Subway train air conditioner emergency inverter tester

Abstract

The invention provides a subway train air conditioner emergency inverter tester. The subway train air conditioner emergency inverter tester comprises a basic tester and a load simulator. The load simulator is connected with the basic tester, and the load simulator is used for simulating the operation condition of the ventilation unit. The basic tester is externally connected with a power supply and comprises a switching power supply module, an analog quantity input module, a transmitter module, a man-machine interaction module, a measurement interface module and a data transmission interface module. According to the subway train air conditioner emergency inverter tester, an integrated design is adopted, the direct test requirement under the condition that the air conditioner inverter is not disassembled is met, the field operability is high, maintenance workers are helped to reduce the work intensity of inspection items, and the efficiency and the maintenance qualification rate of the emergency inverter are improved.

Description

Technical Field

[0001] The present invention relates to the field of rail vehicle detection, and particularly to a subway train air conditioner emergency inverter tester. Background Art

[0002] Shanghai Metro Type 08C02&03 trains are composed of 7 carriages, with 14 air conditioners and 7 air conditioner inverters. When the train is running, the air conditioners are not only used to adjust the temperature of the carriages, but also ensure that sufficient fresh air enters the train carriages. The train carriages are a relatively enclosed space. To prevent passengers from suffering from oxygen deficiency in the enclosed space for a long time and to ensure the safety of passengers' lives, the air conditioner ventilation units can introduce fresh air and discharge indoor air to ensure indoor air circulation and comfort. As Figure 10 shown, Shanghai Metro Type 08C02&03 trains are composed of 7 carriages, with 14 air conditioners and 7 air conditioner inverters. Under normal conditions, the air conditioner ventilation units on the train are powered by the train auxiliary inverter, which provides a three-phase AC380V, 50HZ AC power supply to ensure normal operation.

[0003] However, when the train auxiliary inverter fails and stops working, the air conditioner ventilation units lose power, which means that the train will not be able to provide fresh air, undoubtedly posing a threat to the safety of passengers' lives. At this time, the battery DC110V power supply will play an emergency role. It generates a three-phase AC220V, 35HZ AC power supply through the emergency inverter to re-power the air conditioner ventilation units to ensure their continued operation. One emergency inverter can provide power for four ventilation fans in two air conditioners to ensure sufficient fresh air supply in the train carriages. Therefore, the emergency inverter is used to ensure the most basic ventilation requirements and is the last line of defense for the safety of passengers' lives.

[0004] Since the emergency inverter does not operate under normal conditions, the usual inspection can only observe whether the air conditioner emergency inverter can start by simulating the situation where the auxiliary inverter stops working. However, this method cannot detect whether there are potential fault hazards inside the emergency inverter. Once the air conditioner emergency inverter fails, it needs to be removed and sent to the manufacturer for repair, which takes at least two weeks. And there is no load test after repair to ensure its performance, which may lead to repeated failures and thus cannot guarantee its quality. This situation poses a potential hidden danger to the safe operation of the train.

[0005] Currently, for the repair of emergency inverters, the cost of outsourcing the repair is too high and the repair period is relatively long. To reduce the maintenance cost and shorten the entire repair period, it is particularly important to design an inverter tester. Summary of the Invention

[0006] The object of the present invention is to provide a subway train air conditioner emergency inverter tester, which can not only save costs, but also greatly improve the maintenance efficiency, shorten the entire maintenance period, ensure the normal operation of the emergency inverter, and provide a strong guarantee for the safe operation of the train.

[0007] To achieve the above object, the present invention provides a subway train air conditioner emergency inverter tester, including: a basic tester and a load simulator;

[0008] The load simulator is connected to the basic tester, and the load simulator is used to simulate the operating conditions of the ventilation unit;

[0009] The basic tester is externally connected to a power supply, and the basic tester includes:

[0010] A switching power supply module, the switching power supply module is respectively connected to the power supply and the emergency inverter to be tested, and the switching power supply module controls the on-off between the power supply and the basic tester or the emergency inverter to be tested or the load simulator;

[0011] An analog input module, the analog input module is respectively connected to the power supply, the emergency inverter to be tested and the switching power supply module, the analog input module receives the signals output by the power supply, the emergency inverter to be tested and the switching power supply module, processes the received signals into analog signals and outputs them;

[0012] A transmitter module, the transmitter module is arranged between the analog input module and the power supply, the emergency inverter to be tested, and the switching power supply module, and the transmitter module converts the signals output by the power supply, the emergency inverter to be tested and the switching power supply module into standard signals and transmits the standard signals to the analog input module;

[0013] A human-machine interaction module, the human-machine interaction module is connected to the emergency inverter to be tested and the analog input module, the human-machine interaction module issues instructions to control the emergency inverter to be tested, the human-machine interaction module receives the analog signals output by the analog input module and processes them to obtain test data and / or test results, and the human-machine interaction module displays the obtained test data and / or test results;

[0014] A measurement interface module, the measurement interface module is connected to the human-machine interaction module, and the measurement interface module is used to directly measure one or more parameters of the emergency inverter to be tested and transmit them to the human-machine interaction module, and one or more parameters of the emergency inverter to be tested are test data;

[0015] A data transmission interface module, the data transmission interface module is connected to the human-machine interaction module, the data transmission interface module is externally connected to a storage device, and the test data is exported to the storage device through the human-machine interaction module.

[0016] In one embodiment, the load simulator includes a driving module and a magnetoresistor. The driving module drives the magnetoresistor, and the resistance of the magnetoresistor is adjustable. The magnetoresistor is used to simulate the operating conditions of a ventilation unit.

[0017] In one embodiment, the human-machine interaction module includes a human-machine interface and a programmable logic controller. The programmable logic controller receives instructions issued by the human-machine interface to control the emergency inverter under test. The programmable logic controller is connected to the analog input module. The analog signals of the analog input module are converted into digital signals by an A / D converter and then sent to the programmable logic controller. The programmable logic controller receives the digital signals and processes them to obtain test data and outputs the test data to the human-machine interface, and the human-machine interface displays the test data.

[0018] In one embodiment, a button unit is provided on the human-machine interface. The button unit includes:

[0019] A main screen button. After the main screen button is pressed, the main screen is displayed. The main screen includes an inverter power-on button, a three-phase motor loading button, and an inverter start button. When the inverter power-on button is pressed, power is supplied to the emergency inverter under test. When the inverter button is pressed, the KM1 contactor closes to start the emergency inverter under test or the KM1 contactor opens to stop the emergency inverter under test. When the three-phase motor loading button is pressed, the KM2 contactor closes to start or the KM2 contactor opens to stop the driving module in the load simulator. A timing button for the emergency inverter under test is provided on the touch screen. The timing button for the emergency inverter under test is used to set the operating time of the emergency inverter under test. After the operating time ends, the emergency inverter under test automatically stops. One or more types of test data are displayed on the human-machine interface. The test data includes the real-time values of voltage, current, and frequency.

[0020] A resistance and capacitance detection button. When the resistance and capacitance detection button is pressed, the resistance and capacitance inside the emergency inverter under test are measured. One or more types of test data are displayed on the human-machine interface. The test data includes resistance values and capacitance values.

[0021] An export button. When the export button is pressed, one or more types of test data are exported. The test data includes the real-time values of voltage, current, and frequency, resistance values, and capacitance values.

[0022] A test report button. When the test report button is pressed, a test report is generated and displayed. The test report includes test data and / or test results. The test results are qualified or unqualified.

[0023] In one embodiment, the human-machine interface further includes a fault setting button. Pressing the fault setting button enters a fault setting interface, which is used to indicate the faults of the emergency inverter under test.

[0024] In one embodiment, an emergency button module is provided on the basic tester. The emergency button module includes a DC voltage loading button and a load loading button. Pressing the DC voltage loading button powers the emergency inverter under test, and pressing the load loading button closes the KM2 contactor to start or opens the KM2 contactor to stop the drive module in the load simulator.

[0025] In one embodiment, there is at least one analog quantity expansion module on the programmable logic controller, and the analog quantity expansion module is used to increase the input channels of signals.

[0026] In one embodiment, the basic tester further includes a reluctance torque regulator. The reluctance torque regulator is connected to the switching power supply module and is connected to the reluctance on the load simulator to adjust the resistance of the reluctance.

[0027] In one embodiment, the switching power supply module includes a first switching power supply module and a second power supply module. After the switching power supply module is connected to the power supply, the power supply is respectively sent to the first switching power supply module and the second switching power supply module;

[0028] Among them, the first switching power supply module powers the emergency inverter under test or the load simulator;

[0029] The second switching power supply module powers the basic tester.

[0030] In one embodiment, the first switching power supply module is an AC220V / DC80 - 135V adjustable switching power supply module, and the second power supply module is an AC220V / DC24V switching power supply module. The power supply is an AC220V power supply. After the switching power supply module is connected to the AC220V power supply, the AC220V power supply is respectively sent to the AC220V / DC80 - 135V adjustable switching power supply module and the AC220V / DC24V switching power supply module;

[0031] Among them, the AC220V / DC80 - 135V adjustable switching power supply module outputs an adjustable DC voltage of 80 - 135V to power the emergency inverter under test or the load simulator;

[0032] The AC220V / DC24V switching power supply module outputs a DC 24V power supply to power each module on the basic tester.

[0033] The subway train air-conditioning emergency inverter tester of the present invention has the following beneficial effects:

[0034] 1. The present invention adopts an integrated design, with a quick interface and simple operation steps, suitable for the use of inverters of different vehicle models. The present invention meets the direct test requirements of the air-conditioning emergency inverter without disassembly, and has strong on-site operability. The load simulator in the present invention can simulate the pre-test of repaired spare parts with load, ensuring the reliability of the spare parts when installed on the vehicle, and enhancing the practicability and reliability of the present invention.

[0035] 2. By applying the present invention in the repair process of the emergency inverter, the high cost of outsourcing repair or replacing new parts can be reduced to the price of replacing a single component. At the same time, due to the convenience of self-replacement, the original two-week time is reduced to two days, shortening the entire repair cycle, improving the availability of the train, and further ensuring the on-line rate of the train.

[0036] 3. Thanks to the fact that the basic tester can automatically generate data charts according to the current performance of the inverter, if applied to daily maintenance, it can eliminate the potential safety hazards caused by inverter failures to a certain extent, prevent the occurrence of repeated failures, ensure the quality of the inverter, and guarantee the safe operation of the main-line train. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Schematic diagram of the control principle of the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention.

[0038] Figure 2 Schematic diagram of the panel of the basic tester in the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention.

[0039] Figure 3 Schematic diagram of the internal component distribution of the basic tester in the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention.

[0040] Figure 4 Schematic diagram of the load simulator in the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention.

[0041] Figure 5 Schematic diagram of the corresponding curve of current and torque.

[0042] Figure 6 Schematic diagram of the wiring of the measured emergency inverter in the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention.

[0043] Figure 7 Schematic diagram of the main power circuit of the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention.

[0044] Figure 8Schematic diagram of the wiring of the analog expansion module in an embodiment of the present invention.

[0045] Figure 9 Control circuit diagram of contactors KM1 and KM2 in an embodiment of the present invention.

[0046] Figure 10 Schematic diagram of the operation of the emergency inverter of Shanghai Metro Line 08C02&03 trains. Detailed implementation manners

[0047] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention and are not used to limit the invention.

[0048] The present invention provides a tester for the emergency inverter of subway train air conditioners. In order to take into account both the functions of the emergency inverter tester and the mobility, the entire emergency inverter tester is of a split design, including a basic tester and a load simulator. The basic tester and the load simulator can be used separately or together. The basic tester can directly go to the production site to be used alone for testing the air conditioner emergency inverter, while the load simulator is relatively heavy and is generally placed in the maintenance room. Before the emergency inverter is installed on the vehicle (or when the emergency inverter to be tested is removed from the vehicle for maintenance), the load simulator is connected to the basic tester to simulate the operating conditions of the ventilation unit.

[0049] The present invention provides a tester for the emergency inverter of subway train air conditioners, including: a basic tester and a load simulator. The load simulator is connected to the basic tester, and the load simulator is used to simulate the operating conditions of the ventilation unit. Further, the load simulator includes: a drive module and a magnetic resistor. The drive module drives the magnetic resistor, and the resistance of the magnetic resistor is adjustable. The magnetic resistor is used to simulate the operating conditions of the ventilation unit. In one embodiment, the drive module includes a motor. Refer to Figure 4 . In this embodiment, preferably, the load simulator includes a 1.5KW four-pole three-phase motor and a TJ-POD-2.5 magnetic resistor to meet the requirements of real load simulation. The 1.5KW four-pole three-phase motor drives the TJ-POD-2.5 magnetic resistor, and the resistance of the TJ-POD-2.5 magnetic resistor can be adjusted. The current-torque corresponding curve is as shown in Figure 5 . The TJ-POD-2.5 magnetic resistor is mainly used to simulate the operating conditions of the ventilation unit on the train.

[0050] The basic tester is externally connected to a power supply. The basic tester includes: a switching power supply module, an analog input module, a transmitter module, a human-machine interaction module, a measurement interface module, and a data transmission interface module.

[0051] The switching power supply module is respectively connected to the power supply and the emergency inverter under test. The switching power supply module controls the on / off between the power supply and the basic tester, or the emergency inverter under test, or the load simulator.

[0052] The analog input module is respectively connected to the power supply, the emergency inverter under test and the switching power supply module. The analog input module is used to receive the signals output by the power supply, the emergency inverter under test and the switching power supply module. The analog input module processes the received signals into analog signals and outputs them.

[0053] The transmitter module is arranged between the analog input module and the power supply, the emergency inverter under test, and the switching power supply module. The transmitter module converts the signals output by the power supply, the emergency inverter under test, and the switching power supply module into standard signals and transmits the standard signals to the analog input module. Further, the transmitter module includes one or more AC voltage transmitters, one or more AC current transmitters, DC current transmitters, DC voltage transmitters, resistance measurement transmitters, and AC frequency transmitters. In a specific embodiment, the transmitter module includes: a DC voltage transmitter for the switching power supply module, a DC current transmitter for the switching power supply module, an input AC 220V voltage transmitter, an output AC voltage transmitter for the emergency inverter, an output AC current transmitter for the emergency inverter, an AC frequency current transmitter for the emergency inverter, and a resistance measurement transmitter. Among them, the DC voltage transmitter for the switching power supply module and the DC current transmitter for the switching power supply module are arranged between the analog input module and the switching power supply module. The DC voltage transmitter for the switching power supply module and the DC current transmitter for the switching power supply module convert the output voltage and output current of the switching power supply module into standard signals and transmit the standard signals to the analog input module. The input AC 220V voltage transmitter is arranged between the analog input module and the power supply. The input AC 220V voltage transmitter converts the input voltage of the power supply into a standard signal and transmits the standard signal to the analog input module. The output AC voltage transmitter for the emergency inverter, the output AC current transmitter for the emergency inverter, and the AC frequency current transmitter for the emergency inverter are arranged between the analog input module and the emergency inverter under test. The output AC voltage transmitter for the emergency inverter, the output AC current transmitter for the emergency inverter, and the AC frequency current transmitter for the emergency inverter convert the voltage, current, and frequency of the emergency inverter under test into standard signals and transmit the standard signals to the analog input module. The resistance measurement transmitter can directly measure the resistance value inside the emergency inverter, which is equivalent to a multimeter. When repairing the emergency inverter, there is no need for an external multimeter, which is more convenient.

[0054] Among them, the signals output by the power supply, the emergency inverter under test, and the switching power supply module include: the voltage, current, and frequency of the emergency inverter under test, as well as the input voltage of the power supply, the output voltage, and output current of the switching power supply module.

[0055] The human-machine interaction module is connected to the emergency inverter under test and the analog input module. The human-machine interaction module issues instructions to control the emergency inverter under test. The human-machine interaction module receives the analog signals output by the analog input module and processes them to obtain test data, and the human-machine interaction module displays the obtained test data. In a specific embodiment, the human-machine interaction module includes a human-machine interface and a programmable logic controller. The programmable logic controller is the operation and control core of the basic tester. The programmable logic controller receives the instructions from the human-machine interface to control the emergency inverter under test. The programmable logic controller is connected to the analog input module. The analog signals output by the analog input module are converted into digital signals by an A / D converter and then sent to the programmable logic controller. The programmable logic controller receives the digital signals and processes them to obtain test data and / or test results and outputs them to the human-machine interface, and the human-machine interface displays the test data and / or test results. The test data here includes: the voltage value, current value, frequency value of the emergency inverter under test, as well as the input voltage value of the power supply, the output voltage value and output current value of the switching power supply module. Further, the human-machine interface is a touch screen. In this embodiment, preferably, the touch screen selects the XINJE TGA63-UT touch screen, which can better perform human-machine interaction. The programmable logic controller selects the XINJE XD3-16R-C programmer, which can expand up to 10 XD series digital and analog modules at most, and can obtain a higher data processing speed.

[0056] The measurement interface module is connected to the human-machine interaction module. The measurement interface module is used to directly measure one or more parameters of the emergency inverter under test and transfer them to the human-machine interaction module. One or more parameters of the emergency inverter under test are the test data, which can also be displayed on the human-machine interface. In a specific embodiment, the measurement interface module includes multiple probes. Various test instruments are externally connected through the probes, such as a capacitance meter, an inductance meter, etc. Specifically, the measurement interface module includes a resistance measurement probe + connection port, a resistance measurement probe - connection port, a capacitance measurement probe + connection port, and a capacitance measurement probe - connection port, which can directly measure the basic conditions of components such as resistors, capacitors, and transformers in the emergency inverter and record them. The measurement interface module also includes a capacitance meter, and the capacitance measurement probe is connected to the corresponding jack of the capacitance meter for corresponding measurements. Maintenance personnel can perform on-site troubleshooting and repair according to the detected component information and evaluation report. No other instruments are required for measurement, and the detection is convenient.

[0057] The data transmission interface module is connected to the human-machine interaction module. The data transmission interface module is externally connected to a storage device, and the test data is exported to the storage device through the human-machine interaction module. Specifically, the data transmission interface module includes a USB interface or an Ethernet interface, etc.

[0058] In a specific embodiment, the basic tester includes a box, and the various modules described above are installed and connected inside the box. For the distribution of internal components of the basic tester box, refer to Figure 3 .

[0059] As Figure 1 shown, the PLC (Programmable Logic Controller) is the operation and control core of the basic tester, and the touch screen serves as the human-machine interface. The input voltage of the power supply is AC 220V. The AC 220V voltage is supplied to the emergency inverter under test through the switching power supply module. The PLC controls the operation of the emergency inverter under test. The three-phase AC voltage, current, and frequency generated by the emergency inverter under test, as well as the input AC 220V voltage and the voltage output by the switching power supply module, are input to the analog input module through the converter module, converted by the A / D converter, input to the PLC, and compared with the standard data of the inverter through the program operation of the PLC. The generated test results can be displayed on the touch screen.

[0060] Furthermore, a button unit is provided on the human-machine interface. The button unit includes: a main screen button, a resistor-capacitor detection button, an export button, and a test report button, where:

[0061] After the main screen button is pressed, the main screen is displayed. The main screen includes an inverter power-on button, a three-phase motor loading button, and a start inverter button. When the inverter power-on button is pressed, power is supplied to the emergency inverter under test. When the inverter button is pressed, the KM1 contactor closes to start the emergency inverter under test or the KM1 contactor opens to stop the emergency inverter under test. When the three-phase motor loading button is pressed, the KM2 contactor closes to start or the KM2 contactor opens to stop the drive module in the load simulator. The circuit diagram is as Figure 9 shown. KA1 is the inverter button. When KA1 closes, the KM1 contactor closes to start the emergency inverter under test. When KA1 opens, the emergency inverter under test stops. KA2 is the three-phase motor loading button. When KA2 closes, the KM2 contactor closes to start the start module in the load simulator. When KA2 opens, the drive module in the load simulator stops. A timing button for the emergency inverter under test is provided on the touch screen. The timing button for the emergency inverter under test is used to set the running time of the emergency inverter under test. After the running time ends, the emergency inverter under test automatically stops. One or more test data are displayed on the human-machine interface. Here, the test data includes the real-time values of voltage, current, and frequency.

[0062] When the resistor-capacitor detection button is pressed, the resistors and capacitors inside the emergency inverter under test are measured. One or more test data are displayed on the human-machine interface. Here, the test data includes the resistance value and the capacitance value. In one embodiment, a measuring device is externally connected through the measuring interface module, and then the resistor-capacitor detection button is pressed to measure the resistors and capacitors inside the emergency inverter under test.

[0063] The export button is pressed to export one or more types of test data, where the test data includes the real-time values of voltage, current, and frequency, resistance value, and capacitance value.

[0064] The test report button is pressed to generate and display a test report, and the test report includes test data and / or test results, and the test results are qualified or unqualified.

[0065] In a specific embodiment, a button unit is provided on the human-machine interface, and operating the button unit can trigger the corresponding display interface. The button unit includes a main screen button, a resistance-capacitance detection button, an export button, and a test report button. Specifically as follows:

[0066] (1) Main screen button:

[0067] (a) After pressing the main screen button, enter the first display interface, from which the real-time values of bus voltage (AC input voltage), (DC) input voltage, (DC) input current, (three-phase AC) output frequency, (three-phase AC) output voltage, and (three-phase AC) output current can be directly observed;

[0068] From the first display interface, the input and output voltages of the AC220V / DC24V switching power supply and the output current value of the reluctance torque regulator can be directly observed;

[0069] From the first display interface, the operating states of the DC KM1 contactor and KM2 contactor can be directly observed;

[0070] The first display interface includes an inverter start button, and pressing this inverter start button can start or stop the emergency inverter.

[0071] (b) Press the blank area within the main screen to enter the second display interface. From the second display interface, a curve graph of the real-time numerical values of bus voltage (AC input voltage), (DC) input voltage, (DC) input current, (three-phase AC) output frequency, (three-phase AC) output voltage, and (three-phase AC) output current can be directly observed. Preferably, the recorded number of running times is saved as 20 times, with cyclic coverage. The running time can be set, and there are 2 setting methods: 1. The running time can be set, and the setting range of the running time is 0 - 199 seconds. When the set running time arrives, the emergency inverter automatically stops. 2. If the emergency inverter runs for a long time (a long time means exceeding the set range of the running time), then the start inverter button needs to be pressed again to stop the emergency inverter.

[0072] The second display interface includes an inverter power-on button, a three-phase motor loading button, and an inverter start button. Pressing the inverter power-on button energizes the emergency inverter. Pressing the three-phase motor loading button starts the motor in the load simulator. Pressing the inverter start button starts or shuts down the emergency inverter under test. Press the emergency inverter power-on button (KM1 closes) and the three-phase motor loading button (KM2 closes) on the main touch screen.

[0073] (2) Resistance and Capacitance Detection Button:

[0074] Press the resistance and capacitance detection button to enter the third display interface.

[0075] Pressing the resistance and capacitance detection button detects the resistance and capacitance inside the emergency inverter. The third display interface shows the measured values of the resistance and capacitance inside the emergency inverter, presented in the form of a chart or curve.

[0076] Pressing the resistance and capacitance detection button can measure and save the resistance and capacitance values inside the emergency inverter during maintenance, facilitating data tracking in the future. Preferably, up to 2000 sets of resistance and capacitance measurement values can be recorded. Among them, the unit of resistance is kiloohm and the unit of capacitance is microfarad.

[0077] (3) Export Button:

[0078] Press the export button to enter the fourth display interface.

[0079] Pressing the export button exports various detection values and resistance and capacitance detection values. After pressing the export button, an external storage device is connected through the data transmission interface module to export various detection values and records of resistance and capacitance measurement values. In one embodiment, the data transmission interface module is a USB interface, and a USB flash drive is used to export various detection values and records of resistance and capacitance measurement values. The real-time values of bus voltage (AC input voltage), (DC) input voltage, (DC) input current, (three-phase AC) output frequency, (three-phase AC) output voltage, and (three-phase AC) output current can be exported in two forms: chart and curve. The record of resistance and capacitance measurement values is in chart form and can be downloaded to a computer using a USB flash drive for viewing and saving.

[0080] Operation method: Plug in the USB flash drive, press the data acquisition button, select the data range, then press the data export button. Wait until the data export button changes color, indicating that the data download is complete, and then unplug the USB flash drive.

[0081] The fourth display interface includes a data acquisition button and a data export button.

[0082] (4) Test Report Button:

[0083] Press the test report button to enter the fifth display interface.

[0084] After the test report button is pressed, the fifth display interface is entered.

[0085] The test report button is pressed to generate and display a test report. On the fifth display interface, the form and time period of the data to be saved can be selected, the correctness of the recorded resistance and capacitance measurement values can be checked, and a judgment can be made on the test results generated by the emergency inverter. The test results are of two types: qualified and unqualified.

[0086] Furthermore, the human-machine interface also includes a fault setting button. Press the fault setting button to enter the fault setting interface, which is used to indicate the faults of the emergency inverter under test. Various numerical values and detection times within the range of faults generated by the emergency inverter can be input into the fault setting interface. Then, run the emergency inverter under test, collect relevant data such as detection values and detection times, compare them with the input values, and preliminarily judge the range of faults generated by the emergency inverter. The human-machine interface (such as a touch screen) will automatically pop up the fault code and the relevant components and ranges where the faults occur. This facilitates finding the fault points of the emergency inverter for replacement and improves the maintenance efficiency. If the touch screen does not automatically pop up the fault code, it means that the emergency inverter under test is normal.

[0087] Furthermore, an emergency button module is provided on the basic tester. The emergency button module includes a DC voltage loading button and a load loading button, which have the same functions as the inverter power-on button and the three-phase motor loading button in the second display interface described above. See Figure 2 When the DC voltage loading button is pressed, power is supplied to the emergency inverter under test. When the load loading button is pressed, the KM2 contactor closes to start or the KM2 contactor opens to stop the drive module in the load simulator. The settings of the DC voltage loading button and the load loading button are to ensure that when the touch screen fails, the emergency inverter test can be stopped urgently to ensure the safety of the detection.

[0088] Furthermore, the basic tester also includes a reluctance torque regulator, which is connected to the switching power supply module. The reluctance torque regulator is connected to the reluctance on the load simulator to adjust the resistance of the reluctance.

[0089] Furthermore, there is at least one analog quantity expansion module on the programmable logic controller. The analog quantity expansion module is connected to the programmable logic controller and is used to increase the input channels of signals. In a specific embodiment, there are two analog quantity expansion modules in the programmable logic controller. In this embodiment, preferably, the two analog quantity expansion modules are the Xinje XD-E8AD analog quantity expansion module and the Xinje XD-E4AD analog quantity expansion module. See Figure 7 and Figure 8 .

[0090] Further, the switching power supply module includes a first switching power supply module and a second power supply module. After the switching power supply module is connected to the power supply, the power supply is sent to the first switching power supply module and the second switching power supply module respectively. Among them, the first switching power supply module supplies power to the emergency inverter under test or the load simulator, and the second switching power supply module supplies power to each module on the basic tester. In a specific embodiment, the switching power supply module includes an AC220V / DC80 - 135V adjustable switching power supply module and an AC220V / DC24V switching power supply module, and the power supply is an AC220V power supply. After the switching power supply module is connected to the AC220V power supply, the AC220V power supply is sent to the AC220V / DC80 - 135V adjustable switching power supply module and the AC220V / DC24V switching power supply module respectively. Among them, the AC220V / DC80 - 135V adjustable switching power supply module outputs an adjustable DC voltage of 80 - 135V to supply power to the emergency inverter under test and the load simulator. The AC220V / DC24V switching power supply module outputs a DC voltage of 24V to supply power to each module on the basic tester.

[0091] In a specific embodiment, the AC220V / DC24V switching power supply module outputs DC24V, which is respectively supplied to the XINJE TGA63-UT touch screen, the XINJE XD3-16R-C PLC programmable controller, the XINJE XD-E8AD analog quantity expansion module, the XINJE XD-E4AD analog quantity expansion module, the input AC220V voltage transmitter, the DC voltage transmitter output by the switching power supply module, the DC current transmitter of the switching power supply module, the AC voltage transmitter output by the emergency inverter, the AC current transmitter output by the emergency inverter, the AC frequency current transmitter of the emergency inverter, the resistance measurement transmitter, the external measuring instruments (such as inductance meter, capacitance meter), and the magnetoresistive torque regulator as the working power supply. The AC220V / DC80-135V adjustable switching power supply module outputs an adjustable voltage DC80-135V power supply, which enters the measured emergency inverter through the normally open contacts of the DC KM1 contactor, XP1A, and XP1B. The emergency inverter internally converts the DC power supply into a three-phase AC220V, 35HZ AC power supply, which is sent to the basic tester through XP2A and XP2B, and then enters the three-phase AC motor of the load module through the normally open contacts of the KM2 contactor and XP3A and XP3B in the basic tester. The input AC220V voltage transmitter, the DC voltage transmitter output by the adjustable switching power supply module, the DC current transmitter of the adjustable switching power supply module, the AC voltage transmitter output by the emergency inverter, the AC voltage transmitter output by the emergency inverter, and the AC frequency current transmitter of the emergency inverter on this circuit can convert the relevant detected data through the XD-E8AD analog quantity expansion module and XD-E4AD analog quantity expansion module of the PLC programmable controller, and display the detection results of the input AC220V voltage, current, frequency, the DC voltage and current output by the adjustable switching power supply module, and the three-phase AC voltage, current, and frequency output by the emergency inverter on the touch screen.

[0092] Further, as Figure 2 shown, a DC voltage adjustment knob is also provided on the basic tester. The DC voltage adjustment knob is connected to the AC220V / DC80-1-35V adjustable switching power supply module to adjust the magnitude of the output DC voltage, and the adjustment range is 80-135V.

[0093] Further, as Figure 2 shown, the basic tester further includes a main power switch button. The main power switch button is connected to the switching power supply module, and the main power switch button controls the on-off between the power supply and the switching power supply module.

[0094] Further, the basic tester further includes a fault indicator light group, and the fault indicator light group is used to indicate whether a fault occurs in the test loop. See Figure 2. In a specific embodiment, the fault indicator light group includes: a power supply overvoltage indicator light and a power supply overcurrent indicator light for indicating faults of the power supply; a load overvoltage indicator light and a load overvoltage indicator light for indicating faults of the load simulator; and a warning indicator light for indicating whether there is a fault in the emergency inverter under test.

[0095] In a specific embodiment, as Figures 6-9 shown, the wiring steps between the basic tester, the emergency inverter under test, and the load simulator are as follows:

[0096] 1. Connect the basic tester to the emergency inverter under test with wires. XP1A, XP1B, XP2A, and XP2B are the two connectors of the two connecting wires between the basic tester and the emergency inverter under test. 1 and 2 of XP1A and XP1B are the DC inputs of the emergency inverter under test. 3 of XP1A is the start control of the emergency inverter (the normally open contact of KA3 is closed, and the inverter starts). 4 and 5 of XP1A are the warning indicator lights. 1, 2, and 3 of XP2A are the three-phase AC outputs of the emergency inverter under test.

[0097] 2. Connect the basic tester to the load simulator with wires. XP3A, XP3B, XP4A, and XP4B are the two connectors of the two connecting wires between the basic tester and the load simulator. 1, 2, and 3 of XP3A are the three-phase AC inputs of the motor in the load simulator. 1 and 2 of XP4A are used to adjust the resistance of the magnetoresistor through the magnetoresistance adjustment knob, and the magnetoresistance adjustment knob is on the inner panel of the basic tester box. 3 and 4 of XP4A supply power to the capacitance meter.

[0098] 3. Connect the basic tester to the AC220V power supply line.

[0099] The working principle of the subway train air-conditioning emergency inverter tester according to an embodiment of the present invention is as follows:

[0100] 1. As Figure 7 shown, turn on the AC220V power supply and press the power switch. The AC220V power supply is respectively sent to the AC220V / DC80 - 135V adjustable switch power supply module and the AC220V / DC24V switch power supply module.

[0101] 2. As Figure 7 and Figure 8As shown, the AC220V / DC24V switching power supply module outputs DC24V, which is respectively supplied to the XINJE TGA63-UT touch screen, the XINJE XD3-16R-C PLC programmable controller, the XINJE XD-E8AD analog expansion module, the XINJE XD-E4AD analog expansion module, the input AC220V voltage transmitter, the adjustable switching power supply module output DC voltage transmitter, the adjustable switching power supply module DC current transmitter, the emergency inverter output AC voltage transmitter, the emergency inverter output AC current transmitter, the emergency inverter AC frequency current transmitter, the resistance measurement transmitter, the external measuring instrument, and the magnetoresistive regulator as the working power supply.

[0102] 3. The AC220V / DC80 - 135V adjustable switching power supply module outputs an adjustable voltage DC80 - 135V power supply, which enters the measured emergency inverter through the normally open contacts of the DC KM1 contactor, XP1A, and XP1B. The internal emergency inverter converts the DC power supply into a three-phase AC220V, 35HZ AC power supply, which is sent to the basic tester through XP2A and XP2B, and then enters the three-phase AC motor of the load module through the normally open contacts of the KM2 contactor in the basic tester, XP3A, and XP3B.

[0103] The input AC220V voltage transmitter, the adjustable switching power supply module output DC voltage transmitter, the adjustable switching power supply module DC current transmitter, the emergency inverter output AC voltage transmitter, the emergency inverter output AC voltage transmitter, and the emergency inverter AC frequency current transmitter on this circuit can perform analog-to-digital conversion of relevant test data through the XD-E8AD analog expansion module and XD-E4AD analog expansion module of the PLC programmable controller, and display the detection results of the input AC220V voltage, current, frequency, adjustable switching power supply module output DC voltage, current, three-phase AC voltage, current, frequency, etc. output by the emergency inverter on the touch screen.

[0104] The test steps of the subway train air conditioner emergency inverter tester according to an embodiment of the present invention for the emergency inverter are as follows:

[0105] 1. Connect the basic tester, the measured emergency inverter, and the load simulator with wires. After confirming that it is correct, turn on the power supply and turn on the main power switch button.

[0106] 2. Enter the human-machine interface, press the inverter power-on button (KM1 closes) and the load three-phase motor button (KM2 closes) on the main screen of the human-machine interface, and then press the start inverter button. The inverter starts to work. The detection results of the input AC220V voltage, current, frequency, adjustable switching power supply module output DC voltage, current, three-phase AC voltage, current, frequency, etc. output by the inverter are displayed on the human-machine interface and recorded in real time, with tables and curves recorded.Figure 2 The recorded data is compared with the pre-set data to judge the operating condition of the automatic emergency inverter and an inspection report is automatically generated.

[0107] If there is a fault, the fault code will be popped up and the general location for inspection will be reminded. The detailed information of the fault codes is shown in Table 1 below.

[0108] Table 1 Detailed Information of Fault Codes

[0109]

[0110] All components in the relevant position column in Table 1 above are internal components of the inverter.

[0111] The DC voltage loading button, load loading button set on the inner panel of the basic tester box have the same functions as the inverter power-on button and the three-phase motor loading button in the main screen of the human-machine interface.

[0112] 3. The measurement interface module of the basic tester is equipped with probes, which can directly measure the basic conditions of components such as resistors, capacitors, and transformers in the emergency inverter and record them. Maintenance personnel can perform on-site troubleshooting and repair according to the component information and evaluation report obtained from the detection. No other instruments are required for measurement, and the detection is convenient.

[0113] 4. When the load simulator simulates the operating conditions of the air conditioner, for problems that cannot be solved on-site, it can be removed and repaired in the maintenance workshop. It can cooperate. After the repair is completed, the input and output current, voltage, frequency, etc. can be detected and an overall evaluation can be carried out on it.

[0114] 5. After the basic tester completes the test, the test results can be output to a USB flash drive through the data transmission interface module for archiving and sorting for further research later. The data is recorded with the voltage, current, and load values in units of time (in the form of tables and waveform diagrams) until the target value. If there is no intervention, until an error shutdown occurs, the basic tester will record the time from startup to shutdown and all the intermediate processes (that is, voltage, current, load, etc.).

[0115] The subway train air conditioner emergency inverter tester of the present invention has the following beneficial effects:

[0116] 1. The present invention adopts an integrated design, quick interfaces, and simple operation steps, and is suitable for the use of inverters of different vehicle types. The present invention meets the direct test requirements of the air conditioner emergency inverter without disassembly, and has strong on-site operability. The load simulator in the present invention can simulate pre-testing of repaired spare parts with load, ensuring the reliability of the spare parts when installed on the vehicle, and enhancing the practicability and reliability of the present invention.

[0117] 2. By applying the present invention in the maintenance process of the emergency inverter, the high cost of outsourcing maintenance or replacing new parts can be reduced to the cost of replacing a single component. At the same time, due to the convenience of self-replacement, the original two-week time is reduced to two days, shortening the entire maintenance cycle, improving the availability of the train, and further ensuring the train's on-line rate.

[0118] 3. Thanks to the fact that the basic tester can automatically generate data charts according to the current performance of the inverter, if it is applied to daily maintenance, it can eliminate the potential safety hazards caused by inverter failures to a certain extent, prevent the occurrence of repeated failures, ensure the quality of the inverter, and guarantee the safe operation of the main line trains.

[0119] It should be noted that unless otherwise clearly specified and limited, the similar words such as "set", "connected", and "connected" used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can also be the communication inside two components. Those skilled in the art can understand its specific meaning in this application according to the specific situation. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0120] The above embodiments are only further descriptions of the present invention and do not limit the present invention in other forms. The present invention can also have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding modifications and changes according to the present invention, but these corresponding modifications and changes should all fall within the protection scope of the present invention.

Claims

1. An emergency inverter tester for subway train air conditioners, characterized in that, Comprising: A basic tester and a load simulator; The load simulator is connected to the basic tester, and the load simulator is used to simulate the operating conditions of the ventilation unit; The basic tester is externally connected to a power supply, and the basic tester includes: A switching power supply module, the switching power supply module is respectively connected to the power supply and the emergency inverter under test, and the switching power supply module controls the on / off between the power supply and the basic tester or the emergency inverter under test or the load simulator; An analog input module, the analog input module is respectively connected to the power supply, the emergency inverter under test and the switching power supply module, the analog input module receives the signals output by the power supply, the emergency inverter under test and the switching power supply module, processes the received signals into analog signals and outputs them; A transmitter module, the transmitter module is arranged between the analog input module and the power supply, the emergency inverter under test, the switching power supply module, the transmitter module converts the signals output by the power supply, the emergency inverter under test and the switching power supply module into standard signals, and transmits the standard signals to the analog input module; A human-machine interaction module, the human-machine interaction module is connected to the emergency inverter under test and the analog input module, the human-machine interaction module issues instructions to control the emergency inverter under test, the human-machine interaction module receives the analog signals output by the analog input module and processes them to obtain test data and / or test results, and the human-machine interaction module displays the obtained test data and / or test results; A measurement interface module, the measurement interface module is connected to the human-machine interaction module, the measurement interface module is used to directly measure one or more parameters of the emergency inverter under test and transmit them to the human-machine interaction module, and one or more parameters of the emergency inverter under test are test data; A data transmission interface module, the data transmission interface module is connected to the human-machine interaction module, the data transmission interface module is externally connected to a storage device, and the test data is exported to the storage device through the human-machine interaction module.

2. The subway train air conditioner emergency inverter tester according to claim 1, wherein The load simulator includes a driving module and a magnetoresistor, the driving module drives the magnetoresistor, the resistance of the magnetoresistor is adjustable, and the magnetoresistor is used to simulate the operating conditions of the ventilation unit.

3. The subway train air conditioner emergency inverter tester according to claim 2, characterized in that, The human-machine interaction module includes a human-machine interface and a programmable logic controller, the programmable logic controller receives the instructions issued by the human-machine interface to control the emergency inverter under test, the programmable logic controller is connected to the analog input module, the analog signals of the analog input module are converted into digital signals through an A / D converter and sent to the programmable logic controller, the programmable logic controller receives the digital signals and processes them to obtain test data and outputs them to the human-machine interface, and the human-machine interface displays the test data.

4. The subway train air conditioner emergency inverter tester according to claim 3, wherein A button unit is arranged on the human-machine interface, and the button unit includes: Main screen button. After the main screen button is pressed, the main screen is displayed. The main screen includes an inverter power-on button, a three-phase motor loading button, and an inverter start button. When the inverter power-on button is pressed, power is supplied to the emergency inverter under test. When the inverter button is pressed, the KM1 contactor closes to start the emergency inverter under test or the KM1 contactor opens to stop the emergency inverter under test. When the three-phase motor loading button is pressed, the KM2 contactor closes to start or the KM2 contactor opens to stop the drive module in the load simulator. There is an emergency inverter timing button on the touch screen, and the emergency inverter timing button is used to set the operating time of the emergency inverter under test. After the operating time ends, the emergency inverter under test stops automatically. One or more types of test data are displayed on the human-machine interface, and the test data includes the real-time values of voltage, current, and frequency; Resistance and capacitance detection button. When the resistance and capacitance detection button is pressed, the resistance and capacitance inside the emergency inverter under test are measured. One or more types of test data are displayed on the human-machine interface, and the test data includes resistance values and capacitance values; Export button. When the export button is pressed, one or more types of test data are exported, and the test data includes the real-time values of voltage, current, and frequency, resistance values, and capacitance values; Test report button. When the test report button is pressed, a test report is generated and displayed. The test report includes test data and / or test results, and the test results are qualified or unqualified.

5. The subway train air conditioner emergency inverter tester according to claim 4, characterized in that, The human-machine interface also includes a fault setting button. Press the fault setting button to enter the fault setting interface, and the fault setting interface is used to indicate the faults of the emergency inverter under test.

6. The subway train air-conditioning emergency inverter tester according to claim 3, characterized in that, An emergency button module is provided on the basic tester. The emergency button module includes a DC voltage loading button and a load loading button. When the DC voltage loading button is pressed, power is supplied to the emergency inverter under test. When the load loading button is pressed, the KM2 contactor closes to start or the KM2 contactor opens to stop the drive module in the load simulator.

7. The subway train air conditioner emergency inverter tester according to claim 3, characterized in that, There is at least one analog quantity expansion module on the programmable logic controller, and the analog quantity expansion module is used to increase the input channels of signals.

8. The subway train air-conditioning emergency inverter tester according to claim 1, characterized in that, The basic tester also includes a reluctance torque regulator. The reluctance torque regulator is connected to the switch power supply module, and the reluctance torque regulator is connected to the reluctance on the load simulator to adjust the resistance of the reluctance.

9. The subway train air-conditioning emergency inverter tester according to claim 1, characterized in that, The switch power supply module includes a first switch power supply module and a second power supply module. After the switch power supply module is connected to the power supply, the power supply is sent to the first switch power supply module and the second switch power supply module respectively; Among them, the first switch power supply module supplies power to the emergency inverter under test or the load simulator; The second switch power supply module supplies power to the basic tester.

10. The subway train air conditioner emergency inverter tester according to claim 9, characterized in that, The first switching power supply module is an AC220V / DC80 - 135V adjustable switching power supply module, the second power supply module is an AC220V / DC24V switching power supply module, and the power supply is an AC220V power supply. After the switching power supply module is connected to the AC220V power supply, the AC220V power supply is respectively sent to the AC220V / DC80 - 135V adjustable switching power supply module and the AC220V / DC24V switching power supply module; Among them, the AC220V / DC80 - 135V adjustable switching power supply module outputs an adjustable voltage DC 80 - 135V power supply to supply power to the emergency inverter or load simulator under test; The AC220V / DC24V switching power supply module outputs a DC 24V power supply to supply power to each module on the basic tester.

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