CN118337048A - High-voltage sparking quick protection circuit - Google Patents
High-voltage sparking quick protection circuit Download PDFInfo
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- CN118337048A CN118337048A CN202410750763.1A CN202410750763A CN118337048A CN 118337048 A CN118337048 A CN 118337048A CN 202410750763 A CN202410750763 A CN 202410750763A CN 118337048 A CN118337048 A CN 118337048A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 description 8
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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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
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention belongs to the technical field of electronic control protection, and discloses a high-voltage sparking rapid protection circuit which comprises a high-frequency current transformer, an overvoltage protection circuit, a voltage signal conversion circuit, a detection circuit, a comparator, a potentiometer, a trigger, a driving triode and two optocouplers; the high-voltage line output by the high-voltage power supply passes through the high-frequency current transformer, the secondary of the high-frequency current transformer is connected with the overvoltage protection circuit, the voltage signal conversion circuit and the detection circuit in parallel, the detection circuit is also connected with the comparator, the comparator is also connected with the potentiometer and the trigger, the trigger is also connected with the base electrode of the driving triode, the collector electrode of the driving triode is connected with the two optocouplers in series, and the output ends of the two optocouplers are respectively connected with the high-voltage power supply starting-up signal and the high-voltage power supply control system. The invention collects the sparking current through the high-frequency current transformer and the high-speed hardware circuit, controls the starting signal of the high-voltage power supply, and rapidly closes the high-voltage power supply to achieve the purpose of rapid protection.
Description
Technical Field
The invention belongs to the technical field of electronic control protection, and particularly relates to a high-voltage ignition rapid protection circuit.
Background
Because the voltage of the high-voltage power supply is higher, once the load short circuit is ignited, large surge current can be generated, meanwhile, the energy stored by the power supply is large, and the large current and the energy are continuously acted on the load for many times, so that the load is easy to damage, and therefore, the high-voltage power supply needs to be quickly turned off when the ignition occurs, and secondary and multiple ignition is avoided so as to protect the load. If the closing time is too long, the power supply can be started again, secondary and multiple sparks occur, and damage is caused to the load.
The existing protection circuit has the problems of slower reaction, incapability of rapidly closing a power supply and easiness in secondary and multiple ignition after restarting the voltage regulating power supply.
Disclosure of Invention
Aiming at the problems, the invention provides a high-voltage sparking rapid protection circuit, which adopts the following technical scheme:
A high-voltage sparking rapid protection circuit comprises a high-frequency current transformer T, an overvoltage protection circuit, a voltage signal conversion circuit, a detection circuit, a comparator N, a potentiometer RP, a trigger D, a driving triode V3, an optocoupler V4 and an optocoupler V5;
The high-voltage line output by the high-voltage power supply passes through the high-frequency current transformer T, the secondary of the high-frequency current transformer T is connected with the overvoltage protection circuit and the voltage signal conversion circuit in parallel, the detection circuit is connected with the voltage signal conversion circuit in parallel, the detection circuit is also connected with the negative pin of the input end of the comparator N, and the positive pin of the input end of the comparator N is connected with the potentiometer RP;
The output pin of the comparator N is connected with the setting pin of the trigger D, the reset pin of the trigger D is used as a reset end, the output pin of the trigger D is sequentially connected with the base electrode of the driving triode V3, the collector electrode of the driving triode V3 is sequentially connected with the optocoupler V5 in series with the optocoupler V4, the output end of the optocoupler V5 is connected with a high-voltage power-on signal, and the output end of the optocoupler V4 is connected with a high-voltage power-on control system.
Further, the overvoltage protection circuit comprises a TVS tube V1.
Further, the voltage signal conversion circuit comprises a resistor R1.
Further, the detection circuit comprises a resistor R3, a diode V2 and a capacitor C;
one end of the resistor R1 is connected with the resistor R3 and the cathode of the diode V2 in series in sequence, the anode of the diode V2 is connected with one end of the capacitor C, the other end of the capacitor C is connected with the other end of the resistor R1 and grounded, and the anode of the diode V2 is also connected with the cathode pin of the comparator N.
Further, the resistor R2 and the resistor R4 are also included;
one end of the resistor R2 is connected with one end of the resistor R1 and the resistor R3, and the other end of the resistor R2 is connected with a-15V power supply; one end of the resistor R4 is connected with the anode of the diode V2 and the negative pin of the input end of the comparator N, and the other end of the resistor R4 is connected with a +15V power supply.
Further, the positive pin of the input end of the comparator N is connected with the sliding sheet of the potentiometer RP, one end of the potentiometer RP is grounded, and the other end of the potentiometer RP is connected with a-15V power supply.
Further, the resistor R5 is also included;
The reference voltage positive electrode pin of the comparator N is connected with a +15V power supply, the reference voltage negative electrode pin of the comparator N is connected with a-15V power supply, the grounding pin of the comparator N is grounded, one end of the resistor R5 is connected with the output end pin of the comparator N and the setting pin of the trigger D, and the other end of the resistor R5 is connected with the +15V power supply.
Further, the resistor R6 is also included;
The data pin of the trigger D is connected with a-15V power supply, the clock pin of the trigger D is grounded, the reset pin of the trigger D is connected with one end of the resistor R6, the other end of the resistor R6 is grounded, and the input interface of a reset signal is connected with one end of the resistor R6 and the reset pin of the trigger D.
Further, the resistor R7 and the resistor R8 are also included;
The resistor R7 is arranged between the output pin of the trigger D and the base electrode of the driving triode V3, the first end of the resistor R8 is connected with the resistor R7 and the base electrode of the driving triode V3, the second end of the resistor R8 is grounded, and the second end of the resistor R8 is also connected with the emitter electrode of the driving triode V3.
Further, the resistor R9 is also included;
The optocoupler V4 and the optocoupler V5 comprise a diode and a phototriode, wherein the diode cathode of the optocoupler V5 is connected with the collector of the driving triode V3, the diode anode of the optocoupler V5 is connected with the diode cathode of the optocoupler V4, the diode anode of the optocoupler V4 is connected with one end of the resistor R9, and the other end of the resistor R9 is connected with a +15V power supply; the collector and the emitter of the phototriode of the optocoupler V5 are connected with a high-voltage power supply startup signal, and the collector and the emitter of the phototriode of the optocoupler V4 are connected with a high-voltage power supply control system.
The invention has the beneficial effects that:
1. The invention uses the high-frequency ferrite magnetic ring to wind the high-frequency current transformer, can isolate the high-voltage output line from high voltage, and can avoid signal interference formed by ground wire.
2. The circuit has the judging function of disconnection and wire disconnection of the high-frequency current transformer.
3. The circuit realizes fault self-locking through the self-locking function of the D-type trigger.
4. The circuit of the invention is connected in series into the starting signal of the high-voltage power supply through the secondary of the optical coupler, isolates the starting signal of the high-voltage power supply from the circuit, the optical coupler is not conducted, and the high-voltage power supply is shut down; in the system control of accessing the high-voltage power supply through the secondary of the optocoupler, a high-voltage power supply starting signal and the circuit are isolated, so that the high-voltage power supply is closed, and meanwhile, the sparking fault is collected.
5. The circuit of the invention protects hardware at high speed, so that the sparking protection time is as low as several microseconds.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structure of a high voltage ignition fast protection circuit according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that the terms "first," "second," and the like herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein.
The invention provides a high-voltage ignition rapid protection circuit, which is used for collecting ignition current through a high-frequency current transformer T of a ferrite magnetic core and a high-speed hardware circuit, controlling a starting signal of a high-voltage power supply, rapidly closing the high-voltage power supply and achieving the purpose of rapid protection.
As shown in FIG. 1, the high-voltage rapid protection circuit comprises a high-frequency current transformer T, an overvoltage protection circuit, a voltage signal conversion circuit, a detection circuit, a comparator N, a potentiometer RP, a trigger D, a driving triode V3, an optocoupler V4 and an optocoupler V5.
The high-frequency current transformer T is formed by adopting a ferrite magnetic ring, so that the response speed is improved. The high-voltage line output by the high-voltage power supply passes through the high-frequency current transformer T, so that the sparking current can be effectively collected, the interference generated by ground wire penetration is avoided, and the high-voltage isolation is realized.
The secondary of the high-frequency current transformer T is connected with an overvoltage protection circuit and a voltage signal conversion circuit in parallel, a detection circuit is connected with the voltage signal conversion circuit in parallel, the detection circuit is also connected with a negative pin of an input end of a comparator N, and a positive pin of the input end of the comparator N is connected with a potentiometer RP.
The invention uses the high-frequency ferrite magnetic ring to wind the high-frequency current transformer T, can isolate the high voltage from the high voltage output line, and can avoid the signal interference formed by the ground wire.
For example, the overvoltage protection circuit includes a TVS tube (TRANSIENT VOLTAGE SUPPRESSOR, transient voltage suppression diode) V1, the voltage signal conversion circuit includes a resistor R1, and the detection circuit includes a resistor R3, a diode V2, and a capacitor C.
The secondary of the high-frequency current transformer T is connected with the TVS tube V1 and the resistor R1 in parallel, after the secondary of the high-frequency current transformer T is connected into a circuit, the resistor R1 converts a current signal induced by the high-frequency current transformer T into a voltage signal, the TVS tube V1 plays a role in protection, and when the voltage is too high, the voltage can be clamped at 15V.
One end of the resistor R1 is connected with the resistor R3 and the cathode of the diode V2 in series in sequence, the anode of the diode V2 is connected with one end of the capacitor C, the other end of the capacitor C is connected with the other end of the resistor R1 and grounded, and the anode of the diode V2 is also connected with the cathode pin (3 pin) of the comparator N.
For example, the high voltage ignition fast protection circuit further includes a resistor R2, a resistor R4, a resistor R5, and a resistor R6.
One end of the resistor R2 is connected with one end of the resistor R1 and the resistor R3, and the other end of the resistor R2 is connected with a-15V power supply.
One end of the resistor R4 is connected with the anode of the diode V2 and the negative pin (3 pin) of the input end of the comparator N, and the other end of the resistor R4 is connected with a +15V power supply.
For example, comparator N may employ LM211, LM211 having 8 pins, flip-flop D may employ CD4103, CD4103 having 14 pins, as shown in FIG. 1, including pins 1-14.
Wherein CD4103 has two identical D-type flip-flops, each having independent data, set, reset, clock input and output, the invention uses one D-type flip-flop in CD4103 and the other as a spare.
The positive electrode pin (2 pins) of the input end of the comparator N is connected with a sliding sheet of the potentiometer RP, one end of the potentiometer RP is grounded, the other end of the potentiometer RP is connected with a-15V power supply, and the output end pin (7 pins, namely the OUT pin) of the comparator N is connected with the setting pin (S1 pin, namely the 6 pin) of the trigger D.
One end of the resistor R5 is connected with an output end pin (7 pins, namely an OUT pin) of the comparator N and a setting pin (S1 pin, namely a 6 pin) of the trigger D, and the other end of the resistor R5 is connected with a +15V power supply.
The reference voltage positive electrode pin (8 pin, namely V+ pin) of the comparator N is connected with a +15V power supply, the reference voltage negative electrode pin (4 pin, namely V-pin) of the comparator N is connected with a-15V power supply, and the grounding pin (1 pin, namely GND pin) of the comparator N is grounded.
The data pin (D1 pin, namely 5 pins) of the trigger D is connected with a-15V power supply, the clock pin (C1, namely 3 pins) of the trigger D is grounded, the reset pin (R pin, namely 4 pins) of the trigger D is used as a reset end, the reset pin (R1 pin, namely 6 pins) of the trigger D is connected with one end of a resistor R6, the other end of the resistor R6 is grounded, and an input interface of a reset signal is connected with one end of the resistor R6 and the reset pin (R pin) of the trigger D. The grounding pin (7 pins) of the trigger D is grounded, and the power supply pin (14 pins) of the trigger D is connected with a +15V power supply.
Output pin of trigger D2 Feet) are sequentially connected with the base electrode of the driving triode V3, the collector electrode of the driving triode V3 is sequentially connected with the optocoupler V5 and the optocoupler V4 in series, the output end of the optocoupler V5 is connected with a high-voltage power-on signal, and the output end of the optocoupler V4 is connected with a high-voltage power-on control system.
For example, the high-voltage sparking rapid protection circuit also comprises a resistor R7, wherein the resistor R7 is arranged at the output pin of the trigger DPin 2), the base of the drive transistor V3.
For example, the high-voltage sparking rapid protection circuit further comprises a resistor R8 and a resistor R9, wherein a first end of the resistor R8 is connected with the resistor R7 and a base electrode of the driving triode V3, a second end of the resistor R8 is grounded, and a second end of the resistor R8 is also connected with an emitter electrode of the driving triode V3.
For example, the optocoupler V4 and the optocoupler V5 each include a diode and a phototransistor, a diode cathode of the optocoupler V5 is connected to a collector of the driving triode V3, a diode anode of the optocoupler V5 is connected to a diode cathode of the optocoupler V4, a diode anode of the optocoupler V4 is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to a +15v power supply.
The collector and the emitter of the phototriode of the optocoupler V5 are connected with a high-voltage power-on signal, and the collector and the emitter of the phototriode of the optocoupler V4 are connected with a high-voltage power control system.
The positive electrode pin (2 pins) of the input end of the comparator N is divided by the potentiometer RP, and the reference negative voltage is obtained by minus 15V. The output end of the optical coupler V4 is connected with a high-voltage power supply control system and used as a fault signal. The output end of the optical coupler V5 is connected with a high-voltage power supply starting signal, namely the optical coupler V5 is turned on, the high-voltage power supply works, the optical coupler V5 is turned off, and the high-voltage power supply stops working. The use of the optocoupler V5 isolates the power-on signal of the power supply from the circuit, thereby reducing the complexity of the system.
The working principle of the high-voltage sparking rapid protection circuit is as follows:
When the high-voltage power supply is electrified, a1 second reset signal is sent to a reset pin (R pin, namely 4 pins) of the trigger D from the outside, so that the trigger D works normally. When no pulse current passes through the high-frequency current transformer T, the high-frequency current transformer T is in a short circuit state, a resistor R3 and a resistor R4 form partial voltage to obtain a positive voltage signal, the positive voltage signal is sent to an input end negative electrode pin (3 pins) of the comparator N, an input end positive electrode pin (2 pins) of the comparator N is a negative voltage signal, at the moment, the 3 pins of the comparator N are higher than the 2 pins, an output end pin (7 pins, namely an OUT pin) of the comparator N outputs a low level, the low level is input to a reset pin (R pin, namely a 6 pin) of the trigger D, a1 pin of the trigger D is set low, a 2 pin of the trigger D is set high, the trigger D pushes a triode V3 through a resistor R7 to enable an optocoupler V4 and an optocoupler V5 to be conducted, a starting signal of a high-voltage power supply can normally pass, and a high-voltage power supply control system does not have a lighting fault.
The circuit has a wiring disconnection judging function, and the specific process is as follows: because the high-voltage line output by the high-voltage power supply passes through the high-frequency current transformer T, the secondary side of the high-frequency current transformer T is connected with the TVS tube V1 and the resistor R1 in parallel, when the circuit is not connected or the lead is disconnected, the resistor R1 is not in short circuit, +15V is divided by the resistor R4, the resistor R3 and the resistor R2 and-15V, and negative voltage smaller than 2 pins of the comparator N can be obtained at 3 pins of the comparator N through proper resistance matching, at the moment, 7 pins of the comparator N are high, the pin 6 of the trigger D is high, the pin 1 of the trigger D is turned high, the pin 2 of the trigger D is low, the triode V3 is not conducted any more, the optocoupler V4 and the optocoupler V5 are not conducted, the starting signal of the high-voltage power supply cannot be started, the optocoupler V5 is disconnected, the high-voltage power supply control system can output a sparking fault signal, and the fact that the high-frequency current transformer T is not connected or the lead is disconnected can be judged.
The circuit of the invention is connected in series into the starting signal of the high-voltage power supply through the secondary of the optical coupler, the starting signal of the high-voltage power supply is isolated from the circuit, the optical coupler is not conducted, and the high-voltage power supply is shut down.
When the high-voltage power supply is ignited, current is induced in the high-frequency current transformer T, and the high-frequency current transformer T acts on the resistor R1 through a coil to form voltage. The circuit of the invention collects negative current, namely negative voltage is generated on a resistor R1, the generated negative voltage is transmitted to a 3 pin of a comparator N, the voltage on the 3 pin of the comparator N is smaller than the voltage on a2 pin of the comparator N, a 7 pin of the comparator N outputs high level, so that a 6 pin of a trigger D is high, a1 pin of the trigger D is turned to be high, a2 pin of the trigger D is low, a triode V3 is not conducted any more, an optocoupler V4 and an optocoupler V5 are not conducted, a starting signal of a high-voltage power supply is disconnected, the high-voltage power supply is shut down, and a high-voltage power supply control system outputs a sparking fault signal.
In the system control of the high-voltage power supply connected to the secondary side of the optocoupler, the circuit isolates the starting-up signal of the high-voltage power supply from the circuit, so that the high-voltage power supply is turned off, and meanwhile, the ignition fault is collected.
The CD4013 is a D-type trigger, has a maintenance function, realizes fault self-locking, has the specific process that the 6 pins of the CD4013 are SET ends, and after being triggered, the output 2 pins of the CD4013 are kept unchanged even if the voltage of the 7 pins of the LM211 is high and low, the fault self-locking is realized, a starting signal of a high-voltage power supply is continuously disconnected, a high-voltage power supply control system continuously receives a spark fault until the outside sends a high-level reset signal to the 4 pins of the CD4013, the CD4013 is forcedly reset at the moment, the 1 pins are low, the 2 pins are high, the triode V3 leads to the conduction of an optocoupler V4 and an optocoupler V5, the high-voltage power supply can be started, and the fault of the high-voltage power supply control system is reset at the same time.
In the high-voltage ignition rapid protection circuit, signal transmission is hardware transmission, the working turnover time is hundred nanoseconds, and the transmission time of the whole circuit is of the order of a few microseconds, so that from the occurrence of high-voltage ignition to the shutdown of a high-voltage power supply, the shutdown of the level of a few microseconds can be realized, the restarting completion time of the high-voltage power supply is of the order of a millisecond, and the restarting of the high-voltage power supply is not completed, thereby avoiding the possibility of secondary high-voltage ignition and effectively protecting the load.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The high-voltage sparking rapid protection circuit is characterized by comprising a high-frequency current transformer T, an overvoltage protection circuit, a voltage signal conversion circuit, a detection circuit, a comparator N, a potentiometer RP, a trigger D, a driving triode V3, an optocoupler V4 and an optocoupler V5;
The high-voltage line output by the high-voltage power supply passes through the high-frequency current transformer T, the secondary of the high-frequency current transformer T is connected with the overvoltage protection circuit and the voltage signal conversion circuit in parallel, the detection circuit is connected with the voltage signal conversion circuit in parallel, the detection circuit is also connected with the negative pin of the input end of the comparator N, and the positive pin of the input end of the comparator N is connected with the potentiometer RP;
The output pin of the comparator N is connected with the setting pin of the trigger D, the reset pin of the trigger D is used as a reset end, the output pin of the trigger D is sequentially connected with the base electrode of the driving triode V3, the collector electrode of the driving triode V3 is sequentially connected with the optocoupler V5 in series with the optocoupler V4, the output end of the optocoupler V5 is connected with a high-voltage power-on signal, and the output end of the optocoupler V4 is connected with a high-voltage power-on control system.
2. The high voltage ignition flash protection circuit of claim 1, wherein the overvoltage protection circuit comprises a TVS tube V1.
3. The rapid protection circuit for high voltage ignition of claim 1, wherein the voltage signal conversion circuit comprises a resistor R1.
4. A high voltage ignition flash protection circuit as recited in claim 3, wherein said detection circuit comprises a resistor R3, a diode V2, and a capacitor C;
one end of the resistor R1 is connected with the resistor R3 and the cathode of the diode V2 in series in sequence, the anode of the diode V2 is connected with one end of the capacitor C, the other end of the capacitor C is connected with the other end of the resistor R1 and grounded, and the anode of the diode V2 is also connected with the cathode pin of the comparator N.
5. The rapid protection circuit for high voltage ignition of claim 4, further comprising a resistor R2 and a resistor R4;
one end of the resistor R2 is connected with one end of the resistor R1 and the resistor R3, and the other end of the resistor R2 is connected with a-15V power supply; one end of the resistor R4 is connected with the anode of the diode V2 and the negative pin of the input end of the comparator N, and the other end of the resistor R4 is connected with a +15V power supply.
6. The rapid protection circuit for high voltage ignition according to claim 1, wherein the positive pin of the input end of the comparator N is connected with the sliding sheet of the potentiometer RP, one end of the potentiometer RP is grounded, and the other end of the potentiometer RP is connected with a-15V power supply.
7. The rapid protection circuit for high voltage ignition of claim 1, further comprising a resistor R5;
The reference voltage positive electrode pin of the comparator N is connected with a +15V power supply, the reference voltage negative electrode pin of the comparator N is connected with a-15V power supply, the grounding pin of the comparator N is grounded, one end of the resistor R5 is connected with the output end pin of the comparator N and the setting pin of the trigger D, and the other end of the resistor R5 is connected with the +15V power supply.
8. The rapid protection circuit for high voltage ignition of claim 1, further comprising a resistor R6;
The data pin of the trigger D is connected with a-15V power supply, the clock pin of the trigger D is grounded, the reset pin of the trigger D is connected with one end of the resistor R6, the other end of the resistor R6 is grounded, and the input interface of a reset signal is connected with one end of the resistor R6 and the reset pin of the trigger D.
9. The rapid protection circuit for high voltage ignition of claim 1, further comprising a resistor R7 and a resistor R8;
The resistor R7 is arranged between the output pin of the trigger D and the base electrode of the driving triode V3, the first end of the resistor R8 is connected with the resistor R7 and the base electrode of the driving triode V3, the second end of the resistor R8 is grounded, and the second end of the resistor R8 is also connected with the emitter electrode of the driving triode V3.
10. The rapid protection circuit for high voltage ignition according to any one of claims 1 to 9, further comprising a resistor R9;
The optocoupler V4 and the optocoupler V5 comprise a diode and a phototriode, wherein the diode cathode of the optocoupler V5 is connected with the collector of the driving triode V3, the diode anode of the optocoupler V5 is connected with the diode cathode of the optocoupler V4, the diode anode of the optocoupler V4 is connected with one end of the resistor R9, and the other end of the resistor R9 is connected with a +15V power supply; the collector and the emitter of the phototriode of the optocoupler V5 are connected with a high-voltage power supply startup signal, and the collector and the emitter of the phototriode of the optocoupler V4 are connected with a high-voltage power supply control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118655820A (en) * | 2024-08-13 | 2024-09-17 | 安徽明辨电子科技有限公司 | Waveguide ignition acquisition and microwave restarting control system and control method |
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| CN201252395Y (en) * | 2008-05-02 | 2009-06-03 | 肖明刚 | Spark suppressor |
| CN208369487U (en) * | 2018-06-13 | 2019-01-11 | 张家口市杰星电子科技有限公司 | High-voltage power module |
| CN114362094A (en) * | 2021-12-22 | 2022-04-15 | 核工业西南物理研究院 | Overcurrent protection circuit for fast recovery high-voltage power supply system |
| CN115693591A (en) * | 2022-10-27 | 2023-02-03 | 安徽明辨电子科技有限公司 | Peak current rapid protection circuit and implementation method thereof |
| CN220673749U (en) * | 2023-07-07 | 2024-03-26 | 广西柳州联耕科技有限公司 | Short-circuit protection MOS switch based on main controller |
| CN117937376A (en) * | 2024-01-23 | 2024-04-26 | 亿隅半导体科技(上海)有限公司 | Dual-isolation type overcurrent protection circuit with self-locking function and protection method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201252395Y (en) * | 2008-05-02 | 2009-06-03 | 肖明刚 | Spark suppressor |
| CN208369487U (en) * | 2018-06-13 | 2019-01-11 | 张家口市杰星电子科技有限公司 | High-voltage power module |
| CN114362094A (en) * | 2021-12-22 | 2022-04-15 | 核工业西南物理研究院 | Overcurrent protection circuit for fast recovery high-voltage power supply system |
| CN115693591A (en) * | 2022-10-27 | 2023-02-03 | 安徽明辨电子科技有限公司 | Peak current rapid protection circuit and implementation method thereof |
| CN220673749U (en) * | 2023-07-07 | 2024-03-26 | 广西柳州联耕科技有限公司 | Short-circuit protection MOS switch based on main controller |
| CN117937376A (en) * | 2024-01-23 | 2024-04-26 | 亿隅半导体科技(上海)有限公司 | Dual-isolation type overcurrent protection circuit with self-locking function and protection method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118655820A (en) * | 2024-08-13 | 2024-09-17 | 安徽明辨电子科技有限公司 | Waveguide ignition acquisition and microwave restarting control system and control method |
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| CN118337048B (en) | 2024-08-30 |
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