CN103594289A - Drive circuit of relay - Google Patents
Drive circuit of relay Download PDFInfo
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- CN103594289A CN103594289A CN201310539120.4A CN201310539120A CN103594289A CN 103594289 A CN103594289 A CN 103594289A CN 201310539120 A CN201310539120 A CN 201310539120A CN 103594289 A CN103594289 A CN 103594289A
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Abstract
The invention discloses a drive circuit of a relay. The drive circuit of the relay comprises control signals, the drive circuit and the relay. The control signals are connected to the drive circuit through an opto-coupler isolation circuit, the drive circuit is connected with a coil of the relay, the opto-coupler isolation circuit comprises a photoelectric coupler U1, an input end power supply of the photoelectric coupler U1 is connected with +5V, an output end power supply of the photoelectric coupler U1 is connected with +24V, the drive circuit is composed of a resistor R2, a resistor R3 and a transistor Q1, the output end of the photoelectric coupler U1 is connected with the base electrode of the transistor Q1 through the resistor R2, the resistor R3 is connected between the base electrode and the emitting electrode of the transistor Q1 in parallel, the emitting electrode of the transistor Q1 is grounded, and the collector electrode of the transistor Q1 is connected with the coil J of the relay. According to the drive circuit of the relay, the control signals emitted by a single chip microcomputer are amplified through the opto-coupler isolation circuit, the control signals are made to be stable, and a large enough driving current can be provided; the two ends of the coil of the relay are connected with light-emitting diodes in parallel, so that the working state of the relay is more visual.
Description
Technical field
The present invention relates to Control technical field, particularly relate 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.
Summary of the invention
Technical problem to be solved by this invention 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 present invention 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.
Beneficial effect of the present invention 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 present invention will be further described:
Fig. 1 is the circuit diagram of relay drive circuit of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Below with reference to Fig. 1, describe the present invention 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 invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention 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 |
|---|---|---|---|
| CN201310539120.4A CN103594289A (en) | 2013-11-04 | 2013-11-04 | Drive circuit of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310539120.4A CN103594289A (en) | 2013-11-04 | 2013-11-04 | Drive circuit of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103594289A true CN103594289A (en) | 2014-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310539120.4A Pending CN103594289A (en) | 2013-11-04 | 2013-11-04 | Drive circuit of relay |
Country Status (1)
| Country | Link |
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| CN (1) | CN103594289A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615051A (en) * | 2015-01-13 | 2015-05-13 | 嘉兴清源电气科技有限公司 | Smart home remote control module with optocoupler drive |
| CN104916492A (en) * | 2015-06-15 | 2015-09-16 | 成都广迈科技有限公司 | Relay control circuit |
| CN104916493A (en) * | 2015-06-15 | 2015-09-16 | 成都广迈科技有限公司 | Double-path driven relay control circuit |
| CN104934263A (en) * | 2015-06-15 | 2015-09-23 | 成都广迈科技有限公司 | Relay control circuit capable of reducing power consumption |
| CN105047476A (en) * | 2015-06-15 | 2015-11-11 | 成都广迈科技有限公司 | Low-power-consumption relay control circuit |
| CN105047477A (en) * | 2015-06-15 | 2015-11-11 | 成都广迈科技有限公司 | Relay energy-saving control circuit |
| CN107863276A (en) * | 2017-12-07 | 2018-03-30 | 华北科技学院 | A kind of self-shield D.C. contactor drive circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201877363U (en) * | 2010-12-16 | 2011-06-22 | 国网电力科学研究院 | Relay drive circuit based on current transmission and transformation isolation technology |
| 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 |
| CN203118870U (en) * | 2013-03-28 | 2013-08-07 | 嘉兴市英力电子科技有限公司 | Improved relay control circuit |
| CN203521324U (en) * | 2013-11-04 | 2014-04-02 | 安徽省烟草公司池州市公司 | Relay driving circuit |
-
2013
- 2013-11-04 CN CN201310539120.4A patent/CN103594289A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201877363U (en) * | 2010-12-16 | 2011-06-22 | 国网电力科学研究院 | Relay drive circuit based on current transmission and transformation isolation technology |
| 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 |
| CN203118870U (en) * | 2013-03-28 | 2013-08-07 | 嘉兴市英力电子科技有限公司 | Improved relay control circuit |
| CN203521324U (en) * | 2013-11-04 | 2014-04-02 | 安徽省烟草公司池州市公司 | Relay driving circuit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615051A (en) * | 2015-01-13 | 2015-05-13 | 嘉兴清源电气科技有限公司 | Smart home remote control module with optocoupler drive |
| CN104916492A (en) * | 2015-06-15 | 2015-09-16 | 成都广迈科技有限公司 | Relay control circuit |
| CN104916493A (en) * | 2015-06-15 | 2015-09-16 | 成都广迈科技有限公司 | Double-path driven relay control circuit |
| CN104934263A (en) * | 2015-06-15 | 2015-09-23 | 成都广迈科技有限公司 | Relay control circuit capable of reducing power consumption |
| CN105047476A (en) * | 2015-06-15 | 2015-11-11 | 成都广迈科技有限公司 | Low-power-consumption relay control circuit |
| CN105047477A (en) * | 2015-06-15 | 2015-11-11 | 成都广迈科技有限公司 | Relay energy-saving control circuit |
| CN107863276A (en) * | 2017-12-07 | 2018-03-30 | 华北科技学院 | A kind of self-shield D.C. contactor drive circuit |
| CN107863276B (en) * | 2017-12-07 | 2021-04-02 | 华北科技学院 | Self-protection direct current contactor drive circuit |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140219 |