CN212485219U - Control circuit of contactor - Google Patents
Control circuit of contactor Download PDFInfo
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- CN212485219U CN212485219U CN202020739686.7U CN202020739686U CN212485219U CN 212485219 U CN212485219 U CN 212485219U CN 202020739686 U CN202020739686 U CN 202020739686U CN 212485219 U CN212485219 U CN 212485219U
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- control circuit
- circuit
- controller
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Abstract
The utility model relates to a switching circuit technical field discloses a can open automatically and stable contactor's control circuit, possesses: a pulse signal generator configured in the control circuit, the pulse signal generator being configured to output a pulse signal; the input end of the driving circuit is coupled with a signal output end of the pulse signal generator, and the driving circuit is used for receiving the pulse signal; one signal input end of the light control circuit is connected with the other signal output end of the pulse signal generator, and the other input end of the light control circuit is connected with the output end of the driving circuit; the input end of the time limit circuit is coupled with the output end of the light control circuit; when the control circuit is switched on after power failure, the light control circuit outputs a high level, and the high level is used for triggering the time limit circuit, so that the coils of the first contactor and the second contactor are attracted and self-locked.
Description
Technical Field
The utility model relates to a switching circuit technical field, more specifically say, relate to a control circuit of contactor.
Background
Contactors are relatively common devices in the field of controlling power, distribution and control circuitry. At present, when the control contactor is switched on or switched off, a button switch is usually used for controlling the state of the contactor, and the operation needs manual control, so that the control is inconvenient.
Therefore, a control circuit of a contactor capable of automatically controlling the on-off state of the contactor is provided in the prior art to solve the problem that the operation needs manual control in the prior art. However, when the existing control circuit outputs a control signal to complete the on/off of the circuit, the control circuit cannot be automatically turned on under the condition that the power supply of the circuit is restored after sudden power failure, so that the using effect of the control circuit is poor.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned circuit suddenly have a power failure then resume the power supply under the condition, the defect that control circuit can not be opened automatically provides the control circuit that can open automatically and stable contactor.
The utility model provides a technical scheme that its technical problem adopted is: a control circuit for a contactor is constructed, and the control circuit comprises:
a pulse signal generator configured in the control circuit, the pulse signal generator being configured to output a pulse signal;
a driving circuit, an input end of which is coupled to a signal output end of the pulse signal generator, the driving circuit being configured to receive the pulse signal;
a light control circuit, one signal input end of which is connected with the other signal output end of the pulse signal generator,
the other input end of the light control circuit is connected with the output end of the driving circuit;
a time-limiting circuit, the input end of which is coupled to the output end of the light control circuit;
when the control circuit is switched on after power failure, the light control circuit outputs a high level, and the high level is used for triggering the time-limiting circuit, so that coils of the first contactor and the second contactor are attracted and self-locked.
In some embodiments, the driving circuit comprises a controller, an input end of the controller is connected with an output end of the pulse signal generator;
and a signal output end of the controller is connected with a signal input end of the light control circuit.
In some embodiments, the light control circuit includes a time controller and a photoresistor, and a reset terminal of the time controller is connected to a signal output terminal of the controller;
one end of the photoresistor is connected with a signal output end of the controller, and the other end of the photoresistor is coupled to the trigger end of the time controller.
In some embodiments, the time limiting circuit includes a fifteenth resistor and a sixteenth resistor connected in parallel,
one end of the fifteenth resistor and one end of the sixteenth resistor are respectively connected with the output end of the time controller, and the other end of the fifteenth resistor and the other end of the sixteenth resistor are respectively connected with the voltage control end of the time controller.
In some embodiments, the relay further comprises a switch circuit, wherein an input end of the switch circuit is connected with an output end of the driving circuit, and an output end of the switch circuit is connected with a coil of the relay.
In some embodiments, the switching circuit includes a first transistor, a second transistor, and a third transistor,
the relay comprises a first relay, a second relay and a third relay,
the base electrode of the first triode is connected with a signal output end of the controller, and the collector electrode of the first triode is connected with one end of the coil of the first relay;
the base electrode of the second triode is connected with the other signal output end of the controller, and the collector electrode of the second triode is connected with one end of the coil of the second relay;
and the base electrode of the third triode is connected with the signal output end of the controller, and the collector electrode of the third triode is connected with one end of the coil of the third relay.
In some embodiments, the first transistor, the second transistor, and the third transistor are all NPN transistors.
The contactor control circuit of the present invention comprises a pulse signal generator for outputting a pulse signal, a driving circuit, a light control circuit and a time-limiting circuit, wherein the input terminal of the driving circuit is coupled to a signal output terminal of the pulse signal generator; one signal input end of the light control circuit is connected with the other signal output end of the pulse signal generator, and the other input end of the light control circuit is connected with the output end of the driving circuit; the input end of the time limit circuit is coupled with the output end of the light control circuit; when the control circuit is switched on after power failure, the light control circuit outputs a high level, and the high level is used for triggering the time limit circuit, so that the coils of the first contactor and the second contactor are attracted and self-locked. Compared with the prior art, the input pulse signal can be arranged and processed after power supply is recovered through the signal resetting function of the driving circuit, and the light control circuit is driven according to actual needs to push the contactor to be closed.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a partial circuit diagram of an embodiment of a control circuit of a contactor according to the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a partial circuit diagram of an embodiment of a control circuit of a contactor according to the present invention. As shown in fig. 1, in the first embodiment of the control circuit of the contactor of the present invention, the control circuit 100 of the contactor includes a pulse signal generator U101, a driving circuit 101, a switching circuit 102, a light control circuit 103, a time limit circuit 104, a relay (JS1-JS3), and a contactor (KM1-KM 2).
The pulse signal generator U101 is used to generate a pulse signal and set the time for the pulse signal to be output.
Specifically, the pulse signal generator U101 is disposed in the control circuit 100 of the contactor, the power input end of the pulse signal generator U101 is connected to the +12V power supply end, the input +12V power supply drives the pulse signal generator U101 to operate, so as to generate a pulse signal, and the pulse signal is input to the driving circuit 101.
The driving circuit 101 has the functions of resetting parameters and arranging the input pulse signals to output control signals.
An input end (corresponding to 14 pins) of the driving circuit 101 is connected to a signal output end (corresponding to 2 pins) of the pulse signal generator 101 through a first resistor R101, and a pulse signal output by the pulse signal generator 101 is input to the driving circuit 101 through the first resistor R101.
The resistance of the first resistor R101 is set to 3.3K-3.9K, and the resistance of the first resistor R101 can be selected according to the amplitude of the input pulse signal.
The driving circuit 101 processes the pulse signal to obtain a control signal, which is divided into four paths of output, and one path (corresponding to Q4) of output is output to the light control circuit 103; the other three paths (corresponding to Q1-Q3) are output to the switch circuit 102 respectively.
The light control circuit 103 is controlled by the time controller to turn on or off the circuit, and when the circuit is powered off suddenly and then powered back, the circuit can be turned on by itself through the control signal input by the driving circuit 101, and the normal operation is resumed.
Specifically, one signal input end of the light control circuit 103 is connected to another signal output end (corresponding to 3 pins) of the pulse signal generator U101, and is configured to receive the pulse signal output by the pulse signal generator U101; the other input terminal of the light control circuit 103 is connected to the output terminal of the driving circuit 101, and is used for receiving the control signal output by the driving circuit 101.
When the reset signal set by the driving circuit 101 finally arrives, the output end (corresponding to the Q4 end of the controller U102) of the driving circuit 101 outputs a high level to the reset end of the light control circuit 103 through the fourth diode D104, the second capacitor C102 and the third resistor R103, so that the light control circuit 103 (corresponding to the time controller U103) is reset to zero, and a control signal (i.e., a high level) is generated, and the light control circuit 103 outputs the control signal to the time limiting circuit 104.
The input end of the time-limiting circuit 104 is connected to the output end of the optical control circuit 103, and is configured to receive the control signal output by the optical control circuit 103.
When the control circuit is switched on after power failure, the light control circuit 101 outputs a high level for triggering the time-limited circuit 104, the output high level enables the fourth triode VT104 to be conducted for a short time, the coil of the relay JG is electrified and attracted, the normally open contact JG1 of the relay is closed, the coil of the JK1 is electrified and attracted, the coils of the first contactor KM1 and the second contactor KM2 are attracted and self-locked, and the control circuit works again.
Through the signal resetting function of the driving circuit 101, after the control circuit recovers power supply, the pulse signal generator U101 inputs pulse signals for arrangement processing, and the light control circuit 103 is driven according to actual needs to push the contactor (KM1-KM2) to be closed.
In some embodiments, in order to improve the performance of the circuit, the controller U102, the second capacitor C102 and the third resistor R103 may be disposed in the driving circuit 101.
The controller U102 is composed of a counter and a decoder, and the pulse signals are distributed by decoding output, and the whole output timing sequence is that high levels synchronous with the clock sequentially appear in O0, O1, O2, … and O9, and the width is equal to the clock period.
It has a signal input terminal (corresponding to CP terminal) and a signal output terminal (corresponding to Q1 terminal, Q2 terminal, Q3 terminal and Q4 terminal).
Specifically, the input end (corresponding to the CP end) of the controller U102 is connected to the output end (corresponding to the 2-pin) of the pulse signal generator U101, and is configured to receive the pulse signal output by the pulse signal generator U101, reset and arrange the signal, and output a control signal (high level or low level).
A signal output terminal (corresponding to the terminal Q4) of the controller U102 is connected to a signal input terminal of the light control circuit 103, and inputs a control signal to the light control circuit 103.
In some embodiments, to improve the performance of the circuit, a timer U103 and a photo resistor RG may be disposed in the light control circuit 103.
The time controller U103 has the functions of generating time reference and finishing various timing and delay.
The light sensitive resistor RG is used for sensing ambient light and inputting the sensed sensing signal to the controller U103.
Specifically, the reset terminal (corresponding to 4 pins) of the timer U103 is connected to a signal output terminal (corresponding to the Q4 terminal) of the controller U102.
Further, one end of the photo resistor RG is connected to a signal output terminal (corresponding to the terminal Q4) of the controller U102, and the other end of the photo resistor RG is coupled to the trigger terminal (corresponding to the terminal 2) of the time controller U103.
When the reset signal comes and the luminosity signal input by the photoresistor RG is at night, the Q4 end of the controller U102 outputs a high level, and the high level is supplied to the reset end through the fourth diode D104, the second capacitor C102 and the third resistor R103, so that the time controller U103 is reset to zero, and preparation is made for the control circuit to trigger again.
In some embodiments, the time-limiting circuit 104 includes a fifteenth resistor R115 and a sixteenth resistor R116 connected in parallel.
A seventh capacitor C107 is disposed between the fifteenth resistor R115 and the sixteenth resistor R116, and one end of the fifteenth resistor R115 is connected to the output end (corresponding to the 3 pins) of the time controller U103 through a fourteenth resistor R114.
One end of the sixteenth resistor R116 and one end of the seventh capacitor C107 are connected to a base of the fourth transistor VT104, an emitter of the fourth transistor VT104 is connected to a voltage control end (corresponding to 5 pins) of the time controller U103, and a collector of the fourth transistor VT104 is connected to a power input end (corresponding to 8 pins) of the time controller U103 through a coil of the relay JG.
The control signal (high level) outputted by the real-time controller U103 is inputted to the base of the fourth triode VT104 through the fifteenth resistor R115 and the sixteenth resistor R116, and the high level is applied to the collector of the fourth triode VT104, so that the fourth triode VT104 is turned on, the coils of the first contactor KM1 and the second contactor KM2 are powered on, and the normally open contacts (corresponding to KM1 and KM2) are attracted and self-locked.
In some embodiments, to improve the performance of the circuit, a switching circuit 102 may be provided in the circuit, which has the function of a switch.
Specifically, the input terminal of the switch circuit 102 is connected to the output terminal of the drive circuit 101, and the output terminal of the switch circuit 102 is connected to the coil of the relay (corresponding to JS1-JS 3).
In some embodiments, the switching circuit 102 includes a first transistor VT101, a second transistor VT102, and a third transistor VT103, wherein the first transistor VT101, the second transistor VT102, and the third transistor VT103 are all NPN transistors.
The relays include a first relay JS1, a second relay JS2, and a third relay JS 3.
Specifically, the base of the first transistor VT101 is connected to a signal output end (corresponding to 2 pins) of the controller U102 through the series-connected fourth resistor R104 and the first diode D101, and the collector of the first transistor VT101 is connected to one end of the coil of the first relay JS 1.
The base of the second transistor VT102 is connected to another signal output terminal (corresponding to 4 pins) of the controller U102 through a fifth resistor R105 and a second diode D102 connected in series, and the collector of the second transistor VT102 is connected to one end of the coil of the second relay JS 2.
The base of the third transistor VT103 is connected to a further signal output terminal (corresponding to pin 7) of the controller U102 through a sixth resistor R106 and a third diode D103 connected in series, and the collector of the third transistor VT103 is connected to one end of the coil of the third relay JS 3.
For example, when a signal set at 1 o' clock at midnight comes, a signal output end (corresponding to Q2) of the controller U102 outputs a high level, the high level is input into the second triode VT102 to be conducted after passing through the second diode D102 and the fifth resistor R105, so that a coil of the second relay JS2 is energized, the JS2-1 is normally closed and disconnected, the coil of the first contactor KM1 is de-energized, self-locking is released, a contact of the main circuit is disconnected, and half of the street lamps are extinguished.
When the signal of 7 th point comes early, the signal output end (corresponding to Q3) of the controller U102 sends out high level, the coil of the third relay JS3 is electrified, the JS3-1 normally closed contact is disconnected, the second contactor KM2 is powered off, and the self-locking is released from powering off.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (7)
1. A control circuit of a contactor is characterized by comprising:
a pulse signal generator configured in the control circuit, the pulse signal generator being configured to output a pulse signal;
a driving circuit, an input end of which is coupled to a signal output end of the pulse signal generator, the driving circuit being configured to receive the pulse signal;
a light control circuit, one signal input end of which is connected with the other signal output end of the pulse signal generator,
the other input end of the light control circuit is connected with the output end of the driving circuit;
a time-limiting circuit, the input end of which is coupled to the output end of the light control circuit;
when the control circuit is switched on after power failure, the light control circuit outputs a high level, and the high level is used for triggering the time-limiting circuit, so that coils of the first contactor and the second contactor are attracted and self-locked.
2. The control circuit of a contactor according to claim 1,
the driving circuit comprises a controller, and the input end of the controller is connected with the output end of the pulse signal generator;
and a signal output end of the controller is connected with a signal input end of the light control circuit.
3. The control circuit of the contactor according to claim 2,
the light control circuit comprises a time controller and a photoresistor, and the reset end of the time controller is connected with a signal output end of the controller;
one end of the photoresistor is connected with a signal output end of the controller, and the other end of the photoresistor is coupled to the trigger end of the time controller.
4. The control circuit of the contactor according to claim 3,
the time limit circuit comprises a fifteenth resistor and a sixteenth resistor which are connected in parallel,
one end of the fifteenth resistor and one end of the sixteenth resistor are respectively connected with the output end of the time controller, and the other end of the fifteenth resistor and the other end of the sixteenth resistor are respectively connected with the voltage control end of the time controller.
5. The control circuit of the contactor according to claim 2,
the input end of the switch circuit is connected with the output end of the driving circuit, and the output end of the switch circuit is connected with the coil of the relay.
6. The control circuit of the contactor according to claim 5,
the switch circuit comprises a first triode, a second triode and a third triode,
the relay comprises a first relay, a second relay and a third relay,
the base electrode of the first triode is connected with a signal output end of the controller, and the collector electrode of the first triode is connected with one end of the coil of the first relay;
the base electrode of the second triode is connected with the other signal output end of the controller, and the collector electrode of the second triode is connected with one end of the coil of the second relay;
and the base electrode of the third triode is connected with the signal output end of the controller, and the collector electrode of the third triode is connected with one end of the coil of the third relay.
7. The control circuit of the contactor according to claim 6,
the first triode, the second triode and the third triode are all NPN type triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020739686.7U CN212485219U (en) | 2020-05-08 | 2020-05-08 | Control circuit of contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020739686.7U CN212485219U (en) | 2020-05-08 | 2020-05-08 | Control circuit of contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212485219U true CN212485219U (en) | 2021-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020739686.7U Active CN212485219U (en) | 2020-05-08 | 2020-05-08 | Control circuit of contactor |
Country Status (1)
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|---|---|
| CN (1) | CN212485219U (en) |
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2020
- 2020-05-08 CN CN202020739686.7U patent/CN212485219U/en active Active
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