An emergency power supply performance and capacity detection system for a motor train unit
By integrating human-machine interface screens, switches, control units, and wireless communication systems, the complexity and error problems of emergency power supply testing for high-speed trains have been solved, achieving efficient and accurate testing results and automated operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 昆明铁道职业技术学院(昆明市教育对外合作交流中心)
- Filing Date
- 2025-05-06
- Publication Date
- 2026-05-29
AI Technical Summary
Existing methods for testing emergency power supplies in high-speed trains are complex, involve a variety of tools, suffer from wiring errors, and cannot accurately record the testing process, which affects on-site operational efficiency and costs.
The system combines a human-machine interface screen, a switch, a control unit, a load, and a data acquisition module. It achieves automatic detection through PLC control and wireless communication, transmits data using Ethernet communication protocol and 5G wireless communication, and integrates load simulation and result judgment.
It has realized the digitalization and automation of the performance and capacity testing of emergency power supplies for high-speed trains, reducing human error, improving testing efficiency and accuracy, and reducing costs.
Smart Images
Figure CN224303825U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of EMU maintenance, and particularly relates to a performance and capacity detection system for the emergency power supply of an EMU. Background Technique
[0002] The emergency power supply of an EMU is an emergency device used when the battery of the EMU fails to start the auxiliary air compressor. Usually, each EMU formation will be equipped with a set of emergency power supply devices in the car when operating online, and this device is the last barrier to ensure the normal operation of the EMU.
[0003] The working load of the emergency power supply of the EMU is the auxiliary air compressor of the EMU, and it is necessary to ensure that the air pressure can reach more than 750 Kpa. Therefore, there are strict requirements for the output voltage, current and continuous discharge time of the emergency power supply of the EMU, and the regular detection work of this device is particularly important.
[0004] The existing detection methods for the emergency power supply of EMUs usually use a multimeter to detect the input and output voltages, use a clamp-on ammeter to detect the output current, and use a single 5Ω / 2000W resistor to simulate the load to detect the working current. When detecting its overload function, 2 5Ω / 2000W resistors are connected in parallel for detection. For capacity detection, when the working current is 20A, the continuous time is not less than 1000s as qualified, and usually an artificial stopwatch timing method is used. The above detection process involves a variety of detection tools and is judged by manual supervision, resulting in problems such as complex detection processes, many types of designed tools and measuring instruments, wiring errors, and inability to accurately record the detection process, seriously affecting the on-site operation efficiency and increasing the detection cost. Summary of the Invention
[0005] The purpose of the utility model is to provide a performance and capacity detection system for the emergency power supply of an EMU, so as to solve the problems of complex detection processes, many types of designed tools and measuring instruments, wiring errors, and inability to accurately record the detection process proposed in the above background technique.
[0006] To achieve the above purpose, the technical solution of the utility model is specifically as follows:
[0007] A performance and capacity detection system for the emergency power supply of an EMU, characterized by comprising: a human-machine interaction screen, a switch, a control unit, a load, and a data acquisition module. The HMI screen is connected to the switch, and the switch is simultaneously connected to the control unit. The control unit is connected to the data acquisition module. The data acquisition module collects the input, output voltages and working current of the emergency power supply device of the EMU. The control unit is connected to the load. The switch is connected to a wireless module, and the wireless module and the mobile terminal achieve wireless communication.
[0008] In the above solution, the HMI screen and the switch are electrically connected.
[0009] In the above scheme, the switch, control unit, and wireless module are electrically connected in parallel, and the wireless module is connected to the mobile terminal through a 4G communication network.
[0010] In the above scheme, the control unit is electrically connected in parallel with the load, output voltage, operating current, and input voltage.
[0011] In the above scheme, the emergency power supply device of the EMU is electrically connected in parallel with the output voltage, operating current and input voltage.
[0012] In the above scheme, the switch, human-machine interface screen, control unit, and wireless module use the Ethernet communication protocol.
[0013] In the above scheme, the control unit can be selected as a PLC.
[0014] In the above scheme, the load is contactors KM1 and KM2 and resistors R1 and R2, wherein the resistance of R1 and R2 is 5Ω and the power of the resistors is not less than 2000W.
[0015] In the above scheme, the output voltage, operating current and input voltage are detected by a transmitter, and the output signal is DC0-10V.
[0016] In the above scheme, the HMI screen includes the following interfaces: main interface, no-load test, overcurrent protection, load test, capacity check, and history record.
[0017] The emergency power supply performance and capacity testing system for this high-speed train has a control unit configured to: receive the standard voltage value input from the HMI screen, collect the output voltage and input voltage signals of the emergency power supply, compare the collected voltage value with the HMI standard voltage value, and determine that the output voltage is qualified when the difference does not exceed the allowable range, and output the result on the HMI screen; the control unit is also configured to: during load testing, control resistor R1 to be connected in series to the output port of the emergency power supply to simulate the rated operating current, and simultaneously detect the output voltage and output current and transmit them to the HMI screen; during overload testing, control resistors R1 and R2 to be connected in parallel and then in series to the output port of the emergency power supply to simulate overload operation. The system operates by detecting the output voltage and current, and starts timing the overload current duration. If the overload current duration exceeds 2 seconds, the control unit disconnects the load from resistors R1 and R2. If the overload current duration does not exceed 2 seconds, the control unit determines that the overload protection function is effective and displays it on the HMI screen. During capacity testing, the HMI screen inputs the minimum voltage value and the rated current discharge time. Simultaneously, it controls R1 to be connected in series to the emergency power output port of the train set to simulate the rated operating current, detect the output voltage and current, and start timing. When the output voltage is lower than the minimum voltage value, the duration at this time is recorded, and it is determined whether the duration is greater than the rated current discharge time. The result is then displayed on the HMI screen.
[0018] In the above system, the standard voltage of the emergency power supply device for the EMU is DC90V; the rated operating current is 20A; the overload current is 40A; the rated current discharge time is 1000s; and the minimum output voltage is 90V.
[0019] The beneficial effects of this utility model are:
[0020] This invention relates to a method and equipment for testing the performance and capacity of emergency power supplies for high-speed trains. It enables digital debugging of functional and capacity tests, and achieves real-time data storage and transmission. By inputting judgment standard values through the HMI screen, the control unit can automatically perform testing and result judgment. This invention fully meets the requirements for input / output function testing and capacity testing under rated operating conditions of emergency power supply devices for high-speed trains. Simultaneously, it eliminates the problems of poor data reading timeliness and human error inherent in manual inspection, resulting in objective and accurate test results, saving manpower, and improving the working efficiency of the testing device.
[0021] The present invention relates to a method and equipment for testing the performance and capacity of emergency power supplies for high-speed trains. It adopts Ethernet communication and 5G wireless communication, and uses PLC for control and display, which facilitates the functional upgrade of the system for intelligent operation and maintenance. Attached Figure Description
[0022] Figure 1This is a flowchart illustrating the performance and capacity testing process of the emergency power supply for high-speed trains according to this utility model.
[0023] Figure 2 This is the electrical schematic diagram of the control unit of this utility model;
[0024] Figure 3 This is the electrical schematic diagram of the load of this utility model;
[0025] The reference numerals in the figure are as follows:
[0026] 1-HMI screen; 2-Switch; 3-Wireless module; 4-Mobile terminal; 5-Control unit; 6-Load; 7-Output voltage; 8-Output current; 9-Input voltage; 10-Electric train emergency power supply device; 11-Contactor KM1; 12-Contactor KM2; 13-Resistor R1; 14-Resistor R2. Detailed Implementation
[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Specific implementation methods are as follows:
[0028] like Figure 1 As shown, the design concept of a method for testing the performance and capacity of an emergency power supply for high-speed trains is as follows: A switch is used as the main communication device, Ethernet is used as the communication protocol, and a PLC is used as the control unit. The emergency power supply simulates no-load, load, and overload conditions through relay output control. A touchscreen serves as the human-machine interface for inputting test parameters and outputting test results. Wireless modules and mobile terminals are used for real-time data transmission. The control unit converts the output power, output current, and input voltage of the emergency power supply into PLC analog input signals via a voltage transmitter. This invention allows for setting standard values for the input and output voltages of the emergency power supply, the rated operating current, and the continuous operating time according to testing requirements. It can also automatically detect the output function and battery capacity of the emergency power supply, thereby eliminating testing errors inherent in manual testing.
[0029] The present invention will now be described in detail with reference to the accompanying drawings:
[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the test method and equipment for the performance and capacity of the emergency power supply of the EMU include: HMI screen 1, switch 2, wireless module 3, mobile terminal 4, control unit 5, load 6, output voltage 7, output current 8, input voltage 9, emergency power supply device of EMU 10, contactor 11, contactor 12, resistor 13, and resistor 14.
[0031] When the emergency power supply of the EMU is working normally, turn on the panel power and start the power output on the touch screen. The output voltage can stably output the rated voltage DC110V and the rated current 20A. If a short circuit or overload occurs at the output port, when the output current exceeds 40A, the emergency power supply fault buzzer will sound an alarm, the touch screen will indicate an overload fault, and the output voltage will stop. When performing electrical function maintenance on this type of EMU emergency power supply device, the output voltage value under no-load conditions must not be lower than 90V, and the difference between the measured output voltage and the voltage value displayed on the touch screen must not be greater than 1V; under rated load conditions, the output current value must not be greater than 21A, and the difference between the measured output current value and the current value displayed on the touch screen must not be greater than 1A; when the output current value exceeds 40A, the output of the EMU emergency power supply device will stop; under the rated operating conditions of 20A operating current and an output voltage not lower than 90V, the continuous discharge time of this device must not be less than 1000 seconds.
[0032] The PLC control unit's analog inputs AI1 and AI2 acquire the voltage from voltage transmitter VT1 to measure the voltage at the output of the emergency power supply device. AI2 acquires the voltage from voltage transmitter VT2 to measure the voltage at the input of the emergency power supply device. AI3 acquires the current from current transformer IT1 to measure the current at the output of the emergency power supply device. The PLC control unit's output Y0 controls contactor KM1, whose normally open contact is connected in series with resistors R1 and R2 in a parallel circuit. Output Y1 controls contactor KM2, whose normally open contact is connected in series with resistor R2. The PLC control unit and the touchscreen communicate via Ethernet to display the measured values of VT1, VT2, and IT1, as well as the engagement status of KM1 and KM2.
[0033] In this example, the PLC control unit uses a PLC model with 8IO or more relay outputs and 4AI analog inputs. KM1 and KM2 use DC24V contactors, and the output detection port and charging detection port interface types are matched with the output and charging port of the emergency power supply device. The working principle is analyzed below. Under no-load conditions, the PLC control unit controls Y0 and Y1 to have no output, controls KM1 and KM2 to not engage, disconnects the loads R1 and R2, and the voltage transmitter VT1 only measures the output voltage value of the train emergency power supply device (20). Under rated load conditions, the PLC control unit controls Y1 to output, controls KM2 to engage, the load R2 to work, the voltage transmitter VT1 measures the output voltage value of the train emergency power supply device (20), and the current transformer IT1 measures the output current. Under overload conditions, the PLC control unit controls Y0 and Y1 to output, controls KM1 and KM2 to engage, the loads R1 and R2 to work simultaneously, and the voltage transmitter VT1 measures the output voltage value of the train emergency power supply device (20). T1 measures the output voltage of the emergency power supply device (20) of the EMU, and IT1 measures the output current. VT2 directly measures the input voltage, and the voltage value is displayed on the touch screen. During the capacity test, the PLC control unit controls the output of Y1, controls KM2 to engage, and R2 load to work. VT1 measures the output voltage of the emergency power supply device (20) of the EMU. At the same time, the PLC control unit starts timing. When the output voltage is detected to be lower than 90V, Y1 has no output, KM2 loses power and disconnects the working load R2. The PLC control unit judges whether the test time is greater than 1000 seconds and displays the capacity test result on the touch screen according to the judgment result.
[0034] In summary, this invention designs a testing device based on existing high-speed train emergency power supply devices. It adds a PLC control unit and a touch screen, enabling no-load testing, load testing, overcurrent testing, and capacity testing of the high-speed train emergency power supply. It can also record the testing process and judge the test results. This achieves precise measurement and automated operation, eliminating the errors caused by manual testing using multimeters and stopwatches, while reducing operation time and labor costs. The system design of this invention is simple, stable, reliable, and highly operable.
[0035] The above embodiments are merely preferred examples of the technical solution of this utility model, and are not intended to limit the scope of protection of this patent. Any adaptive adjustments, equivalent substitutions, or improved designs made by those skilled in the art based on the technical teachings of this utility model and through conventional technical means to the implementation methods, as long as they do not deviate from the core technical concept of this utility model and can produce the same or similar technical effects, shall fall within the protection scope of this utility model. Specifically, this includes, but is not limited to, conventional optimization of structural parameters, reasonable substitution of material properties, and equivalent adjustments to the implementation process, all of which should be covered within the protection scope of the claims of this utility model.
Claims
1. A system for testing the performance and capacity of an emergency power supply for high-speed trains, characterized in that, include: HMI screen (1), switch (2), control unit (5), load (6), the HMI screen (1) and switch (2) are connected, and the switch is also connected to the control unit (5). The control unit collects the output voltage (7), output current (8) and input voltage (9) of the emergency power supply device of the EMU. The control unit is connected to the load (6). The switch (2) is connected to the wireless module (3). The wireless module (3) and the mobile terminal (4) realize wireless communication.
2. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The HMI screen (1) and the switch (2) are electrically connected.
3. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The switch (2), control unit (5), and wireless module (3) are electrically connected in parallel, and the wireless module (3) is connected to the mobile terminal (4) through a 4G communication network.
4. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The control unit (5) is electrically connected in parallel with the load (6), output voltage (7), output current (8), and input voltage (9).
5. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The emergency power supply device of the EMU and the output voltage (7), output current (8) and input voltage (9) are electrically connected in parallel.
6. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that... The switch (2) communicates with the HMI screen (1), control unit (5), and wireless module (3) using the Ethernet communication protocol.
7. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The control unit (5) is preferably a PLC.
8. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The load consists of contactors KM1 (11) and KM2 (12) and resistors R1 (13) and R2 (14), wherein the resistance values of R1 and R2 are both 5Ω and the power of the resistors is not less than 2000W.
9. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The output voltage (7), output current (8), and input voltage (9) are detected by a transmitter, and the output signals are all DC0-10V.
10. The system for testing the performance and capacity of an emergency power supply for a high-speed train according to claim 1, characterized in that, The HMI screen includes the following interfaces: main interface, no-load test, overcurrent protection, load test, capacity check, and history record.