CN219812143U - Control circuit and intelligent solid-state relay adopting same - Google Patents
Control circuit and intelligent solid-state relay adopting same Download PDFInfo
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- CN219812143U CN219812143U CN202321217295.9U CN202321217295U CN219812143U CN 219812143 U CN219812143 U CN 219812143U CN 202321217295 U CN202321217295 U CN 202321217295U CN 219812143 U CN219812143 U CN 219812143U
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- 230000005540 biological transmission Effects 0.000 claims abstract description 114
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 20
- 230000005669 field effect Effects 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 239000010703 silicon Substances 0.000 claims abstract description 13
- 230000008054 signal transmission Effects 0.000 claims abstract description 12
- 238000002955 isolation Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 2
- 230000003321 amplification Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
The utility model provides a control circuit and an intelligent solid-state relay adopting the control circuit, comprising: the control unit is used for sending out control signals and receiving load signals, the controllable silicon driving unit is connected with the control end of the main control unit and used for transmitting the control signals, the load signal transmission unit is connected with the input end of the main control unit and used for transmitting the load signals, and the output end of the controllable silicon driving unit and the input end of the load signal transmission unit are connected with a load; the beneficial effects of the utility model are as follows: the field effect transistor in the first transmission sub-module plays a role in power amplification, the transformer in the second transmission sub-module plays a role in safety isolation, the bidirectional thyristor in the second transmission module can drive a load, the operational amplifier in the third transmission module can amplify a load signal, and the optical coupler in the fourth transmission module can well isolate an input signal and an output signal.
Description
Technical Field
The utility model relates to the technical field of solid-state relay control circuits, in particular to a control circuit and an intelligent solid-state relay adopting the control circuit.
Background
The solid-state relay is a non-contact switch composed of a microelectronic circuit, a discrete electronic device and a power electronic power device, the isolation between a control end and a load end is realized by an isolation device, the input end of the solid-state relay is directly driven by a tiny control signal to realize the heavy current load, the solid-state relay is a novel non-contact switch device which is entirely composed of solid-state electronic elements, the purpose of non-contact non-spark connection and disconnection of the circuit can be realized by utilizing the switching characteristics of the electronic elements, and therefore, the solid-state relay is also called a non-contact switch, but the existing solid-state relay cannot realize the short circuit, the open circuit detection and the short circuit protection of the load during the use, and cannot realize the stepless regulation and control of the power, and an analog interface is not arranged on the existing solid-state relay, so that the closed loop control and the informatization of a system cannot be conveniently realized.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present utility model is to provide a control circuit and an intelligent solid-state relay employing the control circuit, which are used for solving the problems that the short circuit, the open circuit detection and the short circuit protection of the load cannot be realized in the prior art.
To achieve the above and other related objects, the present utility model provides a control circuit comprising: the control unit is used for sending out control signals and receiving load signals, the controllable silicon driving unit is connected with the control end of the main control unit and used for transmitting the control signals, the load signal transmission unit is connected with the input end of the main control unit and used for transmitting the load signals, and the output end of the controllable silicon driving unit and the input end of the load signal transmission unit are connected with a load;
the controllable silicon driving unit comprises a first transmission module for transmitting control signals and a second transmission module for driving loads, wherein the input end of the first transmission module is connected with the control end of the main control unit, the output end of the first transmission module is connected with the input end of the second transmission module, the output end of the second transmission module is connected with the loads, the load signal transmission module comprises a third transmission module for amplifying the load signals and a fourth transmission module for playing an isolation role, the output end of the third transmission module is connected with the input end of the main control unit, the input end of the third transmission module is connected with the input end of the fourth transmission module, and the input end of the fourth transmission module is connected with the loads.
In an embodiment of the utility model, the main control unit includes a main control chip, a control end of the main control chip is connected with an input end of the thyristor driving unit, an input end of the main control chip is connected with an output end of the load signal transmission unit, and an analog interface and a communication interface are further arranged on the main control chip.
In an embodiment of the present utility model, the first transmission module includes a first transmission sub-module for amplifying power and a second transmission sub-module having an isolation function, an input end of the first transmission sub-module is connected to the control end of the main control unit, an output end of the first transmission sub-module is connected to an input end of the second transmission sub-module, and an output end of the second transmission sub-module is connected to an input end of the second transmission module.
In an embodiment of the utility model, the first transmission submodule includes a field effect transistor and a first capacitor, a gate of the field effect transistor is connected with one end of the first capacitor, the other end of the first capacitor is connected with a control end of the main control unit, and a drain of the field effect transistor is connected with an input end of the second transmission submodule.
In an embodiment of the utility model, the second transmission submodule includes a transformer and a second diode, a second input end of the transformer is connected with an output end of the first transmission submodule, a first output end of the transformer is connected with a positive electrode of the second diode, and a negative electrode of the second diode and a second output end of the transformer are both connected with an input end of the second transmission submodule.
In an embodiment of the utility model, the second transmission module includes a bidirectional thyristor, a control end of the bidirectional thyristor is connected with an output end of the second transmission sub-module, a second pin of the bidirectional thyristor is connected with the output end of the second transmission sub-module through a third resistor, and the second pin of the bidirectional thyristor is also connected with the output end of the second transmission sub-module.
In an embodiment of the utility model, the third transmission module includes an operational amplifier, a sixth resistor and a seventh resistor, an output end of the operational amplifier is connected to an input end of the main control unit, a positive voltage source of the operational amplifier is connected to a negative voltage source of the operational amplifier and an output end of the fourth transmission module through the sixth resistor and the seventh resistor and is grounded, and a non-inverting input end of the operational amplifier is connected to an output end of the fourth transmission module and is grounded.
In an embodiment of the utility model, the fourth transmission module includes an optical coupler and an eighth resistor, the second output end of the optical coupler is connected to the input end of the third transmission module, and the second output end of the optical coupler is connected to the input end of the third transmission module through the eighth resistor and grounded.
The utility model provides an intelligent solid-state relay adopting a control circuit, which comprises a shell and a bottom radiating plate arranged on the shell, wherein a circuit board positioned in the shell is arranged on the bottom radiating plate, the control circuit is arranged on the circuit board, the circuit board is arranged on the bottom radiating plate through a support frame, and a control port connected with the circuit board is further arranged on the outer surface of the shell.
As described above, the control circuit and the intelligent solid-state relay using the same of the present utility model have the following
The beneficial effects are that:
according to the utility model, the field effect transistor in the first transmission sub-module plays a role in power amplification, the transformer in the second transmission sub-module plays a role in safety isolation, the bidirectional thyristor in the second transmission module can drive a load, the operational amplifier in the third transmission module can amplify a load signal, and the optical coupler in the fourth transmission module can well isolate an input signal and an output signal, so that the load signal is transmitted to the main control unit through the fourth transmission module and the third transmission module, and the main control unit can obtain alternating current synchronous information of driving pulses and short circuit and open circuit information of the load according to the period and amplitude of the load signal.
Drawings
FIG. 1 is a block diagram showing the overall structure of a control circuit disclosed in an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a control circuit disclosed in an embodiment of the present utility model;
fig. 3 is a schematic perspective view of an intelligent solid state relay disclosed in an embodiment of the present utility model.
1. A bottom heat dissipation plate; 2. a circuit board; 3. a support frame; 4. a housing; 5. and a control port.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Embodiment one:
referring to fig. 1, the present utility model provides a control circuit, which includes a control unit for sending a control signal and receiving a load signal, a thyristor driving unit for transmitting the control signal, and a load signal transmitting unit for transmitting the load signal.
Referring to fig. 2, the main control unit includes a main control chip, and a main control chip U2 is selected as an example for illustration.
The control end of the main control chip U2 is connected with the input end of the silicon controlled drive unit, the input end of the main control chip U2 is connected with the output end of the load signal transmission unit, wherein an analog quantity interface and a communication interface are further arranged on the main control chip U2, an analog quantity module is connected to the analog quantity interface of the main control chip U2 and comprises a temperature sensor, a pressure sensor and other sensors, a plug connector CN_C is connected to the communication interface of the main control chip U2, and the control end of the main control chip U2 is connected with the voltage stabilizing integrated circuit and is further connected with the first voltage source.
Referring to fig. 1, the thyristor driving unit includes a first transmission module for transmitting a control signal and a second transmission module for driving a load, wherein the first transmission module includes a first transmission sub-module for amplifying power and a second transmission sub-module for isolating.
Referring to fig. 2, the first transmission sub-module includes a field effect transistor and a first capacitor, and the first transmission sub-module further includes a first resistor, and the field effect transistor Q, the first capacitor C1 and the first resistor R1 are selected as examples for illustration.
The grid electrode of the field effect tube Q is connected with one end of a first capacitor C1, the other end of the first capacitor C1 is connected with the control end of the main control unit, the grid electrode of the field effect tube Q is also connected with the source electrode of the field effect tube Q through a first resistor R1, the source electrode of the field effect tube Q is grounded, the drain electrode of the field effect tube Q is connected with the input end of the second transmission sub-module, and the field effect tube Q plays a role in power amplification.
Referring to fig. 2, the second transmission sub-module includes a transformer and a second diode, and the second transmission sub-module further includes a first diode, a second resistor, and a second capacitor, and the transformer T, the second diode D2, the first diode D1, the second resistor R2, and the second capacitor C2 are selected as examples for illustration.
The first input end of the transformer T is connected with the cathode of the first diode D1 and the anode of the second capacitor C2, the cathode of the second capacitor C2 is grounded, the first input end of the transformer T is connected with the second voltage source through the second resistor R2, the second capacitor C2 is an electrolytic capacitor, the second input end of the transformer T is connected with the output end of the first transmission sub-module, the first output end of the transformer T is connected with the anode of the second diode D2, the cathode of the second diode D2 and the second output end of the transformer T are connected with the input end of the second transmission module, and the transformer T plays a role in safety isolation, so that when the primary side or the secondary side of the transformer T is abnormal, normal electricity utilization of the other side is not influenced.
Referring to fig. 2, the second transmission module includes a triac, and the second transmission module further includes a third resistor, a varistor, and a third capacitor, and the triac SCR, the third resistor R3, the varistor ZNR, and the third capacitor C3 are selected as examples for illustration.
The control end of the bidirectional thyristor SCR is connected with the output end of the second transmission submodule, the first pin of the bidirectional thyristor SCR is respectively connected with one end of the piezoresistor ZNR and the positive electrode of the third capacitor C3, the first pin of the bidirectional thyristor SCR is a load terminal L, the second pin of the bidirectional thyristor SCR is connected with the output end of the second transmission submodule through the third resistor R3, the second pin of the bidirectional thyristor SCR is also connected with the output end of the second transmission submodule, the second pin of the bidirectional thyristor SCR is connected with the other end of the piezoresistor ZNR, the negative electrode of the third capacitor C3 and the other end of the piezoresistor ZNR are connected with the two ends of the fourth resistor R4, wherein the fourth resistor R4 is a load element, the second pin of the bidirectional thyristor SCR is a load terminal L1, the bidirectional thyristor SCR is a controllable silicon, and plays a role in driving a load, and the function similar to that of a lightning arrester or an overvoltage protector in a circuit.
Referring to fig. 1, the load signal transmission module includes a third transmission module for amplifying a load signal and a fourth transmission module for isolating the load signal.
Referring to fig. 2, the third transmission module includes an operational amplifier, a sixth resistor and a seventh resistor, and in this embodiment, the model of the operational amplifier is LMV321, and the operational amplifier U4, the sixth resistor R6 and the seventh resistor R7 are selected as examples for illustration.
The output end of the operational amplifier U4 is connected with the input end of the main control unit, the positive voltage end of the operational amplifier U4 is connected with the third voltage source, the positive voltage source of the operational amplifier U4 is connected with the negative voltage source end of the operational amplifier U4 through a sixth resistor R6, the positive voltage source of the operational amplifier U4 is connected with the negative voltage source of the operational amplifier U4 and the output end of the fourth transmission module through a sixth resistor R6 and a seventh resistor R7 and is grounded, the non-inverting input end of the operational amplifier U4 is connected with the output end of the fourth transmission module and is grounded, and the operational amplifier U4 plays a role in amplifying load signals.
Referring to fig. 2, the fourth transmission module includes an optocoupler and an eighth resistor, and the fourth transmission module further includes a fourth capacitor, a third diode, and a fifth resistor, and the optocoupler U3, the eighth resistor R8, the fourth capacitor C4, the third diode D3, and the fifth resistor R5 are selected as examples for illustration.
The first input end of the optical coupler U3 is a load terminal L, the second input end of the optical coupler U3 is connected with the positive electrode of the third diode D3, one end of the negative electrode of the third diode D3 through the fifth resistor R5 is a load terminal L1, the first output end of the optical coupler U3 is connected with a fourth voltage source, the second output end of the optical coupler U3 is connected with the input end of the third transmission module through the eighth resistor R8 and grounded, the second output end of the optical coupler U3 is connected with the positive electrode of the fourth capacitor C4, and the negative electrode of the fourth capacitor C4 is grounded, wherein the optical coupler U3 can well isolate input signals and output signals, and the input signals can not be interfered by each other.
Specifically, when the intelligent solid-state relay works, a load signal generated at the load terminal is subjected to half-wave rectification through a third diode D3 by voltage drops at two ends of the load terminals L and L1, then isolated by an optical coupler U3, amplified by an operational amplifier U4, and finally transmitted to a main control chip U2, the main control chip U2 can obtain AC synchronous information of driving pulses and short circuit and open circuit information of loads according to the period and amplitude of the load signal, and the load signal is identified: when the load is broken, no voltage drop exists at the two ends of the load terminals L and L1, and the main control chip U2 cannot detect any signal; when a load is short-circuited, voltage drops at two ends of the load terminals L and L1 are maximum, so that a load signal is also maximum, the main control chip U2 can obtain alternating current synchronous information of driving pulses according to the period and amplitude of the load signal, the alternating current synchronous information ensures that the main control chip U2 can drive the silicon controlled rectifier in a zero crossing mode, then the main control chip U2 sends a control signal to the load, the field effect transistor Q plays a role in amplifying power, the transformer T plays an isolating role, and finally the control signal plays a driving role by using the silicon controlled rectifier (bidirectional thyristor) SCR, and stepless regulation and control of the load power can be achieved through setting of the main control chip U2 and software.
Embodiment two:
referring to fig. 3, the utility model provides an intelligent solid-state relay adopting the control circuit, which comprises a shell 4 and a bottom heat dissipation plate 1 arranged on the shell 4, wherein a circuit board 2 positioned in the shell 4 is arranged on the bottom heat dissipation plate 1, the control circuit is arranged on the circuit board 2, the circuit board 2 is arranged on the bottom heat dissipation plate 1 through a support frame 3, and a control port 5 connected with the circuit board 2 is further arranged on the outer surface of the shell 4.
In summary, the utility model plays a role of amplifying power through the field effect transistor in the first transmission sub-module, the transformer in the second transmission sub-module plays a role of safely isolating, the bidirectional thyristor in the second transmission module can drive a load, the operational amplifier in the third transmission module can amplify a load signal, the optical coupler in the fourth transmission module can well isolate an input signal and an output signal, so that the load signal is transmitted to the main control unit through the fourth transmission module and the third transmission module, the main control unit can obtain alternating current synchronous information of driving pulses and short circuit and disconnection information of the load according to the period and amplitude of the load signal, the utility model can also realize stepless regulation and control of power, and can also conveniently realize closed loop control and informatization of a system. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. A control circuit, comprising: the control unit is used for sending out control signals and receiving load signals, the controllable silicon driving unit is connected with the control end of the main control unit and used for transmitting the control signals, the load signal transmission unit is connected with the input end of the main control unit and used for transmitting the load signals, and the output end of the controllable silicon driving unit and the input end of the load signal transmission unit are connected with a load;
the controllable silicon driving unit comprises a first transmission module for transmitting control signals and a second transmission module for driving loads, wherein the input end of the first transmission module is connected with the control end of the main control unit, the output end of the first transmission module is connected with the input end of the second transmission module, the output end of the second transmission module is connected with the loads, the load signal transmission module comprises a third transmission module for amplifying the load signals and a fourth transmission module for playing an isolation role, the output end of the third transmission module is connected with the input end of the main control unit, the input end of the third transmission module is connected with the input end of the fourth transmission module, and the input end of the fourth transmission module is connected with the loads.
2. A control circuit according to claim 1, wherein: the main control unit comprises a main control chip, the control end of the main control chip is connected with the input end of the silicon controlled drive unit, the input end of the main control chip is connected with the output end of the load signal transmission unit, and the main control chip is also provided with an analog quantity interface and a communication interface.
3. A control circuit according to claim 1, wherein: the first transmission module comprises a first transmission sub-module for amplifying power and a second transmission sub-module for playing an isolation role, wherein the input end of the first transmission sub-module is connected with the control end of the main control unit, the output end of the first transmission sub-module is connected with the input end of the second transmission sub-module, and the output end of the second transmission sub-module is connected with the input end of the second transmission module.
4. A control circuit according to claim 3, wherein: the first transmission submodule comprises a field effect tube and a first capacitor, wherein a grid electrode of the field effect tube is connected with one end of the first capacitor, the other end of the first capacitor is connected with a control end of the main control unit, and a drain electrode of the field effect tube is connected with an input end of the second transmission submodule.
5. A control circuit according to claim 3, wherein: the second transmission submodule comprises a transformer and a second diode, a second input end of the transformer is connected with an output end of the first transmission submodule, a first output end of the transformer is connected with a positive electrode of the second diode, and a negative electrode of the second diode and a second output end of the transformer are both connected with an input end of the second transmission module.
6. A control circuit according to claim 1, wherein: the second transmission module comprises a bidirectional thyristor, the control end of the bidirectional thyristor is connected with the output end of the second transmission sub-module, the second pin of the bidirectional thyristor is connected with the output end of the second transmission sub-module through a third resistor, and the second pin of the bidirectional thyristor is also connected with the output end of the second transmission sub-module.
7. A control circuit according to claim 1, wherein: the third transmission module comprises an operational amplifier, a sixth resistor and a seventh resistor, wherein the output end of the operational amplifier is connected with the input end of the main control unit, the positive voltage source of the operational amplifier is connected with the negative voltage source of the operational amplifier and the output end of the fourth transmission module through the sixth resistor and the seventh resistor and is grounded, and the non-inverting input end of the operational amplifier is connected with the output end of the fourth transmission module and is grounded.
8. A control circuit according to claim 1, wherein: the fourth transmission module comprises an optical coupler and an eighth resistor, a second output end of the optical coupler is connected with an input end of the third transmission module, and a second output end of the optical coupler is connected with an input end of the third transmission module through the eighth resistor and grounded.
9. An intelligent solid state relay employing the control circuit as claimed in any one of claims 1 to 8, comprising a housing and a bottom heat sink mounted on said housing, characterized in that: the bottom cooling plate is provided with a circuit board positioned in the shell, the control circuit is arranged on the circuit board, the circuit board is arranged on the bottom cooling plate through a support frame, and the outer surface of the shell is also provided with a control port connected with the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321217295.9U CN219812143U (en) | 2023-05-18 | 2023-05-18 | Control circuit and intelligent solid-state relay adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321217295.9U CN219812143U (en) | 2023-05-18 | 2023-05-18 | Control circuit and intelligent solid-state relay adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219812143U true CN219812143U (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321217295.9U Active CN219812143U (en) | 2023-05-18 | 2023-05-18 | Control circuit and intelligent solid-state relay adopting same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219812143U (en) |
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2023
- 2023-05-18 CN CN202321217295.9U patent/CN219812143U/en active Active
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