CN220475620U - Single-phase inverter of detection vehicle - Google Patents
Single-phase inverter of detection vehicle Download PDFInfo
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- CN220475620U CN220475620U CN202321332528.XU CN202321332528U CN220475620U CN 220475620 U CN220475620 U CN 220475620U CN 202321332528 U CN202321332528 U CN 202321332528U CN 220475620 U CN220475620 U CN 220475620U
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 239000003990 capacitor Substances 0.000 claims description 16
- 238000007689 inspection Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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- Electric Propulsion And Braking For Vehicles (AREA)
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Abstract
The utility model relates to a single-phase inverter of a detection vehicle, which comprises an input breaker, a filter, a contactor, a three-phase rectifier bridge module, an H-bridge circuit formed by IGBT and a power frequency transformer, wherein the input breaker is connected with the filter; the input end of the input breaker is electrically connected with single-phase alternating current output by a traction transformer on the motor train unit, the output end of the input breaker is electrically connected with the input end of the filter, the output end of the filter is electrically connected with the input end of the contactor, the output end of the contactor is electrically connected with the three-phase rectifier bridge module, and the contactor is further electrically connected with an external AC220V power supply. The utility model can ensure that the motor train unit detection vehicle is in the range of AC 276V-AC 496V and can stably output the voltage in the range of AC 209V-AC 231V; the normal work of the load on the vehicle can be ensured, and a protection mechanism corresponding to the input undervoltage or overvoltage is not triggered; electromagnetic interference of an input power supply of the motor train unit detection vehicle is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of motor train unit detection, and particularly relates to a single-phase inverter of a detection vehicle.
Background
On the existing motor train unit detection vehicle, single-phase AC400V output by a traction transformer on the vehicle is used as a power supply, is reduced to AC220V through a single-phase isolation transformer, and then supplies power for detection equipment on the detection vehicle.
Because the power supply of the motor train unit detection vehicle is directly induced from the contact net, the voltage fluctuation range is very large and reaches AC 276V-AC 496V, and the load on the vehicle is often protected due to input undervoltage or overvoltage, so that the normal operation of the detection equipment is seriously influenced. In addition, when the train accelerates or decelerates, the harmonic content of the input power supply is extremely large, and the electromagnetic interference is serious.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a single-phase inverter for a detection vehicle.
This kind of inspection car single-phase dc-to-ac converter includes: the input circuit breaker, the filter, the contactor, the three-phase rectifier bridge module, the H-bridge circuit composed of IGBT and the power frequency transformer; the input end of the input breaker is electrically connected with single-phase alternating current output by a traction transformer on the motor train unit, the output end of the input breaker is electrically connected with the input end of the filter, the output end of the filter is electrically connected with the input end of the contactor, the output end of the contactor is electrically connected with the three-phase rectifier bridge module, and the contactor is also electrically connected with an external AC220V power supply; a precharge current limiting resistor and an input contactor which are mutually connected in parallel are also arranged on one connecting line between the contactor and the three-phase rectifier bridge module; the three-phase rectifier bridge module is electrically connected with an H-bridge circuit formed by IGBT, and a plurality of groups of capacitors are arranged between the three-phase rectifier bridge module and the H-bridge circuit formed by IGBT; the H-bridge circuit composed of IGBT is electrically connected with the power frequency transformer, and an inductor is arranged on one connecting line between the H-bridge circuit composed of IGBT and the power frequency transformer; the output end of the power frequency transformer is connected with a capacitor in parallel and then is electrically connected with the power supply input end of the motor train unit detection vehicle;
the input breaker is used for receiving the single-phase alternating current output by the traction transformer on the motor train unit, performing overcurrent protection and controlling the on-off of the single-phase alternating current;
the filter is used for filtering the single-phase alternating current received by the input circuit breaker;
the contactor is used for controlling the on-off of an external AC220V power supply;
the three-phase rectifier bridge module is used for receiving the single-phase alternating current and rectifying and outputting the single-phase alternating current into pulsating direct current;
the H-bridge circuit is composed of IGBT and is used for receiving the pulsating direct current and performing high-frequency inversion and voltage stabilization on the pulsating direct current;
and the power frequency transformer is used for receiving the direct current processed by the H-bridge circuit formed by the IGBT and electrically isolating the direct current.
Preferably, the single-phase inverter of the detection vehicle adopts a spring terminal, and the spring terminal is arranged at the input end of the input breaker and the output end of the power frequency transformer, so that quick electrical connection is realized.
Preferably, the detection vehicle single-phase inverter is a 6kVA single-phase inverter or a 20kVA single-phase inverter; the 6kVA single-phase inverter and the 20kVA single-phase inverter have the same electrical topology, and components in the electrical topology are the same.
Preferably, the operating environment temperature for the single-phase inverter of the detection vehicle is-40 ℃ to +40 ℃, and the applicable altitude is 3600m or less.
Preferably, the plurality of groups of capacitors arranged between the three-phase rectifier bridge module and the H-bridge circuit formed by the IGBT are two groups of capacitors connected in series: each group of serially connected capacitors is formed by connecting two capacitors in parallel; for precharge.
The beneficial effects of the utility model are as follows:
the utility model designs a single-phase inverter of a detection vehicle, which adopts a power frequency transformer to realize the electrical isolation between input and output and ensure the stable signal sampling;
the utility model can ensure that the motor train unit detection vehicle is in the range of AC 276V-AC 496V and can stably output the voltage in the range of AC 209V-AC 231V; the normal work of the load on the vehicle can be ensured, and a protection mechanism corresponding to the input undervoltage or overvoltage is not triggered; electromagnetic interference of an input power supply of the motor train unit detection vehicle is greatly reduced.
Drawings
Fig. 1 is a schematic diagram of a single-phase inverter of a test vehicle.
Reference numerals illustrate: the input breaker 1, the filter 2, the contactor 3, the three-phase rectifier bridge module 4, the H bridge circuit 5 composed of IGBT, the power frequency transformer 6.
Detailed Description
The utility model is further described below with reference to examples. The following examples are presented only to aid in the understanding of the utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Example 1
As an example, as shown in fig. 1, a single-phase inverter of a detection vehicle is a 6kVA single-phase inverter or a 20kVA single-phase inverter; the electrical topological structures of the 6kVA single-phase inverter and the 20kVA single-phase inverter are the same, components in the electrical topological structures are the same, and only control parameters are different; the device is arranged in a detecting train upper cabinet of the motor train unit; comprising the following steps: the input breaker 1, the filter 2, the three-phase rectifier bridge module 4, the H-bridge circuit 5 composed of IGBT and the power frequency transformer 6; the input end of the input breaker 1 is electrically connected with single-phase alternating current output by a traction transformer on the motor train unit, the output end of the input breaker 1 is electrically connected with the input end of the filter 2, the output end of the filter 2 is electrically connected with the input end of the contactor 3, the output end of the contactor 3 is electrically connected with the three-phase rectifier bridge module 4, and the contactor 3 is also electrically connected with an external AC220V power supply; a precharge current limiting resistor and an input contactor which are mutually connected in parallel are also arranged on one connecting line between the contactor 3 and the three-phase rectifier bridge module 4; the three-phase rectifier bridge module 4 is electrically connected with an H-bridge circuit 5 composed of IGBT, and two groups of capacitors connected in series are further arranged between the three-phase rectifier bridge module 4 and the H-bridge circuit 5 composed of IGBT: each group of serially connected capacitors is formed by connecting two capacitors in parallel; for precharging; the H-bridge circuit 5 composed of IGBT is electrically connected with the power frequency transformer 6, and an inductor is arranged on one connecting line between the H-bridge circuit 5 composed of IGBT and the power frequency transformer 6; the output end of the power frequency transformer 6 is connected with a capacitor in parallel and then is electrically connected with the power supply input end of the motor train unit detection vehicle; the single-phase inverter of the detection vehicle adopts a spring terminal which is arranged at the input end of the input breaker 1 and the output end of the power frequency transformer 6, so that quick electrical connection is realized;
the input breaker 1 is used for receiving the single-phase alternating current output by the traction transformer on the motor train unit, performing overcurrent protection and controlling the on-off of the single-phase alternating current;
a filter 2 for filtering the single-phase alternating current received by the input breaker 1;
the contactor 3 is used for controlling the on-off of an external AC220V power supply;
the three-phase rectifier bridge module 4 is used for receiving the single-phase alternating current and rectifying and outputting the single-phase alternating current into pulsating direct current;
the H-bridge circuit 5 is composed of IGBT and is used for receiving the pulsating direct current and performing high-frequency inversion and voltage stabilization on the pulsating direct current;
and the power frequency transformer 6 is used for receiving the direct current processed by the H-bridge circuit 5 formed by the IGBT and electrically isolating the direct current.
The single-phase inverter of the detection vehicle converts the single-phase AC400V output by the traction transformer on the motor train unit into AC220V sine wave output after the single-phase AC400V is subjected to voltage reduction and filter pressing;
the operating environment temperature suitable for the single-phase inverter of the detection vehicle is-40 ℃ to +40 ℃, and the applicable altitude is 3600m or less.
Claims (5)
1. A single-phase inverter for a test vehicle, comprising: the power frequency transformer comprises an input circuit breaker (1), a filter (2), a contactor (3), a three-phase rectifier bridge module (4), an H-bridge circuit (5) consisting of IGBT and a power frequency transformer (6);
the input end of the input circuit breaker (1) is electrically connected with single-phase alternating current output by a traction transformer on the motor train unit, the output end of the input circuit breaker (1) is electrically connected with the input end of the filter (2), the output end of the filter (2) is electrically connected with the input end of the contactor (3), the output end of the contactor (3) is electrically connected with the three-phase rectifier bridge module (4), and the contactor (3) is also electrically connected with an external AC220V power supply; a precharge current limiting resistor and an input contactor which are mutually connected in parallel are also arranged on one connecting line between the contactor (3) and the three-phase rectifier bridge module (4); the three-phase rectifier bridge module (4) is electrically connected with an H-bridge circuit (5) formed by IGBT, and a plurality of groups of capacitors are arranged between the three-phase rectifier bridge module (4) and the H-bridge circuit (5) formed by IGBT; an H-bridge circuit (5) composed of IGBT is electrically connected with a power frequency transformer (6), and an inductor is arranged on one connecting line between the H-bridge circuit (5) composed of IGBT and the power frequency transformer (6); the output end of the power frequency transformer (6) is connected with a capacitor in parallel and then is electrically connected with the power supply input end of the motor train unit detection vehicle;
the input circuit breaker (1) is used for receiving the single-phase alternating current output by the traction transformer on the motor train unit, performing overcurrent protection and controlling the on-off of the single-phase alternating current;
a filter (2) for filtering the single-phase alternating current received by the input breaker (1);
the contactor (3) is used for controlling the on-off of an external AC220V power supply;
the three-phase rectifier bridge module (4) is used for receiving the single-phase alternating current and rectifying and outputting the single-phase alternating current into pulsating direct current;
an H-bridge circuit (5) composed of IGBT is used for receiving the pulsating direct current and performing high-frequency inversion and voltage stabilization on the pulsating direct current;
and the power frequency transformer (6) is used for receiving the direct current processed by the H-bridge circuit (5) formed by the IGBT and electrically isolating the direct current.
2. The inspection vehicle single-phase inverter according to claim 1, wherein: the single-phase inverter of the detection vehicle adopts a spring terminal which is arranged at the input end of the input breaker (1) and the output end of the power frequency transformer (6).
3. The inspection vehicle single-phase inverter according to claim 1, wherein: the single-phase inverter of the detection vehicle is a 6kVA single-phase inverter or a 20kVA single-phase inverter.
4. The inspection vehicle single-phase inverter according to claim 1, wherein: the operating environment temperature suitable for the single-phase inverter of the detection vehicle is-40 ℃ to +40 ℃, and the applicable altitude is 3600m or less.
5. The single-phase inverter of the detection vehicle according to claim 1, wherein the plurality of groups of capacitors arranged between the three-phase rectifier bridge module (4) and the H-bridge circuit (5) composed of IGBTs are two groups of capacitors connected in series: each group of serially connected capacitors is formed by connecting two capacitors in parallel; for precharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321332528.XU CN220475620U (en) | 2023-05-30 | 2023-05-30 | Single-phase inverter of detection vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321332528.XU CN220475620U (en) | 2023-05-30 | 2023-05-30 | Single-phase inverter of detection vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220475620U true CN220475620U (en) | 2024-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321332528.XU Active CN220475620U (en) | 2023-05-30 | 2023-05-30 | Single-phase inverter of detection vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220475620U (en) |
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2023
- 2023-05-30 CN CN202321332528.XU patent/CN220475620U/en active Active
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