Subway vehicle auxiliary inverter main control board off-line testing device based on hardware design

Abstract

The utility model provides a subway vehicle auxiliary inverter main control board off-line test device based on hardware design. The subway vehicle auxiliary inverter main control board off-line test device comprises a test module and an upper computer. The upper computer is used for displaying test information of the vehicle auxiliary inverter main control board; the test module comprises a direct current signal simulation unit which is connected with the vehicle auxiliary inversion main control board and sends a direct current simulation signal to the vehicle auxiliary inversion main control board so as to drive the vehicle auxiliary inversion main control board to test; the alternating current signal simulation unit is connected with the vehicle auxiliary inversion main control board and sends an alternating current simulation signal to the vehicle auxiliary inversion main control board to test the vehicle auxiliary inversion main control board; and the digital input and output unit is connected with the vehicle auxiliary inversion main control board and is used for inputting the condition signal and testing the vehicle auxiliary inversion main control board to be tested, and the digital input and output unit is also used for outputting the state information of the vehicle auxiliary inversion main control board. According to the utility model, the off-line test of the auxiliary inversion main control board of the subway vehicle can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of the test of the auxiliary inverter main control board of subway vehicles, and particularly relates to an off-line test device for the auxiliary inverter main control board of subway vehicles based on hardware design. Background Art

[0002] The auxiliary inverter main control board of subway vehicles is mainly responsible for converting the line network voltage of 1500V into 380V AC and the 110V DC of the charger through controlling chopping inversion, which is equivalent to controlling all power supply modules except the traction motor. And each unit vehicle is equipped with an auxiliary inverter main control board.

[0003] Due to the increasing failure rate of the auxiliary inverter main control board year by year, the maintenance and test rely on the on-vehicle test. It takes at least half an hour to disassemble and assemble a board, and it is easy to cause other secondary failure risks of the board. There is great pressure on the available test time due to the vehicle supply pressure, and the fault point cannot be quickly located. Especially for the reliability test, it is impossible to start. Therefore, the existing technology still lacks an independent off-line test device for the auxiliary inverter main control board of subway vehicles. Summary of the Utility Model

[0004] In order to overcome the above technical defects, an off-line test device for the auxiliary inverter main control board of subway vehicles based on hardware design of the utility model can realize the off-line test of the auxiliary inverter main control board of subway vehicles.

[0005] This solution is realized through the following scheme:

[0006] An off-line test device for the auxiliary inverter main control board of subway vehicles based on hardware design, the auxiliary inverter main control board of subway vehicles is connected with a 12-way IGBT feedback circuit, including: a test module and a host computer;

[0007] The host computer is used for displaying the test information of the vehicle auxiliary inverter main control board to be tested;

[0008] The test module includes:

[0009] A DC signal simulation unit, connected with the vehicle auxiliary inverter main control board to be tested, and used for sending a DC analog signal to the vehicle auxiliary inverter main control board to be tested to drive the vehicle auxiliary inverter main control board to be tested for testing;

[0010] An AC signal simulation unit, connected with the vehicle auxiliary inverter main control board to be tested, and used for sending an AC analog signal to the vehicle auxiliary inverter main control board to be tested to drive the vehicle auxiliary inverter main control board to be tested for testing;

[0011] A digital input / output unit is connected to the vehicle auxiliary inverter main control board to be tested, and is used to input a conditional signal to the vehicle auxiliary inverter main control board to be tested, so as to test the vehicle auxiliary inverter main control board to be tested. At the same time, the digital input / output unit is also used to output the status information of the vehicle auxiliary inverter main control board to be tested.

[0012] As a further improvement of the present invention, the DC signal simulation unit includes: a first adjustable potential circuit, a voltage dividing circuit, a follower circuit, a charge and discharge simulation circuit, and an operational amplifier constant current source circuit;

[0013] The first adjustable potential circuit is connected to the input end of the voltage dividing circuit and the input end of the follower circuit;

[0014] The output end of the voltage dividing circuit and the output end of the follower circuit are connected to the input end of the operational amplifier constant current source circuit;

[0015] The input end of the charge and discharge simulation circuit is connected to the voltage dividing circuit and the follower circuit, and the output end is connected to the input end of the operational amplifier constant current source circuit;

[0016] The output end of the operational amplifier constant current source circuit outputs a DC analog signal to the vehicle auxiliary inverter main control board to be tested.

[0017] As a further improvement of the present invention, the DC signal simulation unit further includes: a first operational amplifier addition and subtraction adjustment circuit and a DC signal display circuit;

[0018] The DC analog signal is sequentially output to the first operational amplifier addition and subtraction adjustment circuit and the DC signal display circuit.

[0019] As a further improvement of the present invention, the AC signal simulation unit includes: a three-phase sine wave generation circuit, a second adjustable potential circuit, a bias voltage follower circuit, an operational amplifier subtraction circuit, an OTL amplification circuit, and a timer circuit;

[0020] The three-phase sine wave generation circuit is connected to the input end of the operational amplifier subtraction circuit;

[0021] The second adjustable resistor is connected to the input end of the bias voltage follower circuit;

[0022] The output end of the bias voltage follower circuit sequentially passes through the operational amplifier subtraction circuit, the OTL amplification circuit, and the timer circuit to output an AC analog signal to the vehicle auxiliary inverter main control board to be tested.

[0023] As a further improvement of the present invention, the AC signal simulation unit further includes: a second operational amplifier addition and subtraction circuit, a rectification and filtering circuit, and an AC signal display circuit;

[0024] The output terminal of the AC analog signal is sequentially connected to the second operational amplifier addition and subtraction circuit, the rectification and filtering circuit, and the AC signal display circuit.

[0025] As a further improvement of the present invention, the present invention further includes: a reference unit connected to the first adjustable potential circuit and the second adjustable potential circuit.

[0026] As a further improvement of the present invention, the reference unit includes: a reference voltage circuit and an operational amplifier follower;

[0027] The output terminal of the reference voltage circuit is connected to the input terminal of the operational amplifier follower;

[0028] The output terminal of the operational amplifier follower is connected to the first adjustable potential circuit and the second adjustable potential circuit.

[0029] As a further improvement of the present invention, the digital input and output unit includes: a digital input circuit and a digital input indication unit;

[0030] The digital input circuit is respectively connected to the digital input indication unit and the vehicle auxiliary inverter main control board to be tested.

[0031] As a further improvement of the present invention, the digital input and output unit further includes: a digital output circuit and a digital output indication unit;

[0032] The digital output circuit is respectively connected to the digital output indication unit and the vehicle auxiliary inverter main control board to be tested.

[0033] Compared with the prior art, the present invention has the following beneficial effects: The DC signal simulation unit, AC signal simulation unit, and digital input and output unit provided by the present invention are used to simulate the actual operating conditions on the line in the form of hardware, so as to perform offline testing on the vehicle auxiliary inverter main control board of the subway. At the same time, the digital input and output unit is used to output status information, and the host computer displays the test information. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following further details the specific embodiments of the present invention with reference to the drawings, where:

[0035] Figure 1 is the overall structural schematic diagram of the offline testing device for the vehicle auxiliary inverter main control board of the subway described in the present invention;

[0036] Figure 2 is the partial structural schematic diagram of the DC signal simulation unit described in the present invention;

[0037] Figure 3Partial structural schematic diagram of the DC signal simulation unit according to the present utility model;

[0038] Figure 4 Structural schematic diagram of the AC signal simulation unit according to the present utility model;

[0039] Figure 5 Partial structural schematic diagram of the digital input / output unit according to the present utility model;

[0040] Figure 6 Partial structural schematic diagram of the digital input / output unit according to the present utility model;

[0041] Figure 7 Structural schematic diagram of the reference unit according to the present utility model.

[0042] Marking description: 1. DC signal simulation unit; 101. First adjustable potential circuit; 102. Voltage division circuit; 103. Follower circuit; 104. Charge and discharge simulation circuit; 105. Operational amplifier constant current source circuit; 106. DC analog signal; 107. First operational amplifier addition and subtraction adjustment circuit; 108. DC signal display circuit; 2. AC signal simulation unit; 201. Three-phase sine wave generation circuit; 202. Second adjustable potential circuit; 203. Bias voltage follower circuit; 204. Operational amplifier subtraction circuit; 205. OTL amplifier circuit; 206. Timer circuit; 207. AC analog signal; 208. Second operational amplifier addition and subtraction circuit; 209. Rectification and filtering circuit; 210. AC signal display circuit; 3. Digital input / output unit; 31. Digital input circuit; 32. Digital input indication unit; 33. Digital output circuit; 34. Digital output indication unit; 4. Reference unit; 41. Reference voltage circuit; 42. Operational amplifier follower; 100. Vehicle auxiliary inverter main control board to be tested; 101. IGBT drive feedback circuit. Specific embodiments

[0043] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.

[0044] The utility model provides an off-line test device for the auxiliary inverter main control board of a subway vehicle based on hardware design. The auxiliary inverter main control board of the subway vehicle is connected with a 12-way IGBT feedback circuit. The auxiliary inverter main control of the subway vehicle realizes the purpose of inversion by driving IGBT chopping. Each PWM signal sent out is feedback by the IGBT drive feedback circuit 101 to prove that the drive is effective, including: a test module and a host computer; the host computer is used to display the test information of the vehicle auxiliary inverter main control board 100 to be tested; the test module includes: a DC signal simulation unit 1, an AC signal simulation unit 2, and a digital input / output unit 3; wherein, the DC signal simulation unit 1 is connected with the vehicle auxiliary inverter main control board 100 to be tested, and is used to send a DC analog signal 106 to the vehicle auxiliary inverter main control board to be tested to drive the vehicle auxiliary inverter main control board to be tested for testing; the AC signal simulation unit 2 is connected with the vehicle auxiliary inverter main control board 100 to be tested, and is used to send an AC analog signal 207 to the vehicle auxiliary inverter main control board to be tested to drive the vehicle auxiliary inverter main control board to be tested for testing; the digital input / output unit 3 is connected with the vehicle auxiliary inverter main control board 100 to be tested, and is used to input the required input condition signals to the vehicle auxiliary inverter main control board to be tested when the vehicle auxiliary inverter main control board to be tested is running, so as to test the vehicle auxiliary inverter main control board 100 to be tested. At the same time, the digital input / output unit 3 is also used to output the status information processed by the vehicle auxiliary inverter main control board 100 to be tested.

[0045] As Figure 2 and Figure 3 shown, the DC signal simulation unit 1 includes: a first adjustable potential circuit 101, a voltage dividing circuit 102, a follower circuit 103, a charge and discharge simulation circuit 104, and an operational amplifier constant current source circuit 105; the first adjustable potential circuit 101 is connected to the input end of the voltage dividing circuit 102 and the input end of the follower circuit 103; the output end of the voltage dividing circuit 102 and the output end of the follower circuit 103 are connected to the input end of the operational amplifier constant current source circuit 105; the input end of the charge and discharge simulation circuit 104 is connected to the voltage dividing circuit 102 and the follower circuit 103, and the output end is connected to the input end of the operational amplifier constant current source circuit 105; the output end of the operational amplifier constant current source circuit 105 outputs a DC analog signal 106 and is connected to the vehicle auxiliary inverter main control board 100 to be tested.

[0046] The combination of the first adjustable potential circuit 101 and the voltage division circuit 102 can adjust the range of the input analog signal. The follower circuit 103 uses the characteristics of the input and output impedance of the operational amplifier to make the analog voltage division signal unaffected by the subsequent stage, playing a role in signal transmission isolation. The charge and discharge analog circuit 104 is used to simulate the situation that the main contactor can be normally closed only when there is a capacitor pre-charging circuit under the high-voltage environment of the train. Selecting appropriate resistors and capacitors can simulate the charge and discharge time of the capacitor in the normal vehicle auxiliary system and the curve of the corresponding voltage, so that the vehicle auxiliary inverter main control board thinks that the charging process is normal and there will be no situation of being too fast or too slow. For the operational amplifier constant current source circuit 105, the normal input board of the vehicle auxiliary inverter main control board is a current of 0 - 20 mA, and the front-end circuits of the operational amplifier constant current source circuit 105 are all voltage signals, so the operational amplifier constant current source circuit 105 is used as a voltage-current conversion circuit.

[0047] The charge and discharge analog circuit 104 is used to simulate the high-voltage pre-charging circuit of the train. By adjusting the RC charge and discharge analog circuit 104, the charge and discharge time and curve simulation can be realized. In addition, through the voltage division circuit 102 and the follower circuit 103, the full voltage and half voltage simulation can be realized, so as to meet the full voltage and half voltage requirements of the auxiliary inverter system. The full voltage and half voltage both correspond to the voltage sensors of the auxiliary system on the vehicle. Because the vehicle auxiliary inverter divides 1500V into two groups when working, and two sensors are used to achieve the voltage equalization of the upper and lower groups, which are the 1500V full voltage and the 750V half voltage respectively. These two voltage sensors both correspond to the corresponding capacitors, so the charging process is required to judge whether it is normal. When designing the charge and discharge analog circuit 104, the RC value is set and adjusted according to the simulated vehicle charge and discharge curve.

[0048] The DC signal simulation unit 1 further includes: a first operational amplifier addition and subtraction adjustment circuit 107 and a DC signal display circuit 108; the DC analog signal 106 is sequentially input to the first operational amplifier addition and subtraction adjustment circuit 107 and the DC signal display circuit 108. The first operational amplifier addition and subtraction circuit is used to adjust the magnitude of the analog signal value for convenient signal display. The DC signal display circuit 108 is used to display the adjusted analog signal value in the form of an indicator light and a digital display meter.

[0049] Such as Figure 4As shown in the figure, the AC signal simulation unit 2 includes: a three-phase sine wave generation circuit 201, a second adjustable potential circuit 202, a bias voltage follower circuit 203, an operational amplifier subtraction circuit 204, an OTL amplifier circuit 205, a timer circuit 206, and the charge and discharge simulation circuit 104 is an RC charge and discharge simulation circuit 104; the three-phase sine wave generation circuit 201 is connected to the input end of the operational amplifier subtraction circuit 204; the second adjustable resistor is connected to the input end of the bias voltage follower circuit 203; the output end of the bias voltage follower circuit 203 sequentially passes through the operational amplifier subtraction circuit 204, the OTL amplifier circuit 205, and the timer circuit 206 to output an AC analog signal 207, which is connected to the vehicle auxiliary inverter main control board 100 to be tested.

[0050] The three-phase sine wave generation circuit 201 generates an analog signal of 50Hz three-phase AC UVW. This circuit only has the positive half cycle and is responsible for generating the waveform size and frequency. The second adjustable potential circuit 202 and the bias voltage follower circuit 203 are used as the offset of the operational amplifier subtraction input. Combined with the operational amplifier subtraction circuit 204, the voltage amplitude of the three-phase sine wave with only the positive half cycle is shifted to a three-phase waveform with the same size in both the positive and negative half cycles. The second adjustable potential circuit 202 adjusts the up and down offset of the output waveform voltage. The output signal obtains the signal range required by the actual auxiliary inverter through the OTL amplifier circuit. The timing processing circuit switches the magnitude of the output signal current, and finally obtains a complete AC analog signal 207.

[0051] The AC signal simulation unit 2 further includes: a second operational amplifier addition and subtraction circuit 208, a rectifier and filter circuit 209, and an AC signal display circuit 210; the AC analog signal 207 is sequentially output to the second operational amplifier addition and subtraction circuit 208, the rectifier and filter circuit 209, and the AC signal display circuit 210. The second operational amplifier addition and subtraction circuit 208 is used to adjust the magnitude of the analog signal value for signal display. The rectifier and filter circuit 209 is used to convert AC to DC and filter out the clutter for signal display. The AC signal display circuit 210 is used to display the adjusted analog signal value in the form of indicator lights and digital display meters.

[0052] As Figure 5 and Figure 6 shown in the figure, the digital input and output unit 3 includes: a digital input circuit 31 and a digital input indication unit 32; the digital input circuit 31 is respectively connected to the digital input indication unit 32 and the vehicle auxiliary inverter main control board 100 to be tested.

[0053] The digital input and output unit 3 further includes: a digital output circuit 33 and a digital output indication unit 34; the digital output circuit 33 is respectively connected to the digital output indication unit 34 and the vehicle auxiliary inverter main control board 100 to be tested.

[0054] The digital output circuit 33 is a circuit corresponding to the output processing of the vehicle auxiliary inverter main control board to be tested. After the vehicle auxiliary inverter main control board to be tested outputs, there will be corresponding inputs as feedback, and the working conditions of relevant analog signals also accompany. The circuit corresponding to the signal output by the vehicle auxiliary inverter main control board to be tested is attached with relevant indicator lights, and combined with digital input and analog input to form actions and feedback corresponding to the information input and output of the main control board.

[0055] For example, the fan start contactor Q4A receives the 24V feedback of the 11 contact of the output contactor Q5B input through the vehicle auxiliary inverter main control board to be tested. At the same time, under the condition that the three-phase AC output voltage and three-phase AC output current signals simulated by the contactor Q5B do not exceed the limit and the working temperature or the simulated module temperature of the vehicle auxiliary inverter main control board to be tested reaches 40°C, a signal to close the fan start contactor will be sent through the vehicle auxiliary inverter main control board to be tested. At this time, since the detection of the vehicle auxiliary inverter main control board to be tested has a delay protection, the triode Q6 is started through the contacts 3 and 2 of the fan start contactor Q4B to charge and discharge through RC and delay conduction to start the fan M2 and display the fan start state information on the indicator light LED14. At the same time, the state of closing the fan contactor Q4 of the fan start contactor is fed back to the auxiliary inverter main control board through the 10 and 11 contacts of the fan start contactor Q4B, and the internal contacts of the fan M2 also feed back signals to the auxiliary inverter control board.

[0056] As Figure 7 shown, the present invention further includes: a reference unit 4 connected to the first adjustable potential circuit 101 and the second adjustable potential circuit 202 for providing a reference voltage.

[0057] The reference unit 4 includes: a reference voltage circuit 41 and an operational amplifier follower 42; the output end of the reference voltage circuit is connected to the input end of the operational amplifier follower; the output end of the operational amplifier follower is connected to the first adjustable potential circuit 101 and the second adjustable potential circuit 202.

[0058] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An off-line test device for the auxiliary inverter main control board of a subway vehicle based on hardware design, wherein the auxiliary inverter main control board of the subway vehicle is connected with a 12-way IGBT feedback circuit, and is characterized in that, Including: A test module and a host computer; The host computer is used to display the test information of the vehicle auxiliary inverter main control board to be tested; The test module includes: A DC signal simulation unit, connected to the vehicle auxiliary inverter main control board to be tested, for sending a DC analog signal to the vehicle auxiliary inverter main control board to be tested to drive the vehicle auxiliary inverter main control board to be tested for testing; An AC signal simulation unit, connected to the vehicle auxiliary inverter main control board to be tested, for sending an AC analog signal to the vehicle auxiliary inverter main control board to be tested to drive the vehicle auxiliary inverter main control board to be tested for testing; A digital input / output unit, connected to the vehicle auxiliary inverter main control board to be tested, for inputting a condition signal to the vehicle auxiliary inverter main control board to be tested to test the vehicle auxiliary inverter main control board to be tested. At the same time, the digital input / output unit is also used to output the status information of the vehicle auxiliary inverter main control board to be tested.

2. The off-line test device for the auxiliary inverter main control board of a subway vehicle based on hardware design according to claim 1, characterized in that The DC signal simulation unit includes: a first adjustable potential circuit, a voltage dividing circuit, a follower circuit, a charge and discharge simulation circuit, and an operational amplifier constant current source circuit; The first adjustable potential circuit is connected to the input end of the voltage dividing circuit and the input end of the follower circuit; The output end of the voltage dividing circuit and the output end of the follower circuit are connected to the input end of the operational amplifier constant current source circuit; The input end of the charge and discharge simulation circuit is connected to the voltage dividing circuit and the follower circuit, and the output end is connected to the input end of the operational amplifier constant current source circuit; The output end of the operational amplifier constant current source circuit outputs a DC analog signal to the vehicle auxiliary inverter main control board to be tested.

3. The off-line test device for the auxiliary inverter main control board of the subway vehicle based on hardware design according to claim 2, characterized in that, The DC signal simulation unit further includes: a first operational amplifier addition and subtraction adjustment circuit and a DC signal display circuit; The DC analog signal is sequentially output to the first operational amplifier addition and subtraction adjustment circuit and the DC signal display circuit.

4. The off-line test device for the auxiliary inverter main control board of a subway vehicle based on hardware design according to claim 2, wherein The AC signal simulation unit includes: a three-phase sine wave generation circuit, a second adjustable potential circuit, a bias voltage follower circuit, an operational amplifier subtraction circuit, an OTL amplifier circuit, and a timer circuit; The three-phase sine wave generation circuit is connected to the input end of the operational amplifier subtraction circuit; The second adjustable resistor is connected to the input end of the bias voltage follower circuit; The output end of the bias voltage follower circuit sequentially passes through the operational amplifier subtraction circuit, the OTL amplifier circuit, and the timer circuit to output an AC analog signal to the vehicle auxiliary inverter main control board to be tested.

5. The off-line test device for the auxiliary inverter main control board of the subway vehicle based on hardware design according to claim 4, characterized in that The AC signal simulation unit further includes: a second operational amplifier addition and subtraction circuit, a rectifier filter circuit, and an AC signal display circuit; The output end of the AC analog signal is sequentially connected to the second operational amplifier addition and subtraction circuit, the rectifier filter circuit, and the AC signal display circuit.

6. The off-line test device for the auxiliary inverter main control board of the subway vehicle based on hardware design according to claim 4, wherein It further includes: A reference unit connected to the first adjustable potential circuit and the second adjustable potential circuit.

7. The off-line test device for the auxiliary inverter main control board of a subway vehicle based on hardware design according to claim 6, characterized in that, The reference unit includes: a reference voltage circuit and an operational amplifier follower; The output end of the reference voltage circuit is connected to the input end of the operational amplifier follower; The output end of the operational amplifier follower is connected to the first adjustable potential circuit and the second adjustable potential circuit.

8. The off-line test device for the auxiliary inverter main control board of a subway vehicle based on hardware design according to claim 1, characterized in that, The digital input / output unit includes: a digital input circuit and a digital input indication unit; The digital input circuit is respectively connected to the digital input indication unit and the vehicle auxiliary inverter main control board to be tested.

9. The offline test device for the auxiliary inverter main control board of a subway vehicle based on hardware design according to claim 8, characterized in that, The digital input / output unit further includes: a digital output circuit and a digital output indication unit; The digital output circuit is respectively connected to the digital output indication unit and the vehicle auxiliary inverter main control board to be tested.

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