CN204028217U - High-pressure valve group zero crossing detection device - Google Patents
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Abstract
High-pressure valve group zero crossing detection device, belongs to high-pressure valve group zero passage detection technical field.The utility model is in order to solve existing zero passage detection technology owing to the zero crossing of high-pressure valve group alternating current can accurately not detected, makes the controllable silicon problem of zero cross fired reliably.It comprises that zero passage detection and phase place observation circuit, fault judging circuit, working state indicating circuit and optical fiber drive and output circuit, and zero passage detection and phase place observation circuit comprise resistance R 1, resistance R 2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first operational amplifier, the second operational amplifier, the first Schmidt trigger, the second Schmidt trigger and phase comparator.The utility model is for the zero passage detection of high-pressure valve group.
Description
Technical field
The utility model relates to high-pressure valve group zero crossing detection device, belongs to high-pressure valve group zero passage detection technical field.
Background technology
The switching device that high pressure TSC uses is composed in series by some controllable silicons, and the concrete number of elements of silicon controlled need to meet withstand voltage condition.Controllable silicon is meeting under the condition of all pressing, and controlling main points has two:
First zero cross fired, it two is synchronous triggerings.
Want reliable zero cross fired, key is the zero crossing that alternating current will be detected.From the structure of valve group, when not conducting of controllable silicon, all hydraulic circuit is equivalent to impedance one by one, empirical tests, and when components accuracy is 1% when interior, on each controllable silicon, the phase place of voltage is identical with the voltage-phase at valve group two ends, and consistance is very good.
Existing zero passage detection technology, owing to the zero crossing of high-pressure valve group alternating current can accurately not detected, makes controllable silicon zero cross fired reliably.
Summary of the invention
The utility model object is in order to solve existing zero passage detection technology owing to the zero crossing of high-pressure valve group alternating current can accurately not detected, makes the controllable silicon problem of zero cross fired reliably, and a kind of high-pressure valve group zero crossing detection device is provided.
High-pressure valve group zero crossing detection device described in the utility model, it comprises that zero passage detection and phase place observation circuit, fault judging circuit, working state indicating circuit and optical fiber drive and output circuit,
Zero passage detection and phase place observation circuit comprise resistance R 1, resistance R 2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first operational amplifier, the second operational amplifier, the first Schmidt trigger, the second Schmidt trigger and phase comparator;
Fault judging circuit comprises resistance R 3, resistance R 4, resistance R 5, resistance R 6, NPN type triode Q1, capacitor C 1, capacitor C 2 and Q trigger;
Working state indicating circuit comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, NPN type triode Q3, NPN type triode Q4, the first light emitting diode L1 and the second light emitting diode L2;
Optical fiber drives and output circuit comprises rejection gate, resistance R 11, resistance R 12, NPN type triode Q2 and the 3rd light emitting diode L3;
One end of resistance R 1 connects the A terminals of high-pressure valve group, the other end of resistance R 1 connects the negative electrode of the first diode D1, the in-phase input end of the anode of the second diode D2 and the first operational amplifier, the C terminals of the anodic bonding high-pressure valve group of the first diode D1, these C terminals are power supply reference edge, the negative electrode of the second diode D2 connects the C terminals of high-pressure valve group, the negative electrode of the 3rd diode D3 connects the C terminals of high-pressure valve group, one end of the anodic bonding resistance R 2 of the 3rd diode D3, the other end of resistance R 2 connects the B terminals of high-pressure valve group, the negative electrode of the anodic bonding of the 3rd diode D3 the 4th diode D4, the C terminals of the anodic bonding high-pressure valve group of the 4th diode D4,
The C terminals of high-pressure valve group connect the inverting input of the first operational amplifier and the in-phase input end of the second operational amplifier, the output terminal of the first operational amplifier connects the input end of the first Schmidt trigger, and the output terminal of the first Schmidt trigger is OZ1 terminals;
The inverting input of the second operational amplifier connects the negative electrode of the 4th diode D4, and the output terminal of the second operational amplifier connects the input end of the second Schmidt trigger, and the output terminal of the second Schmidt trigger is OZ2 terminals; The positive power source terminal of the second operational amplifier connects power supply VCC, and the negative power end of the second operational amplifier connects power supply VEE;
OZ1 terminals connect the first input end of phase comparator, and OZ2 terminals connect the second input end of phase comparator, resistance in series R3 between the output terminal of phase comparator and the base stage of NPN type triode Q1;
The emitter of NPN type triode Q1 connects power supply VEE, resistance in series R4 between the collector of NPN type triode Q1 and the B pin of Q trigger, and the B pin of Q trigger connects one end of capacitor C 1, and the other end of capacitor C 1 connects power supply VEE; One end of the B pin contact resistance R5 of Q trigger, the other end of resistance R 5 connects power supply VCC;
The CLR pin of Q trigger connects power supply VCC, the A pin of Q trigger is connected power supply VEE with C pin, series capacitance C2 between the C pin of Q trigger and RC pin, one end of the RC pin contact resistance R6 of Q trigger, the other end of resistance R 6 connects power supply VCC, the Q pin of Q trigger is OZE terminals, Q trigger
pin is ORR terminals;
Resistance in series R7 between the base stage of OZE terminals and NPN type triode Q3, the emitter of NPN type triode Q3 connects power supply VEE, the collector of NPN type triode Q3 connects the negative electrode of the first light emitting diode L1, one end of the anodic bonding resistance R 8 of the first light emitting diode L1, the other end of resistance R 8 connects power supply VCC;
Resistance in series R9 between the base stage of ORR terminals and NPN type triode Q4, the emitter of NPN type triode Q4 connects power supply VEE, the collector of NPN type triode Q4 connects the negative electrode of the second light emitting diode L2, one end of the anodic bonding resistance R 10 of the second light emitting diode L2, the other end of resistance R 10 connects power supply VCC;
OZE terminals connect the first input end of rejection gate, OZ1 terminals connect the second input end of rejection gate, resistance in series R11 between the base stage of the output terminal of rejection gate and NPN type triode Q2, the emitter of NPN type triode Q2 connects power supply VEE, the collector of NPN type triode Q2 connects the negative electrode of the 3rd light emitting diode L3, one end of the anodic bonding resistance R 12 of the 3rd light emitting diode L3, the other end of resistance R 12 connects power supply VCC.
It also comprises insulating power supply, insulating power supply comprises transformer T, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the first electrochemical capacitor E1, the second electrochemical capacitor E2, capacitor C 3, capacitor C 4, resistance R 13, resistance R 14 and voltage stabilizing diode D9
The former limit of transformer T connects mains supply end, one end of transformer T secondary connects the anode of the 5th diode D5, one end of the negative electrode contact resistance R13 of the 5th diode D5, the first power output end that the other end of resistance R 13 is insulating power supply, this first power output end is power supply VCC;
The negative electrode of the 5th diode D5 connects the negative electrode of the 6th diode D6, the other end of the anodic bonding transformer T secondary of the 6th diode D6, the negative electrode of the anodic bonding of the 6th diode D6 the 8th diode D8, the anode of the anodic bonding of the 8th diode D8 the 7th diode D7, the negative electrode of the 7th diode D7 connects the anode of the 5th diode D5; The center tap of transformer T is power supply reference edge;
The positive pole of the first electrochemical capacitor E1 connects the negative electrode of the 5th diode D5, the negative pole of the first electrochemical capacitor E1 connects the positive pole of the second electrochemical capacitor E2, the negative pole of the second electrochemical capacitor E2 connects the anode of the 7th diode D7, and the positive pole of the second electrochemical capacitor E2 connects power supply reference edge;
Series capacitance C3 between the positive pole of the first electrochemical capacitor E1 and power supply reference edge, series capacitance C4 between the negative pole of the second electrochemical capacitor E2 and power supply reference edge, one end of the negative pole contact resistance R14 of the second electrochemical capacitor E2, the other end of resistance R 14 is the second source output terminal of insulating power supply, and this second source output terminal is power supply VEE;
Power supply VCC connects the negative electrode of voltage stabilizing diode D9, the anodic bonding power supply VEE of voltage stabilizing diode D9.
Advantage of the present utility model: circuit structure of the present utility model is simple, and cost is low; Accuracy of detection is high, through device, selects, and its accuracy of detection is below 50 μ S, less than 1 ° of 50Hz alternating current angle; The temperature of this device is floated with drift all less, adopts integrated transporting discharging and cmos digital circuit to realize, and performance is good, and long-time running is reliable and stable; It operates to adjustment-free mode, and installation and maintenance are very simple; This device interference free performance is splendid, isolation power supply, and optical fiber transmission signal, interference free performance is much better than other homogeneous system.
Accompanying drawing explanation
Fig. 1 is the theory diagram of high-pressure valve group zero crossing detection device described in the utility model;
Fig. 2 is the circuit theory diagrams of optical fiber driving and output circuit;
Fig. 3 is the circuit theory diagrams of zero passage detection and phase place observation circuit, fault judging circuit and working state indicating circuit;
Fig. 4 is the circuit theory diagrams of insulating power supply;
Fig. 5 is the primary connection figure of high-pressure valve group;
Fig. 6 is the schematic diagram of high-pressure valve group zero passage detection.
Embodiment
Embodiment one: to Fig. 6, present embodiment is described below in conjunction with Fig. 1, high-pressure valve group zero crossing detection device described in present embodiment, it comprises that zero passage detection and phase place observation circuit 1, fault judging circuit 2, working state indicating circuit 3 and optical fiber drive and output circuit 4
Zero passage detection and phase place observation circuit 1 comprise resistance R 1, resistance R 2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first operational amplifier 1-1, the second operational amplifier 1-2, the first Schmidt trigger 1-3, the second Schmidt trigger 1-4 and phase comparator 1-5;
Fault judging circuit 2 comprises resistance R 3, resistance R 4, resistance R 5, resistance R 6, NPN type triode Q1, capacitor C 1, capacitor C 2 and Q trigger 1-6;
Working state indicating circuit 3 comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, NPN type triode Q3, NPN type triode Q4, the first light emitting diode L1 and the second light emitting diode L2;
Optical fiber drives and output circuit 4 comprises rejection gate 4-1, resistance R 11, resistance R 12, NPN type triode Q2 and the 3rd light emitting diode L3;
One end of resistance R 1 connects the A terminals of high-pressure valve group, the other end of resistance R 1 connects the negative electrode of the first diode D1, the in-phase input end of the anode of the second diode D2 and the first operational amplifier 1-1, the C terminals of the anodic bonding high-pressure valve group of the first diode D1, these C terminals are power supply reference edge, the negative electrode of the second diode D2 connects the C terminals of high-pressure valve group, the negative electrode of the 3rd diode D3 connects the C terminals of high-pressure valve group, one end of the anodic bonding resistance R 2 of the 3rd diode D3, the other end of resistance R 2 connects the B terminals of high-pressure valve group, the negative electrode of the anodic bonding of the 3rd diode D3 the 4th diode D4, the C terminals of the anodic bonding high-pressure valve group of the 4th diode D4,
The C terminals of high-pressure valve group connect the inverting input of the first operational amplifier 1-1 and the in-phase input end of the second operational amplifier 1-2, the output terminal of the first operational amplifier 1-1 connects the input end of the first Schmidt trigger 1-3, and the output terminal of the first Schmidt trigger 1-3 is OZ1 terminals;
The inverting input of the second operational amplifier 1-2 connects the negative electrode of the 4th diode D4, and the output terminal of the second operational amplifier 1-2 connects the input end of the second Schmidt trigger 1-4, and the output terminal of the second Schmidt trigger 1-4 is OZ2 terminals; The positive power source terminal of the second operational amplifier 1-2 connects power supply VCC, and the negative power end of the second operational amplifier 1-2 connects power supply VEE;
OZ1 terminals connect the first input end of phase comparator 1-5, and OZ2 terminals connect the second input end of phase comparator 1-5, resistance in series R3 between the output terminal of phase comparator 1-5 and the base stage of NPN type triode Q1;
The emitter of NPN type triode Q1 connects power supply VEE, resistance in series R4 between the collector of NPN type triode Q1 and the B pin of Q trigger 1-6, and the B pin of Q trigger 1-6 connects one end of capacitor C 1, and the other end of capacitor C 1 connects power supply VEE; One end of the B pin contact resistance R5 of Q trigger 1-6, the other end of resistance R 5 connects power supply VCC;
The CLR pin of Q trigger 1-6 connects power supply VCC, the A pin of Q trigger 1-6 is connected power supply VEE with C pin, series capacitance C2 between the C pin of Q trigger 1-6 and RC pin, one end of the RC pin contact resistance R6 of Q trigger 1-6, the other end of resistance R 6 connects power supply VCC, the Q pin of Q trigger 1-6 is OZE terminals, Q trigger 1-6's
pin is ORR terminals;
Resistance in series R7 between the base stage of OZE terminals and NPN type triode Q3, the emitter of NPN type triode Q3 connects power supply VEE, the collector of NPN type triode Q3 connects the negative electrode of the first light emitting diode L1, one end of the anodic bonding resistance R 8 of the first light emitting diode L1, the other end of resistance R 8 connects power supply VCC;
Resistance in series R9 between the base stage of ORR terminals and NPN type triode Q4, the emitter of NPN type triode Q4 connects power supply VEE, the collector of NPN type triode Q4 connects the negative electrode of the second light emitting diode L2, one end of the anodic bonding resistance R 10 of the second light emitting diode L2, the other end of resistance R 10 connects power supply VCC;
OZE terminals connect the first input end of rejection gate 4-1, OZ1 terminals connect the second input end of rejection gate 4-1, resistance in series R11 between the base stage of the output terminal of rejection gate 4-1 and NPN type triode Q2, the emitter of NPN type triode Q2 connects power supply VEE, the collector of NPN type triode Q2 connects the negative electrode of the 3rd light emitting diode L3, one end of the anodic bonding resistance R 12 of the 3rd light emitting diode L3, the other end of resistance R 12 connects power supply VCC.
The ultimate principle of zero passage detection: shown in Fig. 6, when A, B two point voltage phase isochronous circuit upsets, between A, B, voltage equates to be exactly that these two silicon controlled voltages equal zero, now alternating voltage passes through zero point, now their speed is the fastest, not shake during comparer upset, therefore do not need shaping, rising edge or the negative edge of the square wave of circuit output are exactly zero crossing, its accuracy of detection depends on input offset voltage and the transfer rate of comparer, and the general-purpose device such with LM358 just has satisfied effect.
In actual applications, the controllable silicon of valve group may damage, but the possibility that two detected controllable silicons damage is simultaneously little; as long as there is a controllable silicon to damage; fault judging circuit just can be discovered, and controls optical fiber driving circuit and stops output, reaches the object of protection.The output of this device adopts optical fiber output, voltage isolation capabilities is almost unlimited, so the applied voltage grade of this device depends on the level of insulating power supply, the punching line of making insulating power supply of AGG-10-2.5 type high voltage insulated cable can easily be operated under 10 kilovolts.
When the A shown in Fig. 6, B, 3 of C are connected with this device, the position that A, B, C are 3 is meeting in technological requirement situation and can select arbitrarily, and when valve group star connects, A, B, 3 of C should try one's best near asterism, to alleviate the voltage pressure of insulating power supply.
The principle of work of present embodiment:
The model of the first operational amplifier 1-1, the second operational amplifier 1-2 is LM358A, and the model of the first Schmidt trigger 1-3, the second Schmidt trigger 1-4 is CD40106B, and the model of phase comparator 1-5 is CD4070B.Phase place is identical under normal circumstances with OZ2 for the OZ1 of zero passage detection and 1 output of phase place observation circuit, with driving optic module that zero passage square wave is spread out of with OZ1 as output signal.OZ1 and OZ2 are sent into phase comparator 1-5 and carry out phase bit comparison, it is output as high level under normal circumstances.When a transistors breakdown, its impedance changes, OZ1, there is phase differential in OZ2, the time of phase comparator 1-5 output low level, be that pulse width increases, the width of the potential pulse of capacitor C 1 and amplitude also increase thereupon, and the trigger gate that surpasses Q trigger 1-6 when amplitude is prescribed a time limit, Q trigger 1-6 upset, its output terminal OZE becomes high level, rejection gate 4-1 is blocked output low level, optical fiber no-output, simultaneously LED indication fault.Control system detects optical fiber no-output and does respective handling, protective valve group.The model of Q trigger 1-6 is chosen as 4538,4538th, accurate monostalbe trigger, and its working method is triggering mode again.
Embodiment two: present embodiment is described below in conjunction with Fig. 4, present embodiment is described further embodiment one, it also comprises insulating power supply 5, insulating power supply 5 comprises transformer T, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the first electrochemical capacitor E1, the second electrochemical capacitor E2, capacitor C 3, capacitor C 4, resistance R 13, resistance R 14 and voltage stabilizing diode D9
The former limit of transformer T connects mains supply end, one end of transformer T secondary connects the anode of the 5th diode D5, one end of the negative electrode contact resistance R13 of the 5th diode D5, the other end of resistance R 13 is the first power output end of insulating power supply 5, this first power output end is power supply VCC;
The negative electrode of the 5th diode D5 connects the negative electrode of the 6th diode D6, the other end of the anodic bonding transformer T secondary of the 6th diode D6, the negative electrode of the anodic bonding of the 6th diode D6 the 8th diode D8, the anode of the anodic bonding of the 8th diode D8 the 7th diode D7, the negative electrode of the 7th diode D7 connects the anode of the 5th diode D5; The center tap of transformer T is power supply reference edge;
The positive pole of the first electrochemical capacitor E1 connects the negative electrode of the 5th diode D5, the negative pole of the first electrochemical capacitor E1 connects the positive pole of the second electrochemical capacitor E2, the negative pole of the second electrochemical capacitor E2 connects the anode of the 7th diode D7, and the positive pole of the second electrochemical capacitor E2 connects power supply reference edge;
Series capacitance C3 between the positive pole of the first electrochemical capacitor E1 and power supply reference edge, series capacitance C4 between the negative pole of the second electrochemical capacitor E2 and power supply reference edge, one end of the negative pole contact resistance R14 of the second electrochemical capacitor E2, the other end of resistance R 14 is the second source output terminal of insulating power supply 5, and this second source output terminal is power supply VEE;
Power supply VCC connects the negative electrode of voltage stabilizing diode D9, the anodic bonding power supply VEE of voltage stabilizing diode D9.
The model of voltage stabilizing diode D9 is ZENER2.
Claims (2)
1. a high-pressure valve group zero crossing detection device, is characterized in that, it comprises that zero passage detection and phase place observation circuit (1), fault judging circuit (2), working state indicating circuit (3) and optical fiber drive and output circuit (4),
Zero passage detection and phase place observation circuit (1) comprise resistance R 1, resistance R 2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the first operational amplifier (1-1), the second operational amplifier (1-2), the first Schmidt trigger (1-3), the second Schmidt trigger (1-4) and phase comparator (1-5);
Fault judging circuit (2) comprises resistance R 3, resistance R 4, resistance R 5, resistance R 6, NPN type triode Q1, capacitor C 1, capacitor C 2 and Q trigger (1-6);
Working state indicating circuit (3) comprises resistance R 7, resistance R 8, resistance R 9, resistance R 10, NPN type triode Q3, NPN type triode Q4, the first light emitting diode L1 and the second light emitting diode L2;
Optical fiber drives and output circuit (4) comprises rejection gate (4-1), resistance R 11, resistance R 12, NPN type triode Q2 and the 3rd light emitting diode L3;
One end of resistance R 1 connects the A terminals of high-pressure valve group, the other end of resistance R 1 connects the negative electrode of the first diode D1, the in-phase input end of the anode of the second diode D2 and the first operational amplifier (1-1), the C terminals of the anodic bonding high-pressure valve group of the first diode D1, these C terminals are power supply reference edge, the negative electrode of the second diode D2 connects the C terminals of high-pressure valve group, the negative electrode of the 3rd diode D3 connects the C terminals of high-pressure valve group, one end of the anodic bonding resistance R 2 of the 3rd diode D3, the other end of resistance R 2 connects the B terminals of high-pressure valve group, the negative electrode of the anodic bonding of the 3rd diode D3 the 4th diode D4, the C terminals of the anodic bonding high-pressure valve group of the 4th diode D4,
The C terminals of high-pressure valve group connect the inverting input of the first operational amplifier (1-1) and the in-phase input end of the second operational amplifier (1-2), the output terminal of the first operational amplifier (1-1) connects the input end of the first Schmidt trigger (1-3), and the output terminal of the first Schmidt trigger (1-3) is OZ1 terminals;
The inverting input of the second operational amplifier (1-2) connects the negative electrode of the 4th diode D4, the output terminal of the second operational amplifier (1-2) connects the input end of the second Schmidt trigger (1-4), and the output terminal of the second Schmidt trigger (1-4) is OZ2 terminals; The positive power source terminal of the second operational amplifier (1-2) connects power supply VCC, and the negative power end of the second operational amplifier (1-2) connects power supply VEE;
OZ1 terminals connect the first input end of phase comparator (1-5), and OZ2 terminals connect the second input end of phase comparator (1-5), resistance in series R3 between the output terminal of phase comparator (1-5) and the base stage of NPN type triode Q1;
The emitter of NPN type triode Q1 connects power supply VEE, resistance in series R4 between the collector of NPN type triode Q1 and the B pin of Q trigger (1-6), the B pin of Q trigger (1-6) connects one end of capacitor C 1, and the other end of capacitor C 1 connects power supply VEE; One end of the B pin contact resistance R5 of Q trigger (1-6), the other end of resistance R 5 connects power supply VCC;
The CLR pin of Q trigger (1-6) connects power supply VCC, the A pin of Q trigger (1-6) is connected power supply VEE with C pin, series capacitance C2 between the C pin of Q trigger (1-6) and RC pin, one end of the RC pin contact resistance R6 of Q trigger (1-6), the other end of resistance R 6 connects power supply VCC, the Q pin of Q trigger (1-6) is OZE terminals, Q trigger (1-6)
pin is ORR terminals;
Resistance in series R7 between the base stage of OZE terminals and NPN type triode Q3, the emitter of NPN type triode Q3 connects power supply VEE, the collector of NPN type triode Q3 connects the negative electrode of the first light emitting diode L1, one end of the anodic bonding resistance R 8 of the first light emitting diode L1, the other end of resistance R 8 connects power supply VCC;
Resistance in series R9 between the base stage of ORR terminals and NPN type triode Q4, the emitter of NPN type triode Q4 connects power supply VEE, the collector of NPN type triode Q4 connects the negative electrode of the second light emitting diode L2, one end of the anodic bonding resistance R 10 of the second light emitting diode L2, the other end of resistance R 10 connects power supply VCC;
OZE terminals connect the first input end of rejection gate (4-1), OZ1 terminals connect the second input end of rejection gate (4-1), resistance in series R11 between the base stage of the output terminal of rejection gate (4-1) and NPN type triode Q2, the emitter of NPN type triode Q2 connects power supply VEE, the collector of NPN type triode Q2 connects the negative electrode of the 3rd light emitting diode L3, one end of the anodic bonding resistance R 12 of the 3rd light emitting diode L3, the other end of resistance R 12 connects power supply VCC.
2. high-pressure valve group zero crossing detection device according to claim 1, it is characterized in that, it also comprises insulating power supply (5), insulating power supply (5) comprises transformer T, the 5th diode D5, the 6th diode D6, the 7th diode D7, the 8th diode D8, the first electrochemical capacitor E1, the second electrochemical capacitor E2, capacitor C 3, capacitor C 4, resistance R 13, resistance R 14 and voltage stabilizing diode D9
The former limit of transformer T connects mains supply end, one end of transformer T secondary connects the anode of the 5th diode D5, one end of the negative electrode contact resistance R13 of the 5th diode D5, the other end of resistance R 13 is the first power output end of insulating power supply (5), and this first power output end is power supply VCC;
The negative electrode of the 5th diode D5 connects the negative electrode of the 6th diode D6, the other end of the anodic bonding transformer T secondary of the 6th diode D6, the negative electrode of the anodic bonding of the 6th diode D6 the 8th diode D8, the anode of the anodic bonding of the 8th diode D8 the 7th diode D7, the negative electrode of the 7th diode D7 connects the anode of the 5th diode D5; The center tap of transformer T is power supply reference edge;
The positive pole of the first electrochemical capacitor E1 connects the negative electrode of the 5th diode D5, the negative pole of the first electrochemical capacitor E1 connects the positive pole of the second electrochemical capacitor E2, the negative pole of the second electrochemical capacitor E2 connects the anode of the 7th diode D7, and the positive pole of the second electrochemical capacitor E2 connects power supply reference edge;
Series capacitance C3 between the positive pole of the first electrochemical capacitor E1 and power supply reference edge, series capacitance C4 between the negative pole of the second electrochemical capacitor E2 and power supply reference edge, one end of the negative pole contact resistance R14 of the second electrochemical capacitor E2, the other end of resistance R 14 is the second source output terminal of insulating power supply (5), and this second source output terminal is power supply VEE;
Power supply VCC connects the negative electrode of voltage stabilizing diode D9, the anodic bonding power supply VEE of voltage stabilizing diode D9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474546.6U CN204028217U (en) | 2014-08-21 | 2014-08-21 | High-pressure valve group zero crossing detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474546.6U CN204028217U (en) | 2014-08-21 | 2014-08-21 | High-pressure valve group zero crossing detection device |
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| CN204028217U true CN204028217U (en) | 2014-12-17 |
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| CN201420474546.6U Active CN204028217U (en) | 2014-08-21 | 2014-08-21 | High-pressure valve group zero crossing detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872695A (en) * | 2018-07-04 | 2018-11-23 | 广东省测试分析研究所（中国广州分析测试中心） | Two-phase zero passage signal detection circuit and signal transmission through fiber system |
-
2014
- 2014-08-21 CN CN201420474546.6U patent/CN204028217U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872695A (en) * | 2018-07-04 | 2018-11-23 | 广东省测试分析研究所（中国广州分析测试中心） | Two-phase zero passage signal detection circuit and signal transmission through fiber system |
| CN108872695B (en) * | 2018-07-04 | 2020-08-14 | 广东省测试分析研究所（中国广州分析测试中心） | Two-phase zero-crossing signal detection circuit and optical fiber signal transmission system |
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Effective date of registration: 20210219 Address after: Room 318, building 18, Nangang District, economic development district, Harbin, Heilongjiang Province Patentee after: HARBIN ZHONGCHUANG ELECTRICAL TECHNOLOGY Co.,Ltd. Address before: 150078 No.17 Poyang middle street, Yingbin Road concentration area, Harbin Development Zone, Heilongjiang Province Patentee before: HARBIN CODO ELECTRICAL Co.,Ltd. |