CN205789724U - A kind of relay zero point open control circuit - Google Patents
A kind of relay zero point open control circuit Download PDFInfo
- Publication number
- CN205789724U CN205789724U CN201620571906.3U CN201620571906U CN205789724U CN 205789724 U CN205789724 U CN 205789724U CN 201620571906 U CN201620571906 U CN 201620571906U CN 205789724 U CN205789724 U CN 205789724U
- Authority
- CN
- China
- Prior art keywords
- resistance
- power supply
- relay
- zero
- mcu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Relay Circuits (AREA)
Abstract
The utility model discloses a kind of relay zero point open control circuit, including MCU, non-isolated power supply, first zero cross detection circuit, alternating current power supply, relay, load outputs, second zero cross detection circuit and 12V power supply, the outfan of described non-isolated power supply and the live wire of alternating current power supply all inputs with the first zero cross detection circuit are connected, the outfan of described first zero cross detection circuit is connected with an AD sampling end of MCU, the live wire of described alternating current power supply is also connected with one end of relay switch contacts, the other end of described relay switch contacts and load outputs all inputs with the second zero cross detection circuit are connected, the outfan of described second zero cross detection circuit is connected with the 2nd AD sampling end of MCU, the zero line grounding of described alternating current power supply.This utility model has that simple in construction, low cost, volume be little, relay length in service life and advantage reliably, can be widely applied to electric equipment field.
Description
Technical field
This utility model relates to electric equipment field, especially a kind of relay zero point open control circuit.
Background technology
In the intelligent control technologies such as Smart Home, mobile household electrical appliance, one of control of most critical is exactly to dissimilarity
Matter load (such as capacitive, inductive load) and different capacity load (such as high-power, low-power load) cut-off control.Due to capacitive
The electric filament lamp even load of load or cold conditions moment resistance value on startup is the lowest, is therefore controlling the wink that load is connected
Between, power supply can produce the phenomenon of near short circuit, 10 times when the dash current of its moment is normally to work even 100 times, this
If big electric current can produce the biggest heat by the contact of relay and directly burn out contact, cause relay contact adhesion, contracting
The life-span of short relay.So generally using the mode of Super-zero control to reduce dash current to extend the life-span of relay.
But, current relay zero-crossing control circuit exists that structure is complicated, relatively costly, volume is relatively big, relay mostly
Device not length in service life and less reliable defect, it is difficult to meet the high request of intelligent control technology.
Utility model content
For solving above-mentioned technical problem, the purpose of this utility model is: provide a kind of simple in construction, low cost, volume
Little, relay length in service life and reliably relay zero point open control circuit.
Technical solution adopted in the utility model is:
A kind of relay zero point open control circuit, including MCU, non-isolated power supply, the first zero cross detection circuit, alternating current
Source, relay, load outputs, the second zero cross detection circuit and 12V power supply, the outfan of described non-isolated power supply and alternating current
The live wire in source all inputs with the first zero cross detection circuit are connected, and the outfan of described first zero cross detection circuit is with MCU's
Oneth AD sampling end connects, and the live wire of described alternating current power supply is also connected with one end of relay switch contacts, and described relay is opened
Close the other end of contact and the load outputs input all with the second zero cross detection circuit to be connected, described second zero passage detection
The outfan of circuit is connected with the 2nd AD sampling end of MCU, the zero line grounding of described alternating current power supply, and described 12V power supply is by continuing
Electrical equipment control end and then be connected with the I/O port of MCU.
Further, described first zero cross detection circuit includes the first diode, the first resistance, the second resistance, the 3rd resistance
All anodes with the first diode are connected with the 4th resistance, the outfan of described non-isolated power supply and the live wire of alternating current power supply,
The negative electrode of described first diode is connected by the first resistance and then the one end with the second resistance, the other end of described second resistance
It is connected with one end of the 3rd resistance and one end of the 4th resistance respectively, the other end ground connection of described 3rd resistance, the described 4th
The other end of resistance is connected with an AD sampling end of MCU.
Further, described second zero cross detection circuit includes the second diode, the 5th resistance, the 6th resistance, the 7th resistance
With the 8th resistance, described relay switch contacts and load outputs all anodes with the second diode are connected, and described second
The negative electrode of diode is connected by the 5th resistance and then the one end with the 6th resistance, and the other end of described 6th resistance is respectively with the
One end of one end of seven resistance and the 8th resistance connects, the other end ground connection of described 7th resistance, described 8th resistance another
One end is connected with the 2nd AD sampling end of MCU.
Further, also include NPN type triode and the 9th resistance, control end and the NPN type triode of described relay
Colelctor electrode connect, the base stage of described NPN type triode is connected with one end of the 9th resistance, the other end of described 9th resistance and
The I/O port of MCU connects, the grounded emitter of described NPN type triode.
Further, also include the first electric capacity and stabilivolt, one end of described first electric capacity and the negative electrode of stabilivolt all with
4th resistance connects, the other end of described first electric capacity and the equal ground connection of anode of stabilivolt.
Further, also include that the second electric capacity, one end of described second electric capacity are connected with the 8th resistance, described second electric capacity
Other end ground connection.
Further, described relay switch contacts is normally opened contact.
The beneficial effects of the utility model are: include MCU, non-isolated power supply, the first zero cross detection circuit, alternating current power supply,
Relay, load outputs, the second zero cross detection circuit, 12V power supply and audion, simple in construction, low cost and volume are little；Increase
If the first zero cross detection circuit and the second zero cross detection circuit, can not only by the first zero cross detection circuit coordinate MCU and
Non-isolated power supply completes the zero passage detection of alternating current power supply, and MCU can be coordinated to realize load electricity by the second zero cross detection circuit
The zero passage detection of pressure, the zero crossing for relay controls to provide relatively reliable support, substantially increases the use of relay
Life-span.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of this utility model a kind of relay zero point open control circuit；
Fig. 2 is the circuit theory diagrams of this utility model a kind of relay zero point open control circuit.
Reference: L, the live wire of alternating current power supply；N, the zero line of alternating current power supply；M1, non-isolated power supply；VCC, MCU or M1
External power supply；GND, earth terminal；D1, the first diode；R1, the first resistance；R2, the second resistance；R3, the 3rd resistance；R4,
Four resistance；Z1, stabilivolt；C1, the first electric capacity；RY1, relay；Load out, load outputs；D2, the second diode；R5、
5th resistance；R6, the 6th resistance；R7, the 7th resistance；R8, the 8th resistance；C2, the second electric capacity；+ 12V, 12V power supply；Q1、NPN
Type audion；R9, the 9th resistance；The I/O port of IO, MCU；The oneth AD sampling end of AD0, MCU；The 2nd AD sampling of AD1, MCU
End.
Detailed description of the invention
With reference to Fig. 1 and 2, a kind of relay zero point open control circuit, including MCU, non-isolated power supply M1, the first zero passage inspection
Slowdown monitoring circuit, alternating current power supply, relay R Y1, load outputs load out, the second zero cross detection circuit and 12V power supply, described non-
The outfan of insulating power supply M1 and the live wire L of alternating current power supply all inputs with the first zero cross detection circuit are connected, and described first
The outfan of zero cross detection circuit is connected with an AD sampling end AD0 of MCU, the live wire L of described alternating current power supply also with relay
One end of RY1 switch contact connects, the other end of described relay R Y1 switch contact and load outputs load out all with
The input of the second zero cross detection circuit connects, the outfan of described second zero cross detection circuit and the 2nd AD sampling end of MCU
AD1 connects, the zero line N ground connection of described alternating current power supply.
Seeing figures.1.and.2, be further used as preferred embodiment, described first zero cross detection circuit includes the one or two
Pole pipe D1, the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4, the outfan of described non-isolated power supply M1
And the live wire L of alternating current power supply all anodes with the first diode D1 are connected, the negative electrode of described first diode D1 passes through first
Resistance R1 and then the one end with the second resistance R2 are connected, the other end of described second resistance R2 respectively with one end of the 3rd resistance R3
And the 4th resistance R4 one end connect, the other end ground connection of described 3rd resistance R3, the other end of described 4th resistance R4 with
The oneth AD sampling end AD0 of MCU connects.
Seeing figures.1.and.2, be further used as preferred embodiment, described second zero cross detection circuit includes the two or two
Pole pipe D2, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the 8th resistance R8, described relay R Y1 switch contact and
Load outputs load out all anodes with the second diode D2 are connected, and the negative electrode of described second diode D2 is by the 5th electricity
Resistance R5 and then the one end with the 6th resistance R6 are connected, the other end of described 6th resistance R6 respectively with one end of the 7th resistance R7 with
And the 8th resistance R8 one end connect, the other end ground connection of described 7th resistance R7, the other end of described 8th resistance R8 and MCU
The 2nd AD sampling end AD1 connect.
See figures.1.and.2, be further used as preferred embodiment, also include NPN type triode Q1 and the 9th resistance
R9, described relay R Y1 control end be connected with the colelctor electrode of NPN type triode Q1, the base stage of described NPN type triode Q1 and
One end of 9th resistance R9 connects, and the other end of described 9th resistance R9 is connected with the I/O port of MCU, described NPN type triode Q1
Grounded emitter
See figures.1.and.2, be further used as preferred embodiment, also include the first electric capacity C1 and stabilivolt Z1, described
One end of first electric capacity C1 and the negative electrode of stabilivolt Z1 are all connected with the 4th resistance R4, the other end of described first electric capacity C1 with
And the equal ground connection of anode of stabilivolt Z1.
See figures.1.and.2, be further used as preferred embodiment, also include the second electric capacity C2, described second electric capacity C2
One end be connected with the 8th resistance R8, the other end ground connection of described second electric capacity C2.
Being further used as preferred embodiment, described relay switch contacts is normally opened contact.
Below in conjunction with Figure of description and specific embodiment, this utility model is described in further detail.
Embodiment one
See figures.1.and.2, first embodiment of the present utility model:
Defect complicated for prior art construction, relatively costly, that volume is relatively big, the life-span is not long and less reliable, this reality
Propose a kind of brand-new relay zero point open control circuit with novel, non-isolated power supply can be coordinated to be used together, significantly carry
The high life-span of relay.Control circuit of the present utility model mainly include MCU, non-isolated power supply, the first zero cross detection circuit,
Alternating current power supply, relay, load outputs, the second zero cross detection circuit, 12V power supply and NPN transistor.
Wherein, non-isolated power supply, provide reference voltage signal for the zero-crossing examination for AC supply voltage.
Alternating current power supply, for the input high-voltage AC signal less than 280V.
First zero-crossing detection circuit, for coordinating MCU that the zero crossing of alternating current power supply is detected, its mainly by D1,
R1, R2, R3, R4, Z1 and C1 form.D1, R1, R2 and R3 form rectification and voltage division circuit, are turned by the high pressure that alternating current power supply inputs
Change low pressure into；Z1, R4 and C1 act primarily as the effect of voltage stabilizing and filtering.
Second zero-crossing detection circuit, for coordinating MCU that the zero crossing of load voltage is detected, its mainly by D2,
R5, R6, R7, R8 and C2 form.D2, R5, R6, R7 form rectification and voltage division circuit, and by the high pressure of load output, (this voltage can will be handed over
Obtain after stream plant-grid connection load) be converted to the low pressure less than 4V；R8 and C2 acts primarily as the effect of filtering.
NPN type triode, is mainly used in driving relay.
Operation principle of the present utility model is as follows:
1, the high-voltage signal of alternating current power supply input form after rectification and voltage division circuit carries out dividing potential drop by D1, R1, R2 and R3, changes
Become low-voltage signal.This low-voltage signal is together with the reference voltage signal of non-isolated power supply, after R4 and C1 filtering and Z1 voltage stabilizing
Send into the AD0 mouth of MCU, finally from the high-speed AD sampling end AD0 of MCU sample and with MCU complete the zero passage spot check of alternating current power supply
Survey.
2, the high pressure of load output form after rectification and voltage division circuit carries out dividing potential drop by D2, R5, R6 and R7, is converted into low pressure and believes
Number, then send into the AD1 mouth of MCU through R9 and C2 filtering, finally from MCU high-speed AD sampling end AD1 sampling at a high speed and with MCU
Complete the zero-crossing examination of load voltage.
3, detected the zero crossing of alternating current power supply and the zero crossing of load voltage by step 1 and 2 after, MCU can basis
The two zero point triggers corresponding time control signal, coordinates NPN type triode to control the switch contact of relay at zero crossing
Guan Bi, to reduce dash current and to extend the life-span of relay.Actual application shows, uses control circuit of the present utility model
After structure, the service life of relay has obtained significant raising.
Although this utility model MCU relates to the process that the data such as zero-crossing examination and triggered time control signal process, but
It all can use existing technological means to realize, and is not described in detail at this.
It is above preferable enforcement of the present utility model is illustrated, but this utility model is not limited to described reality
Executing example, those of ordinary skill in the art also can make all equivalent changes on the premise of this utility model spirit
Shape or replacement, deformation or the replacement of these equivalents are all contained in the application claim limited range.
Claims (7)
1. a relay zero point open control circuit, it is characterised in that: include MCU, non-isolated power supply (M1), the first zero passage inspection
Slowdown monitoring circuit, alternating current power supply, relay (RY1), load outputs (load out), the second zero cross detection circuit and 12V power supply, institute
State the live wire (L) of the outfan of non-isolated power supply (M1) and the alternating current power supply input all with the first zero cross detection circuit to be connected,
The outfan of described first zero cross detection circuit is connected with an AD sampling end (AD0) of MCU, the live wire of described alternating current power supply
(L) also one end with relay (RY1) switch contact is connected, the other end of described relay (RY1) switch contact and load
Outfan (load out) all inputs with the second zero cross detection circuit are connected, the outfan of described second zero cross detection circuit
It is connected with the 2nd AD sampling end (AD1) of MCU, zero line (N) ground connection of described alternating current power supply.
A kind of relay zero point open control circuit the most according to claim 1, it is characterised in that: described first zero passage inspection
Slowdown monitoring circuit includes the first diode (D1), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3) and the 4th resistance
(R4), the live wire (L) of the outfan of described non-isolated power supply (M1) and alternating current power supply all with the anode of the first diode (D1)
Connecting, the negative electrode of described first diode (D1) is connected by the first resistance (R1) and then the one end with the second resistance (R2), institute
The other end stating the second resistance (R2) is connected with one end of the 3rd resistance (R3) and one end of the 4th resistance (R4) respectively, described
The other end ground connection of the 3rd resistance (R3), the other end of described 4th resistance (R4) connects with an AD sampling end (AD0) of MCU
Connect.
A kind of relay zero point open control circuit the most according to claim 1, it is characterised in that: described second zero passage inspection
Slowdown monitoring circuit includes the second diode (D2), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7) and the 8th resistance
(R8), described relay (RY1) switch contact and load outputs (load out) all with the anode of the second diode (D2)
Connecting, the negative electrode of described second diode (D2) is connected by the 5th resistance (R5) and then the one end with the 6th resistance (R6), institute
The other end stating the 6th resistance (R6) is connected with one end of the 7th resistance (R7) and one end of the 8th resistance (R8) respectively, described
The other end ground connection of the 7th resistance (R7), the other end of described 8th resistance (R8) connects with the 2nd AD sampling end (AD1) of MCU
Connect.
A kind of relay zero point open control circuit the most according to claim 1, it is characterised in that: also include NPN type three
Pole pipe (Q1) and the 9th resistance (R9), the control end of described relay (RY1) is connected with the colelctor electrode of NPN type triode (Q1),
The base stage of described NPN type triode (Q1) is connected with one end of the 9th resistance (R9), the other end of described 9th resistance (R9) with
The I/O port of MCU connects, the grounded emitter of described NPN type triode (Q1).
A kind of relay zero point open control circuit the most according to claim 2, it is characterised in that: also include the first electric capacity
(C1) all connect with the 4th resistance (R4) with stabilivolt (Z1), one end of described first electric capacity (C1) and the negative electrode of stabilivolt (Z1)
Connect, the other end of described first electric capacity (C1) and the equal ground connection of anode of stabilivolt (Z1).
A kind of relay zero point open control circuit the most according to claim 3, it is characterised in that: also include the second electric capacity
(C2), one end of described second electric capacity (C2) is connected with the 8th resistance (R8), the other end ground connection of described second electric capacity (C2).
7. according to a kind of relay zero point open control circuit described in any one of claim 1-6, it is characterised in that continue described in:
Electrical equipment (RY1) switch contact is normally opened contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620571906.3U CN205789724U (en) | 2016-06-14 | 2016-06-14 | A kind of relay zero point open control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620571906.3U CN205789724U (en) | 2016-06-14 | 2016-06-14 | A kind of relay zero point open control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205789724U true CN205789724U (en) | 2016-12-07 |
Family
ID=58131546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620571906.3U Active CN205789724U (en) | 2016-06-14 | 2016-06-14 | A kind of relay zero point open control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205789724U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653483A (en) * | 2016-12-22 | 2017-05-10 | 惠州Tcl照明电器有限公司 | Alternating current relay zero-cross motion control circuit |
| CN107844071A (en) * | 2017-08-30 | 2018-03-27 | 松下家电研究开发（杭州）有限公司 | Control method, zero standby power switch and household electrical appliance |
| CN110459433A (en) * | 2019-08-27 | 2019-11-15 | 九阳股份有限公司 | A kind of relay zero-crossing control method and cooking apparatus |
-
2016
- 2016-06-14 CN CN201620571906.3U patent/CN205789724U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106653483A (en) * | 2016-12-22 | 2017-05-10 | 惠州Tcl照明电器有限公司 | Alternating current relay zero-cross motion control circuit |
| CN106653483B (en) * | 2016-12-22 | 2020-07-10 | Tcl华瑞照明科技（惠州）有限公司 | Zero-crossing action control circuit of alternating-current relay |
| CN107844071A (en) * | 2017-08-30 | 2018-03-27 | 松下家电研究开发（杭州）有限公司 | Control method, zero standby power switch and household electrical appliance |
| CN110459433A (en) * | 2019-08-27 | 2019-11-15 | 九阳股份有限公司 | A kind of relay zero-crossing control method and cooking apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205789724U (en) | A kind of relay zero point open control circuit | |
| CN104682541A (en) | Emergency lamp control circuit and emergency lamp control device | |
| CN102508155B (en) | Test circuit for internally installed load switch of intelligent electric energy meter | |
| CN207118028U (en) | Single ignition source switches on-off circuit | |
| CN106208639A (en) | Input adaptive Switching power | |
| CN103364675A (en) | Wire disconnection detecting circuit and wire disconnection detecting device | |
| CN202550481U (en) | Abnormal voltage protection and display circuit and constant speed air conditioner | |
| CN102611338A (en) | Wide voltage impedance step-down circuit | |
| CN204859142U (en) | Touch zero -power electric iron time delay power down switch | |
| CN201577033U (en) | Automatic voltage switching circuit | |
| CN105356871B (en) | Zero-power-consumption standby touches power down switch | |
| CN208590141U (en) | A kind of single-fire-wire electronic switch | |
| CN103683968B (en) | The power controller of single live wire access | |
| CN203301380U (en) | An AC null line and live wire intelligent identifying and converting circuit | |
| CN205160495U (en) | Zero power consumption standby touches power down switch | |
| CN205160872U (en) | Wall switch of little night -light of LED of time delay pass is opened in area touch | |
| CN105357824B (en) | With the switch on wall for touching the LED night lamp for opening delay pass | |
| CN204290451U (en) | Charger | |
| CN103906327A (en) | Multi-point control LED illuminating lamp | |
| CN203851117U (en) | Single-button multi-point group control device | |
| CN203798896U (en) | Zero crossing detection circuit | |
| CN203397225U (en) | Industrial automatic water level controller based on time-base integrated chip | |
| CN207321222U (en) | Electronic delay controlling switch | |
| CN208016091U (en) | A kind of energy-efficient electronic mousetrap | |
| CN206209448U (en) | A kind of self-checking function voltage indicator delay controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |