Arc suppression coil direct current resistance tester capable of automatically shifting gears

Abstract

The utility model discloses an arc suppression coil direct current resistance tester capable of automatically shifting gears. The resistance tester comprises a measurement and control mainboard, a program control direct current power supply, a direct current power supply output relay, an arc suppression coil, a gear shifting controller, an upshift relay, a downshift relay and an arc suppression coil gear shifting mechanism. The resistance at the two ends of the arc suppression coil can be automatically measured.

Description

Technical Field

[0001] This application relates to a resistance tester, specifically to an arc suppression coil DC resistance tester with automatic range adjustment. Background Technology

[0002] Arc suppression coils are crucial protective devices in power systems, rapidly interrupting current and extinguishing arcs when circuit faults occur, protecting equipment and personnel from damage. DC resistance measurement is a key indicator for assessing the condition of arc suppression coils. By measuring the DC resistance of the coil, the integrity of internal electrical connections and the presence of damage or corrosion can be checked. Normal DC resistance values ​​indicate proper operation, while abnormal values ​​may suggest potential faults or damage. Regular DC resistance testing helps identify problems early and allows for preventative maintenance, ensuring reliable operation of the arc suppression coil when needed. Therefore, measuring the DC resistance of arc suppression coils is essential for the stable operation of power systems and personnel safety. Existing measurement methods use transformer DC resistance testers, requiring manual range adjustment. Therefore, there is an urgent need to design a device capable of automatically testing the DC resistance of arc suppression coils. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this application is to provide an automatic range-adjusting DC resistance tester for arc suppression coils, which can improve the testing efficiency and accuracy of arc suppression coils.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An automatic range-adjusting arc suppression coil DC resistance tester includes: a control motherboard, a programmable DC power supply, a DC power supply output relay, an arc suppression coil, a range-adjusting controller, an up-range relay, a down-range relay, and an arc suppression coil range-adjusting mechanism. The control motherboard is connected to the input terminals of the programmable DC power supply and the range-adjusting controller via an RS485 bus. The first terminal of the programmable DC power supply is connected to the first terminal of the arc suppression coil via the DC power supply output relay, and the second terminal of the programmable DC power supply is connected to the second terminal of the arc suppression coil. The programmable DC power supply, the DC power supply output relay, and the arc suppression coil form a circuit. The output terminal of the range-adjusting controller is connected to the first input terminal of the arc suppression coil range-adjusting mechanism. The control terminal of the range-adjusting controller is connected to both the up-range relay and the down-range relay. The up-range relay and the down-range relay are connected in parallel, and the first terminals of the up-range relay and the down-range relay are both connected to the second input terminal of the arc suppression coil range-adjusting mechanism.

[0006] Optionally, the resistance tester further comprises an alternating current power supply, a first end of the alternating current power supply is connected to a third input end of the arc-extinguishing coil gear shifting mechanism, and a second end of the alternating current power supply is connected to a second end of the upshift relay and a second end of the downshift relay.

[0007] Optionally, the measurement and control mainboard adopts an IMX6QDL chip.

[0008] Optionally, the program-controlled direct current power supply comprises a current sampling circuit, a control loop, a feedback circuit and a voltage control circuit.

[0009] Compared with the prior art, the automatic-gear-shifting arc-extinguishing coil direct current resistance tester has the beneficial effects that: by applying a constant current, the automatic-gear-shifting arc-extinguishing coil direct current resistance tester can automatically measure the voltage across the arc-extinguishing coil and calculate the resistance value of the arc-extinguishing coil by using Ohm's law. The tester can select the best test parameters through the automatic-gear-shifting system, thereby ensuring the accuracy and efficiency of the test. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural schematic diagram of an automatic-gear-shifting arc-extinguishing coil direct current resistance tester provided by an embodiment of the present application;

[0011] The reference signs are explained as follows:

[0012] 1, measurement and control mainboard; 2, program-controlled direct current power supply; 3, direct current power supply output relay; 4, arc-extinguishing coil; 5, gear shifting controller; 6, upshift relay; 7, downshift relay; 8, alternating current power supply; 9, arc-extinguishing coil gear shifting mechanism. DETAILED DESCRIPTION

[0013] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Although the specific embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0014] It should be noted that some terms are used in the description and claims herein. Those skilled in the art will understand that one name can be used to refer to one component by different people. The description and claims herein do not distinguish components by the difference in names, but by the difference in functions. As mentioned throughout the description and claims, "including" or "including" is an open term, so it should be interpreted as "including but not limited to". The subsequent description is a preferred embodiment of the application, which is for the purpose of the general principles of the description, and not to limit the scope of the application. The scope of protection of the application is defined by the appended claims.

[0015] In order to understand the embodiments of the application, the following will be further explained and described with specific examples combined with the drawings, and each drawing does not constitute a limitation to the embodiments of the application.

[0016] Figure 1 An automatic file adjusting arc suppression coil DC resistance tester provided by an exemplary embodiment of the application, comprising: a measurement and control mainboard 1, a program-controlled DC power supply 2, a DC power supply output relay 3, an arc suppression coil 4, a file adjusting controller 5, a file raising relay 6, a file lowering relay 7 and an arc suppression coil file adjusting mechanism 9, wherein the measurement and control mainboard 1 is connected with the input end of the program-controlled DC power supply 2 and the file adjusting controller 5 through an RS485 bus, the first end of the program-controlled DC power supply 2 is connected with the first end of the arc suppression coil 4 through the DC power supply output relay 3, the second end of the program-controlled DC power supply 2 is connected with the second end of the arc suppression coil 4, and the program-controlled DC power supply 2, the DC power supply output relay 3 and the arc suppression coil 4 constitute a loop; the output end of the file adjusting controller 5 is connected with the first input end of the arc suppression coil file adjusting mechanism 9; the control end of the file adjusting controller 5 is connected with the file raising relay 6 and the file lowering relay 7 respectively; the file raising relay 6 and the file lowering relay 7 are connected in parallel, and the first end of the file raising relay 6 and the first end of the file lowering relay 7 are commonly connected with the second input end of the arc suppression coil file adjusting mechanism 9.

[0017] In another embodiment, the resistance tester further comprises an alternating current power supply 8, the first end of the alternating current power supply 8 is connected with the third input end of the arc suppression coil file adjusting mechanism 9, and the second end of the alternating current power supply 8 is simultaneously connected with the second end of the file raising relay 6 and the second end of the file lowering relay 7.

[0018] In another embodiment, the measurement and control mainboard 1 adopts an IMX6QDL chip with CORTEX A9 as the core.

[0019] In this embodiment, the measurement and control mainboard 1 serves as a central control unit, reads the current, voltage across the coil and state bit in the program-controlled direct current power supply 2 through the RS485 bus, and controls the start and stop of the program-controlled direct current power supply 2. According to the tested resistance value and the current gear value, the measurement and control mainboard 1 sends a gear up or down command to the gear control controller 5 through the RS485 bus.

[0020] In addition, the measurement and control mainboard 1 also has the functions of LCD display, WIFI communication, and U disk storage.

[0021] In another embodiment, the program-controlled direct current power supply 2 includes a current sampling circuit, a control loop, a feedback circuit and a voltage control circuit.

[0022] In this embodiment, the current sampling circuit is used to measure the output current and feed back the actual current value to the control loop. The control loop is used to compare the actual current value fed back by the current sampling circuit with the set current value, and adjust the output current through a control element (such as a MOS tube) to keep the output current constant. The voltage control circuit is used to adjust the output voltage according to the voltage value set by the user. The feedback circuit is used to monitor the output voltage and maintain a stable output voltage by adjusting the voltage control element (such as a voltage stabilizing tube, an operational amplifier, etc.).

[0023] Next, the application describes the measurement process of the arc-extinguishing coil by the device:

[0024] 1. Connect the arc-extinguishing coil to be tested:

[0025] Connect the arc-extinguishing coil to be tested to the test device and ensure that the connection is stable, wherein,

[0026] One end of the arc-extinguishing coil is connected to the first end of the program-controlled direct current power supply 2 through the direct current power supply output relay 3, and the other end of the arc-extinguishing coil is directly connected to the second end of the program-controlled direct current power supply 2.

[0027] 2. Start the test device:

[0028] Start the measurement and control mainboard 1 and communicate with the program-controlled direct current power supply 2 and the gear control controller 5 through the RS485 bus.

[0029] 3. Automatic gear adjustment:

[0030] Start the gear control controller 5, read the gear encoder state in the arc-extinguishing coil gear adjustment mechanism 9 to obtain the current gear. The gear control controller 5 transmits the current gear value to the measurement and control mainboard 1 through the RS485 bus.

[0031] Further, according to the parameters of the arc suppression coil, the measurement and control mainboard 1 sends a gear up or gear down command to the gear control controller 5 through the RS485 bus, and the gear control controller 5 controls the gear up relay 6 or the gear down relay 7 to adjust the gear.

[0032] 4. Apply constant current:

[0033] When the start test is clicked, the measurement and control mainboard 1 controls the program-controlled DC power supply 2 to output the set constant current through the RS485 bus. The DC power supply output relay 3 is closed, and the constant DC current flows through the two ends of the arc suppression coil.

[0034] 5. Measure voltage:

[0035] The program-controlled DC power supply 2 measures the output current through the current sampling circuit and measures the voltage across the arc suppression coil through the voltage control circuit. The measurement and control mainboard 1 reads the current value and voltage value in the program-controlled DC power supply 2 through the RS485 bus.

[0036] 6. Calculate resistance:

[0037] According to Ohm's law R=V / I, the measurement and control mainboard 1 calculates the resistance value of the arc suppression coil.

[0038] Wherein, V is the voltage across the arc suppression coil, and I is the current flowing through the arc suppression coil.

[0039] 7. Record and analyze data:

[0040] The measurement and control mainboard 1 records the measured resistance value and other related data, and the measurement and control mainboard 1 analyzes the test results through the built-in data acquisition and analysis system, so as to evaluate the state and performance of the arc suppression coil.

[0041] The above embodiments are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An automatic-tuning arc-suppression coil DC resistance tester characterized by comprising: The resistance tester comprises: The control mainboard, the program-controlled direct current power supply, the direct current power supply output relay, the arc elimination coil, the gear control device, the gear up relay, the gear down relay and the arc elimination coil gear control mechanism, wherein, The control mainboard is connected with the program-controlled direct current power supply and the input end of the gear control device through the RS485 bus, the first end of the program-controlled direct current power supply is connected with the first end of the arc elimination coil through the direct current power supply output relay, the second end of the program-controlled direct current power supply is connected with the second end of the arc elimination coil, and the program-controlled direct current power supply, the direct current power supply output relay and the arc elimination coil form a loop. The output end of the gear control device is connected with the first input end of the arc elimination coil gear control mechanism, the control end of the gear control device is connected with the gear up relay and the gear down relay respectively, the gear up relay and the gear down relay are connected in parallel, and the first end of the gear up relay and the first end of the gear down relay are connected with the second input end of the arc elimination coil gear control mechanism.

2. The resistance tester of claim 1, wherein, The resistance tester further comprises an alternating current power supply, the first end of the alternating current power supply is connected with the third input end of the arc elimination coil gear control mechanism, and the second end of the alternating current power supply is connected with the second end of the gear up relay and the second end of the gear down relay.

3. The resistance tester of claim 1, wherein, The control mainboard adopts an IMX6QDL chip.

4. The resistance tester of claim 1, wherein, The program-controlled direct current power supply comprises a current sampling circuit, a control loop, a feedback circuit and a voltage control circuit.

Images