow value and open water passing instruction to the water cooler, and if the output water temperature and water flow of the water cooler read back match the water temperature value and water flow value issued, or the error is within the allowable range (i.e. the output water temperature and water flow of the water cooler are within the set range), the water passing enable switching is completed. If there is no value matching, the upper computer can also alarm and stop.

[0130] Step 83: send the blowing water instruction to the water cooling machine, when reading back that the water cooling machine is in the blowing water state, wait for the blowing water to complete according to the set blowing water time and no fault occurs in the waiting time, and the water enabling switching is completed. The specific duration of the blowing water time is not unique and can be set according to actual test needs. After the host computer sends the blowing water instruction to the water cooling machine, if it reads back that the water cooling machine is in the blowing water state, it waits for the blowing water to complete according to the set blowing water time, and monitors whether the system has a fault during the waiting time. If no fault occurs, the water enabling switching is completed. If it reads back that the water cooling machine is not in the blowing water state, or a fault occurs in the system during the waiting time, the host computer alarms and stops.

[0131] The power module no-load aging test method has the following advantages:

[0132] Advantage 1: high efficiency. The corresponding test conditions are edited according to the required test conditions at one time, the power module only needs to be placed into the test machine once, and the equipment will automatically execute the process according to the edited test conditions, and finally the final result is issued.

[0133] Advantage 2: comprehensive test condition. The working condition type, driving parameter, protection value, and power module performance judgment value are freely combined and arbitrarily matched according to the steps.

[0134] Advantage 3: fast protection speed. The host computer sends the protection value to the lower computer, which automatically judges by itself, saving communication time and improving protection speed.

[0135] Advantage 4: protection in full cycle. Each test condition step has its own set of protection values, which can be adjusted according to the size of the driving current executed by the step.

[0136] Advantage 5: can execute the no-water aging test process. The no-water aging test has the following advantages: due to no-water heat dissipation, the temperature of the power module will rise rapidly during the aging test, and different temperature protection values can be set to quickly determine the maximum junction temperature that the power module can withstand.

[0137] It should be understood that although each step in the flowchart involved in each embodiment as described above is displayed in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily sequential, but can be executed in rotation or alternation with at least part of other steps or steps or stages in other steps.

[0138] Based on the same inventive concept, the embodiments of the present application also provide a power module reactive aging test device for implementing the power module reactive aging test method described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more power module reactive aging test device embodiments provided below can refer to the limitations of the power module reactive aging test method described above, which will not be repeated here.

[0139] In one embodiment, as shown in Figure 14 A power module reactive aging test device is also provided, comprising: a parameter configuration module 110, a test control module 120 and a parameter switching module 130, wherein:

[0140] The parameter configuration module 110 is configured to send corresponding configuration parameters to the execution terminal according to the current working condition step parameters in the driving working condition step list, and receive feedback information sent by the execution terminal after the execution terminal completes the related working condition setting of the power module according to the configuration parameters.

[0141] The test control module 120 is configured to perform corresponding aging tests on the power module according to the working condition type in the current working condition step parameters after determining that each working condition setting meets the requirements according to the feedback information.

[0142] The parameter switching module 130 is configured to obtain the working condition step parameters of the next step in the driving working condition step list after completing the test on the power module, and switch the configuration parameters of the execution terminal according to the working condition step parameters of the next step when there is a parameter change; after completing the switching of the configuration parameters, the working condition step parameters of the next step are taken as new current working condition step parameters, so that the test control module 120 performs corresponding aging tests on the power module according to the working condition type in the current working condition step parameters again, until all the corresponding tests of the working condition step parameters in the driving working condition step list are completed.

[0143] In one embodiment, the parameter configuration module 110 determines to turn on the water passing enable according to the current working condition step parameter, and sends corresponding water temperature value, water flow value, and turning on water passing instruction to the water cooling machine; when the output water temperature and water flow value read back from the water cooling machine are within the set value range, the corresponding drive parameter and protection value parameter are sent to the lower machine electric drive module; when the drive parameter and protection value parameter setting of the lower machine electric drive module is completed, the control instruction is sent to the lower machine PLC to control the lower machine PLC to disconnect the high-voltage positive relay, high-voltage discharge relay, and attract the high-voltage negative relay and high-voltage pre-charging relay; when the relay state returned by the lower machine PLC is consistent with the control instruction issued, the current working condition step voltage value instruction is sent to the high-voltage power supply; when the output voltage of the high-voltage power supply is consistent with the current working condition step voltage value instruction, the control instruction is sent to the lower machine PLC to control the lower machine PLC to disconnect the high-voltage discharge relay and high-voltage pre-charging relay, and attract the high-voltage positive relay and high-voltage negative relay; when the relay state fed back by the lower machine PLC is consistent with the control instruction issued, it is determined that each working condition setting meets the requirements.

[0144] In one embodiment, the parameter change includes voltage change; the parameter switching module 130 sends an instruction to control the lower machine electric drive module to stop driving, and after reading back to determine that the driving state of the lower machine electric drive module is stopped, it is analyzed whether the next working condition step voltage value is greater than or equal to the current working condition step voltage value; if the next working condition step voltage value is greater than or equal to the current working condition step voltage value, the control instruction is sent to the lower machine PLC to control the lower machine PLC to disconnect the high-voltage positive relay and high-voltage discharge relay, and attract the high-voltage negative relay and high-voltage pre-charging relay; if the next working condition step voltage value is less than the current working condition step voltage value, an instruction is sent to the high-voltage power supply to control the high-voltage power supply to stop outputting voltage; when the state of the high-voltage power supply is read back to stop outputting voltage, the control instruction is sent to the lower machine PLC to control the lower machine PLC to disconnect the high-voltage positive relay, high-voltage negative relay, and high-voltage pre-charging relay, and attract the high-voltage discharge relay; when the relay state fed back by the lower machine PLC is consistent with the control instruction issued, and the high-voltage discharge is set to a safe voltage, the control instruction is sent to the lower machine PLC to control the lower machine PLC to disconnect the high-voltage positive relay and high-voltage discharge relay, and attract the high-voltage negative relay and high-voltage pre-charging relay.

[0145] In one embodiment, the parameter switching module 130 is further configured to send the next working condition step voltage value to the high-voltage power supply when the read-back relay state of the lower-level machine PLC is consistent with the control instruction; send the control instruction to the lower-level machine PLC when the output voltage of the high-voltage power supply matches the next working condition step voltage value, so that the lower-level machine PLC opens the high-voltage discharge relay and the high-voltage pre-charge relay, and attracts the high-voltage positive relay and the high-voltage negative relay; and complete the voltage switching when the read-back relay state of the lower-level machine PLC is consistent with the control instruction.

[0146] In one embodiment, the parameter change includes water flow change; the parameter switching module 130 sends an instruction to the lower-level electric drive module to control the lower-level electric drive module to stop driving; sends the next working condition step water flow value to the water cooler when the read-back driving state of the lower-level electric drive module is stopped; and completes the water flow switching when the output water flow of the water cooler matches the next working condition step water flow value.

[0147] In one embodiment, the parameter change includes water temperature change; the parameter switching module 130 sends an instruction to the lower-level electric drive module to control the lower-level electric drive module to stop driving; sends the next working condition step water temperature value to the water cooler when the read-back driving state of the lower-level electric drive module is stopped; and completes the water temperature switching when the output water temperature of the water cooler matches the next working condition step water temperature value.

[0148] In one embodiment, the parameter change includes working condition type change; the parameter switching module 130 sends an instruction to the lower-level electric drive module to control the lower-level electric drive module to stop driving when the next working condition step driving type is inconsistent with the current working condition step driving type; sends the next working condition step driving type instruction to the lower-level electric drive module when the read-back driving state of the lower-level electric drive module is stopped; and completes the driving type switching when the driving type of the lower-level electric drive module matches the next working condition step driving type instruction.

[0149] In one embodiment, the parameter change includes working condition driving parameter and protection value parameter change; the parameter switching module 130 sends the next working condition step driving parameter and protection value parameter instruction to the lower-level electric drive module; and completes the working condition driving parameter and protection value parameter switching when the read-back driving parameter and protection value parameter of the lower-level electric drive module matches the next working condition step driving parameter and protection value parameter instruction.

[0150] In one embodiment, the parameter change includes a water passing enable change; the parameter switching module 130 sends an instruction to the lower computer electric drive module to stop driving, and when reading back that the driving state of the lower computer electric drive module is stopped, detects whether the water passing enable of the next working condition step is opened; if yes, sends the water temperature value, water flow value and open water passing instruction of the next working condition step to the water cooler, and when reading back that the output water temperature and water flow of the water cooler match the water temperature value and water flow value issued, the water passing enable switching is completed; if no, sends a water blowing instruction to the water cooler, and when reading back that the water cooler is in the water blowing state, waits for the water blowing to be completed according to the set water blowing time and no fault occurs within the waiting time, and the water passing enable switching is completed.

[0151] In one embodiment, the parameter configuration module 110 is further configured to perform an editing operation on the driving working condition step list according to the received editing instruction; the editing operation includes at least one of adding a driving working condition step, deleting a driving working condition step and updating a driving working condition step.

[0152] In one embodiment, the test control module 120 is further configured to, through the lower computer electric drive module, perform fault monitoring according to the protection value set by the current working condition step in the test process, and perform alarm shutdown when a fault is detected.

[0153] The above-mentioned various modules in the power module reactive aging test device can be realized by software, hardware and combinations thereof, wholly or partially. The above-mentioned various modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above-mentioned various modules.

[0154] In one embodiment, a power module reactive aging test system is also provided, including a host computer, an industrial computer and an execution terminal, the execution terminal communicates with the host computer through the industrial computer, and the host computer performs power module reactive aging test according to the above-mentioned method. Figure 2 As shown in the figure, the execution terminal includes: a lower computer electric drive module, responsible for driving control, voltage and current acquisition, and driving fault judgment during aging test, etc.; a lower computer PLC, responsible for test process action control; a water cooler, responsible for water passing and blowing, water flow and water temperature adjustment, and ensuring the constancy of the test environment temperature; a high-voltage power supply, specifically a DC high-voltage power supply, responsible for providing high-voltage input.

[0155] The technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0156] The above-described embodiments are merely illustrative of several embodiments of the present application, which are described in more detail and in a specific manner, but should not be construed as limiting the scope of the patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A method for reactive power aging testing of power modules, characterized in that, include: Based on the current operating condition step parameters in the drive operating condition step list, send the corresponding configuration parameters to the execution terminal, and receive the feedback information sent by the execution terminal after completing the relevant operating condition settings of the power module according to the configuration parameters; After determining that each operating condition setting meets the requirements based on the feedback information, the power module is subjected to corresponding aging tests according to the operating condition type in the current operating condition step parameters. After the power module is tested, the operating condition step parameters of the next step in the drive operating condition step list are obtained, and the configuration parameters of the execution terminal are switched according to the operating condition step parameters of the next step when there are parameter changes. After completing the configuration parameter switching, the operating condition step parameter of the next step is used as the new current operating condition step parameter, and the step of performing the corresponding aging test on the power module according to the operating condition type in the current operating condition step parameter is returned until the corresponding test of all operating condition step parameters in the drive operating condition step list is completed. The execution terminal includes a lower-level electric drive module, a lower-level PLC, a water chiller, and a high-voltage power supply; it sends corresponding configuration parameters to the execution terminal according to the current operating condition step parameters in the drive operating condition step list, and receives feedback information sent by the execution terminal after completing the relevant operating condition settings of the power module according to the configuration parameters, including: When the water supply enable is activated based on the current operating condition parameters, the corresponding water temperature value, water flow rate value, and water supply activation command are sent to the water chiller. When the output water temperature and flow rate fed back from the water chiller are within the set range, the corresponding drive parameters and protection parameters are sent to the lower-level electric drive module. When the drive parameters and protection parameters set by the lower-level electric drive module are completed, a control command is sent to the lower-level PLC to control the lower-level PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and to activate the high-voltage negative relay and the high-voltage pre-charge relay. When the relay status returned by the lower-level PLC is consistent with the issued control command, the current operating condition step voltage value command is sent to the high-voltage power supply. When the output voltage of the high-voltage power supply is consistent with the current operating condition step voltage value command, a control command is sent to the lower-level PLC to control the lower-level PLC to disconnect the high-voltage discharge relay and the high-voltage pre-charge relay, and to activate the high-voltage positive relay and the high-voltage negative relay. When the relay status fed back by the lower-level PLC is consistent with the issued control command, it is determined that the settings of each operating condition meet the requirements.

2. The method according to claim 1, characterized in that, The lower-level electric drive module is responsible for drive control, voltage and current acquisition, and drive fault judgment during aging tests. The lower-level PLC is responsible for controlling the test process actions; The water chiller is responsible for water supply and blowing, and for regulating the water flow and temperature to ensure the constant temperature of the test environment. The high-voltage power supply is responsible for providing high-voltage input.

3. The method according to claim 2, characterized in that, The list of driving condition steps stores multiple sets of operating condition step parameters. Each set of operating condition step parameters is used to set the operating condition of the power module and to perform corresponding aging tests on the power module.

4. The method according to claim 2, characterized in that, The parameter changes include at least one of the following: voltage changes, water flow enable changes, water flow rate changes, water temperature changes, operating condition type changes, and changes in operating condition drive parameters and protection value parameters.

5. The method according to claim 4, characterized in that, Parameter changes include voltage changes; the configuration parameters of the execution terminal are switched according to the operating condition parameters of the next step, including: Send a command to control the lower-level electric drive module to stop driving, and after confirming that the driving status of the lower-level electric drive module has stopped by reading back, analyze whether the voltage value of the next working condition step is greater than or equal to the voltage value of the current working condition step. If the voltage value of the next operating step is greater than or equal to the voltage value of the current operating step, a control command is sent to the lower-level PLC to control the lower-level PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and to activate the high-voltage negative relay and the high-voltage pre-charge relay. If the voltage value of the next operating step is less than the voltage value of the current operating step, a command is sent to the high-voltage power supply to control the high-voltage power supply to stop outputting voltage. When the status of the high-voltage power supply is read back as "stop output voltage operation", a control command is sent to the lower-level PLC, so that the lower-level PLC controls the disconnection of the high-voltage positive relay, the high-voltage negative relay and the high-voltage pre-charge relay, and the activation of the high-voltage discharge relay. When the relay status fed back by the lower-level PLC is consistent with the issued control command, and the high voltage is discharged to the set safe voltage, the step of sending the control command to the lower-level PLC to control the lower-level PLC to disconnect the high voltage positive relay and the high voltage discharge relay, and to activate the high voltage negative relay and the high voltage precharge relay is executed.

6. The method according to claim 5, characterized in that, After sending control commands to the lower-level PLC, controlling the lower-level PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay, and to activate the high-voltage negative relay and the high-voltage pre-charge relay, the process also includes: When the relay status fed back by the lower-level PLC is consistent with the issued control command, the voltage value of the next working condition step is sent to the high-voltage power supply. When the output voltage of the high-voltage power supply matches the voltage value of the next operating step, a control command is sent to the lower-level PLC to make the lower-level PLC disconnect the high-voltage discharge relay and the high-voltage pre-charge relay, and activate the high-voltage positive relay and the high-voltage negative relay. The voltage switching is completed when the relay status fed back from the lower-level PLC matches the issued control command.

7. The method according to claim 4, characterized in that, Parameter changes include changes in water flow rate; the configuration parameters of the execution terminal are switched according to the operating condition parameters of the next step, including: Send a command to the lower-level electric drive module to control the lower-level electric drive module to stop driving; When the drive status of the lower-level electric drive module is read back and found to have stopped, the water flow value for the next operating condition step is sent to the water chiller. The water flow switching is completed when the output water flow rate of the water chiller is read back and matches the water flow rate value of the next operating step.

8. The method according to claim 4, characterized in that, Parameter changes include water temperature changes; the configuration parameters of the execution terminal are switched according to the operating condition parameters of the next step, including: Send a command to the lower-level electric drive module to control the lower-level electric drive module to stop driving; When the drive status of the lower-level electric drive module is read back and found to have stopped, the water temperature value of the next operating condition step is sent to the water chiller. The water temperature switching is completed when the output water temperature of the water chiller is read back and matches the water temperature value of the next operating step.

9. The method according to claim 4, characterized in that, Parameter changes include changes in operating condition type; The configuration parameters of the execution terminal are switched according to the operating condition parameters of the next step, including: When the drive type of the next working condition step is inconsistent with the drive type of the current working condition step, a command is sent to the lower-level electric drive module to control the lower-level electric drive module to stop driving. When the drive status of the lower-level electric drive module is read back and found to have stopped, the drive type instruction for the next working condition step is sent to the lower-level electric drive module. The drive type switching is completed when the drive type of the lower-level electric drive module is read back and found to be consistent with the drive type instruction of the next operating step.

10. The method according to claim 4, characterized in that, Parameter changes include changes in operating condition drive parameters and protection value parameters; the configuration parameters of the execution terminal are switched according to the operating condition step parameters of the next step, including: Send the next operating condition step drive parameters and protection value parameters to the lower-level electric drive module; When the drive parameters and protection values ​​of the lower-level electric drive module are read back and found to be consistent with the drive parameters and protection values ​​of the next operating condition step, the switching of the operating condition drive parameters and protection values ​​is completed.

11. The method according to claim 4, characterized in that, Parameter changes include changes in water flow enable; switching the configuration parameters of the execution terminal according to the operating condition parameters of the next step, including: Send a command to the lower-level electric drive module to stop driving, and when the driving status of the lower-level electric drive module is read back and stopped, check whether the water supply enable is turned on in the next working condition step; If so, the water temperature value, water flow rate value, and water supply start command for the next operating condition step are sent to the water chiller. When the output water temperature and water flow rate of the water chiller are read back and match the sent water temperature and water flow rate values, the water supply enable switching is completed. If not, a water blowing command is sent to the water chiller. When the water chiller is read back to be in the water blowing state, the water blowing is waited for the water blowing to be completed according to the set water blowing time. If no fault occurs within the waiting time, the water supply enable switching is completed.

12. The method according to claim 2, characterized in that, Also includes: During the testing process, the lower-level electric drive module monitors for faults based on the protection values ​​set in the current operating procedure, and alarms and shuts down the machine when a fault is detected.

13. The method according to any one of claims 1 to 12, characterized in that, Also includes: Based on the received editing instructions, the list of drive condition steps is edited; the editing operation includes at least one of adding drive condition steps, deleting drive condition steps, and updating drive condition steps.

14. A power module reactive power aging test device, characterized in that, include: The parameter configuration module is used to send corresponding configuration parameters to the execution terminal according to the current operating condition step parameters in the drive operating condition step list, and to receive feedback information sent by the execution terminal after completing the relevant operating condition settings of the power module according to the configuration parameters. The test control module is used to perform corresponding aging tests on the power module according to the operating condition type in the current operating condition step parameters after determining that each operating condition setting meets the requirements based on the feedback information. The parameter switching module is used to obtain the operating condition step parameters of the next step in the drive operating condition step list after the power module has been tested, and to switch the configuration parameters of the execution terminal according to the operating condition step parameters of the next step when there are parameter changes; after the configuration parameter switching is completed, the operating condition step parameters of the next step are used as the new current operating condition step parameters, so that the test control module performs the corresponding aging test on the power module again according to the operating condition type in the current operating condition step parameters, until the tests corresponding to all operating condition step parameters in the drive operating condition step list are completed. The execution terminal includes a lower-level electric drive module, a lower-level PLC, a water chiller, and a high-voltage power supply. When the parameter configuration module determines to enable water flow based on the current operating condition parameters, it sends the corresponding water temperature value, water flow rate value, and water flow start command to the water chiller. When the output water temperature and flow rate from the water chiller are within the set range, it sends the corresponding drive parameters and protection parameters to the lower-level electric drive module. When the drive parameters and protection parameters of the lower-level electric drive module are set, it sends a control command to the lower-level PLC, controlling the PLC to disconnect the high-voltage positive relay and the high-voltage discharge relay. Release the high-voltage discharge relay and activate the high-voltage negative relay and high-voltage pre-charge relay; when the relay status returned by the lower-level PLC matches the issued control command, send the current operating condition step voltage value command to the high-voltage power supply; when the output voltage of the high-voltage power supply matches the current operating condition step voltage value command, send a control command to the lower-level PLC to control the lower-level PLC to disconnect the high-voltage discharge relay and high-voltage pre-charge relay, and activate the high-voltage positive relay and high-voltage negative relay; when the relay status fed back by the lower-level PLC matches the issued control command, confirm that each operating condition setting meets the requirements.

15. A power module reactive power aging test system, characterized in that, The system includes a host computer, an industrial control computer, and an execution terminal. The execution terminal communicates with the host computer through the industrial control computer. The host computer performs reactive power aging tests on the power module according to any one of claims 1 to 13.

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