Capacitor rapid charging and discharging test circuit

Abstract

The utility model discloses a capacitor rapid charging and discharging test circuit comprising a charging and discharging control unit, an adjustable DC power supply, a main control unit, a discharging cut-off voltage control unit, and a capacitor to be tested. The adjustable direct-current power supply is connected with the charging and discharging control unit, the charging and discharging control unit is connected with a capacitor to be detected, the discharging cut-off voltage control unit is connected with the capacitor to be detected, and the main control unit is connected with the charging and discharging control unit and the discharging cut-off voltage control unit. According to the utility model, the switching tube is adopted to rapidly control the charging and discharging processes of the capacitor, the charging and discharging voltage of the capacitor can be monitored in real time, and the charging and discharging time and voltage are further controlled, so that the actual application working condition of the capacitor is effectively simulated, and the working efficiency of the capacitor is improved. And a data support basis is provided for analyzing failure reasons of the capacitor, so that the performance and the service life of the capacitor are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitor charging and discharging tests, in particular to a capacitor rapid charging and discharging test circuit. Background Art

[0002] Capacitors are one of the commonly used components in electronic circuits. They are used to store charge and play filtering, coupling and other roles in circuits. However, as the number of times a capacitor is charged and discharged increases, its capacity and voltage will change, ultimately affecting the performance and life of the capacitor.

[0003] How to better control the charging and discharging process of the capacitor? To this end, a capacitor fast charging and discharging test circuit is proposed. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to better control the charging and discharging process of a capacitor, and provides a capacitor fast charging and discharging test circuit.

[0005] The utility model solves the above technical problems through the following technical solutions. The utility model comprises a charge and discharge control unit, an adjustable DC power supply, a main control unit, a discharge cut-off voltage control unit, and a capacitor to be measured; the adjustable DC power supply is connected to the charge and discharge control unit, the charge and discharge control unit is connected to the capacitor to be measured, the discharge cut-off voltage control unit is connected to the capacitor to be measured, and the main control unit is respectively connected to the charge and discharge control unit and the discharge cut-off voltage control unit, and is used for controlling the charging and discharging process of the capacitor through the charge and discharge control unit, and controlling the discharge cut-off voltage of the capacitor through the discharge cut-off voltage control unit.

[0006] Preferably, the positive terminal of the adjustable DC power supply is connected to the positive terminal of the charge and discharge control unit, and the negative terminal is connected to the negative terminal of the charge and discharge control unit and the second pin of the capacitor to be measured, and is also connected to the negative terminal of the discharge cut-off voltage control unit.

[0007] Preferably, the charge and discharge control unit includes a switch tube V1, a switch tube V2, a diode D1, a diode D2, a resistor R1, and a resistor R2; the positive terminal of the charge and discharge control unit is connected to the C pin of the switch tube V1, and the G pin of the switch tube V1 is connected to the Vg1 terminal of the charge and discharge control unit; the G pin of the switch tube V2 is connected to the Vg2 terminal of the charge and discharge control unit, and the E pin of the switch tube V2 is connected to the negative terminal of the charge and discharge control unit; the C pin of the switch tube V2 is connected to the E pin of the switch tube V1, and is also connected to the first pin of the diode D1 and the second pin of the diode D2; the second pin of the diode D1 is connected to the first pin of the resistor R1; the first pin of the diode D2 is connected to the first pin of the resistor R2; the second pin of the resistor R1 is connected to the second pin of the resistor R2, and is also connected to the CX+ terminal of the charge and discharge control unit.

[0008] Preferably, the resistor R1 is a charging resistor, and the resistor R2 is a discharging resistor.

[0009] Preferably, the switch tube V1 and the switch tube V2 are IGBT or MOSFET.

[0010] Preferably, the discharge cut-off voltage control unit includes a comparator U1A, a resistor R3, and a resistor R4; the CX+ terminal of the discharge cut-off voltage control unit is connected to the second pin of the resistor R3; the negative terminal of the discharge cut-off voltage control unit is connected to the first pin of the resistor R4; the first pin of the resistor R3 is connected to the second pin of the resistor R4, and is also connected to the third pin of the comparator U1A; the first pin of the comparator U1A is connected to the Vc terminal of the discharge cut-off voltage control unit; and the second pin of the comparator U1A is connected to the Vt terminal of the discharge cut-off voltage control unit.

[0011] Preferably, the CX+ terminal of the charge and discharge control unit is connected to the first pin of the capacitor to be measured, and is correspondingly connected to the CX+ terminal of the discharge cut-off voltage control unit; the Vg1 terminal of the charge and discharge control unit is correspondingly connected to the Vg1 terminal of the main control unit, and the Vg2 terminal of the charge and discharge control unit is correspondingly connected to the Vg2 terminal of the main control unit.

[0012] Preferably, the Vc terminal of the discharge cut-off voltage control unit is connected to the Vc terminal of the main control unit correspondingly, and the Vt terminal of the discharge cut-off voltage control unit is connected to the Vt terminal of the main control unit correspondingly.

[0013] Compared with the prior art, the utility model has the following advantages: a switch tube is used to quickly control the charging and discharging process of the capacitor, and the charging and discharging voltage on the capacitor can be monitored in real time, and the charging and discharging time and voltage are further controlled, thereby effectively simulating the actual application conditions of the capacitor, providing data support for analyzing the failure causes of the capacitor, thereby further improving the performance and life of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a capacitor rapid charge and discharge test circuit in Embodiment 1 of the present utility model;

[0015] Figure 2 It is a structural schematic diagram of a capacitor rapid charge and discharge test circuit in Embodiment 2 of the present utility model. DETAILED DESCRIPTION

[0016] The following is a detailed description of an embodiment of the utility model. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0017] Embodiment 1

[0018] like Figure 1 As shown, this embodiment provides a technical solution: a capacitor fast charge and discharge test circuit, including a charge and discharge control unit 1, a discharge cut-off voltage control unit 2, a main control unit 3, an adjustable DC power supply 4, and a capacitor to be tested 5;

[0019] The positive terminal of the adjustable DC power supply 4 is connected to the positive terminal of the charge and discharge control unit 1, and the negative terminal of the adjustable DC power supply 4 is connected to the negative terminal of the charge and discharge control unit 1 and the second pin of the capacitor 5 to be tested, and is also connected to the negative terminal of the discharge cut-off voltage control unit 2.

[0020] The CX+ terminal of the charge and discharge control unit 1 is connected to the first pin of the capacitor 5 to be tested, and is also connected to the CX+ terminal of the discharge cut-off voltage control unit 2; the Vg1 terminal of the charge and discharge control unit 1 is connected to the Vg1 terminal of the main control unit 3; the Vg2 terminal of the charge and discharge control unit 1 is connected to the Vg2 terminal of the main control unit 3.

[0021] The Vc terminal of the discharge cut-off voltage control unit 2 is connected to the Vc terminal of the main control unit 3 ; the Vt terminal of the discharge cut-off voltage control unit 2 is connected to the Vt terminal of the main control unit 3 .

[0022] In the charge and discharge control unit 1, its positive terminal is connected to the C pin of the switch tube V1, and the G pin of the switch tube V1 is connected to the Vg1 terminal of the charge and discharge control unit 1; the G pin of the switch tube V2 is connected to the Vg2 terminal of the charge and discharge control unit 1, and the E pin of the switch tube V2 is connected to the negative terminal of the charge and discharge control unit 1; the C pin of the switch tube V2 is connected to the E pin of the switch tube V1, and is also connected to the first pin of the diode D1 and the second pin of the diode D2; the second pin of the diode D1 is connected to the first pin of the resistor R1; the first pin of the diode D2 is connected to the first pin of the resistor R2; the second pin of the resistor R1 is connected to the second pin of the resistor R2, and is also connected to the CX+ terminal of the charge and discharge control unit 1.

[0023] In the discharge cut-off voltage control unit 2, its CX+ terminal is connected to the second pin of the resistor R3; the negative terminal of the discharge cut-off voltage control unit 2 is connected to the first pin of the resistor R4; the first pin of the resistor R3 is connected to the second pin of the resistor R4, and is also connected to the third pin of the comparator U1A; the first pin of the comparator U1A is connected to the Vc terminal of the discharge cut-off voltage control unit 2; the second pin of the comparator U1A is connected to the Vt terminal of the discharge cut-off voltage control unit 2.

[0024] The voltage on the capacitor 5 to be tested is obtained by the voltage division of the resistors R3 and R4, and a reference voltage Vt is provided by the main control unit. The two voltages are compared by the operational amplifier U1A to determine whether the voltage of the capacitor 5 to be tested exceeds a set value (i.e., the reference voltage Vt). If it exceeds the set value, the switch tube for controlling charging or discharging in the charge and discharge control unit 1 is turned off, thereby realizing the control of the charging and discharging time.

[0025] Embodiment 2

[0026] like Figure 2 As shown, this embodiment provides a technical solution: a capacitor fast charge and discharge test circuit, including a charge and discharge control unit 1, a discharge cut-off voltage control unit 2, a main control unit 3, an adjustable DC power supply 4, and a capacitor to be tested 5;

[0027] In this embodiment, the positions of the switch tubes V1 and V2 and the diodes D1 and D2 in the charge and discharge control unit 1 are adjusted, which can also achieve the effect of the technical solution in the first embodiment. The rest of the implementation methods are the same as those in the first embodiment.

[0028] In this embodiment, the switch tubes V1 and V2 may be IGBTs or MOSFETs, may have protection diodes inside, or may not have protection diodes, and may use modules or single tubes.

[0029] In summary, the capacitor fast charge and discharge test circuit uses a switch tube to quickly control the charging and discharging process of the capacitor, and can monitor the charging and discharging voltage on the capacitor in real time, and further control the charging and discharging time and voltage, thereby effectively simulating the actual application conditions of the capacitor, and providing data support for analyzing the failure causes of the capacitor, thereby further improving the performance and life of the capacitor.

[0030] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A capacitor rapid charge and discharge test circuit, characterized in that: The invention comprises a charge and discharge control unit, an adjustable DC power supply, a main control unit, a discharge cut-off voltage control unit, and a capacitor to be measured; the adjustable DC power supply is connected to the charge and discharge control unit, the charge and discharge control unit is connected to the capacitor to be measured, the discharge cut-off voltage control unit is connected to the capacitor to be measured, and the main control unit is respectively connected to the charge and discharge control unit and the discharge cut-off voltage control unit, and is used for controlling the charging and discharging process of the capacitor through the charge and discharge control unit, and controlling the discharge cut-off voltage of the capacitor through the discharge cut-off voltage control unit.

2. A capacitor rapid charge and discharge test circuit according to claim 1, characterized in that: The positive terminal of the adjustable DC power supply is connected to the positive terminal of the charge and discharge control unit, and the negative terminal is connected to the negative terminal of the charge and discharge control unit and the second pin of the capacitor to be measured, and is also connected to the negative terminal of the discharge cut-off voltage control unit.

3. A capacitor rapid charge and discharge test circuit according to claim 2, characterized in that: The charge and discharge control unit includes a switch tube V1, a switch tube V2, a diode D1, a diode D2, a resistor R1, and a resistor R2; the positive terminal of the charge and discharge control unit is connected to the C pin of the switch tube V1, and the G pin of the switch tube V1 is connected to the Vg1 terminal of the charge and discharge control unit; the G pin of the switch tube V2 is connected to the Vg2 terminal of the charge and discharge control unit, and the E pin of the switch tube V2 is connected to the negative terminal of the charge and discharge control unit; the C pin of the switch tube V2 is connected to the E pin of the switch tube V1, and is also connected to the first pin of the diode D1 and the second pin of the diode D2; the second pin of the diode D1 is connected to the first pin of the resistor R1; The first pin of the diode D2 is connected to the first pin of the resistor R2; the second pin of the resistor R1 is connected to the second pin of the resistor R2, and is also connected to the CX+ terminal of the charge and discharge control unit.

4. A capacitor rapid charge and discharge test circuit according to claim 3, characterized in that: The resistor R1 is a charging resistor, and the resistor R2 is a discharging resistor.

5. A capacitor rapid charge and discharge test circuit according to claim 4, characterized in that: The switch tubes V1 and V2 are IGBTs or MOSFETs.

6. A capacitor rapid charge and discharge test circuit according to claim 3, characterized in that: The discharge cut-off voltage control unit includes a comparator U1A, a resistor R3, and a resistor R4; the CX+ terminal of the discharge cut-off voltage control unit is connected to the second pin of the resistor R3; the negative terminal of the discharge cut-off voltage control unit is connected to the first pin of the resistor R4; the first pin of the resistor R3 is connected to the second pin of the resistor R4, and is also connected to the third pin of the comparator U1A; the first pin of the comparator U1A is connected to the Vc terminal of the discharge cut-off voltage control unit; The second pin of the comparator U1A is connected to the Vt terminal of the discharge cut-off voltage control unit.

7. A capacitor rapid charge and discharge test circuit according to claim 6, characterized in that: The CX+ terminal of the charge and discharge control unit is connected to the first pin of the capacitor to be measured, and is correspondingly connected to the CX+ terminal of the discharge cut-off voltage control unit; the Vg1 terminal of the charge and discharge control unit is correspondingly connected to the Vg1 terminal of the main control unit, and the Vg2 terminal of the charge and discharge control unit is correspondingly connected to the Vg2 terminal of the main control unit.

8. A capacitor rapid charge and discharge test circuit according to claim 7, characterized in that: The Vc terminal of the discharge cut-off voltage control unit is connected to the Vc terminal of the main control unit correspondingly, and the Vt terminal of the discharge cut-off voltage control unit is connected to the Vt terminal of the main control unit correspondingly.

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