CN109378252A - DC relay drive control circuit - Google Patents
DC relay drive control circuit Download PDFInfo
- Publication number
- CN109378252A CN109378252A CN201811289127.4A CN201811289127A CN109378252A CN 109378252 A CN109378252 A CN 109378252A CN 201811289127 A CN201811289127 A CN 201811289127A CN 109378252 A CN109378252 A CN 109378252A
- Authority
- CN
- China
- Prior art keywords
- control circuit
- resistance
- circuit
- connect
- triode
- 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.)
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Classifications
-
- 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
-
- 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
- H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
- H01H47/32—Energising current supplied by semiconductor device
Abstract
A kind of DC relay drive control circuit provided by the invention, the control module including driving output circuit and for controlling driving output circuit work；The input terminal of the driving output circuit is connect with power supply VCC, and the output end of the driving output circuit and the coil of relay connect；The control module includes first control circuit and second control circuit；The power input of the first control circuit is connect with power supply VCC, and output end exports stable DC to the control terminal of driving output circuit, and control terminal is connect with controller；The control terminal of the second control circuit is connect with controller, direct current for exporting first control circuit is electrically isolated the coil of output to relay, pass through above structure, stable work electricity consumption can be provided to DC relay, and the self stability of circuit structure is good, to guarantee that relay being capable of steady operation.
Description
Technical field
The present invention relates to a kind of circuit more particularly to a kind of DC relay drive control circuits.
Background technique
DC relay is widely used in modern industry control, in order to enable relay steady operation, needs to straight
A driving circuit is arranged in current relay, and existing relay drive circuit has following defects that existing DC relay drives
Dynamic circuit stability is poor, this is because existing DC relay generally passes through the confession that an electronic switching tube is linked into relay
In electrical circuit, so that the poor work stability of relay.
Therefore, in order to solve the above-mentioned technical problem, need to propose a kind of new solution.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of DC relay drive control circuit, it can be to direct current relay
Device provides stable work electricity consumption, and the self stability of circuit structure is good, to guarantee that relay being capable of steady operation.
A kind of DC relay drive control circuit provided by the invention, including drive output circuit and driven for controlling
The control module of dynamic output circuit work；
The input terminal of the driving output circuit is connect with power supply VCC, the output end and relay of the driving output circuit
The coil of device connects；
The control module includes first control circuit and second control circuit；
The power input of the first control circuit is connect with power supply VCC, control of the output end to driving output circuit
End processed exports stable DC, and control terminal is connect with controller；
The control terminal of the second control circuit is connect with controller, the direct current for exporting first control circuit every
Coil from output to relay can provide stable work electricity consumption, and circuit by above structure to DC relay
The self stability of structure is good, to guarantee that relay being capable of steady operation.
Further, the driving output circuit includes metal-oxide-semiconductor Q3, resistance R8 and voltage-stabiliser tube DW1；
The drain electrode of the metal-oxide-semiconductor Q3 is connect with power supply VCC, the coil JL connection of the source electrode and relay of the metal-oxide-semiconductor Q3,
The grid of the metal-oxide-semiconductor is connect by resistance R8 with source electrode, and the grid of the metal-oxide-semiconductor is connect with the cathode of voltage-stabiliser tube DW1, pressure stabilizing
The anode of pipe DW1 is connected to the source electrode of metal-oxide-semiconductor Q3, and control terminal of the grid of the metal-oxide-semiconductor Q3 as driving output circuit passes through
Above structure, enable to relay obtain it is stable be used as electricity consumption, so that it is guaranteed that the stability of relay work.
Further, the first control circuit includes resistance R1, resistance R2, resistance R4, resistance R5, triode Q2, three poles
Pipe Q1, diode D2 and capacitor C1；
The emitter of the triode Q1 is connected to power supply VCC, triode as the power input of first control circuit
The collector of Q1 is connect with the anode of diode D2, output end of the cathode of diode D2 as first control circuit, resistance R1
Both ends be connected to the emitter and base stage of triode Q1, the base stage of triode Q1 passes through the collection of resistance R2 and triode Q2
Electrode connection, the emitter ground connection of triode Q2, the base stage of triode Q2 are grounded by resistance R5, the base stage and electricity of triode Q2
One end connection of R4 is hindered, the other end of resistance R14 is connect as the control terminal of first control circuit with controller, diode D1's
Cathode is connected to the collector of triode Q2 by capacitor C1, by foregoing circuit structure, there is triode Q1, resistance R1, resistance
R2 forms a stable volt circuit, so that the voltage stabilization of metal-oxide-semiconductor Q3 grid is input to, moreover, the conducting of triode Q1
Dependent on the conducting and cut-off of triode Q2, to be conducive to control triode Q1, moreover, because the buffering of capacitor C1 is made
With so that the voltage for being input to the grid of metal-oxide-semiconductor Q3 slowly rises, to form good protection to metal-oxide-semiconductor Q3.
Further, the second control circuit includes resistance R5, resistance R7 and optocoupler G1；
One end of the resistance R6 is connected to controller as the control terminal of second control circuit, and the other end of resistance R6 is logical
Resistance R7 ground connection is crossed, the points of common connection between resistance R6 and resistance R7 is connect with the anode of the light emitting diode of optocoupler G1, light
The cathode of the light emitting diode of coupling G1 is grounded, and the collector of the phototriode of optocoupler G1 is connected to the output of first control circuit
End, the emitter of the phototriode of optocoupler G1 are connected to the control terminal of driving output circuit, by above structure, drive to be entire
Dynamic control circuit provides the second control terminal, so that metal-oxide-semiconductor Q3 in the case that only triode Q2 and optocoupler G1 are simultaneously turned on
Base stage can obtain it is electric, make metal-oxide-semiconductor Q3 be connected, thus be conducive to entire circuit structure stabilization.
It further, further include protection circuit, the input terminal of the protection circuit is connected to the source electrode of metal-oxide-semiconductor Q3, protection electricity
The output end on road is connected to the collector of triode Q2.
Specifically: the protection circuit includes diode D3 and resistance R3；
The anode of the diode D3 is connected to the source electrode of metal-oxide-semiconductor Q3, and the cathode of diode D1 is connected to by resistance R3
The collector of triode Q2, by above structure, can metal-oxide-semiconductor Q3 form good protection, this is because after relay work,
When relay powers off, at this point, relay coil meeting self-induction goes out a high voltage, which, which can form metal-oxide-semiconductor Q3, impacts,
And then damage metal-oxide-semiconductor Q3, and by above structure, then provide a flow circuits for the surge voltage, so to metal-oxide-semiconductor Q3 into
Row protection.
Further, further include input circuit, the input terminal of the input circuit is connect with power supply VCC, input circuit it is defeated
Outlet is connect with the power input of the power input of first control circuit and drive control circuit respectively.
Specifically, the input circuit is diode D1, by this structure, can form recoil to power supply VCC and hit guarantor
Shield.
Beneficial effects of the present invention: by means of the invention it is possible to provide stable work electricity consumption, Er Qie electricity to DC relay
The self stability of line structure is good, to guarantee that relay being capable of steady operation.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and examples:
Fig. 1 is circuit diagram of the invention.
Specific embodiment
Further description is made to the present invention below according to Figure of description, as shown in the figure:
A kind of DC relay drive control circuit provided by the invention, including drive output circuit and driven for controlling
The control module of dynamic output circuit work；
The input terminal of the driving output circuit is connect with power supply VCC, the output end and relay of the driving output circuit
The coil of device connects；
The control module includes first control circuit and second control circuit；
The power input of the first control circuit is connect with power supply VCC, control of the output end to driving output circuit
End processed exports stable DC, and control terminal is connect with controller；
The control terminal of the second control circuit is connect with controller, the direct current for exporting first control circuit every
Coil from output to relay can provide stable work electricity consumption, and circuit by above structure to DC relay
The self stability of structure is good, to guarantee that relay being capable of steady operation.Wherein, in Fig. 1 JL indicate relay coil, D4
For the freewheeling diode of relay coil.
In the present embodiment, the driving output circuit includes metal-oxide-semiconductor Q3, resistance R8 and voltage-stabiliser tube DW1；
The drain electrode of the metal-oxide-semiconductor Q3 is connect with power supply VCC, the coil JL connection of the source electrode and relay of the metal-oxide-semiconductor Q3,
The grid of the metal-oxide-semiconductor is connect by resistance R8 with source electrode, and the grid of the metal-oxide-semiconductor is connect with the cathode of voltage-stabiliser tube DW1, pressure stabilizing
The anode of pipe DW1 is connected to the source electrode of metal-oxide-semiconductor Q3, and control terminal of the grid of the metal-oxide-semiconductor Q3 as driving output circuit passes through
Above structure, enable to relay obtain it is stable be used as electricity consumption, so that it is guaranteed that the stability of relay work.
In the present embodiment, the first control circuit include resistance R1, resistance R2, resistance R4, resistance R5, triode Q2,
Triode Q1, diode D2 and capacitor C1；
The emitter of the triode Q1 is connected to power supply VCC, triode as the power input of first control circuit
The collector of Q1 is connect with the anode of diode D2, output end of the cathode of diode D2 as first control circuit, resistance R1
Both ends be connected to the emitter and base stage of triode Q1, the base stage of triode Q1 passes through the collection of resistance R2 and triode Q2
Electrode connection, the emitter ground connection of triode Q2, the base stage of triode Q2 are grounded by resistance R5, the base stage and electricity of triode Q2
One end connection of R4 is hindered, the other end of resistance R14 is connect as the control terminal of first control circuit with controller, diode D1's
Cathode is connected to the collector of triode Q2 by capacitor C1, by foregoing circuit structure, there is triode Q1, resistance R1, resistance
R2 forms a stable volt circuit, so that the voltage stabilization of metal-oxide-semiconductor Q3 grid is input to, moreover, the conducting of triode Q1
Dependent on the conducting and cut-off of triode Q2, to be conducive to control triode Q1, moreover, because the buffering of capacitor C1 is made
With so that the voltage for being input to the grid of metal-oxide-semiconductor Q3 slowly rises, to form good protection to metal-oxide-semiconductor Q3.
In the present embodiment, the second control circuit includes resistance R5, resistance R7 and optocoupler G1；
One end of the resistance R6 is connected to controller as the control terminal of second control circuit, and the other end of resistance R6 is logical
Resistance R7 ground connection is crossed, the points of common connection between resistance R6 and resistance R7 is connect with the anode of the light emitting diode of optocoupler G1, light
The cathode of the light emitting diode of coupling G1 is grounded, and the collector of the phototriode of optocoupler G1 is connected to the output of first control circuit
End, the emitter of the phototriode of optocoupler G1 are connected to the control terminal of driving output circuit, by above structure, drive to be entire
Dynamic control circuit provides the second control terminal, so that metal-oxide-semiconductor Q3 in the case that only triode Q2 and optocoupler G1 are simultaneously turned on
Base stage can obtain it is electric, make metal-oxide-semiconductor Q3 be connected, thus be conducive to entire circuit structure stabilization.
It further include protection circuit in the present embodiment, the input terminal of the protection circuit is connected to the source electrode of metal-oxide-semiconductor Q3, protects
The output end of protection circuit is connected to the collector of triode Q2.
Specifically: the protection circuit includes diode D3 and resistance R3；
The anode of the diode D3 is connected to the source electrode of metal-oxide-semiconductor Q3, and the cathode of diode D1 is connected to by resistance R3
The collector of triode Q2, by above structure, can metal-oxide-semiconductor Q3 form good protection, this is because after relay work,
When relay powers off, at this point, relay coil meeting self-induction goes out a high voltage, which, which can form metal-oxide-semiconductor Q3, impacts,
And then damage metal-oxide-semiconductor Q3, and by above structure, then provide a flow circuits for the surge voltage, so to metal-oxide-semiconductor Q3 into
Row protection.
It further include input circuit in the present embodiment, the input terminal of the input circuit is connect with power supply VCC, input circuit
Output end connect respectively with the power input of the power input of first control circuit and drive control circuit.
Specifically, the input circuit is diode D1, by this structure, can form recoil to power supply VCC and hit guarantor
Shield.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (8)
1. a kind of DC relay drive control circuit, it is characterised in that: including driving output circuit and for controlling driving
The control module of output circuit work；
The input terminal of the driving output circuit is connect with power supply VCC, the output end and relay for driving output circuit
Coil connection；
The control module includes first control circuit and second control circuit；
The power input of the first control circuit is connect with power supply VCC, control terminal of the output end to driving output circuit
Stable DC is exported, control terminal is connect with controller；
The control terminal of the second control circuit is connect with controller, and the direct current for exporting first control circuit is electrically isolated defeated
Out to the coil of relay.
2. DC relay drive control circuit according to claim 1, it is characterised in that: the driving output circuit includes
Metal-oxide-semiconductor Q3, resistance R8 and voltage-stabiliser tube DW1；
The drain electrode of the metal-oxide-semiconductor Q3 is connect with power supply VCC, the coil JL connection of the source electrode and relay of the metal-oxide-semiconductor Q3, described
The grid of metal-oxide-semiconductor is connect by resistance R8 with source electrode, and the grid of the metal-oxide-semiconductor is connect with the cathode of voltage-stabiliser tube DW1, voltage-stabiliser tube
The anode of DW1 is connected to the source electrode of metal-oxide-semiconductor Q3, control terminal of the grid of the metal-oxide-semiconductor Q3 as driving output circuit.
3. DC relay drive control circuit according to claim 2, it is characterised in that: the first control circuit includes
Resistance R1, resistance R2, resistance R4, resistance R5, triode Q2, triode Q1, diode D2 and capacitor C1；
The emitter of the triode Q1 is connected to power supply VCC as the power input of first control circuit, triode Q1's
Collector is connect with the anode of diode D2, output end of the cathode of diode D2 as first control circuit, and the two of resistance R1
End is connected to the emitter and base stage of triode Q1, and the base stage of triode Q1 passes through the collector of resistance R2 and triode Q2
Connection, the emitter ground connection of triode Q2, the base stage of triode Q2 are grounded by resistance R5, the base stage and resistance R4 of triode Q2
One end connection, the other end of resistance R14 connect as the control terminal of first control circuit with controller, the cathode of diode D1
The collector of triode Q2 is connected to by capacitor C1.
4. DC relay drive control circuit according to claim 1, it is characterised in that: the second control circuit includes
Resistance R5, resistance R7 and optocoupler G1；
One end of the resistance R6 is connected to controller as the control terminal of second control circuit, and the other end of resistance R6 passes through electricity
R7 ground connection is hindered, the points of common connection between resistance R6 and resistance R7 is connect with the anode of the light emitting diode of optocoupler G1, optocoupler G1
Light emitting diode cathode ground connection, the collector of the phototriode of optocoupler G1 is connected to the output end of first control circuit,
The emitter of the phototriode of optocoupler G1 is connected to the control terminal of driving output circuit.
5. DC relay drive control circuit according to claim 3, it is characterised in that: it further include protection circuit, it is described
The input terminal of protection circuit is connected to the source electrode of metal-oxide-semiconductor Q3, and the output end of circuit is protected to be connected to the collector of triode Q2.
6. DC relay drive control circuit according to claim 5, it is characterised in that: the protection circuit includes two poles
Pipe D3 and resistance R3；
The anode of the diode D3 is connected to the source electrode of metal-oxide-semiconductor Q3, and the cathode of diode D1 is connected to three poles by resistance R3
The collector of pipe Q2.
7. DC relay drive control circuit according to claim 1, it is characterised in that: it further include input circuit, it is described
The input terminal of input circuit is connect with power supply VCC, the output end of input circuit respectively with the power input of first control circuit
It is connected with the power input of drive control circuit.
8. DC relay drive control circuit according to claim 7, it is characterised in that: the input circuit is diode
D1。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811289127.4A CN109378252B (en) | 2018-10-31 | 2018-10-31 | Direct current relay drive control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811289127.4A CN109378252B (en) | 2018-10-31 | 2018-10-31 | Direct current relay drive control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109378252A true CN109378252A (en) | 2019-02-22 |
| CN109378252B CN109378252B (en) | 2020-11-03 |
Family
ID=65390977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811289127.4A Active CN109378252B (en) | 2018-10-31 | 2018-10-31 | Direct current relay drive control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109378252B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008186645A (en) * | 2007-01-29 | 2008-08-14 | Fuji Electric Fa Components & Systems Co Ltd | Electromagnetic relay driving device |
| CN202332733U (en) * | 2011-11-10 | 2012-07-11 | 湖南南车时代电动汽车股份有限公司 | Switching value isolation circuit for relay |
| CN202487497U (en) * | 2012-01-12 | 2012-10-10 | 北京鼎汉技术股份有限公司 | Isolation drive circuit of direct current contactor |
| US20130201594A1 (en) * | 2012-02-03 | 2013-08-08 | Pao-Hung Lin | Driving circuit for relay |
| CN105743213A (en) * | 2016-04-06 | 2016-07-06 | 隆鑫通用动力股份有限公司 | Power generator and mains supply automatic switching system |
-
2018
- 2018-10-31 CN CN201811289127.4A patent/CN109378252B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008186645A (en) * | 2007-01-29 | 2008-08-14 | Fuji Electric Fa Components & Systems Co Ltd | Electromagnetic relay driving device |
| CN202332733U (en) * | 2011-11-10 | 2012-07-11 | 湖南南车时代电动汽车股份有限公司 | Switching value isolation circuit for relay |
| CN202487497U (en) * | 2012-01-12 | 2012-10-10 | 北京鼎汉技术股份有限公司 | Isolation drive circuit of direct current contactor |
| US20130201594A1 (en) * | 2012-02-03 | 2013-08-08 | Pao-Hung Lin | Driving circuit for relay |
| CN105743213A (en) * | 2016-04-06 | 2016-07-06 | 隆鑫通用动力股份有限公司 | Power generator and mains supply automatic switching system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109378252B (en) | 2020-11-03 |
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