A self-holding cancellation circuit for solid-state relay
By designing switch circuits and load power circuits in solid-state relays, and using control signals and revocation instructions to quickly control the opening and closing state of solid-state relays, the problem of low revocation efficiency of self-holding circuits of solid-state relays is solved, and efficient state management and miniaturization are achieved design.
Patent Information
- Application Number
- CN202111576123.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2041-12-21
AI Technical Summary
The revocation efficiency of existing solid-state relay self-holding circuits is low, and the load power is required to be revoked to restore the original state, which affects the efficiency of use.
A self-holding cancellation circuit including a switching circuit, a load power circuit and a solid state relay is designed. The load power is turned on through the control signal to make the solid state relay in a self-holding state, and the control circuit is disconnected according to the cancellation command through the potential pull-down circuit. , undo the self-retaining state, without the need to undo the load power supply.
It realizes rapid control and efficient cancellation of solid-state relays, reduces control power and structural volume, is conducive to the miniaturization and high-integration design of the aircraft, and improves the efficiency of use.
Smart Images
Figure CN114244331B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of solid-state relays, and in particular to a self-holding cancellation circuit of a solid-state relay. Background Art
[0002] In order to save resources, when using relays to switch loads, the aircraft system often hopes that after the relay is switched, it will remain in the switching state when the control signal is canceled; after it completes its work task, a cancellation command will be issued to restore it to its original state.
[0003] Traditional aircraft systems use mechanical switches such as magnetic latching relays and electromagnetic relays, which can easily achieve this control requirement. However, their disadvantages are that they require high control power, and the electromagnetic relays have a limited lifespan and poor mechanical resistance. The structure is large, which is not conducive to the miniaturization and high-integration design of the aircraft. In addition, the switching action time is long, which does not meet the rapid response needs of modern aircraft.
[0004] The above disadvantages can be overcome by using solid-state relays. However, when using solid-state relays, the power must be supplied through the load-end return line to maintain the state. After completing the work task, the load power supply must also be removed to restore it to its original state. This makes the application inconvenient and reduces the efficiency of use. Summary of the invention
[0005] In view of the above analysis, an embodiment of the present invention aims to provide a solid-state relay self-holding cancellation circuit to solve the problem of low efficiency when canceling self-holding in the existing solid-state relay self-holding circuit.
[0006] On the one hand, an embodiment of the present invention provides a solid-state relay self-holding cancellation circuit, comprising:
[0007] The self-holding circuit comprises a switch circuit, a load power supply circuit and a solid-state relay; the control positive end of the solid-state relay receives a control signal; one end of the switch circuit serves as an input end to receive the control signal, and the other end serves as an output end, connected to the control negative end of the solid-state relay, and the switch circuit controls the closing of the solid-state relay according to the control signal; when the solid-state relay is closed, the connection between the power supply and the power load is connected; the load power supply is transferred to the input end of the switch circuit through the load power supply circuit, and the load power supply is used to power the solid-state relay, so that the solid-state relay is in a self-holding state;
[0008] The potential lowering circuit is used to disconnect the output end of the switch circuit from the negative control end of the solid-state relay according to the cancellation instruction, so as to cancel the self-holding of the solid-state relay.
[0009] The beneficial effects of the above technical solution are as follows: by adopting a self-holding circuit, when a control signal is received, the solid-state relay can be quickly controlled to close, and the power supply and electrical load on the aircraft are connected; the load power supply is transferred to the input end of the switch circuit through the load power supply circuit, and the load power supply is used to power the solid-state relay, so that the solid-state relay is in a self-holding state; the solid-state relay has a small control power, has a high mechanical resistance, and a small structural volume, which is conducive to the miniaturization and high integration design of the aircraft; the solid-state relay can be quickly disconnected according to the cancellation instruction through the potential lowering circuit, thereby canceling the self-holding state of the solid-state relay; the self-holding of the solid-state relay can be canceled without canceling the load power supply, which is simple to implement and improves the use efficiency.
[0010] Based on the further improvement of the above method, the switching circuit includes: a first resistor, a first diode and a first transistor; one end of the first resistor receives a control signal, and the other end is connected to the positive electrode of the first diode; the negative electrode of the first diode is connected to the base of the first transistor; the collector of the first transistor is connected to the control negative terminal of the solid-state relay, and the emitter of the first transistor is grounded.
[0011] The beneficial effects of the above technical solution are as follows: when a high-level control signal is received, the collector and emitter of the first transistor of the switching circuit are turned on, so that the control end circuit of the solid-state relay is turned on, the solid-state relay is closed, the connection between the power supply at the output end and the power load is connected, and the solid-state relay is powered by the load power supply circuit. When the control signal is cancelled, the solid-state relay is still in a self-holding state. The structure is simple, easy to implement, the switching action time is short, and it can quickly respond to the relay closing control signal.
[0012] Based on the further improvement of the above method, the switching circuit includes: a first resistor and a first field effect transistor; one end of the first resistor receives a control signal, and the other end is connected to the gate of the first field effect transistor; the drain of the first field effect transistor is connected to the negative control terminal of the solid-state relay, and the source of the first field effect transistor is grounded.
[0013] The beneficial effects of the above technical solution are as follows: when a high-level control signal is received, the drain and source of the first field effect transistor of the switching circuit are turned on, so that the control end circuit of the solid-state relay is turned on, the solid-state relay is closed, the connection between the power supply at the output end and the power load is connected, and the solid-state relay is powered by the load power supply circuit. When the control signal is cancelled, the solid-state relay is still in a self-holding state. The structure is simple and easy to implement, the switching action time is short, and it can quickly respond to the relay closing control signal.
[0014] Based on the further improvement of the above method, the switching circuit also includes a protection circuit, which includes a second resistor and a first voltage regulator, one end of the second resistor is connected to the gate of the first field effect transistor, and the other end is connected to the source of the first field effect transistor; the negative electrode of the first voltage regulator is connected to the gate of the first field effect transistor, and the other end is connected to the source of the first field effect transistor.
[0015] The beneficial effects of the above technical solution are as follows: the second resistor R2 and the first voltage regulator are used to divide and stabilize the voltage, so that the voltage of the first field effect tube is stabilized, and the first field effect tube V2 is prevented from breaking down.
[0016] Based on the further improvement of the above method, the potential lowering circuit includes a second transistor, the base of the second transistor receives the revocation instruction, the collector is connected to the anode of the first diode or the gate of the first field effect transistor, and the emitter is connected to the emitter of the first transistor or the source of the first field effect transistor.
[0017] The beneficial effects of the above technical solution are as follows: when a high-level signal of a cancellation instruction is received, the collector and emitter of the second transistor are turned on, thereby disconnecting the collector and emitter of the first transistor or the drain and source of the first field effect transistor, thereby disconnecting the control circuit of the solid-state relay and canceling the self-holding of the solid-state relay. The structure is simple and easy to implement. The solid-state relay is directly disconnected by the cancellation instruction, and there is no need to cancel the load power supply, thereby cutting off the connection between the electrical load and the power supply, thereby improving the efficiency of power control on the aircraft.
[0018] Based on the further improvement of the above method, the potential pull-down circuit includes a second field effect, the gate of the second field effect tube is connected to the revocation instruction, the drain is connected to the anode of the first diode or the gate of the first field effect tube, and the source is connected to the emitter of the first transistor or the source of the first field effect tube.
[0019] The beneficial effects of the above technical solution are as follows: when a high-level signal of a cancellation instruction is received, the drain and source of the second field effect tube are turned on, thereby disconnecting the collector and emitter of the first transistor or the drain and source of the first field effect tube, thereby disconnecting the control circuit of the solid-state relay and canceling the self-holding of the solid-state relay. The structure is simple and easy to implement. The solid-state relay is directly disconnected by the cancellation instruction without canceling the load power supply, thereby cutting off the connection between the power load and the power supply, thereby improving the efficiency of power control on the aircraft.
[0020] Based on a further improvement of the above method, one end of the load power supply circuit is connected to the power input end of the power load, and the other end is connected to the control positive end of the solid-state relay.
[0021] The beneficial effects of the above technical solution are as follows: the solid-state relay is powered by the load power supply circuit, so that when the control signal is revoked, the solid-state relay remains in a self-protection state, and the structure is simple and easy to implement.
[0022] A further improvement based on the above method also includes a threshold circuit and an anti-interference circuit; the input end of the threshold circuit is connected to the cancel instruction, the output end is connected to the input end of the anti-interference circuit, and the output end of the anti-interference circuit is connected to the input end of the potential lowering circuit; the threshold circuit is used to increase the threshold voltage of the cancel instruction; the anti-interference circuit is used to filter the interference signal.
[0023] Based on the further improvement of the above method, the threshold circuit includes: a third diode V7, a fourth diode V11, a second voltage regulator tube V8, a third voltage regulator tube V12, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third triode V9, a fourth triode V10 and a first capacitor C1, the positive electrode of the third diode V7 is connected to the input end of the threshold circuit of the revocation instruction, the negative electrode is connected to the emitter of the third triode V9, the collector of the third triode V9 is connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is the output end of the threshold circuit; one end of the fourth resistor R4 is connected to the base of the third triode V9, and the other end is connected to the base of the third triode V9. the collector of the fourth triode V10; the base of the fourth triode V10 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the collector of the third triode V9; one end of the third resistor R3 is connected to the emitter of the third triode V9, and the other end is connected to the collector of the fourth triode V10; the cathode of the second voltage-stabilizing tube V8 is connected to the collector of the fourth triode V10, and the cathode is grounded; the anode of the fourth diode V11 is connected to the emitter of the fourth triode V10, and the cathode is connected to the cathode of the third voltage-stabilizing tube V12, and the anode of the third voltage-stabilizing tube V12 is grounded; one end of the first capacitor is grounded and the other end is connected to the output end of the threshold circuit.
[0024] The beneficial effects of the above technical solution are as follows: the base voltage of the third transistor V9 is increased by the action of the second voltage regulator tube V8. When the input voltage is greater than the voltage regulation value of the second voltage regulator tube V8, the second voltage regulator tube V8 stabilizes the base voltage of the third transistor V9 at the voltage regulation value of the second voltage regulator tube V8. Then, the emitter voltage of the third transistor V9 is greater than the base voltage, the third transistor V9 is turned on, and the instruction output is canceled.
[0025] Based on the further improvement of the above method, the anti-interference circuit includes: a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a fourth voltage regulator tube V13, a fifth voltage regulator tube V15, a fifth diode V16, a sixth diode V17, a fifth triode V14 and a second capacitor C2, one end of the seventh resistor R7 is used as the input end of the anti-interference circuit, connected to the output end of the threshold circuit, and the other end is connected to the negative electrode of the fourth voltage regulator tube V13; the positive electrode of the fourth voltage regulator tube V13 is grounded; the eighth resistor R8 and the fifth triode V14 are connected to the output end of the threshold circuit, and the positive electrode of the fourth voltage regulator tube V13 is grounded; the eighth resistor R8 and the fifth triode V14 are connected to the output end of the threshold circuit, and the positive electrode of the fourth voltage regulator tube V13 is grounded; the eighth resistor R8 and the fifth triode V14 are connected to the output end of the threshold circuit, and the fifth triode V14 is connected to the second capacitor C2; the seventh resistor R7 is used as the input end of the anti-interference circuit, connected to the output end of the threshold circuit, and the seventh resistor R7 is used as the input end of the anti-interference circuit, and the eighth ... The fourth voltage regulator is connected in parallel; one end of the second capacitor is connected to the emitter of the fifth transistor V15, and the other end is connected to one end of the ninth resistor R9, and the other end of the ninth resistor R9 is grounded; the collector of the fifth transistor V14 serves as the output end of the anti-interference circuit; the base of the fifth transistor V14 is connected to the cathode of the fifth voltage regulator V15, the anode of the fifth voltage regulator V15 is connected to the anode of the fifth diode V16, the cathode of the fifth diode V16 is connected to the cathode of the sixth diode V17, and the anode of the sixth diode V17 is grounded.
[0026] The beneficial effects of the above technical solution are as follows: after the cancel instruction input is stabilized by the fourth voltage regulator tube V13, the second capacitor C2 is charged to control the on and off of the fifth transistor V14, and the instruction pulse width affects the voltage across the second capacitor C2, thereby effectively eliminating interference pulses.
[0027] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like components throughout the drawings.
[0029] Figure 1 A circuit diagram of a self-holding cancellation circuit of a solid-state relay according to an embodiment of the present invention;
[0030] FIG. 2( a) is a circuit diagram of a self-holding cancellation circuit of a solid-state relay according to an embodiment of the present invention;
[0031] FIG2( b ) is a circuit diagram of a self-holding cancellation circuit of a solid-state relay according to an embodiment of the present invention;
[0032] FIG2( c ) is a circuit diagram of a self-holding cancellation circuit of a solid-state relay according to an embodiment of the present invention;
[0033] FIG2( d ) is a circuit diagram of a self-holding cancellation circuit of a solid-state relay according to an embodiment of the present invention;
[0034] Figure 3 is a circuit diagram of a threshold circuit according to an embodiment of the present invention;
[0035] Figure 4 FIG. 4 is a circuit diagram of an anti-interference circuit according to an embodiment of the present invention. DETAILED DESCRIPTION
[0036] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.
[0037] A specific embodiment of the present invention discloses a solid-state relay self-holding cancellation circuit, such as Figure 1 As shown, including:
[0038] The self-holding circuit comprises a switch circuit, a load power supply circuit and a solid-state relay; the control positive end of the solid-state relay receives a control signal; one end of the switch circuit serves as an input end to receive the control signal, and the other end serves as an output end, connected to the control negative end of the solid-state relay, and the switch circuit controls the closing of the solid-state relay according to the control signal; when the solid-state relay is closed, the connection between the power supply and the power load is connected; the load power supply is transferred to the input end of the switch circuit through the load power supply circuit, and the load power supply is used to power the solid-state relay, so that the solid-state relay is in a self-holding state;
[0039] The potential lowering circuit is used to disconnect the output end of the switch circuit from the negative control end of the solid-state relay according to the cancellation instruction, so as to cancel the self-holding of the solid-state relay.
[0040] By adopting a self-holding circuit, when a control signal is received, the solid-state relay can be quickly controlled to close, and the power supply and electrical load on the aircraft are connected. The load power supply is transferred to the input end of the switch circuit through the load power supply circuit, and the load power supply is used to power the solid-state relay, so that the solid-state relay is in a self-holding state. The solid-state relay has a small control power, a high mechanical resistance, and a small structure, which is conducive to the miniaturization and high integration design of the aircraft. The solid-state relay can be quickly disconnected according to the cancellation instruction through the potential lowering circuit, thereby canceling the self-holding state of the solid-state relay. The self-holding of the solid-state relay can be canceled without canceling the load power supply. The implementation is simple and the use efficiency is improved.
[0041] During implementation, one end of the load power supply circuit is connected to the power input end of the electrical load, and the other end is connected to the control positive end of the solid-state relay. The controlled input of the solid-state relay is connected to the power supply, and the controlled output is connected to the electrical load.
[0042] Specifically, as shown in FIG. 2(a) and FIG. 2(b), the switch circuit includes: a first resistor R1, a first diode V1 and a first transistor V2; a first resistor R1, a first diode V1 and a first transistor V2; one end of the first resistor receives a control signal, and the other end is connected to the positive electrode of the first diode; the negative electrode of the first diode is connected to the base of the first transistor; the collector of the first transistor is connected to the negative control terminal of the solid-state relay. The emitter of the first transistor is grounded. When a high-level control signal is received, the collector and emitter of the first transistor of the switch circuit are turned on, so that the control end circuit of the solid-state relay is turned on, the solid-state relay is closed, the power supply at the output end and the power load are connected, and the load power supply is transferred to the positive control terminal of the solid-state relay through the load power supply circuit to power the solid-state relay. When the control signal is cancelled, the solid-state relay is still in a self-holding state.
[0043] When implementing, Figure 2(c) and 2(d) As shown, the switch circuit may also include: a first resistor R1 and a first field effect transistor V2; one end of the first resistor receives the control signal, and the other end is connected to the gate of the first field effect transistor; the drain of the first field effect transistor is connected to the negative control terminal of the solid-state relay. The source of the first field effect transistor is grounded. When a high-level control signal is received, the drain and source of the first field effect transistor of the switch circuit are turned on, so that the control end loop of the solid-state relay is turned on, the solid-state relay is closed, the power supply at the output end and the power load are connected, and the solid-state relay is powered by the load power supply circuit. When the control signal is canceled, the solid-state relay is still in a self-holding state.
[0044] In order to further protect the first field effect transistor from breakdown, the switch circuit also includes a protection circuit.
[0045] Specifically, the protection circuit includes a second resistor R2 and a first voltage regulator tube V1, one end of the second resistor is connected to the gate of the first field effect tube, and the other end is connected to the source of the first field effect tube; the negative electrode of the first voltage regulator tube is connected to the gate of the first field effect tube, and the other end is connected to the source of the first field effect tube. The second resistor R2 and the first voltage regulator tube are used to divide and stabilize the voltage, so that the voltage of the first field effect tube is stabilized to prevent the first field effect tube V2 from breaking down.
[0046] like Figure 2(a) and 2(c)As shown, the potential pull-down circuit includes a second triode V3, the base of the second triode receives the cancellation instruction, the collector is connected to the anode of the first diode or the gate of the first field effect tube, and the emitter is connected to the emitter of the first triode or the source of the first field effect tube. When receiving the cancellation instruction high level signal, the collector and emitter of the second triode are turned on, so that the collector and emitter of the first triode are disconnected or the drain and source of the first field effect tube are disconnected, thereby disconnecting the control loop of the solid-state relay and canceling the self-holding of the solid-state relay.
[0047] When implementing, Figure 2(b) and 2(d) As shown, the potential pull-down circuit may also include a second field effect transistor V4, the gate of the second field effect transistor is connected to the cancellation instruction, the drain is connected to the anode of the first diode or the gate of the first field effect transistor, and the source is connected to the emitter of the first transistor or the source of the first field effect transistor. When receiving the high-level signal of the cancellation instruction, the drain and source of the second field effect transistor are turned on, so that the collector and emitter of the first transistor are disconnected or the drain and source of the first field effect transistor are disconnected, thereby disconnecting the control loop of the solid-state relay and canceling the self-holding of the solid-state relay.
[0048] During implementation, the switch circuit and the potential lowering circuit are connected in a common ground manner.
[0049] In order to further improve the control accuracy and prevent misoperation, the self-holding cancellation circuit also includes a threshold circuit and an anti-interference circuit; the input end of the threshold circuit is connected to the cancellation instruction, and the output end is connected to the input end of the anti-interference circuit, and the output end of the anti-interference circuit is connected to the input end of the potential pull-down circuit; the threshold circuit is used to increase the threshold voltage of the cancellation instruction; the anti-interference circuit is used to filter the interference signal.
[0050] When implementing, Figure 3As shown, the threshold circuit includes: a third diode V7, a fourth diode V11, a second voltage regulator tube V8, a third voltage regulator tube V12, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third triode V9, a fourth triode V10 and a first capacitor C1, the positive electrode of the third diode V7 is connected to the input end of the threshold circuit of the cancellation instruction, the negative electrode is connected to the emitter of the third triode V9, the collector of the third triode V9 is connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is the output end of the threshold circuit; one end of the fourth resistor R4 is connected to the base of the third triode V9, and the other end is connected to the fourth triode The collector of the transistor V10; the base of the fourth transistor V10 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the collector of the third transistor V9; one end of the third resistor R3 is connected to the emitter of the third transistor V9, and the other end is connected to the collector of the fourth transistor V10; the cathode of the second voltage-stabilizing tube V8 is connected to the collector of the fourth transistor V10, and the cathode is grounded; the anode of the fourth diode V11 is connected to the emitter of the fourth transistor V10, and the cathode is connected to the cathode of the third voltage-stabilizing tube V12, and the anode of the third voltage-stabilizing tube V12 is grounded; one end of the first capacitor is grounded and the other end is connected to the output end of the threshold circuit. The base voltage of the third transistor V9 is increased by the second voltage regulator tube V8. When the input voltage is greater than the voltage regulation value of the second voltage regulator tube V8, the second voltage regulator tube V8 stabilizes the base voltage of the third transistor V9 at the voltage regulation value of the second voltage regulator tube V8. Then, the emitter voltage of the third transistor V9 is greater than the base voltage, the third transistor V9 is turned on, and the command output is canceled.
[0051] When implementing, Figure 4As shown, the anti-interference circuit includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a fourth voltage regulator tube V13, a fifth voltage regulator tube V15, a fifth diode V16, a sixth diode V17, a fifth triode V14 and a second capacitor C2, one end of the seventh resistor R7 is used as the input end of the anti-interference circuit, connected to the output end of the threshold circuit, and the other end is connected to the negative electrode of the fourth voltage regulator tube V13; the positive electrode of the fourth voltage regulator tube V13 is grounded; the eighth resistor R8 is connected in parallel with the fourth voltage regulator tube; one end of the second capacitor is connected to the emitter of the fifth triode V15, and the other end is connected to one end of the ninth resistor R9, and the other end of the ninth resistor R9 is grounded; the collector of the fifth triode V14 is used as the output end of the anti-interference circuit; the base of the fifth triode V14 is connected to the negative electrode of the fifth voltage regulator tube V15, the positive electrode of the fifth voltage regulator tube V15 is connected to the positive electrode of the fifth diode V16, the negative electrode of the fifth diode V16 is connected to the negative electrode of the sixth diode V17, and the positive electrode of the sixth diode V17 is grounded. After the cancel instruction input is stabilized by the fourth voltage regulator V13, the second capacitor C2 is charged to control the on and off of the fifth transistor V14. The instruction pulse width affects the voltage across the second capacitor C2, thereby effectively eliminating the interference pulse.
[0052] During implementation, the threshold circuit and the anti-interference circuit can be connected with the switch circuit and the potential-lowering circuit in a common ground manner.
[0053] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.
[0054] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.
Claims
1. A solid-state relay self-holding cancellation circuit, characterized in that: include: The self-holding circuit comprises a switch circuit, a load power supply circuit and a solid-state relay; the control positive end of the solid-state relay receives a control signal; one end of the switch circuit serves as an input end to receive the control signal, and the other end serves as an output end, connected to the control negative end of the solid-state relay, and the switch circuit controls the closing of the solid-state relay according to the control signal; when the solid-state relay is closed, the connection between the power supply and the power load is connected; the load power supply is transferred to the input end of the switch circuit through the load power supply circuit, and the load power supply is used to power the solid-state relay, so that the solid-state relay is in a self-holding state; The potential lowering circuit is used to disconnect the output end of the switch circuit from the negative control end of the solid-state relay according to the cancellation instruction, so as to cancel the self-holding of the solid-state relay.
2. The solid-state relay self-holding cancellation circuit according to claim 1, characterized in that: The switch circuit includes: a first resistor, a first diode and a first transistor; one end of the first resistor receives a control signal, and the other end is connected to the anode of the first diode; the cathode of the first diode is connected to the base of the first transistor; the collector of the first transistor is connected to the negative control terminal of the solid-state relay, and the emitter of the first transistor is grounded.
3. The solid-state relay self-holding cancellation circuit according to claim 1, characterized in that: The switch circuit includes: a first resistor and a first field effect transistor; one end of the first resistor receives a control signal, and the other end is connected to the gate of the first field effect transistor; the drain of the first field effect transistor is connected to the negative control terminal of the solid-state relay, and the source of the first field effect transistor is grounded.
4. The solid-state relay self-holding cancellation circuit according to claim 3, characterized in that: The switching circuit also includes a protection circuit, which includes a second resistor and a first voltage regulator tube, one end of the second resistor is connected to the gate of the first field effect tube, and the other end is connected to the source of the first field effect tube; the negative electrode of the first voltage regulator tube is connected to the gate of the first field effect tube, and the other end is connected to the source of the first field effect tube.
5. The solid-state relay self-holding cancellation circuit according to claim 2, characterized in that: The potential-lowering circuit comprises a second transistor, the base of which receives a cancellation instruction, the collector of which is connected to the anode of the first diode, and the emitter of which is connected to the emitter of the first transistor.
6. The solid-state relay self-holding cancellation circuit according to claim 2, characterized in that: The potential-lowering circuit includes a second field effect transistor, a gate of the second field effect transistor is connected to the revocation instruction, a drain is connected to the anode of the first diode, and a source is connected to the emitter of the first transistor.
7. The solid-state relay self-holding cancellation circuit according to claim 1, characterized in that: One end of the load power supply circuit is connected to the power input end of the power load, and the other end is connected to the control positive end of the solid-state relay.
8. The solid-state relay self-holding cancellation circuit according to claim 1, characterized in that: It also includes a threshold circuit and an anti-interference circuit; the input end of the threshold circuit is connected to the cancel instruction, the output end is connected to the input end of the anti-interference circuit, and the output end of the anti-interference circuit is connected to the input end of the potential lowering circuit; the threshold circuit is used to increase the threshold voltage of the cancel instruction; the anti-interference circuit is used to filter the interference signal.
9. The solid-state relay self-holding cancellation circuit according to claim 8, characterized in that: The threshold circuit includes: a third diode V7, a fourth diode V11, a second voltage regulator tube V8, a third voltage regulator tube V12, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third triode V9, a fourth triode V10 and a first capacitor C1, wherein the positive electrode of the third diode V7 is connected to the input end of the threshold circuit of the revocation instruction, the negative electrode is connected to the emitter of the third triode V9, the collector of the third triode V9 is connected to one end of the sixth resistor R6, and the other end of the sixth resistor R6 is the output end of the threshold circuit; one end of the fourth resistor R4 is connected to the base of the third triode V9, and the other end is connected to the base of the fourth triode The collector of the fourth triode V10; the base of the fourth triode V10 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is connected to the collector of the third triode V9; one end of the third resistor R3 is connected to the emitter of the third triode V9, and the other end is connected to the collector of the fourth triode V10; the cathode of the second voltage-stabilizing tube V8 is connected to the collector of the fourth triode V10, and the cathode is grounded; the anode of the fourth diode V11 is connected to the emitter of the fourth triode V10, and the cathode is connected to the cathode of the third voltage-stabilizing tube V12, and the anode of the third voltage-stabilizing tube V12 is grounded; one end of the first capacitor is grounded and the other end is connected to the output end of the threshold circuit.
10. The solid-state relay self-holding cancellation circuit according to claim 8, characterized in that: The anti-interference circuit includes: a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a fourth voltage-stabilizing tube V13, a fifth voltage-stabilizing tube V15, a fifth diode V16, a sixth diode V17, a fifth triode V14 and a second capacitor C2, one end of the seventh resistor R7 is used as an input end of the anti-interference circuit, connected to the output end of the threshold circuit, and the other end is connected to the negative electrode of the fourth voltage-stabilizing tube V13; the positive electrode of the fourth voltage-stabilizing tube V13 is grounded; the eighth resistor R8 is connected in parallel with the fourth voltage-stabilizing tube; one end of the second capacitor is connected to the emitter of the fifth triode V15, and the other end is connected to one end of the ninth resistor R9, and the other end of the ninth resistor R9 is grounded; the collector of the fifth triode V14 is used as the output end of the anti-interference circuit; the base of the fifth triode V14 is connected to the negative electrode of the fifth voltage-stabilizing tube V15, the positive electrode of the fifth voltage-stabilizing tube V15 is connected to the positive electrode of the fifth diode V16, the negative electrode of the fifth diode V16 is connected to the negative electrode of the sixth diode V17, and the positive electrode of the sixth diode V17 is grounded.
11. The solid-state relay self-holding cancellation circuit according to claim 3, characterized in that: The potential-lowering circuit comprises a second transistor, the base of which receives a revocation instruction, the collector of which is connected to the gate of the first field effect transistor, and the emitter of which is connected to the source of the first field effect transistor.
12. The solid-state relay self-holding cancellation circuit according to claim 3, characterized in that: The potential-lowering circuit comprises a second field effect transistor, a gate of the second field effect transistor is connected to the revocation instruction, a drain is connected to the gate of the first field effect transistor, and a source is connected to the source of the first field effect transistor.