CN204497150U - A kind of new type of relay circuit - Google Patents

A kind of new type of relay circuit Download PDF

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Publication number
CN204497150U
CN204497150U CN201520256551.4U CN201520256551U CN204497150U CN 204497150 U CN204497150 U CN 204497150U CN 201520256551 U CN201520256551 U CN 201520256551U CN 204497150 U CN204497150 U CN 204497150U
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CN
China
Prior art keywords
circuit
relay
mcu
input
resistance
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Expired - Fee Related
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CN201520256551.4U
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Chinese (zh)
Inventor
蒋平
周静
李旺辉
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Cloud Intelligence Science And Technology Ltd Of Man Of Shenzhen
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Cloud Intelligence Science And Technology Ltd Of Man Of Shenzhen
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Priority to CN201520256551.4U priority Critical patent/CN204497150U/en
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Abstract

The utility model discloses a kind of new type of relay circuit, comprise MCU, control relay circuit, ac zero-crossing detection circuit and AC feedback circuit, the control end of described control relay circuit is connected with the output of MCU, the output of control relay circuit is connected with the input of AC feedback circuit, the output of control relay circuit is also connected with a load, the output of AC feedback circuit is connected with the first input end of MCU, the output of ac zero-crossing detection circuit is connected with second input of MCU, the input of ac zero-crossing detection circuit and control relay circuit is alternating current input.The utility model has the advantage of: utilize two-way optocoupler to form and exchange zero-detection circuit and AC feedback circuit, realize relay and open zero point, effectively suppress relay to open spark and reach the effect extending relay life, and cost is low and structure is simple.

Description

A kind of new type of relay circuit
Technical field
The utility model relates to a kind of novel relay circuit.
Background technology
In control light class control technology, one of control of most critical is exactly cut-off control to different loads (capacitive, inductive load) and high power load.Because the moment resistance value that incandescent lamp loads is starting of capacitive load or cold conditions is very low, therefore in the moment that control load is connected, power supply can produce the phenomenon of near short circuit---and the impulse current of-moment is 10 times even 100 times when normally working, if this large electric current can produce very large heat by the contact of relay and directly burn out contact, cause relay contact adhesion, shorten the life-span of relay.So usually adopt the mode of Super-zero control to reduce impulse current to extend the life-span of relay.
Existing a kind of measure is that transformer isolation realizes detecting zero point, but because transformer is too large, and it is uneconomical, with on circuit boards, very occupy-place, cost is very high, although be connected in series the resistance of negative temperature coefficient in addition in circuit or these methods of inductance have certain effect, but or can not solve the problem of relay adhesion well, and parameter is not easy to determine.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of new type of relay circuit, effectively can reduce the impulse current that moment opened by relay, extend the life-span of relay, and cost is low and structure is simple.
For solving the problem, the technical scheme that the utility model adopts is as follows:
A kind of new type of relay circuit, it is characterized in that, comprise: MCU, control relay circuit, ac zero-crossing detection circuit and AC feedback circuit, the control end of described control relay circuit is connected with the output of MCU, the output of control relay circuit is connected with the input of AC feedback circuit, the output of control relay circuit is also connected with a load, the output of AC feedback circuit is connected with the first input end of MCU, the output of ac zero-crossing detection circuit is connected with second input of MCU, the input of ac zero-crossing detection circuit and control relay circuit is alternating current input.
Preferably, described control relay circuit comprises: triode, diode, relay and the first resistance, the base stage of described triode is connected with the output of MCU, the grounded emitter of triode, the collector electrode of triode is connected with the positive pole of diode, the negative pole of diode connects a 5V power supply, one end of the coil of relay connects the negative pole of diode, the other end of the coil of relay connects the positive pole of diode, the common port of relay is connected with live wire respectively with one end of the first resistance, the Chang Kaiduan of relay is connected with the other end of the first resistance and the input of AC feedback circuit respectively.
Preferably, described AC feedback circuit comprises: the first two-way optocoupler, the second resistance and the first electric capacity, the described first two-way first end of optocoupler primary circuit is connected with the output of control relay circuit, the first end of the first two-way optocoupler secondary circuit is connected with a 3.3V power supply by the second resistance, and by the first capacity earth, the first end of the first two-way optocoupler secondary circuit is also connected with the first input end of MCU, the second end ground connection of the first two-way optocoupler secondary circuit.
Preferably, described ac zero-crossing detection circuit comprises: the second two-way optocoupler, the 3rd resistance, the 4th resistance and the second electric capacity, the first end of described second two-way optocoupler primary circuit is connected with live wire by the 3rd resistance, the first end of the second two-way optocoupler secondary circuit is connected with a 3.3V power supply by the 4th resistance, and by the second capacity earth, the first end of the second two-way optocoupler secondary circuit is also connected with second input of MCU, the second end ground connection of the second two-way optocoupler secondary circuit.
Compared to existing technology, the beneficial effects of the utility model are: utilize two-way optocoupler to form and exchange zero-detection circuit and AC feedback circuit, realize relay to open zero point, effectively suppress relay to open spark and reach the effect extending relay life, and cost is low and structure is simple.
Accompanying drawing explanation
Fig. 1 is circuit structure diagram of the present utility model.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further:
Be a kind of new type of relay circuit of the present utility model with reference to figure 1, comprise: MCU, control relay circuit 1, ac zero-crossing detection circuit 2 and AC feedback circuit 3, control relay circuit 1 comprises triode Q1, diode D1, relay U1 and resistance R1, AC feedback circuit 3 comprises two-way optocoupler U2, resistance R2 and electric capacity C1, and ac zero-crossing detection circuit 2 comprises two-way optocoupler U3, resistance R3, resistance R4 and electric capacity C2.
The base stage of triode Q1 is connected with the output of MCU, the grounded emitter of triode Q1, the collector electrode of triode Q1 is connected with the positive pole of diode D1, the negative pole of diode D1 connects a 5V power supply, one end of relay U1 coil connects the negative pole of diode D1, the other end of relay U1 coil connects the positive pole of diode D2, the common port of relay U1 and one end of resistance R1 are connected with alternating current input (i.e. live wire L) respectively, the Chang Kaiduan of relay U1 is connected with the other end of resistance R1 and the first end (i.e. the 1st pin of two-way optocoupler U2) of two-way optocoupler U2 primary circuit respectively, the Chang Kaiduan of relay U1 is also connected with load.
Second end (the 2nd pin of two-way optocoupler U2) the connecting to neutral line N of two-way optocoupler U2 primary circuit, the first end (the 4th pin of two-way optocoupler U2) of two-way optocoupler U2 secondary circuit, be connected with a 3.3V power supply by resistance R2, and by electric capacity C1 ground connection, the first end of two-way optocoupler U2 secondary circuit is also connected with the first input end of MCU, the second end (the 3rd pin of the two-way optocoupler U2) ground connection of two-way optocoupler U2 secondary circuit.
Second end (the 2nd pin of two-way optocoupler U3) the connecting to neutral line N of two-way optocoupler U3 primary circuit, the first end (the 1st pin of two-way optocoupler U3) of two-way optocoupler U3 primary circuit is connected with alternating current input (i.e. live wire L) by resistance R3, the first end (the 4th pin of two-way optocoupler U3) of two-way optocoupler U3 secondary circuit is connected with a 3.3V power supply by resistance R4, and by electric capacity C2 ground connection, the first end of two-way optocoupler U3 secondary circuit is also connected with second input of MCU, second end (the 3rd pin of the two-way optocoupler U3) ground connection of two-way optocoupler U3 secondary circuit.
Based on above-mentioned circuit structure, its operation principle is as follows: the signal A that MCU is sent to control relay circuit according to its output and the signal B sent by AC feedback circuit received from first input end, show that MCU sends signal A to the time received between signal B, namely send time of delay when signal A closes to relay is actual, T1 will be designated as time of delay.MCU is a frequency from the signal C sent by ac zero-crossing detection circuit that the second input receives is the periodic signal of 100HZ, when alternating current is in point of zero voltage, signal C just triggers, by the very TB cycle time of signal C, relative to the opening time T2 of AC zero point, T2=TB-T1 next time when then can show that relay works.Namely MCU only needs to postpone the T2 time and sends signal A relay can be made to realize opening zero point next time, effectively suppress relay to be opened effect that spark reaches prolongation relay life.
The utility model has the advantage of: utilize two-way optocoupler to form and exchange zero-detection circuit and AC feedback circuit, realize relay and open zero point, effectively suppress relay to open spark and reach the effect extending relay life, and cost is low and structure is simple.
To one skilled in the art, according to technical scheme described above and design, other various corresponding change and deformation can be made, and all these change and deformation all should belong within the protection range of the utility model claim.

Claims (4)

1. a new type of relay circuit, it is characterized in that, comprise: MCU, control relay circuit, ac zero-crossing detection circuit and AC feedback circuit, the control end of described control relay circuit is connected with the output of MCU, the output of control relay circuit is connected with the input of AC feedback circuit, the output of control relay circuit is also connected with a load, the output of AC feedback circuit is connected with the first input end of MCU, the output of ac zero-crossing detection circuit is connected with second input of MCU, the input of ac zero-crossing detection circuit and control relay circuit is alternating current input.
2. new type of relay circuit according to claim 1, it is characterized in that, described control relay circuit comprises: triode, diode, relay and the first resistance, the base stage of described triode is connected with the output of MCU, the grounded emitter of triode, the collector electrode of triode is connected with the positive pole of diode, the negative pole of diode connects a 5V power supply, one end of the coil of relay connects the negative pole of diode, the other end of the coil of relay connects the positive pole of diode, the common port of relay is connected with live wire respectively with one end of the first resistance, the Chang Kaiduan of relay is connected with the other end of the first resistance and the input of AC feedback circuit respectively.
3. new type of relay circuit according to claim 1, it is characterized in that, described AC feedback circuit comprises: the first two-way optocoupler, the second resistance and the first electric capacity, the described first two-way first end of optocoupler primary circuit is connected with the output of control relay circuit, the first end of the first two-way optocoupler secondary circuit, be connected with a 3.3V power supply by the second resistance, and by the first capacity earth, the first end of the first two-way optocoupler secondary circuit is also connected with the first input end of MCU, the second end ground connection of the first two-way optocoupler secondary circuit.
4. new type of relay circuit according to claim 1, it is characterized in that, described ac zero-crossing detection circuit comprises: the second two-way optocoupler, the 3rd resistance, the 4th resistance and the second electric capacity, the first end of described second two-way optocoupler primary circuit is connected with live wire by the 3rd resistance, the first end of the second two-way optocoupler secondary circuit is connected with a 3.3V power supply by the 4th resistance, and by the second capacity earth, the first end of the second two-way optocoupler secondary circuit is also connected with second input of MCU, the second end ground connection of the second two-way optocoupler secondary circuit.
CN201520256551.4U 2015-04-24 2015-04-24 A kind of new type of relay circuit Expired - Fee Related CN204497150U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520256551.4U CN204497150U (en) 2015-04-24 2015-04-24 A kind of new type of relay circuit

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Application Number Priority Date Filing Date Title
CN201520256551.4U CN204497150U (en) 2015-04-24 2015-04-24 A kind of new type of relay circuit

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CN204497150U true CN204497150U (en) 2015-07-22

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105652769A (en) * 2016-01-20 2016-06-08 苏州英纳索智能科技有限公司 Relay anti-adhesion circuit and control method thereof
CN106469629A (en) * 2015-08-19 2017-03-01 艾默生电气公司 Self study relay turns off control system and method
CN106653482A (en) * 2016-11-03 2017-05-10 江苏英索纳智能科技有限公司 Self-tuning relay anti-adhesion circuit and control method thereof
CN108790895A (en) * 2018-06-21 2018-11-13 深圳市核达中远通电源技术股份有限公司 A kind of structure and control method of alternating-current charging pile that opening control based on relay zero
CN110600326A (en) * 2019-05-22 2019-12-20 广州世荣电子股份有限公司 Self-locking feedback relay

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106469629A (en) * 2015-08-19 2017-03-01 艾默生电气公司 Self study relay turns off control system and method
CN106469629B (en) * 2015-08-19 2018-04-27 艾默生电气公司 Self study relay turns off control system and method
CN105652769A (en) * 2016-01-20 2016-06-08 苏州英纳索智能科技有限公司 Relay anti-adhesion circuit and control method thereof
CN106653482A (en) * 2016-11-03 2017-05-10 江苏英索纳智能科技有限公司 Self-tuning relay anti-adhesion circuit and control method thereof
CN106653482B (en) * 2016-11-03 2019-02-26 江苏英索纳智能科技有限公司 Self-correcting relay anti-adhesion circuit and its control method
CN108790895A (en) * 2018-06-21 2018-11-13 深圳市核达中远通电源技术股份有限公司 A kind of structure and control method of alternating-current charging pile that opening control based on relay zero
CN110600326A (en) * 2019-05-22 2019-12-20 广州世荣电子股份有限公司 Self-locking feedback relay

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150722

Termination date: 20200424

CF01 Termination of patent right due to non-payment of annual fee