CN216411943U - Test board for control panel of air conditioner inverter of railway passenger car - Google Patents
Test board for control panel of air conditioner inverter of railway passenger car Download PDFInfo
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- CN216411943U CN216411943U CN202123005902.9U CN202123005902U CN216411943U CN 216411943 U CN216411943 U CN 216411943U CN 202123005902 U CN202123005902 U CN 202123005902U CN 216411943 U CN216411943 U CN 216411943U
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Abstract
The utility model discloses a test board for a control board of an air-conditioning inverter power supply of a railway passenger car, which belongs to the technical field of train test instruments.A protection input circuit, a pre-charging circuit, a middle supporting circuit, a three-phase bridge inverter circuit and an alternating current output filter circuit are arranged between an input socket of a shell of the test board and an input port of a screen of the test board; the output ends of the input voltage sensor, the intermediate voltage sensor, the current sensor and the output voltage sensor are correspondingly connected with the input end of the PLC through the main control board respectively, and the output end of the PLC is correspondingly connected with the input contactor and the pre-charging contactor through the main control board respectively and is connected with the modulation signal input contactor through the main control board and the drive board in sequence; the PLC is correspondingly connected with the touch screen of the test bed. The utility model can solve the problems that the existing test of the control panel of the inverter power supply of the air conditioner of the railway passenger car needs to be installed for testing, the data of key points can not be measured, and the faults of the main control panel and the drive panel are difficult to judge.
Description
Technical Field
The utility model relates to the technical field of train test instruments, in particular to a test bench for a control panel of an air-conditioning inverter power supply of a railway passenger car.
Background
The inverter power supply of the air conditioner of the railway passenger car is used as the core equipment of the electric appliances of the railway passenger car, the stability of the inverter power supply of the air conditioner of the railway passenger car is directly related to the safety and the stability of each electric appliance of the passenger car, and the main reason of the fault of the inverter power supply of the air conditioner of the railway passenger car is that the main control panel of the core of the inverter power supply of the railway passenger car breaks down due to high use frequency, poor heat dissipation performance and difficult daily maintenance, and the improvement of the overhaul quality of the main control panel of the core is the key of the improvement of the quality of the whole vehicle-mounted inverter power supply; at present, the test for the control panel of the inverter power supply of the air conditioner of the railway passenger car is carried out by direct installation, and the problems that data of some key points cannot be collected and detected in a targeted manner according to actual field requirements due to structures and installation positions, whether the data are accurate or not cannot be known, and the faults of a main control panel and a drive panel are difficult to judge exist.
SUMMERY OF THE UTILITY MODEL
The utility model provides a test board for a control board of an air-conditioning inverter power supply of a railway passenger car, which can solve the problems that data of some key points cannot be collected and detected in a targeted manner according to actual field requirements due to the structure and the installation position in the test of the control board of the air-conditioning inverter power supply of the existing railway passenger car, whether the data is accurate or not cannot be known, and the faults of a main control board and the drive board are difficult to judge.
In order to solve the problems, the technical scheme adopted by the utility model is as follows: the test board for the control board of the inverter power supply of the air conditioner of the railway passenger car comprises a shell, wherein an input socket for inputting a tested direct-current power supply of the passenger car is formed in the wall body of the shell, a test bed touch screen is arranged at the top end of the shell, and an input protection circuit, a pre-charging circuit, an intermediate supporting circuit, a three-phase bridge inverter circuit and an alternating-current output filter circuit are sequentially connected between the input socket in the shell and an input port of the test bed screen; the input protection circuit is connected with an input voltage sensor and an input contactor for controlling the input protection circuit to start and stop; the pre-charging circuit is connected with a pre-charging contactor for controlling the start and stop of the pre-charging circuit; the middle supporting circuit is connected with a middle voltage sensor and a modulation signal input contactor; the output end of the three-phase bridge type inverter circuit is connected with a current sensor, and the output end of the alternating current output filter circuit is connected with an output voltage sensor; the signal output end of the input voltage sensor, the signal output end of the intermediate voltage sensor, the signal output end of the current sensor and the signal output end of the output voltage sensor are respectively and correspondingly connected with the signal input end of a PLC (programmable logic controller) through a main control board, and the signal output end of the PLC is respectively and correspondingly connected with the coil of the input contactor and the coil of the pre-charging contactor through the main control board and is correspondingly connected with the coil of the modulation signal input contactor through the main control board and a driving board; and the signal end of the PLC is correspondingly connected with the signal end of the touch screen of the test bed.
In the above technical solution, a more specific technical solution may also be: still be equipped with when the circuit is unusual in the casing prevent that the fault diffusion leads to the power scaling loss with the output buffer circuit that AC output filter circuit's output is connected, be connected with on the output buffer circuit through the main control board with PLC's signal output part corresponds the output contactor that meets, PLC receives the feedback signal of AC output filter circuit input compares rather than interior predetermined power signal value scope, if surpass this power signal value scope, then control output contactor disconnection.
Further: the input protection circuit comprises a direct current filter for removing high-frequency harmonics of an input power signal, an output positive electrode of the direct current filter is connected with a positive electrode contact of the input contactor in series through a fast melting fuse, an output negative electrode of the direct current filter is connected with a negative electrode contact of the input contactor in series, and the input voltage sensor is connected between the output positive electrode and the output negative electrode of the direct current filter.
Further: the pre-charging circuit comprises a charging resistor which is connected with the anode contact of the input contactor in series and used for reducing voltage and limiting current, the charging resistor is connected with the contact of the pre-charging contactor in parallel, and then connected with the input anode of the middle supporting circuit after being connected with the diode in series.
Further: the middle supporting circuit comprises a filtering unit, the filtering unit comprises two branches which are connected in series, one end of each branch is connected with the output anode of the direct current filter, the other end of each branch is connected with the output cathode of the direct current filter, each branch is formed by connecting three capacitors in parallel, and two ends of each capacitor of one branch are respectively connected with a voltage-sharing resistor in parallel; the intermediate voltage sensor is connected between the output positive electrode and the output negative electrode of the filtering unit; and after the contact of the modulation signal input contactor is connected with the current-limiting resistor in series, one end of the modulation signal input contactor is connected with the output negative electrode of the filtering unit, and the other end of the modulation signal input contactor is connected with the input end of the driving plate.
Further: and three current sensors are respectively connected in series with the three-phase output lines of the three-phase bridge inverter circuit.
Further: the alternating current output filter circuit comprises a front-stage LC filter unit and an EMI filter connected behind the LC filter unit, and the number of the output voltage sensors is two, and the two output voltage sensors are respectively connected between three-phase load input lines of the EMI filter.
Further: the output isolation circuit comprises an isolation transformer connected with a three-phase load input line of the EMI filter, and a contact of the output contactor is connected between the EMI filter and the isolation transformer.
Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:
according to the test board for the control board of the air-conditioning inverter power supply of the railway passenger car, the direct-current power supply of the passenger car to be tested is connected with the input socket of the power supply of the shell of the test board, so that all parameters to be tested can be input through the touch screen of the test board, and the result of experimental data can be displayed, so that the detection of the air-conditioning inverter power supply of the railway passenger car and the judgment of the faults of the main control board and the drive board of the air-conditioning inverter power supply of the railway passenger car are realized, the measurement is simple and convenient, and the data is accurate.
Drawings
FIG. 1 is a schematic structural diagram of a test board for a control panel of an air-conditioning inverter power supply of a railway passenger car.
FIG. 2 is a control schematic block diagram of the test board for the control panel of the inverter power supply of the air conditioner of the railway carriage.
Fig. 3 is a circuit diagram of the test board for the control board of the air-conditioning inverter power supply of the railway carriage.
Detailed Description
The utility model will be further described in detail with reference to the following examples:
fig. 1, fig. 2, the railway passenger train air conditioner invertion power supply control panel testboard that fig. 3 shows, including casing 101, offer the input socket that is used for the passenger train direct current power supply of input test on the wall body of casing 101, positive pole socket a and negative pole socket b, the top of casing 101 is equipped with test bench touch-sensitive screen 102, input protection circuit 1, pre-charge circuit 2, middle supporting circuit 3, three-phase bridge inverter circuit 4 and alternating current output filter circuit 5 have connected gradually between the input socket in casing 101 and the input port of test bench screen 102.
The input protection circuit 1 comprises a direct current filter 1-1, an input voltage sensor 1-2 and an input contactor 1-3, wherein the output anode of the direct current filter 1-1 is connected with the anode contact of the input contactor 1-3 in series through a fast melting fuse 1-4, the output cathode of the direct current filter 1-1 is connected with the cathode contact of the input contactor 1-3 in series, and the input voltage sensor 1-2 is connected between the output anode and the output cathode of the direct current filter 1-1; the direct current filter 1-1 is used for removing high-frequency harmonics of an input power supply signal; the input contactor 1-3 is used for controlling the start and stop of the input protection circuit 1; the input protection circuit 1 is used for filtering high-frequency harmonic waves of an input power supply and realizing the overvoltage and undervoltage protection function of the circuit.
The pre-charging circuit 2 comprises a charging resistor 2-1 and a pre-charging contactor 2-2, the charging resistor 2-1 is connected with an anode contact of the input contactor 1-3 in series, the charging resistor 2-1 is connected with a contact of the pre-charging contactor 2-2 in parallel, and then is connected with a diode 2-3 in series and then is connected with an input anode of the middle supporting circuit 3; the charging resistor 2-1 is used for reducing voltage and limiting current, the pre-charging contactor 2-2 is closed to be used for the three-phase bridge type inverter circuit 4 after starting, the pre-charging circuit 2 is used for reducing voltage and limiting current, and the phenomenon that two ends of a capacitor are burnt due to overvoltage in the moment of power transmission of a middle supporting circuit is avoided.
The middle supporting circuit 3 comprises a filtering unit 3-1, a middle voltage sensor 3-2 and a modulation signal input contactor 3-3, the filtering unit 3-1 comprises two branches which are connected in series, one end of each branch is connected with the output anode of the direct current filter 1-1, the other end of each branch is connected with the output cathode of the direct current filter 1-1, each branch is formed by connecting three capacitors 3-1-1 in parallel, and two ends of the capacitor 3-1-1 of one branch are respectively connected with a voltage-sharing resistor 3-1-2 in parallel; the intermediate voltage sensor 3-2 is connected between the output anode and the output cathode of the filter unit 3-1; one end of a contact of the modulation signal input contactor 3-3 is connected with the output cathode of the filtering unit after being connected with the current limiting resistor 3-4 in series, and the other end of the contact is connected with the input end of the driving plate; the intermediate supporting circuit 3 is used for filtering high-frequency harmonic waves and ripples in the input circuit and ensuring the stability of direct-current input voltage; the voltage-sharing resistor plays a role in discharging electric energy stored in the capacitor after the equipment is stopped and protecting the equipment.
The three-phase bridge type inverter circuit 4 consists of three IGBTs, and three current sensors 4-1 are respectively connected in series with three-phase output wires of the respective three-phase bridge type inverter circuit; the three-phase bridge inverter circuit 4 is used for converting an input direct-current voltage into a three-phase symmetrical standard sine-wave alternating current.
The alternating current output filter circuit 5 comprises a front-stage LC filter unit 5-1, an EMI filter 5-2 connected behind the LC filter unit 5-1 and an output voltage sensor 5-3; the alternating current output filter circuit 5 is used for filtering high-frequency harmonic waves in the sine waves so as to obtain three-phase symmetrical standard sine alternating current voltage.
An output isolation circuit 6 connected with the output end of the alternating current output filter circuit 5 is further arranged in the shell 101, the output isolation circuit 6 comprises an output contactor 6-1 and an isolation transformer 6-2, and a contact of the output contactor is connected between the EMI filter 5-2 and the isolation transformer 6-2; the output isolation circuit 6 is used for preventing the power supply from burning due to fault diffusion when the circuit is abnormal.
The signal output end of the input voltage sensor 1-2, the signal output end of the intermediate voltage sensor 3-1, the signal output end of the current sensor 4-1 and the signal output end of the output voltage sensor 5-3 are correspondingly connected with the signal input end of the PLC 9 through a main control board 7 respectively, the signal output end of the PLC 9 is correspondingly connected with the coil of the input contactor 1-3, the coil of the pre-charging contactor 2-2 and the coil of the output contactor 6-1 through the main control board 7 respectively, and is correspondingly connected with the coil of the modulation signal input contactor 3-3 through the main control board 7 and the drive board 8 in sequence; the PLC 9 is correspondingly connected with the signal end of the touch screen 102 of the test bed.
When in detection, the main control board respectively receives the voltage information of the output end of the direct current filter detected by the input voltage sensor in real time, the voltage information of the output end of the filtering unit detected by the middle voltage sensor in real time, the current information of the output end of the three-phase bridge inverter circuit detected by the current sensor in real time and the three-phase symmetrical standard sine alternating current voltage information of the output end of the alternating current output filtering circuit detected by the output voltage sensor and the output voltage sensor in real time and transmits the information to the PLC, the PLC compares the information with the preset value input by the touch screen of the test bed, judges and processes the information and transmits the information to the touch screen for display, thereby realizing the detection of the air-conditioning inverter power supply of the railway passenger train and the judgment of the faults of the main control board and the driving board of the railway passenger train, and simultaneously, when the voltage value of the output end of the direct current filter reaches the preset voltage value range in the PLC, the main control board controls the contact of the pre-charging contactor to be closed, starting an input protection circuit to realize the over-voltage and under-voltage protection function of the circuit and complete the normal input of a power supply; when the voltage value of the output end of the filtering unit reaches the preset voltage value range in the main control board, the main control board respectively controls the contact of the pre-charging contactor and the contact of the modulation signal input contactor to be closed, at the moment, stable direct-current voltage which reaches the input end of the filtering unit through voltage reduction and current limitation and is filtered of high-frequency harmonic waves and ripple waves and pulse width modulation signals output by the main control board simultaneously reach the input end of a three-phase bridge type inverter circuit, and three-phase symmetrical standard sine wave alternating current is generated after the stable direct-current voltage and the pulse width modulation signals pass through the three-phase bridge type inverter circuit; when the main control board receives the feedback signal of the alternating current output filter circuit, the feedback signal is compared with a power supply signal value range preset in the main control board, if the feedback signal exceeds the power supply signal value range, the output contactor is controlled to be disconnected, and power supply burning loss caused by fault diffusion is prevented.
The utility model can input each parameter to be tested through the touch screen of the test bench and display the result of the experimental data by connecting the direct current power supply of the passenger train to be tested with the input socket of the power supply of the shell of the test bench, thereby not only realizing the detection of the inverter power supply of the air conditioner of the passenger train and the judgment of the faults of the main control board and the drive board of the inverter power supply, but also realizing simple and convenient measurement and accurate data.
Claims (8)
1. The utility model provides a passenger train air conditioner invertion power supply control panel testboard which characterized in that: the device comprises a shell, wherein an input socket for inputting a tested passenger car direct-current power supply is formed in the wall body of the shell, a test bed touch screen is arranged at the top end of the shell, and an input protection circuit, a pre-charging circuit, a middle supporting circuit, a three-phase bridge type inverter circuit and an alternating-current output filter circuit are sequentially connected between the input socket in the shell and an input port of the test bed screen; the input protection circuit is connected with an input voltage sensor and an input contactor for controlling the input protection circuit to start and stop; the pre-charging circuit is connected with a pre-charging contactor for controlling the start and stop of the pre-charging circuit; the middle supporting circuit is connected with a middle voltage sensor and a modulation signal input contactor; the output end of the three-phase bridge type inverter circuit is connected with a current sensor, and the output end of the alternating current output filter circuit is connected with an output voltage sensor; the signal output end of the input voltage sensor, the signal output end of the intermediate voltage sensor, the signal output end of the current sensor and the signal output end of the output voltage sensor are respectively and correspondingly connected with the signal input end of a PLC (programmable logic controller) through a main control board, and the signal output end of the PLC is respectively and correspondingly connected with the coil of the input contactor and the coil of the pre-charging contactor through the main control board and is correspondingly connected with the coil of the modulation signal input contactor through the main control board and a driving board; and the signal end of the PLC is correspondingly connected with the signal end of the touch screen of the test bed.
2. The test bench for control boards of inverter power supplies of air conditioners of railway carriages as claimed in claim 1, wherein: still be equipped with when the circuit is unusual in the casing prevent that the fault diffusion leads to the power scaling loss with the output buffer circuit that AC output filter circuit's output is connected, be connected with on the output buffer circuit through the main control board with PLC's signal output part corresponds the output contactor that meets, PLC receives the feedback signal of AC output filter circuit input compares rather than interior predetermined power signal value scope, if surpass this power signal value scope, then control output contactor disconnection.
3. The test bench for the control board of the inverter power supply of the air conditioner of the railway passenger car as claimed in claim 2, wherein: the input protection circuit comprises a direct current filter for removing high-frequency harmonics of an input power signal, an output positive electrode of the direct current filter is connected with a positive electrode contact of the input contactor in series through a fast melting fuse, an output negative electrode of the direct current filter is connected with a negative electrode contact of the input contactor in series, and the input voltage sensor is connected between the output positive electrode and the output negative electrode of the direct current filter.
4. The test bench for control boards of inverter power supplies of air conditioners of railway carriages as claimed in claim 3, wherein: the pre-charging circuit comprises a charging resistor which is connected with the anode contact of the input contactor in series and used for reducing voltage and limiting current, the charging resistor is connected with the contact of the pre-charging contactor in parallel, and then connected with the input anode of the middle supporting circuit after being connected with the diode in series.
5. The test bench for control boards of inverter power supplies of air conditioners of railway carriages as claimed in claim 4, wherein: the middle supporting circuit comprises a filtering unit, the filtering unit comprises two branches which are connected in series, one end of each branch is connected with the output anode of the direct current filter, the other end of each branch is connected with the output cathode of the direct current filter, each branch is formed by connecting three capacitors in parallel, and two ends of each capacitor of one branch are respectively connected with a voltage-sharing resistor in parallel; the intermediate voltage sensor is connected between the output positive electrode and the output negative electrode of the filtering unit; and after the contact of the modulation signal input contactor is connected with the current-limiting resistor in series, one end of the modulation signal input contactor is connected with the output negative electrode of the filtering unit, and the other end of the modulation signal input contactor is connected with the input end of the driving plate.
6. The test bench for control boards of inverter power supplies of air conditioners of railway carriages as claimed in claim 5, wherein: and three current sensors are respectively connected in series with the three-phase output lines of the three-phase bridge inverter circuit.
7. The test bench for control boards of inverter power supplies of air conditioners of railway carriages as claimed in claim 6, wherein: the alternating current output filter circuit comprises a front-stage LC filter unit and an EMI filter connected behind the LC filter unit, and the number of the output voltage sensors is two, and the two output voltage sensors are respectively connected between three-phase load input lines of the EMI filter.
8. The test bench for control boards of inverter power supplies of air conditioners of railway carriages as claimed in claim 7, wherein: the output isolation circuit comprises an isolation transformer connected with a three-phase load input line of the EMI filter, and a contact of the output contactor is connected between the EMI filter and the isolation transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005902.9U CN216411943U (en) | 2021-12-02 | 2021-12-02 | Test board for control panel of air conditioner inverter of railway passenger car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005902.9U CN216411943U (en) | 2021-12-02 | 2021-12-02 | Test board for control panel of air conditioner inverter of railway passenger car |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216411943U true CN216411943U (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123005902.9U Active CN216411943U (en) | 2021-12-02 | 2021-12-02 | Test board for control panel of air conditioner inverter of railway passenger car |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216411943U (en) |
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2021
- 2021-12-02 CN CN202123005902.9U patent/CN216411943U/en active Active
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