CN212303558U - Electromagnetic relay contact or coil abnormity monitoring circuit - Google Patents
Electromagnetic relay contact or coil abnormity monitoring circuit Download PDFInfo
- Publication number
- CN212303558U CN212303558U CN202021573681.8U CN202021573681U CN212303558U CN 212303558 U CN212303558 U CN 212303558U CN 202021573681 U CN202021573681 U CN 202021573681U CN 212303558 U CN212303558 U CN 212303558U
- Authority
- CN
- China
- Prior art keywords
- coil
- relay contact
- output terminal
- control chip
- resistor
- 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.)
- Active
Links
Images
Landscapes
- Emergency Alarm Devices (AREA)
Abstract
The utility model discloses an electromagnetic relay contact or coil abnormity monitoring circuit, which comprises a control end and a controlled end, wherein the control end comprises an input terminal and a coil; the controlled end comprises an output terminal and a relay contact; still including the power and carry out the control chip, opto-coupler and the alarm output terminal that supply power by the power, control chip links to each other with the opto-coupler to connect the signal of telecommunication that is used for acquireing this relay contact on the relay contact through this opto-coupler, control chip links to each other with the coil simultaneously and is used for acquireing the signal of telecommunication of coil, and control chip is based on the signal of telecommunication between relay contact and coil, exports alarm signal through the alarm output terminal. The utility model has the advantages of it is following and effect: the utility model discloses can take place when unusual at electromagnetic relay contact or coil, can in time monitor and report to the police.
Description
Technical Field
The utility model relates to a relay technical field, in particular to electromagnetic relay contact or coil abnormity monitoring circuit.
Background
An electromagnetic relay is an electronic control device, usually used in automatic control circuits, and is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage.
At present, a normally open contact control circuit of an electromagnetic relay is generally adopted, and abnormal alarm monitoring of a contact or a coil is not provided; many occasions (for example fill electric pile) all need a kind of relay that has the contact unusual alarm signal output occasionally, when the relay coil loses electric, if the contact adhesion, then the load still has the forceful electric power, brings the hidden danger for equipment and personal safety. Therefore, it is necessary to provide a circuit capable of monitoring and alarming in time when the electromagnetic relay contact is abnormal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electromagnetic relay contact or coil abnormity monitoring circuit to solve the problem that proposes among the background art.
The above technical purpose of the present invention can be achieved by the following technical solutions: an electromagnetic relay contact or coil abnormity monitoring circuit comprises a control end and a controlled end, wherein the control end comprises an input terminal and a coil connected with the input terminal, and the coil can generate an electromagnetic effect to control the controlled end when the input terminal is electrified;
the controlled end comprises an output terminal and a relay contact connected with the output terminal, the output terminal supplies power to a load, the relay contact is controlled by a coil to generate attraction or breaking action, and a loop for supplying power to the load by the output terminal is switched on or off under the attraction or breaking action of the relay contact;
still including the power and carry out control chip, opto-coupler and the alarm output terminal that supplies power by the power, control chip link to each other with the opto-coupler to be used for acquireing the signal of telecommunication of this relay contact on the relay contact through this opto-coupler connection, control chip link to each other with the coil simultaneously and be used for acquireing the signal of telecommunication of coil, just control chip based on relay contact and coil signal of telecommunication between them, export alarm signal through the alarm output terminal.
The further setting is that: the control chip and the alarm output terminal are connected with a driving circuit, the driving circuit comprises a triode Q1, a resistor R1, a delay capacitor C1 and a resistor R2, one end of the resistor R1 is connected with the output end of the control chip, the other end of the resistor R1 is connected with the base of a triode Q1, one end of the delay capacitor C1 is connected with one end of the resistor R2, the emitter of the triode Q1, the other end of the delay capacitor C1 and the other end of the resistor R2 are all grounded, and the collector of the triode Q1 is connected with the alarm output terminal.
The further setting is that: the power supply comprises a power supply terminal and a voltage stabilizing circuit, wherein the power supply terminal is connected with an external power supply and supplies power to the control chip after being stabilized by the voltage stabilizing circuit.
The utility model has the advantages that:
the utility model can monitor and alarm in time when the electromagnetic relay contact or coil is abnormal; when the relay contacts are adhered and the coil loses power, the control chip monitors that the controlled end has strong current, the output end of the control chip outputs a high-level signal to drive the triode Q1 to be conducted, the collector of the triode Q1 has low level, and the collector is connected with the alarm output terminal and can be externally connected with an alarm part to alarm; or the contact circuit controls a circuit at the later stage to perform forced power-off on the power supply of the load, thereby ensuring the safety of equipment and personnel. Meanwhile, the utility model also has the function of alarming and outputting the abnormal phenomena of poor contact of the relay contact and open circuit of the coil; when the coil is electrified, if the contact of the relay contact is not communicated or the coil is open-circuited, the control chip detects that the IN2 or IN1 has no voltage, namely, the judgment is abnormal, the output end of the control chip outputs a high-level signal, the triode Q1 is switched on, the collector of the triode Q1 is at a low level of 0V, the low-level signal is led out through the alarm output terminal, and the low-level signal can be externally connected with an alarm element and also provides a signal for a rear-stage trigger circuit.
Drawings
Fig. 1 is a schematic diagram of the embodiment.
In the figure: 11. an input terminal; 12. a coil; 21. a live wire inlet end; 22. a live wire outlet end; 23. a zero line end; 3. a relay contact; 41. a control chip; 42. an optical coupler; 43. an alarm output terminal; 51. a power supply terminal; 52. a voltage stabilizing circuit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, an abnormality monitoring circuit for a contact or a coil of an electromagnetic relay includes a control end and a controlled end, wherein the control end includes an input terminal 11 and a coil 12 connected to the input terminal 11, and the coil 12 generates an electromagnetic effect when the input terminal 11 is energized to control the controlled end;
the controlled end comprises an output terminal and a relay contact 3 connected with the output terminal, the output terminal supplies power to the load, the relay contact 3 is controlled by the coil 12 to generate attraction or breaking action, and a loop of which the output terminal supplies power to the load is switched on or off under the attraction or breaking action of the relay contact 3.
The relay contact device further comprises a power supply, and a control chip 41, an optical coupler 42 and an alarm output terminal 43 which are powered by the power supply, wherein the control chip 41 is connected with the optical coupler 42 and connected to the relay contact 3 through the optical coupler 42 to obtain an electric signal of the relay contact 3, the control chip 41 is connected with the coil 12 simultaneously to obtain an electric signal of the coil 12, and the control chip 41 outputs an alarm signal through the alarm output terminal 43 based on the electric signals of the relay contact 3 and the coil 12. A driving circuit is connected between the control chip 41 and the alarm output terminal 43, the driving circuit comprises a triode Q1, a resistor R1, a delay capacitor C1 and a resistor R2, one end of the resistor R1 is connected with the output end of the control chip 41, the other end of the resistor R1 is connected with the base of the triode Q1, one end of the delay capacitor C1 and one end of the resistor R2, the emitter of the triode Q1, the other end of the delay capacitor C1 and the other end of the resistor R2 are all grounded, and the collector of the triode Q1 is connected with the alarm output terminal 43.
In this embodiment, the control chip 41 may be a single chip or a gate circuit; the alarm output terminal 43 may be connected to an alarm device alarm or a subsequent control circuit.
The power supply comprises a power supply terminal 51 and a voltage stabilizing circuit 52, wherein the power supply terminal 51 is connected with an external power supply and supplies power to the control chip 41 after being stabilized by the voltage stabilizing circuit 52. The regulator circuit 52 in this embodiment employs a 5V regulator circuit, and the regulator circuit 52 is a conventional electronic circuit and will not be described herein.
The output terminals can be connected to and control an ac or dc load, which in this embodiment is an ac load, including a live line inlet terminal 21, a live line outlet terminal 22 and a neutral line terminal 23.
The working principle of the embodiment is as follows:
when the relay contact 3 is adhered and the coil 12 is IN power failure, the IN1 of the control chip 41 is at low level, the relay contact 3 is always at voltage due to the adhesion of the relay contact 3, an isolation signal is input into the IN2 port of the control chip 41 through the optical coupler 42, the control chip 41 performs logic operation on the two electric signals, and the output end of the control chip 41 is at high level; the current is limited by a resistor R1, a time-delay capacitor C1 is charged for time delay and then the triode Q1 is conducted, the collector of the triode Q1 is connected with an alarm output terminal 43 at a low level, and the alarm output terminal 43 is used for being externally connected with an audible and visual alarm element or outputting a low level signal to be provided for a rear-stage trigger circuit to supply power to a load to execute forced power-off, so that the safety of equipment and personnel is ensured. And simultaneously, the utility model discloses still have the abnormal phenomenon of opening a way to relay contact 3 contact failure or coil and carry out the function of reporting to the police and exporting.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (3)
1. An electromagnetic relay contact or coil abnormity monitoring circuit comprises a control end and a controlled end, wherein the control end comprises an input terminal (11) and a coil (12) connected with the input terminal (11), and the coil (12) can generate an electromagnetic effect when the input terminal (11) is electrified so as to control the controlled end;
the controlled end comprises an output terminal and a relay contact (3) connected with the output terminal, the output terminal supplies power to a load, the relay contact (3) is controlled by a coil (12) to generate attraction or breaking action, and a loop of the output terminal supplying power to the load is switched on or off under the attraction or breaking action of the relay contact (3); the method is characterized in that:
still including the power and by control chip (41), opto-coupler (42) and the alarm output terminal (43) that the power was supplied power, control chip (41) link to each other with opto-coupler (42) to connect through this opto-coupler (42) and be used for acquireing the signal of telecommunication of this relay contact (3) on relay contact (3), control chip (41) link to each other with coil (12) simultaneously and be used for acquireing the signal of telecommunication of coil (12), just control chip (41) based on the signal of telecommunication between relay contact (3) and coil (12), output alarm signal through alarm output terminal (43).
2. An electromagnetic relay contact or coil abnormality monitoring circuit according to claim 1, characterized in that: the alarm control circuit is characterized in that a driving circuit is connected between the control chip (41) and the alarm output terminal (43), the driving circuit comprises a triode Q1, a resistor R1, a delay capacitor C1 and a resistor R2, one end of the resistor R1 is connected with the output end of the control chip (41), the other end of the resistor R1 is connected with the base of a triode Q1, one end of the delay capacitor C1 is connected with one end of a resistor R2, the emitter of the triode Q1, the other end of the delay capacitor C1 and the other end of the resistor R2 are grounded, and the collector of the triode Q1 is connected with the alarm output terminal (43).
3. An electromagnetic relay contact or coil abnormality monitoring circuit according to claim 1, characterized in that: the power supply comprises a power supply terminal (51) and a voltage stabilizing circuit (52), wherein the power supply terminal (51) is connected with an external power supply, supplies power by the external power supply, and supplies power to the control chip (41) after being stabilized by the voltage stabilizing circuit (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021573681.8U CN212303558U (en) | 2020-07-31 | 2020-07-31 | Electromagnetic relay contact or coil abnormity monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021573681.8U CN212303558U (en) | 2020-07-31 | 2020-07-31 | Electromagnetic relay contact or coil abnormity monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212303558U true CN212303558U (en) | 2021-01-05 |
Family
ID=73937731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021573681.8U Active CN212303558U (en) | 2020-07-31 | 2020-07-31 | Electromagnetic relay contact or coil abnormity monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212303558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922336A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信日立空调系统有限公司 | Frequency converter protection device, frequency converter and air conditioner |
| CN116088487A (en) * | 2023-04-11 | 2023-05-09 | 湖南长长电泵科技有限公司 | Emergency monitoring device for water pump controller |
-
2020
- 2020-07-31 CN CN202021573681.8U patent/CN212303558U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922336A (en) * | 2021-09-10 | 2022-01-11 | 青岛海信日立空调系统有限公司 | Frequency converter protection device, frequency converter and air conditioner |
| CN116088487A (en) * | 2023-04-11 | 2023-05-09 | 湖南长长电泵科技有限公司 | Emergency monitoring device for water pump controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212303558U (en) | Electromagnetic relay contact or coil abnormity monitoring circuit | |
| CN105896469B (en) | A kind of circuit protection device of automatic monitoring operation troubles | |
| CN112083350A (en) | Electromagnetic valve detection circuit, control panel, electric device and electromagnetic valve detection method | |
| CN110174886B (en) | Power supply monitoring and alarming method and system for DCS (distributed control System) driving control loop of nuclear power station | |
| CN115657643A (en) | Self-checking circuit and self-checking method of motor band-type brake control system and motor band-type brake system | |
| CN112180219B (en) | Cable circuit of industrial digital quantity output loop and implementation method | |
| CN105652191B (en) | A kind of safety return circuit condition monitoring system | |
| CN205622194U (en) | Protection circuit of single channel direct current magnet | |
| CN111799130A (en) | Electromagnetic relay contact or coil abnormity monitoring circuit | |
| CN101576106A (en) | Hydraulic valve control device and method for checking a hydraulic valve control device | |
| CN217135144U (en) | Power supply monitoring system | |
| CN215678607U (en) | Shunt release disconnection detection circuit | |
| CN213544754U (en) | Relay switch state monitoring circuit and air conditioner | |
| CN213715346U (en) | Multi-communication intelligent electric parameter monitoring device | |
| CN112114251A (en) | Relay switch state monitoring circuit and control method and air conditioner | |
| CN105762755A (en) | Protection circuit of single channel direct current electromagnet and control method | |
| CN210142986U (en) | Motor control system | |
| CN112255540A (en) | Adhesion fault detection circuit of low-side contactor | |
| CN207652018U (en) | A kind of breaker with short time duty device for under-voltage releasing equipment | |
| CN221509211U (en) | Edge control power distribution module | |
| CN207281948U (en) | The disconnecting device that safety alarm system triggering is kept | |
| KR20190104506A (en) | Power transfer control method using automatic power transfer control device with load short detection function | |
| CN112491010B (en) | Oil pump motor real-time monitoring circuit and monitoring method thereof | |
| CN219626553U (en) | Control device for preventing relay contact adhesion | |
| CN218510283U (en) | Electromagnetic valve driving circuit capable of monitoring action current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |