CN217112533U - Fault diagnosis device of train three-phase line system inverter - Google Patents
Fault diagnosis device of train three-phase line system inverter Download PDFInfo
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- CN217112533U CN217112533U CN202220041681.6U CN202220041681U CN217112533U CN 217112533 U CN217112533 U CN 217112533U CN 202220041681 U CN202220041681 U CN 202220041681U CN 217112533 U CN217112533 U CN 217112533U
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Abstract
The utility model relates to a fault diagnosis device of a three-phase system inverter of a train, which comprises an industrial personal computer, an exchanger, a test case, a power supply and a data acquisition board card; the industrial personal computer is electrically connected with the inverter through a communication line and is used for providing a test operation platform for a user; the industrial personal computer is also electrically connected with a switch, and the switch is a transfer station of Ethernet network data and is used for providing network data for the whole fault device; the power supply is arranged in the test case and used for supplying power in the fault diagnosis process; the data acquisition board card is electrically connected with the industrial personal computer and is used for acquiring +/-10V analog quantity data through the AI plug-in unit according to the instruction of the industrial personal computer. The fault diagnosis device can quickly realize real-time online fault diagnosis of the inverter and provide high-efficiency maintenance for daily life; and the maintenance result can be effectively managed. The fault diagnosis device is relatively complete and independent, and can be quickly transplanted to platforms for transmission system detection, transmission system online test and the like.
Description
Technical Field
The utility model relates to a there is rail train field, especially relates to a fault diagnosis device of train three-phase line system dc-to-ac converter.
Background
The core component of the metro vehicle is a transmission device, wherein one of the core components of the inverter transmission device is widely distributed in circuits such as an auxiliary power supply and a main transformer traction circuit, and the inverter transmission device inverts a direct current voltage into a three-phase alternating current voltage to provide a stable three-phase four-wire system alternating current voltage for traction power, an air conditioner, an air compressor, a lighting and control circuit and the like. The inverter plays key conversion and interface roles in the whole transmission system, but is a failure-occurring link, and the running state of the inverter directly influences the driving safety and the running efficiency of the locomotive vehicle.
Inverter trouble mainly is IGBT open circuit trouble and short circuit fault, because when taking place short circuit fault, can take place bypass diode breakdown or IGBT short circuit, and has series fuse on the IGBT generally, and the instantaneous current that flows through increases, and the fuse fuses, also can lead to the short circuit. The inverter belongs to a high-power product and comprises 6 high-power IGBT modules, a large capacitor, a heat dissipation device, a pulse distribution circuit and the like. Construction 1: 1, when the test environment measures the functions or the performances of the device, high voltage and large current are involved, the test environment is complex, and the requirement on the operation level of a tester is high.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is necessary to provide a fault diagnosis device for a three-phase wire-system inverter of a train.
The utility model provides a fault diagnosis device of a train three-phase line system inverter, which comprises an industrial personal computer, a switch, a test case, a power supply and a data acquisition board card; the industrial personal computer is electrically connected with the inverter through a communication line and is used for providing a test operation platform for a user; the industrial personal computer is also electrically connected with a switch, and the switch is a transfer station of Ethernet network data and is used for providing network data for the whole fault device; the power supply is arranged in the test case and used for supplying power in the fault diagnosis process; the data acquisition board card is electrically connected with the industrial personal computer and acquires +/-10V analog quantity data through the AI plug-in unit according to the instruction of the industrial personal computer.
Furthermore, the industrial personal computer is connected with a signal control unit, and the signal control unit is electrically connected with the inverter through a signal wire and used for collecting diagnosis data of the inverter.
Further, the external electric connection of the test cabinet is AC220V alternating current.
Furthermore, the test case comprises a communication interface plug-in, a pulse output plug-in, a digital input and output plug-in, an AI plug-in, a constant current source plug-in, a switching power supply plug-in, an SMC plug-in, a matrix switch plug-in and a program control resistor plug-in; the test cabinet is used for conditioning various signals in the diagnosis process.
Further, the signal control unit is electrically connected between the control power supply U1 and the industrial personal computer.
Furthermore, the industrial personal computer, the switch, the power supply and the data acquisition board card are positioned inside the test case.
Further, the power supply comprises a control power supply U1, one end of the control power supply U1 is electrically connected to AC220V alternating current, and the control power supply U1 is used for converting AC220V alternating current into DC110V power supply to provide working power for the tester case.
Further, the power supply further comprises a module power supply U2, one end of the module power supply U2 is electrically connected to AC220V AC, and the other end is electrically connected to the inverter, and the module power supply U2 is configured to convert AC220V AC into DC110V power, so as to provide a working power supply for the inverter.
The utility model has the advantages that: the utility model discloses a fault diagnosis device of a train three-phase line inverter, which can more rapidly realize the test of the train three-phase line inverter;
simulating a normal working condition, realizing accurate positioning of the inverter fault, and diagnosing the fault position of the specific IGBT;
the fault diagnosis device of the train three-phase line system inverter comprises an industrial personal computer, a switch, a test case, a power supply and a data acquisition board card; the industrial personal computer is electrically connected with the inverter through a communication line and is used for providing a test operation platform for a user; the industrial personal computer is also electrically connected with a switch, and the switch is a transfer station of Ethernet network data and is used for providing network data for the whole fault device; the power supply is arranged in the test case and used for supplying power in the fault diagnosis process; the data acquisition board card is electrically connected with the industrial personal computer and acquires +/-10V analog quantity data through the AI plug-in unit according to the instruction of the industrial personal computer. The fault diagnosis device can quickly realize real-time online fault diagnosis of the inverter and provide high-efficiency maintenance for daily life; according to the fault diagnosis device, the maintenance result can be effectively managed. The fault diagnosis device is relatively complete and independent, and can be quickly transplanted to platforms for transmission system detection, transmission system online test and the like.
Drawings
Fig. 1 is a schematic structural diagram of a fault diagnosis device of a three-phase wire-system inverter of a train in one embodiment;
FIG. 2 is a logic diagram of a three-phase inverter fault diagnosis in one embodiment;
fig. 3 is a circuit model diagram of a three-phase inverter according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the present embodiment provides a fault diagnosis apparatus for a train three-phase line-system inverter, including an industrial personal computer, a switch, a test case, a power supply, and a data acquisition board card; the industrial personal computer is electrically connected with the inverter through a communication line and is used for providing a test operation platform for a user; the industrial personal computer is also electrically connected with a switch, and the switch is a transfer station of Ethernet network data and is used for providing network data for the whole fault device; the power supply is arranged in the test case and used for supplying power in the fault diagnosis process; the data acquisition board card is electrically connected with the industrial personal computer and acquires +/-10V analog quantity data through the AI plug-in unit according to the instruction of the industrial personal computer.
Specifically, as shown in fig. 2, in the fault diagnosis process, the fault diagnosis apparatus first supplies DC110V starting power to the inverter through the module power supply U2. Then, the industrial personal computer controls the SMC through test software to command the digital input and output plug-in unit to output a +24VTTL level to the inverter. And observing the switch state of the tube below the ABC three-phase upper tube on the software test interface. And acquiring a fault feedback signal of the inverter through the digital input-output plug-in, and directly judging whether the fault feedback is normal or not. When the inverter works, when the power switches at different positions have open-circuit faults, the actual value of the midpoint voltage of the bridge arms and the normal value of the voltage between the bridge arms can present different fault characteristics. These features can be used to detect and locate power switch tube faults. And respectively calculating expected average bridge arm midpoint voltage and actual bridge arm midpoint voltage by using the existing semaphore in the system and a circuit model thereof, and accurately diagnosing by using the difference between the expected average bridge arm midpoint voltage and the actual bridge arm midpoint voltage. The fault diagnosis device can quickly realize real-time online fault diagnosis of the inverter and provide high-efficiency maintenance for daily life; according to the fault diagnosis device, the maintenance result can be effectively managed. The fault diagnosis device is relatively complete and independent, and can be quickly transplanted to platforms for transmission system detection, transmission system online test and the like.
Preferably, the industrial personal computer is connected with a signal control unit, and the signal control unit is electrically connected with the inverter through a signal wire and used for acquiring diagnosis data of the inverter. The industrial personal computer is an industrial control computer provided with a test program, and provides a good test operation platform for a user through the industrial personal computer and the signal control unit. After the test is finished, the industrial personal computer forms a test report according to the test result, and the report can be stored, inquired, printed and the like.
Preferably, the test chassis comprises a communication interface plug-in, a pulse output plug-in, a digital input and output plug-in, an AI plug-in, a constant current source plug-in, a switching power supply plug-in, an SMC plug-in, a matrix switch plug-in and a program-controlled resistor plug-in; the test cabinet is used for conditioning various signals in the diagnosis process.
Preferably, the signal control unit is electrically connected between the control power supply U1 and the industrial personal computer. Furthermore, the industrial personal computer, the switch, the power supply and the data acquisition board card are positioned inside the test case.
Preferably, the test cabinet is electrically connected externally with AC220V alternating current. Further, the power supply comprises a control power supply U1, one end of the control power supply U1 is electrically connected to AC220V alternating current, and the control power supply U1 is used for converting AC220V alternating current into DC110V power supply to provide working power for the tester case. Further, the power supply also comprises a module power supply U2, one end of the module power supply U2 is electrically connected to the AC220V alternating current, the other end is electrically connected to the inverter, and the module power supply U2 is used for converting the AC220V alternating current into the DC110V power supply to provide the working power supply for the inverter.
In this embodiment, mainly for single-tube faults and double-tube faults, as shown in fig. 3, by analyzing the circuit principle of the inverter, it is easy to obtain a specific deviation state and a switching of the deviation state for each condition, and obtain the following fault diagnosis table of the inverter module:
vdc and dx are direct-current side voltage and upper tube duty ratio, H represents that the inter-phase voltage difference is greater than the allowable deviation, N represents that the inter-phase voltage difference is within a normal range, and L represents that the inter-phase voltage difference is less than the allowable deviation. The test software compares the measurement result with an expected value, combines factors such as measurement errors and the like, and sets a proper deviation allowable value according to experience, so that the fault can be quickly diagnosed, and a specific fault point can be positioned.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A fault diagnosis device of a train three-phase line system inverter is characterized by comprising an industrial personal computer, a switch, a test case, a power supply and a data acquisition board card; the industrial personal computer is electrically connected with the inverter through a communication line and is used for providing a test operation platform for a user; the industrial personal computer is also electrically connected with a switch, and the switch is a transfer station of Ethernet network data and is used for providing network data for the whole fault device; the power supply is arranged in the test case and used for supplying power in the fault diagnosis process; the data acquisition board card is electrically connected with the industrial personal computer and acquires +/-10V analog quantity data through the AI plug-in unit according to the instruction of the industrial personal computer.
2. The fault diagnosis device of the train three-phase wire system inverter according to claim 1, wherein the industrial personal computer is connected with a signal control unit, and the signal control unit is electrically connected with the inverter through a signal wire and used for collecting diagnosis data of the inverter.
3. The apparatus for diagnosing a fault in a three-phase wire-system inverter of a train as claimed in claim 1, wherein the test cabinet is electrically connected with AC220V AC power externally.
4. The apparatus of claim 1, wherein the tester box comprises a communication interface plug-in, a pulse output plug-in, a digital input and output plug-in, an AI plug-in, a constant current source plug-in, a switching power supply plug-in, an SMC plug-in, a matrix switch plug-in, and a programmable resistance plug-in; the test cabinet is used for conditioning various signals in the diagnosis process.
5. The apparatus of claim 2, wherein the signal control unit is electrically connected between a control power source U1 and the industrial personal computer.
6. The fault diagnosis device for the train three-phase line inverter according to claim 1, wherein the industrial personal computer, the switch, the power supply and the data acquisition board card are located inside the test case.
7. The apparatus of claim 2, wherein the power supply comprises a control power supply U1, one end of the control power supply U1 is electrically connected to AC220V AC, and the control power supply U1 is configured to convert AC220V AC into DC110V power to provide working power for the test box.
8. The apparatus of claim 2, wherein the power supply further comprises a module power supply U2, the module power supply U2 is electrically connected to AC220V AC at one end and to the inverter at the other end, and the module power supply U2 is configured to convert AC220V AC to DC110V power to provide operating power for the inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220041681.6U CN217112533U (en) | 2022-01-06 | 2022-01-06 | Fault diagnosis device of train three-phase line system inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220041681.6U CN217112533U (en) | 2022-01-06 | 2022-01-06 | Fault diagnosis device of train three-phase line system inverter |
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| Publication Number | Publication Date |
|---|---|
| CN217112533U true CN217112533U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220041681.6U Active CN217112533U (en) | 2022-01-06 | 2022-01-06 | Fault diagnosis device of train three-phase line system inverter |
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| CN (1) | CN217112533U (en) |
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2022
- 2022-01-06 CN CN202220041681.6U patent/CN217112533U/en active Active
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