CN203521324U - Relay driving circuit - Google Patents
Relay driving circuit Download PDFInfo
- Publication number
- CN203521324U CN203521324U CN201320690367.1U CN201320690367U CN203521324U CN 203521324 U CN203521324 U CN 203521324U CN 201320690367 U CN201320690367 U CN 201320690367U CN 203521324 U CN203521324 U CN 203521324U
- Authority
- CN
- China
- Prior art keywords
- relay
- drive circuit
- coil
- control signal
- circuit
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The utility model discloses a relay driving circuit. The relay driving circuit comprises a control signal, a driving circuit and a relay. The control signal is connected to the driving circuit through an optocoupler isolation circuit. The driving circuit is connected with the coil of the relay. The optocoupler isolation circuit is composed of a photoelectric coupler U1. The input end of the U1 is connected with a +5V power source, and the output end of the U1 is connected with a +24V power source. The driving circuit is composed of resistors R2, R3 and a transistor Q1. The output end of the photoelectric coupler U1 is connected with the base of the transistor Q1 through the resistor R2. The resistor R3 is connected in parallel between the base and the emitter of the transistor Q1. The emitter of the transistor Q1 is grounded. The collector of the transistor Q1 is connected with the coil J of the relay. In the circuit of the utility model, the control signal sent by a single chip microcomputer is isolated and amplified through the optocoupler isolation circuit, so not only the control signal is stable, and but also a large enough driving current can be provided; two ends of the coil of the relay are connected in parallel with a light-emitting diode, so the working state of the relay is more intuitional.
Description
Technical field
The utility model relates to Control technical field, particularly relates to a kind of drive circuit of relay.
Background technology
Relay is a kind of electronic control device, and it has control system and is conventionally applied in automatic control circuit by control system, and it is actually a kind of " automatic switch " that removes to control larger electric current with less electric current.Therefore play the effects such as automatic adjusting, safeguard protection, change-over circuit in circuit.Electromagnetic type relay is generally comprised of iron core, coil, armature, contact reed etc.As long as add certain voltage at coil two ends, in coil, will flow through certain electric current, thereby generation galvanomagnetic effect, armature will overcome the pulling force of return spring under the effect of electromagnetic attracting force to be inhaled to iron core, thereby with moving contact and fixed contact (normally opened contact) adhesive of moving armature.After coil blackout, the suction of electromagnetism also disappears thereupon, and armature will return to original position at the reaction force of spring, makes moving contact and original fixed contact (normally-closed contact) adhesive.If drive circuit can not provide enough large operating current, make the adhesive of relay unstable; If control signal is unstable, also can affect the work of relay; Most of relay is often arranged on the inside of electric equipment, and its operating state is not directly perceived.
Utility model content
Technical problem to be solved in the utility model is a kind of relay drive circuit proposing for above-mentioned prior art defect, and this drive circuit not only can provide enough large drive current, and stable control signal can be provided.
The utility model requires the technical problem solving to be achieved through the following technical solutions:
A drive circuit for relay, comprises control signal, drive circuit and relay, it is characterized in that: described control signal is connected to drive circuit through optical coupling isolation circuit, and drive circuit is connected with the coil of relay.
Described control signal is sent by single-chip microcomputer.
Described optical coupling isolation circuit electricity routing optocoupler U1 forms, the connect+5V of input power supply of U1, connect+24V of the output end power of U1.
Described drive circuit is comprised of resistance R 2, R3 and transistor Q1, and the output of photoelectrical coupler U1 is connected with the base stage of Q1 through R2, and resistance R 3 is attempted by between the base stage and emitter of Q1, the grounded emitter of Q1, the coil J of the collector connecting relay of Q1.
Described relay pack vinculum circle J, diode VD1 inverse parallel, on coil J, after light-emitting diode is connected with resistance R 4, is connected in parallel on the two ends of coil J.
The utility model beneficial effect is: the control signal of being sent by single-chip microcomputer, through photoelectric coupling circuit isolation amplification, not only can make control signal stable, and enough large drive current can be provided; The coil two ends parallel connection of relay light-emitting diode, make the operating state of relay more directly perceived.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further:
Fig. 1 is the circuit diagram of the utility model relay drive circuit.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Below with reference to Fig. 1, describe the utility model in detail, a kind of drive circuit of relay, comprises control signal, drive circuit and relay.Described control signal is connected to drive circuit through optical coupling isolation circuit, and drive circuit is connected with the coil of relay.Described control signal is sent by single-chip microcomputer, and described optical coupling isolation circuit electricity routing optocoupler U1 forms.The control signal of being sent by single-chip microcomputer is connected with the input of photoelectrical coupler U1 through R1, the connect+5V of input power supply of U1, connect+24V of the output end power of U1.Described drive circuit is comprised of resistance R 2, R3 and transistor Q1, and the output of photoelectrical coupler U1 is connected with the base stage of Q1 through R2, and resistance R 3 is attempted by between the base stage and emitter of Q1, the grounded emitter of Q1, the coil J of the collector connecting relay of Q1.Relay pack vinculum circle J, diode VD1 inverse parallel, on coil J, after light-emitting diode is connected with resistance R 4, is connected in parallel on the two ends of coil J.
During concrete operations, when having single-chip microcomputer to send control signal, control signal is through photoelectrical coupler U1 isolation amplification, U1 is output as transistor Q1 base current is provided, the rapid conducting of Q1, the coil J energising of relay, the normally opened contact closure of relay, normally-closed contact disconnect.Because relay major part is mounted in the inside of machine, its operating state is not directly perceived, the circuit of being connected by resistance R 4 and light-emitting diode by the two ends parallel connection of the coil J at relay, when relay coil J switches on, light-emitting diode VD2 is bright, and people can understand the operating state of relay very intuitively.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. a drive circuit for relay, comprises control signal, drive circuit and relay, it is characterized in that: described control signal is connected to drive circuit through optical coupling isolation circuit, and drive circuit is connected with the coil of relay.
2. according to the drive circuit of a kind of relay claimed in claim 1, it is characterized in that: described control signal is sent by single-chip microcomputer.
3. according to the drive circuit of a kind of relay claimed in claim 1, it is characterized in that: described optical coupling isolation circuit electricity routing optocoupler U1 forms, the connect+5V of input power supply of U1, connect+24V of the output end power of U1.
4. according to the drive circuit of a kind of relay claimed in claim 1, it is characterized in that: described drive circuit is comprised of resistance R 2, R3 and transistor Q1, the output of photoelectrical coupler U1 is connected with the base stage of Q1 through R2, resistance R 3 is attempted by between the base stage and emitter of Q1, the grounded emitter of Q1, the coil J of the collector connecting relay of Q1.
5. according to the drive circuit of a kind of relay claimed in claim 1, it is characterized in that: described relay pack vinculum circle J, diode VD1 inverse parallel, on coil J, after light-emitting diode is connected with resistance R 4, is connected in parallel on the two ends of coil J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320690367.1U CN203521324U (en) | 2013-11-04 | 2013-11-04 | Relay driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320690367.1U CN203521324U (en) | 2013-11-04 | 2013-11-04 | Relay driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203521324U true CN203521324U (en) | 2014-04-02 |
Family
ID=50380214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320690367.1U Expired - Fee Related CN203521324U (en) | 2013-11-04 | 2013-11-04 | Relay driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203521324U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594289A (en) * | 2013-11-04 | 2014-02-19 | 安徽省烟草公司池州市公司 | Drive circuit of relay |
| CN106505376A (en) * | 2016-12-22 | 2017-03-15 | 惠州Tcl照明电器有限公司 | Electric quantity-metering socket |
| 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 |
| CN108054796A (en) * | 2017-12-20 | 2018-05-18 | 华中科技大学 | A kind of accumulator automatic charge control circuit |
| CN110460158A (en) * | 2019-08-15 | 2019-11-15 | 中国科学院紫金山天文台 | A kind of astronomical telescope instrument and equipment remote power supply distribution system |
-
2013
- 2013-11-04 CN CN201320690367.1U patent/CN203521324U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594289A (en) * | 2013-11-04 | 2014-02-19 | 安徽省烟草公司池州市公司 | Drive circuit of relay |
| CN106505376A (en) * | 2016-12-22 | 2017-03-15 | 惠州Tcl照明电器有限公司 | Electric quantity-metering socket |
| 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 |
| CN108054796A (en) * | 2017-12-20 | 2018-05-18 | 华中科技大学 | A kind of accumulator automatic charge control circuit |
| CN108054796B (en) * | 2017-12-20 | 2020-10-16 | 华中科技大学 | Automatic control circuit for charging storage battery |
| CN110460158A (en) * | 2019-08-15 | 2019-11-15 | 中国科学院紫金山天文台 | A kind of astronomical telescope instrument and equipment remote power supply distribution system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103594289A (en) | Drive circuit of relay | |
| CN203521324U (en) | Relay driving circuit | |
| CN107069655B (en) | Voltage protection circuit | |
| CN203118870U (en) | Improved relay control circuit | |
| CN104078923B (en) | Over under-voltage protection circuit and lighting device | |
| CN104767505A (en) | Switching circuit with circuit protection function | |
| CN201860094U (en) | Short circuit protection circuit for switch power | |
| CN104241024A (en) | Relay control circuit | |
| CN107046418B (en) | Single live wire power-taking circuit | |
| CN203118869U (en) | Relay control circuit | |
| CN105551886A (en) | Low-power dissipation relay drive circuit | |
| CN206848770U (en) | excavator control unit based on Bluetooth technology | |
| CN206558439U (en) | A kind of direct insertion electronic type auxiliary reclay | |
| CN205452170U (en) | Relay drive circuit of battery management system of electric automobile | |
| CN202512391U (en) | Inductive switch controlling device | |
| CN208834152U (en) | A kind of single-chip microcontroller control direct-flow current consumer circuit | |
| CN205265649U (en) | Control circuit based on triode switching action | |
| CN202996008U (en) | Infrared remote control detection device | |
| CN201682258U (en) | Intrinsic safety type component | |
| CN201569107U (en) | Relay output circuit with function of isolation for central air conditioning controller | |
| CN205479605U (en) | High -power solenoid valve isolating driver ware | |
| CN202405180U (en) | Direct-current self-holding relay | |
| CN201556292U (en) | Remote controller | |
| CN106683946A (en) | Direct insert type electronic intermediate relay | |
| CN203675402U (en) | External control circuit of indoor energy efficiency management terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20151104 |
|
| EXPY | Termination of patent right or utility model |