CN212302234U - Control circuit - Google Patents
Control circuit Download PDFInfo
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- CN212302234U CN212302234U CN202021637423.1U CN202021637423U CN212302234U CN 212302234 U CN212302234 U CN 212302234U CN 202021637423 U CN202021637423 U CN 202021637423U CN 212302234 U CN212302234 U CN 212302234U
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Abstract
The application discloses control circuit includes: the photoelectric coupler comprises a relay, a processing unit and a photoelectric coupler, wherein a first access end of the relay is connected with a mode control signal, and a first output end of the relay is connected with a first power supply; a second access end of the relay is connected with an optocoupler control signal, a second output end of the relay is connected with one end of the processing unit, and the other end of the processing unit is connected with the optocoupler through a third output end of the relay; the problem that the conduction condition of the determined optical coupler can not be changed before circuit design is solved, and circuit control is more flexible and reliable.
Description
Technical Field
The application relates to the technical field of control circuits, in particular to a control circuit.
Background
At present, because the opto-coupler control signal has only two kinds of states, both high level and low level to the opto-coupler has only two kinds of states, both opto-couplers switch on and the opto-coupler closes. In the process of implementing the invention, the inventor finds that designing a control circuit, in the prior art, it is determined in advance whether the high level of a control signal enables an optical coupler to be conducted or the low level enables the optical coupler to be conducted. If once set up the control mode, just can't change, can't the nimble mode of selecting the control opto-coupler to switch on, do not have the universality.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems that a control mode is set in advance in a control circuit and the mode for controlling the conduction of an optocoupler cannot be flexibly selected, the application provides a control circuit and a mode control method.
According to an aspect of an embodiment of the present application, there is provided a control circuit, including: the photoelectric coupler comprises a relay, a processing unit and a photoelectric coupler, wherein a first access end of the relay is connected with a mode control signal, and a first output end of the relay is connected with a first power supply;
the second incoming end of the relay is connected with an optocoupler control signal, the second output end of the relay is connected with one end of the processing unit, and the other end of the processing unit is connected with the optocoupler through the third output end of the relay.
Furthermore, the control circuit also comprises a first resistor and a first capacitor;
one end of the first resistor is connected with an optocoupler control signal, the other end of the first resistor is connected with one end of the first capacitor and the relay at the same time, and the other end of the first capacitor is grounded.
Furthermore, an electromagnet is arranged between the first access end and the first power supply.
Further, the relay further includes: a first dual-contact switch and a second dual-contact switch;
the first double-contact switch is used for connecting the first resistor and the processing unit, and the second double-contact switch is used for connecting the processing unit and the photoelectric coupler.
Further, the processing unit includes: a first processing subunit and a second processing subunit;
wherein the first processing subunit includes: PNP type triode, second resistance, third resistance and second power, the second processing subunit includes: the NPN type triode, the fourth resistor and the third power supply.
Further, when the voltage difference between the two ends of the electromagnet is 0, the other end of the first resistor is simultaneously connected with the base of the PNP type triode and one end of the third resistor through the first double-contact switch, and the emitter of the PNP type triode is simultaneously connected with the other end of the third resistor and the second power supply;
when the voltage difference between the emitter of the PNP type triode and the base of the PNP type triode is determined to be 0 according to the optical coupling control signal, the collector of the PNP type triode is grounded through the second resistor, the collector of the PNP type triode is also connected with the second double-contact switch through the first lead, is connected with the photoelectric coupler through the second double-contact switch, and outputs a control signal of a first level type through the photoelectric coupler.
Further, when the voltage difference between the two ends of the electromagnet is 0, the other end of the first resistor is simultaneously connected with the base of the PNP type triode and one end of the third resistor through the first double-contact switch, and the emitter of the PNP type triode and the other end of the third resistor are simultaneously connected with the second power supply;
when the voltage difference between the emitter of the PNP type triode and the base of the PNP type triode is determined to be not 0 according to the optical coupling control signal, the collector of the PNP type triode is connected with the second power supply through the emitter, the collector of the PNP type triode is also connected with the second double-contact switch through the first lead, is connected with the photoelectric coupler through the second double-contact switch, and outputs a control signal of a second level type through the photoelectric coupler.
Further, when the voltage difference between the two ends of the electromagnet is not 0, the other end of the first resistor is simultaneously connected with one end of the fourth resistor and the base of the NPN-type triode through the first dual-contact switch, the other end of the fourth resistor is connected with the emitter of the NPN-type triode, and the collector of the NPN-type triode is connected with the third power supply;
when the voltage difference between the emitter of the NPN type triode and the base of the NPN type triode is determined to be 0 according to the optical coupling control signal, the emitter of the NPN type triode is grounded, the emitter of the NPN type triode is connected with the second double-contact switch through a second lead and is connected with the photoelectric coupler through the second double-contact switch, and the photoelectric coupler outputs a control signal of a first level type.
Further, when the voltage difference between the two ends of the electromagnet is not 0, the other end of the first resistor is simultaneously connected with one end of the fourth resistor and the base of the NPN-type triode through the first dual-contact switch, the other end of the fourth resistor is connected with the emitter of the NPN-type triode, and the collector of the NPN-type triode is connected with the third power supply;
when the voltage difference between the emitter of the NPN type triode and the base of the NPN type triode is determined to be not 0 according to the optical coupling control signal, the emitter of the NPN type triode is connected with the third power supply through the collector, the emitter of the NPN type triode is also connected with the second double-contact switch through a second lead and is connected with the photoelectric coupler through the second double-contact switch, and a second level type control signal is output through the photoelectric coupler.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a control circuit according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of a control circuit according to an embodiment of the present application, and as shown in fig. 1, the control circuit includes: the system comprises a relay 100, a processing unit and a photoelectric coupler 400, wherein a first access end of the relay is connected with a first power supply VDD1 through the relay, a second access end of the relay is connected with one end of the processing unit through the relay, and the other end of the processing unit is connected with the photoelectric coupler through the relay;
the relay accesses the optical coupling control signal into the photoelectric coupler through the processing unit according to the transmission mode, and the photoelectric coupler determines the level type of the output signal according to the conduction result of the optical coupling control signal in the processing unit.
Fig. 1 is a schematic structural diagram of a control circuit according to an embodiment of the present application, and as shown in fig. 1, the control circuit includes: the relay comprises a relay 100, a processing unit and a photoelectric coupler 400, wherein a first access end of the relay 100 is connected with a mode control signal, and a first output end of the relay 100 is connected with a first power supply VDD 1; the second incoming end of the relay 100 is connected with the optocoupler control signal, the second output end of the relay 100 is connected with one end of the processing unit, and the other end of the processing unit is connected with the optocoupler 400 through the third output end of the relay 100.
The relay is used for connecting the optical coupling control signal into the photoelectric coupler through the processing unit according to the transmission mode, and the photoelectric coupler is used for determining the level type of the output signal according to the conduction result of the optical coupling control signal in the processing unit.
As shown in fig. 1, the control circuit in this embodiment further includes a first resistor R1, a first capacitor C1; one end of the first resistor is connected with an optical coupling control signal, the other end of the first resistor R1 is simultaneously connected with one end of the first capacitor C1 and the relay, and the other end of the first capacitor C1 is grounded. The optical coupling control signal is filtered through a first resistor R1 and a first capacitor C1.
As shown in fig. 1, an electromagnet YA is arranged between the first access end and the first output end, and the relay further includes: a first double-contact switch K1 and a second double-contact switch K2, wherein the first double-contact switch K1 is used for connecting the first resistor R1 and the processing unit, and the second double-contact switch K2 is used for connecting the processing unit and the photocoupler 400.
As shown in fig. 1, the processing unit includes a first processing subunit and a second processing subunit. Wherein the first processing subunit includes: PNP type triode 200, second resistance R2, third resistance R3 and second power VCC2, the second processing subunit includes: an NPN transistor 300, a fourth resistor R4, and a third power source VCC 3.
In an embodiment of the present application, when the mode control signal is a high level signal, the voltage amplitude is equal to the voltage of the first power supply VDD1, the voltage difference between the two ends of the electromagnet YA is 0 (i.e. the voltage difference between the first input terminal and the first output terminal is 0), the electromagnet YA does not operate, and the contacts of the first dual-contact switch K1 and the second dual-contact switch K2 are both connected to the point B.
Specifically, the other end of the first resistor R1 is simultaneously connected to the base of the PNP transistor 200 and one end of the third resistor through the first dual-contact switch K1, and the emitter of the PNP transistor 200 is simultaneously connected to the other end of the third resistor R3 and the second power source VCC 2;
then, the judgment is carried out according to the accessed optical coupling control signal, when the optical coupling control signal is a high level signal, and the voltage difference between the emitter of the PNP type triode 200 and the base of the PNP type triode 200 is 0, the collector of the PNP type triode 200 is grounded through a second resistor R2, the collector of the PNP type triode 200 is also connected with a second double-contact switch K2 through a first lead, and is connected with a photoelectric coupler 400 through a second double-contact switch K2, and the control signal of the first level type is output through the photoelectric coupler 400.
It should be noted that the second input end of the photoelectric coupler 400 is grounded through the fifth resistor, and the voltage is 0, so that there is no voltage difference between two ends of the light emitting diode inside the photoelectric coupler 400, and at this time, the light emitting diode cannot be turned on, so that the output control signal is of the first level type, that is, is a high level control signal.
In another embodiment of the present application, when the mode control signal is a high level signal, the voltage amplitude is equal to the voltage of the first power source VDD1, the voltage difference between the two ends of the electromagnet YA is 0 (i.e. the voltage difference between the first input terminal and the first output terminal is 0), the electromagnet YA does not operate, and the contacts of the first dual-contact switch K1 and the second dual-contact switch K2 are both connected to the point B.
Specifically, the other end of the first resistor R1 is simultaneously connected to the base of the PNP type triode and one end of the third resistor through the first two-contact switch K1, and the emitter of the PNP type triode is simultaneously connected to the other end of the third resistor R3 and the second power source VCC 2;
then, the judgment is carried out according to the accessed optical coupling control signal, when the optical coupling control signal is a low level signal, the voltage difference between the emitter of the PNP type triode 200 and the base of the PNP type triode 200 is not 0, the collector of the PNP type triode 200 is connected with a second power supply VCC2 through the emitter, the collector of the PNP type triode is also connected with a second double-contact switch K2 through a first lead, and is connected with a photoelectric coupler 400 through a second double-contact switch K2, and a control signal of a second level type is output through the photoelectric coupler 400.
It should be noted that, the voltage at the first input end of the photocoupler 400 is the power supply voltage of the circuit, and the voltage at the second input end of the photocoupler 400 is 0, so that there is a voltage difference between two ends of the light emitting diode inside the photocoupler 400, which can be turned on at this time, so that the output control signal is of the second level type, that is, a low level control signal.
In another embodiment of the present application, when the mode control signal is a low level signal, the voltage amplitude is 0, the voltage difference between the two ends of the electromagnet YA is not 0 (i.e. the voltage difference between the first input end and the first output end is not 0), and at this time, the electromagnet YA attracts and connects the two dual-contact switches to the point a.
Specifically, the other end of the first resistor R1 is simultaneously connected to one end of the fourth resistor R4 and the base of the NPN transistor 300 through the first dual-contact switch K1, the other end of the fourth resistor R4 is connected to the emitter of the NPN transistor 300, and the collector of the NPN transistor 300 is connected to the third power source VCC 3.
And then, judging according to the accessed optical coupling control signal, when the optical coupling control signal is a high-level signal and the voltage difference between the emitter of the NPN type triode 300 and the base of the NPN type triode 300 is 0, grounding the emitter of the NPN type triode 300, connecting the emitter of the NPN type triode 300 with the second double-contact K2 switch through the second wire, and connecting with the photoelectric coupler 400 through the second double-contact switch K2, and outputting the control signal of the first level type through the photoelectric coupler 400.
Since the terminal 2 is grounded through the resistor and the voltage is also 0, there is no voltage difference between both terminals of the light emitting diode and the light emitting diode cannot be turned on, so that the control signal is output as a high level control signal.
In another embodiment of the present application, when the mode control signal is a low level signal, the voltage amplitude is 0, the voltage difference between the two ends of the electromagnet YA is not 0 (i.e. the voltage difference between the first input end and the first output end is not 0), and at this time, the electromagnet YA attracts and connects the two dual-contact switches to the point a.
Specifically, the other end of the first resistor R1 is simultaneously connected to one end of the fourth resistor R4 and the base of the NPN transistor 300 through the first dual-contact switch K1, the other end of the fourth resistor R4 is connected to the emitter of the NPN transistor 300, and the collector of the NPN transistor 300 is connected to the third power source VCC 3.
When it is determined that the voltage difference between the emitter of the NPN transistor 300 and the base of the NPN transistor 300 is not 0 according to the optocoupler control signal, the emitter of the NPN transistor 300 is connected to the third power source VCC3 through the collector, the emitter of the NPN transistor 300 is further connected to the second double-contact switch K2 through the second wire and connected to the optocoupler 400 through the second double-contact switch K2, and the second level type control signal is output through the optocoupler 400.
It should be noted that the voltage at the first access end of the photoelectric coupler 400 is a power supply voltage of the circuit, the voltage at the first access end of the photoelectric coupler 400 is 0, a voltage difference is generated at two ends of the light emitting diode, and at this time, the light emitting diode can be turned on, and the output control signal is connected to the PGND through a triode inside the photoelectric coupler 400 and is output as a control signal of a second level type, that is, a low level control signal.
It is further noted that, herein, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A control circuit, comprising: the photoelectric coupler comprises a relay, a processing unit and a photoelectric coupler, wherein a first access end of the relay is connected with a mode control signal, and a first output end of the relay is connected with a first power supply;
the second incoming end of the relay is connected with an optocoupler control signal, the second output end of the relay is connected with one end of the processing unit, and the other end of the processing unit is connected with the optocoupler through the third output end of the relay.
2. The control circuit of claim 1, further comprising a first resistor, a first capacitor;
one end of the first resistor is connected with an optocoupler control signal, the other end of the first resistor is connected with one end of the first capacitor and the relay at the same time, and the other end of the first capacitor is grounded.
3. The control circuit of claim 2, wherein an electromagnet is disposed between the first input and the first power source.
4. The control circuit of claim 3, wherein the relay further comprises: a first dual-contact switch and a second dual-contact switch;
the first double-contact switch is used for connecting the first resistor and the processing unit, and the second double-contact switch is used for connecting the processing unit and the photoelectric coupler.
5. The control circuit of claim 4, wherein the processing unit comprises: a first processing subunit and a second processing subunit;
wherein the first processing subunit includes: PNP type triode, second resistance, third resistance and second power, the second processing subunit includes: the NPN type triode, the fourth resistor and the third power supply.
6. The control circuit according to claim 5, wherein when the voltage difference between the two ends of the electromagnet is 0, the other end of the first resistor is simultaneously connected to the base of the PNP type triode and one end of the third resistor through the first dual-contact switch, and the emitter of the PNP type triode is simultaneously connected to the other end of the third resistor and the second power supply;
when the voltage difference between the emitter of the PNP type triode and the base of the PNP type triode is determined to be 0 according to the optical coupling control signal, the collector of the PNP type triode is grounded through the second resistor, the collector of the PNP type triode is also connected with the second double-contact switch through the first lead, is connected with the photoelectric coupler through the second double-contact switch, and outputs a control signal of a first level type through the photoelectric coupler.
7. The control circuit according to claim 5, wherein when the voltage difference between the two ends of the electromagnet is 0, the other end of the first resistor is simultaneously connected to the base of the PNP type triode and one end of the third resistor through the first dual-contact switch, and the emitter of the PNP type triode and the other end of the third resistor are simultaneously connected to the second power supply;
when the voltage difference between the emitter of the PNP type triode and the base of the PNP type triode is determined to be not 0 according to the optical coupling control signal, the collector of the PNP type triode is connected with the second power supply through the emitter, the collector of the PNP type triode is also connected with the second double-contact switch through the first lead, is connected with the photoelectric coupler through the second double-contact switch, and outputs a control signal of a second level type through the photoelectric coupler.
8. The control circuit according to claim 5, wherein when the voltage difference between the two ends of the electromagnet is not 0, the other end of the first resistor is simultaneously connected to one end of the fourth resistor and the base of the NPN transistor through the first dual-contact switch, the other end of the fourth resistor is connected to the emitter of the NPN transistor, and the collector of the NPN transistor is connected to the third power supply;
when the voltage difference between the emitter of the NPN type triode and the base of the NPN type triode is determined to be 0 according to the optical coupling control signal, the emitter of the NPN type triode is grounded, the emitter of the NPN type triode is connected with the second double-contact switch through a second lead and is connected with the photoelectric coupler through the second double-contact switch, and the photoelectric coupler outputs a control signal of a first level type.
9. The control circuit according to claim 5, wherein when the voltage difference between the two ends of the electromagnet is not 0, the other end of the first resistor is simultaneously connected to one end of the fourth resistor and the base of the NPN transistor through the first dual-contact switch, the other end of the fourth resistor is connected to the emitter of the NPN transistor, and the collector of the NPN transistor is connected to the third power supply;
when the voltage difference between the emitter of the NPN type triode and the base of the NPN type triode is determined to be not 0 according to the optical coupling control signal, the emitter of the NPN type triode is connected with the third power supply through the collector, the emitter of the NPN type triode is also connected with the second double-contact switch through a second lead and is connected with the photoelectric coupler through the second double-contact switch, and a second level type control signal is output through the photoelectric coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021637423.1U CN212302234U (en) | 2020-08-07 | 2020-08-07 | Control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021637423.1U CN212302234U (en) | 2020-08-07 | 2020-08-07 | Control circuit |
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| CN212302234U true CN212302234U (en) | 2021-01-05 |
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| CN202021637423.1U Active CN212302234U (en) | 2020-08-07 | 2020-08-07 | Control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746381A (en) * | 2021-08-30 | 2021-12-03 | 珠海格力电器股份有限公司 | Brake control device and method of motor and motor |
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2020
- 2020-08-07 CN CN202021637423.1U patent/CN212302234U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746381A (en) * | 2021-08-30 | 2021-12-03 | 珠海格力电器股份有限公司 | Brake control device and method of motor and motor |
| CN113746381B (en) * | 2021-08-30 | 2023-11-03 | 珠海格力电器股份有限公司 | Braking control device and method of motor and motor |
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