CN219697629U - Isolation control circuit - Google Patents
Isolation control circuit Download PDFInfo
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- CN219697629U CN219697629U CN202320232197.6U CN202320232197U CN219697629U CN 219697629 U CN219697629 U CN 219697629U CN 202320232197 U CN202320232197 U CN 202320232197U CN 219697629 U CN219697629 U CN 219697629U
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- 238000002955 isolation Methods 0.000 title claims abstract description 95
- 230000003750 conditioning effect Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 description 2
- 239000013642 negative control Substances 0.000 description 2
- 239000013641 positive control Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model discloses an isolation control circuit which comprises a first input signal interface, a second input signal interface, a first signal output interface, a second signal output interface and an isolation optocoupler, wherein signals at an input end are not distinguished into positive and negative ends through two light emitting diodes which are connected in parallel and reversely connected through the isolation optocoupler IC1, the isolation control of a power supply or signals at an output end can be realized, the use is more convenient, and the signal connection is not easy to make mistakes. And an output signal conditioning circuit is formed by the pass diodes D11, D13, D14 and D15 so as to realize that the output ends do not distinguish the connection relation of positive and negative polarities. Therefore, the input and output ends are not distinguished in connection relation of positive and negative polarities, the use is more convenient, and the signal connection is not easy to make mistakes.
Description
Technical Field
The utility model relates to the technical field of isolation control, in particular to an isolation control circuit.
Background
The isolation controller is often used in real life, and the working principle is that a small control signal is input to perform isolation control on a large current or high voltage signal. Increasing the safety of the circuit control. The isolation controller generally controls the high current or high voltage signal at the signal output terminal by inputting a small signal at the signal input terminal.
In the prior art, an input signal of a signal input end of an isolation control circuit is divided into positive and negative ends, the positive end can only be connected with the positive end of a control signal, the negative end can only be connected with the negative end of the control signal, and the control output of an output end power supply or signal can not be realized if the negative end is connected with the negative end of the control signal. The signal output end is also divided into a positive end and a negative end, and cannot be reversely connected, otherwise, the isolation control circuit cannot work normally, namely, the on or off control of the power supply or the signal of the output end cannot be realized, and the signal output end is easily connected by mistake when in use, so that the use is relatively troublesome.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present utility model is to propose an isolation control circuit.
To achieve the above object, an embodiment of the present utility model provides an isolation control circuit, including:
a first input signal interface;
a second input signal interface;
a first signal output interface;
a second signal output interface;
the isolation optocoupler comprises a first light emitting diode, a second light emitting diode and a phototriode, wherein the anode of the first light emitting diode is connected with a first input signal end of the isolation optocoupler, the cathode of the first light emitting diode is connected with a second input signal end of the isolation optocoupler, the anode of the second light emitting diode is connected with a second input signal end of the isolation optocoupler, the cathode of the second light emitting diode is connected with a first input signal end of the isolation optocoupler, the first input signal end of the isolation optocoupler is also connected with a first input signal interface, the second input signal end of the isolation optocoupler is also connected with a second input signal interface through a first resistor R2, the collector of the phototriode is connected with a first signal output end of the isolation optocoupler, the emitter of the phototriode is connected with a second signal output end of the isolation optocoupler, the first signal output end of the isolation optocoupler is also connected with a first signal output interface signal or a second signal output interface, and the second signal output end of the isolation optocoupler is also connected with a first signal output interface or a second signal interface.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes:
and one end of the second resistor R4 is connected with the first signal input end of the isolation optocoupler, and the other end of the second resistor R4 is connected with the second signal input end of the isolation optocoupler.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes:
and one end of the capacitor C1 is connected with the first signal input end of the isolation optocoupler, and the other end of the capacitor C1 is connected with the second signal input end of the isolation optocoupler.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes:
the anode of the first LED indicator lamp is connected with the first input signal end;
and one end of the third resistor R1 is connected with the cathode of the first LED indicator lamp, and the other end of the third resistor R1 is connected with the second input signal end.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes:
the anode of the second LED indicator lamp is connected with one end of the third resistor R1, and the cathode of the second LED indicator lamp is connected with the first input signal end.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes:
the power triode Q1, power triode Q1's base pass through fourth resistance R5 with the projecting pole of phototriode is connected, power triode Q1's collecting electrode with the collecting electrode of phototriode is connected, power triode Q1's projecting pole still pass through resistance R6 with power triode Q1's base is connected, power triode Q1's collecting electrode still with first signal output interface signal or second signal output interface signal connection, power triode Q1's projecting pole still with first signal output interface signal or second signal output interface signal connection.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes a signal conditioning circuit, and a collector and an emitter of the power triode Q1 are connected with the first signal output interface signal or the second signal output interface signal through the signal conditioning circuit; wherein the signal conditioning circuit comprises:
the cathode of the first diode D2 is connected with the collector of the power triode Q1 and the collector of the phototriode, and the anode of the first diode D2 is connected with the first signal output interface;
the cathode of the second diode D3 is connected with the collector of the power triode Q1 and the collector of the phototriode, and the anode of the second diode D3 is connected with the second signal output interface;
the anode of the third diode D4 is connected with the emitter of the power triode Q1, and the cathode of the third diode D4 is connected with the first signal output interface;
and the anode of the fourth diode D5 is connected with the emitter of the power triode Q1, and the cathode of the fourth diode D5 is connected with the second signal output interface.
Further, according to an embodiment of the present utility model, the isolation control circuit further includes:
and the cathode of the surge diode D1 is connected with the collector of the power triode Q1, and the anode of the surge diode D1 is connected with the emitter of the power triode Q1.
According to the isolation control circuit provided by the embodiment of the utility model, through the two light emitting diodes which are connected in parallel and reversely connected with the isolated optocoupler IC1, signals at the input end are not distinguished from positive and negative ends, the isolation control of a power supply or signals at the output end can be realized, the use is more convenient, and the signal connection is not easy to make mistakes. And an output signal conditioning circuit is formed by the pass diodes D11, D13, D14 and D15 so as to realize that the output ends do not distinguish the connection relation of positive and negative polarities. Therefore, the input and output ends are not distinguished in connection relation of positive and negative polarities, the use is more convenient, and the signal connection is not easy to make mistakes.
Drawings
Fig. 1 is a schematic diagram of an isolation control circuit according to an embodiment of the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to enable those skilled in the art to better understand the present utility model, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present utility model with reference to the accompanying drawings. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, an isolation control circuit according to an embodiment of the present utility model includes: the light source comprises a first input signal interface P1, a second input signal interface P2, a first signal output interface P3, a second signal output interface P4 and an isolation optocoupler IC1, wherein the isolation optocoupler IC1 comprises a first light emitting diode, a second light emitting diode and a phototriode, the anode of the first light emitting diode is connected with a first input signal end of the isolation optocoupler IC1, the cathode of the first light emitting diode is connected with a second input signal end of the isolation optocoupler IC1, the anode of the second light emitting diode is connected with a second input signal end of the isolation optocoupler IC1, the cathode of the second light emitting diode is connected with a first input signal end of the isolation optocoupler IC1, the first input signal end of the isolation optocoupler IC1 is also connected with the first input signal interface P1 through a first resistor R2, the cathode of the phototriode is connected with a first signal output end of the isolation optocoupler IC1, the emitter of the photocoupler IC1 is also connected with a second signal output end of the isolation optocoupler IC1 or the second signal interface P1, and the first signal output end of the photocoupler IC 4 is also connected with a second input signal end of the isolation optocoupler IC 1.
Specifically, as shown in fig. 1, the input signal may be introduced through the first input signal interface P1 and the second input signal interface P2, and the input signal may be a control signal. The input signal has positive and negative ends; in the first case, when the first input signal interface P1 is connected to the positive terminal and the negative terminal of the second input signal interface P2, the input signal current is input to the first input signal end of the isolated optocoupler IC1 through the first input signal interface P1, and passes through the first light emitting diode of the isolated optocoupler IC1, so that the second input signal end of the isolated optocoupler IC1 is output, and then flows to the second input signal interface P2 through the first resistor R2, the process causes the first light emitting diode to emit light, so that the phototransistor of the isolated optocoupler IC1 is turned on, and thus the power supply or the signal conduction between the first signal output interface P3 and the second signal output interface P4 can be controlled. In contrast, in the second case, when the first input signal interface P1 is connected to the negative terminal and the positive terminal of the second input signal interface P2, the current flowing through the input terminal of the isolation optocoupler IC1 is opposite, and at this time, the second light emitting diode of the isolation optocoupler IC1 emits light, so that the phototransistor of the isolation optocoupler IC1 is turned on, so that the conduction of the power supply or the signal between the first signal output interface P3 and the second signal output interface P4 can be controlled.
That is, by isolating the two light emitting diodes connected in parallel and reversely with the optocoupler IC1, the signals at the input end are not differentiated into the positive end and the negative end, the isolation control of the power supply or the signals at the output end can be realized, the use is more convenient, and the signal connection is not easy to make mistakes.
In one embodiment of the present utility model, the isolation control circuit further includes a second resistor R4, one end of the second resistor R4 is connected to the first signal input terminal of the isolation optocoupler IC1, and the other end of the second resistor R4 is connected to the second signal input terminal of the isolation optocoupler IC 1. And a voltage dividing circuit is formed by the second resistor R4 and the first resistor R2, so that a satisfactory power supply is provided for two ends of the signal input end of the isolated optocoupler IC 1.
In one embodiment of the utility model, the isolation control circuit further comprises a capacitor C1, wherein one end of the capacitor C1 is connected with the first signal input end of the isolation optocoupler IC1, and the other end of the capacitor C1 is connected with the second signal input end of the isolation optocoupler IC 1. The capacitor C1 is connected in parallel with two ends of the signal input end of the isolation optocoupler IC1, so that interference signals can be filtered, and pulse signals can be absorbed by matching with the second resistor R4.
The isolation control circuit further includes: the anode of the first LED indicator lamp is connected with the first input signal end; one end of the third resistor R1 is connected with the cathode of the first LED indicator lamp, and the other end of the third resistor R1 is connected with the second input signal end. The first LED indicator L1 may be turned on when the first input signal interface P1 is connected to the negative control signal terminal and the second input signal interface P2 is connected to the positive control signal terminal, so as to indicate the working state of the input terminal, and the third resistor R1 performs current limiting.
The isolation control circuit further includes: the anode of the second LED indicator lamp is connected with one end of the third resistor R1, and the cathode of the second LED indicator lamp is connected with the first input signal end. The second LED indicator L2 may be turned on when the first input signal interface P1 is connected to the positive control signal end and the second input signal interface P2 is connected to the negative control signal end, so as to indicate the working state of the input end, and the first resistor R2 performs current limiting.
The isolation control circuit further includes: the power triode Q1, power triode Q1's base pass through fourth resistance R5 with the projecting pole of phototriode is connected, power triode Q1's collecting electrode with the collecting electrode of phototriode is connected, power triode Q1's projecting pole still pass through resistance R6 with power triode Q1's base is connected, power triode Q1's collecting electrode still with first signal output interface P3 signal or second signal output interface P4 signal connection, power triode Q1's projecting pole still with first signal output interface P3 signal or second signal output interface P4 signal connection.
Specifically, because the power of the phototriode of the isolation optocoupler IC1 is smaller, when the first signal output interface P3 and the second signal output interface P4 are connected with a power supply, the phototriode of the isolation optocoupler IC1 cannot meet the requirement of high-current application, the power triode Q1 can be conducted or cut off under the action of the phototriode of the power triode Q1, when the first signal output interface P3 and the second signal output interface P4 are connected with the power supply or a signal, the phototriode of the isolation optocoupler IC1 is conducted under the action of an input signal, and the emitter of the phototriode of the isolation optocoupler IC1 is connected to the base of the power triode Q1 through a control signal, so that the power triode Q1 is conducted, and the conduction of the power supply or the signal between the first signal output interface P3 and the second signal output interface P4 can be controlled. The power triode Q1 is a Darlington triode for outputting control power, and R14 and R16 are resistors for triode working points.
The isolation control circuit further comprises a signal conditioning circuit, wherein a collector electrode and an emitter electrode of the power triode Q1 are in signal connection with the first signal output interface P3 or the second signal output interface P4 through the signal conditioning circuit; wherein the signal conditioning circuit comprises: the cathodes of the third diode D4 and the fourth diode D5 are connected with the collector of the power triode Q1 and the collector of the phototriode, and the anode of the first diode D2 is connected with the first signal output interface P3; the cathode of the second diode D3 is connected with the collector of the power triode Q1 and the collector of the phototriode, and the anode of the second diode D3 is connected with the second signal output interface P4; an anode of the third diode D4 is connected with the emitter of the power triode Q1, and a cathode of the third diode D4 is connected with the first signal output interface P3; an anode of the fourth diode D5 is connected to the emitter of the power triode Q1, and a cathode of the fourth diode D5 is connected to the second signal output interface P4.
Specifically, the diodes D11, D13, D14 and D15 form an output signal conditioning circuit so as to realize that the output ends do not distinguish between the positive and negative polarity connection lines. For example, when the first signal output interface P3 is connected to the positive end of the power supply or the signal, the second signal output interface P4 is connected to the negative end of the power supply or the signal, the current is output to the collector of the phototransistor of the isolated optocoupler IC1 through the first diode D2 and is output to the power transistor Q1 through the emitter, the power transistor Q1 is controlled to be turned on, and the current is output from the fourth diode D5. Conversely, when the first signal output interface P3 is connected to the negative terminal of the power supply or the signal, the second signal output interface P4 is connected to the positive terminal of the power supply or the signal, the current is output to the collector of the phototransistor of the isolated optocoupler IC1 through the second diode D3 and is output to the power triode Q1 through the emitter, the power triode Q1 is controlled to be turned on, and the current is output from the third diode D4. Therefore, the output end is free from distinguishing the connection relation of the positive polarity and the negative polarity, the use is more convenient, and the signal connection is not easy to make mistakes.
According to the isolation control circuit provided by the embodiment of the utility model, through the two light emitting diodes which are connected in parallel and reversely connected with the isolated optocoupler IC1, signals at the input end are not distinguished from positive and negative ends, the isolation control of a power supply or signals at the output end can be realized, the use is more convenient, and the signal connection is not easy to make mistakes. And an output signal conditioning circuit is formed by the pass diodes D11, D13, D14 and D15 so as to realize that the output ends do not distinguish the connection relation of positive and negative polarities. Therefore, the input and output ends are not distinguished in connection relation of positive and negative polarities, the use is more convenient, and the signal connection is not easy to make mistakes.
The isolation control circuit further includes: and the cathode of the surge diode D1 is connected with the collector of the power triode Q1, and the anode of the surge diode D1 is connected with the emitter of the power triode Q1. The surge diode D1 is arranged between the collector and the emitter of the power triode Q1, so that a surge signal can be absorbed, and the power triode Q1 is protected.
Although the present utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that the present utility model may be modified or equivalents substituted for some of the features thereof. All equivalent structures made by the content of the specification and the drawings of the utility model are directly or indirectly applied to other related technical fields, and are also within the scope of the utility model.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.
Claims (8)
1. An isolation control circuit, comprising:
a first input signal interface;
a second input signal interface;
a first signal output interface;
a second signal output interface;
the isolation optocoupler comprises a first light emitting diode, a second light emitting diode and a phototriode, wherein the anode of the first light emitting diode is connected with a first input signal end of the isolation optocoupler, the cathode of the first light emitting diode is connected with a second input signal end of the isolation optocoupler, the anode of the second light emitting diode is connected with a second input signal end of the isolation optocoupler, the cathode of the second light emitting diode is connected with a first input signal end of the isolation optocoupler, the first input signal end of the isolation optocoupler is also connected with a first input signal interface, the second input signal end of the isolation optocoupler is also connected with a second input signal interface through a first resistor (R2), the collector of the phototriode is connected with a first signal output end of the isolation optocoupler, the emitter of the phototriode is connected with a second signal output end of the isolation optocoupler, the first signal output end of the isolation optocoupler is also connected with a first signal output interface signal or a second signal output interface, and the second signal output interface is also connected with a second signal output interface.
2. The isolation control circuit of claim 1, further comprising:
and one end of the second resistor (R4) is connected with the first signal input end of the isolation optocoupler, and the other end of the second resistor (R4) is connected with the second signal input end of the isolation optocoupler.
3. The isolation control circuit of claim 1, further comprising:
and one end of the capacitor (C1) is connected with the first signal input end of the isolation optocoupler, and the other end of the capacitor (C1) is connected with the second signal input end of the isolation optocoupler.
4. The isolation control circuit of claim 1, further comprising:
the anode of the first LED indicator lamp is connected with the first input signal end;
and one end of the third resistor (R1) is connected with the cathode of the first LED indicator lamp, and the other end of the third resistor (R1) is connected with the second input signal end.
5. The isolation control circuit of claim 4, further comprising:
the anode of the second LED indicator lamp is connected with one end of the third resistor (R1), and the cathode of the second LED indicator lamp is connected with the first input signal end.
6. The isolation control circuit according to any one of claims 1 to 5, further comprising:
the power triode (Q1), the base of power triode (Q1) through fourth resistance (R5) with the projecting pole of phototriode is connected, the collecting electrode of power triode (Q1) with the collecting electrode of phototriode is connected, the projecting pole of power triode (Q1) still through resistance R6 with the base of power triode (Q1) is connected, the collecting electrode of power triode (Q1) still with first signal output interface signal or second signal output interface signal connection, the projecting pole of power triode (Q1) still with first signal output interface signal or second signal output interface signal connection.
7. The isolation control circuit of claim 6, further comprising a signal conditioning circuit through which a collector and an emitter of the power transistor (Q1) are in signal connection with the first signal output interface signal or the second signal output interface signal; wherein the signal conditioning circuit comprises:
the cathode of the first diode (D2) is connected with the collector of the power triode (Q1) and the collector of the phototriode, and the anode of the first diode (D2) is connected with the first signal output interface;
a cathode of the second diode (D3) is connected with a collector of the power triode (Q1) and a collector of the phototriode, and an anode of the second diode (D3) is connected with the second signal output interface;
a third diode (D4), wherein the anode of the third diode (D4) is connected with the emitter of the power triode (Q1), and the cathode of the third diode (D4) is connected with the first signal output interface;
and the anode of the fourth diode (D5) is connected with the emitter of the power triode (Q1), and the cathode of the fourth diode (D5) is connected with the second signal output interface.
8. The isolation control circuit of claim 7, further comprising:
the power triode comprises a surge diode (D1), wherein the cathode of the surge diode (D1) is connected with the collector of the power triode (Q1), and the anode of the surge diode (D1) is connected with the emitter of the power triode (Q1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320232197.6U CN219697629U (en) | 2023-02-03 | 2023-02-03 | Isolation control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320232197.6U CN219697629U (en) | 2023-02-03 | 2023-02-03 | Isolation control circuit |
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| CN219697629U true CN219697629U (en) | 2023-09-15 |
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| CN202320232197.6U Active CN219697629U (en) | 2023-02-03 | 2023-02-03 | Isolation control circuit |
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| CN (1) | CN219697629U (en) |
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