CN109412399B - High-power water-cooling overvoltage protection and energy release device - Google Patents
High-power water-cooling overvoltage protection and energy release device Download PDFInfo
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- CN109412399B CN109412399B CN201811369436.2A CN201811369436A CN109412399B CN 109412399 B CN109412399 B CN 109412399B CN 201811369436 A CN201811369436 A CN 201811369436A CN 109412399 B CN109412399 B CN 109412399B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a high-power water-cooling overvoltage protection and energy release device which comprises a first busbar, a cooling water nozzle, a second busbar, a third busbar, a device shell, an IGBT (insulated gate bipolar transistor) and gate electrode driving circuit, a control circuit and a thin film capacitor, wherein the first busbar, the second busbar and the third busbar are sequentially arranged in the device shell from top to bottom, one side of the first busbar is provided with the IGBT and the gate electrode driving circuit and the control circuit, the rear sides of the IGBT and the gate electrode driving circuit are provided with a water-cooling radiator, the cooling water nozzle is arranged on the water-cooling radiator, one side of the second busbar is provided with the thin film capacitor, and the control circuit comprises a main circuit, a voltage dividing sub-circuit, a comparison circuit for comparing and judging whether the busbar voltage is overvoltage or not, a selection circuit, a second comparison circuit and a gate electrode driving circuit.
Description
Technical Field
The invention relates to the technical field of voltage protection devices, in particular to a high-power water-cooling overvoltage protection and energy release device.
Background
In a high capacity power supply system, especially a switching power supply system with a high capacity energy storage capacitor, it is necessary to limit the highest voltage of a dc bus of the power supply, or to discharge the capacitor energy storage after the power supply is stopped, which requires a device to discharge the excessive energy to limit the highest voltage of the bus and discharge the capacitor energy storage after the power supply is stopped.
Disclosure of Invention
Aiming at the technical problems, the invention provides a high-power water-cooling overvoltage protection and energy release device.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides a high-power water-cooling overvoltage protection and energy discharging device, includes first female row, cooling water nozzle, second female row, third female row, device casing, IGBT and gate pole drive circuit, control circuit, film electric capacity, inside top-down of device casing sets gradually first female row (1), second female row, third female row, first female row one side sets up IGBT and gate pole drive circuit and control circuit, IGBT and gate pole drive circuit rear side are provided with the water-cooling radiator, set up the cooling water nozzle on the water-cooling radiator, second female row one side sets up film electric capacity, control circuit includes main circuit, bleeder circuit, is used for comparing and judges whether the bus voltage is overvoltage comparison circuit, selection circuit, second comparison circuit, gate pole drive circuit, main circuit includes first female row, second female row, third female row, film electric capacity, IGBT V100, IGBT V101, IGBT V102, connect gradually IGBT V100, IGBT V101, IGBT V102 between second female row and the third female row, IGBT V102, the comparison circuit is used for comparing with second voltage and the comparison circuit, the comparison circuit is used for judging whether the comparison circuit is connected with second voltage is connected with the second voltage between IGBT V101 and the second voltage, the comparison circuit.
The voltage divider sub-circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a diode V1 and a rheostat RP1, one end of the resistor R1 is connected with the second busbar, the other end of the resistor R1 is connected with the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the diode V1 and the rheostat RP1 in series, one end of the rheostat RP1 is grounded, and a line between the resistor R5 and the resistor R6 is grounded through a capacitor C1.
The comparison circuit for comparing and judging whether the bus voltage is overvoltage or not comprises a first comparator N1, a resistor R8 and a capacitor C2, wherein the resistor R8 and the capacitor C2 are respectively connected with the first comparator N1 in parallel, the positive electrode of the first comparator N1 is connected with a 10V power supply, the negative electrode of the first comparator N1 is connected with a circuit between the resistor R6 and the resistor R7, and the output electrode of the first comparator N1 is connected with the selection circuit.
The selection circuit comprises a switch K1, a rheostat RP2, a resistor R9 and a resistor R10, wherein one end of the resistor R10 is connected with a 10v power supply and a second comparison circuit respectively, the other end of the resistor R10 is connected with the resistor R9 and the rheostat RP2 in series, the rheostat RP2 is grounded, the switch K1 comprises a contact 1, a contact 2, a contact 4 and a resistor, the resistor is connected to the contact 1, one end of the resistor is grounded, the other end of the resistor is connected with a power supply VCC through a normally-closed contact, the contact 4 is connected with a circuit between the resistor R9 and the resistor R10, the contact 2 is connected with an output electrode of the first comparator N1, and the contact 1 is connected with the second comparison circuit.
The second comparison circuit comprises a second comparator N2, a triode V3 and a triode V4, wherein the positive electrode of the second comparator N2 is connected with the resistor R10, the negative electrode of the second comparator N2 is connected with the contact 1, the output electrode of the second comparator N2 is connected with the triode V3, the triode V4 is connected with the triode V3 in parallel, one end of the triode V3 is connected with the power VCC, one end of the triode V4 is grounded, and the triode V3 and the triode V4 are connected with the gate driving circuit.
The beneficial effects of the invention are as follows:
1. the high-capacity power supply generally uses an electrolytic capacitor as energy storage, but the electrolytic capacitor is very sensitive to overvoltage, if the voltage exceeds the highest limit value of the electrolytic capacitor, serious accidents can occur, so that the bus voltage must be limited, when the bus voltage exceeds a preset value, the excessive energy is discharged, the bus voltage is kept within a safe range, and the mode of using 3 IGBTs to be connected in parallel and a water-cooling radiator is adopted because the larger electric energy is discharged in a shorter time.
2. After the power supply is stopped normally or abnormally, the energy storage capacitor still stores electric energy, and the electric energy stored in the circuit needs to be discharged for safety.
3. Because the energy storage and the energy release cannot exist simultaneously, 2 working processes are integrated together, and the energy storage and the energy release are realized by one device, so that the space and the equipment cost are saved. The device runs completely and automatically in the working process without manual intervention.
Drawings
Fig. 1 is a cross-sectional view of a device housing of the present invention.
Fig. 2 is a schematic diagram of a control circuit.
Fig. 3 is a schematic diagram of the main circuit.
The device comprises a first busbar, a 2-cooling water nozzle, a second busbar, a third busbar, a 5-device shell, a 6-IGBT and gate drive circuit, a 7-control circuit and a thin film capacitor, wherein the first busbar, the 2-cooling water nozzle, the second busbar, the third busbar, the 5-device shell, the 6-IGBT and gate drive circuit, the 7-control circuit and the 8-thin film capacitor.
Detailed Description
As shown in fig. 1 to 3, a high-power water-cooling overvoltage protection and energy release device comprises a first busbar 1, a cooling water nozzle 2, a second busbar 3, a third busbar 4, a device shell 5, an IGBT and gate drive circuit 6, a control circuit 7 and a thin film capacitor 8, wherein the first busbar 1, the second busbar 3 and the third busbar 4 are sequentially arranged in the device shell 5 from top to bottom, one side of the first busbar 1 is provided with the IGBT and gate drive circuit 6 and the control circuit 7, the rear side of the IGBT and gate drive circuit 6 is provided with a water-cooling radiator, the cooling water nozzle 2 is arranged on the water-cooling radiator, one side of the second busbar 3 is provided with the thin film capacitor 8, the control circuit 7 comprises a main loop circuit, a voltage divider circuit, a comparison circuit for comparing and judging whether the busbar voltage is overvoltage or not, a selection circuit, a second comparison circuit and a gate drive circuit, the main loop circuit comprises a first busbar 1, a second busbar 3, a third busbar 4, a thin film capacitor 8, an IGBT V100, an IGBT V101 and an IGBT V102, wherein the IGBT V100, the IGBT V101, the IGBT V102 and the thin film capacitor 8 are sequentially connected between the second busbar 3 and the third busbar 4, one end of the first busbar 1 is connected with the second busbar 3 through a resistor R, the other end of the first busbar 1 is connected with the IGBT V100, the IGBT V101 and the IGBT V102 in series, the voltage divider circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a diode V1 and a resistor RP1, one end of the resistor R1 is connected with the second busbar 3, the other end of the resistor R3, the resistor R4, a resistor R5, a resistor R6, a resistor R7, a diode V1 and a resistor RP1 are connected in series, one end of the resistor RP1 is grounded, a resistor R5 and a resistor R6 is grounded through a circuit between the resistor R6 and the resistor C1, the comparison circuit for comparing and judging whether the bus voltage is overvoltage or not comprises a first comparator N1, a resistor R8 and a capacitor C2, wherein the resistor R8 and the capacitor C2 are respectively connected with the first comparator N1 in parallel, the anode of the first comparator N1 is connected with a 10V power supply, the cathode of the first comparator N1 is connected with a circuit between the resistor R6 and the resistor R7, the output electrode of the first comparator N1 is connected with the selection circuit, the selection circuit comprises a switch K1, a rheostat RP2, a resistor R9 and a resistor R10, one end of the resistor R10 is respectively connected with the 10V power supply and the second comparison circuit, the other end of the resistor R10 is connected with the resistor R9 and the rheostat RP2 in series, the rheostat RP2 is grounded, the switch K1 comprises a contact 1, a contact 2, a contact 4 and a resistor, the contact 1 is connected with a resistor, one end of the resistor is grounded, the other end of the resistor is connected with a power VCC through a normally closed contact, the contact 4 is connected with a circuit between the resistor R9 and the resistor R10, the contact 2 is connected with an output pole of the first comparator N1, the contact 1 is connected with a second comparison circuit, the second comparison circuit comprises a second comparator N2, a triode V3 and a triode V4, a positive pole of the second comparator N2 is connected with the resistor R10, a negative pole of the second comparator N2 is connected with the contact 1, an output pole of the second comparator N2 is connected with the triode V3, a triode V4 is connected on the triode V3 in parallel, one end of the triode V3 is connected with the power VCC, one end of the triode V4 is grounded, and the triode V3 and the triode V4 are connected with a gate driving circuit.
When the invention is used, the working state of the circuit is divided into 2 kinds, namely an energy release state and an overvoltage protection state. Before the main circuit of the power supply is switched on (a judging signal is input through Q), the normally open point of K1 is attracted, the contact 1 of K1 receives the electric signal of the contact 4, and the device is in an energy release state at the moment; after the main circuit of the power supply is switched on (a judging signal is input through Q), the normally closed point of K1 is reset, the contact 1 of K1 receives the electric signal of the contact 2, and the device is in an overvoltage protection state.
Overvoltage protection state: C/L+ is the positive pole of the power bus voltage, the voltage is divided by R1-R7, the voltage is taken from R7 and sent to the "-" end of N1, whether the bus voltage is over-voltage is judged by comparing the voltage with the "+" end voltage of N1, RP1 is a trimming potentiometer, N1, R8 and C6 form a circuit, when the voltage at R7 is higher than 10V, N1 output is reversed, the reversed voltage is sent to a comparator N2 and N2 output corresponding PWM through a contact 1 and a contact 2 of K1 and sent to a gate driving circuit, the gate driving circuit directly drives IGBT V100-V102 in FIG. 2, and the overvoltage threshold can be trimmed through RP 1.
Energy release state: at this time, the normally open point of K1 is attracted, the contact 1 of K1 receives the electric signal of contact 4, R10, R9 and RP2 form a voltage dividing circuit, the divided voltage is sent to the comparator N2 through the contact 4 and contact 1 of K1, N2 outputs corresponding PWM and is sent to the gate driving circuit, and the gate driving circuit directly drives the IGBTs V100-V102 in FIG. 2.
Claims (1)
1. The utility model provides a high-power water-cooling overvoltage protection and let out can device which characterized in that: including first female row (1), cooling water injection well choke (2), second female row (3), third female row (4), device casing (5), IGBT and gate drive circuit (6), control circuit (7), film electric capacity (8), inside top-down of device casing (5) sets gradually first female row (1), second female row (3), third female row (4), first female row (1) one side sets up IGBT and gate drive circuit (6) and control circuit (7), IGBT and gate drive circuit (6) rear side is provided with the water-cooling radiator, set up cooling water injection well choke (2) on the water-cooling radiator, second female row (3) one side sets up film electric capacity (8), control circuit (7) include main loop circuit, divider circuit, be used for comparing and judge whether bus voltage overvoltage comparison circuit, select circuit, second comparison circuit, gate drive circuit, main loop circuit includes first female row (1), second female row (3), third female row (4), film electric capacity (8), IGBT V100, IGBT V101V, V102, IGBT (102) are connected with first IGBT, third IGBT (3) one side is connected with the film electric capacity (101) in proper order, the other end of the first busbar (1) is connected with the IGBT V100, the IGBT V101 and the IGBT V102 in series, the voltage divider circuit is connected with the second busbar (3) and a comparison circuit for comparing and judging whether the busbar voltage is over-voltage, the comparison circuit for comparing and judging whether the busbar voltage is over-voltage is connected with a selection circuit, the selection circuit is connected with a second comparison circuit, and the second comparison circuit is connected with a gate driving circuit;
the comparison circuit for comparing and judging whether the bus voltage is over-voltage comprises a first comparator N1, a resistor R8 and a capacitor C2, wherein the resistor R8 and the capacitor C2 are respectively connected with the first comparator N1 in parallel, the positive electrode of the first comparator N1 is connected with a 10V power supply, the negative electrode of the first comparator N1 is connected with the voltage divider circuit, and the output electrode of the first comparator N1 is connected with the selection circuit;
the voltage divider circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a diode V1 and a rheostat RP1, one end of the resistor R1 is connected with the second busbar (3), the other end of the resistor R1 is connected with the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the diode V1 and the rheostat RP1 in series, one end of the rheostat RP1 is grounded, a line between the resistor R5 and the resistor R6 is grounded through a capacitor C1, and a line between the resistor R6 and the resistor R7 is connected with the cathode of the first comparator N1;
the selection circuit comprises a switch K1, a rheostat RP2, a resistor R9 and a resistor R10, wherein one end of the resistor R10 is respectively connected with a 10v power supply and a second comparison circuit, the other end of the resistor R10 is connected with the resistor R9 and the rheostat RP2 in series, the rheostat RP2 is grounded, the switch K1 comprises a contact 1, a contact 2, a contact 4 and a resistor, the resistor is connected to the contact 1, one end of the resistor is grounded, the other end of the resistor is connected with a power supply VCC through a normally-closed contact, the contact 4 is connected with a circuit between the resistor R9 and the resistor R10, the contact 2 is connected with an output electrode of the first comparator N1, and the contact 1 is connected with the second comparison circuit;
the second comparison circuit comprises a second comparator N2, a triode V3 and a triode V4, wherein the positive electrode of the second comparator N2 is connected with the resistor R10, the negative electrode of the second comparator N2 is connected with the contact 1, the output electrode of the second comparator N2 is connected with the triode V3, the triode V4 is connected in parallel on the triode V3, one end of the triode V3 is connected with a power VCC, one end of the triode V4 is grounded, and the triode V3 and the triode V4 are both connected with the gate driving circuit;
the working states of the circuit are divided into 2 types, namely an energy release state and an overvoltage protection state; before the main circuit of the power supply is switched on, judging that a signal is input through Q, the normally open point of K1 is attracted, the contact 1 of K1 receives the electric signal of the contact 4, and the device is in an energy release state at the moment; after the main circuit of the power supply is switched on, judging signals are input through Q, the normally closed point of K1 is reset, the contact 1 of K1 receives the electric signals of the contact 2, and the device is in an overvoltage protection state at the moment;
overvoltage protection state: C/L+ is the positive pole of the bus voltage of the power supply, the voltage is divided by R1-R7, the voltage is taken from R7 and sent to the negative pole end of the first comparator N1, whether the bus voltage is over-voltage is judged by comparing the voltage with the positive pole end voltage of the first comparator N1, RP1 is a trimming potentiometer, N1, R8 and C6 form a circuit, when the voltage at R7 is higher than 10V, N1 output is reversed, the reversed voltage is sent to the second comparator N2 and N2 output corresponding PWM to the gate driving circuit through the contact 1 and the contact 2 of K1, the gate driving circuit directly drives IGBT V100-V102, and the overvoltage threshold value can be trimmed through RP 1;
energy release state: at the moment, a normally open point of K1 is attracted, a contact 1 of K1 receives an electric signal of a contact 4, R10, R9 and RP2 form a voltage dividing circuit, the divided voltage is sent to a second comparator N2 and N2 through the contact 4 and the contact 1 of K1, corresponding PWM is output to be sent to a gate driving circuit, and the gate driving circuit directly drives IGBT V100-V102.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811369436.2A CN109412399B (en) | 2018-11-16 | 2018-11-16 | High-power water-cooling overvoltage protection and energy release device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811369436.2A CN109412399B (en) | 2018-11-16 | 2018-11-16 | High-power water-cooling overvoltage protection and energy release device |
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| CN109412399A CN109412399A (en) | 2019-03-01 |
| CN109412399B true CN109412399B (en) | 2024-03-15 |
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| CN201811369436.2A Active CN109412399B (en) | 2018-11-16 | 2018-11-16 | High-power water-cooling overvoltage protection and energy release device |
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| CN110098719B (en) * | 2019-06-14 | 2024-07-30 | 山西恒信风光新能源技术有限公司 | Wind power plant frequency converter power cabinet based on separated insulated gate bipolar IGBT driving structure |
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