Train traction controller testing device

Abstract

The utility model provides a testing device of a train traction controller. The testing device can simulate various signal interfaces such as 14-path digital output, 26-path digital input, 4-path train speed signal, 6-path analog signal input, IGBT feedback signal and the like. The test device accurately simulates the working environment of the traction controller through the square wave signal output circuit, the first voltage conversion circuit, the second voltage conversion circuit and other modules, and realizes comprehensive detection of the controller. The method specifically comprises the steps that train speed signals are simulated through a PWM controller, stable voltage signals are provided through a voltage stabilizer, analog input signals are adjusted through a switch and a resistor, and it is ensured that various input and output signals of a traction controller can be accurately responded. According to the device, various functions of the traction controller are verified by simulating input signals under different working conditions, the mode of relying on field loading in the traditional testing process is avoided, and the testing time and cost are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to train traction box testing technical field, concretely relates to a test device of train traction controller. BACKGROUND

[0002] Train traction controller is the core control equipment in electric traction system, is responsible for adjusting the output of electric traction inverter, thereby realizes the speed and traction force control of train. Traction controller receives speed signal, relay output signal and other analog signals to accurately control the power system of train, ensures that train runs safely and stably. However, since traction controller itself involves multiple complex electronic control modules, its fault diagnosis and maintenance have been a difficult problem in electric locomotive maintenance.

[0003] At present, the fault detection and maintenance of traction controller usually rely on on-site test after loading and empirical judgment. Specifically, maintenance personnel need to load traction controller and connect it to train system, and use the running state of train itself to judge whether the performance of traction controller is normal. Such on-site test method has the following obvious shortcomings:

[0004] Unstable test environment: on-site test usually relies on the running state of train to judge whether the controller works normally, and the interference factors (such as train load change, unstable running speed, etc.) in test environment will affect the accuracy and reliability of test results.

[0005] Long test cycle and high cost: after each maintenance of traction controller, the board card needs to be loaded and tested on site, which has a long test cycle and cannot find faults immediately, resulting in low efficiency of maintenance process. At the same time, each on-site test involves a large amount of time, labor and material investment, increasing the maintenance cost.

[0006] Difficult fault positioning: when traction controller fails, maintenance personnel can only locate the problem by repeated on-site test and disassembly inspection. Since the structure of traction controller is complex, the specific position of internal fault is often difficult to confirm quickly, and the maintenance process lacks efficient fault diagnosis means.

[0007] It is difficult to guarantee the quality of maintenance: since on-site test does not have comprehensive and systematic function detection capability, the quality of maintenance of traction controller cannot be completely guaranteed. Maintenance personnel cannot check whether all functions of the board card are restored to normal during the maintenance process, and must rely on multiple loading tests for verification. This not only increases the test time, but also leads to potential problems in the board card after maintenance, which cannot completely ensure the safety of train in actual operation.

[0008] Lack of dedicated test platform: Currently, there is no complete test platform for traction controller on the market, and the devices that can simulate various input and output signals of the traction controller are relatively scarce. Although some manufacturers may provide partial function test equipment, these devices can usually only cover part of the function of the traction controller, and cannot comprehensively simulate the test. Therefore, the existing test equipment cannot meet the demand of complex function of traction controller.

[0009] In view of the above problems, a special traction controller test device is urgently needed to comprehensively and systematically test the function of the traction controller by simulating various input and output signals during the maintenance of the traction controller. This can not only greatly improve the maintenance efficiency and shorten the maintenance cycle, but also improve the maintenance quality, reduce the dependence on on-site testing, and ensure that the traction controller can work stably and reliably after maintenance. Practical new type content

[0010] The purpose of the present application is to overcome the defects of the prior art and provide a test device for a train traction controller.

[0011] The purpose of the present application can be achieved by the following technical solutions:

[0012] The test device for the train traction controller provided by the present application comprises a square wave signal output circuit, a first voltage conversion circuit and a second voltage conversion circuit.

[0013] The input end of the first voltage conversion circuit is connected with a VCC 24V power supply, and the output end is connected with the square wave signal output circuit and the second voltage conversion circuit respectively.

[0014] The output end of the second voltage conversion circuit is connected with each analog signal interface of the fourth port respectively.

[0015] The output end of the square wave signal output circuit is connected with the speed sensor interface of the fourth port respectively.

[0016] Further, the first voltage conversion circuit comprises a first power supply, a second power supply, a third power supply and a first voltage stabilizer.

[0017] The pin 1 of the first voltage stabilizer is connected with the VCC 24V power supply and the positive pole of the first power supply respectively.

[0018] The pin 2 of the first voltage stabilizer is connected with the negative pole of the first power supply, the negative pole of the second power supply and the negative pole of the third power supply respectively.

[0019] The pin 2 of the first voltage stabilizer, the negative pole of the first power supply, the negative pole of the second power supply and the negative pole of the third power supply are grounded.

[0020] The first voltage stabilizer 3 pins are connected with the second power supply positive pole and the third power supply positive pole respectively.

[0021] Further, the second voltage conversion circuit comprises a second voltage stabilizer, a fourth power supply, a fifth power supply, a first resistor and a second adjusting resistor.

[0022] Further, the second voltage stabilizer is an LM2991S chip.

[0023] Further, the second voltage stabilizer 3 pins are connected with the fourth power supply positive pole and the first voltage stabilizer 3 pin respectively.

[0024] The second voltage stabilizer 2 pin is connected with the fourth power supply negative pole.

[0025] The second voltage stabilizer 1 pin is connected with the first resistor and the second adjusting resistor respectively.

[0026] The fourth power supply negative pole, the second voltage stabilizer 2 pin, the 4 pin and the fifth power supply negative pole are grounded.

[0027] The second voltage stabilizer 5 pin is connected with the first resistor and the fifth power supply positive pole respectively.

[0028] Further, the square wave signal output circuit comprises a PWM controller, a third adjusting resistor, a fourth adjusting resistor, a fifth resistor, a sixth resistor, a first capacitor, an N-channel MOS tube and a sixth power supply.

[0029] Further, the PWM controller is an UC3842 chip.

[0030] Further, the PWM controller 1 pin is connected with the fourth adjusting resistor, the PWM controller 2 pin, the 3 pin and the 5 pin are grounded, the PWM controller 4 pin is connected with the first capacitor and the third adjusting resistor respectively, the PWM controller 6 pin is connected with the fifth resistor and the gate of the N-channel MOS tube on one hand and is grounded through the series connection of the fifth resistor and the sixth resistor on the other hand, and the 7 pin is connected with the first voltage stabilizer 3 pin, the sixth power supply positive pole and the drain of the N-channel MOS tube respectively.

[0031] Further, the source of the N-channel MOS tube is connected with the 10a pin, the 12a pin, the 10b pin and the 12b pin of the fourth port through a single-throw double-pole switch respectively.

[0032] Compared with the prior art, the utility model has the advantages of:

[0033] (1) The utility model discloses a square wave signal output circuit and two-stage voltage conversion circuit, can simulate the multiple signals required by traction controller, including digital input, analog input, speed signal etc. These analog signals can cover 14 way digital output of traction controller, 26 way digital input, 4 way train speed signal, 6 way analog input (voltage, current) etc. Multiple important interfaces, ensure that the test equipment can carry out comprehensive test to various functions of traction controller. Through this way, the testing device can provide accurate analog signal, so that traction controller can get sufficient function verification in the maintenance process, greatly improve the maintenance efficiency and accuracy.

[0034] (2) The utility model discloses the voltage stabilizer in first voltage conversion circuit and second voltage conversion circuit, ensure the stable output of each voltage signal in the test process. At the same time, through the fine adjustment of resistance to voltage, to adapt to the requirement of different signal interface. This accurate voltage control ensures the authenticity and reliability of test signal. The stability and adjustability of voltage signal avoid the test error caused by voltage instability, make the test result of traction controller more accurate and reliable, reduce the misjudgment risk caused by voltage fluctuation in the test process.

[0035] (3) The utility model uses PWM controller (such as UC3842 chip) to generate square wave signal, simulates the speed input signal of traction controller. The accurate control of PWM signal can simulate the different running state of train, so as to test the response of traction controller under different speed. This analog speed signal can detect the performance of traction controller under different speed conditions comprehensively, ensure that the controller after maintenance can work normally in actual use, improve the function verification efficiency after maintenance.

[0036] (4) The utility model combines N channel MOS tube and single pole double throw switch, can flexibly switch different analog signal state, accurately simulates the input output interface of traction controller. Especially the test of analog relay output, speed sensor input etc. Complex signal interface can be efficiently and accurately completed through this way. This flexible switching mechanism makes the testing device can simulate all possible working conditions of traction controller, provides multi-dimensional function verification for maintenance personnel, avoids missing some key test links, improves the comprehensiveness and precision of maintenance process.

[0037] (5)The utility model discloses a test platform that integrates multiple test functions, which allows maintenance personnel to directly test the traction controller through the test platform during maintenance, without the need to repeatedly load the controller for on-site verification. This design greatly shortens the maintenance cycle, reduces the time and labor costs caused by repeated loading and testing, and ensures accurate functional detection of the repaired board, thereby avoiding the risk of repair failure and improving work efficiency.

[0038] (6)The test device provided by the utility model can verify whether the traction controller board is completely restored to normal function after maintenance, ensuring stable operation on the train and avoiding faults or train damage caused by incomplete maintenance. Through full-function verification of the test platform, details that may be missed during maintenance can be effectively avoided, subsequent maintenance and train downtime caused by board failure are reduced, thereby greatly reducing maintenance costs and improving the reliability of the traction controller. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is traction controller test schematic diagram of the utility model;

[0040] Figure 2 It is traction controller first port circuit diagram of the utility model;

[0041] Figure 3 It is traction controller second port circuit diagram of the utility model;

[0042] Figure 4 It is traction controller third port circuit diagram of the utility model;

[0043] Figure 5 It is traction controller fourth port circuit diagram of the utility model;

[0044] Figure 6 It is digital input interface test circuit diagram of the utility model;

[0045] Figure 7 It is IGBT feedback test circuit diagram of the utility model;

[0046] Figure 8 It is analog signal interface test circuit diagram of the utility model;

[0047] Figure 9 It is square wave signal output circuit diagram of the utility model;

[0048] Figure 10 It is speed processor interface test circuit diagram of the utility model;

[0049] Figure 11 It is relay interface test circuit diagram of the utility model;

[0050] Figure 12 It is the first voltage conversion circuit diagram of the utility model;

[0051] Figure 13 It is the second voltage conversion circuit diagram of the utility model;

[0052] In the drawing, the reference signs are: PCE / J1C, traction controller first port, PCE / J2C, traction controller second port, PCE / J3C, traction controller third port, PCE / J4C, traction controller fourth port, U1, PWM controller, Q1, N-channel MOS tube, V1, first voltage regulator, V2, second voltage regulator, R1, first resistance, R2, second regulating resistance, R3, third regulating resistance, R4, fourth regulating resistance, R5, fifth resistance, R6, sixth resistance, C1, first capacitor, E1, first power supply, E2, second power supply, E3, third power supply, E4, fourth power supply, E5, fifth power supply, E6, sixth power supply. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the utility model.

[0054] The embodiment provides a kind of testing device of train traction controller, and traction controller includes first port, second port, third port, fourth port, testing device includes square wave signal output circuit, first voltage conversion circuit, second voltage conversion circuit;

[0055] First voltage conversion circuit input end is connected with VCC24V power supply, and output end is connected with square wave signal output circuit, second voltage conversion circuit respectively;

[0056] Second voltage conversion circuit output end is connected with each analog signal interface of fourth port respectively;

[0057] Square wave signal output circuit output end is connected with the speed sensor interface of fourth port respectively.

[0058] As Figure 12 As shown in the first voltage conversion circuit, it includes first power supply, second power supply, third power supply, first voltage regulator.

[0059] First voltage regulator 1 pin is connected with VCC24V power supply, first power supply anode respectively;

[0060] The first voltage stabilizer 2 pin is connected with the first power negative pole, the second power negative pole and the third power negative pole respectively.

[0061] The first voltage stabilizer 2 pin, the first power negative pole, the second power negative pole and the third power negative pole are grounded.

[0062] The first voltage stabilizer 3 pin is connected with the second power positive pole and the third power positive pole respectively.

[0063] As shown in Figure 13 The second voltage conversion circuit comprises a second voltage stabilizer, a fourth power supply, a fifth power supply, a first resistor and a second adjusting resistor.

[0064] The second voltage stabilizer is an LM2991S chip.

[0065] The second voltage stabilizer 3 pin is connected with the fourth power positive pole and the first voltage stabilizer 3 pin respectively.

[0066] The second voltage stabilizer 2 pin is connected with the fourth power negative pole.

[0067] The second voltage stabilizer 1 pin is connected with the first resistor and the second adjusting resistor respectively.

[0068] The fourth power negative pole, the second voltage stabilizer 2 pin, the 4 pin and the fifth power negative pole are grounded.

[0069] The second voltage stabilizer 5 pin is connected with the first resistor and the fifth power positive pole respectively.

[0070] The square wave signal output circuit comprises a PWM controller, a third adjusting resistor, a fourth adjusting resistor, a fifth resistor, a sixth resistor, a first capacitor, an N-channel MOS tube and a sixth power supply.

[0071] The PWM controller is an UC3842 chip.

[0072] The PWM controller 1 pin is connected with the fourth adjusting resistor, the PWM controller 2 pin, 3 pin and 5 pin are grounded, the PWM controller 4 pin is connected with the first capacitor and the third adjusting resistor respectively, the PWM controller 6 pin is connected with the fifth resistor and the gate of the N-channel MOS tube on one hand and grounded through the series connection of the fifth resistor and the sixth resistor on the other hand, and the 7 pin is connected with the first voltage stabilizer 3 pin, the sixth power positive pole and the drain of the N-channel MOS tube respectively.

[0073] The source of the N-channel MOS tube is connected with the 10a pin, the 12a pin, the 10b pin and the 12b pin of the fourth port through the single-pole double-throw switch respectively.

[0074] The utility model provides a kind of testing device of traction controller, can simulate the various types of input and output signals of traction controller comprehensively, ensure that its each function is effectively tested in maintenance process, ensure that the traction controller after repair can work normally. The embodiment and working principle of the utility model are described in detail below in conjunction with the drawings.

[0075] As Figure 1 Shown, testing device is composed of multiple circuit modules, including square wave signal output circuit, first voltage conversion circuit, second voltage conversion circuit, digital input interface test circuit, IGBT feedback test circuit, analog signal interface test circuit etc.Each module is connected by multiple ports of traction controller, realizes the simulation and detection of the various types of input and output signals of traction controller.Testing device can simulate the 14-way digital output of traction controller, 26-way digital input, 4-way train speed signal, 6-way analog signal input and IGBT feedback signal and multiple interfaces, fully test the function of controller.

[0076] As Figure 3 Shown, the second port PCE / J2C of traction controller is mainly used to receive digital input signal.Testing device inputs analog digital signal to the second port by the digital input interface test circuit as Figure 6 Shown, simulates the change of on-off signal to detect the reaction of traction controller when receiving different digital input signals.Digital input interface test circuit includes diode, relay switch, diode negative pole is connected with relay switch 2 pin and first voltage conversion circuit output respectively, diode positive pole is grounded with relay switch 1 pin, relay switch 3 pin is connected with VCC 110V power supply, and relay switch 4 pin is connected with each digital input interface L- of second port respectively, through digital input interface test circuit, testing device can simulate on-off signal in actual working environment, ensure that the digital input port of traction controller can respond accurately.

[0077] As Figure 5 Shown, the fourth port PCE / J4C of traction controller is mainly used to receive analog signal input and train speed signal, and testing device tests the analog signal input interface A- of fourth port PCE / J4C by analog signal interface test circuit as Figure 8 Shown, analog signal interface test circuit includes multiple single-pole double-throw switches, and the output voltage of second voltage conversion circuit is input to the analog signal input interface A- of fourth port PCE / J4C through single-pole double-throw switch for testing.

[0078] The PSP interface of the fourth port PCE / J4C of traction controller is speed sensor interface, for receiving train speed signal.In the testing device of the utility model, the analog signal input interface A- of fourth port PCE / J4C is tested by analog signal interface test circuit as Figure 9Figure 10 The circuit shown tests the speed sensor interface, the square wave signal output circuit generates square wave signals of different frequencies and duty cycles, simulates the speed change of the train, and transmits it to the third port of the traction controller. The frequency and duty cycle of the square wave signal are adjusted by the PWM controller (such as U1), by adjusting the parameters of the PWM controller, the test device can simulate the working state of the train at different speeds, and ensure that the traction controller can correctly respond to the speed signal.

[0079] As shown in Figure 2 The first port PCE / J1C of the traction controller is used to receive relay output and IGBT feedback signals. The test device tests the IGBT feedback interface through the IGBT feedback test circuit as shown in Figure 7

[0080] As shown in Figure 4 The third port PCE / J3C of the traction controller is used to output relay signals, and the test device tests whether the third port PCE / J3C of the traction controller outputs signals through the relay interface test circuit as shown in Figure 11

[0081] Through the cooperative work of each circuit module described above, the test device can simulate various working states of the traction controller and comprehensively verify its functions. Test personnel can quickly check whether the input and output signals of the traction controller are normal through the test device, thereby effectively diagnosing the faults of the controller and avoiding potential problems caused by incomplete detection in the traditional on-board test process. By using the test device of the utility model, the detection efficiency in the maintenance process is greatly improved, and at the same time, it is ensured that the repaired traction controller can work stably, and the probability of failure is reduced.

[0082] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the technical field can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.​​

Claims

1. A testing device for a train traction controller, the traction controller comprising a first port, a second port, a third port, and a fourth port, characterized in that, The testing device includes a square wave signal output circuit, a first voltage conversion circuit, and a second voltage conversion circuit. The input terminal of the first voltage conversion circuit is connected to a VCC24V power supply, and the output terminal is connected to a square wave signal output circuit and a second voltage conversion circuit, respectively. The output of the second voltage conversion circuit is connected to each analog signal interface of the fourth port; The output terminals of the square wave signal output circuit are connected to the speed sensor interface of the fourth port.

2. A test apparatus for a train traction controller as claimed in claim 1, characterised in that, The first voltage conversion circuit includes a first power supply, a second power supply, a third power supply, and a first voltage regulator.

3. A test apparatus for a train traction controller as claimed in claim 2, characterised in that, The first regulator pin 1 is connected to the VCC24V power supply and the positive terminal of the first power supply, respectively; The first voltage regulator pin 2 is connected to the negative terminal of the first power supply, the negative terminal of the second power supply, and the negative terminal of the third power supply, respectively; The first voltage regulator's pin 2, the first power supply negative terminal, the second power supply negative terminal, and the third power supply negative terminal are grounded; The first voltage regulator's pin 3 is connected to the positive terminals of the second and third power supplies, respectively.

4. The test apparatus for a train traction controller according to claim 1, wherein The second voltage conversion circuit includes a second voltage regulator, a fourth power supply, a fifth power supply, a first resistor, and a second regulating resistor.

5. A test apparatus for a train traction controller as claimed in claim 4, characterised in that, The second voltage regulator is an LM2991S chip.

6. A test apparatus for a train traction controller as claimed in claim 4, characterised in that, The second voltage regulator pin 3 is connected to the positive terminal of the fourth power supply and the first voltage regulator pin 3, respectively; The second regulator's pin 2 is connected to the negative terminal of the fourth power supply; The second voltage regulator pin 1 is connected to the first resistor and the second regulating resistor respectively; The fourth power supply negative terminal, pins 2 and 4 of the second voltage regulator, and the fifth power supply negative terminal are grounded; The second voltage regulator's pin 5 is connected to the first resistor and the positive terminal of the fifth power supply, respectively.

7. The test apparatus for a train traction controller of claim 1, wherein The square wave signal output circuit includes a PWM controller, a third regulating resistor, a fourth regulating resistor, a fifth resistor, a sixth resistor, a first capacitor, an N-channel MOSFET, and a sixth power supply.

8. A test apparatus for a train traction controller as claimed in claim 7, characterised in that, The PWM controller is a UC3842 chip.

9. A testing device for a train traction controller according to claim 7, characterized in that, The PWM controller pin 1 is connected to the fourth regulating resistor. The PWM controller pins 2, 3, and 5 are grounded. The PWM controller pin 4 is connected to the first capacitor and the third regulating resistor respectively. The PWM controller pin 6 is grounded on one hand through the fifth and sixth resistors in series, and on the other hand through the fifth resistor to the gate of the N-channel MOSFET. The pin 7 is connected to the first regulator pin 3, the sixth power supply positive terminal, and the drain of the N-channel MOSFET respectively.

10. A testing device for a train traction controller according to claim 7, characterized in that, The source of the N-channel MOS transistor is connected to pins 10a, 12a, 10b, and 12b of the fourth port via a single-pole double-throw switch.

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