CN102751142A - Power supply control circuit for relay driving module - Google Patents
Power supply control circuit for relay driving module Download PDFInfo
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- CN102751142A CN102751142A CN2012102454207A CN201210245420A CN102751142A CN 102751142 A CN102751142 A CN 102751142A CN 2012102454207 A CN2012102454207 A CN 2012102454207A CN 201210245420 A CN201210245420 A CN 201210245420A CN 102751142 A CN102751142 A CN 102751142A
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Abstract
The invention relates to a power supply control circuit for a relay driving module, which comprises a processor; the processor outputs a power supply control signal used for controlling power supply of a relay driving circuit, and a relay control signal used for controlling on and off of a first relay coil; a power supply control module is arranged between a first relay controlled power supply node and the processor; the power supply control module consists of a low level trigger unit and a second relay connected with an output end of the low level trigger unit; one end of an output circuit of the second relay is connected with a power supply used for supplying power for the relay driving circuit, and the other end of the output circuit of the second relay is connected with the controlled power supply node which is arranged in a first relay and used for supplying power for the relay driving circuit; and the processor is set with default codes. The power supply control circuit effectively prevents equipment from being powered on or off and the malfunction of a relay caused by the external disturbance.
Description
Technical field
The present invention relates to a kind of power control circuit that is used for relay driving module, 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 power control circuit that is used for relay driving module, this power control circuit 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 power control circuit that is used for relay driving module, said relay driving module comprise the relay driving module that is used to control this first relay that is connected to first relay; Also comprise:
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 first relay controlled source node 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; Said second relay normally open contact, one end is connected with the power supply that is used for to the power supply of said relay drive circuit, is used for the controlled source node that relay drive circuit supplies power in this second relay normally open contact other end and said first relay and is connected;
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.
Further improvement project is following in the technique scheme:
In the such scheme, also comprise high level trigger element and the 3rd relay that is connected with high level trigger element output in the said energy supply control module; This 3rd relay is between said second relay and controlled source node;
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.
Because the technique scheme utilization, the present invention compared with prior art has advantage and effect:
The present invention is used for the power control circuit of relay driving module, 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 2 is power control circuit circuit diagram 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 power control circuit that is used for relay driving module, said relay driving module comprise the relay driving module 1 that is used to control this first relay R LY3 that is connected to the first relay R LY3; Also comprise:
Be provided with energy supply control module 2 between said first relay R LY3 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, the second relay R LY1 that is connected with low level trigger element 21 outputs; The said second relay R LY1 normally opened contact, one 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 second relay R LY1 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 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, and another input of the said first comparator U1 receives preset coding; The 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.
Also comprise high level trigger element 22 and the 3rd relay R LY2 that is connected with high level trigger element 22 outputs in the above-mentioned energy supply control module 2; This 3rd relay R LY2 is between said second relay R LY1 and controlled source node CTL_24V;
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, and another input of the 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 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.
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 and the consistent power control signal of 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 value, 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 coding, is Binary Zero 101 like figure.When power control signal IO_A3 ~ IO_A0 sends 0101; Consistent with preset coding, 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, and controlled source node CTL_24V is an open-circuit condition; This moment, output relay module 1 controlled source was opened a way, and the first output relay RLY3 is 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 the afterflow passage.The first triode Q3 only is operated in saturated and cut-off state, need select suitable current-limiting resistance R9, R10 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 (2)
1. power control circuit that is used for relay driving module, said relay driving module comprises the relay driving module (1) that is used to control this first relay (RLY3) that is connected to first relay (RLY3); It is characterized in that: also comprise:
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;
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; Said second relay (RLY1) normally opened contact one end is connected with the power supply (24V) that is used for to said relay drive circuit (1) power supply, is used for the controlled source node (CTL_24V) that relay drive circuit (1) supplies power in this second relay (RLY1) normally opened contact other end and said first relay and is connected;
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).
2. power control circuit according to claim 1 is characterized in that: also comprise high level trigger element (22) and the 3rd relay (RLY2) that is connected with high level trigger element (22) output in the said energy supply control module (2); This 3rd relay (RLY2) is positioned between said second relay (RLY1) and the controlled source node (CTL_24V);
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102454207A CN102751142A (en) | 2012-07-16 | 2012-07-16 | Power supply control circuit for relay driving module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102454207A CN102751142A (en) | 2012-07-16 | 2012-07-16 | Power supply control circuit for relay driving module |
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| CN102751142A true CN102751142A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102454207A Pending CN102751142A (en) | 2012-07-16 | 2012-07-16 | Power supply control circuit for relay driving module |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957157A (en) * | 2012-11-27 | 2013-03-06 | 常州市宏大电气有限公司 | Silicon controlled composite switch of intelligent zero-crossing switching |
| CN103023044A (en) * | 2012-11-27 | 2013-04-03 | 常州市宏大电气有限公司 | Combination switch with intelligent zero-crossing switching function |
| CN104835685A (en) * | 2015-05-04 | 2015-08-12 | 广东美的厨房电器制造有限公司 | Relay control circuit |
| 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 |
| CN110708051A (en) * | 2019-09-18 | 2020-01-17 | 安徽南瑞中天电力电子有限公司 | Switch control logic circuit |
| CN111579631A (en) * | 2020-06-11 | 2020-08-25 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
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| CN2246355Y (en) * | 1995-04-27 | 1997-01-29 | 庄敬文 | Electronic relay device |
| CN1722928A (en) * | 2005-06-09 | 2006-01-18 | 华东师范大学 | Soft-startup large power DC light source |
| CN102136395A (en) * | 2011-01-11 | 2011-07-27 | 国电南京自动化股份有限公司 | Automatic device system |
| CN201927154U (en) * | 2011-01-14 | 2011-08-10 | 北华航天工业学院 | Bridge safety warning system |
| JP2011229099A (en) * | 2010-04-23 | 2011-11-10 | Onkyo Corp | Power supply control device |
| CN202749303U (en) * | 2012-07-16 | 2013-02-20 | 苏州工业园区和顺电气股份有限公司 | Power control circuit for relay driving module |
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2012
- 2012-07-16 CN CN2012102454207A patent/CN102751142A/en active Pending
Patent Citations (6)
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| CN2246355Y (en) * | 1995-04-27 | 1997-01-29 | 庄敬文 | Electronic relay device |
| CN1722928A (en) * | 2005-06-09 | 2006-01-18 | 华东师范大学 | Soft-startup large power DC light source |
| JP2011229099A (en) * | 2010-04-23 | 2011-11-10 | Onkyo Corp | Power supply control device |
| CN102136395A (en) * | 2011-01-11 | 2011-07-27 | 国电南京自动化股份有限公司 | Automatic device system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957157A (en) * | 2012-11-27 | 2013-03-06 | 常州市宏大电气有限公司 | Silicon controlled composite switch of intelligent zero-crossing switching |
| CN103023044A (en) * | 2012-11-27 | 2013-04-03 | 常州市宏大电气有限公司 | Combination switch with intelligent zero-crossing switching function |
| CN102957157B (en) * | 2012-11-27 | 2015-04-08 | 常州市宏大电气有限公司 | Silicon controlled composite switch of intelligent zero-crossing switching |
| CN104835685A (en) * | 2015-05-04 | 2015-08-12 | 广东美的厨房电器制造有限公司 | Relay control circuit |
| 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 |
| CN110708051A (en) * | 2019-09-18 | 2020-01-17 | 安徽南瑞中天电力电子有限公司 | Switch control logic circuit |
| CN111579631A (en) * | 2020-06-11 | 2020-08-25 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
| CN111579631B (en) * | 2020-06-11 | 2021-04-27 | 中国地质大学（武汉） | Interface conversion circuit of plasma mass spectrometer driven by laser ablation system |
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Application publication date: 20121024 |