CN216485378U - Detection apparatus based on passenger train dc-to-ac converter drive plate and power strip - Google Patents

Abstract

The utility model relates to the technical field of traffic equipment detection, in particular to a detection device based on a railway passenger car inverter driving board and a power board. The power supply device comprises a power supply board voltage detection unit for supplying power; the upper driving plate arm and the lower driving plate arm are respectively composed of three independent IGBT driving equivalent circuits and a reverse polarity Boost adjusting circuit, the inverter power panel provides power for the upper driving plate arm and the lower driving plate arm, each reverse polarity Boost adjusting circuit is connected into the IGBT driving equivalent circuits, each IGBT driving equivalent circuit controls output levels to be connected with the G pole of each IGBT so as to achieve on-off control of a single IGBT, the display operation panel is connected with the upper driving plate arm of the middle connecting unit through a serial port I, and is connected with the lower driving plate arm of the middle connecting unit through a serial port II and used for operating manual or automatic trigger signals.

Description

Detection apparatus based on passenger train dc-to-ac converter drive plate and power strip

Technical Field

The utility model relates to the technical field of traffic equipment detection, in particular to a detection device based on a railway passenger car inverter driving board and a power board.

Background

The conventional non-conventional inverter (DC 600V/AC380V, 35KVA, hereinafter referred to as inverter) has a large holding capacity in the existing DC600V direct power supply 25-type passenger car, and according to field research, the production date of the PCB board of the inverter is concentrated in 2006-. According to the maintenance rule of the electrical device of the passenger car of the Chinese railway general company, the PCB plate should be replaced after being used for about 12 years. Because the existing number is large, the power supply box body assembly under the replacement bus can meet the requirements of factory repair, and therefore the normally pulled inverters of the existing passenger car still have a large number of service. In order to ensure that the power supply equipment under the passenger car smoothly turns to the conventional equipment, the maintenance of the old-type non-conventional equipment is still of great significance. According to the instruction manual published by the common traction company, the fault codes-4/-1F and-2F correspond to IGBT faults, but in practice, the fault codes contain the possibility of failure of a driving circuit in an IGBT driving board. The problem can be solved by replacing the upper and lower arm plates of the IGBT driving plate in field maintenance work. Accurate fault location of three identical sets of drive circuits in a single drive board is therefore particularly important for servicing of the PCB board.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a detection device based on a railway passenger car inverter driving board and a power board to solve the problems.

The technical scheme of the utility model is as follows:

detection apparatus based on passenger train inverter drive board and power strip includes:

the power panel voltage detection unit comprises six digital display type voltage meter heads and is used for measuring whether six groups of output voltage values of the inverter power panel of the intermediate connection unit meet requirements or not and judging the stability of the output voltage of the power panel detected by the six groups of digital display type voltage meter heads so as to supply power required by detection of the upper arm of the driving board and the lower arm of the driving board;

the intermediate connection unit is used for providing a working environment for displaying that the operating console meets the conditions, and comprises an inverter power supply board, a driving board upper arm and a driving board lower arm, wherein the driving board upper arm and the driving board lower arm are respectively composed of three groups of independent IGBT driving equivalent circuits and reverse polarity Boost adjusting circuits, the inverter power supply board supplies power to the reverse polarity Boost circuits of the driving board upper arm and the driving board lower arm, each group of reverse polarity Boost adjusting circuits is connected with the IGBT driving equivalent circuits, and each group of IGBT driving equivalent circuits controls output levels to be connected with the G pole of each IGBT so as to realize on-off control of the single IGBT;

the display operation platform is connected with the upper arm of the drive plate of the intermediate connection unit through a serial port I and connected with the lower arm of the drive plate of the intermediate connection unit through a serial port II, and comprises a manual switching module circuit, an automatic switching module circuit and a conducting signal circuit, and the display operation platform is used for operating a manual bit trigger signal and an automatic bit trigger signal and displaying whether the IGBT normally works or not.

After the serial port is in communication connection with the display console, the serial port is connected with a red LED lamp bead which is electrically connected between a high level and a pull-up resistor and used for displaying FAULT signals; after the serial port is in communication connection with the display console, the serial port I of the upper arm of the driving board and the serial port II of the lower arm of the driving board are connected with a point contact switch S7, and the point contact switch S7 is electrically connected between a high level and a current-limiting resistor and used for resetting.

In the technical scheme, the manual switching module circuit comprises point contact switches, LED lamp beads and current-limiting resistors, the high level of the manual switching module circuit is provided by an inverter power panel, each point contact switch is connected with one LED lamp bead and one current-limiting resistor and then is connected with the G pole of any one of the IGBTs 1-6,

in the technical scheme, the automatic switching module circuit comprises an I/O output port of the singlechip, wherein the I/O output port is electrically connected with an input end of the reverse polarity Boost adjusting circuit and is used for inverting after the I/O output port outputs a low level to drive the IGBT driving equivalent circuit by amplifying power.

In the technical scheme, the energy supply input end of the manual switching module circuit and the energy supply input end of the automatic switching module circuit are electrically connected to the inverter power panel through the single-pole double-throw switch, and manual bit and automatic bit switching is achieved through the single-pole double-throw switch.

In the technical scheme, the working state of the weak electric load of the upper arm or the lower arm of the driving plate is tested by taking +/-12V as a load power supply which simulates the potential difference output by an external device to be 24V. Due to the high-power characteristic of the selected type of the IGBT, any direct current not larger than DC600V can be selected as a load power supply of the IGBT. The 12V power supply supplies power to the input end of the bridge type IGBT to replace DC600V high voltage, so that the safety of operators is protected.

In the technical scheme, the selected voltage +/-12V is used as the IGBT load voltage, the conducting signal circuit comprises white LED lamp beads and resistors, one end of each two white LED lamp beads is connected between the E poles and the C poles of the two connected IGBTs after being reversely connected in parallel, and the other end of each white LED lamp bead is connected with one resistor and then grounded.

As a further improvement of the technical scheme of the utility model, the manual switching module circuit is additionally provided with a mis-touch prevention TTL circuit, namely IGBTs in the same phase cannot be conducted at the same time. The mis-touch prevention TTL circuit selects 3 groups of same TTL circuits, each group of TTL circuits is formed by connecting 1 NOR gate U1A and 2 NOR gates (U2A and U3A) in parallel, the input end of the NOR gate U1A of the TTL circuits is connected with the output end of the point touch switch, the output end of the NOR gate of the TTL circuits is connected with PWM 1-PWM 3 ports corresponding to the upper arm and the lower arm of the driving plate,

the concrete expression is as follows: input ends of three groups of NOR gates U1A are A1 and B2, A3 and B4, A5 and B6 respectively, output ends of the three groups of NOR gates are C1 and D2, C3 and D4, C5 and D6 respectively, pull-up resistor enhancing output signals are connected to the output ends of the OR gates C and D, and output ends of point touch switches S1, S3 and S5 are connected to A1, A3 and A5 respectively; the output ends of the point contact switches S2, S4 and S6 are respectively connected to B2, B4 and B6. The anti-false-touch outputs C1, C3 and C5 are accessed to corresponding PWM1, PWM2 and PWM3 in the serial port I of the upper arm of the drive board, and the anti-false-touch outputs D2, D4 and D6 are accessed to corresponding PWM1, PWM2 and PWM3 in the serial port II of the lower arm of the drive board.

Compared with the traditional point-by-point search type maintenance, the utility model has the following advantages:

this utility model device is brought into to 1 with the whole voltage types of inverter power strip output, and the operating condition under the normal operating mode of inverter power strip has been simulated to the at utmost.

2 because double-barrelled IGBT break-make frequency is high, it is comparatively loaded down with trivial details to adopt the multirange universal meter to measure 6 group IGBT's C utmost point and E interelectrode voltage reversal, through the break-make condition of 6 group LED lamp pearls on the display operation panel of this utility model device directly perceived reflection IGBT to break away from the maintenance and prejudged the trouble in earlier stage, and the maintenance is accomplished the debugging stage and is required to adorn former machine, lead to the heavy physical power of forceful electric power and the dangerous step of electric shock, the man-hour of fault diagnosis and maintenance debugging has been shortened greatly, the maintenance production efficiency is improved.

In addition, as the driving circuit and the communication line in the driving board are powered by normal working conditions, the device can be used for driving board stability and fatigue tests so as to improve the stability and durability of maintenance products.

Drawings

FIG. 1 shows the logical connection between the A316J driving equivalent circuit and the serial port I, wherein the serial port II is identical to the logical connection between the A316J driving equivalent circuit;

FIG. 2 is a logic diagram of the electrical connection of the present invention;

FIG. 3 is a flow chart of the inverter power board voltage scheme;

FIG. 4 is an IGBT working principle diagram;

FIG. 5 is an equivalent circuit of IGBT and manual bit triggering when a 12V power supply is used as a load;

FIG. 6 is a false-touch prevention logic circuit;

reference numerals: the high-frequency driving optical coupler A316J, the point contact switches S1-S6, the LED lamp beads LED 1-LED 12, the current limiting resistors R1A-R6A, the resistors R7A-R9A, the NOR gate U1A, the OR gate U2A and the OR gate U3A.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

In the present embodiment, the utility power AC220V is connected to the power module output DC110V as the voltage input of the designed device, the DC110V power is connected to the input end of the inverter power board (CP 3U 03), the input of the inverter power board (CP 3U 03) is the DC110V power, and the output is the independent 4-way +15V power, the ± 12V power and the +5V power, where ± 12V and +5V are common, as shown in fig. 3.

Detection apparatus based on passenger train inverter drive board and power strip includes:

and the power panel voltage detection unit is used for measuring whether six groups of output voltage values of the inverter power panel of the intermediate connection unit meet requirements or not, comprises six digital display type voltage meter heads, and respectively measures 4 groups of +15V power voltage, 1 group of +/-12V voltage and 1 group of +5V voltage. As shown in FIG. 3;

the intermediate connection unit is used for providing a working environment which meets the conditions of the display operation panel, and comprises an inverter power supply board, a driving board upper arm and a driving board lower arm, wherein the driving board upper arm and the driving board lower arm are both CDXX16 types, the driving board upper arm and the driving board lower arm are respectively composed of three independent groups of IGBT driving equivalent circuits (namely an A316J driving equivalent circuit and an equivalent circuit driven by an A316J chip) and a reverse polarity Boost adjusting circuit, the inverter power supply board provides three paths of power supplies of +15 VI, 15 VIII and +15 VIII for the three groups of reverse polarity Boost circuits of the driving board upper arm, the inverter power supply board provides one path of power supply of +15 VI for the three groups of reverse polarity Boost circuits of the driving board lower arm, each group of reverse polarity Boost adjusting circuits is connected to the IGBT driving equivalent circuit (as shown in figure 2 or figure 4), and each group of IGBT driving equivalent circuits controls an output level to be connected with a G pole of each IGBT so as to realize on-off control of a single IGBT, the inverter power panel provides +/-12V for an IGBT driving equivalent circuit, a +12V port of the inverter power panel is connected with any one C pole of an IGBT1, an IGBT3 and an IGBT5, and a-12V port of the inverter power panel is connected with any one E pole of an IGBT2, an IGBT4 and an IGBT 6;

and a display console, as shown in fig. 2, connected with the upper arm of the drive board of the intermediate connection unit through a serial port i, and connected with the lower arm of the drive board of the intermediate connection unit through a serial port ii, wherein the display console comprises a manual switching module circuit, an automatic switching module circuit and a conduction signal circuit, and is used for operating the manual bit trigger signal, the automatic bit trigger signal and displaying whether the IGBT normally works.

In the technical scheme, the manual switching module circuit comprises six point contact switches S1-S6, six yellow LED lamp beads LED 1-LED 6 and current-limiting resistors R1A-R6A, the high level of the manual switching module circuit is provided by an inverter power panel plus 5V power supply, each point contact switch is connected with one yellow LED lamp bead and one current-limiting resistor, the point contact switches are connected with the G pole of any one of the IGBTs 1-IGBT 6 after passing through a middle connection unit,

the concrete expression is as follows: the point contact switch S1 is connected in series with an LED lamp bead LED1 and a current-limiting resistor R1A and then connected with a G pole of an IGBT1, the point contact switch S2 is connected in series with an LED lamp bead LED2 and a current-limiting resistor R2A and then connected with a G pole of an IGBT2, the point contact switch S3 is connected in series with an LED lamp bead LED3 and a current-limiting resistor R3A and then connected with a G pole of an IGBT3, the point contact switch S4 is connected in series with an LED lamp bead LED4 and a current-limiting resistor R4A and then connected with a G pole of an IGBT4, the point contact switch S5 is connected in series with an LED lamp bead LED5 and a current-limiting resistor R5A and then connected with a G pole of an IGBT5, and the point contact switch S6 is connected in series with an LED lamp bead 6 and a current-limiting resistor R6A and then connected with a G pole of an IGBT6, as shown in figure 5.

In the technical scheme, the automatic switching module circuit comprises six I/O output ports of the single chip microcomputer, wherein the six I/O output ports are electrically connected with the input end of the reverse polarity Boost adjusting circuit and used for inverting after the six I/O output ports output low levels so as to amplify power to drive the IGBT driving equivalent circuit.

In the technical scheme, the energy supply input end of the manual switching module circuit and the energy supply input end of the automatic switching module circuit are electrically connected to the inverter power panel through the single-pole double-throw switch, and manual bit and automatic bit switching is achieved through the single-pole double-throw switch.

In this technical scheme, the turn-on signal circuit includes six white LED lamp pearls LED 7-LED 12, resistance R7A-R9A, and every two white LED lamp pearls connect the E utmost point or the C utmost point of two IGBT that link to each other in reverse parallel back one end access, and ground connection after the other end connects a resistance, and the concrete expression is:

white LED lamp bead LED7 and LED8 connect the E of IGBT1 or C of IGBT2 after the back reverse parallel, another end ground after connecting resistance R7A, white LED lamp bead LED9 and LED10 connect the E of IGBT3 or C of IGBT4 after the back reverse parallel, another end ground after connecting resistance R8A, white LED lamp bead LED11 and LED12 connect the E of IGBT5 or C of IGBT6 after the back reverse parallel, another end ground after connecting resistance R9A, as shown in figure 5.

As a further improvement of the technical scheme of the utility model, the manual switching module circuit is additionally provided with a mis-touch prevention TTL circuit. The mis-touch prevention TTL circuit selects 3 groups of same TTL circuits, each group of TTL circuits is formed by connecting 1 NOR gate U1A and 2 OR gates (OR gate U2A and OR gate U3A) in parallel, the input end of the NOR gate U1A of the TTL circuits is connected with the output ends of point touch switches S1-S6, the output end of the OR gate of the TTL circuits is connected with PWM 1-PWM 3 ports corresponding to the upper arm and the lower arm of the driving plate,

the concrete expression is as follows: input ends of three groups of NOR gates U1A are A1 and B2, A3 and B4, A5 and B6 respectively, output ends of the three groups of NOR gates are C1 and D2, C3 and D4, C5 and D6 respectively, output ends of the OR gates (OR gate U2A and OR gate U3A) C (C1/C3/C5) and D (D2/D4/D6) are connected with pull-up resistance enhanced output signals, and output ends of point contact switches S1, S3 and S5 are connected with A1, A3 and A5 respectively; the output ends of the point contact switches S2, S4 and S6 are respectively connected to B2, B4 and B6. The false touch prevention outputs C1, C3 and C5 are connected to corresponding PWM1, PWM2 and PWM3 in the serial port i of the upper arm of the drive board, the false touch prevention outputs D2, D4 and D6 are connected to corresponding PWM1, PWM2 and PWM3 (as shown in fig. 1, 4 and 6) in the serial port ii of the lower arm of the drive board, so as to ensure that the IGBTs in the same phase cannot be simultaneously conducted, as shown in table 1,

table 1: false touch prevention logic circuit truth table

As can be seen from the above table, the port connected to the upper arm or the lower arm of the drive board will respond only when one of the point contact switches of a1/A3/a5 or B2/B4/B6 of the same phase is activated, and the port connected to the upper arm or the lower arm of the drive board will not respond if both point contact switches of a1/A3/a5 and B2/B4/B6 of the same phase are activated simultaneously.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. Detection device based on passenger train inverter drive board and power strip, its characterized in that includes:

the power panel voltage detection unit is used for measuring whether the output voltage value of the inverter power panel of the intermediate connection unit meets the requirement or not;

the intermediate connection unit is used for providing a working environment for displaying that the operating platform meets the conditions, and comprises an inverter power board, a driving board upper arm and a driving board lower arm, wherein the driving board upper arm and the driving board lower arm are respectively composed of an IGBT driving equivalent circuit and a reverse polarity Boost adjusting circuit;

and the display operation platform is connected with the upper arm of the drive plate and the lower arm of the drive plate of the intermediate connection unit, comprises a manual switching module circuit, an automatic switching module circuit and a conducting signal circuit and is used for operating the manual bit trigger signal and the automatic bit trigger signal and displaying whether the IGBT normally works or not.

2. The detecting device based on the railway passenger car inverter driving board and the power board as claimed in claim 1, wherein: the manual switching module circuit comprises a plurality of point contact switches, LED lamp beads and current-limiting resistors, and each point contact switch is connected with the LED lamp beads and the current-limiting resistors and is connected with the G pole of any IGBT after passing through the middle connection unit.

3. The detecting device based on the railway passenger car inverter driving board and the power board as claimed in claim 1, wherein: the automatic switching module circuit comprises an I/O output port of the single chip microcomputer, the I/O output port is electrically connected with an input end of the reverse polarity Boost adjusting circuit and is used for inverting after the I/O output port outputs a low level to drive the IGBT driving equivalent circuit by amplifying power.

4. The detecting device based on the railway passenger car inverter driving board and the power board as claimed in claim 1, wherein: the manual switching module circuit and the automatic switching module circuit can be electrically connected to the inverter power panel through the switch and used for realizing manual bit and automatic bit switching through the single-pole double-throw switch.

5. The detecting device based on the railway passenger car inverter driving board and the power board as claimed in claim 1, wherein: the conducting signal circuit comprises a plurality of LED lamp beads and resistors, one end of each two connected lamp beads is connected into the E pole or the C pole of each two connected IGBTs after being connected in parallel in the reverse direction, and the other end of each two connected IGBT is connected with one resistor and then grounded.

6. The detecting device based on the railway passenger car inverter driving board and the power board as claimed in claim 1, wherein: and the manual switching module circuit is additionally provided with a mis-touch prevention TTL circuit, and 3 groups of same TTL circuits are selected as the mis-touch prevention TTL circuit.

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