CN109036960A - A kind of relay driving control circuit - Google Patents
A kind of relay driving control circuit Download PDFInfo
- Publication number
- CN109036960A CN109036960A CN201810896240.2A CN201810896240A CN109036960A CN 109036960 A CN109036960 A CN 109036960A CN 201810896240 A CN201810896240 A CN 201810896240A CN 109036960 A CN109036960 A CN 109036960A
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- China
- Prior art keywords
- relay
- node
- voltage
- control circuit
- driving control
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Classifications
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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
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- Relay Circuits (AREA)
Abstract
The present invention relates to a kind of relay driving control circuits, including the ground terminal switching tube for being connected between the second node of relay coil one end and ground and being connected when relay drive signal is high level, the high voltage power supply of required voltage when for providing adhesive action for relay, the low-tension supply of required voltage when keeping being attracted for providing for relay, driving delay circuit for being exported after being delayed to relay drive signal, the power end switching tube that relay drive signal after the delay is connected when being high level, current-limiting resistance, storage capacitor, block voltage-stabiliser tube, high voltage power supply, power end switching tube, current-limiting resistance is connected to first node after being connected in series, low-tension supply is connected to the first node of the relay coil other end, storage capacitor is connected between first node and ground, driving delay circuit is connected with power end switching tube It connects.Being quickly converted for high low driving voltage may be implemented in the present invention, realizes the purpose for reducing coil heating.
Description
Technical field
The invention belongs to relay driving control field, in particular to one kind can reduce coil heating, additionally it is possible to realize
The drive control circuit of relay quick on-off switching.
Background technique
Relay is made of coil and contact, and the course of work can be divided into two stages: one is contact attracting process,
The other is the holding process after the actuation of contact.Contact attracting process needs higher voltage to provide biggish energy, and touches
Point then needs lower voltage to keep attracting state after being attracted.If using single driving voltage, in order to guarantee after
The reliable actuation of electric appliance can only select high driving voltage, during working long hours after relay actuation in this way, relay
Coil can seriously generate heat energy consumption, and existing way has following two at present to solve this problem:
First method is shown in Fig. 1: being driven using twin voltage, high driving voltage 12V is connected to a larger energy storage by current-limiting resistance R2
On capacitor C1, low driving voltage 7V is connected on this storage capacitor C1 by diode D2.Quilt on capacitor C1 when relay does not work
It is charged as high driving voltage 12V, provides large energy so as to be attracted to the contact of relay；After relay is attracted, by
It will turn in the current-limiting resistance R2 effect of high driving voltage by low driving voltage 7V continued power.The benefit done so is exactly: after
Turn to be powered by low driving voltage when electric appliance continues working after being attracted, relay coil fever and energy conservation, while pressure stabilizing can be reduced
While the flyback voltage of the blocking effect of pipe ZD3 relay coil when ensure that Q2 is closed is not too high, relay is limited
The afterflow of device coil makes relay turn-off speed faster.
Second method such as Fig. 2: it is attracted using the of short duration afterflow of coil when cut-off and keeps principle, driven using PWM
Dynamic, high level last for several seconds guarantees that relay is reliably attracted when starting to be attracted, and relay turns to be driven by PWM wave after being attracted, PWM wave
Afterflow effect relay contact when paddy due to coil still maintains attracting state.The benefit done so is exactly to be attracted in relay
After turn when continuing working to be driven by PWM, relay coil fever can be reduced and energy conservation and do not need twin voltage.
Both the above method is respectively present following defect:
First method after actuation in order to turn by low-voltage driving, and current-limiting resistance R2 value is larger, while in order to guarantee relay
Reliable to be attracted, storage capacitor C1 value is also larger, causes high voltage longer to the storage capacitor charging time in this way.Due to high voltage
It is longer to the storage capacitor charging time, it needs to wait for a period of time after relay disconnection and be charged again to storage capacitor,
Only it just can be carried out adhesive action again after the voltage on storage capacitor is charged as high voltage.In some applications, after
Electric appliance needs to drive actuation again at once after disconnecting, and relay can not carry out quick on-off switching control at this time, lead to not make
With.
Second method does not use reversed afterflow due to using PWM to drive so to retain the afterflow function of coil
Voltage-stabiliser tube is blocked, this just makes relay turn-off delay, and it is unfavorable that relay, which cannot turn off rapidly, in some occasion such as failures.
Summary of the invention
The object of the present invention is to provide one kind not only can solve the quick-make and disconnection of relay the problem of, but also can solve after
The loss of electric apparatus coil and the relay driving control circuit of heating problem.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of relay driving control circuit, for coil both ends are respectively formed the relay of first node and second node into
Row drive control, the relay driving control circuit include being connected between the second node and ground and in relay driving
The ground terminal switching tube that signal is connected when being high level, the relay driving control circuit further include for being the relay
The high voltage power supply of required voltage when adhesive action is provided, when keeping actuation for providing for the relay required voltage low pressure
Power supply, driving delay circuit, the relay after the delay for being exported after being delayed to the relay drive signal
Device driving signal be high level when be connected power end switching tube, current-limiting resistance, storage capacitor, block voltage-stabiliser tube, the high pressure
Power supply, the power end switching tube, the current-limiting resistance are connected to the first node, the low-tension supply connection after being connected in series
To the first node, the storage capacitor is connected between the first node and ground, the driving delay circuit with it is described
Power end switching tube is connected, and the anode for blocking voltage-stabiliser tube is connected with the first node, the blocking voltage-stabiliser tube
Cathode is connected with the second node.
Preferably, the power end switching tube uses triode, the base stage of the triode and the driving delay circuit
It is connected, the emitter of the triode is connected with the high voltage power supply, the collector of the triode and current limliting electricity
Resistance is connected.
Preferably, the output end of the driving delay circuit is connected to the base stage of the triode, institute after first resistor
It states and is connected with second resistance between the base stage of triode and emitter.
Preferably, the relay drive circuit further includes power end diode, and the low-tension supply is through the power end
Diode and be connected to the first node.
Preferably, the relay driving control circuit further includes freewheeling diode, the anode warp for blocking voltage-stabiliser tube
The freewheeling diode and be connected to the first node.
Preferably, the ground terminal switching tube uses field-effect tube, and the grid of the field-effect tube accesses the relay
Driving signal, the drain electrode of the field-effect tube are connected with the second node, the source electrode ground connection of the field-effect tube.
Preferably, the relay drive signal accesses the grid of the field-effect tube, the field effect after 3rd resistor
The 4th resistance should be connected between the grid and source electrode of pipe.
Preferably, the high level and low level of the relay drive signal are respectively set in the driving delay circuit
Delay time, the adhesive action for being greater than the relay to the delay time of the high level of the relay drive signal are taken
Between.
Due to the above technical solutions, the present invention has the following advantages over the prior art: the present invention can to after
The action time of the high driving voltage of electric appliance control effectively, and realizes being quickly converted for high low driving voltage, guarantees relay
It can be to realize the purpose for reducing coil heating while quick on-off switching control, and reduce the capacity and body of storage capacitor
Product, has saved the space PCBA.
Detailed description of the invention
Attached drawing 1 is the schematic diagram of the first existing relay driving control circuit.
Attached drawing 2 is the schematic diagram of existing second of relay driving control circuit.
Attached drawing 3 is the schematic diagram of relay driving control circuit of the invention.
Specific embodiment
The invention will be further described for embodiment shown in reference to the accompanying drawing.
Embodiment one: relay includes coil and the contact that acts under coil effect, circuit where coil with after
Electrical equipment drive signal is connected, and the both ends of coil are respectively formed first node and second node.When relay action signal is height
When level, circuit is connected where coil, so that coil obtains electric, contact actuation；And when relay action signal is low level, line
Circuit disconnects where circle, coil losing electricity, and contact disconnects.
As shown in Fig. 3, a kind of for carrying out the relay driving control circuit of drive control to above-mentioned relay, mainly
Including high voltage power supply, low-tension supply, power end switching tube, current-limiting resistance R5, storage capacitor C1, blocking voltage-stabiliser tube ZD3 and connect
Ground terminal switching tube.
High voltage power supply is used to provide required voltage (i.e. high driving voltage) when adhesive action for relay, adopts in the present embodiment
With 12V power supply.Required voltage (and low driving voltage) when low-tension supply is used to provide holding actuation for relay, in the present embodiment
Using 7V power supply.High voltage power supply, power end switching tube, current-limiting resistance R5 are connected to first node, low-tension supply after being connected in series
It is connected to first node, power end diode D2 can also be set, so that low-tension supply is connected to through power end diode D2
First node.Storage capacitor C1 is connected between first node and ground.For being exported after being delayed to relay drive signal
Driving delay circuit be connected with power end switching tube, power end switching tube driving delay circuit output delay after after
Electrical equipment drive signal is connected when being high level.It blocks the anode of voltage-stabiliser tube ZD3 to be connected with first node, blocks voltage-stabiliser tube ZD3
Cathode be connected with second node；Sustained diode 1 can also be set, block the anode of voltage-stabiliser tube ZD3 through freewheeling diode
D1 and be connected to first node, sustained diode 1 anode with blocking voltage-stabiliser tube ZD3 anode be connected.In relay driving
The ground terminal switching tube that signal is connected when being high level is connected between second node and ground.
Power end switching tube uses triode Q1.The base stage of triode Q1 is connected with driving delay circuit, triode Q1
Emitter be connected with high voltage power supply, the collector of triode Q1 is connected with current-limiting resistance R5.Drive the defeated of delay circuit
Outlet is connected to the base stage of triode Q1 after first resistor R1, and the second electricity is connected between the base stage and emitter of triode Q1
Hinder R2.
Ground terminal switching tube uses field-effect tube Q2, the grid cut-in relay driving signal of field-effect tube Q2, field-effect
The drain electrode of pipe Q2 is connected with second node, the source electrode ground connection of field-effect tube Q2.Relay drive signal is after 3rd resistor R3
The grid for accessing field-effect tube Q2, is connected with the 4th resistance R4 between the grid and source electrode of field-effect tube Q2.
Delay time is respectively set to the high level and low level of relay drive signal in driving delay circuit, it is usually right
The time required to the delay time of the high level of relay drive signal is greater than the adhesive action of relay, and relay driving is believed
Number low level delay time be set as 0, i.e., be not delayed to low level.
The above relay driving control circuit seals in triode Q1 in high-voltage charge circuit, is believed using relay driving
Number turning on and off for triode Q1 is controlled, and is added and prolongs between relay drive signal and triode Q1 control electrode
When circuit, the delay time of relay drive signal low and high level can be controlled separately, and current-limiting resistance R5 and storage capacitor C1 take
Value is smaller, can carry out delays time to control to the high voltage drive duration in this way, guarantee rapid again after relay be reliably attracted
Triode Q1 is closed, turns to be kept by attracting state of the low-voltage to relay, while remaining and blocking voltage-stabiliser tube ZD3 to continuous
The block function of stream, enables relay to rapidly switch off.
The specific workflow of above-mentioned relay driving control circuit is as follows:
When initial power-on, relay drive signal is low level, and field-effect tube Q2 is closed, and relay is in close state, and is driven
Delay circuit does not play time-lag action (delay time is adjustable), the base stage of triode Q1 to low level relay drive signal in vain
For low level, triode Q1 is in the conductive state, and storage capacitor C1 both end voltage is begun to ramp up by 0V at this time, the high-voltage electricity of 12V
After the low-tension supply of source and 7V give storage capacitor C1 quick charge to 7V simultaneously, continued by the high voltage power supply of 12V to storage capacitor
C1 charges to 12.Current direction during this as in Fig. 3 I1 mark, be ready to relay driving.This charging time pole
It is short, less than the mechanical action time of relay, it is believed that this charging time is without waiting.
When relay driving letter is high level and drives relay, field-effect tube Q2 conducting, the actuating of relay.Due to driving
Dynamic delay circuit to the time-lag action of the high level of relay drive signal, the base stage scene effect pipe Q2 conducting of triode Q1,
It is low level during the entire process of relay mechanical action, the high voltage power supply of 12V is continuously relay power supply in whole process,
To guarantee relay action message, this electric current as in Fig. 3 I2 mark, the duration is driving delay circuit electricity high to driving signal
Flat delay time (delay time is adjustable, is generally adapted to the mechanical action time greater than relay).
When the actuating of relay finishes, driving delay circuit delay is reached, and the base stage of triode Q1 switchs to high level at this time, and three
Pole pipe Q1 is closed, and relay turns to be powered by storage capacitor C1, and until the voltage on storage capacitor C1 drops to 7V, current direction is such as
I4 marks (this time is shorter) in Fig. 3.
When storage capacitor C1 both end voltage drops to 7V, relay then turns to be powered by the low-tension supply of 7V, in holding
State, current direction as in Fig. 3 I3 mark.
When relay drive signal becomes low level from high level, when field-effect tube Q2 is closed, relay is disconnected, triode
Q1 is connected rapidly to charge to storage capacitor C1, and process is similar with aforementioned initial charge process, does not repeat, the difference is that: it is non-at this time
Initial power-on, the voltage on storage capacitor C1 begins to ramp up 12V by 7V, rather than rises to 12V by 0 V.
When field-effect tube Q2 is closed, relay coil incudes backward voltage, only blocks voltage-stabiliser tube ZD3's when voltage is greater than
Freewheeling state can just be entered when threshold values.Freewheel current as in Fig. 3 I5 mark, so block voltage-stabiliser tube ZD3 in cut-off
Blocking effect is played to coil afterflow, accelerates the closing velocity of relay.Without waiting storage capacitor when opening simultaneously
In the charging time of C1, so relay on-off switch speed is very fast in this programme, on-off switching time is substantially by relay
The mechanical action time of itself determines.
The present invention solves cannot be quick after relay existing for existing the first relay control driving method disconnects
The problem of relay existing for the problem of closure and second of relay control driving method cannot be disconnected quickly, protects simultaneously
Testimony piezoelectric voltage keeps higher voltage value in the initial time that relay is closed, and when being kept after relay is closed completely
Interior supply voltage is lower, to reduce the loss and fever of coil.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of relay driving control circuit, for coil both ends to be respectively formed with the relay of first node and second node
Drive control is carried out, the relay driving control circuit includes being connected between the second node and ground and driving in relay
The ground terminal switching tube that dynamic signal is connected when being high level, it is characterised in that: the relay driving control circuit further includes using
When providing adhesive action for the relay high voltage power supply of required voltage, for for the relay provide holding be attracted when
The low-tension supply of required voltage, is being prolonged the driving delay circuit for exporting after being delayed to the relay drive signal
When after the relay drive signal be connected when being high level power end switching tube, current-limiting resistance, storage capacitor, block it is steady
Pressure pipe, the high voltage power supply, the power end switching tube, the current-limiting resistance are connected to the first node, institute after being connected in series
It states low-tension supply and is connected to the first node, the storage capacitor is connected between the first node and ground, the driving
Delay circuit is connected with the power end switching tube, and the anode for blocking voltage-stabiliser tube is connected with the first node, institute
It states and the cathode of voltage-stabiliser tube is blocked to be connected with the second node.
2. a kind of relay driving control circuit according to claim 1, it is characterised in that: the power end switching tube is adopted
With triode, the base stage of the triode is connected with the driving delay circuit, the emitter of the triode and the height
Voltage source is connected, and the collector of the triode is connected with the current-limiting resistance.
3. a kind of relay driving control circuit according to claim 2, it is characterised in that: the driving delay circuit
Output end is connected to the base stage of the triode after first resistor, and is connected between the base stage and emitter of the triode
Two resistance.
4. a kind of relay driving control circuit according to claim 1, it is characterised in that: the relay drive circuit
It further include power end diode, the low-tension supply is connected to the first node through the power end diode.
5. a kind of relay driving control circuit according to claim 1, it is characterised in that: the relay driving control
Circuit further includes freewheeling diode, and the anode for blocking voltage-stabiliser tube is connected to the first segment through the freewheeling diode
Point.
6. a kind of relay driving control circuit according to claim 1, it is characterised in that: the ground terminal switching tube is adopted
With field-effect tube, the grid of the field-effect tube accesses the relay drive signal, the drain electrode of the field-effect tube with it is described
Second node is connected, the source electrode ground connection of the field-effect tube.
7. a kind of relay driving control circuit according to claim 6, it is characterised in that: the relay drive signal
The grid of the field-effect tube is accessed after 3rd resistor, and the 4th electricity is connected between the grid and source electrode of the field-effect tube
Resistance.
8. a kind of relay driving control circuit according to claim 1, it is characterised in that: in the driving delay circuit
Delay time is respectively set to the high level and low level of the relay drive signal, to the height of the relay drive signal
The time required to the delay time of level is greater than the adhesive action of the relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810896240.2A CN109036960A (en) | 2018-08-08 | 2018-08-08 | A kind of relay driving control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810896240.2A CN109036960A (en) | 2018-08-08 | 2018-08-08 | A kind of relay driving control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109036960A true CN109036960A (en) | 2018-12-18 |
Family
ID=64650036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810896240.2A Pending CN109036960A (en) | 2018-08-08 | 2018-08-08 | A kind of relay driving control circuit |
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| Country | Link |
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| CN (1) | CN109036960A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509680A (en) * | 2018-12-25 | 2019-03-22 | 深圳和而泰小家电智能科技有限公司 | Relay protection circuit |
| CN110005600A (en) * | 2019-03-25 | 2019-07-12 | 厦门标迪电器有限公司 | A kind of control circuit and control method of accurate control air pump pressure and flow |
| CN110570629A (en) * | 2019-10-22 | 2019-12-13 | 大连谷瑞特科技有限公司 | Emergency disposal interface device of earthquake early warning system |
| CN112509864A (en) * | 2020-11-06 | 2021-03-16 | 联创汽车电子有限公司 | Relay control method and control structure thereof |
| CN112838764A (en) * | 2021-02-26 | 2021-05-25 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
| CN112928738A (en) * | 2021-01-25 | 2021-06-08 | 合肥朗云物联科技股份有限公司 | Circuit of low-voltage direct-current relay for high-voltage direct current |
| CN113488353A (en) * | 2021-07-27 | 2021-10-08 | 苏州海鹏科技有限公司 | Photovoltaic inverter and relay control circuit thereof |
| CN114334543A (en) * | 2021-12-02 | 2022-04-12 | 广东友电新能源科技有限公司 | Relay acceleration driving circuit |
| CN117637392A (en) * | 2024-01-26 | 2024-03-01 | 深圳市德兰明海新能源股份有限公司 | Electromagnetic relay driving circuit and electronic apparatus |
| CN110005600B (en) * | 2019-03-25 | 2024-05-24 | 厦门标迪电器有限公司 | Control circuit and control method for precisely controlling pressure and flow of air pump |
-
2018
- 2018-08-08 CN CN201810896240.2A patent/CN109036960A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509680A (en) * | 2018-12-25 | 2019-03-22 | 深圳和而泰小家电智能科技有限公司 | Relay protection circuit |
| CN110005600A (en) * | 2019-03-25 | 2019-07-12 | 厦门标迪电器有限公司 | A kind of control circuit and control method of accurate control air pump pressure and flow |
| CN110005600B (en) * | 2019-03-25 | 2024-05-24 | 厦门标迪电器有限公司 | Control circuit and control method for precisely controlling pressure and flow of air pump |
| CN110570629A (en) * | 2019-10-22 | 2019-12-13 | 大连谷瑞特科技有限公司 | Emergency disposal interface device of earthquake early warning system |
| CN112509864A (en) * | 2020-11-06 | 2021-03-16 | 联创汽车电子有限公司 | Relay control method and control structure thereof |
| CN112509864B (en) * | 2020-11-06 | 2024-05-10 | 联创汽车电子有限公司 | Relay control method and control structure thereof |
| CN112928738B (en) * | 2021-01-25 | 2023-09-08 | 广州佛朗斯股份有限公司 | Circuit for high-voltage direct current of low-voltage direct current relay |
| CN112928738A (en) * | 2021-01-25 | 2021-06-08 | 合肥朗云物联科技股份有限公司 | Circuit of low-voltage direct-current relay for high-voltage direct current |
| CN112838764B (en) * | 2021-02-26 | 2022-06-14 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
| CN112838764A (en) * | 2021-02-26 | 2021-05-25 | 西安微电子技术研究所 | Power supply level conversion circuit and method |
| CN113488353A (en) * | 2021-07-27 | 2021-10-08 | 苏州海鹏科技有限公司 | Photovoltaic inverter and relay control circuit thereof |
| CN114334543A (en) * | 2021-12-02 | 2022-04-12 | 广东友电新能源科技有限公司 | Relay acceleration driving circuit |
| CN114334543B (en) * | 2021-12-02 | 2024-03-22 | 深圳科士达科技股份有限公司 | Relay acceleration driving circuit |
| CN117637392A (en) * | 2024-01-26 | 2024-03-01 | 深圳市德兰明海新能源股份有限公司 | Electromagnetic relay driving circuit and electronic apparatus |
| CN117637392B (en) * | 2024-01-26 | 2024-04-19 | 深圳市德兰明海新能源股份有限公司 | Electromagnetic relay driving circuit and electronic apparatus |
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