Subway train traction module function aging test device
By designing the functional aging test device for the subway train traction module, the aging detection problem of PIM1 module is solved, the maintenance efficiency and safety are improved, and the operation cost is reduced.
Patent Information
- Application Number
- CN202422203208.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The subway train traction inverter module (PIM1) is prone to aging in a long-term high temperature and high pressure environment, has a high failure rate, and lacks existing testing equipment, resulting in difficulty in repair, high cost and safety hazards.
A subway train traction module functional aging test device is designed, including three-phase input power supply, high-voltage control cabinet, sensing signal module, MCU control unit, human-computer operation interface, PC upper computer, communication module, output load unit, etc., to realize systematic and comprehensive testing of the module, simulate high-voltage load aging, and adopt intuitive human-computer operation interface and closed-loop control.
It improves on-site maintenance efficiency, shortens maintenance cycle, ensures the reliability of the repaired module, reduces operating costs, reduces safety hazards, and realizes early performance detection of the PIM1 module.
Smart Images
Figure CN223180325U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field related to subway equipment, and particularly relates to a function aging test device for a subway train traction module. Background Art
[0002] The train traction inverter module (hereinafter referred to as PIM1) is an important part of the traction system. Its function is to convert the high-voltage direct current of the catenary into three-phase alternating current through inversion, so as to provide power output for the traction motor. The PIM1 module is composed of IGBTs. With the continuous extension of subway operation time and the gradual aging of the line, the failure rate of the PIM1 module is increasing year by year. Many IGBT modules have short-circuited and exploded, posing a great safety hazard to the subway catenary power supply system.
[0003] Due to working in a high-temperature and high-voltage environment for a long time, the train traction inverter module has unstable states and frequent failures. Once a failure occurs, the train will be unable to run, and only the entire module can be replaced. At present, the purchase unit price of this module is high, the purchase cycle is long, and the return factory maintenance cost is very high. For the replaced PIM1 module, there is a lack of effective detection equipment on site, and it is impossible to carry out fault repair on it, which is likely to cause a large backlog of defective parts on site.
[0004] The single weight of the train traction inverter module is about two hundred and fifty kilograms, and the module has a large volume. The on-site disassembly and installation process requirements are high, and a large amount of manpower and time are required for each assembly. In order to reduce the number of repeated installations by personnel and ensure that the repaired module can be used normally, a special device is urgently needed to conduct function aging tests on it before installation, so as to detect whether there are still potential fault hazards as early as possible and ensure that it can be delivered for use only after everything is normal. Content of the Utility Model
[0005] The purpose of the utility model is to provide a function aging test device for a subway train traction module that can effectively improve the on-site maintenance efficiency and shorten the maintenance cycle.
[0006] To achieve the above object, the utility model provides the following technical solutions: A function aging test device for a subway train traction module, including a three-phase input power supply, a high-voltage control cabinet, a sensing signal module, an MCU control unit, a human-machine operation interface, a PC host computer, a communication module, a first power supply, a mode switching module, a second power supply, an output load unit, a digital display module, and a protection circuit. The three-phase input power supply is connected to the high-voltage control cabinet through a high-voltage line; the high-voltage control cabinet is connected to the PIM module to be tested through a line; the signal terminal of the PIM module to be tested is connected to a sensing signal module; the sensing signal module connects the signals to the MCU control unit through a line; the signals transmitted by the sensing signal module specifically include feedback signals, temperature signals, frequency signals, and speed signals; the control terminal of the MCU control unit is connected to a human-machine operation interface; the human-machine operation interface is also connected to a PC host computer; the MCU control unit, the human-machine operation interface, and the PC host computer are all connected to each other through a communication module to achieve mutual communication; a mode switching module is also connected to the MCU control unit; the power supply terminals of the sensing signal module and the MCU control unit are connected to a first power supply through a line; one side of the PIM module to be tested is connected to a second power supply through a line; the output terminal of the PIM module to be tested is connected to an output load unit; both the output load unit and the high-voltage control cabinet are provided with digital display modules; a protection circuit is also connected to the PIM module to be tested.
[0007] As a further improvement of the utility model, a rectification module, a pre-charge circuit, a boost circuit, a rectification filter, and a high-voltage filter capacitor are arranged inside the high-voltage control cabinet. The rectification module rectifies and filters the three-phase voltage, and then goes to the pre-charge circuit to slowly store the DC voltage, and then is connected to the boost circuit. The boost circuit uses a reactor and an IGBT to form an adjustable BOOST boost circuit, and then becomes high voltage through the rectification filter and is stored in the high-voltage filter capacitor.
[0008] As a further improvement of the utility model, the set test modes of the mode switching module include a single-phase single-tube test mode, a single-phase double-tube test mode, and a three-phase full-bridge tube inversion test mode, and start and stop gears are also set.
[0009] As a further improvement of the utility model, the human-machine operation interface installs a ready-made test interface on a computer. The test interface includes a main control part and a manual adjustment test part. The main control part is used to control the power supply to turn on and display the voltage and current. The manual adjustment part is used to manually input the pulse width, switching frequency, and load size. The display interface of the human-machine operation interface uses a touch screen.
[0010] As a further improvement of the present utility model, both the first power supply and the second power supply adopt DC power supplies, and both supply power to the MCU control unit and the sensing signal module.
[0011] As a further improvement of the present utility model, the MCU control unit provides pulse generation and pulse drive for the PIM module to be tested. Specifically, it is connected through a serial port. When the test parameter values are manually input, the MCU control unit outputs a pulse signal to directly drive the subsequent PIM module to be tested. At the same time, the feedback signal of the PIM module to be tested is input into the MCU control unit to determine whether the measured parameters are normal, and the whole process forms a closed loop.
[0012] As a further improvement of the present utility model, the output load unit adopts a reactor and is directly connected to the output end of the PIM module to be tested, and the output current size is adjusted by adjusting the frequency size.
[0013] As a further improvement of the present utility model, the protection circuit monitors the high-voltage output value, three-phase inverter output voltage value and current value of the PIM module to be tested, and automatically disconnects to realize circuit protection when overcurrent or overload is detected.
[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: This technical solution can realize the systematic and comprehensive overall test of the inverter module PIM1 of Line 1 and the simulated high-voltage with-load aging test without relying on the vehicle system test, which is beneficial for the team to carry out module disassembly, assembly and testing. It not only improves the on-site maintenance efficiency, but also shortens the maintenance cycle, and the reliability of the repaired module is also guaranteed; This technical solution realizes the functional test of the traction inverter module PIM1, adopts an intuitive human-machine operation interface to realize the remote control of the whole set of equipment and system, uses a universal serial data port to connect the upper computer and the MCU control unit, etc., and sends and receives the status of the equipment and output equipment in real time, so as to determine whether the status of the equipment to be tested meets the parameter requirements; This technical solution also uses the access of high-power electrical equipment to age the module to be tested in high-voltage and high-current modes, and exposes the performance defects of the module as early as possible, providing good quality assurance for the team's maintenance test. Description of the Drawings
[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0016] In the figure: 1, three-phase input power supply; 2, high-voltage control cabinet; 3, sensing signal module; 4, MCU control unit; 5, human-machine operation interface; 6, PC upper computer; 7, communication module; 8, first power supply; 9, mode switching module; 10, second power supply; 11, output load unit; 12, digital display module; 13, protection circuit. Detailed Embodiment
[0017] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0018] Please refer to Figure 1 , the present utility model provides a technical solution: a function aging test device for a subway train traction module, including a three-phase input power supply 1, a high-voltage control cabinet 2, a sensing signal module 3, an MCU control unit 4, a human-machine operation interface 5, a PC host computer 6, a communication module 7, a first power supply 8, a mode switching module 9, a second power supply 10, an output load unit 11, a digital display module 12, and a protection circuit 13. The three-phase input power supply 1 is connected to the high-voltage control cabinet 2 through a high-voltage line; the high-voltage control cabinet 2 is connected to the to-be-tested PIM1 module through a line; the signal end of the to-be-tested PIM1 module is connected to the sensing signal module 3; the sensing signal module 3 communicates the signal to the MCU control unit 4 through a line; the signals transmitted by the sensing signal module 3 specifically include feedback signals, temperature signals, frequency signals, and speed signals; the control end of the MCU control unit 4 is connected to the human-machine operation interface 5; the human-machine operation interface 5 is also connected to the PC host computer 6; the MCU control unit 4, the human-machine operation interface 5, and the PC host computer 6 are all connected to each other through the communication module 7 to achieve mutual communication; a mode switching module 9 is also connected to the MCU control unit 4; the power supply ends of the sensing signal module 3 and the MCU control unit 4 are connected to the first power supply 8 through a line; one side of the to-be-tested PIM1 module is connected to the second power supply 10 through a line; the output end of the to-be-tested PIM1 module is connected to the output load unit 11; both the output load unit 11 and the high-voltage control cabinet 2 are provided with digital display modules 12; a protection circuit 13 is also connected to the to-be-tested PIM1 module.
[0019] The high-voltage control cabinet 2 is internally provided with a rectification module, a pre-charge circuit, a boost circuit, a rectification filter, and a high-voltage filter capacitor. The rectification module rectifies and filters the three-phase voltage, and then goes to the pre-charge circuit to slowly store the DC voltage, and then is connected to the boost circuit. The boost circuit uses a reactor and an IGBT to form an adjustable BOOST boost circuit, and then becomes high voltage through the rectification filter and is stored in the high-voltage filter capacitor.
[0020] The set test modes of the mode switching module 9 include single-phase single-tube test mode, single-phase double-tube test mode, and three-phase full-bridge tube inversion test mode, and start and stop gears are set; the human-machine operation interface 5 installs a ready-made test interface on the computer. The test interface includes a main control part and a manual adjustment test part. The main control part is used to control the power supply to turn on and display the voltage and current. The manual adjustment part is used to manually input the pulse width, switching frequency, and load size. The display interface of the human-machine operation interface 5 uses a touch screen display.
[0021] Both the first power supply 8 and the second power supply 10 adopt low-voltage DC power supplies, and both supply power to the MCU control unit 4 and the sensing signal module 3; the MCU control unit 4 provides pulse generation and pulse drive for the PIM1 module to be tested. Specifically, it is connected through a serial port. When manually inputting the test parameter values, the MCU control unit outputs pulse signals to directly drive the subsequent PIM1 module to be tested. At the same time, the feedback signal of the PIM1 module to be tested is input into the MCU control unit to determine whether the measured parameters are normal, and the whole process forms a closed loop.
[0022] The output load unit 11 is directly connected to the output end of the PIM1 module to be tested by a reactor, and the output current size is adjusted by adjusting the frequency size; the protection circuit 13 automatically disconnects to achieve circuit protection by monitoring the high-voltage output value, three-phase inversion output voltage value, and current value of the PIM1 module to be tested when detecting overcurrent or overload.
[0023] Currently, the PIM1 module on the current subway train is controlled by the traction Agate (Advanced Alstom Transport General Electronic Equipment). When a fault occurs, the traction Agate will record and feedback the corresponding fault code. However, the existing fault code can only indicate that a single-phase fault occurs, and it is impossible to know the specific cause of the faulty phase and whether the same fault will occur in other surrounding components.
[0024] At present, in addition to the obvious short-circuit burnout fault of the PIM1 module, there are also many occasional phenomena. For most modules with faults on the front line, the faults cannot be reproduced after being removed. Inspecting the IGBT, drive board, power supply board, etc. inside the inversion module shows no obvious abnormalities. According to the product data provided by the manufacturer, the common design parameters of the PIM1 module are: operating voltage DC1500V, IGBT switching frequency 650HZ, rated output power 1450kvA, output peak current 825A, etc. There is also no environment for separate module testing on-site, and there are certain risks and uncertainties in directly getting on the vehicle for testing.
[0025] 1) Set up a high-voltage control cabinet in the laboratory environment, use three-phase alternating current to rectify and change into adjustable direct current, with the voltage range from 0V to 2000V, and the output device is equipped with voltage and current displays, and a discharge protection circuit is built in.
[0026] 2) Design three test modes to facilitate single-tube testing, single-phase upper and lower tube testing, and three-phase full-bridge tube testing.
[0027] 3) Design a visual operation human-machine interface. All function interfaces are included on the display screen, and touch operations are used to complete input and output, set test parameters, load requirements, etc.
[0028] 4) Have a timed aging test function, monitor the high-voltage output value, three-phase inverter output voltage and current values, and also have overcurrent and overload protection functions.
[0029] The MCU control unit is connected with LEM sensors, which are mainly used to detect parameter values such as high-voltage circuits, phase voltages, and line currents. The output load unit 11 uses reactors, including three phases of L1, L2, and L3, and is directly connected to the output end of the PIM1 module to be tested. The output current size is adjusted by adjusting the frequency size. When in use, connect the PIM1 module to be tested according to the design of this technical solution, then set the parameters as needed, select the relevant test mode to test the PIM1 module to be tested, and determine whether the PIM1 module to be tested is in a normal state according to the signals transmitted by the sensing signal module, the output load unit, and the information of the connected relevant control and display devices. After detecting that the PIM1 module to be tested is normal, deliver it to the maintenance personnel for subsequent installation and use.
[0030] In order to better achieve automated operation, this test device adopts an integrated human-machine interface, which is completed by means of touch operations. Therefore, the MCGS-TPC7062KX type touch screen is selected, and the designed operation interface is embedded, including all the parameter indicators of the entire set of test devices. The interface is intuitive, the operation is simple, and the performance is reliable and stable.
[0031] All module components of this test device adopt off-the-shelf components, and the operation interface and system both adopt mature existing market products, which completely solve the problem of difficult maintenance and testing in the PIM1 laboratory of the subway department with a long operation time, overcome the previous lack of the ability of the subway department without PIM1 modules to repair independently. Traditionally, it was mainly sent to the original factory for repair. Due to the large volume of the module, the transportation cost and repair cost are very high, the repair cycle is very long, the procurement cost of a single spare part is expensive, and it alleviates the shortage of spare parts resulting in a tight situation of vehicle use on site. With the test device of this technical solution, the subway unit can get rid of the technical constraints of the equipment manufacturer, and the maintenance and operation costs are also greatly reduced, the flexibility is improved, and the on-site operation safety can also be effectively guaranteed.
[0032] Due to many occasional faults in the PIM1 module, it often reports faults on the front line, but the test in the depot is normal again, which brings great potential safety hazards to train operation. With this test device, the actual environment of the train can be better simulated, the problem of module performance aging can be exposed to the greatest extent, the occurrence of occasional situations can be curbed, and the stable operation of the traction system can be further guaranteed.
[0033] The above are only the preferred examples of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A function aging test device for a subway train traction module, characterized in that: It includes a three-phase input power supply (1), a high-voltage control cabinet (2), a sensing signal module (3), an MCU control unit (4), a human-machine operation interface (5), a PC host computer (6), a communication module (7), a first power supply (8), a mode switching module (9), a second power supply (10), an output load unit (11), a digital display module (12), and a protection circuit (13). The three-phase input power supply (1) is connected to the high-voltage control cabinet (2) through a high-voltage line; the high-voltage control cabinet (2) is connected to a to-be-tested PIM1 module through a line; the signal terminal of the to-be-tested PIM1 module is connected to a sensing signal module (3); the sensing signal module (3) interconnected with the MCU control unit (4) through a line; the signals transmitted by the sensing signal module (3) specifically include feedback signals, temperature signals, frequency signals, and speed signals; the control terminal of the MCU control unit (4) is connected to a human-machine operation interface (5); the human-machine operation interface (5) is also connected to a PC host computer (6); the MCU control unit (4), the human-machine operation interface (5), and the PC host computer (6) are interconnected through the communication module (7) to achieve mutual communication; a mode switching module (9) is also connected to the MCU control unit (4); the power supply terminals of the sensing signal module (3) and the MCU control unit (4) are connected to a first power supply (8) through a line; one side of the to-be-tested PIM1 module is connected to a second power supply (10) through a line; the output terminal of the to-be-tested PIM1 module is connected to an output load unit (11); the output load unit (11) and the high-voltage control cabinet (2) are both provided with a digital display module (12); a protection circuit (13) is also connected to the to-be-tested PIM1 module.
2. The function aging test device for a subway train traction module according to claim 1, wherein: The high-voltage control cabinet (2) is provided with a rectification module, a pre-charge circuit, a boost circuit, a rectification filter, and a high-voltage filter capacitor. The rectification module rectifies and filters the three-phase voltage, and then goes to the pre-charge circuit to slowly store the DC voltage, and then is connected to the boost circuit. The boost circuit uses a reactor and IGBT to form an adjustable BOOST boost circuit, and then becomes high voltage through the rectification filter and is stored in the high-voltage filter capacitor.
3. The function aging test device for a subway train traction module according to claim 1, wherein: The set test modes of the mode switching module (9) include a single-phase single-tube test mode, a single-phase double-tube test mode, and a three-phase full-bridge tube inversion test mode, and start and stop gears are also set.
4. The functional aging test device for a subway train traction module according to claim 1, characterized in that: The human-machine operation interface (5) installs a ready-made test interface on the computer. The test interface includes a main control part and a manual adjustment test part. The main control part is used to control the power supply to turn on and display voltage and current. The manual adjustment part is used to manually input the pulse width, switching frequency, and load size. The display interface of the human-machine operation interface (5) uses a touch screen.
5. The functional aging test device for a subway train traction module according to claim 1, wherein: Both the first power supply (8) and the second power supply (10) adopt DC power supplies to provide power for the MCU control unit (4) and the sensing signal module (3).
6. The functional aging test device for a subway train traction module according to claim 1, wherein: The MCU control unit (4) provides pulse generation and pulse drive for the PIM1 module under test. Specifically, it is connected through a serial port. When the test parameter values are manually input, the MCU control unit outputs a pulse signal to directly drive the subsequent PIM1 module under test. At the same time, the feedback signal of the PIM1 module under test is input into the MCU control unit to determine whether the measured parameters are normal, and the whole process forms a closed loop.
7. The function aging test device for a subway train traction module according to claim 1, wherein: The output load unit (11) uses a reactor to be directly connected to the output end of the PIM1 module under test, and adjusts the output current by adjusting the frequency.
8. A subway train traction module function aging test device according to claim 1, characterized in that: The protection circuit (13) monitors the high-voltage output value, three-phase inverter output voltage value and current value of the PIM1 module under test, and automatically disconnects to achieve circuit protection when overcurrent or overload is detected.