CN203191746U - Closed-loop relay control system - Google Patents
Closed-loop relay control system Download PDFInfo
- Publication number
- CN203191746U CN203191746U CN 201320132712 CN201320132712U CN203191746U CN 203191746 U CN203191746 U CN 203191746U CN 201320132712 CN201320132712 CN 201320132712 CN 201320132712 U CN201320132712 U CN 201320132712U CN 203191746 U CN203191746 U CN 203191746U
- Authority
- CN
- China
- Prior art keywords
- resistance
- relay
- control system
- triode
- effect transistor
- 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 - Lifetime
Links
- 230000005669 field effect Effects 0.000 claims abstract description 26
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Images
Landscapes
- Relay Circuits (AREA)
Abstract
The utility model provides a closed-loop relay control system. The closed-loop relay control system comprises a single chip microcomputer, a field effect transistor, a resistor R1, a resistor R2, a resistor R3, a triode and a phase inverter, wherein a control end of the single chip microcomputer is connected to the gate of the field effect transistor, the drain of the field effect transistor is connected to an input loop coil of a relay, the source of the field effect transistor is connected to the resistor R1 and the resistor R2, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected to the base of the triode, the collector of the triode is connected to the resistor R3 and an input end of the phase inverter, the emitter of the triode is grounded, the other end of the resistor R3 is connected to a voltage source, and a reverse-phase output end of the phase inverter is connected to a feedback end of the single chip microcomputer. According to the closed-loop relay control system, whether the relay is in a real switching-on or switching-off control state currently as required can be further confirmed by using a feedback signal, and the working reliability of the relay control system is improved.
Description
Technical field
The utility model relates to relay control technology field, relates to a kind of closed-loop control system of relay more specifically.
Background technology
Relay is that the little electric current of a kind of usefulness goes to control big electric current running " automatic switch ", when input quantity (energizing quantity) variation of its input control loop reaches the regulation requirement, makes controlled volume that predetermined step takes place in electric output circuit and changes.Generally when input in the input control system of relay had electric current, armature contact was adsorbed in the magnetic field of its generation, thereby system works is controlled in conducting.Therefore can the input control system of relay operate as normal be the key point of relay work, existing relay all can only be done open loop control, do not utilize feedback signal to detect relay and whether be in normal duty, that is to say whether relay requires to be in real attracting state or off-state according to control, break down such as the input control system when relay inside, although provide the driving electric signal to it, but it can not carry out operate as normal, thereby can't realize the control to output circuit, can cause the reliability of entire circuit system to reduce like this, have a strong impact on its control performance.
Summary of the invention
The utility model is to overcome above-mentioned prior art repeat circuit can only open loop control, can't guarantee whether relay really is in the defective of normal operating conditions, introduced the closed-loop control system of relay, by utilizing feedback signal to confirm further whether current relay is in the state of a control of real adhesive or disconnection as requested, to improve the functional reliability of relay control system.
It is as follows that the utility model solves the problems of the technologies described above the technical scheme of taking:
A kind of relay closed-loop control system, comprise single-chip microcomputer, field effect transistor, resistance R 1, resistance R 2, resistance R 3, triode and phase inverter, the control end of described single-chip microcomputer is connected to the grid of field effect transistor, the drain electrode of described field effect transistor is connected in the input circuit coil of relay, the source electrode of field effect transistor is connected to resistance R 1 and resistance R 2, the other end ground connection of resistance R 1, the other end of resistance R 2 is connected to the base stage of described triode, the collector of described triode is connected to the input end of resistance R 3 and phase inverter, the grounded emitter of triode, the other end of resistance R 3 is connected to voltage source, and the inverse output terminal of phase inverter is connected to the feedback end of single-chip microcomputer.
Further according to relay closed-loop control system described in the utility model, wherein said triode is NPN type triode.
Further according to relay closed-loop control system described in the utility model, wherein said field effect transistor is N channel field-effect pipe.
Further according to relay closed-loop control system described in the utility model, wherein said resistance R 1, resistance R 2 are identical with the resistance value of resistance R 3.
Further according to relay closed-loop control system described in the utility model, wherein said voltage source is 5V or 12V or 24V.
At least can reach following technique effect by the technical solution of the utility model:
1) introduced feedback circuit, made MCU obtain the real-time working state of relay, guaranteed that relay is in the state of a control of real adhesive or disconnection as requested, has greatly improved the functional reliability of relay control system;
2) detect by the feedback to the relay duty, guaranteed the overall work safety of control circuit.
Description of drawings
Accompanying drawing 1 is the circuit structure diagram of relay closed-loop control system described in the utility model.
Embodiment
Below in conjunction with accompanying drawing relay closed-loop control system described in the utility model and principle of work thereof are described in detail, but do not limit protection domain of the present utility model with this.
As shown in Figure 1, relay closed-loop control system described in the utility model comprises single-chip microcomputer, field effect transistor M1, resistance R 1, R2 and R3, triode Q1 and phase inverter,
The control end of described single-chip microcomputer is connected to the grid of field effect transistor M1, the drain electrode of field effect transistor M1 is connected to the 2nd pin of solenoid in the input control system of relay, the 1st pin of solenoid is received the VCC voltage source in the input control system of relay, the source electrode of field effect transistor M1 is connected to resistance R 1 and R2, the other end ground connection of resistance R 1, the other end of resistance R 2 is connected to the base stage of triode Q1, the collector of triode Q1 is connected to the 1st pin (input end) of R3 and phase inverter, the grounded emitter of triode Q1, the other end of resistance R 3 is connected to voltage source V CC, and the 2nd pin (inverse output terminal) of phase inverter is connected to the feedback end of single-chip microcomputer.
Wherein, the VCC voltage source can be 5V or 12V or 24V, specifically should see the relay of selection and the born voltage of triode Q1; Wherein preferred described triode Q1 is NPN type triode, and described field effect transistor is N channel field-effect pipe; Wherein preferred described resistance R 1, resistance R 2 are identical with the resistance value of resistance R 3.
The principle of work of the above-mentioned relay closed-loop control system that the utility model provides is as follows:
As shown in Figure 1, when single-chip microcomputer will make the relay adhesive, single-chip microcomputer is at " control " pin output high level, then field effect transistor M1 conducting, thereby added forward voltage source VCC at the coil two ends of relay (the 1st pin and the 2nd pin), the coil electricity of relay, when the coil of relay can operate as normal, thereby being formed with electric current in the coil and producing magnetic field makes the relay adhesive remove to control output circuit, electric current in the coil will be by field effect transistor M1 simultaneously, at this moment resistance R 2 ends have just obtained electric current, then the base stage of triode Q1 becomes high level, cause triode Q1 conducting, electric current flows to emitter from the collector of triode Q1, and do not flow to 1 pin of phase inverter, that is triode Q1 conducting this moment, input end-1 pin the ground connection that is equivalent to phase inverter, thereby 1 pin of phase inverter has become low level by original high level, this moment, inverse output terminal-2 pin of phase inverter was just exported high level, and be defeated by " feedback " pin of single-chip microcomputer, if therefore single-chip microcomputer to detect " feedback " pin at this moment be high level, then show in the coil in the relay input control system and alive, relay is in real attracting state, and is working properly.Otherwise then may there be the fault that electric current such as open circuit can't circulate in the coil of relay.
In like manner, when single-chip microcomputer will make relay disconnect, single-chip microcomputer is in " control " pin output low level, then field effect transistor M1 disconnects, thereby the coil blackout of relay, if this moment, the coil of relay was in normal operating conditions, then it should remain open, field effect transistor M1 no current passes through, and is equivalent to the base stage of triode Q1 this moment through resistance R 2 and R1 ground connection, and the base stage of triode Q1 becomes low level so, this moment, Q1 disconnected, 1 pin that is equivalent to phase inverter is pulled to VCC through resistance R 3, and then 1 pin of phase inverter becomes high level, this moment phase inverter just output low level of reverse output pin " 2 pin ", and be defeated by " feedback " pin of single-chip microcomputer, therefore if to detect " feedback " pin at this moment be low level to single-chip microcomputer, show relay successfully disconnection, be in normal operating conditions.Otherwise then the fault that can't disconnect may appear in the coil inside of relay input control system.
Therefore closed-loop control system described in the utility model guarantees that by introducing feedback signal relay is in normal duty, and the job stability of control relay circuit system greatly is provided.
Below only be that preferred implementation of the present utility model is described; the technical solution of the utility model is not limited to this; the any known distortion that those skilled in the art do on the basis of major technique of the present utility model design all belongs to the claimed technology category of the utility model, and the concrete protection domain of the utility model is as the criterion with the record of claims.
Claims (5)
1. relay closed-loop control system, it is characterized in that, comprise single-chip microcomputer, field effect transistor, resistance R 1, resistance R 2, resistance R 3, triode and phase inverter, the control end of described single-chip microcomputer is connected to the grid of field effect transistor, the drain electrode of described field effect transistor is connected in the input circuit coil of relay, the source electrode of field effect transistor is connected to resistance R 1 and resistance R 2, the other end ground connection of resistance R 1, the other end of resistance R 2 is connected to the base stage of described triode, the collector of described triode is connected to the input end of resistance R 3 and phase inverter, the grounded emitter of triode, the other end of resistance R 3 is connected to voltage source, and the inverse output terminal of phase inverter is connected to the feedback end of single-chip microcomputer.
2. relay closed-loop control system according to claim 1 is characterized in that, wherein said triode is NPN type triode.
3. relay closed-loop control system according to claim 1 is characterized in that, wherein said field effect transistor is N channel field-effect pipe.
4. relay closed-loop control system according to claim 1 is characterized in that, wherein said resistance R 1, resistance R 2 are identical with the resistance value of resistance R 3.
5. relay closed-loop control system according to claim 1 is characterized in that, described voltage source is 5V or 12V or 24V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320132712 CN203191746U (en) | 2013-03-22 | 2013-03-22 | Closed-loop relay control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320132712 CN203191746U (en) | 2013-03-22 | 2013-03-22 | Closed-loop relay control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203191746U true CN203191746U (en) | 2013-09-11 |
Family
ID=49108594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320132712 Expired - Lifetime CN203191746U (en) | 2013-03-22 | 2013-03-22 | Closed-loop relay control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203191746U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034996A (en) * | 2014-06-04 | 2014-09-10 | 安徽江淮汽车股份有限公司 | Detection circuit for high-voltage connector |
| CN112327721A (en) * | 2020-11-20 | 2021-02-05 | 北京捍御者信息科技有限公司 | Control system and method of feedback switch |
-
2013
- 2013-03-22 CN CN 201320132712 patent/CN203191746U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104034996A (en) * | 2014-06-04 | 2014-09-10 | 安徽江淮汽车股份有限公司 | Detection circuit for high-voltage connector |
| CN112327721A (en) * | 2020-11-20 | 2021-02-05 | 北京捍御者信息科技有限公司 | Control system and method of feedback switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205136752U (en) | Energy -conserving drive arrangement of low pressure electromagnetic type electrical apparatus | |
| CN204597830U (en) | Motor control assembly | |
| CN104425184A (en) | Control device for switching on and switching off relay and air conditioner | |
| CN203659753U (en) | Driving circuit of relay | |
| CN103024973B (en) | LED (Light-Emitting Diode) lamp and overcurrent protection circuit thereof | |
| CN203191746U (en) | Closed-loop relay control system | |
| CN203251265U (en) | Motor switching circuit and motor driving device | |
| CN105202250A (en) | Energy-saving drive device for low-voltage electromagnetic type electric appliance | |
| CN104241024A (en) | Relay control circuit | |
| CN108488948A (en) | Air conditioner, air conditioner control system and outdoor unit switch circuit | |
| CN103001620A (en) | Gate-modified IGBT (insulated gate bipolar transistor) driving circuit | |
| CN205304240U (en) | Control circuit is prevented joining conversely by high -power direct current | |
| CN104465221A (en) | Relay control circuit | |
| CN202231609U (en) | Current-limiting device and electric system | |
| CN203788195U (en) | Automobile start motor protection circuit | |
| CN202634338U (en) | Motor circuit with power off brake function | |
| CN109167592A (en) | Low-cost and high-performance switch tube driving circuit | |
| CN202797902U (en) | Short circuit protection circuit used for booster circuit | |
| CN202957794U (en) | Optical coupler drive circuit based on power supply of single power source | |
| CN109471025B (en) | Method for realizing electromagnetic relay line detection and feedback signal detection by double voltages | |
| CN203813714U (en) | Motor driving device and frequency-conversion household electrical appliance | |
| CN209087695U (en) | A kind of control circuit of permanent magnetism coil | |
| CN202586914U (en) | Engine starting motor electronic relay | |
| CN208707613U (en) | One-key switch electromechanics road and electric terminal equipment | |
| CN208508793U (en) | A kind of relay power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |