CN102751143A - Control circuit for relay - Google Patents
Control circuit for relay Download PDFInfo
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- CN102751143A CN102751143A CN2012102454599A CN201210245459A CN102751143A CN 102751143 A CN102751143 A CN 102751143A CN 2012102454599 A CN2012102454599 A CN 2012102454599A CN 201210245459 A CN201210245459 A CN 201210245459A CN 102751143 A CN102751143 A CN 102751143A
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Abstract
The invention relates to a control circuit for a relay. The control circuit comprises a first relay and a relay driving circuit, wherein the relay driving circuit comprises a first photoelectric coupler and a first triode; one input end of the first photoelectric coupler is used for receiving a relay control signal; the relay control signal is used for controlling the on and off of a first relay coil; a power supply control module is arranged between a power supply input end of the relay and a processor; the power supply control module is composed of a low level triggering unit, a second relay, a high level triggering unit and a third relay; the second relay is connected with an output end of the low level triggering unit; the third relay is connected with an output end of the high level triggering unit; the second relay and the third relay are connected in series through respective output loops; the other end of the output loop of the second relay is connected with a power supply circuit of the relay driving circuit; and the other end of the output loop of the third relay is connected with an input end of the first relay. With the adoption of the control circuit, the power-on or power-off of a device and the false operation of the relay caused by external interference are prevented effectively.
Description
Technical field
The present invention relates to a kind of control circuit that is used for relay, belong to relay control field.
Background technology
Relay is a kind of device that is in daily use in control system, is used to realize the control of multiple actuator, and utilization is simple, reliable.In the prior art, common relay drive circuit is to control one to one, i.e. the control of corresponding one road output relay of one road IO signal.In practical application, often run into following problem: (1) device power need be made an appointment with the initialization time of a few tens of milliseconds, and the state of IO signal is uncertain during this period; (2) moment of device looses power because the existence of energy-storage travelling wave tube in the circuit, often processor dead electricity stop control, peripheral IO still is in unsettled operating state; (3) the residing circumstance complication of equipment, control signal is subject to the influence of external electromagnetic interference.More than three kinds of situation, IO often is in uncontrolled or stochastic regime, or follows the appearance of burr and pulse, these all can cause the misoperation of output relay misoperation and outside actuator.
Summary of the invention
The purpose of this invention is to provide a kind of control circuit that is used for relay, this control circuit that is used for relay can prevent effectively that the relay misoperation that device power, power down and external interference cause from doing, facts have proved reliable and stable, simple possible.
For achieving the above object, the technical scheme that the present invention adopts is: a kind of control circuit that is used for relay comprises one first relay and the relay drive circuit that is used to control this relay; This relay drive circuit comprises first photoelectrical coupler, is used to drive first triode of said first relay; The said first photoelectrical coupler input receives the relay control signal that is used to control the first relay coil break-make; The first photoelectrical coupler output loop, one end is connected to the first relay power input and first relay coil, one end; The other end is connected to the first triode input circuit of being made up of base stage and collector electrode; Emitter is connected to the coil other end in the relay in this first triode input circuit, grounded collector in the first triode input circuit;
Processor, its output are used for the power control signal and the relay control signal that is used to control the first relay coil break-make of control relay drive circuitry;
Be provided with energy supply control module between said relay power input and the said processor, this energy supply control module is made up of low level trigger element, second relay that is connected with low level trigger element output, high level trigger element and the 3rd relay that is connected with high level trigger element output; Said second relay and the 3rd relay normally opened contact separately are connected in series; This second relay normally open contact other end is connected with said relay drive circuit power supply; This 3rd relay normally open contact other end is connected with the said first relay power input, and said processor is provided with preset coding;
Said low level trigger element comprises first comparator, second photoelectrical coupler that is connected with first comparator, is used to drive second triode of said second relay; Said first comparator, one input receives the power control signal that is used for the control relay drive circuitry of from processor, and another input of said first comparator receives preset coding; The second photoelectrical coupler output loop, one end is connected to coil one end in second relay power and second relay, is provided with second triode that works in saturated or cut-off state in the second photoelectrical coupler output loop other end and second relay between the coil other end;
The 3rd triode that said high level trigger element comprises second comparator, the 3rd photoelectrical coupler that is connected with second comparator, is used to drive said the 3rd relay and works in saturated or cut-off state; Said second comparator, one input receives the power control signal that is used for the control relay drive circuit of from processor, and another input of said second comparator receives preset coding; Be provided with an inverter between said second comparator and the 3rd photoelectrical coupler; Two outputs of the 3rd photoelectrical coupler are connected respectively to base stage and the collector electrode in said the 3rd triode input circuit, and one the 3rd resistance is arranged in the 3rd relay power and the second relay coil, one end; Said the 3rd triode output loop one end is connected to said the 3rd relay coil, the 3rd triode output loop other end ground connection.
Further improvement project is following in the technique scheme:
1, in the such scheme, one the 3rd diode is parallelly connected with said relay, and this 3rd diode cathode is connected to said the 3rd triode output loop, and this 3rd diode cathode is connected to said relay power input; One the 7th electric capacity cross-over connection is in the said first photoelectrical coupler output loop two ends.
2, in the such scheme, one first diode is parallelly connected with said second relay, and this first diode cathode is connected to the said second triode output loop, and this first diode cathode is connected to said second relay power.
3, in the such scheme, one the 3rd electric capacity cross-over connection is in said photoelectrical coupler output loop two ends.
4, in the such scheme, one second diode is parallelly connected with said the 3rd relay, and this second diode cathode is connected to said the 3rd triode output loop, and this second diode cathode is connected to said the 3rd relay power.
5, in the such scheme, one the 4th electric capacity cross-over connection is in said the 3rd photoelectrical coupler output loop two ends.
Because the technique scheme utilization, the present invention compared with prior art has advantage and effect:
The present invention is used for the control circuit of relay, can prevent effectively that the relay misoperation that device power, power down and external interference cause from doing, facts have proved reliable and stable, simple possible; Secondly, power control circuit is divided into low level trigger element, two loops of high level trigger element, on hardware designs, has improved the redundancy of control.
Description of drawings
Accompanying drawing 1 is used for the control circuit electrical schematic diagram of relay for the present invention;
Accompanying drawing 2 is energy supply control module circuit diagram in the control circuit of the present invention;
Accompanying drawing 3 is relay drive circuit electrical schematics of the present invention.
In the above accompanying drawing: 1, relay drive circuit; 2, energy supply control module; 21, low level trigger element; 22, high level trigger element; 3, power supply; 4, processor.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Embodiment: a kind of control circuit that is used for relay comprises one first relay R LY3 and the relay drive circuit 1 that is used to control this relay; This relay drive circuit 1 comprises the first photoelectrical coupler U6, is used to drive the first triode Q3 of the said first relay R LY3; The said first photoelectrical coupler U6 input receives the relay control signal that is used to control the first relay R LY3 coil break-make; The first photoelectrical coupler U6 output loop, one end is connected to the first relay power input CTL and the first relay R LY3 coil, one end; The other end is connected to the first triode Q3 input circuit of being made up of base stage and collector electrode; Emitter is connected to the coil other end in the relay in this first triode Q3 input circuit, grounded collector in the first triode Q3 input circuit;
Be provided with energy supply control module 2 between said relay power input CTL and the said processor, this energy supply control module 2 is made up of low level trigger element 21, the second relay R LY1 that is connected with low level trigger element 21 outputs, high level trigger element 22 and the 3rd relay R LY2 that is connected with high level trigger element 22 outputs; The said second relay R LY1 and the 3rd relay R LY2 are separately
Normally opened contactBe connected in series this second relay R LY1
Normally opened contactThe other end is connected with said relay drive circuit 1 power supply, this 3rd relay R LY2
Normally opened contactThe other end is connected with the said first relay power input CTL, and said processor is provided with preset coding;
Said low level trigger element 21 comprises the first comparator U1, the second photoelectrical coupler U4 that is connected with the first comparator U1, is used to drive the second triode Q1 of the said second relay R LY1; The said first comparator U1, one input receives the power control signal that is used for the control relay drive circuitry of from processor, said first another input of comparator U1
Receive preset codingThe second photoelectrical coupler U4 output loop, one end is connected to coil one end among the second relay R LY1 power supply and the second relay R LY1, is provided with the second triode Q1 that works in saturated or cut-off state among the second photoelectrical coupler U4 output loop other end and the second relay R LY1 between the coil other end;
The 3rd triode Q2 that said high level trigger element 22 comprises the second comparator U2, the 3rd photoelectrical coupler U5 that is connected with the second comparator U2, is used to drive said the 3rd relay R LY2 and works in saturated or cut-off state; The said second comparator U2, one input receives the power control signal that is used for the control relay drive circuit of from processor, said second another input of comparator U2
Receive preset codingBe provided with an inverter U3 between said second comparator U2 and the 3rd photoelectrical coupler U5; Two outputs of the 3rd photoelectrical coupler U5 are connected respectively to base stage and the collector electrode in said the 3rd triode Q2 input circuit, and one the 3rd resistance R 3 is arranged in the 3rd relay R LY2 power supply and the second relay R LY1 coil, one end; Said the 3rd triode Q2 output loop one end is connected to said the 3rd relay R LY2 coil, the 3rd triode Q2 output loop other end ground connection.
One the 3rd diode D3 is parallelly connected with said relay R LY3; This 3rd diode D3 positive pole is connected to said the 3rd triode Q3 output loop; This 3rd diode D3 negative pole is connected to said relay power input CTL, and the 3rd diode D3 is the fly-wheel diode of the first relay R LY3 coil; 7 cross-over connections of one the 7th capacitor C are in the said first photoelectrical coupler U6 output loop two ends.
One first diode D1 is parallelly connected with the said second relay R LY1; This first diode D1 positive pole is connected to the said second triode Q1 output loop; This first diode D1 negative pole is connected to the said second relay R LY1 power supply, and the first diode D1 is the fly-wheel diode of the second relay R LY1 coil.
3 cross-over connections of one the 3rd capacitor C are in said photoelectrical coupler U6 output loop two ends.
One second diode D2 is parallelly connected with said the 3rd relay R LY2; This second diode D2 positive pole is connected to said the 3rd triode Q2 output loop; This second diode D2 negative pole is connected to said the 3rd relay R LY2 power supply, and the second diode D2 is the fly-wheel diode of the 3rd relay R LY2 coil.
4 cross-over connections of one the 4th capacitor C are in said the 3rd photoelectrical coupler U5 output loop two ends.
The foregoing course of work is following.
As attach shown in Fig. 1 and 2, increase energy supply control module 2 in relay control module 1 prime.When needs are controlled the first output relay RLY3; Processor sends the consistent power control signal of a certain preset coding; Trigger loop 21 through low level in the energy supply control module 2 and trigger the acting in conjunction in loop 22 with high level; Controlled source node CTL_24V is communicated to power supply 24V, and promptly relay control module 1 must be electric, and the first output relay RLY3 is exported the direct control of control IO signal IO_B0.In the time need not controlling, the power control signal of processor is set to non-preset encoded radio, relay control module 1 dead electricity then, and the first output relay RLY3 is in uncontrolled state.
The low level of energy supply control module 2 triggers in the loop 21, and the A mouth of the first comparator U1 meets the power control signal IO_A3 ~ IO_A0 of processor, and the B mouth connects preset encoded radio, is Binary Zero 101 like figure.When power control signal IO_A3 ~ IO_A0 sends 0101; Consistent with preset encoded radio, the first comparator U1 output low level then, 2 pin of the second optocoupler U4 are low level; The optocoupler conducting; The ground level of the second triode Q1 flows into forward current and is in saturation condition, drives the second relay R LY1 coil and gets electricly, and the normally opened contact of the second relay R LY1 is closed.
High level triggers in the loop 22, and the A mouth of the second comparator U2 meets the power control signal IO_A7 ~ IO_A4 of processor, and the B mouth connects preset coding, is Binary Zero 011 like figure.When power control signal IO_A7 ~ IO_A4 sent 0011, coding was consistent with presetting, then the second comparator U2 output low level; Convert high level to through the first inverter U3; 2 religions of the 3rd optocoupler U5 are high level, and optocoupler ends, and the ground level of the 3rd diode Q2 flows into forward current and is in saturation condition; Drive the 3rd relay R LY2 coil and get electricly, the normally opened contact of the 3rd relay R LY2 is closed.
When power control signal IO_A7 ~ IO_A0 sends 00110101; Trigger loop 21 through low level and trigger loop 22 actings in conjunction with high level; The second relay R LY1 and the 3rd relay R LY2 move simultaneously; Power supply 24V and controlled source node CTL_24V connect, and output relay module 1 gets electric, and then the first output relay RLY3 is exported the direct control of control signal IO_B0.On the contrary; When power control signal IO_A7 ~ IO_A0 is non-00110101 the time; Then the second relay R LY1 and the 3rd relay R LY2 can not move simultaneously; Controlled source node CTL_24V is an open-circuit condition, and this moment, output relay module 1 controlled source was opened a way the first output relay RLY3) not controlled.
In the output relay module, the first diode D3 is connected anti-parallel in the first output relay RLY3 coil, for coil current provides current by pass.The first triode Q3 only is operated in saturated and cut-off state, need select suitable current-limiting resistance R9R10 through calculating for this reason.First capacitor C 6 is parallel to the first optocoupler input, is input end signal filtering, and second capacitor C 7 is parallel to the first optocoupler output, is output end signal filtering.Each components and parts effect is similar in the energy supply control module.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1. control circuit that is used for relay comprises one first relay (RLY3) and is used to control the relay drive circuit (1) of this relay; This relay drive circuit (1) comprises first photoelectrical coupler (U6) that is used for Signal Spacing, first triode (Q3) that is used to drive said first relay (RLY3); Said first photoelectrical coupler (U6) input receives the relay control signal that is used to control first relay (RLY3) coil break-make; First photoelectrical coupler (U6) output loop, one end is connected to first relay (RLY3) controlled source node (CTL_24V) and first relay (RLY3) coil, one end; The other end is connected to first triode (Q3) input circuit of being made up of base stage and collector electrode; Emitter is connected to the coil other end in the relay in this first triode (Q3) input circuit, grounded collector in first triode (Q3) input circuit;
Processor (4), its output are used for the power control signal and the relay control signal that is used to control first relay (RLY3) coil break-make of control relay drive circuitry;
It is characterized in that: be provided with energy supply control module (2) between said first relay (RLY3) controlled source node (CTL_24V) and the said processor (4), this energy supply control module (2) is made up of low level trigger element (21), second relay (RLY1) that is connected with low level trigger element (21) output, high level trigger element (22) and the 3rd relay (RLY2) that is connected with high level trigger element (22) output; Said second relay (RLY1) and the 3rd relay (RLY2) normally opened contact separately are connected in series; This second relay (RLY1) normally opened contact other end is connected with the power supply (24V) that is used for to said relay drive circuit (1) power supply; The controlled source node (CTL_24V) that is used for relay drive circuit (1) power supply in this 3rd relay (RLY2) normally opened contact other end and said first relay is connected, and said processor is provided with preset the coding;
Said low level trigger element (21) comprises first comparator (U1), second photoelectrical coupler (U4) that is connected with first comparator (U1), is used to drive second triode (Q1) of said second relay (RLY1); Said first comparator (U1) input receives the power control signal that is used for the control relay drive circuitry of from processor, and another input of said first comparator (U1) receives preset coding; Second photoelectrical coupler (U4) output loop, one end is connected to coil one end in second relay (RLY1) power supply and second relay (RLY1), is provided with second triode (Q1) that works in saturated or cut-off state between the coil other end in second photoelectrical coupler (U4) the output loop other end and second relay (RLY1);
Said high level trigger element (22) comprises second comparator (U2), the 3rd photoelectrical coupler (U5) that is connected with second comparator (U2), be used to the 3rd triode (Q2) that drives said the 3rd relay (RLY2) and work in saturated or cut-off state; Said second comparator (U2) input receives the power control signal that is used for the control relay drive circuit of from processor, and another input of said second comparator (U2) receives preset coding; Be provided with an inverter (U3) between said second comparator (U2) and the 3rd photoelectrical coupler (U5); Two outputs of the 3rd photoelectrical coupler (U5) are connected respectively to base stage and the collector electrode in said the 3rd triode (Q2) input circuit, and one the 3rd resistance (R3) is arranged in the 3rd relay (RLY2) power supply and second relay (RLY1) coil, one end; Said the 3rd triode (Q2) output loop one end is connected to said the 3rd relay (RLY2) coil, the 3rd triode (Q2) output loop other end ground connection.
2. control circuit according to claim 1; It is characterized in that: one the 3rd diode (D3) is parallelly connected with said relay (RLY3); This 3rd diode (D3) positive pole is connected to said the 3rd triode (Q3) output loop, and this 3rd diode (D3) negative pole is connected to said relay power input (CTL); One the 7th electric capacity (C7) cross-over connection is in said first photoelectrical coupler (U6) output loop two ends.
3. control circuit according to claim 1 and 2; It is characterized in that: one first diode (D1) is parallelly connected with said second relay (RLY1); This first diode (D1) positive pole is connected to said second triode (Q1) output loop, and this first diode (D1) negative pole is connected to said second relay (RLY1) power supply.
4. control circuit according to claim 1 and 2 is characterized in that: one the 3rd electric capacity (C3) cross-over connection is in said photoelectrical coupler (U6) output loop two ends.
5. control circuit according to claim 1 and 2; It is characterized in that: one second diode (D2) is parallelly connected with said the 3rd relay (RLY2); This second diode (D2) positive pole is connected to said the 3rd triode (Q2) output loop, and this second diode (D2) negative pole is connected to said the 3rd relay (RLY2) power supply.
6. control circuit according to claim 1 and 2 is characterized in that: one the 4th electric capacity (C4) cross-over connection is in said the 3rd photoelectrical coupler (U5) output loop two ends.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210245459.9A CN102751143B (en) | 2012-07-16 | 2012-07-16 | Control circuit for relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210245459.9A CN102751143B (en) | 2012-07-16 | 2012-07-16 | Control circuit for relay |
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| CN102751143A true CN102751143A (en) | 2012-10-24 |
| CN102751143B CN102751143B (en) | 2014-12-10 |
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| CN201210245459.9A Active CN102751143B (en) | 2012-07-16 | 2012-07-16 | Control circuit for relay |
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| CN102969200A (en) * | 2012-11-05 | 2013-03-13 | 北京易艾斯德科技有限公司 | High-reliable single-chip microcomputer control relay device |
| CN103021051A (en) * | 2012-11-19 | 2013-04-03 | 深圳光启创新技术有限公司 | Photovoltaic triggering circuit, optical signal receive control equipment and decoding method thereof |
| CN104206369A (en) * | 2014-08-26 | 2014-12-17 | 济南祥辰科技有限公司 | Anti-electric-shock frequency oscillation insect-killing lamp |
| CN104767505A (en) * | 2015-03-26 | 2015-07-08 | 成都力鑫科技有限公司 | Switching circuit with circuit protection function |
| CN105845510A (en) * | 2016-05-30 | 2016-08-10 | 常州市松泽电器有限公司 | Electromagnetic switch |
| CN106816945A (en) * | 2017-03-24 | 2017-06-09 | 淮安信息职业技术学院 | A kind of GPRS terminals accessory power supply switching control system and its control method |
| CN107978488A (en) * | 2017-11-27 | 2018-05-01 | 江苏现代电力科技股份有限公司 | A kind of relay |
| CN108461353A (en) * | 2018-05-10 | 2018-08-28 | 王汉禄 | Composite solid type relay |
| CN110033986A (en) * | 2019-05-21 | 2019-07-19 | 安图实验仪器(郑州)有限公司 | Has the control relay circuit for extending relay service life |
| CN110597163A (en) * | 2019-08-20 | 2019-12-20 | 西安航天动力技术研究所 | Encoding control power supply circuit for launch control system |
| CN110867343A (en) * | 2019-11-20 | 2020-03-06 | 广州金升阳科技有限公司 | Contactor coil isolation control circuit and isolation control method thereof |
| CN114301164A (en) * | 2021-11-25 | 2022-04-08 | 北京百度网讯科技有限公司 | Data center diesel generating set and control system thereof |
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| CN106816945A (en) * | 2017-03-24 | 2017-06-09 | 淮安信息职业技术学院 | A kind of GPRS terminals accessory power supply switching control system and its control method |
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| CN108461353A (en) * | 2018-05-10 | 2018-08-28 | 王汉禄 | Composite solid type relay |
| CN108461353B (en) * | 2018-05-10 | 2019-08-27 | 王汉禄 | Composite solid type relay |
| CN110033986A (en) * | 2019-05-21 | 2019-07-19 | 安图实验仪器(郑州)有限公司 | Has the control relay circuit for extending relay service life |
| CN110033986B (en) * | 2019-05-21 | 2024-02-20 | 安图实验仪器(郑州)有限公司 | Relay control circuit with function of prolonging service life of relay |
| CN110597163A (en) * | 2019-08-20 | 2019-12-20 | 西安航天动力技术研究所 | Encoding control power supply circuit for launch control system |
| CN110867343A (en) * | 2019-11-20 | 2020-03-06 | 广州金升阳科技有限公司 | Contactor coil isolation control circuit and isolation control method thereof |
| CN114301164A (en) * | 2021-11-25 | 2022-04-08 | 北京百度网讯科技有限公司 | Data center diesel generating set and control system thereof |
| CN114301164B (en) * | 2021-11-25 | 2024-05-10 | 北京百度网讯科技有限公司 | Data center diesel generator set and control system thereof |
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| CN102751143B (en) | 2014-12-10 |
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