CN106653482B - Self-correcting relay anti-adhesion circuit and its control method - Google Patents
Self-correcting relay anti-adhesion circuit and its control method Download PDFInfo
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- CN106653482B CN106653482B CN201610969802.2A CN201610969802A CN106653482B CN 106653482 B CN106653482 B CN 106653482B CN 201610969802 A CN201610969802 A CN 201610969802A CN 106653482 B CN106653482 B CN 106653482B
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- relay
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- resistance
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- optocoupler
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
Abstract
The invention discloses a kind of self-correcting relay anti-adhesion circuit and its control methods, voltage zero-crossing signal Acquisition Circuit, the voltage zero-cross feedback signal Acquisition Circuit, relay drive circuit being connected including processor module and respectively with the processor module, the voltage zero-crossing signal Acquisition Circuit includes optocoupler U1, resistance R1 and resistance R2, and the relay drive circuit includes resistance R11, resistance R14, resistance R66, diode D11, triode Q2 and relay U12；The voltage zero-cross feedback signal Acquisition Circuit includes resistance R19, resistance R23, resistance R24, diode D10 and optocoupler U11.This system detection voltage zero-cross and zero passage voltage feedback are all isolated using isolation optocoupler, and the anti-interference ability of circuit can be enhanced.
Description
Technical field
The present invention relates to anti-sticking connection circuit application field, in particular to a kind of self-correcting relay anti-adhesion circuit and its control
Method processed.
Background technique
Currently, intelligent switch generally uses power relay as the switching device of alternating current, pass through control relay
Whether turn-on and turn-off are powered to control to load.When the various different loads of relay driving, it is attracted, disconnects in relay contacts
(being especially attracted) moment, the even greater electric current of several times in the case of nominal operation can be generated, excessive electric current makes relay
Electric shock generates electric arc in moment, situations such as adhesion, specific manifestation be relay life be greatly decreased and load it is constantly on can not
Shutdown is uncontrolled.
General solution:
1, the bigger relay of replacement rated current；
2, increase circuit in relay circuit and absorb energy, reduce the probability to stick together；
But above method can not be fully solved a possibility that relay sticks together, it is therefore desirable to a kind of better method
Solve the problems, such as this.
Summary of the invention
To solve the problems, such as above-mentioned background technique, it is anti-that the purpose of the present invention is to provide a kind of self-correcting relays
Adhesion circuit and its control method are all isolated using isolation optocoupler with reaching detection voltage zero-cross and zero passage voltage feedback,
The purpose of the anti-interference ability of circuit can be enhanced.
In order to achieve the above objectives, technical scheme is as follows:
Self-correcting relay anti-adhesion circuit, the electricity being connected including processor module and respectively with the processor module
Zero-signal Acquisition Circuit, voltage zero-cross feedback signal Acquisition Circuit, relay drive circuit are pressed through, the voltage zero-crossing signal is adopted
Collector includes optocoupler U1, resistance R1 and resistance R2, and the relay drive circuit includes resistance R11, resistance R14, resistance
R66, diode D11, triode Q2 and relay U12；The voltage zero-cross feedback signal Acquisition Circuit includes resistance R19, electricity
Hinder R23, resistance R24, diode D10 and optocoupler U11.
Preferably, one end of the resistance R1 connects firewire L, and the other end connects the foot 1 of the optocoupler U1, the optocoupler U1
Foot 2 connect zero curve N, the foot 3 of the optocoupler U1 is grounded, and the foot 4 of the optocoupler U1 connects the resistance R2 and crosses zero output electricity
V1 is pressed, the other end of the resistance R2 connects power supply VCC, and the zero passage output voltage V1 is connected with the processor module.
Preferably, the U11 is unidirectional optocoupler, and R23 is optocoupler output pull-up resistor.
The control method of self-correcting relay anti-adhesion circuit, which comprises the following steps:
After processor module receives closing relay order for the first time, opens processor and interrupt the trailing edge for capturing U1
Edge, and 60ms timer is opened, when detecting the signal edge of U1, into interruption, and the t1 that is delayed issues closing relay and refers to
It enables, and opens the edge that processor captures U11, the signal edge of U11 is detected after t2, this t2 is the adhesive action of relay
Time captures the rising edge edge of U1 after t3；
The voltage zero-cross half period is 10ms, so (10-t3)/2 is exactly the time difference of zero passage Yu U1 signal edge, U1 signal
Failing edge to zero passage next time need to through when (10-t3)/2+t3；
When next processor module receives closing relay order, opens processor and interrupt the trailing edge for capturing U1
Edge, and 60ms timer is opened, when detecting the signal edge of U1, into interruption, issued after (the 10-t3)/2+t3-t2 that is delayed
Relay instruction is closed, such relay contact is just just closed in next point of zero voltage, if 60ms timer overflows,
Direct closing relay；
After processor module, which receives, disconnects relay order, opens processor and interrupt the trailing edge edge for capturing U1, and
60ms timer is opened, when detecting the signal edge of U1, into interruption, and the t1 that is delayed is issued and is disconnected relay instruction, and
The edge that processor captures U11 is opened, the signal edge of U11 is detected after t4, this t4 is the release movement time of relay,
When next processor module receives and disconnects relay order, opens processor and interrupt the trailing edge edge for capturing U1, and open
60ms timer, into interruption, issues after (the 10-t3)/2+t3-t4 that is delayed when detecting the signal edge of U1 and closes relay
Device instruction, such relay contact are just just closed in next point of zero voltage.
Through the above technical solutions, a kind of self-correcting relay anti-adhesion circuit provided by the invention and its control method,
Detection voltage zero-cross and zero passage voltage feedback are all isolated using isolation optocoupler, and the anti-interference ability of circuit can be enhanced, and
It can be applicable in various types of load, relay is attracted and disconnects in zero passage, effectively prevents adhesion, increases the reliable of relay
Property and service life.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is a kind of structural block diagram of self-correcting relay anti-adhesion circuit disclosed in the embodiment of the present invention；
Fig. 2 is a kind of voltage zero-crossing signal acquisition of self-correcting relay anti-adhesion circuit disclosed in the embodiment of the present invention
The circuit diagram of circuit；
Fig. 3 is a kind of voltage zero-crossing signal acquisition of self-correcting relay anti-adhesion circuit disclosed in the embodiment of the present invention
The alternating current of circuit and the comparison diagram of V1 waveform；
Fig. 4 is a kind of relay drive circuit of self-correcting relay anti-adhesion circuit disclosed in the embodiment of the present invention
Circuit diagram；
Fig. 5 is a kind of voltage zero-cross feedback signal of self-correcting relay anti-adhesion circuit disclosed in the embodiment of the present invention
The circuit diagram of Acquisition Circuit；
Fig. 6 shows for a kind of structure of the control method of self-correcting relay anti-adhesion circuit disclosed in the embodiment of the present invention
It is intended to.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.
A kind of self-correcting relay anti-adhesion circuit provided by the invention, as shown in Figure 1, including processor module and difference
Voltage zero-crossing signal Acquisition Circuit, the voltage zero-cross feedback signal Acquisition Circuit, relay being connected with the processor module
Driving circuit；
As Figure 2-3, the voltage zero-crossing signal Acquisition Circuit includes optocoupler U1, resistance R1 and resistance R2, the electricity
The one end for hindering R1 connects firewire L, and the other end connects the foot 1 of the optocoupler U1, and the foot 2 of the optocoupler U1 connects zero curve N, the light
The foot 3 of coupling U1 is grounded, and the foot 4 of the optocoupler U1 connects the resistance R2 and zero passage output voltage V1, and the resistance R2's is another
End connects power supply VCC, and the zero passage output voltage V1 is connected with the processor module；
Its circuit theory: input signal L is alternating current firewire, and N is alternating current zero curve, and U1 is two-way optocoupler, and pressure difference reaches certain
Forward and reverse to be connected when voltage, resistance R1 is optocoupler input current-limiting resistance, and resistance R2 is the pull-up resistor of U1 output end,
The firewire of input terminal, when zero curve pressure difference is greater than certain value Vf, optocoupler U1 conducting, V1 exports low level；The firewire of input terminal, zero curve
When pressure difference is less than certain value Vf, optocoupler U1 is not turned on, and V1 exports high level；The function of the circuit is that alternating current is converted into V1, place
Reason device captures V1 and carries out calculation processing；
As shown in figure 4, the relay drive circuit includes resistance R11, resistance R14, resistance R66, diode D11, three
Pole pipe Q2 and relay U12, OUT1 are the command signal for the control relay closing or opening that processor issues, R11, R14, Q2
Composition driving relay circuit, 220L_OUT1 connection load end；
Its circuit theory: the circuit drives relay open and close issues OUT1 when processor needs closing relay
Signal is high level, and triode Q2 is connected, and relay crus secunda (signal OUT_E1) is pulled to low level, relay control coil two
The voltage difference at end is VDD, and relay closure, the 3rd foot of relay and the connection of the 4th foot, 220L are output to load by resistance R66
End, when processor need to disconnect relay, sending OUT1 signal is low level, triode Q2 cut-off, relay crus secunda (signal
OUT_E1) sport high level, the voltage difference at relay control coil both ends is 0, and relay disconnects, the 3rd foot of relay and
4th foot disconnects, and 220L can not be output to load end by resistance R66, controls whether load is powered by relay with this；
As shown in figure 5, the voltage zero-cross feedback signal Acquisition Circuit includes resistance R19, resistance R23, resistance R24, two
Pole pipe D10 and optocoupler U11, the U11 are unidirectional optocoupler, and R23 is optocoupler output pull-up resistor, and 220L_OUT1 is through relay
Device control output alternating current fire wire is connected to load end, and 220N is alternating current zero curve, and U11 is unidirectional optocoupler, and R23 is optocoupler output
Pull-up resistor is held, V2 is voltage zero-cross feedback signal, is connected to processor.
The control method of self-correcting relay anti-adhesion circuit, as shown in Figure 6, comprising the following steps:
After processor module receives closing relay order for the first time, opens processor and interrupt the trailing edge for capturing Ul
Edge, and 60ms timer is opened, when detecting the signal edge of U1, into interruption, and the t1 that is delayed issues closing relay and refers to
It enables, and opens the edge that processor captures U11, the signal edge of U11 is detected after t2, this t2 is the adhesive action of relay
Time captures the rising edge edge of U1 after t3；
The voltage zero-cross half period is 10ms, so (10-t3)/2 is exactly the time difference of zero passage Yu U1 signal edge, U1 signal
Failing edge to zero passage next time need to through when (10-t3)/2+t3；
When next processor module receives closing relay order, opens processor and interrupt the trailing edge for capturing U1
Edge, and 60ms timer is opened, when detecting the signal edge of U1, into interruption, issued after (the 10-t3)/2+t3-t2 that is delayed
Relay instruction is closed, such relay contact is just just closed in next point of zero voltage, if 60ms timer overflows,
Direct closing relay；
After processor module, which receives, disconnects relay order, opens processor and interrupt the trailing edge edge for capturing U1, and
60ms timer is opened, when detecting the signal edge of U1, into interruption, and the t1 that is delayed is issued and is disconnected relay instruction, and
The edge that processor captures U11 is opened, the signal edge of U11 is detected after t4, this t4 is the release movement time of relay,
When next processor module receives and disconnects relay order, opens processor and interrupt the trailing edge edge for capturing U1, and open
60ms timer, into interruption, issues after (the 10-t3)/2+t3-t4 that is delayed when detecting the signal edge of U1 and closes relay
Device instruction, such relay contact are just just closed in next point of zero voltage.
A kind of self-correcting relay anti-adhesion circuit and its control method disclosed by the invention detect voltage zero-cross and zero passage
Voltage Feedback all uses isolation optocoupler to be isolated, and can enhance the anti-interference ability of circuit, and can be applicable in various types
Load, in zero passage relay be attracted and disconnect, effectively prevent adhesion, increase the reliability and service life of relay.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (3)
1. self-correcting relay anti-adhesion circuit, which is characterized in that including processor module and respectively with the processor module
Voltage zero-crossing signal Acquisition Circuit, the voltage zero-cross feedback signal Acquisition Circuit, relay drive circuit being connected, the voltage
Zero cross signal Acquisition Circuit includes optocoupler Ul, resistance Rl and resistance R2, and the relay drive circuit includes resistance Rll, resistance
R14, resistance R66, diode D11, triode Q2 and relay U12；The voltage zero-cross feedback signal Acquisition Circuit includes electricity
Hinder R19, resistance R23, resistance R24, diode Dl0 and optocoupler Ull, the control method of circuit the following steps are included:
After processor module receives closing relay order for the first time, opens processor and interrupts the trailing edge edge for capturing U1,
And 60ms timer is opened, when detecting the signal edge of U1, into interruption, and the t1 that is delayed is issued and is closed relay instruction,
And the edge that processor captures Ull is opened, the signal edge of Ull is detected after t2, when this t2 is the adhesive action of relay
Between, the rising edge edge of U1 is captured after t3；
The voltage zero-cross half period is l0ms, so (10-t3)/2 is exactly the time difference of zero passage Yu Ul signal edge, under Ul signal
Drop along to zero passage next time need to through when (10-t3)/2+t3；
When next processor module receives closing relay order, opens processor and interrupt the trailing edge edge for capturing Ul, and
60ms timer is opened, when detecting the signal edge of U1, into interruption, issues and closes after (the 10-t3)/2+t3-t2 that is delayed
Relay instruction, such relay contact are just just closed in next point of zero voltage, if 60ms timer overflows, directly
Closing relay；
After processor module, which receives, disconnects relay order, opens processor and interrupt the trailing edge edge for capturing U1, and open
60ms timer, when detecting the signal edge of Ul, into interruption, and the tl that is delayed is issued and is disconnected relay instruction, and is opened
Processor captures the edge of Ull, the signal edge of Ull is detected after t4, this t4 is the release movement time of relay, under
When second processor module receives disconnection relay order, opens processor and interrupt the trailing edge edge for capturing Ul, and open 60ms
Timer, into interruption, issues disconnection relay after (the 10-t3)/2+t3-t4 that is delayed and refers to when detecting the signal edge of U1
It enables, such relay contact is just just disconnected in next point of zero voltage.
2. self-correcting relay anti-adhesion circuit according to claim 1, which is characterized in that one end of the resistance Rl connects
Start to exchange fire line L, and the other end connects the foot 1 of the optocoupler U1, and the foot 2 of the optocoupler Ul connects zero curve N, and the foot 3 of the optocoupler Ul connects
Ground, the foot 4 of the optocoupler Ul connect the other end connection power supply of the resistance R2 and zero passage output voltage Vl, the resistance R2
VCC, the zero passage output voltage Vl are connected with the processor module.
3. self-correcting relay anti-adhesion circuit according to claim 1, which is characterized in that the Ull is unidirectional optocoupler,
R23 is optocoupler output pull-up resistor.
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| CN201610969802.2A CN106653482B (en) | 2016-11-03 | 2016-11-03 | Self-correcting relay anti-adhesion circuit and its control method |
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| CN201610969802.2A CN106653482B (en) | 2016-11-03 | 2016-11-03 | Self-correcting relay anti-adhesion circuit and its control method |
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| CN106653482B true CN106653482B (en) | 2019-02-26 |
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| CN107658180B (en) * | 2017-09-27 | 2019-04-19 | 厦门芯阳科技股份有限公司 | It is a kind of can self study relay zero point arc-suppressing method and control relay circuit |
| CN107576930B (en) * | 2017-10-13 | 2019-12-13 | 华立科技股份有限公司 | power supply and relay status detection circuit and method |
| CN108231485B (en) * | 2018-01-31 | 2019-04-19 | 厦门芯阳科技股份有限公司 | A method of the relay zero point arc extinguishing with learning functionality |
| CN110797232B (en) * | 2019-09-26 | 2023-05-26 | 深圳市和玛科技有限公司 | Control method and circuit for preventing relay from adhering |
| CN112526199A (en) * | 2020-12-01 | 2021-03-19 | 广东鸿蓝智能科技有限公司 | Charging pile detection circuit capable of prolonging service life of relay and detection method thereof |
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| EP0571122A1 (en) * | 1992-05-20 | 1993-11-24 | Texas Instruments Incorporated | Method and apparatus for enhancing relay life |
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