CN210536509U - Redundant trigger circuit with state feedback function - Google Patents
Redundant trigger circuit with state feedback function Download PDFInfo
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Abstract
A redundant trigger circuit with a state feedback function comprises a first switch power supply, a second switch power supply, a trigger circuit, a full-control switch device, a redundant trigger circuit, a first feedback optical fiber, a second feedback optical fiber and an optical fiber driving circuit. The circuit also comprises a unit voltage sampling circuit and a hardware overvoltage detection circuit. According to the redundant trigger circuit with the state feedback function, a redundant power supply, a trigger circuit, a state feedback circuit and the like are added on the basis of the traditional design, and when any one of a bypass trigger circuit, a power supply, a trigger optical fiber or a feedback optical fiber configured in the traditional circuit fails, a bypass command can be continuously executed and the bypass state can be fed back, so that the reliable operation of equipment is guaranteed.
Description
Technical Field
The utility model relates to a power electronic technology field, in particular to redundant trigger circuit who contains state feedback function.
Background
The bridge arm of the MMC flexible direct-current transmission converter valve, the cascaded reactive power compensation device, the cascaded active filter device, the inversion unit of the cascaded high-voltage frequency conversion device and the main loop structure of the chopping unit of the cascaded direct-current power supply device are all formed by connecting a plurality of power units in series, and when a power module breaks down, the power module can be reliably bypassed, so that the continuous operation of equipment is guaranteed. At present, only one set of bypass trigger circuit, one set of power supply and one set of bypass trigger and feedback optical fibers are configured, before a bypass contactor is closed, the circuit has no state feedback, the working state of the bypass trigger circuit is unknown, and when any one of the bypass trigger circuit, the power supply, the trigger optical fibers or the feedback optical fibers breaks down, the condition that bypass contact fails is caused, so that the integral tripping and stopping of equipment are caused, and the reliability is to be improved.
Disclosure of Invention
In order to solve the problems in the background art, the utility model provides a redundant trigger circuit who contains state feedback function. According to the redundant trigger circuit with the state feedback function, a redundant power supply, a trigger circuit, a state feedback circuit and the like are added on the basis of the traditional design, and when any one of a bypass trigger circuit, a power supply, a trigger optical fiber or a feedback optical fiber configured in the traditional circuit fails, a bypass command can be continuously executed and the bypass state can be fed back, so that the reliable operation of equipment is guaranteed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a redundant trigger circuit with a state feedback function comprises a first switch power supply, a second switch power supply, a trigger circuit, a full-control switch device, a redundant trigger circuit, a first feedback optical fiber, a second feedback optical fiber and an optical fiber driving circuit.
The first switch power supply and the trigger circuit are powered by a basic power supply, and the second switch power supply and the redundant trigger circuit are powered by a redundant power supply; the output end of the first switching power supply and the output end of the second switching power supply provide two paths of redundant power supplies for the optical fiber driving circuit.
The input end of the trigger circuit is connected with an external first optical fiber trigger signal, the input end of the redundant trigger circuit is connected with an external second optical fiber trigger signal, and the output ends of the trigger circuit and the redundant trigger circuit are both connected with coils of the bypass contactor.
The signal input end of the optical fiber driving circuit is connected with the state signal output ends of the trigger circuit and the redundant trigger circuit, and the signal output end of the optical fiber driving circuit is connected with the control end of the full-control switch device.
The lower end of the full-control switch device is grounded together with one end of the auxiliary contact of the bypass contactor, the upper end of the full-control switch device is connected with the other end of the auxiliary contact of the bypass contactor and then is a signal output end of the full-control switch device, and the control end of the full-control switch device is connected with a signal output end of the optical fiber driving circuit.
One end of a power supply of the first feedback optical fiber is connected with a first switching power supply, one end of a power supply of the second feedback optical fiber is connected with a second switching power supply, and the other ends of the power supplies of the first feedback optical fiber and the second feedback optical fiber are connected to the signal output end of the full-control switching device together; the signal output end of the first feedback optical fiber is a first feedback signal end; the signal output end of the second feedback optical fiber is a second feedback signal end.
Furthermore, the trigger circuit includes a first energy storage capacitor, a first voltage divider resistor, a first hysteresis comparator, a first isolation driving circuit and a first controllable switch device, a high-voltage power supply end of the trigger circuit is a basic power supply, a low-voltage power supply end is a first switch power supply, the high-voltage power supply end is grounded via the first energy storage capacitor, a first optical fiber trigger signal is connected to an input end of the first isolation driving circuit, an output end of the first isolation driving circuit is connected to a trigger control end of the first controllable device, the upper end of the first controllable switch device is connected to the high-voltage power supply end, and the lower end of the first controllable switch device is an output end of the trigger circuit and is connected to a coil of the bypass contactor. In the trigger circuit, the upper end of a first voltage-dividing resistor is connected with a high-voltage power supply end, and a voltage-dividing output end outputs a first energy-storage state signal through a first hysteresis comparator and sends the first energy-storage state signal to an optical fiber driving circuit.
Furthermore, the redundant trigger circuit comprises a second energy storage capacitor, a second voltage-dividing resistor, a second hysteresis comparator, a second isolation driving circuit and a second controllable switch device, a high-voltage power supply end of the redundant trigger circuit is a redundant power supply, a low-voltage power supply end is a second switch power supply, the high-voltage power supply end is grounded through the second energy storage capacitor, a second optical fiber trigger signal is connected to the input end of the second isolation driving circuit, the output end of the second isolation driving circuit is connected with a trigger control end of the second controllable device, the upper end of the second controllable switch device is connected with the high-voltage power supply end, and the lower end of the second controllable switch device is the output end of the redundant trigger circuit and is connected to a coil of the bypass contactor. In the redundant trigger circuit, the upper end of a second voltage-dividing resistor is connected with a high-voltage power supply end, and a voltage-dividing output end outputs a second energy-storage state signal through a second hysteresis comparator and sends the second energy-storage state signal to the optical fiber drive circuit.
The redundancy trigger circuit comprises a unit voltage sampling circuit and a hardware overvoltage detection circuit, wherein the input end of the redundancy trigger circuit is also connected with the hardware overvoltage detection circuit; the input end of the hardware overvoltage detection circuit is connected with the voltage output end of the unit voltage sampling circuit, and the output end of the hardware overvoltage detection circuit is connected with the input end of the redundancy trigger circuit.
The overvoltage trigger signal output by the hardware overvoltage detection circuit and the second optical fiber trigger signal are connected to the input end of the second isolation driving circuit of the redundancy trigger circuit in parallel.
The hardware overvoltage detection circuit comprises a third hysteresis comparator and a third voltage division resistor, the input end of the third voltage division resistor is the input end of the hardware overvoltage detection circuit, the voltage division output end of the third voltage division resistor is connected with the third hysteresis comparator, and the output end of the third hysteresis comparator is the output end of the hardware overvoltage detection circuit.
The input end signal of the unit voltage sampling circuit is taken from the main circuit voltage end of the equipment, and the unit voltage sampling circuit is a proportional operation circuit. The voltage end of the main circuit of the equipment is the positive end of a parallel capacitor in the power unit with the bridge structure. The output end of the unit voltage sampling circuit is also connected to the input end of the optical fiber driving circuit.
Furthermore, the optical fiber driving circuit comprises a master control MCU, a power supply end of the master control MCU is respectively connected with the first switching power supply and the second switching power supply through two reversely butted diodes, an input port of the master control MCU is connected with state signal output ends of the trigger circuit and the redundant trigger circuit, and an output port of the master control MCU is connected to a driving control end of the full-control switching device.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model provides a pair of redundant trigger circuit who contains state feedback function adopts power supply and redundant power supply to supply power simultaneously, and the reliability is high.
2) The utility model provides a pair of redundant trigger circuit who contains state feedback function has set up unit voltage sampling circuit and hardware overvoltage detection circuit in addition at redundant trigger circuit's trigger end, can trigger when the hardware is excessive pressure, does not rely on outside optic fibre trigger signal.
3) The utility model provides a pair of redundant trigger circuit who contains state feedback function has adopted optic fibre drive circuit, can feed back a plurality of state information unification of redundant trigger circuit, unit sampling, through the break-make of controlling the full-controlled switch device, sends a plurality of state information to the main control system of equipment, makes things convenient for system identification.
4) The utility model provides a redundant trigger circuit who contains state feedback function adopts two optical fiber to trigger to and the form of two optical fiber feedback, cross trigger, cross feedback for between the power unit provide the hardware basis, use in a flexible way.
Drawings
Fig. 1 is a topological block diagram of a redundant trigger circuit including a state feedback function according to the present invention;
fig. 2 is a circuit diagram of the trigger circuit of the present invention;
fig. 3 is a diagram of a redundant trigger circuit of the present invention;
fig. 4 is a circuit diagram of the hardware overvoltage detection of the present invention;
fig. 5 is a circuit diagram of the unit voltage sampling circuit of the present invention;
fig. 6 is a circuit diagram of the optical fiber driving circuit of the present invention;
fig. 7 is a positive terminal voltage sampling point diagram of a parallel capacitor in a power unit with a bridge structure according to an embodiment of the present invention.
In the figure: 1-a first switch power supply 2-a trigger circuit 3-a full-control switch device 4-a redundancy trigger circuit 5-a first current-limiting resistor 6-a first feedback optical fiber 7-a second feedback optical fiber 8-a second current-limiting resistor 9-an optical fiber drive circuit 10-a second switch power supply 11-a hardware overvoltage detection circuit 12-a unit voltage sampling circuit 13-a first optical fiber trigger signal 14-a first feedback signal end 15-a second feedback signal end 16-a second optical fiber trigger signal 17-a voltage sampling point VDC +.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, a redundant trigger circuit with a state feedback function includes a first switching power supply 1, a second switching power supply 10, a trigger circuit 2, a fully-controlled switching device 3, a redundant trigger circuit 4, a first feedback optical fiber 6, a second feedback optical fiber 7, and an optical fiber driving circuit 9. Also comprises a unit voltage sampling circuit 12 and a hardware overvoltage detection circuit 11,
the first switch power supply 1 and the trigger circuit 2 are powered by a basic power supply, and the second switch power supply 10 and the redundant trigger circuit 4 are powered by a redundant power supply; the output terminal VCC-1 of the first switching power supply 1 and the output terminal VCC-2 of the second switching power supply 10 provide two paths of redundant power supplies for the optical fiber driving circuit.
The input end of the trigger circuit 2 is connected with an external first optical fiber trigger signal 13, the input end of the redundant trigger circuit 4 is connected with an external second optical fiber trigger signal 16, and the output ends of the trigger circuit 2 and the redundant trigger circuit 4 are both connected with coils of the bypass contactor. The input end of the redundancy trigger circuit 4 is also connected with a hardware overvoltage detection circuit 11; the input end of the hardware overvoltage detection circuit 11 is connected with the voltage output end of the unit voltage sampling circuit 12, and the output end is connected with the input end of the redundancy trigger circuit 4.
The signal input end of the optical fiber driving circuit 9 is connected with the state signal output ends of the trigger circuit 2 and the redundant trigger circuit 4, and the signal output end of the optical fiber driving circuit 9 is connected with the control end of the full-control switch device 3.
The gate pole of the full-control switch device 3 is connected with the signal output end of the optical fiber drive circuit 9, the drain pole is grounded together with one end of the auxiliary contact of the bypass contactor, and the source pole is connected with the other end of the auxiliary contact of the bypass contactor and then is the signal output end of the full-control switch device 3. The fully-controlled switch device 3 is one of a GTO, a MOSFET, an IGBT, a triode, or a relay, and the embodiment in fig. 1 is a MOSFET.
One end of a power supply of a first feedback optical fiber 6 is connected with a first switching power supply 1 through a first current-limiting resistor 5, one end of a power supply of a second feedback optical fiber 7 is connected with a second switching power supply 10 through a second current-limiting resistor 8, and the other ends of the power supplies of the first feedback optical fiber 6 and the second feedback optical fiber 7 are connected to a signal output end of a fully-controlled switching device 3; the signal output end of the first feedback optical fiber 6 is a first feedback signal end 14; the signal output end of the second feedback optical fiber 7 is a second feedback signal end 15.
As shown in fig. 1-2, the triggering circuit 2 includes a first energy storage capacitor C1, first voltage dividing resistors R2 and R3, a first hysteresis comparator a1, a first isolation driving circuit T1 (in this embodiment, an isolation transformer, an isolation driving circuit formed by a triode, etc.), and a first controllable switching device SCR1, a high voltage power supply L-1 of the triggering circuit 2 is a basic power supply, a low voltage power supply VCC1 is a first switching power supply, the high voltage power supply L-1 is grounded via the first energy storage capacitor C1, a first optical fiber triggering signal 13 is connected to a primary side input end of the first isolation driving circuit T1 through an optical fiber receiver Q1, a secondary side output end of the first isolation driving circuit T1 is connected to a triggering control end of the first controllable switching device SCR1, an upper end of the first controllable switching device SCR1 is connected to the high voltage power supply L-1, and a lower end is an output end of the triggering circuit, a coil connected to the bypass contactor. In the trigger circuit 2, the upper ends of first voltage dividing resistors R2 and R3 are connected to a high-voltage power supply terminal L-1, and the voltage dividing output terminal outputs a first energy storage state signal through a first hysteresis comparator a1 and sends the first energy storage state signal to the optical fiber driving circuit 9.
As shown in fig. 1 and 3, the redundant trigger circuit 4 includes a second energy storage capacitor C2, second voltage dividing resistors R5 and R6, a second hysteresis comparator a2, a second isolation driving circuit T2 (in this embodiment, an isolation transformer, an isolation driving circuit formed by a triode, or the like), and a second controllable switching device SCR2, a high-voltage power supply terminal L-2 of the redundant trigger circuit 4 is a redundant power supply, a low-voltage power supply terminal VCC2 is the second switching power supply 10, the high-voltage power supply terminal L-2 is grounded via the second energy storage capacitor C2, and an overvoltage trigger signal output by the hardware overvoltage detection circuit 11 is connected in parallel with a second optical fiber trigger signal (through an optical fiber receiver Q2) through a field effect transistor Q3 and is connected to an input terminal of the second isolation driving circuit T2 at the same time. The output end of the second isolation driving circuit T2 is connected with the trigger control end of the second controllable switching device SCR2, the upper end of the second controllable switching device SCR2 is connected with the high-voltage power supply end L-2, and the lower end of the second controllable switching device SCR2 is the output end of the redundancy trigger circuit and is connected to the coil of the bypass contactor. In the redundant trigger circuit 4, the upper ends of the second voltage-dividing resistors R5 and R6 are connected to the high-voltage power supply terminal L-2, and the voltage-dividing output terminal outputs a second energy-storage state signal through the second hysteresis comparator a2 and sends the second energy-storage state signal to the optical fiber drive circuit 9.
The first controllable switching device SCR1 and the second controllable switching device SCR2 are one of a thyristor, a GTO, a MOSFET, and an IGBT, and the embodiment in the figure is a thyristor.
As shown in fig. 1 and 4, the hardware overvoltage detection circuit 11 includes a third hysteretic comparator A3 and third voltage-dividing resistors R41 and R42, input terminals of the third voltage-dividing resistors R41 and R42 are input terminals VDC/X of the hardware overvoltage detection circuit, voltage-dividing output terminals of the third voltage-dividing resistors R41 and R42 are connected to the third hysteretic comparator A3, and an output terminal of the third hysteretic comparator A3 is an output terminal of the hardware overvoltage detection circuit 11.
As shown in fig. 1 and 5, the input end signal of the cell voltage sampling circuit 12 is taken from the main circuit voltage end VDC + of the device, and the cell voltage sampling circuit is a proportional operation circuit. The proportional operation circuit is formed by connecting an operational amplifier A4 and its peripheral resistors R51-R53. As shown in fig. 7, taking a full-bridge power unit of a bridge arm (a cascade reactive power compensation device, a cascade active filter device, an inverter unit of a cascade high-voltage frequency conversion device, and a chopper unit of a cascade dc power supply device are the same as those) of an MMC flexible dc power transmission converter valve as an example, a main circuit voltage end of the device is a positive terminal VDC + of a parallel capacitor C in the power unit of a bridge structure. The output end of the unit voltage sampling circuit 12 is also connected to the input end of the optical fiber driving circuit 9 as a voltage detection signal.
As shown in fig. 1 and 6, the optical fiber driving circuit 9 includes a main control MCU, a power supply end of the main control MCU is respectively connected to VCC-1 of the first switching power supply 1 and VCC-2 of the second switching power supply 10 through two diodes D1 and D2 which are reversely butted, an input port of the main control MCU is connected to a status signal output end of the trigger circuit, a redundant trigger circuit, and an output end of the unit voltage sampling circuit 12, and an output port of the main control MCU is connected to a driving control end of the full-control switching device 3.
As shown in fig. 1-7, a redundant trigger circuit including a status feedback function according to the present embodiment operates as follows:
(1) before the redundant trigger circuit with the state feedback function is started, the first switch power supply 1, the trigger circuit 2, the redundant trigger circuit 4, the optical fiber driving circuit 9, the second switch power supply 10, the hardware overvoltage detection circuit 11 and the unit voltage sampling circuit 12 do not work. At this time, the thyristor SCR2 of the redundant trigger circuit 4 and the thyristor SCR1 of the trigger circuit 2 are both in a cut-off state, the fully-controlled switching device 3 connected in parallel with the auxiliary contact of the bypass contactor is in a cut-off state, the signals of the first optical fiber output trigger signal 13 and the second optical fiber trigger signal 16 are invalid, and no optical signal is output from the first feedback signal end 14 and the second feedback signal end 15;
(2) after the power supply is powered on, the power supply supplies power to the trigger circuit 2, and the energy storage capacitor C1 is charged through a charging resistor R1 of the trigger circuit 2;
(3) after the power supply is powered on, the power supply supplies power to the first switch power supply 1, and the output VCC-1 of the first switch power supply 1 and the output VCC-2 of the second switch power supply redundantly supply power to the optical fiber drive circuit 9.
(4) After the redundant power supply is powered on, the redundant trigger circuit 4 is powered on, and the energy storage capacitor C2 is charged through the charging resistor R4 of the redundant trigger circuit 4.
(5) After the redundant power supply is powered on, the power is supplied to the second switch power supply 10, and the output VCC-2 of the second switch power supply 10 and the redundancy of VCC-1 supply power to the optical fiber drive circuit 9.
(6) The optical fiber driving circuit 9 collects the output states of the trigger circuit 2, the redundant trigger circuit 4 and the power supply voltage sampling circuit 12, and converts the state information into a digital output (for example, PWM) mode for output;
(7) the PWM mode signal output by the optical fiber driving circuit 9 controls the on-off of the full-control switch device 3 to drive the first feedback optical fiber 6 and the second feedback optical fiber 7 to output corresponding optical signals; at this time, due to the control of the PWM signal, the first feedback fiber 6 and the second feedback fiber 7 are in an on-off alternating state, and the states of the trigger circuit 2, the redundant trigger circuit 4, and the cell voltage detection signal are reported to the main control system of the device through the first feedback signal terminal 14 and the second feedback signal terminal 15.
(8) The signal input of the unit voltage sampling circuit 12 is taken from the direct current positive end of a capacitor C of the power unit, namely VDC +, and the voltage is changed into the proportional VDC/X by adopting a proportional circuit;
(9) when the hardware overvoltage detection circuit 11 detects that the output signal of the cell voltage sampling circuit 12 exceeds the voltage reference VREF of the third hysteresis comparator a3, a trigger signal is sent to the redundant trigger circuit 4.
(10) After the energy storage capacitor C1 of the trigger circuit 2 is charged, the first optical fiber trigger signal 13 may be received to trigger the bypass contactor to close;
(11) when the energy storage capacitor C2 of the redundant trigger circuit 4 is charged, the second optical fiber trigger signal 16 may be received to trigger the bypass contactor to close; the control circuit can also receive the output signal control of the hardware overvoltage detection circuit 11, can trigger the closing of the bypass contactor when the hardware is in overvoltage, and does not depend on an external optical fiber trigger signal.
(12) The trigger circuit 2 and the redundant trigger circuit 4 can trigger the bypass contactor to control the contact of the bypass contactor to be closed.
(13) After the auxiliary contact of the bypass contactor is closed, the source electrode of the full-control switch device 3 is grounded through the auxiliary contact, at the moment, the output end of the full-control switch device 3 is always at a low level, the first feedback optical fiber 6 and the second feedback optical fiber 7 are changed into a normally-on state from an on-off alternating state, the state is that the bypass contactor is closed, and the bypass contactor is reported to the main control system through the first feedback signal end 14 and the second feedback signal end 15 to be closed. After the bypass contactor is closed, the fully-controlled switch device 3 is not controlled by the optical fiber driving circuit 9 any more, and the states of the trigger circuit 2 and the redundant trigger circuit 4 and the unit voltage detection signals are not sent outwards.
It should be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and although the present invention has been disclosed in the form of examples, it should be understood that other modifications and equivalents may be made by those skilled in the art without departing from the spirit and scope of the invention.
The redundant trigger circuit including the state feedback function provided by the present invention is introduced in detail, and the principle and the implementation mode of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (15)
1. A redundant trigger circuit with a state feedback function is characterized by comprising a first switch power supply, a second switch power supply, a trigger circuit, a full-control switch device, a redundant trigger circuit, a first feedback optical fiber, a second feedback optical fiber and an optical fiber drive circuit;
the first switch power supply and the trigger circuit are powered by a basic power supply, and the second switch power supply and the redundant trigger circuit are powered by a redundant power supply; the output end of the first switching power supply and the output end of the second switching power supply provide two paths of redundant power supplies for the optical fiber driving circuit;
the input end of the trigger circuit is connected with an external first optical fiber trigger signal, the input end of the redundant trigger circuit is connected with an external second optical fiber trigger signal, and the output ends of the trigger circuit and the redundant trigger circuit are both connected with a coil of the bypass contactor;
the signal input end of the optical fiber driving circuit is connected with the state signal output ends of the trigger circuit and the redundant trigger circuit, and the signal output end of the optical fiber driving circuit is connected with the control end of the full-control switch device;
the lower end of the full-control switch device is grounded together with one end of the auxiliary contact of the bypass contactor, the upper end of the full-control switch device is connected with the other end of the auxiliary contact of the bypass contactor and then is a signal output end of the full-control switch device, and the control end of the full-control switch device is connected with a signal output end of the optical fiber drive circuit;
one end of a power supply of the first feedback optical fiber is connected with a first switching power supply, one end of a power supply of the second feedback optical fiber is connected with a second switching power supply, and the other ends of the power supplies of the first feedback optical fiber and the second feedback optical fiber are connected to the signal output end of the full-control switching device together; the signal output end of the first feedback optical fiber is a first feedback signal end; the signal output end of the second feedback optical fiber is a second feedback signal end.
2. The redundant trigger circuit with the state feedback function according to claim 1, wherein the trigger circuit comprises a first energy storage capacitor, a first voltage divider resistor, a first hysteresis comparator, a first isolation driving circuit and a first controllable switching device, a high-voltage power supply terminal of the trigger circuit is a basic power supply, a low-voltage power supply terminal is a first switching power supply, a high-voltage power supply terminal is grounded via the first energy storage capacitor, a first optical fiber trigger signal is connected to an input terminal of the first isolation driving circuit, an output terminal of the first isolation driving circuit is connected to a trigger control terminal of the first controllable switching device, an upper end of the first controllable switching device is connected to the high-voltage power supply terminal, and a lower end of the first controllable switching device is an output terminal of the trigger circuit and is connected to a coil of the bypass contactor.
3. The redundant trigger circuit with status feedback function according to claim 2, wherein the trigger circuit has a first voltage dividing resistor connected to the high voltage supply terminal, and the voltage dividing output terminal outputs a first energy storage status signal via the first hysteresis comparator and sends the first energy storage status signal to the fiber driver circuit.
4. The redundant trigger circuit with the state feedback function according to claim 1, wherein the redundant trigger circuit comprises a second energy storage capacitor, a second voltage divider resistor, a second hysteresis comparator, a second isolation driving circuit and a second controllable switching device, a high-voltage power supply terminal of the redundant trigger circuit is a redundant power supply, a low-voltage power supply terminal of the redundant trigger circuit is a second switching power supply, the high-voltage power supply terminal is grounded via the second energy storage capacitor, a second optical fiber trigger signal is connected to an input terminal of the second isolation driving circuit, an output terminal of the second isolation driving circuit is connected to a trigger control terminal of the second controllable switching device, an upper end of the second controllable switching device is connected to the high-voltage power supply terminal, and a lower end of the second controllable switching device is an output terminal of the redundant trigger circuit and is connected to a coil of the bypass contactor.
5. The redundant trigger circuit with status feedback function according to claim 4, wherein the upper end of the second voltage-dividing resistor is connected to the high-voltage power supply terminal, and the voltage-dividing output terminal outputs the second energy-storage status signal via the second hysteresis comparator, and sends the second energy-storage status signal to the optical fiber driving circuit.
6. The redundancy trigger circuit with the state feedback function is characterized by further comprising a unit voltage sampling circuit and a hardware overvoltage detection circuit, wherein the input end of the redundancy trigger circuit is further connected with the hardware overvoltage detection circuit; the input end of the hardware overvoltage detection circuit is connected with the voltage output end of the unit voltage sampling circuit, and the output end of the hardware overvoltage detection circuit outputs an overvoltage trigger signal which is connected to the input end of the redundancy trigger circuit.
7. A redundant trigger circuit with a state feedback function according to claim 4 or 6, characterized in that the overvoltage trigger signal output by the hardware overvoltage detection circuit and the second optical fiber trigger signal are connected in parallel to the input end of the second isolation driving circuit of the redundant trigger circuit.
8. The circuit of claim 6, wherein the hardware over-voltage detection circuit comprises a third hysteretic comparator and a third voltage dividing resistor, an input terminal of the third voltage dividing resistor is an input terminal of the hardware over-voltage detection circuit, a voltage dividing output terminal of the third voltage dividing resistor is connected to the third hysteretic comparator, and an output terminal of the third hysteretic comparator is an output terminal of the hardware over-voltage detection circuit.
9. The redundant trigger circuit with status feedback function of claim 6, wherein the input signal of the cell voltage sampling circuit is obtained from the main circuit voltage terminal of the device, and the cell voltage sampling circuit is a proportional operation circuit.
10. The redundant trigger circuit with state feedback function of claim 9, wherein the main circuit voltage terminal of the device is the positive terminal of the parallel capacitor in the power unit with bridge configuration.
11. The redundant trigger circuit with status feedback function of claim 6, wherein the output terminal of the unit voltage sampling circuit is further connected to the input terminal of the fiber driving circuit as a voltage detection signal.
12. The redundant trigger circuit with the state feedback function according to claim 1, wherein the fiber drive circuit comprises a main control MCU, a power supply end of the main control MCU is respectively connected to the first switching power supply and the second switching power supply through two diodes in reverse butt joint, an input port of the main control MCU is connected to the state signal output ends of the trigger circuit and the redundant trigger circuit, and an output port of the main control MCU is connected to the drive control end of the fully-controlled switching device.
13. The redundant trigger circuit with state feedback function of claim 1, wherein said fully controlled switching device is one of GTO, MOSFET, IGBT, triode or relay.
14. A redundant trigger circuit including a state feedback function according to claim 2, wherein said first controllable switching device is one of a thyristor, a GTO, a MOSFET, and an IGBT.
15. A redundant trigger circuit including a state feedback function according to claim 4, wherein said second controllable switching device is one of a thyristor, GTO, MOSFET, IGBT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921326765.9U CN210536509U (en) | 2019-08-15 | 2019-08-15 | Redundant trigger circuit with state feedback function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921326765.9U CN210536509U (en) | 2019-08-15 | 2019-08-15 | Redundant trigger circuit with state feedback function |
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| Publication Number | Publication Date |
|---|---|
| CN210536509U true CN210536509U (en) | 2020-05-15 |
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| CN201921326765.9U Withdrawn - After Issue CN210536509U (en) | 2019-08-15 | 2019-08-15 | Redundant trigger circuit with state feedback function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323931A (en) * | 2019-08-15 | 2019-10-11 | 荣信汇科电气技术有限责任公司 | A kind of redundancy trigger circuit comprising state feedback function |
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2019
- 2019-08-15 CN CN201921326765.9U patent/CN210536509U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323931A (en) * | 2019-08-15 | 2019-10-11 | 荣信汇科电气技术有限责任公司 | A kind of redundancy trigger circuit comprising state feedback function |
| CN110323931B (en) * | 2019-08-15 | 2024-05-10 | 荣信汇科电气股份有限公司 | Redundant trigger circuit containing state feedback function |
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Address after: 114000 212 Yue Ling Road, Anshan, Liaoning Patentee after: Rongxin Huike Electric Co.,Ltd. Address before: 114000 212 Yue Ling Road, Anshan, Liaoning Patentee before: RONGXIN HUIKO ELECTRIC TECHNOLOGY Co.,Ltd. |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200515 Effective date of abandoning: 20240510 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200515 Effective date of abandoning: 20240510 |