A direct current arc experiment platform

Abstract

This utility model relates to the field of electric arc experiment simulation technology, and in particular to a DC electric arc experimental platform, comprising: a DC power supply, an intelligent controller, an adjustable resistive load box, a DC electric arc generator, and a circuit breaker. The intelligent controller, DC power supply, circuit breaker, adjustable resistive load box, and DC electric arc generator constitute the main circuit. When the adjustable resistive load box is connected in series with the DC electric arc generator, it is used to simulate a series-type fault arc generated in a DC power supply system; when the adjustable resistive load box is connected in parallel with the DC electric arc generator, it is used to simulate a parallel-type fault arc generated in a DC power supply system. This utility model simulates the generation of DC electric arcs through experiments, facilitating subsequent exploration of the interaction mechanism between various physical quantities and the generation of DC electric arcs, and providing great convenience for studying the generation mechanism and characteristics of DC electric arcs.

Description

Technical Field

[0001] This utility model relates to the field of electric arc experiment simulation technology, and in particular to a DC electric arc experiment platform. Background Technology

[0002] Because low-voltage DC systems have low insulation levels and numerous connections, DC arcing can occur during operation due to conductor insulation damage, poor contact, or loose connections. Since DC arcs lack a zero-crossing point, they are prone to stable combustion, and continuous arcing can easily cause fires and other accidents, threatening personal safety and causing significant losses to electricity customers and the power grid. Therefore, establishing a DC arc experimental platform to simulate and explore the interaction mechanisms between various physical quantities and the generation of DC arcs has become an urgent problem to be solved in this field. Utility Model Content

[0003] The purpose of this invention is to provide a DC arc experimental platform to simulate and explore the interaction mechanism between various physical quantities and the generation of DC arc.

[0004] To achieve the above objectives, this utility model provides a DC arc experimental platform, the platform comprising:

[0005] DC power supply, intelligent controller, adjustable resistive load box, DC arc generator and circuit breaker;

[0006] The intelligent controller is connected to the DC arc generator, the DC power supply, and the adjustable resistor load box respectively. The adjustable resistor load box is connected to the DC power supply, the circuit breaker is connected to the DC power supply, the adjustable resistor load box is connected to the DC arc generator, and the circuit breaker is connected to the DC arc generator.

[0007] Optionally, the platform further includes:

[0008] A Hall current sensor is disposed between the adjustable resistive load box and the DC power supply; the Hall current sensor is connected to the intelligent controller, the adjustable resistive load box and the DC power supply respectively.

[0009] Optionally, the intelligent controller includes: a housing with four knobs, the four knobs being a first knob, a second knob, a third knob, and a fourth knob; a control chip is disposed inside the housing, the control chip being connected to the four knobs, the DC power supply, the adjustable resistive load box, the DC arc generator, and the Hall current sensor.

[0010] Optionally, the intelligent controller further includes: at least one digital tube; when four digital tubes are set, the four digital tubes are respectively the first digital tube, the second digital tube, the third digital tube and the fourth digital tube; the control chip is connected to the four digital tubes respectively.

[0011] Optionally, the adjustable resistive load box includes five input terminals and one output terminal, wherein four input terminals are respectively connected to the intelligent controller via a third signal line, and the other input terminal is connected to the DC power supply via a first wire; the output terminal is connected to the DC arc generator via a third wire.

[0012] Optionally, the adjustable resistive load box is equipped with an automatic current adjustment loop; the automatic current adjustment loop includes four branches, each branch consisting of a resistor and a relay, and the resistance values ​​of the four branches are different.

[0013] Optionally, the DC arc generator includes:

[0014] The system comprises a base, a stepper motor, an insulating mounting platform, a movable slider, a slide rail, two insulating supports, a fixed electrode, and a movable electrode. The stepper motor is located at one end of the base, with one end connected to the control chip and the other end connected to one end of the slide rail. The fixed electrode is fixed to the insulating mounting platform via one of the insulating supports, and the movable electrode is fixed to the movable slider via the other insulating support. The other end of the slide rail is located on the insulating mounting platform, and the movable slider slides on the slide rail. The insulating mounting platform is fixed to the end of the base away from the stepper motor.

[0015] Optionally, the movable electrode can replace electrodes of different diameters and shapes.

[0016] This utility model also provides a DC arc experimental platform, the platform comprising:

[0017] DC power supply, intelligent controller, adjustable resistive load box, DC arc generator and circuit breaker;

[0018] The intelligent controller is connected to the DC arc generator, the DC power supply and the adjustable resistor load box respectively. The adjustable resistor load box is connected in parallel with the DC arc generator. The circuit breaker is connected to one end of the DC power supply and one end of the DC arc generator respectively. The other end of the DC arc generator is connected to the DC power supply.

[0019] Optionally, the platform further includes:

[0020] A Hall current sensor is disposed between the DC arc generator and the DC power supply; the Hall current sensor is connected to the intelligent controller, the DC arc generator and the DC power supply respectively.

[0021] According to the specific embodiments provided by this utility model, the following technical effects are disclosed:

[0022] This invention discloses a DC arc experimental platform, comprising: a DC power supply, an intelligent controller, an adjustable resistive load box, a DC arc generator, and a circuit breaker. The intelligent controller, DC power supply, circuit breaker, adjustable resistive load box, and DC arc generator constitute the main circuit. When the adjustable resistive load box is connected in series with the DC arc generator, it is used to simulate a series-type fault arc generated in a DC power supply system; when the adjustable resistive load box is connected in parallel with the DC arc generator, it is used to simulate a parallel-type fault arc generated in a DC power supply system. This invention simulates the generation of DC arcs through experiments, facilitating subsequent exploration of the interaction mechanism between various physical quantities and the generation of DC arcs, and providing great convenience for studying the generation mechanism and characteristics of DC arcs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall connection of a DC arc experimental platform according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the appearance of the intelligent controller according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the DC arc generator structure according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the adjustable resistive load box according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the control logic of the adjustable resistor load box according to an embodiment of the present invention;

[0029] Among them, 1. First digital tube; 2. Second digital tube; 3. Third digital tube; 4. Fourth digital tube; 5. First knob; 6. Second knob; 7. Third knob; 8. Fourth knob; 9. Relay; 10. DC load; 11. Stepper motor; 12. Fixed electrode; 13. Movable slider; 14. Slide rail; 15. Circuit breaker; 16. DC power supply; 17. First signal line; 18. Second signal line; 19. Third signal line; 20. First wire; 21. Second wire; 22. Third wire; 23. Fourth wire; 24. Hall current sensor; 25. Data acquisition signal line. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The purpose of this invention is to provide a DC arc experimental platform to simulate and explore the interaction mechanism between various physical quantities and the generation of DC arc.

[0032] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1-5 As shown, this utility model discloses a DC arc experimental platform, which includes: a DC power supply 16, an intelligent controller, an adjustable resistive load box, a DC arc generator, and a circuit breaker 15. The intelligent controller is connected to the DC arc generator via a first signal line 17, to the DC power supply 16 via a second signal line 18, and to the adjustable resistive load box via a third signal line 19. The adjustable resistive load box is connected to the DC power supply 16 via a first wire 20. The circuit breaker 15 is connected to the DC power supply 16 via a second wire 21, to the DC arc generator via a third wire 22, and to the DC arc generator via a fourth wire 23. The intelligent controller, DC power supply 16, circuit breaker 15, adjustable resistive load box, and DC arc generator constitute the main circuit for simulating the generation of an arc in a DC power supply system. This facilitates subsequent exploration of the interaction mechanism between various physical quantities and the generation of the DC arc, providing significant convenience for studying the generation mechanism and characteristics of DC arcs.

[0034] As an optional implementation, the platform further includes: a Hall current sensor 24, disposed between the adjustable resistive load box and the DC power supply 16; the intelligent controller is connected to the Hall current sensor 24 via a data acquisition signal line 25, and the Hall current sensor 24 is connected to the adjustable resistive load box and the DC power supply 16 via a first wire 20. This invention detects the circuit current through the Hall current sensor 24 and then sends the data to the intelligent controller for display.

[0035] As an optional implementation, the intelligent controller of this utility model includes: a housing with four knobs, namely a first knob 5, a second knob 6, a third knob 7, and a fourth knob 8; a control chip is disposed inside the housing, and the control chip is connected to the four knobs, a DC power supply 16, an adjustable resistive load box, a DC arc generator, and a Hall current sensor 24. The first knob 5 is used to control the direction of electrode movement, the second knob 6 is used to adjust the set electrode movement speed, the third knob 7 is used to adjust the set voltage, and the fourth knob 8 is used to adjust the set current. The signal commands given by the four knobs control the DC arc generator, the DC voltage, and the adjustable resistive load box respectively through the control chip. The control chip only performs the function of command transmission, and conventional control chips such as the 51 series and STM32 can be used to achieve this, which will not be discussed in detail here.

[0036] The casing may also include at least one digital tube. When one digital tube is used, it is used to display the actual current value. When two digital tubes are used, they are used to display the current and voltage values. When four digital tubes are used, they are designated as Digital Tube 1 (first digital tube 1), Digital Tube 2 (second digital tube 2), Digital Tube 3 (third digital tube 3), and Digital Tube 4 (fourth digital tube 4). The control chip is connected to each of the four digital tubes. Digital Tube 1 displays the current magnitude, Digital Tube 2 displays the voltage magnitude, Digital Tube 3 displays the electrode movement mode, and Digital Tube 4 displays the arc length.

[0037] This utility model's intelligent controller uses four knobs to control the magnitude of the DC voltage, the electrode movement speed and direction of the DC arc generator, and the automatic adjustment circuit current in the adjustable resistive load box. Simultaneously, it utilizes Hall current sensors 24 and Hall voltage sensors to detect the circuit, returning the current and voltage values ​​to two digital displays. The movement speed and direction can be detected using multiple infrared sensors, but details are not discussed further.

[0038] As an optional implementation, the DC power supply 16 in this utility model is model HJS-480-0-300, the Hall current sensor 24 is model K10A-P3S5-800, and the circuit breaker 15 is model NXB-63.

[0039] like Figures 4-5 As shown, the adjustable resistive load cell of this invention includes five input terminals and one output terminal, wherein four input terminals (i.e., ...) Figure 5 a, b, c, and d) are connected to the intelligent controller via the third signal line 19, and the other input terminal (i.e. Figure 5 20) is connected to the DC power supply 16 via the first wire 20; the output terminal (i.e. Figure 5 22) is connected to the DC arc generator via the third wire 22. The adjustable resistive load box of this utility model is equipped with an automatic current adjustment circuit; the automatic current adjustment circuit includes four branches, each branch consisting of a resistor and a relay 9, and the resistance values ​​of the four branches are different.

[0040] This invention allows the control chip to receive instructions by adjusting the fourth knob 8 to different positions. Then, the control chip uses the output circuit to control the relays 9K1-K4 to achieve the parallel combination of various resistors, thereby changing the total load resistance and indirectly realizing the function of adjusting the circuit current.

[0041] As an optional implementation, the DC arc generator of this utility model includes: a base, a stepper motor 11, an insulating fixed platform, a movable slider 13, a slide rail 14, two insulating supports, a fixed electrode 12, and a movable electrode. The stepper motor 11 is disposed at one end of the base, one end of which is connected to a control chip, and the other end of which is connected to one end of the slide rail 14. The fixed electrode 12 is fixed to the insulating fixed platform by one of the insulating supports, and the movable electrode is fixed to the movable slider 13 by the other insulating support. The other end of the slide rail 14 is disposed on the insulating fixed platform, and the movable slider 13 is slidably disposed on the slide rail 14. The insulating fixed platform is fixed at the other end of the base away from the stepper motor 11. The movable electrode is connected to a circuit breaker 15, and the fixed electrode 12 is connected to the output terminal of an adjustable resistive load box. The movable electrode can replace electrodes of different diameters and shapes, making it suitable for different applications.

[0042] When conducting DC arc experiments using this platform, the moving electrode should be adjusted to a suitable position beforehand, and the arc gap should be closed. After setting the intelligent controller, first close the circuit breaker 15 in the test platform to bring the circuit to a stable working state. Then, adjust the first knob 5 and the second knob 6 until the two electrodes are in the separation mode. During the slow separation of the two electrodes, a DC arc will appear between the two electrodes, accompanied by a violent sound and light reaction. This process is the arc ignition action.

[0043] When using this invention to simulate a series fault arc generated in a DC power supply system, adjust the moving electrode to a suitable position to ensure an appropriate distance between the arcs. First, close the circuit breaker 15, set the voltage, and then rotate the current control knob (fourth knob 8) on the intelligent controller. The control chip automatically controls the intelligent resistor box to adjust to the set resistance to obtain the set current, simulating the stable circuit before the fault. By adjusting the electrode movement speed knob (second knob 6), the electrode movement knob is set to the separation mode, and the DC arc generator electrodes will separate at the set speed, thereby generating an arc. After recording the required experimental data, disconnect the circuit breaker 15, and the DC arc will extinguish. When testing a series fault arc, the circuit breaker 15 can not only control the normal operation of the load but also control the extinguishing of the arc.

[0044] When simulating parallel fault arcs generated in a DC power supply system, the DC arc generator can be connected in parallel with an adjustable resistive load box, and the above operation can be repeated to further study the parallel fault arcs.

[0045] In this experiment, the following parameters are adjustable: 1. The experimental voltage and current can be adjusted using the third knob 7 and the fourth knob 8 on the intelligent controller. 2. The electrode movement speed is adjusted using the second knob 6 on the intelligent controller, with four speed settings: low speed (2.5 mm / s), medium-low speed (5 mm / s), medium-high speed (7.5 mm / s), and high speed (10 mm / s). 3. The arc length is adjusted by controlling the separation and closure of the two electrodes using the first knob 5, thereby controlling the arc length under arcing conditions. 4. Electrode shape: This experimental platform uses cylindrical 10 mm diameter copper rods by default. Electrodes of different diameters and shapes can be disassembled and replaced if needed.

[0046] In addition, the burning of the electric arc will generate a large amount of heat that will erode the copper rod electrode. To ensure the accuracy and consistency of the experimental data, the electrode rod should be polished under safe conditions before the next experiment.

[0047] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0048] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A direct current arc experimental platform, characterized in that, The platform includes: DC power supply, intelligent controller, adjustable resistive load box, DC arc generator and circuit breaker; The intelligent controller is connected to the DC arc generator, the DC power supply, and the adjustable resistor load box respectively. The adjustable resistor load box is connected to the DC power supply, the circuit breaker is connected to the DC power supply, the adjustable resistor load box is connected to the DC arc generator, and the circuit breaker is connected to the DC arc generator.

2. The direct current arc test platform of claim 1, wherein, The platform also includes: A Hall current sensor is disposed between the adjustable resistive load box and the DC power supply; the Hall current sensor is connected to the intelligent controller, the adjustable resistive load box and the DC power supply respectively.

3. The direct current arc test platform of claim 2, wherein, The intelligent controller includes: a housing with four knobs, namely a first knob, a second knob, a third knob, and a fourth knob; a control chip is disposed inside the housing, and the control chip is connected to the four knobs, the DC power supply, the adjustable resistive load box, the DC arc generator, and the Hall current sensor.

4. The direct current arc test platform of claim 3, wherein, The intelligent controller further includes: at least one digital tube; when four digital tubes are set, the four digital tubes are respectively the first digital tube, the second digital tube, the third digital tube and the fourth digital tube; the control chip is connected to the four digital tubes respectively.

5. The direct current arc test platform of claim 1, wherein, The adjustable resistive load cell includes five input terminals and one output terminal. Four of the input terminals are connected to the intelligent controller via third signal lines, and the other input terminal is connected to the DC power supply via a first wire. The output terminal is connected to the DC arc generator via a third wire.

6. The direct current arc test platform of claim 5, wherein, The adjustable resistive load box is equipped with an automatic current adjustment circuit; the automatic current adjustment circuit includes four branches, each of which consists of a resistor and a relay, and the resistance values ​​of the four branches are different.

7. The direct current arc test platform of claim 3, wherein, The DC arc generator includes: The system comprises a base, a stepper motor, an insulating mounting platform, a movable slider, a slide rail, two insulating supports, a fixed electrode, and a movable electrode. The stepper motor is located at one end of the base, with one end connected to the control chip and the other end connected to one end of the slide rail. The fixed electrode is fixed to the insulating mounting platform via one of the insulating supports, and the movable electrode is fixed to the movable slider via the other insulating support. The other end of the slide rail is located on the insulating mounting platform, and the movable slider slides on the slide rail. The insulating mounting platform is fixed to the end of the base away from the stepper motor.

8. The direct current arc test platform of claim 7, wherein, The movable electrode can replace electrodes of different diameters and shapes.

9. A direct current arc experimental platform, characterized in that, The platform includes: DC power supply, intelligent controller, adjustable resistive load box, DC arc generator and circuit breaker; The intelligent controller is connected to the DC arc generator, the DC power supply and the adjustable resistor load box respectively. The adjustable resistor load box is connected in parallel with the DC arc generator. The circuit breaker is connected to one end of the DC power supply and one end of the DC arc generator respectively. The other end of the DC arc generator is connected to the DC power supply.

10. The direct current arc test platform of claim 9, wherein, The platform further comprises: a Hall current sensor arranged between the direct current arc generator and the direct current power supply; the Hall current sensor is connected with the intelligent controller, the direct current arc generator and the direct current power supply respectively.

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