Capacitor charging and discharging module

Abstract

The invention discloses a capacitor charging and discharging module, and relates to the technical field of capacitor rapid charging and discharging circulation. Comprising an IGBT1, an IGBT2, a first resistor string and a second resistor string, the first resistor string comprises a plurality of first charge and discharge resistors which are connected in sequence, the second resistor string comprises a plurality of second charge and discharge resistors which are connected in sequence, one end of the first resistor string is a power supply anode input end, the other end of the first resistor string is connected with a C electrode of the IGBT1, an E electrode of the IGBT1 is an output end anode and is connected with a C electrode of the IGBT2, and the other end of the first resistor string is connected with a C electrode of the IGBT2. The E electrode of the IGBT2 is connected with one end of the second resistor string, and the other end of the second resistor string is connected with the power supply negative electrode input end and serves as an output end negative electrode. According to the invention, through reasonable distribution of resistance values, continuous adjustment of charging and discharging resistance in a certain range is realized; according to the invention, through a contactless switch (IGBT), faster charging and discharging time control is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitor rapid charge and discharge cycles, and in particular to a capacitor charge and discharge module. Background Art

[0002] The charge and discharge performance test of capacitors is an important part of evaluating their performance, stability and reliability. As a key component in the circuit, the charge and discharge performance of capacitors directly affects the overall performance of the circuit. In order to comprehensively and accurately test the charge and discharge performance of capacitors, capacitor charge and discharge equipment is required to perform capacitor charge and discharge tests.

[0003] During the fast charge and discharge cycle test of capacitors, a time constant needs to be met. Capacitors of different specifications need to use different charge and discharge resistors to achieve this charge and discharge time constant. The old solution requires manual adjustment of the resistor value each time charging and discharging to match the charge and discharge time constants of different capacitor specifications. Summary of the invention

[0004] The purpose of the present invention is to provide a capacitor charging and discharging module, which can effectively solve the problems in the background technology.

[0005] The technical solution to achieve the above purpose is: a capacitor charging and discharging module, which is used to select resistors with different resistance values ​​in series according to different charging resistance values ​​and discharging resistance values; characterized in that: it includes IGBT1, IGBT2, a first resistor string, and a second resistor string, the first resistor string includes a plurality of first charging and discharging resistors connected in sequence, the second resistor string includes a plurality of second charging and discharging resistors connected in sequence, one end of the first resistor string is the positive input terminal of the power supply, the other end of the first resistor string is connected to the C pole of IGBT1, the E pole of IGBT1 is the positive output terminal and is connected to the C pole of IGBT2, the E pole of IGBT2 is connected to one end of the second resistor string, and the other end of the second resistor string is the negative input terminal of the power supply and serves as the negative output terminal; The first resistor string is R n -1. R n -2. R n -4. R n -8, R (n+1) -1, R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8; R n -1. R n -2. R n -4. R n -8, R(n+1) -1, R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8 corresponding resistance value is 1*10 n Ω、2*10 n Ω、4*10 n Ω、8*10 n Ω、1*10 n+1 Ω、2*10 n+1 Ω、4*10 n+1 Ω、8*10 n+1 Ω……1*10 n+m Ω、2*10 n+m Ω、4*10 n+m Ω、8*10 n+m Ω; R n -1. R n -2. R n -4. R n -8. R (n+1) -1, R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8 corresponds to the contactor J in parallel n -1, J n -2, J n -4, J n -8, J (n+1) -1, J (n+1) -2, J (n+1) -4, J (n+1) -8……J (n+ m) -1, J (n+ m) -2, J (n+ m) -4, J (n+ m) -8 normally open contacts; The second resistor string is R a -1. R a -2. R a -4. R a -8, R (a+1) -1, R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1, R (a+ b)-2. R (a+ b) -4. R (a+ b) -8; R a -1. R a -2. R a -4. R a -8, R (a+1) -1, R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1, R (a+ b) -2. R (a+ b) -4. R (a+ b) -8 corresponding resistance value is 1*10 a Ω、2*10 a Ω、4*10 a Ω、8*10 a Ω、1*10 a+1 Ω、2*10 a+1 Ω、4*10 a+1 Ω、8*10 a+1 Ω……1*10 a+b Ω、2*10 a+ b Ω、4*10 a+ b Ω、8*10 a+ b Ω; R a -1. R a -2. R a -4. R a -8, R (a+1) -1, R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1. R (a+ b) -2. R (a+ b) -4. R (a+ b) -8; corresponding to the contactor J in parallel a -1, J a -2, J a -4, J a -8, J (a +1) -1, J (a +1) -2, J (a +1) -4, J (a +1) -8……J (a+ b) -1, J (a+ b) -2, J (a + b) -4, J (a+ b)-8 normally open contacts; Among them, n and a are integers, and m and b are positive integers.

[0006] Furthermore, the resistance values ​​of the charging resistor and the discharging resistor are set to be x and y respectively, the number of digits of the integer part and the number of digits after the decimal point of x are p and q respectively, the number of digits of the integer part and the number of digits after the decimal point of y are s and t respectively, then n=-q, a=-t, m=p+q-1, b=s+t-1, if x and y are integers, then q and t are both 0.

[0007] The achievable beneficial effects of the present invention are: The present invention realizes continuous adjustment of charging and discharging resistance within a certain range by reasonably allocating resistance values; the present invention realizes faster charging and discharging time control by using a contactless switch (IGBT). BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A circuit diagram of the present invention; Figure 2 for Figure 1 Enlarged view of part A in the middle; Figure 3 for Figure 1 Enlarged view of middle part B; Figure 4 for Figure 1 Enlarged view of the middle C part; Figure 5 for Figure 1 Enlarged view of the middle D part; Figure 6 This is a working principle diagram of the present invention. DETAILED DESCRIPTION

[0009] like Figure 1-5 As shown, the present invention discloses a capacitor charging and discharging module 1, including IGBT1, IGBT2, a first resistor string, and a second resistor string, wherein the first resistor string includes a plurality of first charging and discharging resistors connected in sequence, and the second resistor string includes a plurality of second charging and discharging resistors connected in sequence, one end of the first resistor string is a positive input terminal of a power supply, the other end of the first resistor string is connected to the C pole of IGBT1, the E pole of IGBT1 is a positive output terminal and is connected to the C pole of IGBT2, the E pole of IGBT2 is connected to one end of the second resistor string, and the other end of the second resistor string is a negative input terminal of a power supply and serves as a negative output terminal; The first resistor string is R n -1. R n -2. R n -4. R n -8, R (n+1) -1, R (n+1) -2. R (n+1) -4. R(n+1) -8……R (n+ m) -1. R (n+ m) -2. R (n+ m) -4. R (n+ m) -8; R n -1. R n -2. R n -4. R n -8, R (n+1) -1. R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8 corresponding resistance value is 1*10 n Ω、2*10 n Ω、4*10 n Ω、8*10 n Ω、1*10 n+1 Ω、2*10 n+1 Ω、4*10 n+1 Ω、8*10 n+1 Ω……1*10 n+m Ω、2*10 n+m Ω、4*10 n+m Ω、8*10 n+m Ω; R n -1. R n -2. R n -4. R n -8, R (n+1) -1. R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8 corresponds to the contactor J in parallel n -1, J n -2, J n -4, J n -8, J (n+1) -1, J (n+1) -2, J (n+1) -4, J (n+1) -8……J (n+ m) -1, J (n+ m) -2, J (n+ m) -4, J (n+ m) -8 normally open contacts; The second resistor string is Ra -1. R a -2. R a -4. R a -8, R (a+1) -1. R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1, R (a+ b) -2. R (a+ b) -4. R (a+ b) -8; R a -1. R a -2. R a -4. R a -8, R (a+1) -1. R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1, R (a+ b) -2. R (a+ b) -4. R (a+ b) -8 corresponding resistance value is 1*10 a Ω、2*10 a Ω、4*10 a Ω、8*10 a Ω、1*10 a+1 Ω、2*10 a+1 Ω、4*10 a+1 Ω、8*10 a+1 Ω……1*10 a+b Ω、2*10 a+ b Ω、4*10 a+ b Ω、8*10 a+ b Ω; R a -1. R a -2. R a -4. R a -8, R (a+1) -1. R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1, R (a+ b) -2. R (a+ b) -4. R (a+ b) -8; corresponding to the contactor J in parallel a -1, J a -2, Ja -4, J a -8, J (a +1) -1, J (a +1) -2, J (a +1) -4, J (a +1) -8……J (a+ b) -1, J (a+ b) -2, J (a + b) -4, J (a+ b) -8 normally open contacts; Among them, n and a are integers, and m and b are positive integers.

[0010] Set the charging resistance and discharging resistance to x and y respectively, the integer part of x and the number of digits after the decimal point are p and q respectively, the integer part of y and the number of digits after the decimal point are s and t respectively, then n=-q, a=-t, m=p+q-1, b=s+t-1, if x and y are integers, then q and t are both 0.

[0011] like Figure 6 As shown, the present invention is connected to the charge and discharge module control circuit when working, and the charge and discharge module control circuit includes a high-precision switching power supply 2, a single-chip computer 3, and a high-precision switching power supply control circuit 4. The positive power input terminal and the negative power input terminal of the capacitor charge and discharge module 1 are connected to the output terminal of the high-precision switching power supply 2.

[0012] Contactor J n -1, J n -2, J n -4, J n -8, J (n+1) -1, J (n+1) -2, J (n+1) -4, J (n+1) -8……J (n+ m) -1, J (n+ m) -2, J (n+ m) -4, J (n+ m) -8, J a -1, J a -2, J a -4, J a -8, J (a +1) -1, J (a +1) -2, J (a +1) -4, J (a +1) -8……J (a+ b) -1, J (a+ b) -2, J (a + b) -4, J (a+ b)The coils of -8 are connected to the single-chip computer 3 through the contactor control circuit 5, the G poles of IGBT1 and IGBT2 are connected to the single-chip computer 3 through the IGBT control circuit 6, the control end of the high-precision switching power supply 2 is connected to the single-chip computer 3 through the high-precision switching power supply control circuit 4, the single-chip computer 3 is also correspondingly connected to the industrial computer 7, the industrial computer 7 is connected to the display 8, the measured capacitor 9 is connected to the output end of the capacitor charging and discharging module 1, and both ends of the measured capacitor 9 are connected to the signal input end of the single-chip computer 3 through the voltage sampling circuit 10, and the voltage of the measured capacitor 9 is collected.

[0013] When working, the single chip computer 3 first sends a control signal to the control charging and discharging module to select a suitable charging and discharging resistor.

[0014] For example: Set the charging resistance to 47.38Ω and the discharging resistance to 9631Ω, then n=-2, a=0, m=3, b=3, then R -2 -1 (R n -1)、R -2 -2 (R n -2)、R2-4(R n -4) R -2 -8 (R n -8)、R-1-1(R (n+1) -1)、R-1-2(R (n+1) -2)、R-1-4(R (n+1) -4)、R-1-8(R (n+1) -8), R0-1 (R (n+2) -1)、R0-2(R (n+2) -2), R0-4 (R (n+2) -4)、R0-8(R (n+2) -4)、R1-1(R (n+ m) -1)、R1-2(R (n+ m) -2)、R1-4(R (n+ m) -4)、R1-8(R (n+ m) -8) The resistance values ​​are: 0.01Ω, 0.02Ω, 0.04Ω, 0.08Ω, 0.1Ω, 0.2Ω, 0.4Ω, 0.8Ω, 1Ω, 2Ω, 4Ω, 8Ω, 10Ω, 20Ω, 40Ω, 80Ω; R0-1 (R a -1)、R0-2(R a -2), R0-4 (R a -4)、R0-8(R a -8)、R1-1(R (a+1) -1)、R1-2(R (a+1) -2)、R1-4(R (a+1) -4)、R1-8(R(a+1) -8)、R2-1(R (a+2) -1)、R2-2(R (a+2) -2)、R2-4(R (a+2) -4)、R2-8(R (a+2) -8)、R3-1(R (a+ b) -1)、R3-2(R (a+ b) -2)、R3-4(R (a+ b) -4)、R3-8(R (a+ b) -8) The resistance values ​​are: 1Ω, 2Ω, 4Ω, 8Ω, 10Ω, 20Ω, 40Ω, 80Ω, 100Ω, 200Ω, 400Ω, 800Ω, 1000Ω, 2000Ω, 4000Ω, 8000Ω; At this time, the resistance values ​​of the charging resistors are 40Ω, 4Ω, 2Ω, 1Ω, 0.2Ω, 0.1Ω, and 0.08Ω. (n+ m) -4 corresponds to contactor J (n+ m) -4. R (n+2) -4 corresponds to contactor J (n+2) -4. R (n+2) -2 corresponds to contactor J (n+2) -2. R (n+2) -1 corresponds to contactor J (n+2) -1. R (n+1) -2 corresponds to contactor J (n+1) -2. R (n+1) -1 corresponds to contactor J (n+1) -1. R n -8 corresponds to contactor J n The other resistors except -8 correspond to the contactor, and a charging resistance of 47.38Ω can be obtained.

[0015] At this time, the resistance values ​​of the discharge resistors are 8000Ω, 1000Ω, 400Ω, 200Ω, 20Ω, 10Ω, and 1Ω. (a+ b) -8 corresponds to contactor J (a+ b) -8, R (a+ b) -1 corresponds to contactor J (a+ b) -1. R (a+2) -4 corresponds to contactor J (a+2) -4. R (a+2) -2 corresponds to contactor J (a+2) -2. R (a+1) -2 corresponds to contactor J (a+1) -2. R (a +1) -1 corresponds to contactor J (a +1) -1. R a -1 corresponds to contactor J aIf the other resistors except -1 correspond to the contactor, the set discharge resistance can be 9631Ω.

[0016] It can be seen from the above example that the contactor that needs a resistor to be disconnected and the contactor that does not need a resistor to be connected in parallel can be closed to achieve arbitrarily adjustable resistance within the range.

[0017] The single-chip microcomputer sends a control signal to the high-precision switching power supply control circuit, causing it to output a stable DC signal. The high-precision switching power supply feedback signal is fed back to the single-chip microcomputer, communicates with the industrial computer, and is transmitted to the display for display.

[0018] The single-chip microcomputer cyclically controls the on and off of IGBT1 and IGBT2 of the charge and discharge module to realize the cyclic test of capacitor charge and discharge. When IGBT1 is turned on, IGBT2 is turned off, and when IGBT2 is turned on, IGBT1 is turned off. This cycle realizes the cyclic test of capacitor charge and discharge, and at the same time feeds back the signal to the single-chip microcomputer, which communicates with the industrial computer and transmits it to the display to display the data and graphics of capacitor charge and discharge.

Claims

1. A capacitor charging and discharging module, used to select resistors of different resistance values ​​in series according to different charging resistance values ​​and discharging resistance values; characterized in that: The invention comprises IGBT1, IGBT2, a first resistor string and a second resistor string, wherein the first resistor string comprises a plurality of first charge-discharge resistors connected in sequence, the second resistor string comprises a plurality of second charge-discharge resistors connected in sequence, one end of the first resistor string is a positive input terminal of a power supply, the other end of the first resistor string is connected to the C pole of IGBT1, the E pole of IGBT1 is a positive output terminal and is connected to the C pole of IGBT2, the E pole of IGBT2 is connected to one end of the second resistor string, the other end of the second resistor string is a negative input terminal of a power supply and serves as a negative output terminal; the first resistor string is R n -1. R n -2. R n -4. R n -8, R (n+1) -1. R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8; R n -1、R n -2、R n -4、R n -8、R (n+1) -1、 R (n+1) -2、R (n+1) -4、R (n+1) -8……R (n+ m) -1、 R (n+ m) -2、R (n+ m) -4、R (n+ m) -8 corresponds to 1*10 n Ohm、2*10 n Oh, 4*10 n Oh, 8*10 n Ohm、1*10 n+1 Ohm、2*10 n+1 Oh, 4*10 n+1 Oh, 8*10 n+1 Oh……1*10 n+m Ohm、2*10 n+m Oh, 4*10 n+m Oh, 8*10 n+m Oh; R n -1. R n -2. R n -4. R n -8, R (n+1) -1, R (n+1) -2. R (n+1) -4. R (n+1) -8……R (n+ m) -1, R (n+ m) -2. R (n+ m) -4. R (n+ m) -8 corresponds to the contactor J in parallel n -1, J n -2, J n -4, J n -8, J (n+1) -1, J (n+1) -2, J (n+1) -4, J (n+1) -8……J (n+ m) -1, J (n+ m) -2, J (n+ m) -4, J (n+ m) -8 normally open contacts; The second resistor string is R a -1. R a -2. R a -4. R a -8, R (a+1) -1, R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1, R (a+ b) -2. R (a+ b) -4. R (a+ b) -8; R a -1、R a -2、R a -4、R a -8、R (a+1) -1、 R (a+1) -2、R (a+1) -4、R (a+1) -8……R (a+ b) -1、 R (a+ b) -2、R (a+ b) -4、R (a+ b) -8 corresponds to 1*10 a Ohm、2*10 a Oh, 4*10 a Oh, 8*10 a Ohm、1*10 a+1 Ohm、2*10 a +1 Oh, 4*10 a+1 Oh, 8*10 a+1 Oh……1*10 a+b Ohm、2*10 a+b Oh, 4*10 a+b Oh, 8*10 a+b Oh; R a -1. R a -2. R a -4. R a -8, R (a+1) -1, R (a+1) -2. R (a+1) -4. R (a+1) -8……R (a+ b) -1. R (a+ b) -2. R (a+ b) -4. R (a+ b) -8; corresponding to the contactor J in parallel a -1, J a -2, J a -4, J a -8, J (a +1) -1, J (a +1) -2, J (a +1) -4, J (a +1) -8……J (a+ b) -1, J (a+ b) -2, J (a + b) -4, J (a+ b) -8 normally open contacts; Among them, n and a are integers, and m and b are positive integers.

2. A capacitor charging and discharging module according to claim 1, characterized in that: Set the charging resistance and discharging resistance to x and y respectively, the integer part of x and the number of digits after the decimal point are p and q respectively, the integer part of y and the number of digits after the decimal point are s and t respectively, then n=-q, a=-t, m=p+q-1, b=s+t-1, if x and y are integers, then q and t are both 0.

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