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 Device Based on Railway Passenger Car Inverter Drive Board and Power Board

technical field

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

Background technique

Changqian non-traditional inverters (DC600V/AC380V, 35KVA, hereinafter referred to as inverters) have a large number of existing DC600V direct power supply type 25 passenger cars. Focus on 2006-2008. According to the China Railway Corporation passenger car electrical equipment maintenance rules, PCB boards should be replaced after about 12 years of use. Due to the large number of existing ones, the replacement of the under-vehicle power box assembly will be in accordance with the factory repair requirements. Therefore, there are still a large number of inverters in the existing passenger cars. In order to ensure that the power equipment under the bus can smoothly turn to the conventional equipment, the maintenance of the old non-standard equipment is still of great significance. According to the manual published by Changqian Company, the fault codes -4/-1F and -2F correspond to IGBT faults, but in reality, the fault codes include the possibility of failure of the drive circuit in the IGBT drive board. In the field maintenance work, the problem can be solved by replacing the upper and lower arm plates of the IGBT driver board. Therefore, accurate fault location of three groups of identical driving circuits in a driving board is particularly important for the maintenance of the PCB board.

SUMMARY OF THE INVENTION

The purpose of the utility model is to overcome the deficiencies of the prior art, and the utility model provides a detection device based on the inverter drive board and the power board of the railway passenger car to solve the above problems.

The technical scheme of the present utility model:

A detection device based on the inverter drive board and power board of a railway passenger car, including:

The power board voltage detection unit, including six digital display voltmeter heads, is used to measure whether the output voltage values of the six groups of the inverter power board of the intermediate connection unit meet the requirements, and determine whether the six groups of digital display voltmeter heads detect the power supply board The stability of the output voltage, so as to realize the power supply required for the detection of the upper arm of the driver board and the lower arm of the driver board;

The intermediate connection unit is used to provide a working environment that shows that the operating console meets the conditions. The intermediate connection unit includes the inverter power board, the drive board arm and the drive board lower arm, wherein the drive board arm and the drive board lower arm are respectively composed of three groups. It is composed of an independent IGBT drive equivalent circuit and a reverse polarity Boost adjustment circuit. The inverter power board supplies power to the reverse polarity Boost circuits of the upper arm and the lower arm of the drive board, and each group of reverse polarity Boost adjustment circuits is connected to IGBT drive equivalent circuit, each group of IGBT drive equivalent circuit controls the output level to connect the G pole of each IGBT to realize the on-off control of a single IGBT;

The display console is connected to the driver board arm of the intermediate connection unit through serial port I, and is connected to the lower arm of the driver board of the intermediate connection unit through serial port II. The display console includes a manual switching module circuit, an automatic switching module circuit and a conduction signal circuit. It is used to operate the manual bit trigger signal, the automatic bit trigger signal and display whether the IGBT is working normally.

The serial port I of the arm on the driver board and the 9-pin FAULT- of the serial port II of the lower arm of the driver board, after the serial port is connected to the display console, the serial port is connected to the red LED lamp bead, and the red LED lamp bead is electrically connected to the high voltage Between the flat and the pull-up resistor, it is used as a fault signal display; after the serial port communication is connected to the display console, the serial port I of the driver board arm and the serial port II of the lower arm of the driver board are connected to a touch switch S7, touch the The switch S7 is electrically connected between the high level and the current limiting resistor for reset reset.

In this technical solution, the manual switching module circuit includes a touch switch, LED lamp beads and a current limiting resistor, the high level of the manual switching module circuit is provided by the inverter power board, and each touch switch is connected to an LED light Beads and a current limiting resistor are connected to the G pole of any one of IGBT1 to IGBT6,

In this technical solution, the automatic switching module circuit includes an I/O output port of the single-chip microcomputer, and the I/O output port is electrically connected to the input end of the reverse polarity Boost adjustment circuit, and is used for the I/O output port to output a low level and then take the Inversely, the IGBT is driven by the amplified power to drive the equivalent circuit.

In this technical solution, the power supply input end of the manual switching module circuit and the power supply input end of the automatic switching module circuit are electrically connected to the inverter power board through a single-pole double-throw switch, and are used to realize manual position and Automatic bit switching.

In this technical solution, ±12V is used as a load power supply with a potential difference of 24V output by an analog external device, so as to test the working state of the weak current load on the drive board arm or the drive board lower arm. Due to the high-power characteristics of the selected model of IGBT, any DC power not greater than DC600V can be selected as the load power supply of the IGBT. The ±12V power supply is supplied to the bridge IGBT input terminal instead of the DC600V high voltage, which protects the safety of the operator.

In this technical solution, the selected voltage ±12V is used as the IGBT load voltage, the turn-on signal circuit includes white LED lamp beads and a resistor, and each two white LED lamp beads are connected in anti-parallel, and then one end is connected to the E of two connected IGBTs. Between the pole and the C pole, connect a resistor at the other end to ground.

As a further improvement of the technical solution of the present invention, the manual switching module circuit adds an anti-mistouch TTL circuit, that is, the IGBTs of the same phase cannot be turned on at the same time. The anti-mistouch TTL circuit selects 3 groups of the same TTL circuits, each group of TTL circuits is composed of one NOR gate U1A and two OR gates (U2A, U3A) in parallel, and the NOR gate U1A of the TTL circuit is input The terminal is connected to the output terminal of the touch switch, and the output terminal of the OR gate of the TTL circuit is connected to the PWM1-PWM3 ports corresponding to the arm on the driver board and the lower arm of the driver board,

The specific performance is: the input terminals of the three groups of NOR gate U1A are A1 and B2, A3 and B4, A5 and B6 respectively, the output terminals of the three groups of OR gates are C1 and D2, C3 and D4, C5 and D6 respectively, and the output terminals of the OR gate are respectively The C and D terminals are connected to pull-up resistors to enhance the output signal, and the output terminals of the touch switches S1, S3, and S5 are connected to A1, A3, and A5, respectively; the output terminals of the touch switches S2, S4, and S6 are connected to B2, B4, and B6, respectively. . The anti-mistouch outputs C1, C3 and C5 are connected to the corresponding PWM1, PWM2 and PWM3 in the arm serial port I on the driver board, and the anti-mistouch outputs D2, D4 and D6 are connected to the corresponding PWM1 and PWM2 in the lower arm serial port II of the driver board. , PWM3.

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

1. All voltage types output by the inverter power board are incorporated into the utility model device, which simulates the operating conditions of the inverter power board under normal working conditions to the greatest extent.

2 Due to the high on-off frequency of the double-tube IGBT, it is cumbersome to use a multi-range multimeter to measure the reverse change of the voltage between the C poles and the E poles of the 6 groups of IGBTs. The on-off condition of IGBT, and get rid of the pre-judgment of faults in the maintenance stage, and the steps of installing the original machine, powering on strong electricity and the danger of electric shock during the commissioning stage of maintenance, which greatly shortens the man-hours for fault judgment and maintenance and commissioning, and improves maintenance. Productivity.

3 In addition, since the utility model supplies power to the driving circuit and communication line in the driving board under normal working conditions, the device of the utility model can be used to carry out the stability and fatigue test of the driving board, so as to improve the stability and durability of the maintenance product.

Description of drawings

Figure 1 shows the logical connection between the equivalent circuit of the A316J driver and the serial port I, in which the logical connection of the serial port II and the equivalent circuit of the A316J driver is equivalent;

Fig. 2 is the electrical connection logic diagram of the utility model;

Figure 3 is a flow chart of the voltage system of the inverter power board;

Figure 4 is a schematic diagram of the working principle of the IGBT;

Figure 5 is the equivalent circuit of IGBT and manual bit trigger when ±12V power supply is the load;

Figure 6 is an anti-mistouch logic circuit;

Reference symbols: high-frequency drive optocoupler A316J, touch switches S1-S6, LED lamp beads LED1-LED12, current limiting resistors R1A-R6A, resistors R7A-R9A, NOR gate U1A, OR gate U2A, OR gate U3A.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

In this embodiment, the mains AC220V is connected to the power supply module and the output DC110V is used as the voltage input of the designed device, and the DC110V power supply is connected to the input terminal of the inverter power board (CP3U03), and the inverter power board (CP3U03) input It is a DC110V power supply, and the output is an independent 4-way +15V power supply, ±12V power supply and +5V power supply, of which ±12V and +5V share the ground, as shown in Figure 3.

A detection device based on the inverter drive board and power board of a railway passenger car, including:

The power board voltage detection unit is used to measure whether the output voltage values of the six groups of the inverter power board of the intermediate connection unit meet the requirements, including six digital display voltmeter heads, respectively measuring 4 groups of +15V power supply voltage and 1 group of ±12V Voltage, 1 group +5V voltage. Figure 3;

An intermediate connection unit, used to provide a working environment that shows that the console meets the conditions, the intermediate connection unit includes an inverter power board, an upper arm of the driving board and a lower arm of the driving board, wherein the upper arm of the driving board and the lower arm of the driving board are both CDXX16 Type, the upper arm of the driver board and the lower arm of the driver board are respectively composed of three groups of independent IGBT driving equivalent circuits (ie A316J driving equivalent circuits, equivalent circuits driven by A316J chips) and reverse polarity Boost adjustment circuits. The inverter power board provides +15VⅠ, 15VⅡ and +15VⅢ three-way power supply to drive the three sets of reverse polarity boost circuits on the arm on the board, and the inverter power board provides +15VⅣ one power supply to supply the three sets of reverse polarity on the lower arm of the drive board Boost circuit, each group of reverse polarity Boost adjustment circuit is connected to the IGBT driving equivalent circuit (as shown in Figure 2 or Figure 4), each group of IGBT driving equivalent circuit control output level is connected to the G pole of each IGBT to achieve For the on-off control of a single IGBT, the inverter power board provides ±12V to the IGBT drive equivalent circuit, and the +12V port of the inverter power board is connected to any one of the C poles of IGBT1, IGBT3, and IGBT5. The -12V port of the inverter power board is connected to any E pole of IGBT2, IGBT4 and IGBT6;

The display console, as shown in Figure 2, is connected with the driver board arm of the intermediate connection unit through serial port I, and is connected with the driver board lower arm of the intermediate connection unit through serial port II. The display console includes manual switching module circuits, automatic switching The module circuit and the conduction signal circuit are used to operate the manual bit trigger signal, the automatic bit trigger signal and to display whether the IGBT is working normally.

In this technical solution, the manual switching module circuit includes six touch switches S1-S6, six yellow LED lamp beads LED1-LED6 and current limiting resistors R1A-R6A, and the high level of the manual switching module circuit is controlled by the inverter The +5V power supply of the power supply board of the device is provided. Each touch switch is connected to a yellow LED lamp bead and a current limiting resistor connected to the G pole of any one of IGBT1 to IGBT6 through the intermediate connection unit.

The specific performance is as follows: the touch switch S1 is connected in series with the LED lamp bead LED1 and the current limiting resistor R1A and then connected to the G pole of the IGBT1; the touch switch S2 is connected in series with the LED lamp bead LED2 and the current limiting resistor R2A and then connected to the meter into the G pole of IGBT2, the touch switch S3 is connected in series with the LED lamp bead LED3 and the current limiting resistor R3A and then connected to the G pole of the IGBT3, and the touch switch S4 is connected in series with the LED lamp bead LED4 and the current limiting resistor R4A. Connected to the G pole of IGBT4, the touch switch S5 is connected in series with the LED lamp bead LED5 and the current limiting resistor R5A and then connected to the G pole of the IGBT5, the touch switch S6 is connected to the LED lamp bead LED6, and the current limiting resistor R6A After connecting in series, it is included in the G pole of IGBT6, as shown in Figure 5.

In this technical solution, the automatic switching module circuit includes six I/O output ports of the single-chip microcomputer, and six I/O output ports are electrically connected to the input end of the reverse polarity Boost adjustment circuit for the six I/O output ports. After outputting the low level, it is inverted to drive the IGBT to amplify the power to drive the equivalent circuit.

In this technical solution, the power supply input end of the manual switching module circuit and the power supply input end of the automatic switching module circuit are electrically connected to the inverter power board through a single-pole double-throw switch, and are used to realize manual position and Automatic bit switching.

In this technical solution, the turn-on signal circuit includes six white LED lamp beads LED7-LED12, resistors R7A-R9A, and each two white LED lamp beads are connected in anti-parallel, and then one end is connected to the E pole or C of the two connected IGBTs. pole, the other end is connected to a resistor and then grounded, the specific performance is as follows:

The white LED lamp bead LED7 and LED8 are connected in inverse parallel, and one end is connected to the E pole of IGBT1 or the C pole of IGBT2, and the other end is connected to the resistor R7A and then grounded. The white LED lamp bead LED9 and LED10 are connected in reverse parallel, and one end is connected to the E pole of IGBT3 Or the C pole of IGBT4, the other end is connected to the resistor R8A and then grounded, the white LED lamp bead LED11 and LED12 are connected in reverse parallel, and then one end is connected to the E pole of IGBT5 or the C pole of IGBT6, and the other end is connected to the resistor R9A and then grounded, as shown in Figure 5 Show.

As a further improvement of the technical solution of the present invention, the manual switching module circuit adds an anti-mistouch TTL circuit. The anti-mistouch TTL circuit selects 3 groups of identical TTL circuits, each group of TTL circuits is composed of one NOR gate U1A and two OR gates (OR gate U2A and OR gate U3A) in parallel. The input end of the NOT gate U1A is connected to the output ends of the touch switches S1 to S6, and the output end of the OR gate of the TTL circuit is connected to the PWM1 to PWM3 ports corresponding to the upper arm of the driver board and the lower arm of the driver board,

The specific performance is: the input terminals of the three groups of NOR gate U1A are A1 and B2, A3 and B4, A5 and B6 respectively, the output terminals of the three groups of OR gates are C1 and D2, C3 and D4, C5 and D6 respectively, and the output terminals of the OR gate are respectively (OR gate U2A and OR gate U3A) C (C1/C3/C5) and D (D2/D4/D6) terminals are connected to pull-up resistors to enhance the output signal, and the output terminals of touch switches S1, S3, and S5 are connected to A1 respectively , A3, A5; the output terminals of touch switch S2, S4, S6 are connected to B2, B4, B6 respectively. The anti-mistouch outputs C1, C3, and C5 are connected to the corresponding PWM1, PWM2, and PWM3 in the arm serial port I on the driver board, and the anti-mistouch outputs D2, D4, and D6 are connected to the corresponding PWM1, PWM2 in the lower arm serial port II of the driver board. , PWM3 (as shown in Figures 1, 4 and 6) to ensure that the IGBTs of the same phase cannot be turned on at the same time, as shown in Table 1,

Table 1: Truth table of anti-mistouch logic circuit

It can be seen from the above table that only when one of the touch switches of A1/A3/A5 or B2/B4/B6 of the same phase is activated, the port connected to the arm on the driver board or the lower arm of the driver board will respond. The two touch switches of A1/A3/A5 and B2/B4/B6 act at the same time, and the ports connected to the upper arm of the driver board or the lower arm of the driver board will not respond.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , substitutions and modifications, the protection scope of the present invention is defined by 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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