Traction inverter test system

Abstract

The utility model discloses a traction inverter test system which comprises a main control circuit and an alarm circuit. The main control circuit comprises a test upper computer, an insulation and voltage resistance tester, a programmable power supply, an oscilloscope, a signal generator, a voltage sensor, a current sensor, a relay module, a universal meter, a network switch and a serial port server, and the test upper computer is used for instrument control and product data acquisition; a network switch is respectively connected with an insulation voltage-withstanding tester, a programmable power supply, an oscilloscope, a signal generator and a universal meter, and a serial server is connected with a relay module, a current sensor and a voltage sensor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of rail transit traction inverter, and particularly relates to a traction inverter test system. BACKGROUND

[0002] The rail transit traction inverter is a device capable of converting the direct-current power supply of the power system into alternating-current power, and when working, the traction inverter receives the direct-current power supply transmitted by the vehicle and converts it into the high-frequency alternating-current power required by the vehicle so as to drive the operation of the traction motor of the vehicle. The traction inverter is the most important component in the train transmission system, and its operation reliability is particularly important. During the overhaul of the train, the traction inverter needs to be tested and repaired. The existing test method is that the traction inverter test is mainly manually tested by engineers, and the data is judged and recorded. During the manual test process, the engineers need to check the power supply and connection and simultaneously visually determine the output voltage and current of the traction inverter. The test process is long and needs to be completed by multiple engineers. The test data and results are subjectively determined and prone to errors. SUMMARY

[0003] In view of the above technical problems, the purpose of the present application is to avoid the influence of human factors and improve the test efficiency and accuracy, and to design a traction inverter test system which can realize the semi-automatic / automatic function detection of the traction inverter and meet the overhaul requirements of the traction inverter function and fault detection.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a traction inverter test system, comprising a main control circuit and an alarm circuit; the main control circuit comprises a test host computer, an insulation withstand voltage tester, a program-controlled power supply, an oscilloscope, a signal generator, a voltage sensor, a current sensor, a relay module, a multimeter, a network switch and a serial port server, the test host computer is used for instrument control and product data acquisition, the insulation withstand voltage tester, the program-controlled power supply, the oscilloscope, the signal generator and the multimeter are connected through the network switch, and the relay module, the current sensor and the voltage sensor are connected through the serial port server.

[0005] The alarm circuit comprises a program-controlled power supply, a relay module, a buzzer and a three-color lamp, the program-controlled power supply is used for power supply of the relay module, the buzzer and the three-color lamp, the relay module is used for executing buzzer alarm and feeding back fault information to the test computer when the test system has data anomaly.

[0006] The power distribution of the traction inverter test system is as follows: 50HZ three-phase four-wire 380V input power is converted into DC 1500V / 60A required by the test system through a transformer to provide PN pole input power for the traction inverter, DC 110V / 50A is provided for the input power of the inverter controller, 20VAC power is connected to the test system through a circuit breaker, connected to the boundary socket, and provides power input for the switching power supply, insulation withstand voltage tester, program-controlled power supply, signal generator, multimeter, network switch and serial server.

[0007] In the test system of the application, the voltage sensor is connected to the main circuit for real-time monitoring of the voltage value, and the current sensor is connected to the main circuit for real-time monitoring of the current.

[0008] In the test system of the application, the test host computer controls the signal generator to output a PWM pulse signal to complete the output of the drive signal of the traction controller to the traction inverter to realize inverter test, and the output of the traction inverter is connected to a three-phase load.

[0009] In the test system of the application, the test host computer controls the program-controlled power supply to supply power to the test drive board, the signal generator provides a control drive signal, and the test host computer judges whether there is an abnormality in the entire control circuit by reading back the feedback signal of the traction inverter, and performs alarm and closing control signal actions.

[0010] Compared with the prior art, the technical scheme adopted by the application has the following beneficial effects:

[0011] 1. In the test system of the application, the insulation performance of the traction inverter wiring and electrical installation is tested by using an insulation withstand voltage tester.

[0012] 2. In the test system of the application, the test host computer can control the signal generator to output standard PWM pulse signals, sine signals and other signal types, and can set various parameter types, and can save the signal input image of the signal generator without using an additional single drive signal board.

[0013] 3. In the test system of the application, the alarm circuit can detect the voltage threshold of the voltage sensor, the current threshold of the current sensor and the feedback signal threshold, realize the abnormal state monitoring of the test host computer, and prompt the test personnel to operate safely through the buzzer or signal lamp, and improve the protection of personnel safety and equipment.

[0014] 4. In the testing system of the present invention, the results can be automatically determined and the data can be displayed and saved in real time, avoiding the influence of human factors and improving the accuracy of the test. At the same time, the semi-automatic / automatic test also greatly reduces the test time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the traction inverter test system in this embodiment.

[0016] Figure 2 This is a schematic diagram of the power distribution of the traction inverter test system in this embodiment.

[0017] Figure 3 This is a schematic diagram of the circuit connection of the traction inverter test system in this embodiment. Detailed Implementation

[0018] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0019] like Figure 1 As shown in the schematic diagram of the traction inverter testing system in this embodiment, it includes a host computer, an insulation withstand voltage tester, a programmable power supply, an oscilloscope, a signal generator, a voltage sensor, a current sensor, a relay module, a multimeter, a network switch, and a serial port server. The host computer is used for instrument control and product data acquisition. It is connected to the insulation withstand voltage tester, the programmable power supply, the oscilloscope, the signal generator, and the multimeter through the network switch, and to the relay module, the current sensor, and the voltage sensor through the serial port server.

[0020] like Figure 2 As shown in the diagram, the power distribution connection of the traction inverter test system in this embodiment is as follows: the 50Hz three-phase four-wire 380V input power is converted by a transformer to provide the PN input power for the traction inverter with DC 1500V / 60A required by the test system; DC 110V / 50A provides the input power for the inverter controller; and 220VAC power is connected to the test system through a circuit breaker and connected to the boundary power strip, providing power input for the switching power supply, insulation withstand voltage tester, programmable power supply, signal generator, multimeter, network switch, and serial server, respectively.

[0021] like Figure 3 As shown in the diagram, the circuit connection diagram of the traction inverter test system in this embodiment is as follows: the voltage sensor is connected to the main circuit to monitor the voltage value in real time, the current sensor is connected to the main circuit to monitor the current in real time, and the test host computer reads back the command in real time through the serial port and judges whether the voltage and current are stable. If the voltage or current exceeds the limit, the alarm circuit and the power supply of the circuit will be triggered.

[0022] The test host computer controls the signal generator to output PWM pulse signals through instructions, so as to complete the test of the output driving signal of the traction controller to the traction inverter, and the traction inverter is connected to a three-phase load; the test host computer monitors the working state of the traction controller in real time through the feedback signal of the traction inverter read by the multimeter.

[0023] The test host computer controls the program-controlled power supply to supply power to the test driving board, the signal generator provides a control driving signal, and the test host computer judges whether there is an abnormality in the entire control circuit through the feedback signal of the traction inverter read by the multimeter, and performs an alarm and a control signal closing action.

[0024] In the embodiment, the test host computer is an industrial computer, and the model is: Advantech IPC-610L.

[0025] In the embodiment, the model of the relay module is Qingguo Wuliang TG-IO808-E.

[0026] To sum up, the above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A traction inverter test system, characterized by: Including main control circuit and alarm circuit;The main control circuit includes test host computer, insulation withstand voltage tester, program-controlled power supply, oscilloscope, signal generator, voltage sensor, current sensor, relay module, multimeter, network switch and serial server, the test host computer is used for instrument control and product data acquisition, connects insulation withstand voltage tester, program-controlled power supply, oscilloscope, signal generator and multimeter through network switch respectively, connects relay module, current sensor and voltage sensor through serial server.

2. The traction inverter test system of claim 1, wherein: The alarm circuit includes program-controlled power supply, relay module, buzzer and three-color lamp, the program-controlled power supply is used to power supply relay module, buzzer and three-color lamp, the relay module is used to execute buzzer alarm when the test system appears data exception and feedback fault information to test computer.

3. The traction inverter test system of claim 1, wherein: 50HZ three-phase four-wire system 380V input power supply is converted into DC 1500V / 60A required by test system via transformer to provide PN pole input power supply for traction inverter, DC 110V / 50A provides input power supply for inverter controller, 20VAC power supply is connected to test system through circuit breaker, is connected to limit plugboard, respectively provides power input for switching power supply, insulation withstand voltage tester, program-controlled power supply, signal generator, multimeter, network switch and serial server.

4. The traction inverter test system of claim 1, wherein: Voltage sensor is connected to main circuit for real-time monitoring of voltage value, current sensor is connected to main circuit for real-time monitoring of current, test host computer reads back instruction through serial port in real time and judges whether voltage and current are stable, if voltage or current exceeds limit value, alarm circuit and shutdown circuit will be triggered to supply power.

5. The traction inverter test system of claim 1, wherein: Test host computer outputs PWM pulse signal through instruction control signal generator to complete traction controller output drive signal to traction inverter to realize inverter test, and traction inverter output is connected to three-phase load;Test host computer monitors traction controller working state in real time through reading back multimeter traction inverter feedback signal.

6. The traction inverter test system of claim 1, wherein: Test host computer supplies power for test drive board through controlling program-controlled power supply, signal generator provides control drive signal, test host computer judges whether there is abnormality in the whole control circuit through reading back multimeter traction inverter feedback signal, and performs alarm and closes control signal action.

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