Capacitor endurance test equipment with capacitance three-parameter test function

Abstract

This utility model discloses a capacitor durability testing device with three-parameter capacitance testing function, belonging to the technical field of capacitor durability testing equipment. It includes an AC / DC ripple test power supply, a test capacitor, an LCR digital bridge, a leakage current tester, and an intelligent control board. The AC / DC ripple test power supply is electrically connected to the test capacitor through a first relay group. The first relay group is also electrically connected to a second relay group, and through the second relay group, to a third and fourth relay group. The third relay group is electrically connected to the LCR digital bridge, and the fourth relay group is electrically connected to the leakage current tester. The LCR digital bridge and the leakage current tester are electrically connected to the intelligent control board, which is also electrically connected to the AC / DC ripple test power supply. This invention solves the problem of removing the capacitor to test the three parameters during the test, improves test efficiency, and reduces the requirements for test personnel.

Description

Technical Field

[0001] This utility model relates to an assembly positioning mechanism, and in particular to a capacitor durability testing device with a three-parameter capacitance testing function, belonging to the technical field of assembly positioning mechanisms. Background Technology

[0002] my country is the world's largest producer of capacitors. Capacitors primarily function in circuits for filtering and DC blocking. Physically, this involves repeated charging and discharging. The more frequent and rapid the charging and discharging, the greater the internal heat generation. This heat accumulation can cause excessive internal temperature, affecting the electrical performance of the capacitor's internal materials. Therefore, a lifespan test for capacitors is necessary. During the lifespan test, the test must be stopped midway, and each capacitor's three-parameter performance must be tested. After the three-parameter test, the capacitor is placed in an oven for a ripple life test. The entire test process requires 1-3 or more times of three-parameter testing and recording. However, current technologies for testing the three-parameter performance of capacitors are inefficient and require highly skilled personnel. Therefore, a capacitor durability testing device with three-parameter testing capabilities is designed to address these issues. Utility Model Content

[0003] The main purpose of this invention is to provide a capacitor durability testing device with a three-parameter capacitance testing function.

[0004] The objective of this utility model can be achieved by adopting the following technical solution:

[0005] A capacitor durability testing device with three capacitance parameters testing function includes an AC / DC ripple test power supply, a test capacitor, an LCR digital bridge, a leakage current tester, and an intelligent control board.

[0006] The AC / DC ripple test power supply is electrically connected to the test capacitor through the first relay group;

[0007] The first relay group is also electrically connected to the second relay group, and is electrically connected to the third and fourth relay groups through the second relay group;

[0008] The third relay group is electrically connected to the LCR digital bridge, the fourth relay group is electrically connected to the leakage current tester, the LCR digital bridge and the leakage current tester are electrically connected to the intelligent control board, and the intelligent control board is electrically connected to the AC / DC ripple test power supply.

[0009] Preferably, the first relay group includes relay J1B, relay J1D, relay J2B, relay J2D, relay J3B and relay J3D;

[0010] In the AC / DC ripple test power supply, AC1 is electrically connected to terminal 3 of the normally closed contact of relay J1B and terminal 6 of the normally closed contact of relay J1D.

[0011] The DC negative polarity connection in the AC / DC ripple test power supply is connected to terminal 3 of the normally closed contact of relay J2B and terminal 6 of the normally closed contact of relay J2D.

[0012] In the AC / DC ripple test power supply, AC2 is electrically connected to terminal 3 of the normally closed contact of relay J3B and terminal 6 of the normally closed contact of relay J3D.

[0013] Preferably, the test capacitors include capacitor C1 and capacitor C2, with the cathode of capacitor C1 electrically connected to the cathode of capacitor C2.

[0014] Preferably, terminal 4 of the normally closed contact of relay J1B and terminal 7 of the normally closed contact of relay J1D are electrically connected to the anode of capacitor C1.

[0015] The 4th terminal of the normally closed contact of relay J2B and the 7th terminal of the normally closed contact of relay J2D are electrically connected to the cathode of capacitor C1.

[0016] Terminal 4 of the normally closed contact of relay J3B and terminal 7 of the normally closed contact of relay J3D are electrically connected to the anode of capacitor C2.

[0017] Preferably, the second relay group includes relays J2A, J2E, J1A, J1E, J3A, and J3E;

[0018] Terminal 4 of the normally closed contact of relay J1B and terminal 7 of the normally closed contact of relay J1D are respectively connected to terminal 4 of the normally open contact of relay J1A and terminal 7 of the normally open contact of relay J1E.

[0019] Terminal 4 of the normally closed contact of relay J2B and terminal 7 of the normally closed contact of relay J2D are respectively connected to terminal 4 of the normally open contact of relay J2A and terminal 7 of the normally open contact of relay J2E.

[0020] Terminal 4 of the normally closed contact of relay J3B and terminal 7 of the normally closed contact of relay J3D are respectively connected to terminal 4 of the normally open contact of relay J3A and terminal 7 of the normally open contact of relay J3E.

[0021] Preferably, terminal 5 of the normally open contact of relay J1A and terminal 8 of the normally open contact of relay J1E are electrically connected to terminal 5 of the normally open contact of relay J3A and terminal 8 of the normally open contact of relay J3E.

[0022] The third relay group includes relays J4A, J4E, J5A, and J5E;

[0023] The 4th terminal of the normally open contact of relay J4A is electrically connected to the 5th terminal of the normally open contact of relay J2A.

[0024] The normally open contact 7 terminal of relay J4E is electrically connected to the normally open contact 8 terminal of relay J2E.

[0025] Terminal 4 of the normally open contact of relay J5A is electrically connected to terminal 5 of the normally open contact of relay J1A, and terminal 7 of the normally open contact of relay J5A is electrically connected to terminal 8 of the normally open contact of relay J1E.

[0026] Preferably, terminal 5 of the normally open contact of relay J4A is electrically connected to terminal Cx1- of the LCR digital bridge, terminal 8 of the normally open contact of relay J4E is electrically connected to terminal Cx2- of the LCR digital bridge, terminal 5 of the normally open contact of relay J5A is electrically connected to terminal Cx1+ of the LCR digital bridge, and terminal 8 of the normally open contact of relay J5E is electrically connected to terminal Cx2+ of the LCR digital bridge.

[0027] Preferably, the fourth relay group includes relays J4B, J4D, J5B, and J5D;

[0028] The 4th terminal of the normally closed contact of relay J4B and the 7th terminal of the normally closed contact of relay J4D are electrically connected to the 4th terminal of the normally open contact of relay J4A.

[0029] Terminal 4 of relay J5A is electrically connected to terminal 4 of relay J5B, and terminal 7 of the normally closed contact of relay J5D is electrically connected to terminal 7 of the normally open contact of relay J5E.

[0030] Preferably, terminal 3 of the normally closed contact of relay J4B and terminal 6 of the normally closed contact of relay J4D are connected to each other and connected to a leakage current tester.

[0031] Terminal 3 of the normally closed contact of relay J5B and terminal 6 of the normally closed contact of relay J5D are connected to each other and then connected to a leakage current tester.

[0032] The beneficial technical effects of this utility model are as follows:

[0033] This utility model provides a capacitor durability testing device with three-parameter capacitance testing function, including an AC / DC ripple test power supply, a test capacitor, an LCR digital bridge, a leakage current tester, and an intelligent control board. The AC / DC ripple test power supply is electrically connected to the test capacitor through a first relay group. The first relay group is also electrically connected to a second relay group, and through the second relay group, to a third and a fourth relay group. The third relay group is electrically connected to the LCR digital bridge, and the fourth relay group is electrically connected to the leakage current tester. The LCR digital bridge and the leakage current tester are electrically connected to the intelligent control board, which is also electrically connected to the AC / DC ripple test power supply. This solves the problem of removing the capacitor to test the three parameters during the test, improves the test efficiency, and reduces the requirements for test personnel. Attached Figure Description

[0034] Figure 1 This is a circuit diagram of a preferred embodiment of a capacitor durability testing device with three capacitance parameters according to the present invention. Detailed Implementation

[0035] To enable those skilled in the art to understand the technical solution of this utility model more clearly, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of this utility model is not limited thereto.

[0036] like Figure 1 As shown in the figure, this embodiment provides a capacitor durability testing device with three-parameter capacitance testing function, including a durability testing power supply, an oven, and a three-parameter testing device.

[0037] Normal capacitor ripple current aging circuit: The AC / DC ripple test power supply outputs AC ripple current. The ripple current flows out from AC1, through the normally closed contacts of relays J1B and J1D, and into one end of the test capacitor C1 via the output line. The ripple current flows out from the other end of C1 and then into one end of the test capacitor C2. The ripple current flows out from the other end of the test capacitor C2, through the output line, and then through the normally closed contacts of relays J3B and J3D into the AC2 terminal of the AC / DC ripple test power supply.

[0038] Normal capacitor DC charging circuit: The AC / DC ripple test voltage outputs DC charging current. Path 1: The current flows out from the AC1 terminal, through the normally closed contacts of relays J1B and J1D, and into one end of the test capacitor C1 via the output line. The DC charging current flows out from the other end of C1, through the output line, through the normally closed contacts of relays J2B and J2D, and back to the DC negative terminal of the AC / DC ripple test power supply. Path 2: The current flows out from the AC2 terminal, through the normally closed contacts of relays J3B and J3D, and into one end of the test capacitor C2 via the output line. The DC charging current flows out from the other end of C2, through the output line, through the normally closed contacts of relays J2B and J2D, and back to the DC negative terminal of the AC / DC ripple test power supply.

[0039] Capacitor C1 Capacitance and ESR Measurement Circuit: When measuring the capacitance and ESR of the test capacitor, the intelligent control board stops the AC / DC ripple test power supply and discharges the test capacitors C1 and C2. After discharge, relays J1, J2, J4, and J5 are closed. The AC / DC ripple test power supply and the test capacitor C1 are disconnected by the normally closed contacts of relays J1B, J1D, J2B, and J2D. The test capacitor C1 is connected to the LCR digital bridge test terminal through the normally open contacts of relays J2A, J2E, J1A, and J1E, and relays J4A, J4E, J5A, and J5E. The intelligent control board controls the LCR digital bridge to measure the capacitance and ESR of the test capacitor C1 via the digital communication line. The intelligent control board reads the measurement results from the LCR digital bridge via the digital communication line, and finally transmits the measurement results to the LCD human-machine interface and saves them.

[0040] Capacitor C2 Capacitance and ESR Measurement Circuit: When measuring the capacitance and ESR of the test capacitor, the intelligent control board stops the AC / DC ripple test power supply and discharges the test capacitors C1 and C2. After discharge, relays J2, J3, J4, and J5 are closed. The AC / DC ripple test power supply and the test capacitor C2 are disconnected by the normally closed contacts of relays J2B, J2D, J3B, and J3D. The test capacitor C2 is connected to the LCR digital bridge test terminal through the normally open contacts of relays J2A, J2E, J3A, and J3E, and relays J4A, J4E, J5A, and J5E. The intelligent control board controls the LCR digital bridge to measure the capacitance and ESR of the test capacitor C2 via the digital communication line. The intelligent control board reads the measurement results from the LCR digital bridge via the digital communication line, and finally transmits the measurement results to the LCD human-machine interface and saves them.

[0041] Leakage current measurement circuit for capacitor C1: When measuring the leakage current of the test capacitor, the intelligent control board stops the AC / DC ripple test power supply and discharges the test capacitors C1 and C2. After discharge, relays J1 and J2 are closed, and the AC / DC ripple test power supply and the test capacitor C1 are disconnected by the normally closed contacts of relays J1B, J1D, J2B, and J2D. The test capacitor C1 is connected to the test terminal of the leakage current tester through the normally open contacts of relays J2A, J2E, J1A, and J1E and the normally closed contacts of relays J4B, J4D, J5B, and J5D. The intelligent control board controls the leakage current tester to measure the leakage current of the test capacitor C1 via a digital communication line. The intelligent control board reads the measurement results from the leakage current tester via the digital communication line, and finally transmits the measurement results to the LCD human-machine interface and saves them.

[0042] Leakage current measurement circuit for capacitor C2: When measuring the leakage current of the test capacitor, the intelligent control board stops the output of the AC / DC ripple test power supply and discharges the test capacitors C1 and C2. After discharge, relays J2 and J3 are closed, and the AC / DC ripple test power supply and the test capacitor C2 are disconnected by the normally closed contacts of relays J2B, J2D, J3B, and J3D. The test capacitor C2 is connected to the test terminal of the leakage current tester through the normally open contacts of relays J2A, J2E, J3A, and J3E and the normally closed contacts of relays J4B, J4D, J5B, and J5D. The intelligent control board controls the leakage current tester to measure the leakage current value of the test capacitor C2 through the digital communication line. The intelligent control board reads the measurement result of the leakage current tester through the digital communication line, and finally transmits the measurement result to the LCD human-machine interface and saves it.

[0043] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A capacitor endurance test apparatus having a capacitance three-parameter test function, characterized by: Includes AC / DC ripple test power supply, test capacitor, LCR digital bridge, leakage current tester and intelligent control board; The AC / DC ripple test power supply is electrically connected to the test capacitor through the first relay group; The first relay group is also electrically connected to the second relay group, and is electrically connected to the third and fourth relay groups through the second relay group; The third relay group is electrically connected to the LCR digital bridge, the fourth relay group is electrically connected to the leakage current tester, the LCR digital bridge and the leakage current tester are electrically connected to the intelligent control board, and the intelligent control board is electrically connected to the AC / DC ripple test power supply.

2. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 1, characterized by: The first relay group includes relays J1B, J1D, J2B, J2D, J3B, and J3D. In the AC / DC ripple test power supply, AC1 is electrically connected to terminal 3 of the normally closed contact of relay J1B and terminal 6 of the normally closed contact of relay J1D. The DC negative polarity connection in the AC / DC ripple test power supply is connected to terminal 3 of the normally closed contact of relay J2B and terminal 6 of the normally closed contact of relay J2D. In the AC / DC ripple test power supply, AC2 is electrically connected to terminal 3 of the normally closed contact of relay J3B and terminal 6 of the normally closed contact of relay J3D.

3. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 2, characterized by: The test capacitors include capacitor C1 and capacitor C2, with the cathode of capacitor C1 electrically connected to the cathode of capacitor C2.

4. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 3, characterized by: Terminal 4 of the normally closed contact of relay J1B and terminal 7 of the normally closed contact of relay J1D are electrically connected to the anode of capacitor C1. The 4th terminal of the normally closed contact of relay J2B and the 7th terminal of the normally closed contact of relay J2D are electrically connected to the cathode of capacitor C1. Terminal 4 of the normally closed contact of relay J3B and terminal 7 of the normally closed contact of relay J3D are electrically connected to the anode of capacitor C2.

5. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 4, characterized by: The second relay group includes relays J2A, J2E, J1A, J1E, J3A, and J3E; Terminal 4 of the normally closed contact of relay J1B and terminal 7 of the normally closed contact of relay J1D are respectively connected to terminal 4 of the normally open contact of relay J1A and terminal 7 of the normally open contact of relay J1E. Terminal 4 of the normally closed contact of relay J2B and terminal 7 of the normally closed contact of relay J2D are respectively connected to terminal 4 of the normally open contact of relay J2A and terminal 7 of the normally open contact of relay J2E. Terminal 4 of the normally closed contact of relay J3B and terminal 7 of the normally closed contact of relay J3D are respectively connected to terminal 4 of the normally open contact of relay J3A and terminal 7 of the normally open contact of relay J3E.

6. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 5, wherein: The 5 terminal of the normally open contact of relay J1A and the 8 terminal of the normally open contact of relay J1E are electrically connected to the 5 terminal of the normally open contact of relay J3A and the 8 terminal of the normally open contact of relay J3E. The third relay group includes relays J4A, J4E, J5A, and J5E; The 4th terminal of the normally open contact of relay J4A is electrically connected to the 5th terminal of the normally open contact of relay J2A. The normally open contact 7 terminal of relay J4E is electrically connected to the normally open contact 8 terminal of relay J2E. Terminal 4 of the normally open contact of relay J5A is electrically connected to terminal 5 of the normally open contact of relay J1A, and terminal 7 of the normally open contact of relay J5A is electrically connected to terminal 8 of the normally open contact of relay J1E.

7. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 6, characterized by: The normally open contact 5 terminal of relay J4A is electrically connected to the Cx1- terminal of the LCR digital bridge; the normally open contact 8 terminal of relay J4E is electrically connected to the Cx2- terminal of the LCR digital bridge; the normally open contact 5 terminal of relay J5A is electrically connected to the Cx1+ terminal of the LCR digital bridge; and the normally open contact 8 terminal of relay J5E is electrically connected to the Cx2+ terminal of the LCR digital bridge.

8. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 7, characterized by: The fourth relay group includes relays J4B, J4D, J5B, and J5D. The 4th terminal of the normally closed contact of relay J4B and the 7th terminal of the normally closed contact of relay J4D are electrically connected to the 4th terminal of the normally open contact of relay J4A. Terminal 4 of relay J5A is electrically connected to terminal 4 of relay J5B, and terminal 7 of the normally closed contact of relay J5D is electrically connected to terminal 7 of the normally open contact of relay J5E.

9. The capacitor endurance test apparatus having a capacitance three parameter test function according to claim 8, characterized by: The normally closed contact 3 terminal of relay J4B and the normally closed contact 6 terminal of relay J4D are connected to each other and then connected to a leakage current tester. Terminal 3 of the normally closed contact of relay J5B and terminal 6 of the normally closed contact of relay J5D are connected to each other and then connected to a leakage current tester.

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