CN1975446B - Silicon controlled trigger current detection prewarning circuit - Google Patents
Silicon controlled trigger current detection prewarning circuit Download PDFInfo
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- CN1975446B CN1975446B CN 200610130089 CN200610130089A CN1975446B CN 1975446 B CN1975446 B CN 1975446B CN 200610130089 CN200610130089 CN 200610130089 CN 200610130089 A CN200610130089 A CN 200610130089A CN 1975446 B CN1975446 B CN 1975446B
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Abstract
The invention relates to a warning circuit of the controlled silicon-spring current detection. The character is in that the circuit is made up of the detecting circuit, the working start/stop circuitand the separated output circuit. The detection circuit is divided into two ways which includes the resistance R1,R2,R3,R4, the electrolysis condenser E1,E2, the optical coupling U1,U2; one is composed by connecting the R1,R3,E1,U1, the other is connected by R2,R4,E2,U2; The working start/stop circuit is connected by the resistance R0, the electrolysis condenser E0, diode D0 and the inverterU1D. The separated output circuit is connected by the U1A and the diode D1; the output of the optical coupling U1, U2 are connected to the input of the U1A; the output of the inverter U1D is connected to the resistance R3 and R4 to supply the power for the U1, U2. The invention is simple and good designation. Also it costs low and it can be used widely.
Description
Technical field
The present invention relates to a kind of controllable silicon detection trigger circuit, particularly a kind of silicon controlled trigger current detection prewarning circuit.
Background technology
At present, in general thyristor gating circuit, detect the early warning part owing to be provided with, like this, after trigger pip is sent, trigger current whether arrive the silicon controlled trigger electrode just have no way of cicada.If in triggering the loop, because of circuit breaker, connector is loosening or come off, controllable silicon trigger electrode not prison welding is solid, all can not trigger controllable silicon work, will inevitably produce the operating adverse consequences of circuit thus.When especially plural controllable silicon cooperatively interacted and uses, the conducting that at a time is triggered reliably of every controllable silicon just seemed even more important.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, a kind of circuit advantages of simple, the safe and reliable silicon controlled trigger current detection prewarning circuit of performance are provided.
The technical solution adopted in the present invention is for achieving the above object: a kind of silicon controlled trigger current detection prewarning circuit is characterized in that this circuit is connected to form by testing circuit, work start and stop circuit and spacing output circuit; Testing circuit is divided into two-way, wherein an alignment detection circuit is connected with the first optocoupler U1 by first resistance R 1, the first optocoupler U1 output terminal is connected with the first electrochemical capacitor E1 is anodal, the minus earth of the first electrochemical capacitor E1, and the positive pole of the first electrochemical capacitor E1 connects the 3rd resistance R 3 simultaneously; Another alignment detection circuit is connected with the second optocoupler U2 by second resistance R 2, and the second optocoupler U2 output terminal is connected with the second electrochemical capacitor E2 is anodal, the minus earth of the second electrochemical capacitor E2, and the positive pole of the second electrochemical capacitor E2 connects the 4th resistance R 4 simultaneously; And the 3rd resistance R 3 is connected with the 4th resistance R 4; Work start and stop circuit connects the positive pole of resistance R O, diode DO and electrochemical capacitor EO, electrochemical capacitor EO minus earth respectively by phase inverter U1D input end; The 3rd resistance R 3 of the output terminal connection detection circuit of phase inverter U1D, the 4th resistance R 4 are powered to the first optocoupler U1, the second optocoupler U2; Spacing output circuit is connected to form by rejection gate U1A and diode D1, and the output terminal of the testing circuit first optocoupler U1, the second optocoupler U2 connects the input end of spacing output circuit rejection gate U1A respectively, and rejection gate U1A output terminal connects diode D1 output early warning signal.
The rejection gate that is provided with in the described spacing output circuit is one or more.
The invention has the beneficial effects as follows: its circuit is simple, and is reasonable in design, practical, uses operation more to simplify.Low cost of manufacture uses energy consumption low, and strong interference immunity and be difficult for disturbing other circuit, circuit be, performance safety, reliable and stable also can be applied to the current detecting and the early warning in other loop, and the scope of application is extensive.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, details are as follows for feature:
Referring to Fig. 1, a kind of silicon controlled trigger current detection prewarning circuit is characterized in that this circuit is connected to form by testing circuit, work start and stop circuit and spacing output circuit; Testing circuit is divided into two-way, wherein an alignment detection circuit is connected with the first optocoupler U1 by first resistance R 1, the first optocoupler U1 output terminal is connected with the first electrochemical capacitor E1 is anodal, the minus earth of the first electrochemical capacitor E1, and the positive pole of the first electrochemical capacitor E1 connects the 3rd resistance R 3 simultaneously; Another alignment detection circuit is connected with the second optocoupler U2 by second resistance R 2, and the second optocoupler U2 output terminal is connected with the second electrochemical capacitor E2 is anodal, the minus earth of the second electrochemical capacitor E2, and the positive pole of the second electrochemical capacitor E2 connects the 4th resistance R 4 simultaneously; And the 3rd resistance R 3 is connected with the 4th resistance R 4; Work start and stop circuit connects the positive pole of resistance R O, diode DO and electrochemical capacitor EO, electrochemical capacitor EO minus earth respectively by phase inverter U1D input end; The 3rd resistance R 3 of the output terminal connection detection circuit of phase inverter U1D, the 4th resistance R 4 are powered to the first optocoupler U1, the second optocoupler U2; Spacing output circuit is connected to form by rejection gate U1A and diode D1, and the output terminal of the testing circuit first optocoupler U1, the second optocoupler U2 connects the input end of spacing output circuit rejection gate U1A respectively, and rejection gate U1A output terminal connects diode D1 output early warning signal.
The rejection gate that is provided with in the described spacing output circuit is one or more.
This circuit is provided with trigger current and detects input end, begins to detect input end, stops to detect input end and an output is auspicious.The trigger current of two-way shown in the figure detects input end and testing circuit, and separates with buffer circuit.Every silicon controlled triggers private one road trigger current in loop and detects input end and testing circuit.
First via trigger current detects input end and is connected to the two ends of triggering current-limiting resistance RT1 in the loop; In like manner, the second road trigger current detects input end and is connected to the second tunnel two ends of triggering current-limiting resistance RT2 in the loop.With first via testing circuit is example: as long as among the current-limiting resistance RT1 trigger current is arranged, the optocoupler U1 of testing circuit is with regard to the conducting output low level.As the triggerless electric current, optocoupler U1 just exports high level, proposes fault pre-alarming.Testing circuit can detected silicon controlled trigger current can be a DC current, it also can be pulse current, the width minimum of pulse is eight microseconds, recurrence interval can be as the case may be from hundred milliseconds of adjustings of 20 microseconds to, just can accomplish that electric capacity large period more is long more as long as change the electric capacity of E1.
Beginning to detect input end and stopping to detect input end all is high level at ordinary times, and when they all became low level, the high level of work start and stop circuit inverter U1D output just began to detect to optocoupler U1, the U2 of testing circuit power supply.When stopping to detect input end and become high level again, optocoupler U1, U2 be power supply not, and detection stops.Usually, thyristor gating circuit work all has certain time delay.Promptly from triggering sending of control signal, to the foundation of effective trigger current, be through after a while, different in size during this period of time.Therefore, become low level, just begin to detect after work start and stop circuit also will postpone a period of time to optocoupler U1, U2 power supply when beginning to detect input end.The time scalable that postpones, the electric capacity that changes electrochemical capacitor EO just can accomplish that the time of the big more delay of electric capacity is long more.Under the not really strict situation of the requirement that begins to detect and stop to detect, uses that also can connect together of these two input ends becomes a detection control end.
Spacing output circuit comprises a rejection gate, and during its output high level, the expression controllable silicon is by triggered as normal, and during its output low level, the expression trigger circuit have fault, provide alert.This circuit is to keep apart between each testing circuit, and the work of each testing circuit is independent of each other.Input termination one alignment detection circuit of rejection gate.If a rejection gate has a plurality of input ends, this rejection gate just can connect a plurality of testing circuits so.If a plurality of rejection gates are arranged, the output of these rejection gates also will separate with diode D1, to eliminate influencing each other between the rejection gate.According to the requirement of external circuit,, when high level provides alert, the rejection gate of this circuit can be used instead or door gets final product if low level is working properly.
Above-mentioned with reference to embodiment to the detailed description that silicon controlled trigger current detection prewarning circuit carries out, be illustrative rather than determinate, therefore, should belong within protection scope of the present invention in the variation and the modification that do not break away under the general plotting of the present invention.
Claims (2)
1. a silicon controlled trigger current detection prewarning circuit is characterized in that this circuit is connected to form by testing circuit, work start and stop circuit and spacing output circuit; Testing circuit is divided into two-way, wherein an alignment detection circuit is connected with first optocoupler (U1) by first resistance (R1), first optocoupler (U1) output terminal is connected with first electrochemical capacitor (E1) is anodal, the minus earth of first electrochemical capacitor (E1), the positive pole of first electrochemical capacitor (E1) connects the 3rd resistance (R3) simultaneously; Another alignment detection circuit is connected with second optocoupler (U2) by second resistance (R2), second optocoupler (U2) output terminal is connected with second electrochemical capacitor (E2) is anodal, the minus earth of second electrochemical capacitor (E2), the positive pole of second electrochemical capacitor (E2) connects the 4th resistance (R4) simultaneously; And the 3rd resistance (R3) is connected with the 4th resistance (R4); Work start and stop circuit connects the positive pole of resistance (RO), diode (DO) and electrochemical capacitor (EO), electrochemical capacitor (EO) minus earth respectively by phase inverter (U1D) input end; The 3rd resistance (R3) of the output terminal connection detection circuit of phase inverter (U1D), the 4th resistance (R4) are to first optocoupler (U1), second optocoupler (U2) power supply; Spacing output circuit is connected to form by rejection gate (U1A) and diode (D1), the output terminal of testing circuit first optocoupler (U1), second optocoupler (U2) connects the input end of spacing output circuit rejection gate (U1A) respectively, and rejection gate (U1A) output terminal connects diode (D1) output early warning signal.
2. silicon controlled trigger current detection prewarning circuit according to claim 1 is characterized in that the rejection gate that is provided with in the described spacing output circuit is one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610130089 CN1975446B (en) | 2006-12-12 | 2006-12-12 | Silicon controlled trigger current detection prewarning circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610130089 CN1975446B (en) | 2006-12-12 | 2006-12-12 | Silicon controlled trigger current detection prewarning circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1975446A CN1975446A (en) | 2007-06-06 |
| CN1975446B true CN1975446B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610130089 Expired - Fee Related CN1975446B (en) | 2006-12-12 | 2006-12-12 | Silicon controlled trigger current detection prewarning circuit |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4262234A (en) * | 1979-10-12 | 1981-04-14 | Burroughs Corporation | SCR Lamp supply trigger circuit |
| CN85103691A (en) * | 1985-05-13 | 1986-11-12 | 龙飞 | Thyristor gating circuit |
| US5144517A (en) * | 1989-10-20 | 1992-09-01 | Pepperl + Fuchs, Inc. | Intrinsically safe barrier device |
| US20030214773A1 (en) * | 2002-04-19 | 2003-11-20 | Nobutaka Kitagawa | Protection circuit section for semiconductor circuit system |
| CN1545794A (en) * | 2000-12-20 | 2004-11-10 | Overvoltage protection circuit | |
| CN2754106Y (en) * | 2004-12-13 | 2006-01-25 | 宝钢集团上海梅山有限公司 | Simple high-power silicon controlled rectifier measuring instrument |
| CN200982994Y (en) * | 2006-12-12 | 2007-11-28 | 天津市诺尔电气有限公司 | Controllable silicon triggered current detection alarming circuit |
-
2006
- 2006-12-12 CN CN 200610130089 patent/CN1975446B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4262234A (en) * | 1979-10-12 | 1981-04-14 | Burroughs Corporation | SCR Lamp supply trigger circuit |
| CN85103691A (en) * | 1985-05-13 | 1986-11-12 | 龙飞 | Thyristor gating circuit |
| US5144517A (en) * | 1989-10-20 | 1992-09-01 | Pepperl + Fuchs, Inc. | Intrinsically safe barrier device |
| CN1545794A (en) * | 2000-12-20 | 2004-11-10 | Overvoltage protection circuit | |
| US20030214773A1 (en) * | 2002-04-19 | 2003-11-20 | Nobutaka Kitagawa | Protection circuit section for semiconductor circuit system |
| CN2754106Y (en) * | 2004-12-13 | 2006-01-25 | 宝钢集团上海梅山有限公司 | Simple high-power silicon controlled rectifier measuring instrument |
| CN200982994Y (en) * | 2006-12-12 | 2007-11-28 | 天津市诺尔电气有限公司 | Controllable silicon triggered current detection alarming circuit |
Non-Patent Citations (2)
| Title |
|---|
| 先明.可控硅触发特性参数测试仪的设计与制作.成都大学学报（自然科学版）14 2.1995,14(2),58-60. |
| 先明.可控硅触发特性参数测试仪的设计与制作.成都大学学报(自然科学版)14 2.1995,14(2),58-60. * |
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| CN1975446A (en) | 2007-06-06 |
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Owner name: TIANJIN NOLE ELECTRICITY CO., LTD. Free format text: FORMER NAME: TIANJIN NUOERHADUN ELECTRIC CO., LTD. Owner name: TIANJIN NUOERHADUN ELECTRIC CO., LTD. Free format text: FORMER NAME: TIANJIN NOLE ELECTRICITY CO., LTD. |
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Address after: 300385 Tianjin City Economic Development Zone Xiqing Dasi Industrial Park Jintai Road No. 6 Patentee after: TIANJIN NOLE ELECTRIC Co.,Ltd. Address before: 300385 Tianjin City Economic Development Zone Xiqing Dasi Industrial Park Jintai Road No. 6 Patentee before: Tianjin Knoll Hatton Electric Co.,Ltd. |
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Address after: 300385 Tianjin City Economic Development Zone Xiqing Dasi Industrial Park Jintai Road No. 6 Patentee after: Tianjin Knoll Hatton Electric Co.,Ltd. Address before: 300385 Tianjin City, Xiqing Economic Development Zone Industrial Park Ze Road No. 20 Hung Temple Patentee before: Tianjin Nuoerhatun Electric Manufacturing Co.,Ltd. |
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