CN209017007U - Alternating current zero crossing triggering type relay - Google Patents
Alternating current zero crossing triggering type relay Download PDFInfo
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- CN209017007U CN209017007U CN201822093081.0U CN201822093081U CN209017007U CN 209017007 U CN209017007 U CN 209017007U CN 201822093081 U CN201822093081 U CN 201822093081U CN 209017007 U CN209017007 U CN 209017007U
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- resistance
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- comparison amplifier
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Abstract
The utility model discloses a kind of alternating current zero crossing triggering type relay, including surge restraint circuit, zero-cross triggering circuit and switching circuit, wherein, surge restraint circuit mainly includes resistance R1 and capacitor C1, zero-cross triggering circuit mainly includes diode D1, diode D2 and comparison amplifier U1, and switching circuit mainly includes photo-coupler U2 and bidirectional thyristor Q1.The alternating current zero crossing triggering type relay of the utility model has the advantage that, 1, be provided with surge restraint circuit, very big induction moment surge voltage is generated when can prevent power supply from closing, and protects entire relay；2, zero-cross triggering circuit includes diode D1, diode D2 and comparison amplifier U1, and the square wave of standard is generated using the comparing function of comparison amplifier, and zero-acrross ing moment is very accurate, and ratio of precision tradition divider resistance mode is high；3, switching circuit uses Phototube Coupling, while realizing strong with weak control, can also prevent load flyback.
Description
Technical field
The embodiments of the present invention are related to relay field, in particular to a kind of alternating current zero crossing triggering type relay
Device.
Background technique
Relay is a kind of electric control device, is when the variation of input quantity (energizing quantity) reaches prescribed requirement, electrical
Make controlled volume that a kind of electric appliance of scheduled Spline smoothing occur in output circuit.It has control system (also known as input circuit) and
By the interactive relationship between control system (also known as output loop).It is usually applied in automation control circuit, it is actually
It is one kind " automatic switch " of control high current running to be gone with low current, therefore play automatic adjustment in circuit, safeguard protection, turn
The effects of changing circuit.
Solid-state relay is one of element of relay, be a kind of two terminals is input terminal, and another two connects
Line end is the four-terminal device of output end, and centre realizes the electric isolution of input and output using isolating device.Solid-state relay is by load
Power supply type can be divided into AC type and once-through type, wherein ac solid relay is a kind of contactless on-off electronic switch, its benefit
With the switching characteristic of electronic component (such as switching transistor, bidirectional triode thyristor semiconductor devices), contactless no-spark can reach
The purpose of ground make-and-break contact.
Zero passage detection refers in AC system, when waveform is converted from positive half cycle to negative half period, when by zero-bit, is
The detection that system is made.In order to realize pressure regulation, light modulation, temperature adjustment or the purpose of speed regulation in various control circuits, a benchmark is needed
Point be used as starting point, this starting point be exactly AC supply voltage be 0 when moment, zero passage detection seek to alternating voltage be 0 when
A signal, referred to as zero cross signal are issued to control circuit.Due to the non-contact work characteristic of ac solid relay, make its
The automatically controlled and computer control aspect in many fields obtains increasingly a wide range of application, therefore designs a sensitive exchange of zero passage
Solid-state relay has and must have very much.
Utility model content
The purpose of this utility model is to provide a kind of structure is simple, and the accurate alternating current zero crossing triggering type of zero-acrross ing moment
Relay.
To realize above-mentioned purpose of utility model, the utility model adopts the technical scheme that a kind of alternating current zero crossing triggering
Type relay, including surge restraint circuit, zero-cross triggering circuit and switching circuit, wherein surge restraint circuit includes mutually going here and there
The resistance R1 and capacitor C1 of connection, the surge restraint circuit are connected in parallel on power grid end；Zero-cross triggering circuit includes diode D1, diode
D2 and comparison amplifier U1, diode D1 and diode D2 reverse parallel connection form clamp circuit, which is connected in parallel on power grid
Between end and two input terminals of comparison amplifier U1；Switching circuit includes photo-coupler U2 and bidirectional thyristor Q1, optical coupling
The photophore of device U2 connects the output end of comparison amplifier U1, and light-receiving device meets the control electrode of bidirectional thyristor Q1, bidirectional thyristor Q2
For controlling load power source on-off.
In addition, the utility model also provides following attached technical scheme:
Zero-cross triggering circuit further includes resistance R2 and resistance R3, and resistance R2 is connected on zero line, and resistance R3 is connected on zero curve
End.
Zero-cross triggering circuit further includes resistance R4 and resistance R5, and resistance R4 is connected on the noninverting input of comparison amplifier U1
Between ground, resistance R5 is connected between the reverse input end and ground of comparison amplifier U1.
Switching circuit further includes resistance R6, and resistance R6 is connected on the output end of comparison amplifier U1 and the hair of photo-coupler U2
Between light device.
Compared with the prior art, the advantage of the utility model is: 1, being provided with surge restraint circuit, can prevent power supply from closing
Very big induction moment surge voltage is generated when closing, and protects entire relay；2, zero-cross triggering circuit includes diode D1, two poles
Pipe D2 and comparison amplifier U1, the square wave of standard is generated using the comparing function of comparison amplifier, and zero-acrross ing moment is very accurate,
Ratio of precision tradition divider resistance mode is high；3, switching circuit uses Phototube Coupling, while realizing strong with weak control, can also prevent
Only load flyback.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the utility model embodiment, embodiment or the relevant technologies will be retouched below
Attached drawing needed in stating is briefly described, it should be apparent that, it is practical new that the accompanying drawings in the following description merely relates to this
Some embodiments of type, are not limitation of the utility model.
Fig. 1 is the circuit diagram of the alternating current zero crossing triggering type relay of the utility model preferred embodiment.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
Body embodiment makees further unrestricted detailed description to technical solutions of the utility model.
See Fig. 1, the alternating current zero crossing triggering type relay of the present embodiment includes: surge restraint circuit, zero-cross triggering circuit and
Switching circuit.
Surge restraint circuit is connected in parallel on power grid end (AC 220V), which includes the resistance R1 being serially connected
Pressure-resistant parameter with capacitor C1, capacitor C1 must be sufficiently high.The present embodiment uses 100 Ω resistance and 0.1 μ F, 1KV capacitor.Except upper
It states outside RC series circuit, other special surge suppression devices can also be used.
Zero-cross triggering circuit includes that resistance R2, resistance R3, resistance R4, resistance R5, diode D1, diode D2 and comparing are put
Big device U1.Resistance R2 is connected on zero line, for dividing；Resistance R3 is connected on zero line side, for dividing.Diode D1 and two poles
Pipe D2 reverse parallel connection forms clamp circuit, which is connected in parallel on two of power grid end (AC 220V) and comparison amplifier U1
Between input terminal, which can be also used for clipping, the most 0.7V of both end voltage.Comparison amplifier U1 selects amplifier
LM358, non-inverting input terminal are started to exchange fire line end, and reverse input end connects zero line side.Resistance R4 is connected on the in the same direction of comparison amplifier U1
Between input terminal and ground, resistance R5 is connected between the reverse input end and ground of comparison amplifier U1, and resistance R4 and resistance R5 are used
In providing comparison amplifier U1 unified reference data.
Diode D1 and diode D2 not only realizes the input clamper of comparison amplifier U1, has also ensured and has compared amplification
The input of device U1 meets input parameter area, and zero-cross triggering circuit input terminal is directly started to exchange fire line and zero curve, be equivalent to regardless of
Pressure, before zero passage voltage drops to 0.7V, comparison amplifier U1 will not be acted, after zero passage voltage drops to 0.7V, this when
Time approaches zero crossing very much, and two diodes do not work, and comparison amplifier U1 is equivalent to and directly connects alternating current, then again
Real zero crossing is detected in the ratio of 1:1, obtained zero-acrross ing moment is very accurately ratio of precision tradition divider resistance mode
High 2 orders of magnitude.
Switching circuit includes resistance R6, resistance R7, photo-coupler U2 and bidirectional thyristor Q1.Resistance R6 is connected on to compare and put
Between the output end of big device U1 and the photophore of photo-coupler U2, resistance R7 connects the light-receiving device in power vd D and photo-coupler U2
Between collector, the light-receiving device emitter of photo-coupler U2 connects the control electrode of bidirectional thyristor Q1.When zero-cross triggering circuit detects
Alternating current zero passage, comparison amplifier U1 output end export high level, and the photophore of photo-coupler U2 shines, and light-receiving device conducting is double
There is electric current to flow through to the control electrode of thyristor Q1, the pole bidirectional thyristor Q1MT1 and the pole MT2 conducting load R8 power supply.
It should be pointed out that above-mentioned preferred embodiment is only to illustrate the technical ideas and features of the present invention, purpose
It is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly, this reality can not be limited with this
With novel protection scope.All equivalent change or modifications according to made by the spirit of the present invention essence, should all cover in this reality
Within novel protection scope.
Claims (4)
1. a kind of alternating current zero crossing triggering type relay, it is characterised in that: including surge restraint circuit, zero-cross triggering circuit and switch
Circuit, wherein
The surge restraint circuit includes the resistance R1 and capacitor C1 being serially connected, which is connected in parallel on power grid end；
The zero-cross triggering circuit includes diode D1, diode D2 and comparison amplifier U1, and diode D1 and diode D2 are anti-
To clamp circuit is composed in parallel, which is connected in parallel between power grid end and two input terminals of comparison amplifier U1；
The switching circuit includes photo-coupler U2 and bidirectional thyristor Q1, and the photophore of photo-coupler U2 meets comparison amplifier U1
Output end, light-receiving device connects the control electrode of bidirectional thyristor Q1, and bidirectional thyristor Q2 is for controlling load power source on-off.
2. alternating current zero crossing triggering type relay according to claim 1, it is characterised in that: the zero-cross triggering circuit also wraps
Resistance R2 and resistance R3 are included, resistance R2 is connected on zero line, and resistance R3 is connected on zero line side.
3. alternating current zero crossing triggering type relay according to claim 1, it is characterised in that: the zero-cross triggering circuit also wraps
Resistance R4 and resistance R5 are included, resistance R4 is connected between the noninverting input and ground of comparison amplifier U1, and resistance R5 is connected on ratio
Between reverse input end and ground compared with amplifier U1.
4. alternating current zero crossing triggering type relay according to claim 1, it is characterised in that: the switching circuit further includes electricity
R6 is hindered, resistance R6 is connected between the output end of comparison amplifier U1 and the photophore of photo-coupler U2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822093081.0U CN209017007U (en) | 2018-12-13 | 2018-12-13 | Alternating current zero crossing triggering type relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822093081.0U CN209017007U (en) | 2018-12-13 | 2018-12-13 | Alternating current zero crossing triggering type relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209017007U true CN209017007U (en) | 2019-06-21 |
Family
ID=66843855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822093081.0U Expired - Fee Related CN209017007U (en) | 2018-12-13 | 2018-12-13 | Alternating current zero crossing triggering type relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209017007U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797232A (en) * | 2019-09-26 | 2020-02-14 | 深圳市和玛科技有限公司 | Control method and circuit for preventing relay from being bonded |
| CN111614259A (en) * | 2020-06-12 | 2020-09-01 | 广东瑞德智能科技股份有限公司 | Circuit and electric appliance for isolating and controlling high-power load by using silicon controlled rectifier in flyback power supply |
-
2018
- 2018-12-13 CN CN201822093081.0U patent/CN209017007U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797232A (en) * | 2019-09-26 | 2020-02-14 | 深圳市和玛科技有限公司 | Control method and circuit for preventing relay from being bonded |
| CN111614259A (en) * | 2020-06-12 | 2020-09-01 | 广东瑞德智能科技股份有限公司 | Circuit and electric appliance for isolating and controlling high-power load by using silicon controlled rectifier in flyback power supply |
| CN111614259B (en) * | 2020-06-12 | 2021-09-21 | 广东瑞德智能科技股份有限公司 | Circuit and electric appliance for isolating and controlling high-power load by using silicon controlled rectifier in flyback power supply |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190621 Termination date: 20191213 |