Control circuit

Abstract

The invention discloses a control circuit. The control circuit comprises a filtering control module, a self-locking module and a driving control module, the filtering control module, the self-locking module and the driving control module are sequentially connected, the filtering control module is respectively connected with a bus end and a control signal end, and the driving control module is connected with a rear-end equipment end. The control signal can be directly collected through the filtering control module, the subsequent circuit is controlled to be switched on or switched off according to the received control signal, a circuit switch does not need to be arranged to control signal transmission, multiple operations are not needed during control, signal transmission processing can be simplified, and the control efficiency can be improved; and each operation is triggered and processed through the control signal, so that the number of times of repeated operation can be reduced, the error probability is further reduced, and the control precision is improved.

Description

Background Art

[0002] With the development of science and technology, electronic devices have become increasingly popular. Different electronic devices have strict requirements for control circuits. By providing a steady-state control signal, different electronic devices can be controlled to achieve different functions, meeting the needs of different customers and usage scenarios.

[0003] One commonly used control circuit is a control circuit with pulse control protection function. One end of this control circuit is connected to the control terminal through a circuit switch, and the other end is connected to the device terminal through a self-locking protection module. Once the switch is pressed, the circuit can automatically maintain continuous power supply until another switch is pressed to make it open.

[0004] However, the currently commonly used control circuits have the following technical problems: Each time power is supplied, the user needs to control the circuit switch to conduct to trigger signal transmission to control the subsequent circuit. Once multiple signal transmissions are required, multiple control operations are needed. This not only makes the control cumbersome and inefficient, but also multiple manual repeated operations are prone to transmission errors, reducing the control accuracy. Summary of the Invention

[0005] The present invention proposes a control circuit, and the method can solve the technical problems of cumbersome control, low control efficiency, and reduced control accuracy in the prior art.

[0006] A first aspect of an embodiment of the present invention provides a control circuit, which includes: a filtering control module, a self-locking module, and a driving control module; The filtering control module, the self-locking module, and the driving control module are connected in sequence. The filtering control module is respectively connected to the bus terminal and the control signal terminal, and the driving control module is connected to the subsequent device terminal; Before the control signal is input to the control signal terminal, the filtering control module controls the self-locking module and the driving control module to disconnect according to the bus terminal; After the control signal is input to the control signal terminal, the filtering control module controls the self-locking module and the driving control module to conduct or disconnect according to the control signal.

[0007] The present invention can directly collect the control signal through the filtering control module, and control the subsequent circuit to conduct or close according to the received control signal. There is no need to set a circuit switch to control signal transmission, and no multiple operations are required during control, which can simplify signal transmission processing and improve control efficiency; and each operation is triggered and processed by the control signal, which can reduce the number of repeated operations, thereby reducing the probability of errors and improving the control accuracy.

[0008] In combination with the first aspect, in one implementation, the filtering control module includes: a start filtering unit and a stop filtering unit; The first end of the starting filter unit is connected to the busbar end, the second end of the starting filter unit is connected to the control signal end of the starting control signal, and the output end of the starting filter unit is connected to the self-locking module; The first end of the shutdown filter unit is connected to the busbar end, the second end of the shutdown filter unit is connected to the control signal end of the shutdown control signal, and the output end of the shutdown filter unit is connected to the self-locking module.

[0009] In combination with the first aspect, in one implementation, the starting filter unit includes: a first starting diode, a second starting diode, a first starting resistor, a second starting resistor, a third starting resistor, a fourth starting resistor, a starting capacitor, and a starting optocoupler; The positive electrode end of the first starting diode is connected to the busbar end, the negative electrode end of the first starting diode is respectively connected to the first end of the first starting resistor, the first end of the second starting resistor, and the first end of the third starting resistor, the second end of the second starting resistor and the second end of the third starting resistor are respectively connected to the first end of the starting capacitor, the first end of the fourth starting resistor, and the input end of the starting optocoupler, the output end of the starting optocoupler is respectively connected to the second end of the fourth starting resistor and the negative electrode end of the second starting diode, the control signal end of the starting control signal is respectively connected to the second end of the first starting resistor, the second end of the starting capacitor, and the positive electrode end of the second starting diode, and the output end of the starting optocoupler is connected to the self-locking module.

[0010] In combination with the first aspect, in one implementation, the shutdown filter unit includes: a first shutdown diode, a second shutdown diode, a first shutdown resistor, a second shutdown resistor, a third shutdown resistor, a third shutdown resistor, a fourth shutdown resistor, a shutdown capacitor, and a shutdown optocoupler; The positive electrode end of the first shutdown diode is connected to the busbar end, the negative electrode end of the first shutdown diode is respectively connected to the first end of the first shutdown resistor, the first end of the second shutdown resistor, and the first end of the third shutdown resistor, the second end of the second shutdown resistor and the second end of the third shutdown resistor are respectively connected to the first end of the shutdown capacitor, the first end of the fourth shutdown resistor, and the input end of the shutdown optocoupler, the output end of the shutdown optocoupler is respectively connected to the second end of the fourth shutdown resistor and the negative electrode end of the second shutdown diode, the control signal end of the shutdown control signal is respectively connected to the second end of the first shutdown resistor, the second end of the shutdown capacitor, and the positive electrode end of the second shutdown diode, and the output end of the shutdown optocoupler is connected to the self-locking module.

[0011] In combination with the first aspect, in one implementation, the self-locking module includes: a first self-locking switch tube and a second self-locking switch tube; The emitter of the first self-locking switch tube is connected to the first output terminal of the start-up optocoupler. The collector of the first self-locking switch tube and the base of the second self-locking switch tube are respectively connected to the second output terminal of the start-up optocoupler. The collector of the second self-locking switch tube is connected to the input terminal of the drive control module, and the emitter of the second self-locking switch tube is connected to the ground terminal.

[0012] In combination with the first aspect, in an implementation manner, the self-locking module further includes: a first start-up voltage-dividing resistor, a second start-up voltage-dividing resistor, a third start-up voltage-dividing resistor, a fourth start-up voltage-dividing resistor, a fifth start-up voltage-dividing resistor, a sixth start-up voltage-dividing resistor, a seventh start-up voltage-dividing resistor, and a start-up voltage-dividing diode; The first end of the first start-up voltage-dividing resistor is connected to the first output terminal of the start-up optocoupler. The second end of the first start-up voltage-dividing resistor is respectively connected to the first end of the second start-up voltage-dividing resistor, the first end of the third start-up voltage-dividing resistor, and the emitter of the first self-locking switch tube; The second end of the second start-up voltage-dividing resistor is connected to the first end of the fourth start-up voltage-dividing resistor. The second end of the third start-up voltage-dividing resistor is connected to the first end of the fifth start-up voltage-dividing resistor. The first ends of the fourth start-up voltage-dividing resistor and the fifth start-up voltage-dividing resistor are connected. The second ends of the fourth start-up voltage-dividing resistor and the fifth start-up voltage-dividing resistor are respectively connected to the power supply terminal; The positive terminal of the start-up voltage-dividing diode is connected to the collector of the first self-locking switch tube. The negative terminal of the start-up voltage-dividing diode is connected to the first end of the sixth start-up voltage-dividing resistor. The second end of the sixth start-up voltage-dividing resistor is respectively connected to the base of the second self-locking switch tube and the first end of the seventh start-up voltage-dividing resistor. The second end of the seventh start-up voltage-dividing resistor is connected to the ground terminal.

[0013] In combination with the first aspect, in an implementation manner, the self-locking module further includes: a first switch voltage-dividing resistor, a second switch voltage-dividing resistor, a third switch voltage-dividing resistor, a fourth switch voltage-dividing resistor, a fifth switch voltage-dividing resistor, and a sixth switch voltage-dividing resistor; The first ends of the first switch voltage-dividing resistor and the second switch voltage-dividing resistor are respectively connected to the power supply terminal. The second end of the first switch voltage-dividing resistor is connected to the first end of the third switch voltage-dividing resistor. The second end of the second switch voltage-dividing resistor is connected to the first end of the fourth switch voltage-dividing resistor. The first ends of the third switch voltage-dividing resistor and the fourth switch voltage-dividing resistor are connected; The second end of the third switch voltage-dividing resistor and the second end of the fourth switch voltage-dividing resistor are respectively connected to the first end of the fifth switch voltage-dividing resistor. The second end of the fifth switch voltage-dividing resistor is respectively connected to the input end of the drive control module and the first end of the sixth switch voltage-dividing resistor. The second end of the sixth switch voltage-dividing resistor is connected to the ground terminal.

[0014] Combined with the first aspect, in an implementation, the self-locking module further includes: a first self-locking resistor, a second self-locking resistor, a first self-locking diode, a second self-locking diode, a third self-locking diode, a fourth self-locking diode, a fifth self-locking diode, and a sixth self-locking diode; The emitter of the first self-locking switch tube is respectively connected to the first end of the first self-locking resistor and the negative electrode of the fourth self-locking diode. The second end of the first self-locking resistor is respectively connected to the base of the first self-locking switch tube and the first end of the second self-locking resistor. The second end of the second self-locking resistor is connected to the positive electrode of the first self-locking diode. The negative electrode of the first self-locking diode is respectively connected to the collector of the second self-locking switch tube and the negative electrode of the second self-locking diode. The positive electrode of the second self-locking diode is respectively connected to the positive electrode of the third self-locking diode, the negative electrode of the fifth self-locking diode, and the second end of the third switch voltage-dividing resistor. The negative electrode of the third self-locking diode is connected to the first end of the fifth switch voltage-dividing resistor; The negative electrode of the sixth self-locking diode is connected to the second end of the fifth switch voltage-dividing resistor. The positive electrodes of the fourth self-locking diode, the fifth self-locking diode, and the sixth self-locking diode are respectively connected to the ground terminal.

[0015] Combined with the first aspect, in an implementation, the self-locking module further includes: a first self-locking capacitor, a second self-locking capacitor, a third self-locking capacitor, a fourth self-locking capacitor, a fifth self-locking capacitor, a sixth self-locking capacitor, and a seventh self-locking capacitor; The first end of the first self-locking capacitor is connected to the first end of the first self-locking resistor. The second end of the first self-locking capacitor is connected to the second end of the first self-locking resistor. The first end of the second self-locking capacitor is connected to the power supply terminal. The second end of the second self-locking capacitor is connected to the second end of the fourth switch voltage-dividing resistor; The first end of the third self-locking capacitor is connected to the first end of the fourth self-locking diode. The first end of the fourth self-locking capacitor is connected to the collector of the first self-locking switch tube. The first end of the fifth self-locking capacitor is connected to the base of the second self-locking switch tube. The first end of the sixth self-locking capacitor is connected to the negative electrode of the fifth self-locking diode. The first end of the seventh self-locking capacitor is connected to the negative electrode of the sixth self-locking diode; The second ends of the third self-locking capacitor, the fourth self-locking capacitor, the fifth self-locking capacitor, the sixth self-locking capacitor, and the seventh self-locking capacitor are respectively connected to the ground terminal.

[0016] In combination with the first aspect, in one implementation, the drive control module includes: a drive triode, a drive diode, and a plurality of control diodes; Taking the base terminal of the drive triode as the input terminal of the drive control module, the collector of the drive triode is respectively connected to the negative electrode of the drive diode and the negative electrode of each control diode, the emitter of the drive triode and the positive electrode of the drive diode are respectively connected to the ground terminal, and taking the positive electrode of each control diode as the output terminal of the drive control module to be connected to the backend device terminal.

[0017] Compared with the prior art, a control circuit provided by an embodiment of the present invention has the beneficial effects that: the present invention can directly collect control signals through a filtering control module, and control the subsequent circuit to conduct or turn off according to the received control signals, without setting a circuit switch to control signal transmission, and there is no need for multiple operations during control, which can simplify signal transmission processing and improve control efficiency; and each operation is triggered and processed through control signals, which can reduce the number of repeated operations, thereby reducing the probability of errors and improving the control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the present application, the drawings required for implementation will be briefly introduced below. Obviously, the drawings in the following description are only some implementations of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of a control circuit provided by an embodiment of the present invention; Figure 2 is a circuit schematic diagram of a control circuit provided by an embodiment of the present invention; Figure 3 is a circuit schematic diagram of the backend device terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] To solve the above problems, the following will introduce and illustrate in detail a control circuit provided by an embodiment of the present application through the following specific embodiments.

[0022] Referring to Figure 1 , a schematic structural diagram of a control circuit provided by an embodiment of the present invention is shown.

[0023] Among them, by way of example, the control circuit may include: a filtering control module, a self-locking module, and a driving control module; The filtering control module, the self-locking module, and the driving control module are connected in sequence. The filtering control module is respectively connected to the bus terminal and the control signal terminal, and the driving control module is connected to the rear-end device terminal; Before the control signal is input to the control signal terminal, the filtering control module controls the self-locking module and the driving control module to disconnect according to the bus terminal; After the control signal is input to the control signal terminal, the filtering control module controls the self-locking module and the driving control module to conduct or disconnect according to the control signal.

[0024] In one embodiment, the filtering control module can be used to receive different control signals, filter the control signals, and then transmit the filtered control signals to the self-locking module, so that the self-locking module conducts or closes.

[0025] The self-locking module is used to provide a self-locking protection function. When the control signal is interrupted, the subsequent circuit modules can still maintain the working state.

[0026] The driving control module is used to control the rear-end device to perform different operations according to the control signal.

[0027] The present invention can directly collect the control signal through the filtering control module, and control the subsequent circuit to conduct or close according to the received control signal, without setting a circuit switch to control the signal transmission. During control, there is no need for multiple operations, which can simplify the signal transmission process and improve the control efficiency; and each operation is triggered and processed through the control signal, which can reduce the number of repeated operations, thereby reducing the probability of errors and improving the control accuracy.

[0028] In one embodiment, the control signal may include a start control signal and a stop control signal. In order to receive different control signals to distinguish different control signals, referring to Figure 1 , among them, by way of example, the filtering control module includes: a start filtering unit and a stop filtering unit; The first end of the start filtering unit is connected to the bus terminal, the second end of the start filtering unit is connected to the control signal terminal of the start control signal, and the output end of the start filtering unit is connected to the self-locking module; The first end of the shutdown filtering unit is connected to the bus terminal, the second end of the shutdown filtering unit is connected to the control signal terminal of the shutdown control signal, and the output end of the shutdown filtering unit is connected to the self-locking module.

[0029] Specifically, the bus terminal can be used to provide a stable voltage signal. The second end of the startup filtering unit can be connected to the control signal terminal of the startup control signal to receive the startup control signal, and at the same time, transmit the startup control signal to the self-locking module through the output end, so that the self-locking module starts to conduct.

[0030] Similarly, the second end of the shutdown filtering unit is connected to the control signal terminal of the shutdown control signal to receive the shutdown control signal, and at the same time, transmit the shutdown control signal to the self-locking module through the output end, so that the self-locking module shuts down.

[0031] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0032] In one embodiment, the startup filtering unit includes: a first startup diode V7, a second startup diode V16, a first startup resistor R68, a second startup resistor R61, a third startup resistor R64, a fourth startup resistor R69, a startup capacitor C171, and a startup optocoupler U1; The positive terminal of the first startup diode V7 is connected to the bus terminal. The negative terminal of the first startup diode V7 is respectively connected to the first end of the first startup resistor R68, the first end of the second startup resistor R61, and the first end of the third startup resistor R64. The second end of the second startup resistor R61 and the second end of the third startup resistor R64 are respectively connected to the first end of the startup capacitor C171, the first end of the fourth startup resistor R69, and the input end of the startup optocoupler U1. The output end of the startup optocoupler U1 is respectively connected to the second end of the fourth startup resistor R69 and the negative terminal of the second startup diode V16. The control signal terminal of the startup control signal is respectively connected to the second end of the first startup resistor R68, the second end of the startup capacitor C171, and the positive terminal of the second startup diode V16. The output end of the startup optocoupler U1 is connected to the self-locking module.

[0033] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0034] In one embodiment, the shutdown filtering unit includes: a first shutdown diode V17, a second shutdown diode V24, a first shutdown resistor R79, a second shutdown resistor R71, a third shutdown resistor R75, a fourth shutdown resistor R80, a shutdown capacitor C176, and a shutdown optocoupler U2; The positive terminal of the first shutdown diode V17 is connected to the bus terminal. The negative terminal of the first shutdown diode V17 is respectively connected to the first terminal of the first shutdown resistor R79, the first terminal of the second shutdown resistor R71, and the first terminal of the third shutdown resistor R75. The second terminal of the second shutdown resistor R71 and the second terminal of the third shutdown resistor R75 are respectively connected to the first terminal of the shutdown capacitor C176, the first terminal of the fourth shutdown resistor R80, and the input terminal of the shutdown optocoupler U2. The output terminal of the shutdown optocoupler U2 is respectively connected to the second terminal of the fourth shutdown resistor R80 and the negative terminal of the second shutdown diode V24. The control signal terminal of the shutdown control signal is respectively connected to the second terminal of the first shutdown resistor R79, the second terminal of the shutdown capacitor C176, and the positive terminal of the second shutdown diode V24. The output terminal of the shutdown optocoupler U2 is connected to the self-locking module.

[0035] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0036] In one embodiment, the self-locking module includes: a first self-locking switch tube V8 and a second self-locking switch tube V11; the emitter of the first self-locking switch tube V8 is connected to the first output terminal of the start-up optocoupler U1, the collector of the first self-locking switch tube V8 and the base of the second self-locking switch tube V11 are respectively connected to the second output terminal of the start-up optocoupler U1, the collector of the second self-locking switch tube V11 is connected to the input terminal of the drive control module, and the emitter of the second self-locking switch tube V11 is connected to the ground terminal.

[0037] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0038] In one embodiment, the self-locking module further includes: a first start-up voltage-dividing resistor R63, a second start-up voltage-dividing resistor R57, a third start-up voltage-dividing resistor R58, a fourth start-up voltage-dividing resistor R47, a fifth start-up voltage-dividing resistor R48, a sixth start-up voltage-dividing resistor R70, a seventh start-up voltage-dividing resistor R81, and a start-up voltage-dividing diode V18; The first terminal of the first start-up voltage-dividing resistor R63 is connected to the first output terminal of the start-up optocoupler U1. The second terminal of the first start-up voltage-dividing resistor R63 is respectively connected to the first terminal of the second start-up voltage-dividing resistor R57, the first terminal of the third start-up voltage-dividing resistor R58, and the emitter of the first self-locking switch tube V8; The second end of the second start-up voltage-dividing resistor R57 is connected to the first end of the fourth start-up voltage-dividing resistor R47. The second end of the third start-up voltage-dividing resistor R58 is connected to the first end of the fifth start-up voltage-dividing resistor R48. The first ends of the fourth start-up voltage-dividing resistor R47 and the fifth start-up voltage-dividing resistor R48 are connected. The second ends of the fourth start-up voltage-dividing resistor R47 and the fifth start-up voltage-dividing resistor R48 are respectively connected to the power supply terminal. The positive electrode end of the start-up voltage-dividing diode V18 is connected to the collector of the first self-locking switching tube V8. The negative electrode end of the start-up voltage-dividing diode V18 is connected to the first end of the sixth start-up voltage-dividing resistor R70. The second end of the sixth start-up voltage-dividing resistor R70 is respectively connected to the base of the second self-locking switching tube V11 and the first end of the seventh start-up voltage-dividing resistor R81. The second end of the seventh start-up voltage-dividing resistor R81 is connected to the ground terminal.

[0039] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0040] In an embodiment, the self-locking module further includes: a first switch voltage-dividing resistor R49, a second switch voltage-dividing resistor R50, a third switch voltage-dividing resistor R59, a fourth switch voltage-dividing resistor R60, a fifth switch voltage-dividing resistor R67, and a sixth switch voltage-dividing resistor R82; The first ends of the first switch voltage-dividing resistor R49 and the second switch voltage-dividing resistor R50 are respectively connected to the power supply terminal. The second end of the first switch voltage-dividing resistor R49 is connected to the first end of the third switch voltage-dividing resistor R59. The second end of the second switch voltage-dividing resistor R50 is connected to the first end of the fourth switch voltage-dividing resistor R60. The first ends of the third switch voltage-dividing resistor R59 and the fourth switch voltage-dividing resistor R60 are connected; The second ends of the third switch voltage-dividing resistor R59 and the fourth switch voltage-dividing resistor R60 are respectively connected to the first end of the fifth switch voltage-dividing resistor R67. The second end of the fifth switch voltage-dividing resistor R67 is respectively connected to the input end of the drive control module and the first end of the sixth switch voltage-dividing resistor R82. The second end of the sixth switch voltage-dividing resistor R82 is connected to the ground terminal.

[0041] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0042] In one embodiment, the self-locking module further includes: a first self-locking resistor R62, a second self-locking resistor R66, a first self-locking diode V10, a second self-locking diode V12, a third self-locking diode V15, a fourth self-locking diode V21, a fifth self-locking diode V22, and a sixth self-locking diode V23; The emitter of the first self-locking switch transistor V8 is respectively connected to the first end of the first self-locking resistor R62 and the cathode of the fourth self-locking diode V21. The second end of the first self-locking resistor R62 is respectively connected to the base of the first self-locking switch transistor V8 and the first end of the second self-locking resistor R66. The second end of the second self-locking resistor R66 is connected to the anode of the first self-locking diode V10. The cathode of the first self-locking diode V10 is respectively connected to the collector of the second self-locking switch transistor V11 and the cathode of the second self-locking diode V12. The anode of the second self-locking diode V12 is respectively connected to the anode of the third self-locking diode V15, the cathode of the fifth self-locking diode V22, and the second end of the third switching voltage-dividing resistor R59. The cathode of the third self-locking diode V15 is connected to the first end of the fifth switching voltage-dividing resistor R67. The cathode of the sixth self-locking diode V23 is connected to the second end of the fifth switching voltage-dividing resistor R67. The anodes of the fourth self-locking diode V21, the fifth self-locking diode V22, and the sixth self-locking diode V23 are respectively connected to the ground terminal.

[0043] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0044] In one embodiment, the self-locking module further includes: a first self-locking capacitor C166, a second self-locking capacitor C170, a third self-locking capacitor C175, a fourth self-locking capacitor C177, a fifth self-locking capacitor C178, a sixth self-locking capacitor C179, and a seventh self-locking capacitor C180; The first end of the first self-locking capacitor C166 is connected to the first end of the first self-locking resistor R62, and the second end of the first self-locking capacitor C166 is connected to the second end of the first self-locking resistor R62. The first end of the second self-locking capacitor C170 is connected to the power supply terminal, and the second end of the second self-locking capacitor C170 is connected to the second end of the fourth switching voltage-dividing resistor R60; The first end of the third self-locking capacitor C175 is connected to the first end of the fourth self-locking diode V21. The first end of the fourth self-locking capacitor C177 is connected to the collector of the first self-locking switch transistor V8. The first end of the fifth self-locking capacitor C178 is connected to the base of the second self-locking switch transistor V11. The first end of the sixth self-locking capacitor C179 is connected to the negative electrode of the fifth self-locking diode V22. The first end of the seventh self-locking capacitor C180 is connected to the negative electrode of the sixth self-locking diode V23; The second ends of the third self-locking capacitor C175, the fourth self-locking capacitor C177, the fifth self-locking capacitor C178, the sixth self-locking capacitor C179 and the seventh self-locking capacitor C180 are respectively connected to the ground terminal.

[0045] Refer to Figure 2 , which shows the circuit schematic diagram of a control circuit provided by an embodiment of the present invention.

[0046] In one embodiment, the drive control module includes: a drive triode V13, a drive diode V20 and a plurality of control diodes.

[0047] In a practical operation mode, five control diodes can be provided, namely V5, V6, V9, V14 and V19.

[0048] Taking the base terminal of the drive triode V13 as the input end of the drive control module, the collector of the drive triode V13 is respectively connected to the negative electrode of the drive diode V20 and the negative electrode of each control diode. The emitter of the drive triode V13 and the positive electrode of the drive diode V20 are respectively connected to the ground terminal. Taking the positive electrode of each control diode as the output end of the drive control module to be connected to the rear-end device terminal.

[0049] During actual use, if the user does not issue any instructions, and at this time the control circuit has no control signal and the system does not issue any instructions: The first start resistor R68 and the first shutdown resistor R79 can act as pull-up resistors. The signal terminals of start control (power-on OC) and shutdown control (power-off OC) are in a high-level state. No current flows through the emitter terminals of the start optocoupler U1 and the shutdown optocoupler U2, and the receiver terminals of the start optocoupler U1 and the shutdown optocoupler U2 are not conducting. Therefore, the second self-locking switch tube V11 and the first self-locking switch tube V8 are also not conducting and are in a high-impedance state. The controlled terminal of the drive triode V13 is divided by the first switch voltage-dividing resistor R49, the second switch voltage-dividing resistor R50, the third switch voltage-dividing resistor R59, the fourth switch voltage-dividing resistor R60, the fifth switch voltage-dividing resistor R67, the sixth switch voltage-dividing resistor R82, and the second start diode V16 and is at a high level. Therefore, the drive triode V13 conducts, and the voltages of the subsequent circuits are pulled down by controlling the conduction of the diodes V5, V6, V9, V14, and V19.

[0050] Referring to Figure 3 , the circuit schematic diagram of the backend device provided by an embodiment of the present invention is shown. As Figure 3 shown, the ON / OFF of the subsequent circuit is short-circuited to the input ground or the low-level module output is turned off. On the contrary, when ON / OFF is floating or the high-level module outputs, the subsequent circuit is powered off after the output is turned off, and the function of the component power supply is in the off state.

[0051] If a startup instruction is issued, a start control signal can be received. This start control signal can be a low-level pulse signal. At this time, the power-on OC terminal is at a low level. A path is formed from the instruction bus terminal V+, through the first start diode V7, the second start resistor R61, the third start resistor R64, the emitter terminal of the start optocoupler U1, and the second start diode V16 to the instruction terminal power-on OC. Current flows through the emitter terminal of the start optocoupler U1, and the magnitude of the current depends on the voltage at the instruction bus terminal V+, the voltage stabilization value of the second start diode V16, and the resistance values of the second start resistor R61 and the third start resistor R64. Among them, the second start diode V16 can be a voltage-stabilizing diode.

[0052] When the current at the emitting end of the startup optocoupler U1 is sufficient, the receiving end is fully conducting. According to the voltage division by the first startup voltage-dividing resistor R63, the second startup voltage-dividing resistor R57, the third startup voltage-dividing resistor R58, the fourth startup voltage-dividing resistor R47, the fifth startup voltage-dividing resistor R48, the sixth startup voltage-dividing resistor R70, the seventh startup voltage-dividing resistor R81, the startup voltage-dividing diode V18, the control end of the second self-locking switch tube V11 is at a high level. Thus, the second self-locking switch tube V11 conducts. The conduction of the second self-locking switch tube V11 causes the control ends of the first self-locking switch tube V8 and the driving triode V13 to be in a low-level state. Then, the control-end voltage of the driving triode V13 is pulled low, and the driving triode V13 is cut off, controlling the diodes V5, V6, V9, V14, and V19 not to conduct. After disconnection, the control-end voltage of the subsequent circuit is in a high-level state. Thus, the subsequent circuit outputs. The function of the component power supply is in the output state.

[0053] Meanwhile, after the second self-locking switch tube V11 conducts, the control-end level of the first self-locking switch tube V8 is pulled low, causing the first self-locking switch tube V8 to maintain the conducting state. At this time, even if the pulse signal of the power-on command has disappeared, the terminal power-on OC maintains a high-level state through the pull-up resistor of the first startup resistor R68. The first self-locking switch tube V8 and the second self-locking switch tube V11 still remain conducting, and the subsequent circuit operates normally, and the component power supply maintains the power-on state with all outputs.

[0054] If a power-off shutdown command is issued, the shutdown control signal can be a low-level pulse signal. The power-off OC terminal is at a low level. A loop is formed from the command bus terminal V+, through the first shutdown diode V17, the second shutdown resistor R71, the third shutdown resistor R75, the emitting end of the shutdown optocoupler U2, the second shutdown diode V24 to the power-off OC terminal of the command. There is current flowing through the emitting end of the shutdown optocoupler U2, and the magnitude of the current depends on the voltage at the command bus terminal V+, the regulated voltage value of the fifth self-locking diode V22, and the resistance values of the second shutdown resistor R71 and the third shutdown resistor R75. When the current at the emitting end of the shutdown optocoupler U2 is sufficient, the receiving end is fully conducting, pulling down the level of the control end of the second self-locking switch tube V11.

[0055] When the power-off OC terminal receives a power-off low-level pulse, a current path is formed through the first shutdown diode V17, the second shutdown resistor R71, the third shutdown resistor R75, the shutdown optocoupler U2, and the second shutdown diode V24. The primary diode of the shutdown optocoupler U2 conducts, and the secondary emitter conducts, pulling down the voltage across the fourth self-locking capacitor C177 to approximately 0.2V. At the same time, the voltage across the fourth self-locking capacitor C177 also passes through the startup voltage-dividing diode V18, the sixth startup voltage-dividing resistor R70, and the base of the second self-locking switch transistor V11. Since the voltage across the fourth self-locking capacitor C177 is pulled down, the voltage applied to the base of the startup voltage-dividing diode V18, the sixth startup voltage-dividing resistor R70, and the second self-locking switch transistor V11 is also pulled down to approximately 0.2V at the same time. The base voltage of the second self-locking switch transistor V11 is not sufficient to satisfy the conduction of the triode, so it is in the cut-off state. Therefore, the second self-locking switch transistor V11 is cut off and does not conduct. The non-conduction of the second self-locking switch transistor V11 causes the controlled terminals of the first self-locking switch transistor V8 and the drive triode V13 to be in a high-level state. Then the drive triode V13 conducts. After the drive triode V13 conducts, it presents a low-impedance state. At this time, the control diodes V5, V6, V9, V14, and V19 conduct to pull down the voltage of the control terminal of the subsequent circuit. Thus, the output is turned off. The subsequent circuit is powered off, and the function of the component power supply is in the off state. At the same time, the control terminal voltage of the first self-locking switch transistor V8 is pulled down and cut off, resulting in no freewheeling voltage at the control terminal of the second self-locking switch transistor V11, causing it to cut off.

[0056] Refer to Figure 2 , the switching transistors of the self-locking module are connected back-to-back with N-type and P-type transistors. The triode model can be selected according to the actual use situation to increase the control current and drive current of the subsequent stage; the back-to-back self-locking connection and the addition of RC filter circuits at the control terminals of each switching transistor can improve the circuit stability and anti-interference ability. The addition of zener diodes at the control terminals of the first self-locking switch transistor V8, the second self-locking switch transistor V11, and the drive triode V13 can be used for high-voltage power supply. The addition of anti-reverse diodes at the control terminals of the first self-locking switch transistor V8, the second self-locking switch transistor V11, and the drive triode V13 protects the normal operation of the control circuit.

[0057] In this embodiment, the present invention provides a control circuit, and its beneficial effects are as follows: The present invention can directly collect control signals through the filtering control module and control the conduction or shutdown of the subsequent circuit according to the received control signals. There is no need to set up a circuit switch to control signal transmission, and there is no need for multiple operations during control, which can simplify signal transmission processing and improve control efficiency; and each operation is triggered by a control signal for processing, which can reduce the number of repeated operations, thereby reducing the probability of errors and improving the control accuracy.

[0058] Those skilled in the art can clearly understand that for the sake of convenient description and brevity, the specific working process of the device described above can refer to the corresponding process in the foregoing method embodiments, and will not be elaborated herein.

[0059] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. When an element such as a layer, region or substrate is referred to as being "on" or "above" another element, it can be directly on the other element, or there can also be an intermediate element. On the contrary, when an element is referred to as being "directly on" or "above" another element, there is no intermediate element. It should also be understood that when an element is referred to as being "under" or "below" another element, it can be directly under or below the other element, or there can also be an intermediate element. On the contrary, when an element is referred to as being "directly under" or "below" another element, there is no intermediate element. Unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Those skilled in the art should understand that the embodiments of the present application can also provide a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0061] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), apparatuses, and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be realized by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate for realizing in the process Figure 1One or more processes and / or blocks Figure 1 Apparatus for the functions specified in one or more blocks

[0062] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce a manufacture including an instruction apparatus that implements the functions in the process Figure 1 One or more processes and / or blocks Figure 1 The functions specified in one or more blocks

[0063] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus, such that a series of operational steps are performed on the computer or other programmable apparatus to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable apparatus provide steps for implementing the functions in the process Figure 1 One or more processes and / or blocks Figure 1 The steps of the functions specified in one or more blocks

[0064] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A control circuit, characterized in that, The control circuit includes: a filtering control module, a self-locking module, and a driving control module; The filtering control module, the self-locking module, and the driving control module are connected in sequence. The filtering control module is respectively connected to the bus terminal and the control signal terminal, and the driving control module is connected to the backend device terminal; Before the control signal is input to the control signal terminal, the filtering control module controls the self-locking module and the driving control module to disconnect according to the bus terminal; After the control signal is input to the control signal terminal, the filtering control module controls the self-locking module and the driving control module to conduct or disconnect according to the control signal.

2. The control circuit according to claim 1, characterized in that The filtering control module includes: a starting filtering unit and a shutting-down filtering unit; The first end of the starting filtering unit is connected to the bus terminal, the second end of the starting filtering unit is connected to the control signal terminal of the starting control signal, and the output end of the starting filtering unit is connected to the self-locking module; The first end of the shutting-down filtering unit is connected to the bus terminal, the second end of the shutting-down filtering unit is connected to the control signal terminal of the shutting-down control signal, and the output end of the shutting-down filtering unit is connected to the self-locking module.

3. The control circuit according to claim 2, wherein The starting filtering unit includes: a first starting diode, a second starting diode, a first starting resistor, a second starting resistor, a third starting resistor, a fourth starting resistor, a starting capacitor, and a starting optocoupler; The positive terminal of the first starting diode is connected to the bus terminal. The negative terminal of the first starting diode is respectively connected to the first end of the first starting resistor, the first end of the second starting resistor, and the first end of the third starting resistor. The second end of the second starting resistor and the second end of the third starting resistor are respectively connected to the first end of the starting capacitor, the first end of the fourth starting resistor, and the input end of the starting optocoupler. The output end of the starting optocoupler is respectively connected to the second end of the fourth starting resistor and the negative terminal of the second starting diode. The control signal terminal of the starting control signal is respectively connected to the second end of the first starting resistor, the second end of the starting capacitor, and the positive terminal of the second starting diode. The output end of the starting optocoupler is connected to the self-locking module.

4. The control circuit according to claim 2, wherein The shutting-down filtering unit includes: a first shutting-down diode, a second shutting-down diode, a first shutting-down resistor, a second shutting-down resistor, a third shutting-down resistor, a third shutting-down resistor, a fourth shutting-down resistor, a shutting-down capacitor, and a shutting-down optocoupler; The positive terminal of the first shutdown diode is connected to the bus terminal. The negative terminal of the first shutdown diode is respectively connected to the first terminal of the first shutdown resistor, the first terminal of the second shutdown resistor, and the first terminal of the third shutdown resistor. The second terminal of the second shutdown resistor and the second terminal of the third shutdown resistor are respectively connected to the first terminal of the shutdown capacitor, the first terminal of the fourth shutdown resistor, and the input terminal of the shutdown optocoupler. The output terminal of the shutdown optocoupler is respectively connected to the second terminal of the fourth shutdown resistor and the negative terminal of the second shutdown diode. The control signal terminal of the shutdown control signal is respectively connected to the second terminal of the first shutdown resistor, the second terminal of the shutdown capacitor, and the positive terminal of the second shutdown diode. The output terminal of the shutdown optocoupler is connected to the self-locking module.

5. The control circuit according to claim 3, characterized in that, The self-locking module includes: a first self-locking switch tube and a second self-locking switch tube; The emitter of the first self-locking switch tube is connected to the first output terminal of the start-up optocoupler. The collector of the first self-locking switch tube and the base of the second self-locking switch tube are respectively connected to the second output terminal of the start-up optocoupler. The collector of the second self-locking switch tube is connected to the input terminal of the drive control module. The emitter of the second self-locking switch tube is connected to the ground terminal.

6. The control circuit according to claim 5, wherein The self-locking module further includes: a first start-up voltage-dividing resistor, a second start-up voltage-dividing resistor, a third start-up voltage-dividing resistor, a fourth start-up voltage-dividing resistor, a fifth start-up voltage-dividing resistor, a sixth start-up voltage-dividing resistor, a seventh start-up voltage-dividing resistor, and a start-up voltage-dividing diode; The first terminal of the first start-up voltage-dividing resistor is connected to the first output terminal of the start-up optocoupler. The second terminal of the first start-up voltage-dividing resistor is respectively connected to the first terminal of the second start-up voltage-dividing resistor, the first terminal of the third start-up voltage-dividing resistor, and the emitter of the first self-locking switch tube; The second terminal of the second start-up voltage-dividing resistor is connected to the first terminal of the fourth start-up voltage-dividing resistor. The second terminal of the third start-up voltage-dividing resistor is connected to the first terminal of the fifth start-up voltage-dividing resistor. The first terminal of the fourth start-up voltage-dividing resistor and the first terminal of the fifth start-up voltage-dividing resistor are connected. The second terminal of the fourth start-up voltage-dividing resistor and the second terminal of the fifth start-up voltage-dividing resistor are respectively connected to the power supply terminal; The positive terminal of the start-up voltage-dividing diode is connected to the collector of the first self-locking switch tube. The negative terminal of the start-up voltage-dividing diode is connected to the first terminal of the sixth start-up voltage-dividing resistor. The second terminal of the sixth start-up voltage-dividing resistor is respectively connected to the base of the second self-locking switch tube and the first terminal of the seventh start-up voltage-dividing resistor. The second terminal of the seventh start-up voltage-dividing resistor is connected to the ground terminal.

7. The control circuit according to claim 5, wherein The self-locking module further includes: a first switch voltage-dividing resistor, a second switch voltage-dividing resistor, a third switch voltage-dividing resistor, a fourth switch voltage-dividing resistor, a fifth switch voltage-dividing resistor, and a sixth switch voltage-dividing resistor; The first ends of the first switching voltage-dividing resistor and the second switching voltage-dividing resistor are respectively connected to the power supply terminal. The second end of the first switching voltage-dividing resistor is connected to the first end of the third switching voltage-dividing resistor. The second end of the second switching voltage-dividing resistor is connected to the first end of the fourth switching voltage-dividing resistor. The first ends of the third switching voltage-dividing resistor and the fourth switching voltage-dividing resistor are connected; The second ends of the third switching voltage-dividing resistor and the fourth switching voltage-dividing resistor are respectively connected to the first end of the fifth switching voltage-dividing resistor. The second end of the fifth switching voltage-dividing resistor is respectively connected to the input terminal of the drive control module and the first end of the sixth switching voltage-dividing resistor. The second end of the sixth switching voltage-dividing resistor is connected to the ground terminal.

8. The control circuit according to claim 7, wherein The self-locking module further includes: a first self-locking resistor, a second self-locking resistor, a first self-locking diode, a second self-locking diode, a third self-locking diode, a fourth self-locking diode, a fifth self-locking diode, and a sixth self-locking diode; The emitter of the first self-locking switch tube is respectively connected to the first end of the first self-locking resistor and the cathode of the fourth self-locking diode. The second end of the first self-locking resistor is respectively connected to the base of the first self-locking switch tube and the first end of the second self-locking resistor. The second end of the second self-locking resistor is connected to the anode of the first self-locking diode. The cathode of the first self-locking diode is respectively connected to the collector of the second self-locking switch tube and the cathode of the second self-locking diode. The anode of the second self-locking diode is respectively connected to the anode of the third self-locking diode, the cathode of the fifth self-locking diode, and the second end of the third switching voltage-dividing resistor. The cathode of the third self-locking diode is connected to the first end of the fifth switching voltage-dividing resistor; The cathode of the sixth self-locking diode is connected to the second end of the fifth switching voltage-dividing resistor. The anodes of the fourth self-locking diode, the fifth self-locking diode, and the sixth self-locking diode are respectively connected to the ground terminal.

9. The control circuit according to claim 8, characterized in that The self-locking module further includes: a first self-locking capacitor, a second self-locking capacitor, a third self-locking capacitor, a fourth self-locking capacitor, a fifth self-locking capacitor, a sixth self-locking capacitor, and a seventh self-locking capacitor; The first end of the first self-locking capacitor is connected to the first end of the first self-locking resistor. The second end of the first self-locking capacitor is connected to the second end of the first self-locking resistor. The first end of the second self-locking capacitor is connected to the power supply terminal. The second end of the second self-locking capacitor is connected to the second end of the fourth switching voltage-dividing resistor; The first end of the third self-locking capacitor is connected to the first end of the fourth self-locking diode. The first end of the fourth self-locking capacitor is connected to the collector of the first self-locking switch tube. The first end of the fifth self-locking capacitor is connected to the base of the second self-locking switch tube. The first end of the sixth self-locking capacitor is connected to the cathode of the fifth self-locking diode. The first end of the seventh self-locking capacitor is connected to the cathode of the sixth self-locking diode; The second ends of the third self-locking capacitor, the fourth self-locking capacitor, the fifth self-locking capacitor, the sixth self-locking capacitor, and the seventh self-locking capacitor are respectively connected to the ground terminal.

10. The control circuit according to any one of claims 1-9, characterized in that, The drive control module includes: A drive triode, a drive diode, and a plurality of control diodes; Taking the base terminal of the drive triode as the input terminal of the drive control module, the collector of the drive triode is respectively connected to the negative electrode of the drive diode and the negative electrode of each control diode, the emitter of the drive triode and the positive electrode of the drive diode are respectively connected to the ground terminal, and taking the positive electrode of each control diode as the output terminal of the drive control module to be connected to the backend device terminal.

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